U.S. patent application number 12/194932 was filed with the patent office on 2008-12-18 for system and method of simulation.
This patent application is currently assigned to Lockheed Martin Corporation. Invention is credited to John M. Hogan, C. Gil Young.
Application Number | 20080309506 12/194932 |
Document ID | / |
Family ID | 38985597 |
Filed Date | 2008-12-18 |
United States Patent
Application |
20080309506 |
Kind Code |
A1 |
Young; C. Gil ; et
al. |
December 18, 2008 |
System and Method of Simulation
Abstract
A simulation system includes a two-dimensional electrical grid
installed in a floor or floor mat. Signals from boot mounted
transmitters can be sensed via the grid to track boot locations in
real-time during training exercises.
Inventors: |
Young; C. Gil; (Winter Park,
FL) ; Hogan; John M.; (Winter Springs, FL) |
Correspondence
Address: |
Husch Blackwell Sanders, LLP;Welsh & Katz
120 S RIVERSIDE PLAZA, 22ND FLOOR
CHICAGO
IL
60606
US
|
Assignee: |
Lockheed Martin Corporation
Orlando
FL
|
Family ID: |
38985597 |
Appl. No.: |
12/194932 |
Filed: |
August 20, 2008 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
11460301 |
Jul 27, 2006 |
|
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12194932 |
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Current U.S.
Class: |
340/666 |
Current CPC
Class: |
A63B 69/004 20130101;
G09B 9/006 20130101; G01S 5/02 20130101 |
Class at
Publication: |
340/666 |
International
Class: |
G08B 21/00 20060101
G08B021/00 |
Claims
1. A tracking structure comprising: a two-dimensional substantially
planar grid; and at least one wireless identification unit, which
when located adjacent to a region of the grid induces an electrical
signal therein.
2. A structure as in claim 1 where the grid incorporates a first
plurality of conductive elements, the members of the first
plurality extend linearly, spaced apart from one another, across
the grid generally in a first direction and a second plurality of
conductive elements, the members of the second plurality extend
linearly, spaced apart from one another across the grid generally
in a second direction.
3. A structure as in claim 1 where the grid wirelessly couples
electrical energy to the unit.
4. A structure as in claim 3 where the unit, responsive to received
wireless electrical energy from the grid, induces the electrical
signal therein.
5. A structure as in claim 4 where the grid couples the induced
electrical signal to control circuits which produce a
multidimensional position indicating visual display indicative of
the location of the unit relative to the grid.
6. A structure as in claim 5 which includes a source of varying
electrical signals coupled to the grid.
7. A structure as in claim 2 where the members of the first
plurality are substantially perpendicular to the members of the
second plurality.
8. A structure as in claim 2 which includes a signal sensor coupled
to at least one member of one plurality.
9. A structure as in claim 2 which includes first circuitry coupled
to the members of the first plurality, the first circuitry senses
electrical signals induced in respective members of the first
plurality.
10. A structure as in claim 9 which includes second circuitry
coupled to the members of the second plurality, the second
plurality senses electrical signals induced in respective members
of the second plurality.
11. A structure as in claim 10 which includes location
determination circuitry, responsive to outputs from the first and
second circuitry, the determination circuitry establishes a
location, relative to the grid, of the at least one identification
unit.
12. A structure as in claim 11 which includes a display unit,
coupled to the determination circuitry for presenting a
multi-dimensional image indicative of the location of the at least
one identification unit relative to grid.
13. A structure as in claim 2 which includes a source of current
coupled to at least some members of the pluralities, the at least
one unit wirelessly receiving electrical energy therefrom.
14. A structure as in claim 13 where currents flow in opposite
directions, relative to one another, in adjacent members of a
respective plurality.
15. A structure as in claim 2 which includes a source of
alternating current coupled to at least some members of the
pluralities, the at least one unit wirelessly receiving electrical
energy therefrom.
16. A structure as in claim 15 where currents flow in opposite
directions, relative to one another, in adjacent members of a
respective plurality.
17. A structure as in claim 1 where the identification unit
includes a wireless energy acquiring element; and a transmitter of
an identifier.
18. A structure as in claim 17 which includes a plurality of
identification units, each of the units transmits a different
identifier.
