U.S. patent application number 13/662715 was filed with the patent office on 2013-05-02 for watercraft.
This patent application is currently assigned to YAMAHA HATSUDOKI KABUSHIKI KAISHA. The applicant listed for this patent is Yamaha Hatsudoki Kabushiki Kaisha. Invention is credited to Shu AKUZAWA, Yoshimasa KINOSHITA.
Application Number | 20130110329 13/662715 |
Document ID | / |
Family ID | 47143621 |
Filed Date | 2013-05-02 |
United States Patent
Application |
20130110329 |
Kind Code |
A1 |
KINOSHITA; Yoshimasa ; et
al. |
May 2, 2013 |
WATERCRAFT
Abstract
A watercraft includes a plurality of devices, a central
controller, and a display device. The central controller is
programmed to execute centralized control of the devices. The
display device includes a touch panel function. The display device
is configured to communicate with the central controller, and to
display information regarding watercraft in a Graphical User
Interface (GUI) format.
Inventors: |
KINOSHITA; Yoshimasa;
(Shizuoka, JP) ; AKUZAWA; Shu; (Shizuoka,
JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Yamaha Hatsudoki Kabushiki Kaisha; |
Iwata-shi |
|
JP |
|
|
Assignee: |
YAMAHA HATSUDOKI KABUSHIKI
KAISHA
Iwata-shi
JP
|
Family ID: |
47143621 |
Appl. No.: |
13/662715 |
Filed: |
October 29, 2012 |
Current U.S.
Class: |
701/21 ; 367/107;
367/88; 701/29.1 |
Current CPC
Class: |
B63H 2025/028 20130101;
G06F 3/041 20130101; B63B 39/061 20130101; B63B 49/00 20130101;
G05D 1/0011 20130101; G06F 3/0346 20130101; G05D 1/0206 20130101;
B63B 79/00 20200101; B63H 2021/216 20130101; G06F 3/0481 20130101;
B63H 21/21 20130101; B63H 25/02 20130101 |
Class at
Publication: |
701/21 ;
701/29.1; 367/88; 367/107 |
International
Class: |
G05D 1/02 20060101
G05D001/02; G01S 15/04 20060101 G01S015/04; G01S 15/96 20060101
G01S015/96; B63B 9/00 20060101 B63B009/00 |
Foreign Application Data
Date |
Code |
Application Number |
Oct 31, 2011 |
JP |
2011-239144 |
Nov 10, 2011 |
JP |
2011-246688 |
Nov 10, 2011 |
JP |
2011-246689 |
Nov 10, 2011 |
JP |
2011-246690 |
Claims
1. A watercraft comprising: a plurality of devices; a central
controller programmed to execute centralized control of the
plurality of devices; and a display device including a touch panel
function; wherein the display device is arranged to communicate
with the central controller and to display information regarding
the watercraft in a Graphical User Interface format.
2. The watercraft according to claim 1, wherein the central
controller is programmed to communicate with an external mobile
terminal.
3. The watercraft according to claim 2, wherein the display device
displays a screen of an application running on the external mobile
terminal.
4. The watercraft according to claim 3, wherein touch panel
operations performed on the display device operate the external
mobile terminal.
5. The watercraft according to claim 1, wherein the display device
displays a software key to operate the plurality of devices.
6. The watercraft according to claim 5, wherein the plurality of
devices includes a power source that generates power to propel the
watercraft, and the software key is a start switch for the power
source.
7. The watercraft according to claim 5, wherein the plurality of
devices includes a power source that generates power to propel the
watercraft, and the software key is a stop switch for the power
source.
8. The watercraft according to claim 5, wherein the software key
controls a movement of the watercraft.
9. The watercraft according to claim 8, wherein the software key
controls a lateral movement of the watercraft.
10. The watercraft according to claim 8, wherein the software key
controls an in-place rotation of the watercraft.
11. A watercraft comprising: a plurality of devices; and a central
control unit including: a central controller programmed to execute
centralized control of the plurality of devices; and a display
device arranged to communicate with the central controller and to
display information regarding the watercraft in a Graphical User
Interface format; wherein the central control unit incorporates the
central controller and the display device into a single unit.
12. The watercraft according to claim 11, wherein the central
controller is programmed to communicate with an external mobile
terminal.
13. The watercraft according to claim 12, wherein the display
device displays a screen of an application running on the external
mobile terminal.
14. The watercraft according to claim 1, wherein the plurality of
devices includes an imaging device arranged to capture a still
image or a moving image; and the display device displays the still
image or the moving image captured by the imaging device.
15. The watercraft according to claim 14, wherein the central
controller includes a storage device to store electronic data of
the still image or the moving image captured with the imaging
device.
16. The watercraft according to claim 15, wherein the central
controller is programmed to transmit electronic data stored in the
storage device to an external terminal.
17. The watercraft according to claim 14, wherein the central
controller is programmed to determine if an obstacle exists in the
water around the watercraft by executing image processing of the
still image or the moving image captured by the imaging device, and
to notify an operator when the central controller determines that
an obstacle exists in the water.
18. The watercraft according to claim 1, wherein the plurality of
devices includes a power source that generates power to propel the
watercraft, an immobilizer receiver arranged on the display device,
and a portable immobilizer transmitter; and the central controller
is programmed to allow the power source to be started when an ID
code of the immobilizer transmitter received through the
immobilizer receiver matches a preset ID code.
19. The watercraft according to claim 1, wherein the plurality of
devices includes a power source that generates power to propel the
watercraft and a smart key system; the smart key system includes a
portable transmitter and a receiver arranged on a watercraft body
of the watercraft; and when the distance between the receiver and
the portable transmitter is equal to or smaller than a prescribed
distance, the central controller is programmed to allow the power
source to be started and to display a start switch for the power
source on the display device.
20. The watercraft according to claim 1, wherein the central
controller includes a communication device to connect the central
controller to the internet.
21. The watercraft according to claim 1, wherein the display device
displays a screen to perform maintenance on the watercraft.
22. The watercraft according to claim 1, wherein the display device
displays a screen to initialize settings of the watercraft.
23. The watercraft according to claim 1, wherein the plurality of
devices includes a sonar, and the display device displays
information regarding an obstacle in the water based on a signal
from the sonar.
24. The watercraft according to claim 1, wherein the plurality of
devices includes a fish finder, and the display device displays
fish school information based on a signal from the fish finder.
25. The watercraft according to claim 1, wherein the plurality of
devices include a fuel flow meter, the display device displays
rental management information regarding the watercraft, and the
rental management information includes information regarding an
amount of fuel used as measured by the fuel flow meter.
26. The watercraft according to claim 1, wherein the display device
displays rental management information regarding the watercraft,
and the rental management information includes information
regarding a rental time amount of the watercraft.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a watercraft.
[0003] 2. Description of the Related Art
[0004] Watercrafts are equipped with a variety of devices
supporting the functions of the watercraft. For example, the
watercraft disclosed in Laid-open Japanese Patent Application No.
2007-83767 is equipped with two outboard motors and a remote
control device. The watercraft also includes electric powered
steering devices, operating switches, and instrument panels
corresponding to each of the outboard motors. Each of these devices
includes a controller and the controllers of related devices are
connected to one another to define a network system of devices
inside the watercraft. More specifically, an electric powered
steering device, an operating switch, and an instrument panel is
provided with respect to each of two outboard motors, and is
connected to each of the controllers of the two outboard motors.
The controller of the remote control device is connected to the
controllers of the two outboard motors.
[0005] As explained above, in recent years watercraft include a
plurality of controllers in addition to the controller for the
engine. Thus, the number of controllers increases as the number of
devices increases. Consequently, as the number of devices
increases, the network system becomes more complex and the wiring
connecting the devices becomes more complex. Also, as the number of
operating switches and instrument panels increases, more work is
required to install each of these devices. Additionally, having a
large number of operating switches and instrument panels makes it
more difficult for an operator to recognize information regarding
the watercraft and causes the ease of operability to decline.
SUMMARY OF THE INVENTION
[0006] A first preferred embodiment of the present invention
provides a watercraft with which it is easier to arrange a network
system of devices and which enables the operability to be
improved.
[0007] A watercraft according to the first preferred embodiment of
the present invention includes a plurality of devices, a central
controller, and a display device. The central controller is
programmed to execute centralized control of the devices. The
display device preferably includes a touch panel function. The
display device is arranged to communicate with the central
controller, and display information regarding the watercraft in a
Graphical User Interface (GUI) format, for example.
[0008] A watercraft according to a modification of the first
preferred embodiment of the present invention includes a plurality
of devices and a central control unit. The central control unit is
an apparatus that incorporates a central controller and a display
device into a single unit. The central controller is programmed to
execute centralized control of the devices. The display device is
arranged to communicate with the central controller and display
information regarding watercraft in a GUI format, for example.
[0009] Preferably, the devices are centrally controlled by the
central controller. Consequently, it is easier to arrange a network
system of the devices. Since the devices are controlled centrally
by the central controller, the display device can display
information regarding the devices in a centralized manner by
communicating with the central controller. Also, since the
information regarding the watercraft is preferably displayed in a
GUI format, the operator can easily understand a plurality of
information displayed on the display device simultaneously. As a
result, the operability of the devices can be improved. Since the
display device preferably includes a touch panel function, the
operability of the devices can be improved even further.
[0010] Preferably, the devices are centrally controlled by the
central controller. Consequently, it is easier to arrange a network
system of the devices. Also, the central controller and the display
device are preferably integrated into a single central control
unit. Consequently, it is even easier to arrange a network system
of the devices. Additionally, since the devices are controlled
centrally by the central controller, the display device can display
information regarding the devices in a centralized manner by
communicating with the central controller. Also, since the
information regarding the watercraft is preferably displayed in a
GUI format, the operator can easily grasp a plurality of
information displayed on the display device simultaneously. As a
result, the operability of the devices can be improved.
