TW202341934A - Wearable electromyography device - Google Patents

Abstract

A wearable electromyography device includes a garment, a fabric electrode, and an insulating film. The garment includes a plurality of anchor structures on a first surface of the garment and a plurality of holes penetrating the garment. The fabric electrode is disposed on the first surface of the garment. The insulating film is disposed on the first surface of the garment and seals the peripheral of the fabric electrode. A segment of the garment without being covered by the insulating film has a first elastic extension rate. A segment of the garment being covered by the insulating film has a second elastic extension rate. The first elastic extension rate is greater than the second elastic extension rate.

Description

Wearable myoelectric sensing device

The present disclosure relates to a wearable myoelectricity sensing device.

In recent years, human-computer interaction, as a means that combines various virtual reality technologies, motion sensing technologies, biological feedback technologies, etc., has developed rapidly in the field of sports rehabilitation. The method of using myoelectric signal feedback control to realize human-computer interaction can not only increase the user's interest in participating in rehabilitation training through interaction on the human-computer interaction interface, but also extract useful information from complex bioelectrical signals. Track and evaluate the user's neuromuscular condition to improve rehabilitation efficiency.

Existing myoelectric sensing devices mostly attach electrodes to the user's body through wear. However, during actual exercise, sweat or muscle contraction often causes the fabric to slip or stretch and deform, causing the electrodes to shift, thus distorting the measured myoelectric signal and making it unusable.

According to an embodiment of the present invention, a wearable myoelectric sensing device is provided, including a fabric carrier, fabric electrodes and an insulating film. The fabric carrier includes an anchoring structure disposed on a first surface of the fabric carrier and a mesh extending through the fabric carrier. The fabric electrode is arranged on the first surface of the fabric carrier. The insulating film is disposed on the first surface of the fabric carrier and encapsulates the periphery of the fabric electrode, wherein the area of the fabric carrier that is not covered with the insulating film has a first elastic stretch rate, and the area of the fabric carrier that is covered with the insulating film has a second elasticity. The first elastic stretch rate is greater than the second elastic stretch rate.

In some embodiments, the first elastic stretch rate is 130% to 160%.

In some embodiments, the second elastic stretch rate is 110%~120%.

In some embodiments, the mesh is distributed between anchoring structures.

In some embodiments, the fabric carrier includes a first part and a second part, and the distribution density of the mesh in the first part is greater than the distribution density of the mesh in the second part.

In some embodiments, the anchoring structures are anti-slip yarns woven into the fabric carrier.

In some embodiments, the wearable myoelectric sensing device further includes a strap connected to the fabric carrier.

In some embodiments, the wearable myoelectric sensing device further includes a conductive component, which is disposed on the fabric carrier and coupled to the fabric electrode.

In some embodiments, the wearable myoelectric sensing device further includes a wireless transmission module coupled to the conductive component.

In some embodiments, the wearable myoelectric sensing device further includes a fabric cable connecting the fabric electrode and the conductive member, wherein the insulating film covers the fabric cable.

The wearable myoelectric sensing device provided by the present invention can solve the problem of electrode displacement caused by the slippage or stretching deformation of cloth during exercise, so that the electrodes can be stably maintained on the correct muscle groups during muscle exercise. It does not move and helps measure myoelectric signals to improve the accuracy of motion analysis.

The following drawings and detailed descriptions will clearly illustrate the spirit of the present invention. Anyone with ordinary skill in the art can make changes and modifications based on the techniques taught in the present invention after understanding the preferred embodiments of the present invention. without departing from the spirit and scope of the invention.

The wearable myoelectric sensing device provided by the present invention can solve the problem of electrode displacement caused by cloth slipping or stretching and deformation during exercise, allowing the electrodes to be arranged in the correct position, which helps to improve the accuracy of motion analysis.

