JP2017123911A - Motion measuring device, method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motion measuring device that removes influence such as breathing magnitude (depth) or periodic variation, and accurately detects wearer's posture and motion such as stooping.SOLUTION: A motion measuring device 10 is provided in a sheet material 2 attached to a human body and measures wearer's motion. The motion measuring device has: calculation means 13 having a conductive stretchable material 12 comprising multiple linear members 11 (11A, 11B) along the deformation direction of the sheet material 2, incorporated in the sheet material 2 so that the linear members 11 may become parallel to each other, and calculating a difference of an electric resistance value from the linear members 11 where each electric resistance changes by deformation to the surface direction of the sheet material 2; and measuring means 14 for measuring the wearer's motion from calculation results of this calculation means 13.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a motion measuring device, method, and program for recognizing a wearer's motion and posture 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 the movement of a wearer of a garment, a fabric with a strain sensor shown in Patent Document 1 is known.
The fabric with a strain sensor includes a stretchable fabric body and a strain sensor attached to the fabric body and capable of following the stretch of the fabric body. The strain sensor is provided integrally with the fabric body. And it is the structure provided with the wiring part which deform | transforms following the expansion-contraction of a fabric main body.

However, the stretch performance of the fabric with a strain sensor shown in Patent Document 1 depends on the substrate made of synthetic resin, rubber, nonwoven fabric, metal, etc., and does not match the stretch performance of the fabric body. There is a problem that it is difficult to accurately detect the stretched state of the clothes that changes depending on the posture.
Further, in the fabric with a strain sensor shown in Patent Document 1, there is a problem that if the sensor area arranged on the clothing is increased, the air permeability is hindered by the substrate, and there is a problem that it cannot be worn on a daily basis. It was.

And in order to solve such a problem, the technique which uses an electroconductive elastic material for the clothing comprised with elastic fabric in recent years is proposed.
This garment uses a posture detection fabric in which a conductive elastic material that converts a change in the stretched state of the stretch fabric into a change in electrical characteristics is used, and the electrical characteristics detected by the posture detection fabric The change in the posture of the wearer can be detected based on the change in the wearer.

This conductive elastic material is sewn or woven into clothing, and its electrical resistance changes following the body surface expansion and contraction accompanying changes in the posture of the wearer.
This change in electrical resistance is converted into a voltage, and the value is read by a microcomputer after AD conversion. For example, as shown by a region M1 in FIG. 7A, when the back is stretched and the posture is good, it is assumed that the stretch of the conductive elastic material is small and the resistance value at that time is 30Ω.
On the other hand, as shown by a region M2 in FIG. 7A, when the back is rounded and becomes a dorsum, the stretch of the conductive stretch material is assumed to be 70Ω.
Here, when it is assumed that there is no expansion / contraction of the conductive elastic material due to respiration, the difference in resistance value is 40Ω as it is, and by detecting this change, the position of the stoop can be detected. Since the difference in resistance value detected by the conductive stretchable material changes depending on the depth of the dorsum, the degree of the dorsum can also be expressed for each stage based on the difference in resistance value.

JP 2014-25180 A

However, in the garment using the conductive stretchable material, as can be seen with reference to the actual data example shown in FIG. 7B, when the wearer is breathing, the magnitude of the breathing (depth) ), The resistance value also fluctuates, and the cycle varies greatly depending on the speed of breathing.
For this reason, even if the average value of the resistance value of the conductive stretchable material is taken, the garment has to secure a certain sampling time for averaging, and lacks real-time properties. Further, in the above-described clothes, when a periodic variation is applied to the magnitude of breathing, it is difficult to detect a correct resistance value and it is difficult to detect the degree of posture for each stage.

  The present invention has been made in view of the above-described circumstances, and eliminates the influence of respiration magnitude (depth) or periodic fluctuations with a simple configuration, so that the posture of the wearer, such as a stoop, can be accurately determined. An operation measuring apparatus, method, and program capable of being detected are provided.