[0011] The first preferred embodiment of the present invention can
also be applied to a second preferred embodiment of the present
invention, as will now be explained.
[0012] A conventional watercraft is provided with various switches
for operating devices installed on the watercraft. For example,
FIG. 6 of Laid-open Japanese Patent Application No. 2011-073606
discloses a dashboard of a watercraft. The dashboard is arranged
frontward of a helm seat and numerous switches including a blower
switch are arranged on the dashboard.
[0013] In recent years, the number of devices installed on
watercrafts has increased and thus the number of switches for
operating the devices has increased. Not only switches, but levers
and other operating members have also increased in number. As the
number of operating members increases, providing space in which to
arrange the operating members becomes a problem.
[0014] A second preferred embodiment of the present invention
provides a watercraft in which a large number of devices can be
operated while conserving space by minimizing the number of
operating members. The second preferred embodiment of the present
invention is explained below.
[0015] A watercraft according to the second preferred embodiment of
the present invention includes a plurality of devices, a controller
programmed to control the devices, and a display device that
communicates with the controller, wherein the display device
preferably includes a touch panel function and displays software
keys to operate the devices.
[0016] Preferably, the devices include a first device that
communicates with the controller using a first protocol and a
second device that communicates with the controller using a second
protocol different from the first protocol.
[0017] Preferably, the devices include a power source that
generates power to propel the watercraft, and the software keys
include a start switch for the power source.
[0018] Preferably, the devices include a power source that
generates power to propel the watercraft, and the software keys
include a stop switch for the power source.
[0019] Preferably, the devices include a first device and a second
device, and the display device displays a first software key to
operate the first device and a second software key to operate the
second device.
[0020] Preferably, the display device displays the first software
key and the second software key on the same screen.
[0021] Preferably, the display device displays a screen including
the first software key and a screen including the second software
key in a switchable fashion.
[0022] The first and second preferred embodiments can also be
applied to a third preferred embodiment of the present invention,
as will now be explained.
[0023] A conventional watercraft is equipped with a wireless
communication device for communicating with other watercrafts. For
example, Laid-open Japanese Patent Application No. 2010-147706
discloses a wireless communication device for a watercraft in which
a DSB transmitter is used. The DSB transmitter is one type of AM
transmitter that generates an AM signal including a carrier wave
whose amplitude is varied according to a signal.
[0024] Although the wireless communication device is used to
conduct wireless voice communications with another watercraft, it
is not acceptable to use it for conversations between passengers
onboard the same watercraft. On the deck of a watercraft,
particularly a PWC (personal watercraft), wind noise and other
noise makes it difficult for passengers to converse while the
watercraft is traveling.
[0025] A third preferred embodiment of the present invention
provides a watercraft that enables passengers onboard to converse
comfortably while the watercraft is traveling. The third preferred
embodiment of the present invention is explained below.
[0026] A watercraft according to the third preferred embodiment of
the present invention includes a plurality of devices, and a
controller programmed to control the devices, wherein the
controller is programmed to communicate with a plurality of
headsets each including a microphone and a speaker using a specific
wireless communication standard, and to execute control such that
audio data inputted to the microphone of one headset is outputted
from the speaker of another headset.
[0027] Preferably, when the controller detects trouble in at least
one of the devices, the controller outputs a warning sound from the
speakers of the headsets notifying of the trouble.
[0028] Preferably, the plurality of devices includes a power
source, and when the controller detects trouble of the power
source, the controller outputs a warning sound from the speakers of
the headsets notifying of the trouble.
[0029] Preferably, the controller includes a storage device and
outputs music stored in the storage device from the speakers of the
headsets.
[0030] Preferably, the controller is programmed to communicate with
an external mobile terminal and output music stored in the mobile
terminal from the speakers of the headsets.
[0031] Preferably, the controller is programmed to communicate with
an external mobile terminal and output music of an application
running on the mobile terminal from the speakers of the
headsets.
[0032] Preferably, the watercraft further includes a switch to
operate at least one of the devices, wherein the controller outputs
an operation confirmation sound of the switch from the speakers of
the headsets.
[0033] The first through third preferred embodiments of the present
invention can also be applied to a fourth preferred embodiment of
the present invention, as will now be explained.
[0034] A conventional watercraft is equipped with an operating
device for controlling movements of the watercraft. For example,
Japanese Laid-open Patent Application Publication No. 2011-140272
discloses a watercraft equipped with a joystick. The joystick
includes a lever that can be operated by tilting it from a neutral
position. A propulsion unit and a steering unit are controlled
according to the manipulation of the lever. More specifically, the
direction of a propulsion force is controlled according to an
operating direction of the lever. Meanwhile, the size of the
propulsion force is controlled according to a tilt amount of the
lever. When launching and docking, an operator operates the
joystick to pilot the watercraft.
[0035] During normal cruising of the watercraft, the operator
pilots the watercraft using a steering wheel or a remote control
lever. Thus, the joystick or other operating device used during
launching and docking is not used during normal cruising.
Consequently, it is preferable for the joystick or other operating
device to be compact so as not to become a nuisance during normal
cruising.
[0036] A fourth preferred embodiment of the present invention
reduces the size of an operating device of a watercraft. The fourth
preferred embodiment of the present invention is explained
below.
[0037] A watercraft according to the fourth preferred embodiment of
the present invention includes a power source, a controller
programmed to control the power source, and a display device that
communicates with the controller, wherein the display device
preferably includes a touch panel function and displays software
keys to control movements of the watercraft.
[0038] Preferably, the display device can display information
regarding the watercraft.
[0039] Preferably, the software keys include a key to control a
lateral movement of the watercraft.
[0040] Preferably, the software keys include a key to control an
in-place rotation of the watercraft.
[0041] Preferably, the software keys include a plurality of keys
corresponding to movement directions of the watercraft.
[0042] Preferably, the software keys include an operating icon
indicating a watercraft, and the watercraft is controlled to move
in a direction corresponding to a slide direction of the operating
icon when the operating icon is slid.
[0043] Preferably, the software keys include a lever-shaped
operating icon, and the watercraft is controlled to move in a
direction corresponding to a slide direction of the operating icon
when the operating icon is slid.
[0044] Preferably, the display device is detachably mounted to the
watercraft, and the display device communicates wirelessly with the
controller at least when it is detached from the watercraft.
[0045] A watercraft according to a modification of the fourth
preferred embodiment of the present invention includes a power
source and a controller programmed to control the power source,
wherein the controller is programmed to communicate with an
external mobile terminal preferably including a touch panel
function, and to control movements of the watercraft based on touch
panel operations performed on the mobile terminal.
[0046] A watercraft according to another modification of the fourth
preferred embodiment of the present invention includes a power
source, and a controller programmed to control the power source,
wherein the controller is programmed to communicate with an
external mobile terminal, wherein the mobile terminal is arranged
to detect tilting of the mobile terminal, and the controller is
programmed to control movements of the watercraft based on the tilt
of the mobile terminal.
[0047] The above and other elements, features, steps,
characteristics and advantages of the present invention will become
more apparent from the following detailed description of the
preferred embodiments with reference to the attached drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0048] FIG. 1 is a perspective view of a watercraft according to a
first preferred embodiment of the present invention.
[0049] FIG. 2 is a side view of a watercraft propulsion device for
a watercraft according to the first preferred embodiment of the
present invention.
[0050] FIG. 3 is a simple diagram showing constituent features of a
device network system of the watercraft.
[0051] FIG. 4 is a screenshot exemplifying a screen shown on a
display device.
[0052] FIG. 5 is a screenshot exemplifying another screen shown on
a display device.
[0053] FIG. 6 is a screenshot showing an obstacle monitoring
screen.
[0054] FIG. 7 is a side view showing a watercraft being transported
on land.
[0055] FIG. 8 is a bird's eye view showing the watercraft as
displayed on a car navigation system of an automobile.
[0056] FIG. 9 is a screenshot of software keys displayed on the
display device.
[0057] FIG. 10 is a screen shot showing an example of software keys
for piloting the watercraft.
[0058] FIG. 11 is a screen shot showing another example of software
keys for piloting the watercraft.
[0059] FIG. 12 is a screen shot showing still another example of
software keys for piloting the watercraft.
[0060] FIG. 13 is a screenshot showing an example of a mobile
terminal screen displayed on the display device.
[0061] FIG. 14 is a screenshot showing another example of a mobile
terminal screen displayed on the display device.
[0062] FIG. 15 is a cross sectional view of a water protective
case.
[0063] FIG. 16 is a simple sketch illustrating constituent features
of a theft prevention function.
[0064] FIG. 17 is a screenshot of a maintenance screen of the
watercraft displayed on the display device.
[0065] FIG. 18 is a screenshot of a setting screen of the
watercraft displayed on the display device.
[0066] FIG. 19 is a screenshot of a fish finder screen displayed on
the display device.
[0067] FIG. 20 is a screenshot of a rental management screen
displayed on the display device.
[0068] FIG. 21 is a simple diagram showing constituent features of
a device network system of a watercraft including a smart key
system.
[0069] FIG. 22 is a simple diagram showing constituent features of
a device network system of a watercraft according to a second
preferred embodiment of the present invention.
[0070] FIG. 23 is a side cross sectional view showing the structure
of a water jet propulsion device according to another preferred
embodiment of the present invention.
[0071] FIG. 24 is a plan view of a sport boat according to another
preferred embodiment of the present invention.
[0072] FIG. 25 is a side view of a PWC according to another
preferred embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0073] Preferred embodiments of the present invention will now be
explained with reference to the drawings.
