Wearable arm movement self-driven wireless sensor

Abstract

The invention discloses a wearable arm movement self-driven wireless sensor which comprises a sensor frame (1), an electrode layer I (2), an electrode layer II (3), a positive friction layer I (4), a positive friction layer II (5), a sliding block, a carbon fiber wire (8), a drawing rope (6) and a spring (7). The energy collected by the triboelectric sensor can meet the requirement of real-time wireless signal transmission.

Description

Technical Field

[0001] The present invention relates to the field of sensors, in particular to a wearable arm motion self-driven wireless sensor. Background Art

[0002] Currently, existing wearable wireless arm motion sensors primarily rely on inertial measurement units (IMUs) and wireless signal transmission modules. Both signal generation and wireless transmission rely on chemical batteries for power. The high energy consumption of wireless signal transmission can affect the sensor's continued usability. The use of a large number of batteries also poses environmental concerns. Sensor design also requires dedicated space for placement, which impacts sensor integration and structural optimization. Self-driven triboelectric sensing technology based on mechanical motion can directly convert the mechanical energy of arm motion into an electrical signal carrying this information, thus enabling self-powered sensor signal generation without the need for an additional power supply circuit. This reduces system complexity and, when combined with research findings in the materials field, facilitates the realization of wearable arm motion sensing. However, based on current technology, the energy harvested by triboelectric sensors still cannot meet the requirements for instant wireless signal transmission. Summary of the Invention

[0003] The purpose of the present invention is to provide a wearable arm motion self-driven wireless sensor, which includes a sensor frame, an electrode layer I, an electrode layer II, a positive friction layer I, a positive friction layer II, a slider, a carbon fiber wire, a drawstring, and a spring.

[0004] The upper top surface and lower bottom surface of the sensor frame serve as stator I and stator II respectively.

[0005] An electrode layer 1 is attached to the lower surface of the stator 1.

[0006] A positive friction layer I is attached to the lower surface of the electrode layer I.

[0007] An electrode layer II is attached to the upper surface of the stator II.

[0008] A positive friction layer II is attached to the upper surface of the electrode layer II.

[0009] One end of the spring is fixed on the side wall of the sensor frame, and the other end is connected to the slider.

[0010] One end of the drawstring is fixed on the user's forearm, and the other end is connected to the slider.

[0011] The carbon fiber wire is fixed to one side of the sensor frame;

[0012] When the forearm extends, the drawstring pulls the slider to slide, and the spring is stretched at the same time. When the forearm bends, the spring pulls the slider back.

[0013] As the slider slides back and forth, the steel sheet on the slider contacts the carbon fiber wire, thereby conducting the circuit.

[0014] Furthermore, the sensor frame is a frame composed of acrylic plates.

[0015] Furthermore, the material of the electrode layer I and the electrode layer II is aluminum.

[0016] Furthermore, the material of the positive friction layer I and the positive friction layer II is nylon.

[0017] Furthermore, screws are included; the screws are used to fix the upper top surface and the lower bottom surface of the sensor frame.

[0018] Furthermore, the slider includes a slider body, foam, a slider negative friction layer I, a slider negative friction layer II, a charge storage area, and a steel sheet.

[0019] One end of the slider body is connected to the spring, and the other end is connected to the drawstring.

[0020] The steel sheet is placed on a side of the slider close to the spring.

[0021] The upper surface and the lower bottom surface of the slider body are both adhered with foam.

[0022] The foam surface that does not contact the slider body is sequentially provided with a slider negative friction layer I, a charge storage area, and a slider negative friction layer II.

[0023] Furthermore, the material of the slider negative friction layer I and the slider negative friction layer II is polytetrafluoroethylene.

[0024] Furthermore, the material of the charge storage region is polycarbonate.

[0025] Furthermore, the bottom of the sensor frame begins to have multiple square holes for the magic tape to pass through.

[0026] The sensor frame is fixed to the user's upper arm by a magic tape passing through a square hole.

[0027] Furthermore, the carbon fiber wire includes a plurality of flexible carbon fiber filaments.

[0028] Furthermore, the micro switch converts the smooth output of the wireless sensor into an instantaneous output.