Refer to Figure 1, which is a schematic diagram of an embodiment of the wearable myoelectric sensing device of the present invention. The wearable myoelectric sensing device 100 includes a fabric carrier 110 , a fabric electrode 140 and an insulating film 150 . The fabric carrier 110 includes a plurality of anchoring structures 120 disposed on the first surface 112 of the fabric carrier 110 , and a plurality of anchor structures 120 that penetrate the fabric carrier 110 . Multiple mesh 130. The fabric electrode 140 is disposed on the first surface 112 of the fabric carrier 110 . Specifically, the wearable myoelectric sensing device 100 faces the user's skin with the first surface 112 of the fabric carrier 110 so that the fabric electrodes 140 measure the myoelectric signal. The insulating film 150 is disposed on the first surface 112 of the fabric carrier 110 and encapsulates the periphery of the fabric electrode 140 . The area of the fabric carrier 110 not covered with the insulating film 150 has a first elastic stretch rate, and the area of the fabric carrier 110 covered with the insulating film 150 has a second elastic stretch rate, and the first elastic stretch rate is greater than the second elastic stretch rate. Elastic stretch rate.

Please refer to Figure 1 and Figure 2 at the same time. Figure 2 is a schematic diagram of an embodiment of the wearable myoelectric sensing device of the present invention when it is stretched. When wearing the wearable myoelectric sensing device 100 for exercise, the user will experience muscle contraction/elongation when exerting force, causing the fabric carrier 110 to deform accordingly, as shown in Figure 2 . At this time, the anchoring structure 120 disposed on the first surface 112 of the fabric carrier 110 will grab the user's skin to maintain its relative position to the skin, so that the wearable myoelectric sensing device 100 will not loosen easily. In other words, even if the user's skin is deformed due to muscle stretching, the anchoring structure 120 will still be held in a specific position relative to the skin, and cause the fabric carrier 110 to deform in the same amount in the direction of skin stretching.

In some embodiments, anchor structure 120 is a structure with a high coefficient of static friction. For example, the fabric carrier 110 equipped with the anchor structure 120 is tested. The glass sheet is tilted at 20 degrees, the cloth sample is 10cm×10cm, and a weight of 155g is added above. The measured maximum static friction coefficient of the anchor structure 120 is: 0.45~0.50. If the maximum static friction coefficient of the anchoring structure 120 is lower than 0.45, the anchoring structure 120 may lose its ability to grasp the user's skin. If the maximum static friction coefficient of the anchoring structure 120 is higher than 0.50, the anchoring structure 120 may lose its ability to grasp the user's skin. Causing discomfort to the user. In some embodiments, the anchoring structure 120 may be an anti-slip yarn woven into the fabric carrier 110 .

When the anchoring structure 120 grabs the user's skin and causes the fabric carrier 110 to deform in the direction of skin extension, the mesh 130 provided on the wearable myoelectric sensing device 100 will be stretched, so that the fabric carrier 110 can be smoothly The ground is stretched.

In some embodiments, the mesh 130 can be distributed between the anchoring structures 120 such that when the fabric carrier 110 is stretched and the anchoring structures 120 remain in the same position on the skin, the mesh 130 can be forced open to expand. The fabric carrier 110 is deformed accordingly. In some embodiments, the area ratio of the mesh 130 to the fabric carrier 110 is 10% to 15%. If the area ratio of the mesh 130 to the fabric carrier 110 is less than 10%, it may prevent the fabric carrier 110 from being stretched. If the area ratio of the mesh 130 to the fabric carrier 110 is greater than 15%, the wearable myoelectric sensing device 100 may not be able to adhere to the user's skin surface. The aforementioned area ratio of the mesh 130 to the fabric carrier 110 is measured when the wearable myoelectric sensing device 100 is not stretched by external force.

Because the elastic stretch rate of the area of the fabric carrier 110 not covered with the insulating film 150 is greater than the elastic stretch rate of the area of the fabric carrier 110 covered with the insulating film 150 , the periphery of the fabric electrode 140 is limited to poor elastic stretch. rate resulting in smaller deformation. Therefore, when the fabric carrier 110 deforms, the deformation of the fabric electrode 140 and its periphery is less obvious, so the fabric electrode 140 can be held at the same position on the user's skin, thereby reducing the sensing error of the wearable myoelectric sensing device 100 .

In some embodiments, the original elastic stretch rate (ie, the first elastic stretch rate) of the fabric carrier 110 is 130% to 160%, and the elastic stretch rate (ie, the first elastic stretch rate) of the fabric carrier 110 after being attached to the insulating film 150 (2) Elastic stretch rate) is 110%~120%. The elastic stretch rate is measured through the ASTM D5035-09 standard test method, and the elastic stretch rate of the fabric carrier 110 attached to the insulating film 150 refers to the overall elasticity after the insulating film 150 is thermally pressed onto the fabric carrier 110 Stretch ratio. In some embodiments, the material of the insulating film 150 may be thermoplastic polyurethane (TPU).