[0074] FIG. 1 is a perspective view of a watercraft 1 according to
a first preferred embodiment of the present invention. The
watercraft 1 includes a watercraft body 2 and watercraft propulsion
devices 3a to 3c, for example. In the present preferred embodiment,
the watercraft 1 preferably includes three watercraft propulsion
devices (hereinafter called "first watercraft propulsion device
3a," "second watercraft propulsion device 3b" and "third watercraft
propulsion device 3c"). The first watercraft propulsion device 3a,
the second watercraft propulsion device 3b, and the third
watercraft propulsion device 3c are preferably outboard motors
mounted to a stern of the watercraft body 2. The first watercraft
propulsion device 3a, the second watercraft propulsion device 3b,
and the third watercraft propulsion device 3c are arranged along
the widthwise direction of the watercraft body 2. More
specifically, the first watercraft propulsion device 3a is arranged
on the starboard side of the stern, the second watercraft
propulsion device 3b is arranged on the port side of the stern, and
the third watercraft propulsion device 3c is arranged in the middle
of the stern, i.e., between the first watercraft propulsion device
3a and the second watercraft propulsion device 3b. The first
watercraft propulsion device 3a, the second watercraft propulsion
device 3b, and the third watercraft propulsion device 3c each
generate a propulsion force to propel the watercraft 1. The
watercraft body 2 includes a helm seat 4. A steering device 5, a
remote control device 6, a central controller 7, and a display
device 8 are arranged at the helm seat 4. The steering device 5 is
a device operated by an operator to control a turning direction of
the watercraft 1. The remote control device 6 is a device operated
by an operator to adjust the watercraft speed. The remote control
device 6 is also used by the operator to switch between forward
propulsion and reverse propulsion of the watercraft 1. The central
controller 7 executes centralized control of the devices installed
on the watercraft 1. The display device 8 is arranged frontward of
the helm seat 4 or in another position that is easily viewed from
the helm seat 4. The display device 8 communicates with the central
controller 7 and displays information regarding the watercraft 1.
The steering device 5, the remote control device 6, the central
controller 7, and the display device 8 will be explained in detail
below.
[0075] FIG. 2 is a side view showing the first watercraft
propulsion device 3a. The structure of the first watercraft
propulsion device 3a will now be explained. The structures of the
second watercraft propulsion device 3b and the third watercraft
propulsion device 3c are the same as the structure of the first
watercraft propulsion device 3a. The first watercraft propulsion
device 3a includes a cover member 11a, an engine 12a, a propeller
13a, a power transmitting mechanism 14a, and a bracket 15a. The
cover member 11a houses an engine 12a and the power transmitting
mechanism 14a. The engine 12a is arranged in an upper portion of
the first watercraft propulsion device 3a. The engine 12a is an
example of a power source that generates power for propelling the
watercraft 1. The propeller 13a is arranged in a lower portion of
the first watercraft propulsion device 3a. The propeller 13a is
rotationally driven by a drive force from the engine 12a. The power
transmitting mechanism 14a transmits a drive force from the engine
12a to the propeller 13a. The power transmitting mechanism 14a
includes a drive shaft 16a, a propeller shaft 17a, and a shift
mechanism 18a. The drive shaft 16a is arranged along a vertical
direction.
[0076] The drive shaft 16a is coupled to a crankshaft 19a of the
engine 12a and transmits power from the engine 12a. The propeller
shaft 17a is arranged along a longitudinal direction. The propeller
shaft 17a connects to a lower portion of the drive shaft 16a
through the shift mechanism 18a. The propeller shaft 17a transmits
a drive force from the drive shaft 16a to the propeller 13a.
[0077] The shift mechanism 18a is configured to change a rotation
direction of power transmitted from the drive shaft 16a to the
propeller shaft 17a. The shift mechanism 18a includes a pinion gear
21a, a forward propulsion gear 22a, a reverse propulsion gear 23a,
and a dog clutch 24a. The pinion gear 21a is connected to the drive
shaft 16a. The pinion gear 21a meshes with the forward propulsion
gear 22a and the reverse propulsion gear 23a. The forward
propulsion gear 22a and the reverse propulsion gear 23a are
arranged such that they can undergo relative rotation with respect
to the propeller shaft 17a. The dog clutch 24a is arranged such
that it can move along an axial direction of the propeller shaft 17
to a forward propulsion position, a reverse propulsion position,
and a neutral position. The neutral position is a position between
the forward propulsion position and the reverse propulsion
position. When the dog clutch 24a is positioned in the forward
propulsion position, rotation of the drive shaft 16a is transmitted
to the propeller shaft 17a through the forward propulsion gear 22a.
As a result, the propeller 13a rotates in a direction of propelling
the watercraft body 2 forward. When the dog clutch 24a is
positioned in the reverse propulsion position, rotation of the
drive shaft 16a is transmitted to the propeller shaft 17a through
the reverse propulsion gear 23a. As a result, the propeller 13a
rotates in a direction of propelling the watercraft body 2 in
reverse. When the dog clutch 24a is positioned in the neutral
position, the forward propulsion gear 22a and the reverse
propulsion gear 23a rotate relative to the propeller shaft 17a.
Thus, rotation from the drive shaft 16 is not transmitted to the
propeller shaft 17a and the propeller shaft 17a can rotate
idly.
[0078] The bracket 15a is a mechanism that mounts the first
watercraft propulsion device 3a to the watercraft body 2. The first
watercraft propulsion device 3a is fixed detachably to the stern of
the watercraft body 2 through the bracket 15a. The first watercraft
propulsion device 3a is mounted such that it can turn about a tilt
axis Ax1a of the bracket 15a. The tilt axis Ax1a extends in a
widthwise direction of the watercraft body 2. The first watercraft
propulsion device 3a is mounted such that it can turn about a
steering axis Ax2a of the bracket 15a. A steering angle can be
changed by turning the first watercraft propulsion device 3a about
the steering axis Ax2a. The steering angle is an angle that the
direction of a propulsion force makes with a centerline extending
along a longitudinal direction of the watercraft body 2. Also, by
turning the first watercraft propulsion device 3a about the tilt
axis Ax1a, a trim angle of the first watercraft propulsion device
3a can be changed. The trim angle is equivalent to amounting angle
of the watercraft propulsion device with respect to the watercraft
body 2.
[0079] FIG. 3 is a simple diagram showing constituent features of a
device network system installed in the watercraft 1. The device
network system includes the first watercraft propulsion device 3a,
the second watercraft propulsion device 3b, the third watercraft
propulsion device 3c, the steering device 5, the remote control
device 6, the central controller 7, and the display device 8. The
device network system of the watercraft 1 also includes a first
additional function system 9 and a second additional function
system 10.
[0080] The first watercraft propulsion device 3a includes a first
engine ECU (electronic control unit) 31a, a first starter motor
32a, a first fuel injection device 33a, a first throttle actuator
34a, a first ignition device 35a, a first shift actuator 36a, a
first tilt/trim actuator 37a, and a first steering actuator
38a.
[0081] The first starter motor 32a starts the engine 12a. The first
fuel injection device 33a injects fuel into a combustion chamber of
the engine 12a. The first throttle actuator 34a changes an opening
degree of throttle valve of the engine 12a. An amount of air-fuel
mixture delivered to the combustion chamber is adjusted by varying
the opening degree of the throttle valve of the engine 12a. The
ignition device 35a ignites fuel inside the combustion chamber. The
first shift actuator 36a changes the position of the dog clutch
24aamong the forward propulsion position, the reverse propulsion
position, and the neutral position. The first tilt/trim actuator
37a turns the first watercraft propulsion device 3a about a tilt
axis Ax1a of the bracket 15a. In this way, a tilt angle of the
first watercraft propulsion device 3a is changed. The first
steering actuator 38a turns the first watercraft propulsion device
3a about the steering axis Ax2a of the bracket 15a. In this way,
the steering angle of the first watercraft propulsion device 3a is
changed.
[0082] The first engine ECU 31a stores a control program for the
engine 12a. The first engine ECU 31a controls operations of the
first starter motor 32a, the first fuel injection device 33a, the
first throttle actuator 34a, the first ignition device 35a, the
first shift actuator 36a, the first tilt/trim actuator 37a, and the
first steering actuator 38a based on a signal from the steering
device 5, a signal from the remote control device 6, and detection
signals from other sensors (not shown in the drawings) installed in
the first watercraft propulsion device 3a. The first engine ECU 31a
is connected to the central controller 7 through a communication
line. For example, the first engine ECU 31a communicates with the
central controller 7 using a CAN (controller area network)
protocol.
[0083] The second watercraft propulsion device 3b includes a second
engine ECU 31b, a second starter motor 32b, a second fuel injection
device 33b, a second throttle actuator 34b, a second ignition
device 35b, a second shift actuator 36b, a second tilt/trim
actuator 37b, and a second steering actuator 38b. The third
watercraft propulsion device 3c includes a third engine ECU 31c, a
third starter motor 32c, a third fuel injection device 33c, a third
throttle actuator 34c, a third ignition device 35b, a third shift
actuator 36c, a third tilt/trim actuator 37c, and a third steering
actuator 38c. Since the component devices of the second watercraft
propulsion device 3b and the third watercraft propulsion device 3c
have the same functions as the component devices of the first
watercraft propulsion devices 3a, detailed descriptions of these
devices will be omitted. Also, in FIG. 3 component devices of the
first watercraft propulsion device 3a and the second watercraft
propulsion device 3b that correspond to each other are indicated
with the same reference numerals. Similarly, component devices of
the first watercraft propulsion device 3a and the third watercraft
propulsion device 3c that correspond to each other are indicated
with the same reference numerals.
[0084] The remote control device 6 includes a first operating
member 41a, a first operating position sensor 42a, a first PTT
operating member 43a, a second operating member 41b, a second
operating position sensor 42b, a second PTT operating member 43b,
and a remote control ECU 44. The first operating member 41a is, for
example, a lever. The first operating member 41a can be tilted
forward and rearward. The first operating position sensor 42a
detects an operating position of the first operating member 41a.
When an operator operates the first operating member 41a, the first
shift actuator 36a is driven such that the dog clutch 24a of the
first watercraft propulsion device 3a is set to a shift position
corresponding to the operating position of the first operating
member 41a. In this way, an operator can change the rotation
direction of the propeller 13a of the first watercraft propulsion
device 3a between a forward direction and a reverse direction.
