JP2760473B2 - Body sway meter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for recovery training of a balance function of a subject whose balance function has been reduced due to some kind of obstacle, and for measuring the center of gravity of the subject in the fields of exercise engineering, ergonomics, and the like. Related to a center of gravity sway meter.

[0002]

2. Description of the Related Art In rehabilitation such as after surgery for fracture or amputation of a lower limb, after surgery on a joint, or after a stroke of paralysis, for example, the body of a patient who is initially in a standing position Training is performed to reduce fluctuations in the position of the center of gravity, and after this training, training is performed to stand up from a chair or floor in a well-balanced manner. In performing such training, in particular, when performing training to reduce fluctuations in the position of the center of gravity when the user takes a standing posture, a body sway meter 1 as shown in FIG. 5 is conventionally used.

The center of gravity sway meter 1 has a rectangular detection plate 2 on which a patient places both feet, and load detection sensors 3 ‥ provided at the front, left rear, and right rear of the detection plate 2.
And a calculation unit 4 that determines the center of load from the loads detected by the load detection sensors 3 # and uses this as the center of the center of gravity of the patient, and a display device that continuously displays the center of gravity determined by the calculation unit 4. 5 is provided. And with such a configuration, the body sway meter 1
When the patient takes a standing posture with both feet on the detection plate 2, each load detection sensor 3 各 detects the load applied to each position, and the calculation unit 4 calculates the load center of the patient from the detected values. The center of gravity is obtained, and the obtained center of gravity can be displayed on the display device 5 as a trajectory K indicating the movement of the center of gravity as shown in FIG. 6, for example.

[0004] According to such training, the state of fluctuation of the center of gravity of the patient can be understood by looking at the trajectory K displayed on the display device 5. By comparing the intention to eliminate the fluctuation with the actual change in the center of gravity, the doctor and the patient themselves can grasp the state of recovery by training. That is, the trajectory K shown in FIG.
From the figure formed by the outline L1, the center point is estimated and identified as the apparent center-of-gravity center position G1 of the patient. By looking at the transition, you can see how much the patient's recovery is progressing.

[0005]

However, the training using the sway meter 1 has the following inconveniences.
It is generally considered that the true position of the center of gravity between both feet when a healthy human is in a standing position with both feet aligned is generally at the center point between both feet. However, the center-of-gravity fluctuation meter 1 does not know the position of the specified apparent center of gravity G1 with respect to the true center of gravity.
For example, even if one of the legs or the brain has an obstacle, the center of gravity is constantly deviated right and left or back and forth, and even if the center of gravity fluctuates around this deviated position, the center of gravity oscillometer 1 detects this. You can't figure out.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a center of gravity sway meter capable of examining the positional relationship between the true center of gravity and the measured center of gravity. It is in.

[0007] In the center of gravity sway meter according to the first aspect of the present invention, a detection plate on which both feet of the subject are placed, and a center of the total load applied to both feet of the subject continuously provided on the detection board. A plurality of load detecting means for detecting the position of the subject, intermittently or intermittently; a calculating means for calculating the position of the center of gravity of the subject based on the detection signals from the load detecting means; and a position of the center of gravity calculated by the calculating means is preset. X, which is converted into a position on the XY coordinate and stored as an XY coordinate
Y-coordinate position storage means ,
The center point between both feet on this is on the XY coordinates
There is a center point detection means to detect which is
The center point detecting means is disposed vertically and horizontally orthogonally.
Vertical and horizontal fixed rulers and approximately perpendicular to the vertical fixed ruler
Along the longitudinal direction of the vertical fixed ruler.
A pair of horizontally movable rulers and a fixed horizontal ruler
And the length of the horizontal fixed ruler
A pair of vertically movable rulers provided movably along the direction
The vertical fixed ruler and the horizontal fixed ruler, the X-
A scale corresponding to the Y coordinate must be provided.
The door was solutions of the problems.