Referring to Figures 3A and 3B, Figure 3A is a diagram of myoelectric signals measured during exercise using an embodiment of the wearable myoelectric sensing device of the present invention, and Figure 3B is a diagram of myoelectric signals measured using the wearable myoelectric sensing device of the present invention. The electromyographic signal diagram measured during exercise by another wearable myoelectric sensing device with the same version of the electrical sensing device, but without the anchoring structure, mesh, and insulating film.

After these two wearable myoelectric sensing devices of the same version were worn at the same position on the subject's body, the subject jumped on the spot every ten seconds for a total of three times. The measured myoelectric signal diagram is shown in Figure 3A Figure 3B. It can be seen from Figure 3A that the wearable myoelectric sensing device provided by the present invention can measure a very clear and obvious target feature P1. On the contrary, it can be seen from Figure 3B that in addition to the target feature P2 during jumping, the signal measured by another wearable myoelectric sensing device also adds a lot of noise N1, and the intensity of these noise N1 Enough to affect the accuracy of myoelectric signal measurement.

Therefore, the wearable myoelectric sensing device of the present invention can enable the fabric electrode to stably hold and contact the user's body at the same position during the user's movement through the anchor structure, mesh and partial covering of the insulating film around the fabric electrode. skin, thereby greatly improving the accuracy of the myoelectric signals it measures.

Refer to Figures 4A and 4B, which are respectively a front view and a wearing schematic diagram of another embodiment of the wearable myoelectric sensing device of the present invention. The wearable myoelectric sensing device 200 includes a fabric carrier 210, a fabric electrode 240, and an insulating film 250. The fabric carrier 210 includes a plurality of anchor structures 220 disposed on the first surface 212 of the fabric carrier 210, and a plurality of anchor structures 220 that penetrate the fabric carrier 210. Multiple mesh 230. The fabric electrode 240 is disposed on the first surface 212 of the fabric carrier 210 , and the insulating film 250 is disposed on the first surface 212 of the fabric carrier 210 and encapsulates the periphery of the fabric electrode 240 , and does not cover the area of the fabric carrier 210 that is not covered by the insulating film 250 The first elastic stretch rate of is greater than the second elastic stretch rate of the area of the fabric carrier 210 covering the insulating film 250 .

In some embodiments, the number of fabric electrodes 240 is multiple. For example, the fabric electrode 240 includes a first differential electrode pair 242, a second differential electrode pair 244, and a reference electrode 246, wherein the first differential electrode pair 242 and the second differential electrode pair 244 are respectively arranged to correspond to Pairs of muscles are picked up, and the position of the reference electrode 246 corresponds to a position with less muscle activity, such as the side of the limb. The electrodes in the first differential electrode pair 242 and the second differential electrode pair 244 are elongated and arranged in parallel. The axial direction of the first differential electrode pair 242 and the second differential electrode pair 244 will be substantially perpendicular to the direction of the muscle to facilitate sensing of myoelectric signals.

In some embodiments, the wearable myoelectric sensing device 200 further includes a plurality of conductive members 260, a plurality of fabric cables 270 and a wireless transmission module 280, wherein the plurality of fabric cables 270 are used to connect the fabric electrodes 240 to Corresponding conductive member 260, and the wireless transmission module 280 is coupled to the conductive member 260. In this way, the signal measured by the fabric electrode 240 can be transmitted to the wireless transmission module 280 through the fabric cable 270 and the conductive member 260, and the wireless transmission module 280 can then transmit the signal to other processing units for processing.

In some embodiments, the fabric ribbon 270 is sewn on the first surface 212 of the fabric carrier 210 , or the fabric ribbon 270 can be woven into the fabric carrier 210 through knitting. The insulating film 250 covers the fabric cable 270 to encapsulate the fabric cable 270 between the fabric carrier 210 and the insulating film 250 .

In some embodiments, the wearable myoelectric sensing device 200 may further include a strap 290. When the wearable myoelectric sensing device 200 is put on the user's limb, the strap 290 may surround the user's limb and fix the wearable muscle. The electrical sensing device 200 is on the user's body. In some embodiments, the strap 290 is an elastic self-adhesive strap, for example, the strap 290 is provided with Velcro felt.