Also, a target engine rotational speed of the first watercraft
propulsion device 3a is set to a value corresponding to the
operating position of the first operating member 41a. Thus, the
operator can adjust a rotational speed of the propeller 13a of the
first watercraft propulsion device 3a. The first PTT operating
member 43a is, for example, a switch. When an operator operates the
first PTT operating member 43a, the first tilt/trim actuator 37a is
driven. In this way, the operator can change a trim angle of the
first watercraft propulsion device 3a.
[0085] The second operating member 41b is, for example, a lever.
The second operating member 41b is arranged side-by-side (left and
right) with the first operating member 41a. The second operating
member 41b can be pivoted forward and rearward. The second
operating position sensor 42b detects an operating position of the
second operating member 41b. When an operator operates the second
operating member 41b, the second shift actuator 36b is driven such
that the dog clutch of the second watercraft propulsion device 3b
is set to a shift position corresponding to the operating position
of the second operating member 41b. In this way, an operator can
change the rotation direction of a propeller of the second
watercraft propulsion device 3b between a forward direction and a
reverse direction. A target engine rotational speed of the second
watercraft propulsion device 3b is set to a value corresponding to
the operating position of the second operating member 41b. Thus,
the operator can adjust a rotational speed of the propeller of the
second watercraft propulsion device 3b. The second PTT operating
member 43b is, for example, a switch. When an operator operates the
second PTT operating member 43b, the second tilt/trim actuator 37b
is driven. In this way, the operator can change a trim angle of the
second watercraft propulsion device 3b.
[0086] Switching of the propulsion direction of the third
watercraft propulsion device 3c between forward and reverse and
setting a target engine rotational speed of the third watercraft
propulsion device 3c are accomplished according to operations of
the first operating member 41a and the second operating member 41b.
More specifically, if the shift positions corresponding to the
operating positions of both the first operating member 41a and the
second operating member 41b are the same, then the dog clutch of
the third watercraft propulsion device 3c is set to that same shift
position. The target engine rotational speed of the third
watercraft propulsion device 3c is set to an average value of the
target engine rotational speed of the first watercraft propulsion
device 3a and the target engine rotational speed of the second
watercraft propulsion device 3b. If the shift positions
corresponding to the operating positions of both the first
operating member 41a and the second operating member 41b are not
the same, then the dog clutch of the third watercraft propulsion
device 3c is set to a neutral position. In such a case, the target
engine rotational speed of the third watercraft propulsion device
3c is set to a prescribed idle rotational speed.
[0087] The remote control ECU 44 is connected to the central
controller 7 through a communication line. For example, the remote
control ECU 44 communicates with the central controller 7 using an
analog signal. The remote control ECU 44 sends the detection signal
of the first operating position sensor 42a and the detection signal
of the second operating position sensor 42b to the central
controller 7. The remote control ECU 44 also sends operation
signals from the first PTT operating member 43a and the second PTT
operating member 43b to the central controller 7.
[0088] The steering device 5 includes a steering operating member
45, a steering position sensor 46, and a steering ECU 47. The
steering operating member 45 is, for example, a steering wheel. The
steering position sensor 46 detects an operating amount, i.e., an
operating angle, of the steering operating member 45. When an
operator operates the steering operating member 45, the first
steering actuator 38a, the second steering actuator 38b, and the
third steering actuator 38c are driven. As a result, the operator
can adjust an advancing direction of the watercraft 1. The steering
ECU 47 is connected to the central controller 7 through a
communication line. For example, the steering control ECU 47
communicates with the central controller 7 using an analog signal.
The steering ECU 47 transmits the detection signal of the steering
position sensor 46 to the central controller 7.
[0089] The additional function system 9 includes, for example, a
wiper 51, a blower 52, a sonar 53, a bilge pump 54, a trim tab 55,
a side thruster 56, a watercraft light 57, a speaker 58, and
various measurement devices 59. The wiper 51 is attached to a front
windshield frontward of the driver's seat. The blower 52 ventilates
the interior of an engine room. Although a blower 52 is provided
with respect to each of the first to third watercraft propulsion
devices 3a to 3c, in FIG. 3, only one blower 52 is shown and the
other blowers are omitted. The sonar 53 emits sound waves into the
water surrounding the watercraft body 2 and measures the positions
of objects in the water. The bilge pump 54 pumps water accumulated
in a bottom of the watercraft to the exterior of the watercraft.
The trim tab 55 significantly reduces and prevents shaking of the
watercraft body 2 in the leftward and rightward directions caused
by rotation of the propellers 13a. The trim tab 55 includes a fin
(not shown in the drawings) and a drive device that changes the
direction of the fin. Although a trim tab 55 is provided for each
of the first to third watercraft propulsion devices 3a to 3c, in
FIG. 3, only one trim tab 55 is shown and the other trim tabs are
omitted. The side thruster 56 generates a propulsion force to move
the watercraft body 2 in a lateral direction. The side thruster 56
includes, for example, a bow thruster provided on the bow and a
stern thruster provided on the stern. The side thruster 56 includes
a propeller (not shown) and a drive device that drives the
propeller. The watercraft light 57 includes, for example, a mast
light, a stern light, an anchor light, and a navigation light. The
speaker 58 is arranged inside the watercraft and emits sound. These
devices of the first additional function system 9 are connected to
the central controller 7 through a communication line. Devices of
the first additional function system 9 are, for example, provided
by the manufacturer of the first to third watercraft propulsion
devices 3a to 3c. The devices of the first additional function
system 9 communicate with the central controller 7 using the same
communication interface as is used for communication between the
central controller 7 and the first to third engine ECUs. The
devices of the first additional function system 9 communicate with
the central controller 7 using, for example, CAN protocol. It is
also acceptable for the devices of the first additional function
system 9 to communicate with the central controller 7 using analog
signals. Also, the first additional function system 9 includes an
imaging device 60. The imaging device 60 is, for example, a camera.
The imaging device 60 captures an image and generates electronic
data expressing the image. The word "image" is used here to mean a
photograph or other kind of still image. The imaging device 60 also
captures a moving image and generates electronic data expressing
the moving image. It is also acceptable for the first additional
function system 9 to include other devices in addition to those
already mentioned, e.g., a horn, interior lighting of the
watercraft, or a live well pump for changing water in a live well
provided on the watercraft.
[0090] The second additional function system 10 includes, for
example, an autopilot device 61, a GNSS receiver 62, a wireless
device 63 (two-way radio), and a variety of measurement devices 64.
The autopilot device 61 is a device that holds a set course of the
watercraft 1. If the course deviates from the set direction, the
autopilot device 61 transmits a command signal to the central
controller 7 to revise the course of the watercraft 1. The central
controller 7 controls the first to third watercraft actuators 38a
to 38c or the other devices based on the command signal from the
autopilot device 61. In this way, the course of the watercraft 1 is
automatically revised.
[0091] The GNSS receiver 62 is a receiver for a GPS or other GNSS
(global navigation satellite system) and measures a current
position of the watercraft 1. The wireless device 63 is, for
example, an international VHF wireless (marine VHF radio) device
that accomplishes voice communication using radio waves in a
prescribed frequency band. The measurement devices 64 include a
heading meter 64a, a watercraft speedometer 64b, and a wind
speed/wind direction anemometer 64c. The devices of the second
additional function system 10 are connected to the central
controller 7 through a communication line. The devices of the
second additional function system 10 are third party devices that
are not made by the same manufacturer as the first to third
watercraft propulsion devices 3a to 3c. Thus, the devices of the
second additional function system 10 do not necessarily communicate
with the central controller 7 using the same communication
interface as is used for communication between the central
controller 7 and the first to third engine ECUs 31a. Thus, a
portion of the devices of the second additional function system 10
may communicate with the central controller 7 using a different
communication interface than the communication interface used for
communication between the central controller 7 and the first to
third engine ECUs 31a to 31c. In such a case, the devices of the
second additional function system 10 communicate with the central
controller 7 using a different protocol than the protocol used for
communication between the central controller 7 and the first to
third engine ECUs 31a to 31c. The devices of the second additional
function system 10 communicate with the central controller 7 using,
for example, a NMEA (National Marine Electronics Association)
protocol. It is also acceptable for the devices of the second
additional function system 10 to communicate with the central
controller 7 using the CAN protocol in the same manner as the
devices of the first additional function system 9.
[0092] The central controller 7 defines a portion of a device
network system of the watercraft 1 that also includes a plurality
of devices installed on the watercraft 1. The central controller 7
functions as a network host having a central role in the device
network system. The central controller 7 includes a computing
device 71 such as a CPU or other computing device, a memory 72, a
storage device 73, an output device 74, a first communication
device 75, a second communication device 76, and a third
communication device 77. The storage device 73 is, for example, a
hard disk or a flash memory. It is acceptable for the storage
section 73 to be an SD card, a USB memory, or another external
storage medium. The output device 74 sends an image signal to the
display device 8. If the display device 8 includes a built-in
speaker, then it is acceptable for the output device 74 to send an
audio signal to the display device 8 along with the image
signal.
[0093] The first communication device 75 conducts communications
among the first watercraft propulsion device 3a, the second
watercraft propulsion device 3b, the third watercraft propulsion
device 3c, the steering device 5, the remote control device 6, the
devices of the first additional function system 9, and the devices
of the second additional function system 10. The first
communication device 75 includes a plurality of ports not shown in
the drawings. The plurality of ports are connected to communication
lines from the first to third engine ECUs 31a to 31c, the steering
ECU 47, the remote control ECU 44, the devices of the first
additional function system 9, and the devices of the second
additional function system 10. The first communication device 75
includes a gateway 75a. The devices of the second additional
function system 10 are connected to the central controller 7
through the gateway 75a. The second communication device 76
conducts communication with devices that are external to the device
network of the watercraft 1. The second communication device 76
communicates with the external devices using, for example,
Bluetooth, a wireless LAN, or another specific wireless
communication standard. The external devices are, for example,
mobile terminals 100 such as smart phones and tablets. The third
communication device 77 is for connecting to the internet. The
third communication device 77 conducts communication with a mobile
communication base station 200. For example, the third
communication device 77 connects to the internet using 3G or 4G
mobile communication.