[0029] The technical effect of the present invention is unquestionable, and the energy collected by the triboelectric sensor of the present invention can meet the needs of instant wireless transmission of signals.

[0030] Compared with the traditional sliding TENG and the ternary dielectric structure TENG (TEL-TENG), the energy output of the DTE-S-TENG provided by the present invention is increased by 4.5 times and 2.4 times, respectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of the WSAMS structure;

[0032] Figure 2 The actual picture of WSAMS after assembly (A) and before assembly (B);

[0033] Figure 3 Schematic diagram of wearing WSAMS;

[0034] Figure 4 This is the principle diagram of wireless signal transmission;

[0035] Figure 5 Assembled (A) and unassembled (B) images of the DTE-S-TENG.

[0036] Figure 6 The working principle of DTE-S-TENG;

[0037] Figure 7 DTE-S-TENG charge distribution (top) and comsol simulation results (bottom);

[0038] Figure 8 (A), (B), and (C) are schematic diagrams of the switch structure before, during, and after closing.

[0039] Figure 9 (A), (B), and (C) show the arrangement of the four switches, a magnified view of the fourth switch, and a scanning electron microscope image of the carbon fiber conductor.

[0040] Figure 10 Comparison of the output energy of three types of TENG;

[0041] Figure 11 Output of the WSAMS after reciprocating the slider for different circuit connections; (A) without mechanical switch, (B) comparison of output without and with mechanical switch, (C) with mechanical switch;

[0042] Figure 12 Output the corresponding wireless signal for 6 pulses;

[0043] Figure 13 Characterization of wireless signal transmission system performance; (A) Linear motor drive platform (B) Received signal amplitude and receiving end series capacitor C R relationship; C RSignal collected when the capacitance is 33pF (C) and its corresponding spectrum (D); voltage amplitude (E) and corresponding oscillation frequency (F) at different sliding speeds; signal at a sliding speed of 0.01m / s (G) and its corresponding spectrum (H); (I) Schematic diagram of the transmitting and receiving coils; (J) Relationship between the received signal amplitude and the transmission distance; (K) Signal received when the transmission distance is 0.1m; (L) Signal received when the transmission distance is 2.2m.

[0044] Figure 14 Figure 1 is the structure diagram of SWCRS; (A) SWCRS workflow diagram; (B) The experimenter wears WSAMS; (C) SWCRS hardware components;

[0045] Figure 15 Demonstration of SWCRS; (AD) arm controls the robotic arm to rotate clockwise; (EH) arm controls the robotic arm to rotate counterclockwise;

[0046] In the figure: sensor frame 1, electrode layer I2, electrode layer II3, positive friction layer I4, positive friction layer II5, carbon fiber wire 8, drawstring 6, spring 7, foam 10, slider negative friction layer I11, slider negative friction layer II13, charge storage area 12, steel sheet 9, screw 14. DETAILED DESCRIPTION

[0047] The present invention will be further described below with reference to the following examples, but it should not be understood that the scope of the present invention is limited to the following examples. Without departing from the above technical ideas of the present invention, various substitutions and modifications can be made according to common technical knowledge and customary means in the art, and all should be included in the scope of protection of the present invention.

[0048] Example 1:

[0049] A wearable arm motion self-driven wireless sensor includes a sensor frame 1, an electrode layer I2, an electrode layer II3, a positive friction layer I4, a positive friction layer II5, a slider, a carbon fiber wire 8, a drawstring 6, and a spring 7.

[0050] The upper top surface and the lower bottom surface of the sensor frame 1 serve as stator I and stator II respectively.

[0051] An electrode layer I2 is attached to the lower surface of the stator I.

[0052] A positive friction layer I4 is attached to the lower surface of the electrode layer I2.

[0053] An electrode layer II3 is attached to the upper surface of the stator II.

[0054] A positive friction layer II5 is attached to the upper surface of the electrode layer II3.

[0055] One end of the spring 7 is fixed to the side wall of the sensor frame 1 , and the other end is connected to the slider.

[0056] One end of the drawstring 6 is fixed on the user's forearm, and the other end is connected to the slider.