19. A structure as in claim 15 where the current has a first
frequency and the unit includes an oscillator coupled to orthogonal
transmitting antennas, the unit transmits an electrical signal at a
different frequency.
20. A real-time tracking system comprising: at least one elongated
conductive member; a source of varying electrical signals coupled
to the member; and a first location indicating unit having at least
one antenna, the unit is movable relative to the member and
responds to wireless electrical energy from the varying electrical
signals coupled to the member, the unit carries an attachment
element.
21. A system as in claim 20 which includes a visual output device
coupled to the member, the device displays an indicator when the
unit is proximate to the member.
22. A system as in claim 20 where the unit includes a transmitter,
activated by received wireless energy, when activated, the
transmitter emits a location indicating wireless signal.
23. A system as in claim 22 where the conductive member responds to
the location indicating wireless signal and can couple a
representation of that signal to an output device.
24. A system as in claim 23 where the output device comprises a
multidimensional visual output device.
25. A system as in claim 23 which includes a second elongated
conductive member, the conductive members are substantially
perpendicular to one another.
26. A system as in claim 25 where the second conductive member
responds to the location indicating wireless signal and can couple
a representation of that signal to the output device.
27. A system as in claim 26 where the output device comprises a
multidimensional visual output device.
28. A system as in claim 27 which includes first and second
pluralities of conductive members, the first conductive member
being a member of the first plurality and the second conductive
member being a member of the second plurality.
29. A system as in claim 28 where the members of the first and
second pluralities respond to the location indicating wireless
signal and couple representations of that signal to the output
device.
30. A system as in claim 29 which includes circuitry, responsive to
the representations, to couple a sequence of signals to the output
device which presents a multidimensional visual representation of
movement of the unit relative to the first and second
pluralities.
31. A system as in claim 30 where the output device presents the
representation of movement of the unit in real-time.
32. A system as in claim 30 which includes a second location
indicating unit having at least one antenna, the second unit is
substantially identical to the first unit with the transmitter of
each unit emitting an electrically distinguishable location
indicating wireless signal.
33. A system as in claim 32 where the circuitry, responsive to
representations of received wireless signals, presents a
multidimensional visual representation of movement of the units
relative to the first and second pluralities of conductors.
34. A system as in claim 33 where the circuitry presents color
coded multidimensional representations of movement of the units on
the output device.
35. A system as in claim 33 where the circuitry presents color
coded multidimensional representations of movement and orientation
of the units, relative to the pluralities of conductive members, on
the output device.
36. A system as in claim 28 where the first and second pluralities
are carried by one of a floor or a floor mat.
37. A system as in claim 28 where the unit includes a plurality of
transmitting coils.
38. A system as in claim 37 where the transmitting coils are
orthogonally oriented relative to one another.
39. A system as in claim 38 where at least one of the coils is
responsive to wireless electrical energy from the varying
electrical signals.
40. A system as in claim 39 where the varying electrical signals
comprise alternating electrical signals.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application is a Continuation of and claims the benefit
of the filing date of U.S. patent application Ser. No. 11/460,301
filed Jul. 27, 2006 and entitled "System and Method of
Simulation".
FIELD
[0002] The invention pertains to methods and systems for training
individuals in responding to various types of high stress or
emergency situations. More particularly, the invention pertains to
combat simulators, fire fighting simulators, or policing
simulators, all of which can unfold in an urban setting.
BACKGROUND
[0003] A need exists for simple systems for locating multiple
participants in simulated urban combat. One technique for doing
this is by using a floor that can read out the location of multiple
participants' boots as they move around across the floor. None of
the known systems are fully satisfactory for meeting the urban
combat training requirements.
[0004] One known solution uses pressure sensors embedded in the
floor to sense where the feet are positioned. This approach cannot
distinguish between individual participants. Other solutions do not
use an instrumented floor and depend on IR beams, magnetic
transmitters and sensors, acoustics, and inertial sensors. They all
have shortcomings because of cost, complexity, interference due to
the all-metal enclosure where the training will take place, or
other problems.
[0005] There is thus a continuing need for cost effective simple
and reliable systems and methods for tracking individuals in a
region who are participating in high stress or emergency situation
simulations. Preferably information could be provided in real-time
as to the location(s) of the respective individual(s). It would
also be preferable if such systems could be implemented relatively
inexpensively and readily installable in simulation locations.
