JP6673582B2 - Motion measuring device, method, and program - Google Patents

Description

  The present invention relates to a motion measuring device, a method, and a program for recognizing a motion and a posture of a wearer based on a change in electrical resistance of a conductive elastic material accompanying deformation of clothes worn on a human body.

As a technique for detecting a motion of a wearer of a garment, a cloth with a strain sensor disclosed in Patent Literature 1 is known.
The strain sensor-equipped fabric has a stretchable fabric body, and a strain sensor attached to the fabric body and capable of following the expansion and contraction of the fabric body. The strain sensor is provided integrally with the fabric body. And a wiring portion that is deformed following the expansion and contraction of the fabric body.

However, the stretchability of the fabric with a strain sensor disclosed in Patent Document 1 depends on the substrate made of synthetic resin, rubber, nonwoven fabric, metal, etc., and does not match the stretchability of the fabric body. There is a problem that it is difficult to accurately detect the state of expansion and contraction of clothing that changes depending on the posture of the user.
Further, in the fabric with a strain sensor disclosed in Patent Literature 1, when the area of the sensor arranged on the clothing is large, there is a problem that air permeability is hindered by the substrate, and there is also a problem that it cannot be worn on a daily basis. Was.

And in order to solve such a problem, in recent years, a technique of using a conductive stretchable material for clothes made of stretchable fabric has been proposed.
In this garment, a posture detecting cloth woven with a conductive elastic material for converting a change in the stretch state of the elastic cloth into a change in electric characteristics is used, and the electric characteristic detected by the posture detecting cloth is used. The change of the posture of the wearer can be detected based on the change of the wearer.

This conductive elastic material is sewn or woven into clothes, and its electrical resistance changes as the body surface expands and contracts as the wearer's posture changes.
This change in electric resistance is converted into a voltage, and after A / D conversion, the value is read by a microcomputer. For example, as shown by a region M1 in FIG. 7A, when the back muscles are stretched and the posture is good, the stretch of the conductive elastic member is small, and the resistance value at that time is 30Ω.
On the other hand, as shown by the area M2 in FIG. 7 (A), when the back is rounded and the back is turned into a cat back, the stretch of the conductive elastic material is assumed to be large and 70Ω.
Here, when it is assumed that the conductive elastic material does not expand or contract due to breathing, the difference in the resistance value becomes 40Ω as it is, and by detecting this change, the posture of the stoop can be detected. Since the difference in the resistance value detected by the conductive elastic material changes depending on the depth of the stoop, the degree of the stoop can be expressed for each stage based on the difference in the resistance value.

JP 2014-25180 A

However, in the clothing using the conductive elastic material, as can be seen with reference to an actual data example shown in FIG. ), The resistance value also fluctuates, and its cycle greatly fluctuates depending on the respiration speed.
For this reason, in the above-mentioned garment, even if the average value of the resistance value of the conductive elastic material is taken, a certain sampling time for averaging must be secured, and real-time performance is lacking. In addition, in the above-mentioned clothes, if the magnitude of breathing is subjected to periodic fluctuations, it is difficult to detect a correct resistance value and it is difficult to detect the degree of posture at each stage.

  The present invention has been made in view of the above-described circumstances, and eliminates the influence of large or small (depth) or periodic fluctuation of breathing with a simple configuration to accurately determine a posture of a wearer such as a stoop. Provided are a motion measuring device, a method, and a program that can be detected.

In order to solve the above problems, the present invention proposes the following means.
The present invention relates to a motion measuring device provided on a part of a sheet material mounted on a human body to measure a motion of a wearer, wherein the conductive expansion and contraction includes a plurality of linear bodies along a deformation direction of the sheet material. An electric resistance value from the linear body, wherein the linear bodies are incorporated into the sheet material so that the linear bodies are parallel to each other, and the respective electric resistances are changed by deformation of the sheet material in a plane direction. Computing means for computing the difference between the two, and measuring means for measuring the action of the wearer from the computation result of the computing means.

  ADVANTAGE OF THE INVENTION This invention enables the posture detection of the wearer which eliminated the influence of respiration by the simple structure of arrange | positioning several linear bodies which form electroconductive elastic material in parallel.