[0057] The carbon fiber wire 8 is fixed on one side of the sensor frame 1;

[0058] When the forearm is extended, the drawstring 6 pulls the slider to slide, and the spring 7 is stretched. When the forearm is bent, the spring 7 pulls the slider to slide back.

[0059] During the reciprocating sliding of the slider, the steel sheet 9 on the slider contacts the carbon fiber wire 8, thereby conducting the circuit.

[0060] The sensor frame 1 is a frame made of acrylic plates.

[0061] The material of the electrode layer I2 and the electrode layer II3 is aluminum.

[0062] The material of the positive friction layer I4 and the positive friction layer II5 is nylon.

[0063] The wireless sensor further includes screws 14 ; the screws are used to fix the upper top surface and the lower bottom surface of the sensor frame 1 .

[0064] The slider includes a slider body, foam 10, a slider negative friction layer I11, a slider negative friction layer II13, a charge storage area 12, and a steel sheet 9.

[0065] One end of the slider body is connected to the spring 7 , and the other end is connected to the drawstring 6 .

[0066] The steel sheet 9 is placed on the side of the slider close to the spring.

[0067] Foam 10 is attached to the upper surface and the lower bottom surface of the slider body.

[0068] The surface of the foam that is not in contact with the slider body is sequentially provided with a slider negative friction layer I11, a charge storage area 12, and a slider negative friction layer II13.

[0069] The material of the slider negative friction layer I11 and the slider negative friction layer II13 is polytetrafluoroethylene.

[0070] The material of the charge storage region 12 is polycarbonate.

[0071] The bottom of the sensor frame 1 has a plurality of square holes for the magic tape to pass through.

[0072] The sensor frame 1 is fixed to the user's upper arm by a magic tape passing through a square hole.

[0073] The carbon fiber conductor 8 includes a plurality of flexible carbon fiber filaments.

[0074] The micro switch converts the smooth output of the wireless sensor into an instantaneous output.

[0075] Example 2:

[0076] A wearable arm motion self-driven wireless sensor includes a sensor frame 1, an electrode layer I2, an electrode layer II3, a positive friction layer I4, a positive friction layer II5, a slider, a carbon fiber wire 8, a drawstring 6, and a spring 7.

[0077] The upper top surface and the lower bottom surface of the sensor frame 1 serve as stator I and stator II respectively.

[0078] An electrode layer I2 is attached to the lower surface of the stator I.

[0079] A positive friction layer I4 is attached to the lower surface of the electrode layer I2.

[0080] An electrode layer II3 is attached to the upper surface of the stator II.

[0081] A positive friction layer II5 is attached to the upper surface of the electrode layer II3.

[0082] One end of the spring 7 is fixed to the side wall of the sensor frame 1 , and the other end is connected to the slider.

[0083] One end of the drawstring 6 is fixed on the user's forearm, and the other end is connected to the slider.

[0084] The carbon fiber wire 8 is fixed on one side of the sensor frame 1;

[0085] When the forearm is extended, the drawstring 6 pulls the slider to slide, and the spring 7 is stretched. When the forearm is bent, the spring 7 pulls the slider to slide back.

[0086] During the reciprocating sliding of the slider, the steel sheet 9 on the slider contacts the carbon fiber wire 8, thereby conducting the circuit.

[0087] Example 3:

[0088] A wearable arm motion self-driven wireless sensor, the technical content of which is the same as that of Example 2, further, the sensor frame 1 is a frame composed of acrylic plates.

[0089] Example 4:

[0090] A wearable arm motion self-driven wireless sensor, the technical content of which is the same as any one of Examples 2-3, further, the material of the electrode layer I2 and the electrode layer II3 is aluminum.

[0091] Example 5:

[0092] A wearable arm motion self-driven wireless sensor, the technical content of which is the same as any one of Examples 2-4, further, the material of the positive friction layer I4 and the positive friction layer II5 is nylon.

[0093] Example 6:

[0094] A wearable arm movement self-driven wireless sensor, the technical content of which is the same as any one of Examples 2-5. Furthermore, the slider includes a slider body, foam 10, a slider negative friction layer I11, a slider negative friction layer II13, a charge storage area 12, and a steel sheet 9.