[0094] The display device 8 displays information about the
watercraft in a GUI (graphical user interface) format. The display
device 8 displays information regarding the devices connected to
the central controller 7. The display device 8 is, for example, a
liquid crystal display, an organic EL (electroluminescent) display,
or other type of display. The display device also preferably
includes a touch panel function. An operator can change among the
screens displayed on the display device 8 using a touch panel
function. An operator can also operate the devices explained
previously using the touch panel function. FIG. 4 and FIG. 5 show
an example of a screen displayed on the display device 8. FIG. 4
shows the display device 8 displaying analog gauges 81a to 81c that
indicate engine rotational speeds of the first to third watercraft
propulsion devices 3a to 3c. FIG. 5 shows the display device 8
displaying digital gauges 82a to 82c that indicate engine
rotational speeds of the first to third watercraft propulsion
devices 3a to 3c. The functions provided in the central controller
7 and the display device 8 will now be explained in detail.
[0095] The display device 8 displays an image captured by the
imaging device 60, or the display device 8 displays a moving image
captured by the imaging device 60. The imaging device 60 captures a
moving image of the scenery rearward of the watercraft 1, for
example. The display device 8 displays the moving image captured by
the imaging device 60 in real time. Thus, an operator can use the
image displayed on the display device 8 to check the situation
rearward of the watercraft during, for example, wakeboarding. The
imaging device 60 also captures still images of the scenery
rearward of the watercraft 1. The display device 8 displays images
captured by the imaging device 60.
[0096] The still images and moving images captured by the imaging
device 60 are stored in the storage device 73 as digital data. As a
result, still images and moving images of people wakeboarding or
doing other recreational activities behind the watercraft 1 can be
stored. The central controller 7 can also transmit digital data
stored in the storage device 73 to an external mobile terminal 100
through the second communication device 76. As a result, the still
images and moving images stored in the storage device 73 can be
uploaded readily to a social networking service (SNS), a blog, or a
video sharing service.
[0097] It is also acceptable for the imaging device 60 to capture a
moving image of the scenery in another direction other than the
rearward direction of the watercraft 1 and for the display device 8
to display the moving image captured by the imaging device 60 in
real time. In such a case, an operator can use the image displayed
on the display device 8 to check the situation in a direction where
visibility is poor from the helm seat 4. In this way, the
visibility around the perimeter of the watercraft 1 can be
improved. It is also acceptable for the imaging device 60 to
capture a still image of the scenery in another direction other
than the rearward direction of the watercraft 1.
[0098] Additionally, the central controller 7 monitors the water
surface for obstacles using the still images and moving images
captured by the imaging device 60. The central controller 7
determines if an obstacle exists by executing image processing of
the still images and moving images captured by the imaging device
60. The central controller 7 also notifies the operator if it
determines that an obstacle exists. For example, as shown in FIG.
6, the central controller 7 attaches a mark 84 to the obstacle on
the screen 83 displayed on the display device 8 to notify the
operator. It is also acceptable to notify the operator by emitting
a warning sound from the speaker 58.
[0099] Since the electronic data of the still images and moving
images captured by the imaging device 60 are stored in the storage
device 73, the imaging device 60 and the central controller can be
used as a drive recorder. A drive recorder is a device that records
a moving image or a still image captured at the moment when an
accident occurs. When it detects information serving as a trigger
while the watercraft is traveling, the central controller 7 stores
a moving image or still image captured by the imaging device 60.
Information serving as a trigger is information with which one can
assume an accident has occurred, e.g., detection of an impact
against the watercraft 1. Another example of information serving as
a trigger is a sudden operation of the steering device 5 or the
remote control device 6.
[0100] As shown in FIG. 7, the watercraft 1 is sometimes carried to
an ocean or a lake using an automobile 300 and a trailer 301 and
put into the water using a ramp. In such a case, since an operator
needs to visually check the surrounding perimeter of the watercraft
1 for safety, it is difficult for the operator to prepare for
launching alone.
[0101] With the present preferred embodiment, the central
controller 7 can communicate with a car navigation system installed
in the automobile 300 using a wireless or wired communication
device and transmit a still image or a moving image captured by the
imaging device 60 to the car navigation system 302. FIG. 8 shows a
screen 303 displayed on the car navigation system 302. As shown in
FIG. 8, the central controller 7 processes an image of a region
surrounding the watercraft 1 captured by the imaging device 60 and
synthesizes a bird's eye view showing the watercraft 1 from above.
The central controller 7 transmits electronic data for the bird's
eye view image to the car navigation system 302. In this way, an
operator can check the state of the watercraft 1 from the driver's
seat of the automobile 300 while placing the watercraft 1 into the
water. Instead of a bird's eye image, it is also acceptable for the
central controller 7 to transmit an image showing a perimeter of
the watercraft 1 from another perspective--particularly an image
showing a region rearward of the watercraft 1--to the car
navigation system 302 of the automobile 300.
[0102] The devices can be operated by performing touch operations
using the touch panel function of the display device 8. More
specifically, as shown in FIG. 9, the display device 8 displays
software keys. For example, an operator taps or drags the software
keys to operate the devices.
[0103] The software keys include a main switch 85, a first
start/stop switch 86a, a second start/stop switch 86b, and a third
start/stop switch 86c. The main switch 85 is a switch for turning
on and off a power source that powers the entire device network
system of the watercraft 1. The first start/stop switch 86a is a
switch to start and stop the engine 12a of the first watercraft
propulsion device 3a. The second start/stop switch 86b is a switch
to start and stop the engine of the second watercraft propulsion
device 3b. The third start/stop switch 86c is a switch to start and
stop the engine of the third watercraft propulsion device 3c.
[0104] The software keys include a speed fine adjusting switch 87.
An operator can operate the speed fine adjusting switch 87 to
finely adjust the engine rotational speed. The speed fine adjusting
switch 87 includes an UP switch 87a and a DOWN switch 87b. When the
UP switch 87a is tapped once, the engine rotational speed increases
by a prescribed rotational speed. When the DOWN switch 87b is
tapped once, the engine rotational speed decreases by a prescribed
rotational speed.
[0105] The software keys include operating switches that operate
the devices of the first additional function system 9 and operating
switches that operate the devices of the second additional function
system 10. For example, the software keys include a bilge switch
88a, a wiper switch 88b, and a blower switch 88c. The operator can
switch the bilge pump 54, the wiper 51, the blower 52, and other
devices on and off by operating these switches. Thus, as shown in
FIG. 9, software keys that operate a plurality of different devices
are displayed on the same screen.
[0106] These software keys include a mode changing switch 89. The
mode changing switch 89 is a switch that changes a display mode. By
operating the mode changing switch 89, the operator can change the
screen displayed on the display device 8. For example, the mode
changing switch 89 can be used to change to another operating
screen that includes software keys that operate other devices.
[0107] It is also acceptable for control mode switches that switch
control modes executed by the first to third engine ECUs 31a to 31c
to be displayed. Examples of control mode switches include a
no-wake mode switch and a cruise control switch. A no-wake mode is
a control contrived to execute a low-speed travelling state while
maintaining a predetermined engine rotational speed. When the
no-wake mode switch is turned on, the central controller 7 sends a
command signal to the first to third engine ECUs 31a to 31c
requesting the no-wake mode to be executed. A cruise control is a
control contrived to hold the engine at a rotational speed that
existed when the cruise control switch was operated. When the
cruise control switch is turned on, the central controller 7 sends
a command signal to the first to third engine ECUs 31a to 31c
requesting the cruise control to be executed.
[0108] As explained previously, the switches that operate the
devices are displayed as software keys on the display device 8.
Thus, the number of parts of the watercraft 1 can be reduced
because mechanical switches can be omitted. As a result, the
manufacturing cost can be reduced and space can be conserved. Also,
since the number and design of the software keys can be changed by
changing the program, watercrafts 1 having different specifications
can be accommodated easily using the same hardware. Furthermore,
unlike mechanical switches, the software keys do not degrade when
exposed to rain and water droplets resulting from splashing during
operation of the watercraft. As a result, the reliability of the
operated devices is improved. The central controller can
communicate with a plurality of devices having different protocols.
Consequently, when, for example, the watercraft is equipped with a
third party device that uses a different protocol from the protocol
used by the standard devices provided, the software keys displayed
on the display device 7 enable these devices to be operated without
increasing the number of mechanical switches.
[0109] The watercraft 1 can be piloted using the touch panel
function of the display device 8. More specifically, as shown in
FIG. 10, the display device 8 displays software keys. The software
keys include direction keys 91. The direction keys 91 are keys that
move the watercraft 1 laterally and longitudinally and include a
plurality of keys corresponding to different movement directions of
the watercraft 1. The "lateral movement` of the watercraft 1 means
translational movement of the watercraft 1 in a leftward or a
rightward direction and is used when, for example, when berthing.
In FIG. 10, the direction keys 91 are direction buttons. More
specifically, the direction buttons include a left button 91L and
aright button 91R. When the operator operates the left button 91L
or the right button 91R, the central controller 7 controls side
thruster 56 and the first to third watercraft propulsion devices 3a
to 3c such that the watercraft 1 moves in the specified direction.
The software keys also include a forward button 91F and a reverse
button 91B. When the operator operates the forward button 91F or
the reverse button 91B, the central controller 7 controls the side
thruster 56 and the first to third watercraft propulsion devices 3a
to 3c such that the watercraft 1 moves in the specified
direction.