[0008] According to the sway meter according to the second aspect , the subject's
A detection plate on which both feet can be put together, and the detection plate
The center of the total load applied to both feet of the subject is continuously or
Means a plurality of load detecting means for intermittently detecting
Based on the detection signal from the detection means, the center of gravity of the subject
Calculating means for calculating the position, and
To the position on the XY coordinate set in advance.
XY coordinate position storage for storing this as XY coordinates
Means, and mounted on the detection plate.
Where the center point between the two feet is on the XY coordinates
And a center point detecting means for detecting
Point detecting means is provided on the detection plate corresponding to the XY coordinates.
Consists of a large number of sensors arranged in a matrix, and
Whether the sensor is positioned on the surface of the subject
Before that it consists of a sensor that detects whether or not
This is a means of solving the problem.

[0009]

According to the center-of-gravity sway meter of the first aspect, the center point detection for detecting the center point between the two feet placed on the detection plate on the XY coordinate set in advance. since means are provided in advance by detecting the center point between both feet in advance by the center point detecting unit, among the obtained feet of
By comparing the center point with the center of gravity calculated from the center of gravity calculated from the center of gravity calculated by the calculation means and further stored as XY coordinates by the XY coordinate position storage means, the center point between both feet considered to be the true center of gravity is obtained. And the positional relationship with the calculated center of gravity center position can be checked.

In addition, the center point detecting means is provided in a vertical fixed ruler and a horizontal fixed ruler arranged orthogonally in the vertical and horizontal directions, and substantially perpendicularly to the vertical fixed ruler, and the vertical fixed ruler is provided in the longitudinal direction thereof. A pair of horizontally movable rulers provided movably along
A pair of vertically movable rulers are provided substantially perpendicular to the horizontal fixed ruler, and the pair of vertically movable rulers are provided movably along the length direction of the horizontal fixed ruler.
Since the scale corresponding to the X-Y coordinates set in advance is provided and configured, the examinee puts both feet on the detection plate, and then sandwiches both sides of both feet with a pair of vertically movable rulers, and The front and rear sides of both feet are sandwiched by the horizontal movable ruler, and in that state, the position of the edge of each movable ruler on the subject side is read or detected from the scales provided on the vertical and horizontal fixed rulers, and furthermore, both feet are obtained from the obtained results. By calculating the center point between the two legs, it is possible to know where the center point between both feet is located on the XY coordinates.

According to sway meter according to claim 2, the center point detecting unit, consists of a number of sensors provided in a matrix on the detection board in response to a preset X-Y coordinates, and Since the sensor is configured by a sensor that detects whether or not the foot of the subject is positioned on the surface, the largest X coordinate and Y coordinate among the sensors that detect the foot, and By detecting sensors corresponding to the small X coordinate and the Y coordinate, respectively, and calculating the center point between both feet from these coordinates, the center point between both feet becomes X-
The position on the Y coordinate can be known.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a view showing an embodiment of a center of gravity sway meter according to the present invention. In this figure, reference numeral 10 denotes a center of gravity sway meter. The body sway meter 10 includes a substantially square detection plate 11 on which both feet of a subject (patient) are placed, and four detection boards 11 provided on the detection board 11 for detecting the center of the total load applied to both feet of the patient. , A calculating means 13 for calculating the position of the center of gravity of the patient based on the detection signals from the load cells 12, and a position of the center of gravity calculated by the calculating means 13 in X XY coordinate position storage means 14 for converting the position into a position on the Y coordinate and storing this as XY coordinates, and a display device 15 for displaying the position of the center of gravity calculated by the calculating means 13. is there.

The arithmetic means 13 includes a central processing unit (CPU), a RAM serving as an internal storage device,
The XY coordinate position storage means 14 is stored in an arithmetic processing device (computer) having a memory such as a ROM, and is stored in an auxiliary storage device such as a magneto-optical disk. is there.

The load cells 12 are arranged at the respective corners of the substantially square detection plate 11 so as to form the respective vertices of the square, and are embedded in the surface layer of the detection plate 11. An amplifier 16 for amplifying the output of each of the load cells 12 is connected to the load cells 12. Further, an arithmetic processing device serving as arithmetic means 13 is connected to the amplifiers 16 via a filter 17 and an AD converter 18. .