[0095] One end of the slider body is connected to the spring 7 , and the other end is connected to the drawstring 6 .

[0096] The steel sheet 9 is placed on the side of the slider close to the spring.

[0097] Foam 10 is attached to the upper surface and the lower bottom surface of the slider body.

[0098] The surface of the foam that is not in contact with the slider body is sequentially provided with a slider negative friction layer I11, a charge storage area 12, and a slider negative friction layer II13.

[0099] Example 7:

[0100] A wearable arm motion self-driven wireless sensor, the technical content of which is the same as any one of Examples 2-6, further, the material of the slider negative friction layer I11 and the slider negative friction layer II13 is polytetrafluoroethylene.

[0101] Example 8:

[0102] A wearable arm motion self-driven wireless sensor, the technical content of which is the same as any one of Examples 2-7, further, the material of the charge storage area 12 is polycarbonate.

[0103] Example 9:

[0104] A wearable arm motion self-driven wireless sensor, the technical content of which is the same as any one of Examples 2-8, furthermore, a plurality of square holes for magic tape to pass through are provided at the bottom of the sensor frame 1.

[0105] The sensor frame 1 is fixed to the user's upper arm by a magic tape passing through a square hole.

[0106] Example 10:

[0107] A wearable arm motion self-driven wireless sensor, the technical content of which is the same as any one of Examples 2-9, further, the carbon fiber wire 8 includes a plurality of flexible carbon fiber filaments.

[0108] Example 11:

[0109] A wearable arm motion self-driven wireless sensor, the technical content of which is the same as any one of Examples 2-10, further, the microswitch converts the smooth output of the wireless sensor into instantaneous output.

[0110] Example 12:

[0111] A wearable arm motion self-driven wireless sensor, the technical content of which is the same as any one of Examples 2-11, further, the wireless sensor also includes screws 14; the screws are used to fix the upper top surface and the lower bottom surface of the sensor frame 1.

[0112] Example 13:

[0113] A wearable arm motion self-driven wireless sensor, the contents are as follows:

[0114] Figure 1 Schematic diagram of the wearable arm motion self-actuated wireless sensor (WSAMS). Figure 2 This is a physical image of the WSAMS. The WSAMS primarily consists of two stators at the top and bottom, a slider in the middle, a rope on the left, and a spring on the right. The entire sensor's outer frame is made of acrylic sheeting. The stators at the top and bottom have the same structure, with aluminum electrodes attached to the acrylic substrate, and nylon (PA) attached to the electrode surface as a positive friction layer. The friction layer of the slider in the middle is symmetrically distributed vertically. Foam is attached to the acrylic substrate in the middle to optimize the contact state of the friction layer. Polytetrafluoroethylene (PTFE) is attached to the foam as the slider's negative friction layer, and polycarbonate (PC) is attached to the foam as a charge storage area. One end of the spring is fixed to the slider, and the other end is fixed to the frame. The rope is tied to the other end of the slider. Figure 3 A schematic diagram of the WSAMS is shown. The WSAMS is secured to the upper arm via two Velcro straps threaded through two square holes at its base. The other ends of the straps are fixed to the forearm. When the forearm is extended, the straps pull the slider, simultaneously stretching the spring. When the forearm is bent, the spring pulls the slider back. As the slider moves back and forth, the steel sheet contacts the flexible carbon fiber conductor, completing the circuit.

[0115] Figure 4 It is a wireless sensing principle based on the triboelectric nanogenerator (TENG). The transmitting end is composed of a TENG and a transmitting coil in series, and the receiving end is composed of a commercial ceramic capacitor and a receiving coil in series. The two coils are coaxial. TENG can be equivalent to a capacitor (C TENG ), and the transmitting coil (L T ) are connected in series to form an LC circuit, and due to the inevitable resistance (R T), when TENG releases energy, it will form high-frequency damped oscillation. During high-frequency oscillation, a changing magnetic field will be generated at the center of the transmitting coil, and a magnetic field will also change at the center of the coaxial receiving coil, thereby generating an induced current in the receiving coil. R ) and resistance (R R ) also causes LC damped oscillation in the receiving circuit. The oscillation frequency at both ends can be calculated using formula (1). When the oscillation frequencies at both ends are consistent, a strong magnetic resonance coupling effect is formed, achieving the highest energy transmission efficiency. This allows wireless signal transmission.