[0110] The software keys also include rotation keys 92. The
rotation keys 92 are keys that rotate (pivoting) the watercraft 1
while remaining in place. In FIG. 10, the rotation keys 92 are
rotation buttons. The rotation buttons include a right rotation
button 92R and a left rotation button 92L. The right rotation
button 92R is a button used to rotate the watercraft 1 rightward
while remaining in place. The left rotation button 92L is a button
used to rotate the watercraft 1 leftward while remaining in place.
When the operator operates one of the rotation buttons, the central
controller 7 controls the side thruster 56 and the first to third
watercraft propulsion devices 3a to 3c such that the watercraft 1
rotates in the specified direction.
[0111] Instead of direction buttons 91L, 91R, 91F, 91B and rotation
buttons 92L and 92R, it is acceptable to display an operating icon
93 that indicates the watercraft 1 as shown in FIG. 11. The
operator can drag the operating icon 93 and slide it left and
right. In response, the central controller 7 controls the side
thruster 56 and the first to third watercraft propulsion devices 3a
to 3c such that the watercraft 1 moves in a direction corresponding
to the sliding direction of the operating icon 93. Also, the
operator can drag the operating icon 93 such that it rotates
rightward or leftward while remaining in place. In response, the
central controller 7 controls the side thruster 56 and the first to
third watercraft propulsion devices 3a to 3c such that the
watercraft 1 rotates in a direction corresponding to the rotation
direction of the operating icon 93 while remaining in place.
[0112] Instead of the direction buttons 91L, 91R, 91F, and 91B, it
is acceptable to display a direction lever 94 as shown in FIG. 12.
Instead of the rotation buttons 92L and 92R, it is also acceptable
to display a rotation lever 95. The direction lever 94 and the
rotation lever 95 are both lever shaped operating icons. The
operator can drag the direction lever 94 and move it in any of the
forward, reverse, left, and right directions. When the operator
operates the direction lever 94, the central controller 7 controls
the side thruster 56 and the first to third watercraft propulsion
devices 3a to 3c such that the watercraft 1 moves in the specified
direction. Also, the operator can drag the rotation lever 95 such
that it moves rightward or leftward in a circular fashion. When the
operator operates the direction lever 95, the central controller 7
controls the side thruster 56 and the first to third watercraft
propulsion devices 3a to 3c such that the watercraft 1 rotates in
the specified direction.
[0113] With a conventional watercraft, a joystick or other separate
operating device needs to be installed in the watercraft 1 in order
to execute translational movement of the watercraft 1 or rotation
while remaining in place. With the watercraft 1 according to the
present preferred embodiment, the watercraft 1 can be moved
translationally and rotated in place using the software keys
displayed on the display device 8. Consequently, it is not
necessary to provide a separate operating device and the
manufacturing cost can be reduced. Also, since the number and
design of the software keys can be changed by changing the program,
watercrafts 1 having different specifications can be accommodated
easily using the same hardware. Furthermore, unlike mechanical
switches, the software keys do not degrade when exposed to rain and
water droplets resulting from splashing during operation of the
watercraft. As a result, the reliability of the operated devices is
improved.
[0114] As explained previously, the central controller 7 can
communicate with an external mobile terminal 100 through the second
communication device 76. The central controller 7 communicates with
the mobile terminal 100 and thereby acquires screen data displayed
on a display of the mobile terminal 100. The central controller 7
then displays the same screen as is displayed on the display of the
mobile terminal 100 on the display device 8 based on the acquired
screen data. Thus, the display device 8 can display a screen of an
application opened on the mobile terminal 100. The central
controller 7 can also transmit a command signal generated by a
touch operation of the display device 8 to the mobile terminal 100.
The mobile terminal 100 executes control of the application based
on the command signal from the central controller 7. In this way,
an operator can operate the application of the mobile terminal 100
by executing touch operations on the display device 8.
[0115] FIG. 13 shows an example of a screen displayed on the
display device 8. As shown in FIG. 13, the display device 8 shows
an application list screen 96a that is the same as the screen
displayed on the display of the mobile terminal 100. An operator
can open a desired application by tapping the icon of the
application displayed on the display device 8. For example, FIG. 14
shows an operating screen 96b that is displayed when a music player
application is opened. The same as the display of the mobile
terminal 100, the display device 8 shows a playlist screen. An
operator can select a desired music track by tapping the song name
in the list displayed on the display device 8. When an operator
selects a song by touching the display device 8, the central
controller 7 transmits a command signal to the mobile terminal 100.
As a result, the mobile terminal 100 plays back the selected song.
It is also acceptable for the mobile terminal 100 to transmit music
data for the selected song to the central controller 7 such that
the music is played through the speaker 58 of the watercraft 1. The
display device 8 is not limited to playing back music and can also
display images and videos stored in the mobile terminal 100.
[0116] With the watercraft 1 according to the present preferred
embodiment, since the central controller 7 can communicate with the
external mobile terminal 100 as explained previously, the external
mobile terminal 100 can be readily incorporated into the network of
the watercraft 100. As a result, the functions of the mobile
terminal 100 can be used readily aboard the watercraft 1. Although
it is not easy to operate a mobile terminal 100 on a watercraft 1
that rocks severely and easily becomes wet, the mobile terminal 100
can be operated easily using the display device 8.
[0117] The communication between the central controller 7 and the
external mobile terminal 100 is not limited to wireless
communication and it is acceptable to communicate through a wired
connection. For example, it is acceptable for the central
controller 7 and the mobile terminal 100 to be connected through a
USB or other wired communication interface.
[0118] The central controller 7 can also communicate with external
hands free phones 101 and 102 (see FIG. 3) through the second
communication device 76. The hands free phones 101 and 102 are
headsets and each includes a microphone and an earphone. It is
acceptable for the central controller 7 to communicate with three
or more hands free phones. The central controller 7 relays audio
data between the hands free phones 101 and 102. That is, the
central controller 7 can take audio information inputted to a
microphone of one hands free phone and output it from a speaker of
another hands free phone. Thus, using the hands free phones,
passengers inside the watercraft and on deck can converse
comfortably with each other while the watercraft is moving even in
the presence of wind and engine noise. In contrast to using a
conventional transceiver, the present preferred embodiment enables
a common hands free phone compatible with a specific wireless
communication standard to be used and, thus, enables the system to
be constructed inexpensively. It is also acceptable to use a mobile
telephone or other device compatible with the specific wireless
communication standard.
[0119] It is also acceptable for the central controller 7 to issue
a warning sound notifying of trouble from the speakers of the hands
free phones 101 and 102 when it detects trouble from at least one
of the aforementioned plurality of devices. For example, the
central controller 7 might issue a warning sound notifying of
trouble from the speakers of the hands free phones 101 and 102 when
it detects trouble in the engine 12a. It is acceptable for the
central controller 7 to play music stored in the storing device 73
through the speakers of the hands free phones 101 and 102. It is
also acceptable for the central controller 7 to play music stored
in a mobile terminal 100 through the speakers of the hands free
phones 101 and 102. It is also acceptable to play audio from an
application running on the mobile terminal 100 through the speakers
of the hands free phones 101 and 102. It is also acceptable for the
central controller 7 to play an operation confirmation sound
through the speakers of the hands free phones 101 and 102 to
confirm a switch operation of at least one of the previously
explained devices. It is acceptable for the switch to be a software
key displayed on the display device 8. It is also acceptable for
the switch to be a mechanical switch.
[0120] As shown in FIG. 15, the watercraft 1 is preferably provided
with a water protective case 97. The mobile terminal 100 is stored
inside the water protective case 97. As shown in FIG. 1, the water
protective case 97 is arranged in a location peripheral to the helm
seat 4. The water protective case 97 is preferably arranged where
it can be reached from the driver's seat. It is also acceptable to
arrange the water protective case where it can be reached from a
passenger's seat. The second communication device 76 is arranged in
a position where it can communicate in a stable fashion with the
mobile terminal 100 stored in the water protective case 97. The
second communication device 76 is arranged, for example, below the
water protective case 97 as shown in FIG. 15. A charging device 98
is preferably arranged between the mobile terminal 100 and the
second communication device 76. The charging device 98 preferably
includes a wireless charging function. That is, the charging device
98 is a non-contact type charger that can charge the mobile
terminal 100 when the mobile terminal 100 is merely placed on the
charging device 98. The water protective case 97 is preferably made
of a transparent material. As a result, the mobile terminal 100
inside the water protective case 97 can be checked from the
outside. It is acceptable for the water protective case 97 to be
arranged using an existing storage compartment arranged on the
watercraft 1. It is also acceptable for the water protective case
97 to be detachable. Furthermore, it is acceptable for the second
communication device 76 to be a wired communication device
including a connecting portion that extends into the interior of
the water protective case 97 and connects to the mobile terminal
100. It is also acceptable for the charging device 98 to be a wired
charging device including a connecting portion that extends into
the interior of the water protective case 97 and connects to the
mobile terminal 100.
[0121] As shown in FIG. 16, a key 99 held by the user of the
watercraft 1 includes a GNSS receiver 99a and a communication
device 99b to communicate with an external communication network.
The GNSS receiver 99a detects a current position of the key 99 and
the communication device 99b transmits the current position
information through the external communication network, e.g., the
internet IN, to the central controller 7 of the watercraft 1. More
specifically, the communication device 99b communicates with the
base station 200 and transmits the current position information of
the key 99 to a management server 201 contained in the internet IN.
The central controller 7 receives the current position information
of the key 99 from the management server 201 through the base
station 200. The central controller 7 calculates a distance between
the watercraft 1 and the key 99 based on current position
information detected by the GNSS receiver 62 (see FIG. 3) of the
watercraft 1 and the current position information detected by the
GNSS receiver 99a of the key 99. The central controller 7 limits at
least a portion of the functions of the watercraft 1 when the
watercraft 1 and the key are separated by a distance larger than a
prescribed threshold value. For example, the central controller 7
might prohibit starting the engines of the first to third
watercraft propulsion devices 3a to 3c. Or, the central controller
7 might restrict the engines of the first to third watercraft
propulsion devices 3a to 3c to a lower than normal output.