As shown in FIG. 2, the detection plate 11 is provided with a center point detection ruler (center point detection means) 19 for detecting a center point between both feet of the patient. The center point detection ruler (hereinafter simply referred to as a detection ruler) 19 includes a pair of vertical fixed rulers 20a, 20a and a pair of horizontal fixed rulers 20b,
20b and a fixed ruler 20 formed by being assembled vertically and horizontally in a square frame shape, and a pair of fixed rulers 20 provided substantially orthogonal to the vertical fixed ruler 20a and movably provided on the vertical fixed ruler 20a. Horizontal movable rulers 21a, 21a and horizontal fixed ruler 20
b, and a pair of vertically movable rulers 21b, 21b movably provided on the horizontal fixed ruler 20b.

The fixed ruler 20 is attached and fixed to the side or bottom of the detection plate 11 via support members 22.
As a result, the load of the detection ruler 19 is not applied to the load cells 12 and the positional relationship with respect to the load cells 12 is fixed. The fixed XY rulers 20a and 20a and the horizontal fixed rulers 20b and 20b constituting the fixed ruler 20 are provided with X-Y preset in advance.
A scale (not shown) corresponding to the coordinate scale is provided. Here, the scale provided on the fixed ruler 20 is formed by a line segment indicating a unit length in this example.

The horizontally movable rulers 21a, 21a and the vertically movable rulers 21b, 21b are fixed vertically by guide members 23, 23 provided at both ends thereof.
Between the horizontal fixed rulers 20b, 20b,
The guide members 23, 23 are provided so as to be movable along the length direction thereof by running the guide members 23, 23 with the vertical or horizontal fixed ruler to which each is attached as a rail. The inner edges of the horizontally movable rulers 21a and 21a and the vertically movable rulers 21b and 21b have the positions of the vertical fixed rulers 20a and 20a or the horizontal fixed ruler 20a.
Indicator pieces 24 for indicating where on the scales b and 20b are located are provided at both ends. The horizontal movable ruler 21a and the vertical movable ruler 21b
Means that each of the guide members 23 does not interfere with each other.
Are formed to have different heights, and are thereby configured to be stepped.

The arithmetic means 13 amplifies the detection signal from the load cells 12 by the amplifier 16 and
The unnecessary frequency band is cut off by this, and the signal subjected to AD conversion by the AD converter 18 is input, whereby the position of the center of gravity is calculated in real time, that is, in real time from the load received by each load cell 12.
The load is continuously detected by the load cells 12..., But the calculation means 13 calculates the load every unit time such as 0.5 seconds, 1.0 seconds or 2.0 seconds, that is, intermittently. Then, the position of the center of gravity is calculated. And
The data of the position of the center of gravity obtained as a result of the intermittent processing in this way is displayed continuously (intermittently in a microscopic manner) by the display device 15 composed of a CRT or the like, thereby starting the measurement. Figure 3 shows the movement of the center of gravity from time
Is displayed as a locus K as shown in FIG.

The XY coordinate position storage means 14 includes a conversion function 14a for converting the position of the center of gravity calculated by the calculation means 13 into a position on the XY coordinate set in advance, and a conversion function 14a for storing the converted XY coordinate position in advance. And a storage function 14b for storing as a number of XY coordinates recognized for each set unit time. Here, the preset XY coordinates correspond to the scale provided on the fixed ruler 20 of the detection ruler 19 described above, and of course, the X axis is parallel to the horizontal fixed ruler 20b, and the Y axis is Is the vertical fixed ruler 20a
It is set to be parallel to. Note that this XY
The coordinates are also displayed on the display device 15 as shown in FIG.

In this example, as shown in FIG.
A number of XY coordinate position stored by the coordinate position storage unit 14, X-coordinate position, respectively, for each Y coordinate position thereof Rights
Seeking equalizing calculating an average XY coordinate position, determining means 25 for determining a calculated average XY coordinate positions to the center of gravity center position is provided. This determining means 25 calculates a large number of XY coordinate positions stored by the XY coordinate position storing means 14,
Find the average for each X coordinate position and Y coordinate position
The output function 25b includes a calculation function 25a for calculating an average XY coordinate position, and an output function 25b for determining the average XY coordinate position obtained by the calculation function 25a as the center of gravity center and outputting this position as a signal. Is sent to the display device 15, and the locus K of the center of gravity is
At the same time, the center of gravity G0 can be displayed in the trajectory K. This determining means 2
Reference numeral 5 is stored in an arithmetic processing unit (computer) or an auxiliary storage device such as a magneto-optical disk, similarly to the XY coordinate position storage means 14.