[0116]

[0117] In order to be wearable, the TENG cannot be made too large. However, if the TENG is too small, the output energy cannot trigger LC oscillation. Therefore, we designed a double-layer ternary dielectric sliding TENG (DTE-S-TENG) with ultra-high charge density. Figure 5 Figures AB are the assembled and unassembled DTE-S-TENG, respectively. The DTE-S-TENG consists of two stators and a slider. Figure 6 The working principle of the DTE-S-TENG is demonstrated. Aluminum (Al) serves as the electrodes, nylon (PA) as the stator's positive friction layer carries a positive charge, polytetrafluoroethylene (PTFE) as the slider's negative friction layer carries a negative charge, and polycarbonate (PC) as the charge storage area carries a positive charge. When the slider slides left and right, electrostatic induction causes charge to transfer between the electrodes, generating a current in the external circuit. Figure 7 COMSOL simulates the potential change. The potential distribution matches the charge distribution. As the slider slides, the potential difference between the friction layer and the electrode also changes.

[0118] Based on the excellent output performance of DTE-S-TENG, WSAMS was further designed based on its structure to achieve the functions of wearability and arm movement sensing. However, the output energy of WSAMS still cannot trigger LC oscillation and realize wireless signal transmission. Therefore, we convert the smooth output of WSAMS into instantaneous output through a flexible mechanical switch. Figure 8 As shown, the sensor has a total of 4 micro switches (i.e., carbon fiber wires 8). When the slider slides back and forth, the circuit will be turned on only when the steel sheet on the slider touches the carbon fiber wires on the frame, generating a pulse output under the action of high voltage. Figure 9 The layout of the four switches is shown. Carbon fiber conductors are composed of many flexible carbon fiber filaments ( Figure 9 C). The steel sheet will not deform significantly when in contact with it, preventing rapid metal fatigue that would reduce the durability of the switch.

[0119] like Figure 10As shown, when the slider area is equal (20×33mm 2 ), compared with the traditional sliding TENG and the ternary dielectric structure TENG (TEL-TENG), the energy output of DTS-S-TENG is increased by 4.5 times and 2.4 times, respectively.

[0120] Figure 11 Figure A shows the charge output of a WSAMS when the slider slides back and forth without a mechanical switch. Since the slider slides at a constant speed, six smooth outputs are generated. Figure 11 C shows that when WSAMS has a mechanical switch, the slider slides back and forth and the charge output becomes 6 pulse outputs (II, IV, VI, VIII, X, XII). Figure 11 Figure B shows a comparison of the output at the same stage with and without a mechanical switch. Without the mechanical switch, the charge transfer curve rises steadily. With the mechanical switch, charge transfer is completed rapidly within 81ms of the switch closing. The small amount of charge transfer that occurs during the first second is due to the DTE-S-TENG's high voltage, which attracts ions from the air at the switch port. This successfully achieves self-driven wireless signal generation and transmission over a distance of 20cm. Figure 12 It shows the six wireless signals measured by the oscilloscope in the receiving circuit, corresponding to six pulse outputs.

[0121] Figure 13 A shows the performance characterization platform of wireless signal transmission system based on WSAMS, and conducts quantitative tests under the stable drive of linear motor. When the energy transmission efficiency is the highest, the information transmission is the most stable and the transmission distance is the longest. R As the value of α increases, the signal collected by the receiving end increases first and then decreases ( Figure 13 B), this is because the capacitor affects the oscillation frequency. The closer the oscillation frequency between the transmitter and the receiver, the higher the energy transfer efficiency. R When the voltage signal is 33pF, the maximum value is ( Figure 13 C), its oscillation frequency is 7.2503MHz( Figure 13 D) V PP It is the difference between the highest and lowest points of the voltage oscillation signal. As the sliding speed of the slider increases from 0.01m / s to 0.06m / s, the received signal voltage tends to increase slowly ( Figure 13 E), this is because the faster the sliding speed, the less energy is consumed by the switch port to adsorb ions in the air. However, its oscillation frequency hardly changes ( Figure 13 F), which shows that WSAMS can adapt to the complex movement of human arms. Figure 13GH shows the received signal and its spectrum when the sliding speed is 0.01m / s. The signal transmission distance is defined as the distance between the two coils ( Figure 13 I). When the transmission distance increases from 0.1m to 0.25m, V PP Rapidly reduce from 54V to 5V ( Figure 13 J). This is because the rate of change of the magnetic flux in the receiving coil decreases sharply when the coil moves at a short distance. When the transmission distance increases from 0.25m to 2.2m, V PP Gradually stabilized. This is because when the coil moves over a long distance, the rate of change of the magnetic flux in the receiving coil does not change significantly. And at 2.2m, a clear 2.1V oscillation signal can still be detected ( Figure 13 L). And the signal waveforms received at 2.2m and 0.1m are consistent ( Figure 13 K), which shows that the system is very stable in near-field transmission and can fully meet the needs of industrial near-field wireless control.

