Myoelectric potential measurement system, myoelectric potential measurement method, and program

Abstract

[Problem] To stably bring electrodes that measure myoelectric potential signals into contact with the body of a user. [Solution] This myoelectric potential measurement system comprises: a ring-shaped attachment part that is attached to the body of a user; a plurality of electrode groups that are provided to be spaced apart from each other in the circumferential direction of the attachment part and that acquire potential signals from the body by being brought into contact with the body in the radial direction of the attachment part; and an expansion / contraction control unit that controls the expansion / contraction states of a plurality of expansion / contraction parts that expand and contract in the circumferential direction or the radial direction of the attachment part in order to control the contact states between the body and the plurality of electrode groups.

Claims

1. An electromyography measurement system comprising: a ring-shaped attachment part that is attached to the user's body; a plurality of electrode groups provided spaced apart from each other in the circumferential direction of the attachment part, which acquire potential signals from the body by contacting the body in the radial direction of the attachment part; and a stretch control unit that controls the stretching state of a plurality of stretchable parts that stretch in the circumferential or radial direction of the attachment part in order to control the contact state between the plurality of electrode groups and the body.

2. The electromyography measurement system according to claim 1, wherein the stretching control unit controls the stretching state based on the potential signals acquired by the plurality of electrode groups from the body.

3. The electromyography measurement system according to claim 1, further comprising an electromyography acquisition unit that acquires electromyographic signals of the body based on the potential signals acquired by each of the plurality of electrode groups from the body.

4. The electromyography measurement system according to claim 3, further comprising an estimation unit that estimates the movement of the body using a recognition model that takes the acquired electromyographic signals as input.

5. The electromyography measurement system according to claim 4, wherein the stretching control unit controls the stretching state based on the estimated movement of the body.

6. The electromyography measurement system according to claim 4, wherein the stretching control unit controls the stretching state based on the body movements that the user is expected to perform.

7. The electromyography measurement system according to claim 1, further comprising a sensor unit for detecting the position of the attachment portion, wherein the stretching control unit controls the stretching state based on the force or acceleration applied to the attachment portion sensed by the sensor unit.

8. The electromyography measurement system according to claim 1, wherein the plurality of expandable portions are provided between each of the plurality of electrode groups and the attachment portion, and the plurality of electrode groups are expanded and contracted in the radial direction toward the body.

9. The electromyography measurement system according to claim 8, further comprising a plurality of stretch control mechanisms that allow each of the plurality of stretchable parts to stretch independently of each other.

10. The electromyography measurement system according to claim 1, wherein the plurality of expandable portions are provided between the plurality of electrode groups in the circumferential direction, and each of the plurality of electrode groups is moved to expand and contract relative to the others in the circumferential direction.

11. The electromyography measurement system according to claim 10, further comprising a stretch control mechanism for stretching and contracting the plurality of stretchable parts collectively.

12. The electromyography measurement system according to claim 1, wherein each of the electrode group includes at least a first electrode, a second electrode, and a reference electrode provided along the muscle fibers of the body.

13. The electromyography measurement system according to claim 1, wherein the stretching control unit controls the stretching state so that the plurality of electrode groups and the body are in a constant contact state.

14. A method for measuring electromyography, comprising: acquiring an electrical potential signal from a user's body using a plurality of electrode groups provided spaced apart from each other in the circumferential direction of a ring-shaped attachment portion worn on the user's body, and each electrode group contacting the body in the radial direction of the attachment portion; and controlling the expansion and contraction state of a plurality of expandable and contractible portions of the attachment portion that expand and contract in the circumferential or radial direction using a computer in order to control the contact state between the plurality of electrode groups and the body.

15. A program to cause a computer to function as: an electromyographic signal acquisition unit that acquires electromyographic signals of the body based on the potential signals of the body acquired by a plurality of electrode groups that are spaced apart from each other in the circumferential direction of a ring-shaped attachment part attached to the user's body and that each electrode group is in contact with the body in the radial direction of the attachment part; and a stretch control unit that controls the stretching and contracting state of a plurality of stretchable parts that stretch in the circumferential or radial direction of the attachment part in order to control the contact state between the plurality of electrode groups and the body.

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