Here, the calculating means 25a and the output function 2
5b is a measurement time or XY coordinate position storage means 14
When the number of data obtained by the above reaches a preset time or number, the average XY coordinate position is automatically calculated and the result is output. Therefore, for example, the measurement time (training time) is not changed. At the set time,
After completion of the measurement (training), the center of the position of the center of gravity being measured is output.

Note that the center of gravity sway meter 10 of the present embodiment includes a calculating means 13, an XY coordinate position storing means 14, and a determining means 25.
Is provided with a printer (not shown), whereby the same data as the image displayed on the display device 15, that is, the XY coordinates, the locus of the center of gravity, and the center of gravity are printed out. It has become so.

Next, a method of measuring the position of the center of gravity of a patient (subject) for rehabilitation using the center of gravity sway meter 10 having such a configuration will be described. In this example, the entire measurement time is used as it is as the set time for activating the calculation function 25a and the output function 25b of the determination unit 25.

First, a patient is placed on the detection plate 11 and FIG.
As shown in FIG.
b, the positions of both sides of both feet are respectively vertically movable rulers 21
Similarly, the front and rear positions of both feet are sandwiched between the laterally movable rulers 21a and 21a, and the front and rear positions of both feet are similarly corresponded to the inner edges of the laterally movable rulers 21a and 21a. Then, at that position, the X coordinate position on the scale of the horizontal fixed ruler 20b indicated by the pointing piece 24 of the vertical movable rulers 21b, 21b is read, and the vertical fixed ruler 20a indicated by the pointing piece 24 of the horizontal movable rulers 21a, 21a is read. The Y coordinate position on the scale is read. Further, the average value of the two X coordinate positions and the average value of the two Y coordinate positions thus obtained are calculated, and the XY coordinate position of the average value is calculated.
The center point between both feet . In addition, about the obtained center point, this is calculated by the calculating means 13, the XY coordinate position storing means 14,
By inputting from the input means such as a keyboard (not shown) to the computer system constituting the deciding means 25, it is displayed on the XY coordinates of the display device 15.

After the center point between both feet is determined in this way, the measurement system switch of the sway meter 10 is turned on in that state. Then, the load applied to both feet of the patient is detected by the four load cells 12..., And the respective detection signals are sent to the calculation means 13 via the amplifier 16, the filter 17, and the AD converter 18. The calculation means 13 receives each of the sent detection signals, and calculates the position of the center of gravity of the patient at predetermined unit time from the load received by each of the load cells 12 by the same processing as the conventional center of gravity sway meter. And
The obtained result is sent to the display device 15 and displayed.
Therefore, on the display device 15, the position of the center of gravity calculated by the calculating means 15 is sequentially displayed, whereby the movement of the center of gravity of the patient after the start of the measurement is displayed as a locus K in FIG.

The position of the center of gravity calculated in this way by the calculating means 13 is converted by the converting function 14a of the XY coordinate position storing means 14 into a position on the XY coordinate set in advance. It is stored as a number of recognized XY coordinates. When the center-of-gravity position measurement is completed, calculation function 15a, output function 15b is activated, X-coordinate position, respectively, by calculating function 15a from the stored number of XY coordinates, the average obtained for each Y-coordinate positions, the average XY
A coordinate position is calculated. Further, the calculated average XY coordinate position is determined as the center of gravity center position G0 by the output function 15b, and the position is displayed together with the locus K of the center of gravity position by the display device 15 or the printer as shown in FIG. The center point between both feet, which are calculated are previously measured, i.e., the true center of gravity G, by input from the keyboard or the like, is displayed by the display device 15 and a printer with the trajectory K and the center of gravity center position G0 You.