[0122] A maintenance program for performing maintenance of the
devices is stored in the storage device 73. The central controller
7 can perform maintenance of the devices based on information
received from the devices and based on the maintenance program. The
display device 8 can display a screen for maintenance of the
watercraft 1, and the maintenance program executes, for example,
failure diagnostics, maintenance inspections, and settings of the
devices. The operator can operate the maintenance program by
performing touch operations on the display device 8. FIG. 17 shows
a maintenance screen 66 for the watercraft 1 displayed on the
display device 8. Each of the first to third engine ECUs 31a to 31c
stores an operating record for the engine of the respective first
to third watercraft propulsion device 3a to 3c. The engine
operation record includes a total operation time of the engine. The
engine operation record also includes such information as the
throttle opening degree, the intake air pressure, and the
rotational speed of the engine that existed when trouble occurred
in the engine. The maintenance program performs failure diagnostics
of the engines of the first to third watercraft propulsion devices
3a to 3c based on the engine operation records.
[0123] With the watercraft 1 according to the present preferred
embodiment, the central controller 7 can perform maintenance of the
devices using the maintenance program. As a result, such
maintenance operations such as failure diagnostics, maintenance
inspections, and settings of the devices can be accomplished
without connecting a separate computer installed with the
maintenance program to each of the first to third watercraft
propulsion devices 3a to 3c, as would be the case in a conventional
watercraft. Since the central controller 7 is positioned at the
center of the device network system of the watercraft 1, the
central controller 7 can readily execute diagnostics, maintenance
checks, and settings of the entire device network system of the
watercraft 1.
[0124] A settings program for initializing the settings of the
devices is stored in the storage device 73. The central controller
7 can initialize the settings of the devices based on the settings
program. The display device 8 can display a screen used to
initialize the settings of the watercraft 1, and the settings
program executes settings such as, for example, position settings
of the first to third watercraft propulsion devices 3a to 3c, zero
point calibration of the watercraft speedometer 64b, setting the
tilt limiter, and an authorization reset of the immobilizer. The
position settings of the first to third watercraft propulsion
devices 3a to 3c involves setting which of the first to third
watercraft propulsion devices 3a to 3c is arranged in each of the
starboard, port, and middle positions. The tilt limiter setting
sets an upper limit position for tilting up. FIG. 18 shows a tilt
limiter setting screen 67. From the tilt limiter setting screen, an
operator sets the upper limit position for tilting the watercraft
propulsion devices. For example, when the watercraft 1 will be
stored in the water, the operator operates the first to third
tilt/trim actuators 37a to 37c and tilts the first to third
watercraft propulsion devices 3a to 3c upward to the upper limit
position. In this way, the propellers of the first to third
watercraft propulsion devices 3a to 3c are lifted out of the water.
The immobilizer authorization reset is a process that initializes
an ID code of an immobilizer receiver 65a explained below. The
operator can operate the settings program by performing touch
operations on the display device 8.
[0125] In a conventional watercraft, the device initialization
settings explained above are accomplished using different tools for
each of the devices. With the watercraft 1 according to the present
preferred embodiment, initialization settings of the devices can be
accomplished by the central controller 7. Thus, initialization
settings of a plurality of devices can be accomplished in a
centralized manner by the central controller 7. As a result, an
operator can perform initialization settings of the devices easily.
Moreover, different specifications can be accommodated easily by
changing the setting program.
[0126] It is also acceptable to use the settings program to
customize the settings of the devices. For example, settings of the
first to third propulsion devices 3a to 3c can be set to achieve a
watercraft speed versus engine output torque characteristic in
accordance with the operator's preferences. More specifically, a
fishing boat operator may prefer a large torque output at a low
speed because a fishing boat often carries heavy loads. By
customizing the settings of the devices using the setting program,
the operator can set the devices as desired.
[0127] As shown in FIG. 3, the watercraft 1 is provided with an
immobilizer receiver 65a. The immobilizer receiver 65a is arranged
in the display device 8. The key held by the operator includes an
immobilizer transmitter 65b. The immobilizer receiver 65a receives
an ID code stored in the immobilizer transmitter 65b. The central
controller 7 determines if the ID code from the immobilizer
transmitter 65d matches the ID code of the immobilizer receiver 65a
set in advance in the central controller 7. If the ID code of the
immobilizer transmitter 65b does not match the ID code set in the
central controller 7, then the central controller 7 prohibits the
engines of the first to third watercraft propulsion devices 3a to
3c from being started. If the ID code of the immobilizer
transmitter 65b does match the ID code set in the central
controller 7, then the central controller 7 allows the engines of
the first to third watercraft propulsion devices 3a to 3c to be
started.
[0128] In the watercraft 1 according to the present preferred
embodiment, the immobilizer receiver 65a is arranged on the display
device 8. Thus, the immobilizer receiver 65a is arranged in a fixed
location where it can be seen from the helm seat 4. As a result,
the reception sensitivity and reception range of the immobilizer
receiver 65a can be stabilized.
[0129] The central controller 7 determines a water depth based on a
signal from the sonar 53. The central controller also determines if
an obstacle exists in the water based on a signal from the sonar
53. The display device 8 displays information regarding an obstacle
in the water based on the signal from the sonar 53. If it detects
an obstacle in the water, then the central controller 7 displays a
warning on the display device 8.
[0130] The central controller also displays fish school information
on the display device 8 based on the signal from the sonar 53. FIG.
19 shows a screen 68a of the fish finder function displayed on the
display device 8. The fish finder screen 68a displays fish school
information indicating a position of a fish school in the water
below the watercraft 1. Additionally, as shown in FIG. 19, the
central controller 7 displays a navigation screen 68b on the
display device 8 based on a current position detection signal from
the GNSS receiver 62. The navigation screen 68b includes a map
indicating the current position of the watercraft 1. Operating
buttons 68c for the fish finder function and the navigation
function are displayed on the display device 8 as software keys.
Although the fish finder screen 68a and the navigation screen 68b
are preferably combined into one unit in FIG. 19, it is acceptable
to display them separately.
[0131] In the case of a watercraft 1 used by a boat rental
business, it is possible to install a rental management function
into the central controller 7. The rental management function
displays rental management information regarding the watercraft 1
on the display device 8. The rental management information
includes, for example, information regarding an amount of fuel used
by the watercraft 1 and information regarding a rental time amount
of the watercraft 1. In such a case, the devices of the first
additional function system 9 include a fuel flow meter 59a (see
FIG. 3). The central controller 7 displays information regarding
the amount of fuel used by the watercraft 1 on the display device 8
based on a fuel usage amount measured by the fuel flow meter 59a.
FIG. 20 shows a rental management screen 69 displayed on display
device 8. The rental management screen 69 contains rental
management information. The rental management information includes
information 69a indicating the remaining fuel amount and
information 69b indicating the remaining rental time. The rental
management information also includes position information 69c of
the watercraft 1. The position information 69c of the watercraft 1
is acquired by the GNSS receiver 62. The rental management
information is transmitted to a computer in a management office of
the boat rental business by communicating through the wireless
device 63 or the internet. As a result, the rental management
information can be utilized for smooth operation of the boat rental
business. Also, the operator of the watercraft 1 can contact the
management office through the watercraft radio or the internet. In
this way, the management office can respond quickly when trouble
occurs during a rental of the watercraft 1.
[0132] The central controller 7 can connect to the internet. Thus,
the central controller 7 can execute various functions through the
internet. For example, the central controller 7 can be configured
to send and receive email, to send and receive still images and
moving images, and to conduct TV phone calls. With these functions,
the operator can communicate easily with operators of other
vessels. As a result, the operator can communicate information
regarding the state of his or her own vessel or information
regarding fishing results to the operator of another vessel in real
time. The operator can also communicate with the operator of the
other vessel using video instead of only audio. It is acceptable
for voice communication with the operator of another vessel through
a TV phone or the like to be conducted using the aforementioned
hands free phones 101 and 102. Instead of connecting to the
Internet, it is acceptable for voice communication to be conducted
using the hands free phones 101 and 102 through the central
controller 7 and the wireless device 63.
[0133] An operator can download a manual for the watercraft 1 to
the central controller 7 by accessing a server of the company that
manufactures or sells the watercraft 1 through the internet. The
operator can view the downloaded manual using the display device 8.
As a result, if trouble occurs during preparation for launching or
during operation, the operator can easily refer to the manual.
[0134] Instead of the aforementioned immobilizer function, it is
acceptable to provide a smart key function in the watercraft 1. In
such a case, the devices include a smart key system 70 as shown in
FIG. 21. The smart key system 70 includes a receiver 70a arranged
on the watercraft 1 and a portable transmitter 70b. Similar to the
previously explained immobilizer receiver 65a, the receiver 70a is
preferably arranged on the display device 8. The central controller
7 determines if the distance between the receiver 70a and the
transmitter 70b is equal to or below a prescribed distance. If it
determines that the distance between the receiver 70a and the
transmitter 70b is equal to or smaller than the prescribed
distance, then the central controller 7 allows the engines of the
first to third watercraft propulsion devices 3a to 3c to be started
and displays start switches (see 86a to 86c in FIG. 9) for the
engines of the first to third watercraft propulsion devices 3a to
3c on the display device 8. That is, the start switches are
displayed on the display device 8 automatically when the operator
holds the transmitter 70b and the operator gets near the helm seat
4 of the watercraft 1. Thus, the operator can start the engines by
performing touch operations on the display device 8 without
operating the key. As a result, the operator can avoid the trouble
of pulling out the key. The operator can also avoid the process of
inserting and turning the key. The main switch 85 (see FIG. 9) is
also displayed together with the start switches. Thus, if the
engines will not be started, the operator can turn the power supply
to the entire device network system of the watercraft 1 off
manually by operating the main switch 85. It is also acceptable for
the main switch 85 to turn on automatically when the distance
between the receiver 70a and the transmitter 70b is equal to or
smaller than the prescribed distance. Thus, the operator can avoid
turning the main switch 85 on.