In order to solve the above problems, the present invention proposes the following means.
The present invention is a motion measuring device that is provided on a part of a sheet material to be worn on a human body and measures a wearer's motion, and is a conductive stretch composed of a plurality of linear bodies along the deformation direction of the sheet material. An electrical resistance value from the linear body that is incorporated in the sheet material so that the linear bodies are parallel to each other and the respective electrical resistances are changed by deformation in the surface direction of the sheet material And calculating means for measuring the wearer's movement from the calculation result of the calculating means.

  The present invention makes it possible to detect the posture of the wearer excluding the influence of respiration by a simple configuration in which a plurality of linear bodies forming a conductive elastic material are arranged in parallel.

It is a schematic block diagram which shows the motion measuring apparatus which concerns on this invention. It is a schematic block diagram which shows the motion measurement apparatus which concerns on embodiment of this invention. It is a figure which shows the bridge circuit in which the electroconductive elastic material of FIG. 1 is installed, the calculating means connected to this bridge circuit, and a measurement means. It is a graph which shows the electrical resistance value from the linear body which comprises a conductive elastic material. It is a figure which shows the modification 1 which concerns on embodiment of this invention. It is a figure which shows the modification 2 which concerns on embodiment of this invention. It is a graph which shows the electrical resistance value of the garment using a conductive elastic material, Comprising: (A) is a graph based on assumption, (B) is an actual graph.

The present invention will be described with reference to FIG.
What is indicated by reference numeral 1 in FIG. 1 is a garment worn on a human body, and a sheet material 2 constituting the garment 1 is provided with a motion measuring device 10 for measuring the motion of the wearer.
The motion measuring apparatus 10 includes a plurality of linear bodies 11, a conductive stretchable material 12 whose electric resistance is changed by deformation of the linear body 11, and the linear stretched body 11 of the conductive stretchable material 12. Calculation means 13 for calculating the difference between the electrical resistance values, and measurement means 14 for measuring the operation of the wearer from the calculation result of the calculation means 13.
In addition, in the electroconductive elastic material 12 of this example, the example by which a pair of linear body 11A * 11B was installed as the some linear body 11 is shown.
The computing means 13 and the measuring means 14 are arranged in the microcomputer C. However, the microcomputer C may be installed on the clothes 1 or installed outside the clothes 1 through communication means (not shown). May be.

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

And in the motion measuring apparatus 10 comprised as mentioned above, it has a pair of linear body 11A * 11B along the deformation | transformation direction of the sheet | seat material 2 of the clothes 1, and mutually parallel, The surface of this sheet | seat material 2 The conductive elastic material 12 whose electric resistance is changed by deformation in the direction is incorporated into the garment 1.
Thereafter, the motion measuring apparatus 10 calculates the difference in electrical resistance value from the linear bodies 11A and 11B of the conductive stretchable material 12, and the measuring means 14 calculates the wearer from the calculation result of the calculating means 13. Measure the behavior.
In other words, the motion measuring device 10 calculates the difference in the electrical resistance value from the pair of linear bodies 11A and 11B of the conductive stretchable material 12, thereby affecting the influence of the magnitude (depth) or period fluctuation of respiration. This eliminates the possibility of accurately detecting the posture of the wearer, such as a stoop.
In addition, the motion measuring apparatus 10 calculates a difference in electrical resistance value from the linear bodies 11A and 11B in a state where the pair of linear bodies 11A and 11B included in the conductive stretchable material 12 are arranged in parallel. With this simple configuration, it is possible to detect the posture of the wearer excluding the influence of respiration.

(Embodiment)
An embodiment of the present invention will be specifically described with reference to FIGS.
As shown in FIG. 2, the sheet material 2 constituting the garment 1 is provided with a motion measuring device 20 that measures the motion of the wearer.
The motion measuring device 20 includes a pair of linear bodies 21, a conductive stretchable material 22 whose electric resistance is changed by deformation of the linear bodies 21, and a linear body 21 of the conductive stretchable material 22. Calculation means 23 for calculating the difference between the electrical resistance values, and measurement means 24 for measuring the operation of the wearer based on the calculation result of the calculation means 23.