In such a center of gravity sway meter 10, the display device 15 determines the positional relationship between the obtained center point between both feet , that is, the true center of gravity position G and the locus K of the center of gravity position. It can be understood at a glance from the top or printed out. Therefore, if the center point of the figure surrounded by the outline of the trajectory K is set as the center of gravity, the positional relationship between the true center of gravity and the center of gravity is examined. be able to.

Further, a deciding means 25 is provided, whereby the average of the XY coordinates calculated by the calculating means 13 and stored in the XY coordinate position storing means 14 is calculated.
Since it is determined to be 0, even if the center of gravity of the patient moves momentarily during the measurement, for example, the position of the center of gravity detected at that time is instantaneous and is recognized and stored every unit time. Since the detected value has a low frequency, the detected value does not greatly affect the determination of the center of gravity, and the obtained center-of-gravity center position G0 substantially matches the original center of gravity. It will be. Therefore, since the center of gravity center position G0 substantially coincident with the original center of gravity can be compared with the true center of gravity G, the recovery state of the patient can be more accurately checked.

In the embodiment, the scale of the detection ruler 19 is scaled by a line segment, and the X coordinate and the Y coordinate are read by measuring. However, for example, a resistor is provided as a scale on a fixed ruler. The center point detecting means may be constituted by using a so-called potentiometer mechanism for detecting the position of the movable ruler by detecting a voltage by applying a constant current to the reference position and each movable ruler.

Further, a magnetic body magnetized to the S pole and a magnetic body magnetized to the N pole are alternately arranged for each unit length as a scale, and a magnetic head is provided at a position where the movable ruler slides on the scale surface. In addition, a magnetic scale mechanism is used to measure the moving distance of the magnetic head from a reference point on the scale by counting the number of peaks of the electromotive force generated when the magnetic head slides on the magnetic material surface. In this case, the movable ruler is always slid from the reference position, and the amount of movement is detected to calculate the X and Y coordinates of the movable ruler. The center point of is detected.

FIG. 4 is a view showing another embodiment of the present invention. In FIG. The difference between the center of gravity sway meter 30 and the center of gravity sway meter 10 shown in FIG.
Numerous pressure-sensitive sensors 3 arranged in a matrix in place of
Are provided. Each of the pressure-sensitive sensors 31 is formed in a square shape having a side of about 1 to 5 mm, and is provided inside the detection plate 32 at a position where the load cells 12 are embedded. It is configured to have a square shape. In addition, a line A corresponding to the outline of the pressure-sensitive sensors 31 arranged in a matrix is drawn on the surface of the detection plate 32, so that when the patient gets on the detection plate 32, If both feet are aligned, the feet are always positioned above the pressure-sensitive sensors 31.

Each of the pressure-sensitive sensors 31 is turned on when a pressure is sensed, that is, when a pressure equal to or more than a predetermined value is applied to the surface thereof, and when no pressure is applied, the pressure sensor 31 is turned on.
This is a type that becomes FF. Each of these pressure-sensitive sensors 31 is arranged at a position corresponding to a preset position on the XY coordinate, and the position can be recognized as the XY coordinate.

A maximum / minimum calculation means 33 is connected to each of the pressure-sensitive sensors 31, and a center point calculation means 34 is sequentially connected to the maximum / minimum calculation means 33. The maximum / minimum calculation means 33 detects which of the pressure-sensitive sensors 31... Has been turned ON, and calculates the largest X coordinate and Y coordinate and the smallest X coordinate and Y coordinate among those turned on. This is for detecting the pressure-sensitive sensor 31 provided. Further, the center point calculating means 34 calculates the average value of the obtained maximum and minimum X coordinates and the obtained maximum and minimum Y coordinate, and stores the calculated X coordinate and Y coordinate points between the two feet.
In addition to recognizing the center point , a signal corresponding to the recognized XY coordinates is output to the display device 15, a printer, or the like. In this embodiment, the pressure sensor 31
.., The maximum / minimum calculation means 33 and the center point calculation means 34 constitute a center point detection means.

