U.S. patent application number 11/807062 was filed with the patent office on 2007-11-29 for gait training system using motion analysis.
Invention is credited to Soon-Ki Jung, Yang-Soo Lee.
Application Number | 20070275830 11/807062 |
Document ID | / |
Family ID | 37627317 |
Filed Date | 2007-11-29 |
United States Patent
Application |
20070275830 |
Kind Code |
A1 |
Lee; Yang-Soo ; et
al. |
November 29, 2007 |
Gait training system using motion analysis
Abstract
A gait training system using motion analysis is provided to
perform consecutive motion analysis while a person to be measured
is walking on a treadmill. The gait training system includes a
treadmill including a belt rotatable by a roller of which a
rotating rate is adjustable in response to a walking speed of a
walker; and measuring means for transferring signals associated
with a movement of a body of the walker. The measuring means are
attached to the body. A control unit analyzes a walking movement
based on a data from the measuring means, and a display unit
displays the data to the walker.
Inventors: |
Lee; Yang-Soo; (Daegu,
KR) ; Jung; Soon-Ki; (Daegu, KR) |
Correspondence
Address: |
PATENTS+TMS, P.C.
2849 W. ARMITAGE AVE.
CHICAGO
IL
60647
US
|
Family ID: |
37627317 |
Appl. No.: |
11/807062 |
Filed: |
May 25, 2007 |
Current U.S.
Class: |
482/54 |
Current CPC
Class: |
A63B 2024/0093 20130101;
A63B 2220/13 20130101; A63B 2220/806 20130101; A61B 5/112 20130101;
A63B 24/0006 20130101; A63B 22/0242 20130101; A63B 2220/16
20130101; A61B 5/1038 20130101; A61B 5/1127 20130101; A63B 24/0003
20130101; A61B 5/4528 20130101; A63B 22/0235 20130101; A63B
2024/0009 20130101 |
Class at
Publication: |
482/54 |
International
Class: |
A63B 22/02 20060101
A63B022/02 |
Foreign Application Data
Date |
Code |
Application Number |
May 29, 2006 |
KR |
10-2006-0047992 |
Claims
1. A gait training system, the system comprising: a treadmill
having a belt rotatable by a roller wherein a rotating rate of the
roller is adjustable in response to a walking speed of a walker;
measuring means for transferring signals associated with a movement
of a body of the walker wherein the measuring means is attached to
the body; a control unit for analyzing a walking movement of the
walker based on a data from the measuring means; and a display unit
for displaying the data to the walker.
2. The gait training system of claim 1 further comprising: a marker
attached to a lower limb of the walker wherein the marker captures
a motion and further wherein the measuring means has a camera
arranged adjacent to the treadmill wherein the camera locates the
marker wherein the camera detects a walking movement of the walker
on the treadmill.
3. The gait training system of claim 1 further comprising: an
electric goniometer: wherein the electric goniometer has a flexible
bar for bending in response to a bending of a lower limb joint of
the walker and further wherein the electric goniometer has an
attachment support for securing the flexible bar to a lower limb of
the walker.
4. The gait training system of claim 1 further comprising: a
goniometer: wherein the goniometer has a variable resistor with a
resistance value that varies according to an angle of a joint and
further wherein the goniometer has an attachment support for
securing the variable resistor to a lower limb of the walker.
5. The gait training system of claim 1 further comprising: a sensor
arranged in a position lateral to the belt wherein the sensor has
piezoelectric devices arranged with a gap on an upper surface of
the sensor.
6. The gait training system of claim 5 wherein the sensor: has a
first sensor arranged in a front portion of the treadmill wherein
the first sensor detects an accelerated movement and a relocation
of the walker and further wherein the sensor has a second sensor
arranged in a rear portion of the treadmill wherein the second
sensor detects a decelerated movement and the relocation of the
walker.
7. The gait training system of claim 1 further comprising: a pair
of piezoelectric plates arranged in a bottom surface of the
treadmill wherein the piezoelectric plates measure a time that a
lower limb of the walker touches the bottom surface of the
treadmill.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a gait training system
using motion analysis, designed to perform consecutive motion
analysis while a person to be measured is walking on a
treadmill.
[0003] 2. Description of the Related Art
[0004] Walking is a most efficient way to move that humans most
frequently use. To treat those having difficulty in walking, motion
analysis is an essential prerequisite.