In addition, in the electroconductive elastic material 22 of this example, the example by which a pair of linear body 21A * 21B was installed as the some linear body 21 is shown.
The computing 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 installed outside the clothes 1 through communication means (not shown). May be.

As shown in FIG. 2, the conductive stretchable material 22 is composed of a pair of linear bodies 21 </ b> A and 21 </ b> B having different lengths, and along the deformation direction of the sheet material 2 and 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 garment 1, the center portion of the wearer's back It is arranged so as to be almost horizontal.
Further, the linear bodies 21A and 21B of the conductive stretchable material 22 change their electric resistances by deformation in the surface direction of the sheet material 2 of the garment 1, and the linear bodies 21A and 21B The obtained electrical resistance value is supplied to the calculation means 23.
At this time, since the linear bodies 21A and 21B of the conductive stretchable material 22 have different lengths, different levels of electrical resistance are detected.
The computing means 23 computes the difference in electrical resistance value from the linear bodies 21A and 21B of the conductive elastic material 22 having different lengths, and the measuring means 24 calculates the wearer's Measure posture or movement.

As a specific configuration of the calculation means 23, as shown in FIG. 3, a pair of linear bodies 21 </ b> A and 21 </ b> B constituting the conductive stretchable material 22 are respectively arranged on one side of the two bridge circuits 30. In each bridge circuit 30, fixed resistors 31 are installed on three sides where the linear bodies 21A and 21B are not disposed, and other fixed resistors 31 are disposed on one side where the linear bodies 21A and 21B are disposed. An adjustment resistor 32 is connected to balance the above.
Further, the comparator 23A of the calculating means 23 calculates the difference in voltage generated at the end of the bridge circuit in accordance with the change in the electrical resistance of the linear bodies 21A and 21B of each bridge circuit 30, and further adds to the measuring means 24. 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 the potential difference associated with the change in the electrical resistance value from the pair of linear bodies 21A and 21B of the conductive stretchable material 22 so that the respiration level (depth) or the period fluctuations can be calculated. Therefore, it is possible to measure the posture or movement of the wearer such as becoming a back of the cat.
As another configuration of the calculation means 23, the comparator 23A may be arranged in each of two bridge circuits. It is also possible to obtain the voltage difference by fetching the voltage difference generated in each into the microcomputer C1, performing AD conversion inside the microcomputer C1, and then calculating digital data by a program.

Here, referring to FIG. 4, a method for detecting the wearer's posture by removing the influence of respiration based on the electrical resistance values from the pair of linear bodies 21 </ b> A and 21 </ b> B of the conductive stretchable material 22 will be described. .
In FIG. 4, as indicated by the region M1, the time region when the stretch of the conductive elastic material 22 is small due to the posture in which the back muscles may be stretched is represented by M1, and the back is curled to become the back of the cat. A time region where the elongation of the elastic stretch material 22 is large is represented by M2.

And as above-mentioned, in this embodiment, a pair of linear body 21A * 21B of different length is arrange | positioned in parallel.
The electric resistance values of these two linear bodies 21A and 21B are not the same, and a slight difference is given to the electric resistance values by making a difference in wiring length. The electric resistance value is converted into a voltage and read. When the electric resistance value is low, the voltage is low, and when the electric resistance value is high, the voltage is converted high. As a result, when the calculation means 23 subtracts the voltage value having the lower electric resistance value from the voltage value having the higher electric resistance value, a difference between the voltage values is obtained.

  Further, since the pair of linear bodies 21A and 21B of the conductive stretchable material 22 are arranged in parallel to each other, the expansion and contraction due to respiration is equally reflected in these two linear bodies 21A and 21B. For this reason, when the voltage value of the linear body 21A having the lower electrical resistance value is subtracted from the voltage value of the linear body 21B (for example, the one having the higher electrical resistance value) of one conductive stretchable material 22, the original Only the difference S between the voltage values is taken out and the affected part of the breath can be eliminated.