In order to measure the position of the center of gravity of the patient (subject) using such a center of gravity sway meter 30, first, the patient is placed on the detection plate 11 without operating the pressure-sensitive sensors 31. As shown in FIG. 4, both feet are aligned inside the line A. Then, the pressure sensors 31 are operated in this state. Then, the pressure-sensitive sensor 31 receiving the foot pressure because the foot rides directly on the foot is turned ON, and the pressure-sensitive sensor 31 not receiving the foot pressure is turned OFF. Then, upon receiving a signal from the pressure-sensitive sensor 31 that has been turned ON, the maximum / minimum calculation means 33 detects the maximum / minimum X-coordinate and Y-coordinate.
The center point calculating means 34 calculates a center point between both feet from the Y coordinate, and outputs a signal corresponding to the center point to the display device 1.
5 so that the display device 15 displays the center point between both feet , that is, the true center of gravity, on the XY coordinates.

In addition, the load received by each of the load cells 12 is detected separately, and the locus of the position of the center of gravity and the center position of the center of gravity are detected in the same manner as in the center of gravity sway meter 10 shown in FIG. 15 and a printer.

In such a center of gravity sway meter 30, the center of gravity between both feet obtained in the same manner as the center of gravity sway meter 10 shown in FIG.
The center point , that is, the positional relationship between the true center of gravity position and the locus of the center of gravity position can be easily recognized on the display device 15 or from the printed out, so that the true center of gravity position and the center of gravity center position can be determined. Can be checked. In addition, since the center of gravity sway meter 30 detects the center point between the two feet only by putting the foot on the detection plate 32, the operation is easier than the center of gravity sway meter 1 shown in FIG.

In the embodiment shown in FIG. 4, the pressure-sensitive sensors 31 are used as sensors for detecting the feet of the subject. However, for example, a heat-sensitive sensor may be used instead. May be configured such that when a foot is put on these thermal sensors, the skin temperature is sensed and the thermal sensors are turned on. In the above-described embodiment, the center of gravity sway meter of the present invention is mainly used for rehabilitation.However, it can also be used for measuring the center of gravity of a subject in fields such as exercise engineering and ergonomics. Of course.

Further, in the above-described embodiment, the determination means 25 is provided. However, it is needless to say that the determination means 25 is not provided, so that the center point of the figure surrounded by the outline of the locus of the center of gravity may be set as the center of gravity center. In addition, the determination means 25 is not constituted only by the calculation function 25a and the output function 25b. For example, a large number of XY coordinate data recognized and stored by the calculation means 13 can be used to calculate a statistical abnormal value (for example, an average value). (A value outside the range of plus / minus three times the standard deviation) is added to the determining means 25, and the center of gravity center position is calculated from the remaining data only by the calculation function 25a and the output function 25b. May be required. This is because such an abnormal value is not always a value caused by the subject itself, but often occurs based on some external factor.

[0039]

As described above, the gravity center sway meter according to the first aspect of the present invention is mounted on the detection plate.
Since a center point detecting means for detecting where the center point between both feet is on a preset XY coordinate is provided, the center point between both feet is previously determined by the center point detecting means. > Is detected in advance, and the obtained center point between both feet is compared with the center-of-gravity center position calculated from the center-of-gravity position calculated by the arithmetic means and further stored as XY coordinates by the XY coordinate position storage means. , Between the legs considered to be the true center of gravity
Of the center of gravity and the calculated center of gravity can be checked. Therefore, whether the standing posture itself is basically in a tilted state, and if it is tilted, it is possible to move left, right, front and back You can find out which one is inclined.

Further, the center point detecting means, a longitudinal fixed ruler and horizontal fixed ruler disposed orthogonally to the vertical and horizontal, the vertical fixed ruler provided substantially orthogonal, and the length direction of said longitudinal fixed ruler A pair of horizontally movable rulers provided movably along
A pair of vertically movable rulers are provided substantially perpendicular to the horizontal fixed ruler, and the pair of vertically movable rulers are provided movably along the length direction of the horizontal fixed ruler.
Since the scale corresponding to the XY coordinates corrected in advance is provided respectively, the examinee puts both feet on the detection plate, and then sandwiches both sides of both feet with a pair of vertically movable rulers. In addition, the front and rear of both feet are sandwiched by a pair of horizontal movable rulers, and in that state, the position of the edge of each movable ruler on the subject side is read or detected from the scale provided on the vertical and horizontal fixed rulers, and further obtained results are obtained. By calculating the center point between both feet from, it is possible to detect where the center point between both feet is located on the XY coordinates. Therefore, it is possible to check the positional relationship between the obtained center point between both feet , that is, the true center of gravity position and the obtained center of gravity center position.