BRIEF DESCRIPTION OF THE DRAWINGS
[0006] FIG. 1 is a top plan view of a training facility
instrumented in accordance with the present invention;
[0007] FIG. 2 is a block diagram of a boot mountable transmitting
unit in accordance with the present invention.
DETAILED DESCRIPTION
[0008] While embodiments of this invention can take many different
forms, specific embodiments thereof are shown in the drawings and
will be described herein in detail with the understanding that the
present disclosure is to be considered as an exemplification of the
principles of the invention, as well as the best mode of practicing
same, and is not intended to limit the invention to the specific
embodiment illustrated.
[0009] In one embodiment of the present invention, a floor is
covered by a mat or carpet containing a rectangular grid of
embedded wires, perhaps spaced about six inches apart. The
participants carry pulsed or continuous-wave wireless transmitters
affixed to their boots such that when a transmitter is close to one
or more of the wires, currents are induced in the wires. By
determining which wires are receiving the induced signals the
location(s) of the transmitting boot(s) can be determined.
Different participants have different-frequency transmitters so
that each participant can be individually tracked.
[0010] The embedded wires can also carry an AC current so that the
transmitters can be inductively powered from the grid thereby
energizing the transmitters. As a result, the transmitters can be
passive in that they do not require batteries. Transmitters emit
RF, electromagnetic, waves.
[0011] At the edges of the embedded grid the wires can be coupled
to processing circuitry and/or fed to a central location where
signals are extracted and the power input for inductive powering of
the transmitters is applied. The powering currents have a frequency
separated from the signal frequencies so that the signal
frequencies can be extracted with a minimum of interference from
the powering currents. The powering currents flow in opposite
directions in adjacent wires, thus creating an array of magnetic
loops which have their axes oriented vertically.
[0012] A transmitter module in accordance with the invention
incorporates a coil with a vertical axis for coupling to the
powering currents in the floor grid. The power generated is stored
in a capacitor which acts as a battery to store the energy for use
by the transmitter. The transmitter has an oscillator connected to
a trio of orthogonal transmitting antennas, or, coils for maximum
coupling to the embedded wires independent of the orientation of
the boot, for example, if the participant is prone. The module is
attached to the side of the boot by releasable tapes or other
inexpensive easy to use structures. Each participant's
transmitter(s), possibly one on each foot, operates at a different
frequency so that they, and each of their feet, can be uniquely
identified.
[0013] Embodiments of the invention are simple, low cost, and
unambiguously track each participant's boot location(s) in
real-time. Such embodiments can be installed very quickly and
require no lengthy calibration of the location-determining
equipment, as some of the known systems do.
[0014] FIG. 1 is a top plan view of a simulation and training
region R wherein a system 10 in accordance with the invention has
been installed. The system 10 incorporates a planar,
two-dimensional mat 12. The mat 12 can be woven or molded all
without limitation. The type of material used in the mat 12 is not
a limitation of the invention.
[0015] In accordance with the invention, mats such as the mat 12,
discussed in more detail subsequently, would be positioned in the
regions in which the training and/or simulation activities are to
be conducted. For example, if the facility is a multi-floor
building mats such as the mat 12 can be installed on each of the
floors as well as on the stairs. The mats function to provide
position specifying and participant specifying signals to an
associated control/display system 16. The system 10 can incorporate
one or more programmable processors, such as the processors 16a,
one or more graphical display devices 16b and control software 16c
which can be executed by the one or more processors 16a.
[0016] To provide the above-noted signals to the control 16, mat 12
preferably incorporates first and second pluralities 20, 22 of
embedded wires which are insulated from one another. As illustrated
in FIG. 1, the members of the plurality 20, 22 are oriented at
right angles to one another forming an X,Y type grid. Preferably
the members of each plurality will be positioned relatively close
to each other, on the order of for example of 6 inches apart.
[0017] Ends such as ends 20-1, 20-2 and 22-1, 22-2 extend from the
mat 12 and are interconnected and coupled to respective circuits
30-1, 30-2 and 32-1, 32-2. Circuitry 30-1, -2, 32-1, -2 can include
multiplexer, de-multiplexer circuitry of types that would be known
to those of skill in the art to enable the control system 16 to
communicate with and receive communications from each of the
members of the pluralities 20, 22 in the mat 12.