It is a schematic structure figure showing the operation measuring device concerning the present invention. It is a schematic structure figure showing the operation measuring device concerning the embodiment of the present invention. FIG. 2 is a diagram illustrating a bridge circuit in which the conductive elastic member of FIG. 1 is installed, and a calculation unit and a measurement unit connected to the bridge circuit. It is a graph which shows the electric resistance value from the linear body which comprises a conductive elastic material. FIG. 9 is a diagram illustrating a first modification example according to the embodiment of the present invention. FIG. 9 is a diagram illustrating a modification 2 according to the embodiment of the present invention. It is a graph which shows the electric resistance value of clothing using a conductive elastic material, (A) is a graph based on an assumption, (B) is an actual graph.

The present invention will be described with reference to FIG.
In FIG. 1, reference numeral 1 denotes clothing worn on a human body, and a sheet material 2 constituting the clothing 1 is provided with a motion measuring device 10 for measuring the motion of the wearer.
The motion measuring device 10 includes a conductive elastic member 12 having a plurality of linear members 11, each of which has an electric resistance that changes according to deformation of the linear member 11, and a linear member 11 of the conductive elastic member 12. Computing means 13 for computing the difference between the electric resistance values of the above, and measuring means 14 for measuring the movement of the wearer from the computation result of the computing means 13.
In addition, in the conductive elastic member 12 of this example, an example is shown in which a pair of linear bodies 11A and 11B are installed as the plurality of linear bodies 11.
The arithmetic means 13 and the measuring means 14 are arranged in the microcomputer C. The microcomputer C may be installed on the clothes 1, or may be installed outside the clothes 1 via communication means (not shown). May be.

The linear members 11A and 11B of the conductive elastic member 12 are incorporated into the garment 1 so as to be parallel to each other along the deformation direction of the sheet material 2 and to be parallel to the surface direction of the sheet material 2. Each electric resistance changes by the deformation. At this time, the lengths of the linear bodies 11A and 11B of the conductive elastic members 12 are made different, and the electrical resistances of the respective linear bodies 11A and 11B in the initial state (the state where they are not deformed by external force) are made different. Thus, different levels of electrical resistance can be detected.
The calculating means 13 calculates the difference between the electric resistance values of the conductive elastic members 12 from the linear bodies 11A and 11B, and the measuring means 14 measures the wearer's movement from the calculation result of the calculating means 13.

The motion measuring device 10 configured as described above has a pair of linear bodies 11A and 11B that are parallel to each other along the deformation direction of the sheet material 2 of the garment 1, and the surface of the sheet material 2 The conductive stretchable material 12 whose electric resistance changes depending on the deformation in the direction is incorporated in the garment 1.
After that, the motion measuring device 10 calculates the difference between the electrical resistance values of the conductive elastic members 12 and the linear bodies 11A and 11B, and the measuring unit 14 calculates Measure the operation of
In other words, the motion measuring device 10 calculates the difference in electrical resistance between the pair of linear bodies 11A and 11B of the conductive elastic member 12 to thereby determine the effect of the magnitude (depth) or period variation of breathing. By excluding it, it becomes possible to accurately detect the posture of the wearer such as becoming a stoop.
In addition, the motion measuring device 10 calculates a difference in electric resistance value between the linear bodies 11A and 11B in a state where the pair of linear bodies 11A and 11B included in the conductive elastic member 12 are arranged in parallel. Is performed, the posture of the wearer can be detected without the influence of respiration.

(Embodiment)
An embodiment of the present invention will be specifically described with reference to FIGS.
As shown in FIG. 2, a motion measuring device 20 for measuring a motion of a wearer is provided on the sheet material 2 constituting the clothing 1.
The motion measuring device 20 includes a pair of linear members 21, a conductive elastic member 22 whose electric resistance changes by deformation of the linear members 21, and a linear member 21 of the conductive elastic member 22. And a measuring means 24 for measuring the wearer's movement from the calculation result of the calculating means 23.