According to a second aspect of the present invention, the center-of-gravity fluctuation meter includes a large number of sensors provided in a matrix on a detection plate corresponding to predetermined XY coordinates.
In addition, since the sensor is constituted by a sensor for detecting whether or not the subject's foot is positioned on the surface thereof, the largest X coordinate and Y coordinate among the sensors that detect the foot are used. , And the sensor corresponding to the smallest X coordinate and Y coordinate, respectively, and calculating the center point between both feet from these coordinates, the center point between both feet becomes X−
The position on the Y coordinate can be detected. Therefore, it is possible to check the positional relationship between the obtained center point between both feet , that is, the true center of gravity position and the obtained center of gravity center position.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing one embodiment of a center of gravity sway meter of the present invention.

FIG. 2 is a plan view showing a schematic configuration of a detection plate and a center point detection ruler in the center of gravity sway meter shown in FIG. 1;

FIG. 3 is a diagram showing a locus of the center of gravity obtained by the center of gravity sway meter shown in FIG. 1;

FIG. 4 is a schematic configuration diagram showing another embodiment of the center of gravity sway meter of the present invention.

FIG. 5 is a schematic configuration diagram showing an example of a conventional center of gravity sway meter.

FIG. 6 is a diagram showing a locus of a center of gravity position obtained by the center of gravity sway meter shown in FIG. 5;

[Explanation of symbols]

10, 30 Gravitational sway meter 11, 32 Detection plate 12 Load cell (load detection means) 13 Calculation means 14 XY coordinate position storage means 19 Center point detection ruler (Center point detection means) 20 Fixed ruler 20a Vertical fixed ruler 20b Horizontal fixed ruler 21a Horizontal movable ruler 21b Vertical movable ruler 31 Pressure sensor 33 Maximum / minimum calculation means 34 Center point calculation means

Claims (2)

(57) [Claims] 1. A detection plate on which both feet of a subject are put together, and a plurality of load detectors provided on the detection plate for continuously or intermittently detecting the center of a total load applied to both feet of the subject. Means, calculating means for calculating the position of the center of gravity of the subject based on the detection signals from the load detecting means, and converting the position of the center of gravity calculated by the calculating means into a position on a preset XY coordinate. XY coordinate position storage means for storing this as XY coordinates, and the center point between both feet placed on the detection plate is
A center point detection hand that detects where on the XY coordinates
A step is provided, and the center point detecting means is arranged vertically and horizontally.
Vertical and horizontal fixed rulers
The ruler is provided substantially perpendicular to the ruler, and the vertical fixed ruler
A pair of laterally movable plates provided so as to be movable along the length direction
A ruler and a horizontal fixed ruler are provided substantially orthogonal to the horizontal fixed ruler.
A pair of rulers movably provided along the length of the ruler
A vertical movable ruler and a horizontal fixed ruler.
The scale corresponding to the XY coordinates is set in each rule.
A center of gravity sway meter characterized by being eccentric. 2. A detection plate on which both feet of a subject are put together, and a plurality of load detectors provided on the detection plate for continuously or intermittently detecting the center of a total load applied to both feet of the subject. Means, calculating means for calculating the position of the center of gravity of the subject based on the detection signals from the load detecting means, and converting the position of the center of gravity calculated by the calculating means into a position on a preset XY coordinate. XY coordinate position storage means for storing this as XY coordinates, and the center point between both feet placed on the detection plate is
A center point detection hand that detects where on the XY coordinates
A step is provided, and the center point detecting means is provided with the X-
Provided in a matrix on the detection plate corresponding to the Y coordinate
Consisting of a number of sensors, and the sensors
Sensor that detects whether the subject's feet are
A center of gravity sway meter characterized in that it is constituted.