[0018] In accordance with the above, AC-type power signals of a
predetermined frequency can be coupled to the members of the
plurality 20, for example, members 20-3, 20-4. Preferably, these
currents Ic1 and Ic3 will flow in opposite directions to one
another, in adjacent wires, and as a result, create an array of
magnetic loops which have their axes oriented vertically.
[0019] The electromagnetic fields established by the varying
currents such as Ic1, Ic3 in the members of the plurality 20 as
well as Ic2 and Ic4 in the members of the plurality 22 function as
wireless sources of electrical energy which can be used to power
transmitters such as T1, T2 which can be worn (for example on the
boots B1, B2) of an individual I participating in the training or
simulation in the region R. The transmitters T1, T2 inductively
acquire electrical energy from the grid in the mat 12.
[0020] Each of the transmitter units T1, T2, emits identification
signals at a substantially different frequency than the frequency
of the energy supplying currents Ic1, Ic3, Ic2 and Ic4 as described
above. Since each of the transmitters T1, T2 emits a different
identifying wireless signal, which can be coupled to adjacent
members of the plurality 20, 22 such as 20-3, 22-3 (adjacent to
transmitter T1) and 20-4, 22-4 (adjacent to transmitter T2),
location information, based on the intersection of 20-3 and 22-3,
for boots B1, B2 is available in real-time.
[0021] Signals emitted by the transmitters T1, T2, inductively
coupled to the members of the pluralities 20, 22 can be sensed at
control system 16 via circuitry 30-1, -2, 32-1, -2. The location of
the transmitters T1, T2 on the mat 12 can then be presented on the
display 16b under the control of the software 16c. This provides a
real-time display of the location of the boots B1, B2 of the
individual I who is participating in the simulation.
[0022] As the individual I moves across the mat 12 in a direction D
the presentation thereof on the display 16b also moves in
real-time. The locations of multiple individuals in the region R
can thus be displayed and tracked simultaneously.
[0023] FIG. 2 is a block diagram of a representative member of the
plurality of transmitters Ti. The unit Ti incorporates receiver
circuitry, for example, interface circuitry 40 which is in turn
coupled to storage capacitor 42. The interface circuitry 40 is also
coupled to a coil, such as coil C1, having a vertical axis when the
transmitters, such as Ti, are coupled to the respective boots of
the participant in the simulation. This coil, for example, coil C1
inductively receives electrical energy from the various AC-type
currents in the members of the plurality 20, 22. The associated
electrical energy is coupled via interface circuits 40 and stored
on capacitor 42.
[0024] The transmitter unit Ti also incorporates a transmitter 44
of uniquely identifying RF signals which can be emitted wirelessly
via a trio of orthogonal transmitting coils such as C1, C2, C3. It
will also be understood that the coil C1 which couples energy to
the interface circuitry 40 as well as emitting a position
indicating a wireless signal could be implemented with two separate
coils without departing from the spirit and scope of the
invention.
[0025] Preferably the trio of orthogonal coils C1, 2 and 3 will be
used to provide maximum coupling to the embedded wires, the members
of the plurality 20, 22 independent of the orientation of the
respective boot Bi. This provides continual coupling of position
identifying signals irrespective of whether the individual I is
standing, kneeling or lying on the mat 12. Each of the transmitting
units Ti incorporates a housing 46a and attachment straps of 46b, c
to attach the unit Ti to the individual's respective boot.
[0026] Those of skill will understand that the transmitting units
Ti can be implemented with a variety of different circuitry and
antenna all without departing from the spirit and scope of the
present invention. When both boots are identified the orientation
of the individual I is also identified. If it is unnecessary to
identify the location of both of the boots B1, B2 of the individual
I during a given exercise, only a single transmitter unit Ti will
be needed to supply the location of the respective participant. The
participant identifying images presented on the display 16b can be
in color and individual participants can be identified using color
as well as alpha numeric indicators.
[0027] From the foregoing, it will be observed that numerous
variations and modifications may be effected without departing from
the spirit and scope of the invention. It is to be understood that
no limitation with respect to the specific apparatus illustrated
herein is intended or should be inferred. It is, of course,
intended to cover by the appended claims all such modifications as
fall within the scope of the claims.
* * * * *