In addition, in the conductive elastic member 22 of this example, an example is shown in which a pair of linear bodies 21A and 21B is installed as the plurality of linear bodies 21.
The arithmetic means 23 and the measuring means 24 are arranged in the microcomputer C1, but the microcomputer C1 may be installed on the clothes 1, or may be installed outside the clothes 1 via communication means (not shown). May be.

As shown in FIG. 2, the conductive stretchable member 22 is composed of a pair of linear bodies 21 </ b> A and 21 </ b> B having different lengths, and extends along the deformation direction of the sheet material 2 so as to be parallel to each other. Specifically, it is composed of a short linear body 21A and a long linear body 21B, and when the wearer wears the clothes 1, the central portion of the back of the wearer Are arranged so as to be substantially horizontal.
The linear bodies 21A and 21B of the conductive elastic member 22 change their electrical resistance due to the deformation of the sheet material 2 of the garment 1 in the surface direction. The obtained electric resistance value is supplied to the calculating means 23.
At this time, since the linear bodies 21A and 21B of the conductive elastic members 22 have different lengths, different levels of electrical resistance are detected.
The calculating means 23 calculates the difference between the electric resistance values of the conductive elastic members 22 having different lengths from the linear bodies 21A and 21B, and the measuring means 24 calculates the difference of the wearer from the calculation result of the calculating means 23. Measure posture or movement.

As a specific configuration of the arithmetic unit 23, as shown in FIG. 3, a pair of linear bodies 21A and 21B constituting the conductive elastic member 22 are arranged on one side of the two bridge circuits 30, respectively. In each bridge circuit 30, fixed resistors 31 are installed on three sides where the linear bodies 21A and 21B are not arranged, and another fixed resistor 31 is installed on one side where the linear bodies 21A and 21B are arranged. An adjustment resistor 32 is connected to the balance.
Further, the comparator 23A of the calculating means 23 calculates the difference between the voltages generated at the ends of the bridge circuits in accordance with the change in the electric resistance of the linear bodies 21A and 21B of each bridge circuit 30. Then, the operation of the wearer is measured from the calculation result of the calculation means 23.
In other words, the motion measuring device 20 calculates a potential difference caused by a change in the electric resistance value of the conductive elastic member 22 from the pair of linear bodies 21A and 21B, thereby detecting the magnitude (depth) or periodic fluctuation of breathing. By removing the influence, the posture or movement of the wearer, such as a stoop, can be measured.
In addition, as another configuration of the arithmetic unit 23, the comparator 23A may be arranged in each of two bridge circuits. A method may be adopted in which the difference between the voltages generated in each case is taken into the microcomputer C1, and after the A / D conversion is performed inside the microcomputer C1, digital data is calculated by a program to obtain the difference between the voltages.

Here, referring to FIG. 4, a method for detecting the posture of the wearer by removing the influence of breathing based on the electric resistance value of the conductive elastic member 22 from the pair of linear bodies 21A and 21B will be described. .
In FIG. 4, as shown by a region M1, a time region when the stretch of the conductive elastic member 22 is small due to the posture in which the spine is good to stretch is represented by M1. The time region in which the stretch of the elastic stretch member 22 is large is represented by M2.

As described above, in the present embodiment, a pair of linear bodies 21A and 21B having different lengths are arranged in parallel.
The electrical resistance values of these two linear bodies 21A and 21B are not the same, and a slight difference is made in the electrical resistance value by providing a difference in the wiring length. The electric resistance is converted into a voltage and read. When the electric resistance is low, the voltage is low, and when the electric resistance is high, the voltage is high. In this way, when the arithmetic means 23 subtracts the voltage value of the lower electric resistance value from the voltage value of the higher electric resistance value, a difference between the voltage values is obtained.

  Further, since the pair of linear members 21A and 21B of the conductive elastic member 22 are arranged in parallel with each other, expansion and contraction due to breathing are equally reflected on the two linear members 21A and 21B. For this reason, when the voltage value of the linear body 21A having the lower electric resistance value is subtracted from the voltage value of the linear body 21B of the one conductive elastic member 22 (for example, the electric resistance value is higher), the original value is obtained. Only the voltage value difference S is taken out, and the influence part of respiration can be excluded.