Referring to Figure 5, which is a front view of another embodiment of the wearable myoelectric sensing device of the present invention. The wearable myoelectric sensing device 300 includes a fabric carrier 310, a fabric electrode 340, and an insulating film 350. The fabric carrier 310 includes a plurality of anchor structures 320 disposed on the first surface 312 of the fabric carrier 310, and a penetrating fabric carrier 310. Multiple mesh 330. The fabric electrode 340 is disposed on the first surface 312 of the fabric carrier 310 , and the insulating film 350 is disposed on the first surface 312 of the fabric carrier 310 and encapsulates the periphery of the fabric electrode 340 , and does not cover the area of the fabric carrier 310 that is not covered by the insulating film 350 The first elastic stretch rate of is greater than the second elastic stretch rate of the area of the fabric carrier 310 covering the insulating film 350 .

In some embodiments, the distribution density of the mesh 330 on the fabric carrier 310 can be adjusted according to different configuration positions. For example, if it is observed that the deformation of the wearable myoelectric sensing device 300 in a specific part 302 is more obvious than in other parts 304, the design of the fabric carrier 310 can be adjusted so that this part 302 has more mesh. Hole 330. In other words. That is to say, the distribution density of the mesh 330 in this part 302 is greater than the distribution density of the mesh 330 in other parts 304, so that the wearable myoelectricity sensing device 300 can be deformed more smoothly. In some embodiments, portion 302 is a portion corresponding to greater muscle mass.

Refer to Figures 6A and 6B, which are respectively a tissue diagram and a schematic diagram of a yarn loop of an embodiment of a fabric carrier in the wearable myoelectric sensing device of the present invention. In some embodiments, the fabric carrier 400 may be a flat knitted fabric structure, which is formed by yarns 410, including anti-slip yarns and elastic yarns, passing through the front row of needles and the back row of needles to form yarn loops. At the position where the mesh 420 is intended to be formed, the yarn loops can be moved away, and the mesh 420 can be formed there. For example, if you want to form the mesh 420 at the 4th and 5th needles, you can move the yarn loop originally scheduled at the 4th needle to the 3rd needle, and move the yarn loop originally scheduled at the 5th needle. The yarn loop is moved to the 6th needle, and the positions of the 4th and 5th needles are vacated to form mesh 420.

Referring to Figures 7A and 7B, which are organizational diagrams of another embodiment of the fabric carrier in the wearable myoelectric sensing device of the present invention. In other embodiments, the fabric carrier 500 is a warp-knitted fabric structure, in which the basic unit U1 includes pairs of elastic yarns 510 as warp yarns, and the anti-slip yarns 520 are wrapped around the elastic yarns 510 On the surface, the stretch rate of the elastic yarn 510 is greater than the stretch rate of the anti-slip yarn 520 , and the static friction coefficient of the anti-slip yarn 520 is greater than the static friction coefficient of the elastic yarn 510 . In some embodiments, the wire diameter of the elastic yarn 510 is also larger than the wire diameter of the anti-slip yarn 520, and the elastic yarn 510 can be, for example, a rubber yarn.

The floating yarn 530 is wound on the anti-slip yarn 520 , and the floating yarn 530 is only wound on the anti-slip yarn 520 located on the outer surface of the fabric carrier 500 . In other words, the floating yarn 530 is not disposed on the anti-slip yarn 520 on the inner surface of the fabric carrier 500 , so that the fabric carrier 500 still contacts the wearer's skin with the anti-slip yarn 520 . The wire diameter of the floating yarn 530 may be smaller than the wire diameter of the anti-slip yarn 520 , and the looping density of the floating yarn 530 may be greater than the looping density of the anti-slip yarn 520 . In this way, the part of the floating yarn 530 exposed on the outer surface of the fabric carrier 500 can be directly used as the bonding position of the binding tape 290 in Figure 4A.

In these embodiments, two adjacent basic units U1 can be connected through the connecting yarn 540 . Specifically, as shown in Figure 7A, the connecting yarn 540 can connect the anti-slip yarns 520 in the two adjacent basic units U1, but as shown in Figure 7B, the connecting yarn 540 is not arranged at the position of the mesh 550. To connect two adjacent basic units U1, the mesh 550 can be formed on the fabric carrier 500.