A change in the electrical resistance value when the wearer who wears the garment 1 including the conductive stretch material 22 described above stretches his back and becomes a dorsum is described below.
As described with reference to FIG. 2, the linear bodies 21 </ b> A and 21 </ b> B of the conductive stretchable material 22 have different lengths, and the clothes 1 so as to be parallel to each other along the deformation direction of the sheet material 2. When the wearer wears the garment 1, the wearer wears the garment 1 and is arranged so as to be substantially horizontal at the central portion of the wearer's back.
For this reason, when going straight from the straight posture with the back straight and moving from the time region M1 to the time region M2, the linear member that is longer than the short linear member 21A in the conductive elastic member 22 is used. 21B has a larger elongation. This is because the difference in electrical resistance value between the linear body 21A and the linear body 21B is wider than the difference in electrical resistance value when the back muscles are stretched when lying on the back. As a result, when the dorsum is stooped, a difference S that is converted into a voltage value and subtracted is generated. That is, a constant difference S () between the voltage difference when the spine is extended and the voltage difference when the stoop is stretched. A difference S) of the electric resistance value is generated.

  Then, the measuring means 24 compares the above-described voltage difference S with a preset reference value (reference difference value indicating that the dog is lying behind), thereby eliminating the influence of respiration and posture ( Measurements can be taken when the back is stretched or when the back is stooped.

The above-described linear bodies 21A and 21B of the conductive elastic material 22 are knitted fabrics having a constant width in which conductive yarns are knitted into elastic yarns. For example, the elastic yarns are zigzag with a constant width in the loops of the conductive yarns. It is composed by inlaying and entwining.
As a technique relating to the conductive stretch material 22, for example, a stretchable conductive fiber in which a core portion disclosed in Japanese Patent Application Laid-Open No. 2010-209482 is a fiber that is not easily impregnated with iodine and a sheath portion is a fiber that is easily impregnated with iodine, or A conductive fiber having a conductive layer made of copper iodide in the vicinity of the inside of the surface side of the fiber shown in JP 2010-31423 A, or a carbon fiber and a sheath on a stretchable elastic yarn shown in JP 2011-74538 A A conductive wire in which yarns are twisted together is used.
Then, when the knitted fabric in which these conductive stretch materials are knitted is pulled or bent, the above-described posture is measured by utilizing the characteristic that the cross-sectional area decreases and the electrical resistance increases. .
In addition, the above-mentioned publication is an example, and has a property of having an electrical characteristic that a contact resistance between a plurality of conductive stretch materials knitted in a knitted fabric is changed. What is used can also be used.

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

The motion measuring device 20 configured as described above has a pair of linear bodies 21A and 21B having different lengths along the deformation direction of the sheet material 2 of the garment 1 and being parallel to each other. The conductive elastic material 22 whose electric resistance is changed by deformation in the surface direction of the sheet material 2 is incorporated in the garment 1.
Thereafter, the motion measuring device 20 calculates the difference in electrical resistance value 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.
In other words, the motion measuring device 20 calculates the difference in electrical resistance value between the pair of linear bodies 21A and 21B of the conductive elastic material 22, thereby eliminating the influence of the magnitude (depth) of breathing or periodic fluctuations. Thus, it is possible to accurately detect the posture of the wearer such as the back of the cat.
In addition, the motion measuring device 20 calculates the difference in electrical resistance value from the linear bodies 21A and 21B in a state where the linear bodies 21A and 21B of different lengths forming the conductive stretchable material 22 are arranged in parallel. With a simple configuration of performing the calculation process, it is possible to detect the posture of the wearer excluding the influence of respiration.