[0005] The motion analysis is carried out for the study of the
movements of several body portions by using kinematic data, kinetic
data and dynamic electromyography (EMG) data. To date, it has been
a substantially unique motion analysis method that a doctor
repeatedly examines with bare eyes walking behaviors of a
musculo-skeletal patient. However, this method is impossible to
objectively clarify various factors that might cause abnormal gait
and changes in the abnormal gait. Accordingly, a motion analysis
system with most advanced electronic and computer technologies
integrated thereto has been demanded in order to acquire objective
information associated with abnormal gait and thus enable correct
treatment. Up to present, many hospitals and laboratories worldwide
related with rehabilitation medicine, orthopedic medicine, sports
medicine, industrial medicine and the like have been introducing
and actively utilizing such systems. In addition, such systems are
likely to spread more.
[0006] FIG. 7 is a perspective view illustrating a conventional
motion analysis system.
[0007] The conventional motion analysis system includes an infrared
strobe, video cameras 101 to 103, a pressure sensing plate 111,
other sensors attached to joints of a patient by which the
movements of the joints can be detected, data analysis software and
so on.
[0008] The motion analysis system can analyze the gait of the
patient in a photographing area of the cameras, in particular, at
one point. However, as a basic problem, this system cannot be
applied to a gait training process which needs to analyze and feed
back walking behaviors of a user in real-time to correct the gait.
In addition, a large amount of data is required to analyze gait
information since gait is not performed at specific locations. A
large amount of time is also necessary to process such data.
[0009] Furthermore, since a motion analysis performed at one point
does not ensure data reliability, a patient is required to walk
repeatedly. This, however, results in problems such as a prolonged
time period for the motion analysis, accumulated fatigue of the
patient and a large measuring space.
SUMMARY OF THE INVENTION
[0010] The present invention has been made to solve the foregoing
problems of the prior art and therefore an object of certain
embodiments of the present invention is to provide a gait training
system capable of measuring joint angle data of a patient in
real-time and feeding the data back to the patient while the
patient is walking, thereby enabling a gait training.
[0011] Another object of the invention is to provide a gait
training system capable of using a treadmill with a rotating rate
adjustable in response to a walking rate so that a patient can
repeatedly walk at the same location in order to repeatedly analyze
walking behaviors. This system can also feed gait data back in
real-time to the patient so that the patient can perform training
according to the motion analysis.
[0012] Further another object of the invention is to provide a gait
training system of a relatively simple design, which can be
installed in a relatively limited room, shorten a walking time of a
patient, and afford real-time input data of motion analysis to the
patient to perform gait training.
[0013] According to an aspect of the invention for realizing the
object, the invention provides a gait training system. The gait
training system includes a treadmill including a belt rotatable by
a roller of which a rotating rate is adjustable in response to a
walking speed of a walker; measuring means for transferring signals
associated with a movement of a body of the walker, the measuring
means attached to the body; a control unit for analyzing a walking
movement based on a data from the measuring means; and a display
unit for displaying the data to the walker.
[0014] Preferably, the measuring means may include at least one
marker attached to a lower limb of the walker, the marker capable
of capturing a motion; and a camera arranged adjacent to the
treadmill to locate the marker in order to detect a walking
movement of the walker on the treadmill. Alternatively, the
measuring means may comprise an electric goniometer including a
flexible bar capable of bending in response to a bending of a lower
limb joint of the walker; and an attachment support for securing
the flexible bar to a lower limb of the walker. As a further
alternative, the measuring means may comprise a goniometer
including a variable resistor with a resistance value varying
according to an angle of a joint; and an attachment support for
securing the variable resistor to a lower limb of the walker.
[0015] Preferably, the treadmill may include at least one sensor
arranged laterally of the belt, the sensor having piezoelectric
devices arranged with a gap on an upper surface thereof. Here, the
sensor may include a first sensor arranged in a front portion of
the treadmill to detect an accelerated movement and a relocation of
the walker; and a second sensor arranged in a rear portion of the
treadmill to detect a decelerated movement and a relocation of the
walker. Preferably, the treadmill may include a pair of
piezoelectric plates arranged in a bottom surface thereof, which
lower limbs of the walker touch, to measure a time that one of the
lower limbs of the walker touches the bottom surface of the
treadmill.
BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The above and other objects, features and other advantages
of the present invention will be more clearly understood from the
following detailed description taken in conjunction with the
accompanying drawings, in which:
[0017] FIG. 1 is a perspective view illustrating a gait training
system using motion analysis according to the invention;
[0018] FIG. 2 is a perspective view illustrating another embodiment
of the treadmill shown in FIG. 1;
[0019] FIG. 3 is a perspective view illustrating further another
embodiment of the treadmill shown in FIG. 1;
[0020] FIG. 4 is a perspective view illustrating another embodiment
of the measuring means shown in FIG. 1;
[0021] FIG. 5 is a perspective view illustrating further another
embodiment of the measuring means shown in FIG. 1;
[0022] FIG. 6 is a graph illustrating an example of movement
analysis according to the invention; and
[0023] FIG. 7 is a perspective view illustrating a conventional
motion analysis system.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0024] The present invention will now be described more fully
hereinafter with reference to the accompanying drawings, in which
preferred embodiments of the invention are shown.
[0025] FIG. 1 is a perspective view illustrating a gait training
system using motion analysis according to the invention.
[0026] The gait training system of the invention includes a
treadmill 10. The treadmill 10 includes a belt 11 being rotated by
rollers (not shown). The treadmill 10 rotates the rollers (or one
of the rollers) to move the belt, on which a user can walk as if on
the ground. As one technical feature of the invention, the gait
training system of the invention is constructed so that a user can
consecutively walk at one point on the treadmill 10.
[0027] FIG. 2 illustrates sensor units installed in the treadmill
of the invention. As the walker accelerates walking, he/she moves
forward on the treadmill. Then, at least one of piezoelectric
devices installed under the belt detects the acceleration and sends
a detection signal to the drive motor. In response to the detection
signal, the motor accelerates its rotating rate to drive the belt
faster. For this function, the piezoelectric devices are arranged
with a gap, constructing a first sensor unit 41. In this fashion,
the first sensor unit 41 is installed in a front portion of the
treadmill to detect any acceleration of the walker.
[0028] On the contrary, a plurality of piezoelectric devices are
arranged in a rear portion of the treadmill, constructing a second
sensor unit 42. The second or rear sensor unit 42 detects a foot of
the walker treading on any of the piezoelectric devices and sends a
detection signal so that the drive motor can decelerate rotation.
Thus, the second sensor unit 42 is configured to detect the
deceleration of the walker. In addition to detection on the
acceleration or the deceleration of the walker, the first and
second sensor units 41 and 42 can detect a relocation of the
walker.
[0029] Referring to FIG. 3, relatively large piezoelectric plates
61 are installed in right and left parts of the treadmill, on which
the walker or patient treads, in order to detect a time that the
lower limbs of the patient touch the treadmill. In this case, the
piezoelectric plates 61 are arranged between the acceleration
sensor unit (i.e., the first sensor unit 41) and the deceleration
sensor unit (e.g., the second sensor unit 42) under the belt, in
areas on which the right and left lower limbs of the patient tread,
respectively. The piezoelectric devices may detect the level of a
treading pressure by the patient to measure the weight loaded on
the lower limb. Furthermore, by measuring the time that the lower
limbs touch the treadmill, it is possible to examine the patient
hobbling with the weight biased to one limb.
[0030] As an alternative, markers may be attached to one leg and
edges 31 of supports of the treadmill and then the locations of the
markers can be compared. FIG. 2 shows the treadmill with the
markers attached thereto. When the markers 50 attached to the
patient's leg move forward of the markers 51 attached to the
support edges 31 of the treadmill, a control is made to accelerate
the treadmill. In a reverse case, a control will be made to
decelerate the treadmill. The markers 51 may be attached to the
treadmill by plural numbers, and one of the markers 51 most
adjacent to an initial location of the markers 50 attached to the
patient's leg may act as a location reference for the detection of
acceleration and deceleration.
[0031] The invention provides such a treadmill with the rotating
rate adjusted in response to the walking rate. However, such a
method of adjusting the rotating rate of the treadmill as described
above is merely an example but not intended to limit the
invention.
[0032] The gait training system of the invention also includes
measuring means attached to the body of the patient walking on the
treadmill, by which signals associated with movements of the body
can be sent to a controller. As in FIGS. 1 to 3, the invention
adopts the markers 50 as the signing means to capture a motion or
movement by using external cameras.