The wearable myoelectric sensing device provided by the present invention can solve the problem of electrode displacement caused by slipping or stretching and deformation of cloth during exercise, so that the electrodes can be stably held on the correct muscle group during muscle exercise without causing any problems. It can move or slide, so it helps to improve the measurement stability of myoelectric signals and thereby improve the accuracy of motion analysis.

Although the present invention has been disclosed above through embodiments, they are not intended to limit the present invention. Anyone skilled in the art can make various modifications and modifications without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention is The scope shall be determined by the appended patent application scope.

100,200,300: Wearable myoelectric sensing device 110,210,310,400,500: Fabric carrier 112,212,312: first surface 120,220,320: Anchor structure 130,230,330,420,550: mesh 140,240,340: Textile electrode 150,250,350: Insulating film 242: First differential electrode pair 244: Second differential electrode pair 246:Reference electrode 260: Conductive parts 270: Fabric wiring 280: Wireless transmission module 290:Restraint belt 302,304: part 410:Yarn 510: Elastic yarn 520: Anti-slip yarn 530:Floating yarn 540: connecting yarn P1, P2: target features N1: Noise U1: Basic unit

In order to make the purpose, features, advantages and embodiments of the present invention more clearly understandable, the detailed description of the attached drawings is as follows: Figure 1 is a schematic diagram of an embodiment of the wearable myoelectric sensing device of the present invention. Figure 2 is a schematic diagram of an embodiment of the wearable myoelectric sensing device of the present invention when it is stretched. Figure 3A is a diagram of myoelectric signals measured during exercise using an embodiment of the wearable myoelectric sensing device of the present invention. Figure 3B shows the electromyographic signal measured during exercise using another wearable myoelectric sensing device. Figures 4A and 4B are respectively a front view and a wearing schematic diagram of another embodiment of the wearable myoelectric sensing device of the present invention. Figure 5 is a front view of another embodiment of the wearable myoelectric sensing device of the present invention. Figures 6A and 6B are respectively a tissue diagram and a schematic diagram of yarn loops of an embodiment of the fabric carrier in the wearable myoelectric sensing device of the present invention. Figures 7A and 7B are organizational diagrams of another embodiment of the fabric carrier in the wearable myoelectric sensing device of the present invention.

Domestic storage information (please note in order of storage institution, date and number) without Overseas storage information (please note in order of storage country, institution, date, and number) without

100: Wearable myoelectric sensing device

110: Fabric carrier

112: First surface

120: Anchor structure

130: Mesh

140: Fabric electrode

150:Insulating film

Claims (10)

A wearable myoelectric sensing device, including: A fabric carrier, comprising an anchoring structure disposed on a first surface of the fabric carrier and a mesh extending through the fabric carrier; a fabric electrode disposed on the first surface of the fabric carrier; and An insulating film is disposed on the first surface of the fabric carrier and encapsulates the periphery of the fabric electrode, wherein the area of the fabric carrier that is not covered with the insulating film has a first elastic stretch rate, covering all The area of the fabric carrier of the insulating film has a second elastic stretch rate, and the first elastic stretch rate is greater than the second elastic stretch rate. The wearable myoelectric sensing device according to claim 1, wherein the first elastic stretch rate is 130%~160%. The wearable myoelectric sensing device according to claim 1, wherein the second elastic stretch rate is 110%~120%. The wearable myoelectric sensing device according to claim 1, wherein the mesh is distributed between the anchoring structures. The wearable myoelectric sensing device according to claim 1, wherein the fabric carrier includes a first part and a second part, and the distribution density of the mesh in the first part is greater than that of the mesh in the second part. Distribution density in the section. The wearable myoelectric sensing device according to claim 1, wherein the anchoring structure is an anti-slip yarn woven into the fabric carrier. The wearable myoelectric sensing device as claimed in claim 1 further includes a strap connected to the fabric carrier. The wearable myoelectricity sensing device according to claim 1, further comprising a conductive member disposed on the fabric carrier and coupled to the fabric electrode. The wearable myoelectric sensing device of claim 8 further includes a wireless transmission module coupled to the conductive component. The wearable myoelectric sensing device according to claim 8, further comprising a fabric cable connecting the fabric electrode and the conductive member, wherein the insulating film covers the fabric cable.

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