[0135] FIG. 22 is simple diagram showing constituent features of a
device network system installed in a watercraft 1 according to
another preferred embodiment of the present invention. This device
network system includes a central control unit 20. The central
control unit 20 is a device in which the central controller 7 and
the display device 8 of the first preferred embodiment are
preferably integrated into a single unit. That is, the central
control unit 20 includes a common case for the central controller 7
and the display device 8. The central controller 7 and the display
device 8 are both housed in this case. Otherwise, the constituent
features of the watercraft according to the present preferred
embodiment are preferably the same as the watercraft 1 according to
the first preferred embodiment.
[0136] Although preferred embodiments of the present invention are
explained herein, the present invention is not limited to these
preferred embodiments. Various changes can be made without
departing from the scope of the present invention.
[0137] It is acceptable for the watercraft propulsion devices to be
inboard motors or water jet propulsion devices instead of outboard
motors. FIG. 23 is a side cross sectional view showing the
structure of a water jet propulsion device 400. The water jet
propulsion device 400 is driven by an engine or other power source
and draws in water from around the watercraft. As shown in FIG. 23,
the water jet propulsion unit 400 includes an impeller shaft 401,
an impeller 402, a nozzle 403, a deflector 404, and a reverse
bucket 405. A frontward portion of the impeller shaft 401 is
coupled to an output shaft of the power source (not shown) through
a coupling section 406. A rearward portion of the impeller shaft
401 passes through a water suction section 407 of the watercraft
and out through the inside of the impeller housing 408. The
impeller housing 408 is connected to a rearward portion of the
water suction section 407. The nozzle 403 is arranged rearward of
the impeller housing 408. The impeller 402 is attached to a
rearward portion of the impeller shaft 401. The impeller 402 is
arranged inside the impeller housing 408. The impeller 402 rotates
together with the impeller shaft 401 and draws in water from the
water suction section 407. The impeller 402 jets the drawn water
rearward from the nozzle 403. The deflector 404 is arranged
rearward of the nozzle housing 403. The deflector 404 is configured
to change a movement direction of water jetted from the nozzle 403
to a leftward or a rightward direction. The reverse bucket 405 is
arranged rearward of the deflector 404. The reverse bucket 405 is
arranged to change the movement direction of water jetted from the
nozzle 403 and the deflector 404 to a frontward direction. It is
acceptable if the watercraft is a sport boat or a PWC (personal
watercraft) equipped with a water jet propulsion device. FIG. 24 is
a plan view of a sport boat 500. The sport boat 500 includes a
first engine 501a, a first engine ECU 502a, a first water jet
propulsion device 503a, a second engine 501b, a second engine ECU
502b, and a second water jet propulsion device 503b. The first
water jet propulsion device 503a is driven by the first engine
501a. The first engine ECU 502a controls the first engine 501a. The
second water jet propulsion device 503b is driven by the second
engine 501b. The second engine ECU 502b controls the second engine
501b. The constituent features of the first and second engines 501a
and 501b and the first and second engine ECU's 502a and 502b are
substantially the same as the constituent features of the engine
12a and the first engine ECU 31a of the previously explained first
preferred embodiment. The first and second water jet propulsion
devices 503a and 503b include the same constituent features as the
previously explained water jet propulsion device 400. The sport
boat 500 includes a driver's seat 504 and a passenger seat 505. A
steering operating member 506 is arranged frontward of the driver's
seat 504. A remote control device 507 is arranged to a side of the
driver's seat 504. The constituent features of the steering
operating member 506 and the remote control device 507 are
substantially the same as the constituent features of the steering
operating member 45 and the remote control device 6 of the first
preferred embodiment. A display device 508 and a central controller
509 are arranged frontward of the driver's seat 504. The central
controller 509 executes centralized control of devices installed on
the sport boat 500. For example, the central controller 509
communicates with the first and second engine ECUs 502a and 502b
and controls the first engine 501a and the second engine 501b. The
central controller 509 controls the first water jet propulsion
device 503a and the second water jet propulsion device 503b. The
display device 508 communicates with the central controller 509 to
display information regarding sport boat 500 in a GUI format. The
constituent features of the display device 508 and the central
controller 509 are substantially the same as the constituent
features of the display device 8 and the central controller 7 of
the first preferred embodiment.
[0138] FIG. 25 is a side view of a PWC 600. As shown in FIG. 25,
the PWC 600 includes a watercraft body 601, a seat 602, an
operating handle 603, and a central controller 604. The watercraft
body 601 houses an engine and a jet propulsion device that are not
shown in the drawing. The seat 602 is attached to the watercraft
body 601. The operating handle 603 is arranged frontward of the
seat 602. One passenger 610 riding the PWC 600 can use a hands free
phone 101 (see FIG. 3) to converse comfortably with another
passenger 611 wearing another hands free phone 102 (see FIG. 3). As
shown in FIG. 25, the hands free phone 102 is worn by a passenger
611 sitting on a rearward portion of the seat 602 of the same PWC
600. It is also acceptable for the hands free phone 102 to be worn
by a passenger on another PWC.
[0139] Although in the previously explained preferred embodiments
the watercraft 1 preferably includes three watercraft propulsion
devices 3a to 3c, the number of watercraft propulsion devices is
not limited to three. It is acceptable to equip the watercraft with
two or fewer watercraft propulsion devices or with four or more
watercraft propulsion devices, for example. Although in the
previously explained preferred embodiments an engine was used
preferably as the power source, it is acceptable to use an electric
motor as the power source.
[0140] In the first preferred embodiment, it is acceptable for the
display device 8 to be detachable from the central controller 7. In
such case, it is preferable for the display device 8 to be able to
communicate with the central controller 7 through a wireless
communication interface, such as a wireless LAN or Bluetooth. In
this way, the devices of the watercraft 1 can be operated from
outside the watercraft 1. For example, an operator on land can
pilot the watercraft 1 remotely using the same software key
function as previously explained above. An operator can also pilot
the watercraft 1 from a place within the watercraft 1 other than
the helm seat 4.
[0141] In the previously explained preferred embodiments, the
central controller 7 and the devices are preferably connected with
a communication line. However, it is acceptable to connect the
central controller 7 and the devices wirelessly. For example, it is
acceptable for a wireless communication interface (e.g., a wireless
LAN) to be provided between the central controller 7 and each of
the first to third engine ECUs 31a to 31c such that data is
exchanged wirelessly. In such a case, the number of wires can be
reduced because a communication harness can be omitted. As a
result, the rigging can be simplified. It is also acceptable for
the communication between the central controller 7 and the devices
to be accomplished using analog signals. It is also acceptable for
the central controller 7 to communicate with the devices through
wired connections using a protocol such as CAN or NMEA. It is also
acceptable for the central controller 7 to communicate with the
devices wirelessly using, for example, a wireless LAN.
[0142] In the previously explained preferred embodiments, each of
the devices is equipped with a controller and the central
controller 7 communicates with the controllers of the devices.
However, it is also acceptable for the central controller 7 to
serve as the controllers of the devices. For example, it is
acceptable for the central controller 7 to also function as the
remote control ECU 44. It is also acceptable for the central
controller 7 to function as the steering ECU 47.
[0143] Although in the previously explained preferred embodiments
the central controller 7 includes a fish finder function that uses
a detection signal from the sonar 53, it is acceptable to provide a
fish finder device separate from the sonar 53. In such a case, the
central controller 7 would communicate with a controller of the
fish finder device.
[0144] Although in the previously explained preferred embodiments
the central controller 7 can connect to the internet preferably
through the third communication device 77, it is acceptable if the
central controller 7 can connect to the internet through the mobile
terminal 100. For example, it is acceptable for the central
controller 7 to use a tethering function of the mobile terminal 100
to connect to the internet.
[0145] Regarding the function of communicating using external
devices, it is acceptable to omit the previously explained display
device 8 because it is not mandatory.
[0146] It is acceptable for the central controller 7 to control
movement of the watercraft 1 based on touch panel operations
performed on the mobile terminal 100. In such a case, the mobile
terminal 100 displays software keys in the same manner as explained
above. The operator can control movements of the watercraft 1 by
operating the software keys displayed on the screen of the mobile
terminal 100.
[0147] It is acceptable for the central controller 7 to control
movement of the watercraft 1 based on tilting of the mobile
terminal 100. If the mobile terminal 100 includes, for example, a
gyroscopic sensor, an acceleration sensor, or another sensor that
detects tilting, then tilting of the mobile terminal 100 itself can
be detected. The mobile terminal 100 transmits a signal indicating
the tilt of the mobile terminal 100 to the central controller 7. In
response, the central controller 7 controls the side thruster 56
and the first to third watercraft propulsion devices 3a to 3c such
that the watercraft 1 moves in the same direction as the tilt
direction of the mobile terminal 100. For example, when the mobile
terminal 100 is tilted in any of the forward, rearward, rightward,
or leftward directions, the central controller 7 controls the side
thruster 56 and the first to third watercraft propulsion devices 3a
to 3c such that the watercraft 1 moves in the same direction as the
tilt direction of the mobile terminal 100. Similarly, when the
mobile terminal 100 is tilted such that it rotates rightward or
leftward, the central controller 7 controls the side thruster 56
and the first to third watercraft propulsion devices 3a to 3c such
that the watercraft 1 rotates in place in the same direction as the
rotation direction of the mobile terminal 100.
[0148] While preferred embodiments of the present invention have
been described above, it is to be understood that variations and
modifications will be apparent to those skilled in the art without
departing from the scope and spirit of the present invention. The
scope of the present invention, therefore, is to be determined
solely by the following claims.
* * * * *