[0033] The markers 50 can be attached to a joint and surrounding
portions above and below the joint. With the markers 50, it is
possible to determine the angle and the location of the joint which
vary in accordance with the movement of the lower limb. That is, by
locating the markers 50 attached to the lower limb with the
cameras, it is possible to measure the angle and the position of
the joint varying according to the movement of the lower limb in
walking. The positions of the markers may be varied according to
regions to be measured such as knee, ankle and hip joints. For
example, the markers are attached to the knee joint and thigh and
calf portions above and below the knee joint when the knee joint is
to be measured, and to the ankle joint and foot and calf potions
above and below the ankle joint when the ankle joint is to be
measured. In case of hip joint measurement, the markers are
attached to the hip joint and shoulders and thigh portions above
and below the hip joint. The markers 50 are preferably attached in
positions opposing the camera 20 so that the camera 20 can detect
the markers 50.
[0034] In this disclosure, the cameras 20 and 21 are used as the
photographing means. Each of the cameras 20 and 21 includes a
sensor such as an infrared ray sensor, and is installed adjacent to
the treadmill 10 to detect the movement of the walker walking on
the treadmill. The cameras 20 and 21 may be provided by one or
more, and the position and number of the cameras may be varied
according to environments and conditions of a patient.
[0035] In the invention, electric goniometers 71 may be used as the
measuring means for transferring signals associated with body
movements of the walker on the treadmill. As shown in FIG. 4, each
of the electric goniometers 72 includes a flexible bar 72 and
attachment supports 73. The flexible bar 72 is made of a flexible
material to bend along with a joint, and the attachment supports 73
are connected to a portion of a lower limb and the flexible bar 72
so that the flexible bar 72 can bend along with the joint. The
attachment supports 73 of the electric goniometer 71 are attached
to upper and lower portions of a joint to be measured, and
connected to the flexible bar 72 positioned in the side of the
joint to be measured.
[0036] FIG. 5 illustrates goniometers 81 each having a variable
resistor, which can be adopted as the measuring means. Referring to
FIG. 5, each of the goniometers 81 includes a variable resistor 82
with its resistance varying according to the angle of a joint and
attachment supports 83 for attaching the variable resistor to a
lower limb. Likewise the attachment supports 73 of the electric
goniometer 71, the attachment supports 83 are placed in portions
above and below the joint. The variable resistor 82 of the
goniometer 81 has a resistance-adjusting portion configured to move
along with the joint so that the resistance of the variable
resistor 82 is varied with the angle of the joint changing. Thus,
the angle of the joint can be measured based on the resistance
value varying according to the angle of the joint.
[0037] Outside cameras may be excluded in a case where the electric
goniometer or the goniometer having a variable resistor is used as
in FIG. 4 or 5. In case of receiving gait data from the
photographing means or from the electric goniometer or the
goniometer having a variable resistor, the control unit can compare
the data with data of normal gait to determine gait abnormality.
The control unit can also display the gait data to a walker to
appreciate his/her gait abnormality, and thereby the walker can
have a train to correct the abnormal gait by him/herself. For this
purpose, the control unit may also include a display unit 70
installed in front of the walker to display the gait data in
diagrams or graphs to the walker.
[0038] FIG. 6 is a graph illustrating an example of movement
analysis according to the invention. Referring to FIG. 6, locations
of an abnormal knee joint measured from markers attached thereto
are displayed on a screen to be compared with locations of a normal
knee joint. In this fashion, abnormal values can be displayed in
real-time together with normal values so that a walker can take a
gait training on a treadmill attempting to conform his/her gait to
the normal gait.
[0039] The gait training system of the invention provides a
treadmill on which a user can walk, and while the user is walking
on the treadmill, consecutively performs motion analysis on the
user and then provides the motion analysis result to the user in
real-time in order to induce the user toward a normal gait.
[0040] Furthermore, it is possible to provide a system having
motion analysis and training functions. This system can perform
motion analysis in a shorter time, even in a relatively limited
room, and afford gait training to a user.
[0041] While the present invention has been described with
reference to the particular illustrative embodiments and the
accompanying drawings, it is not to be limited thereto but will be
defined by the appended claims. It is to be appreciated that those
skilled in the art can substitute, change or modify the embodiments
into various forms without departing from the scope and spirit of
the present invention.
* * * * *