The change in the electric resistance value when the wearer wearing the clothing 1 having the above-described conductive elastic member 22 stretches his / her back and leans back will be described below.
As described with reference to FIG. 2, the clothes 1A and 21B of the conductive elastic member 22 have different lengths, and the clothes 1 are arranged so as to be parallel to each other along the deformation direction of the sheet material 2. When the wearer wears the clothes 1, it is arranged so as to be substantially horizontal at the center of the back of the wearer.
For this reason, in a case where the straight posture with the back muscles straightened and the back is shifted from the time region M1 to the time region M2, the conductive elastic member 22 has a linear body longer than the short linear body 21A. 21B has a larger elongation. This is because the difference between the electric resistances of the linear bodies 21A and 21B is wider than that of the case where the back muscles are stretched when the cat becomes a cat. As a result, in the case of a stoop, a difference S obtained by converting to a voltage value and subtracting is generated, that is, a constant difference S ( An electric resistance difference S) will be generated.

  Then, the measuring means 24 compares the above-described voltage difference S with a preset reference value (a reference difference value indicating that the cat has turned down), thereby eliminating the influence of respiration and the posture ( (When the back is stretched or when the cat becomes hunched).

The linear bodies 21A and 21B of the conductive elastic member 22 described above are knitted fabrics having a constant width in which conductive yarns are woven into elastic yarns. It is composed by inlay knitting and tangling.
As a technique related to the conductive stretchable member 22, for example, a stretchable conductive fiber disclosed in Japanese Patent Application Laid-Open No. 2010-209481, in which a core is made of a fiber that is hardly impregnated with iodine and a sheath is made of a fiber that is easily impregnated with iodine, or Japanese Patent Application Laid-Open No. 2010-31423 discloses a conductive fiber having a conductive layer made of copper iodide in the vicinity of the inside of a surface side of a fiber, or a stretchable elastic yarn disclosed in Japanese Patent Application Laid-Open No. 2011-74538 and a carbon fiber and a sheath. A conductive wire or the like in which a yarn is twisted is used.
Then, when the knitted fabric in which the conductive elastic material is woven is pulled or bent, the above-described posture is measured by using the characteristic that the cross-sectional area decreases and the electric resistance increases. .
Note that the above-mentioned publication is merely an example, and a conductive elastic material having a configuration other than the above, for example, a property having electrical characteristics in which contact resistance between a plurality of conductive elastic materials woven into a knitted fabric changes. What is used can also be used.

  Further, the knitted fabric constituting the linear bodies 21A and 21B of the conductive elastic member 22 may be knitted on the sheet material 2 of the garment 1, or may be attached to the sheet material 2 of the garment 1, The form is not limited.

The motion measuring device 20 configured as described above has a pair of linear bodies 21A and 21B that are parallel to each other in the direction of deformation of the sheet material 2 of the garment 1 and have different lengths. The conductive stretchable member 22 whose electric resistance changes due to the deformation of the sheet material 2 in the plane direction is incorporated in the clothing 1.
Thereafter, the motion measuring device 20 calculates the difference between the electrical resistance values from the linear bodies 21A and 21B, and the measuring means 24 measures the wearer's motion from the calculation result of the calculating means 23. I did it.
That is, the motion measuring device 20 eliminates the influence of the magnitude (depth) of breathing or the periodic fluctuation by calculating the difference between the electric resistance values of the conductive elastic member 22 from the pair of linear bodies 21A and 21B. As a result, it is possible to accurately detect the posture of the wearer, such as being stooped.
In addition, the motion measuring device 20 determines the difference in electrical resistance between the linear bodies 21A and 21B in a state where the linear bodies 21A and 21B of different lengths forming the conductive elastic member 22 are arranged in parallel. With the simple configuration of performing the calculation process, it is possible to detect the posture of the wearer while eliminating the influence of respiration.