<< Modification 1 >>
In the above embodiment, the parallel linear bodies 21A and 21B having different lengths of the conductive elastic material 22 are incorporated into the garment 1, and when the wearer wears the garment 1, the center of the back of the wearer. It arrange | positioned so that it might become horizontal in a part.
However, the present invention is not limited to this, and as shown in FIG. 5, when the linear members 21 </ b> C and 21 </ b> D having different lengths of the conductive elastic material 22 are the arms of the clothes 1 and worn by the wearer It may be arranged at the base of the wearer's arm.
Thereby, the calculation means 23 and the measurement means 24 can detect a posture change such as raising and lowering of the wearer's arm.
Further, the configuration in which the linear bodies 21C and 21D of the conductive stretchable material 22 shown in FIG. 5 are provided on the arm portion of the garment 1 is the linear body 21A of the conductive stretchable material 22 shown in FIG. -You may use together with the structure which provides 21B in parallel with the back part of the clothes 1. FIG.

<< Modification 2 >>
Moreover, it is not limited to the modification 1, As shown in FIG. 6, the linear bodies 21E and 21F having different lengths of the conductive stretch material 22 are arranged vertically on the back surface of the garment 1 so that they are parallel to each other. It may be incorporated so that when the wearer wears the garment 1, it may be arranged so as to be substantially perpendicular to the back surface portion of the garment 1 of the wearer.
Thereby, the calculation means 23 and the measurement means 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 stretchable material 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 to measure the posture and movement of the wearer but also as input means for operating a smartphone or a computer according to the measured movement or posture.

  As mentioned above, although embodiment of this invention was explained in full detail with reference to drawings, the concrete structure is not restricted to this embodiment, The design change etc. of the range which does not deviate from the summary of this invention are included.

  The present invention relates to a motion measurement device that recognizes the posture of a wearer using a conductive elastic material whose electrical resistance changes due to deformation of clothes worn on a human body.

DESCRIPTION OF SYMBOLS 1 Clothes 2 Sheet material 10 Motion measuring apparatus 11 (11A * 11B) Linear body 12 Conductive elastic material 13 Calculation means 14 Measurement means
DESCRIPTION OF SYMBOLS 20 Operation | movement measuring apparatus 21 (21A-21F) Linear body 22 Conductive elastic material 23 Calculation means 24 Measuring means 30 Bridge circuit 31 Fixed resistance 32 Resistance for adjustment

Claims (6)

An operation measuring device that is provided on a part of a sheet material to be worn on a human body and measures the movement of the wearer
It has a conductive stretchable material composed of a plurality of linear bodies along the deformation direction of the sheet material, and is incorporated into the sheet material so that the linear bodies are parallel to each other, in the surface direction of the sheet material A computing means for computing a difference in electrical resistance value from the linear body in which each electrical resistance changes due to deformation;
And a measuring means for measuring the motion of the wearer from the calculation result of the calculating means.   The motion measuring apparatus according to claim 1, wherein the conductive stretchable material is configured by a pair of linear bodies that are arranged to be different in length and parallel to each other. A pair of linear bodies constituting the conductive stretch material are respectively disposed on one side of the bridge circuit,
The said calculating means takes in the electrical resistance value each output from the edge part of each said bridge circuit, and calculates the difference of this electrical resistance value, Either of Claim 1 or 2 characterized by the above-mentioned. Motion measuring device.   4. The motion measuring apparatus according to claim 3, wherein an adjustment resistor is installed on one side of the bridge circuit to balance with another fixed resistor. An operation measurement method for measuring the operation of a wearer by deformation of a sheet material attached to a human body,
A plurality of lines whose lengths are different from each other and are 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 change by deformation in the surface direction of the sheet material. A step of calculating a difference in electrical resistance value of the conductive stretch material made of a state body;
And a step of measuring the operation of the wearer from the calculation result. A motion measurement program for measuring a wearer's motion by deformation of a sheet material worn on a human body,
A plurality of lines whose lengths are different from each other and are 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 change by deformation in the surface direction of the sheet material. A step of calculating a difference in electrical resistance value of the conductive stretch material made of a state body;
And a step of measuring the operation of the wearer from the calculation result.

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