<< Modification 1 >>
In the above embodiment, the parallel linear bodies 21A and 21B having different lengths of the conductive elastic member 22 are incorporated into the clothes 1, and when the wearer wears the clothes 1, the center of the back of the wearer is used. It was arranged to be horizontal to the part.
However, the present invention is not limited to this. As shown in FIG. 5, when the linear members 21 </ b> C and 21 </ b> D having different lengths of the conductive elastic member 22 are the arm portions of the clothes 1 and the wearer wears them. May be arranged at the base of the wearer's arm.
Thus, the arithmetic unit 23 and the measuring unit 24 can detect a posture change such as raising and lowering of the wearer's arm.
Further, the configuration in which the linear members 21C and 21D of the conductive elastic member 22 shown in FIG. 5 are provided on the arm portion of the garment 1 is different from the linear member 21A of the conductive elastic member 22 shown in FIG. -You may use together with the structure which provides 21B in parallel with the back part of the clothing 1.

<< Modification 2 >>
In addition, the present invention is not limited to the first modification, and as shown in FIG. 6, linear bodies 21E and 21F having different lengths of the conductive elastic members 22 are vertically arranged on the back of the garment 1 so as to be parallel to each other. When the wearer wears the garment 1, the garment 1 may be arranged so as to be substantially perpendicular to the back surface of the garment 1 of the wearer.
Thus, the arithmetic unit 23 and the measuring unit 24 may detect a posture change such as a twist of the wearer's body.
Further, the arrangement of the linear bodies 21E and 21F of the conductive elastic member 22 shown in FIG. 6 may be used in combination with the configuration shown in FIG. 2 and / or FIG.
Further, the technology of the present invention can be used not only for simply measuring the posture and the movement of the wearer, but also as an input means for operating a smartphone or a computer based on the measured movement or posture.

  As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to the embodiments, and includes design changes and the like without departing from the gist of the present invention.

  The present invention relates to a motion measuring device for recognizing a posture of a wearer using a conductive elastic material whose electric resistance changes due to deformation of clothes worn on a human body.

DESCRIPTION OF SYMBOLS 1 Clothes 2 Sheet material 10 Motion measuring device 11 (11A / 11B) Linear body 12 Conductive elastic material 13 Calculation means 14 Measurement means
Reference Signs List 20 motion measuring device 21 (21A to 21F) linear body 22 conductive elastic member 23 calculating means 24 measuring means 30 bridge circuit 31 fixed resistance 32 adjustment resistance

Claims (5)

A motion measuring device provided on a part of a sheet material to be mounted on a human body and measuring a motion of a wearer,
It has a conductive stretchable member composed of a plurality of linear bodies along the deformation direction of the sheet material, and is incorporated in the sheet material so that the linear bodies are parallel to each other, and is arranged in a plane direction of the sheet material. Calculating means for calculating a difference in electric resistance value from the linear body in which each electric resistance changes by deformation;
Have a, a measuring means for measuring the movement of the wearer from the calculation result of this calculation means,
The motion measuring device, wherein the conductive elastic member is constituted by a pair of linear bodies having different lengths and arranged in parallel . The pair of linear members constituting the conductive elastic member are respectively arranged on one side of the bridge circuit,
2. The motion measuring apparatus according to claim 1 , wherein said calculating means fetches an electric resistance value output from an end of each of said bridge circuits, and calculates a difference between said electric resistance values. The operation measuring device according to claim 2 , wherein an adjusting resistor is provided on one side of the bridge circuit to balance with another fixed resistor. A motion measuring method for measuring a motion of a wearer by deformation of a sheet material mounted on a human body,
A plurality of lines having different lengths and being incorporated in the sheet material so as to be parallel to each other along the deformation direction of the sheet material, and the respective electric resistances are changed by the deformation of the sheet material in the surface direction. Calculating the difference in the electrical resistance value of the conductive elastic member made of a state body,
Measuring the motion of the wearer from the calculation result. An operation measurement program for measuring an operation of a wearer by deformation of a sheet material attached to a human body,
A plurality of lines having different lengths and being incorporated in the sheet material so as to be parallel to each other along the deformation direction of the sheet material, and the respective electric resistances are changed by the deformation of the sheet material in the surface direction. Calculating the difference between the electrical resistance value of the conductive elastic member made of a state body,
Measuring the movement of the wearer from the calculation result.

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