[0122] In order to verify the feasibility and stability of WSAMS application, a Figure 14 The self-driving robot arm wireless control system (SWCRS) is shown in the figure. The SWCRS workflow is as follows Figure 14 As shown in Figure A, when the arm moves, it drives the WSAMS, and the oscilloscope detects the oscillation signal that carries the arm's movement information. The detected signal can be transmitted to the computer in real time, and the computer controls the movement of the robotic arm based on the received signal. Figure 14 B shows a photo of the experimenter wearing WSAMS. The entire system consists of WSAMS, two coils, a control computer and a robotic arm ( Figure 14 C). In addition, a real-time demonstration of the system was conducted. Figure 15 AD shows the human hand wirelessly controlling the robotic arm to rotate clockwise, Figure 15 EH demonstrated wireless control of a robotic arm's counterclockwise rotation using a human hand. The entire control process was continuous and smooth. This fully demonstrated the WSAMS's ability as a wearable sensor to detect and wirelessly transmit human arm movement, all without the need for an external power source. The sensor can also be used to detect other joint motions.

Claims

1. A wearable arm motion self-driven wireless sensor, characterized by: It includes a sensor frame (1), an electrode layer I (2), an electrode layer II (3), a positive friction layer I (4), a positive friction layer II (5), a slider, a carbon fiber wire (8), a drawstring (6), and a spring (7); The upper top surface and the lower bottom surface of the sensor frame (1) serve as stator I and stator II respectively; An electrode layer 1 (2) is attached to the lower surface of the stator 1; A positive friction layer I (4) is attached to the lower surface of the electrode layer I (2); An electrode layer II (3) is attached to the upper surface of the stator II; A positive friction layer II (5) is attached to the upper surface of the electrode layer II (3); One end of the spring (7) is fixed to the side wall of the sensor frame (1), and the other end is connected to the slider; One end of the drawstring (6) is fixed to the user's forearm, and the other end is connected to the slider; The carbon fiber wire (8) is fixed on one side of the sensor frame (1); When the forearm is extended, the drawstring (6) pulls the slider to slide, and the spring (7) is stretched at the same time; when the forearm is bent, the spring (7) pulls the slider to slide back; During the reciprocating sliding of the slider, the steel sheet (9) on the slider contacts the carbon fiber wire (8), thereby conducting the circuit.

2. The wearable arm motion self-driven wireless sensor according to claim 1, characterized in that: The sensor frame (1) is a frame body composed of acrylic plates.

3. The wearable arm motion self-driven wireless sensor according to claim 1, characterized in that: The material of the electrode layer I (2) and the electrode layer II (3) is aluminum. The material of the positive friction layer I (4) and the positive friction layer II (5) is nylon.

4. The wearable arm motion self-driven wireless sensor according to claim 1, characterized in that: The invention also includes screws (14); the screws are used to fix the upper top surface and the lower bottom surface of the sensor frame (1).

5. The wearable arm motion self-driven wireless sensor according to claim 1, characterized in that: The slider comprises a slider body, foam (10), a slider negative friction layer I (11), a slider negative friction layer II (13), a charge storage area (12), and a steel sheet (9); One end of the slider body is connected to the spring (7), and the other end is connected to the drawstring (6); The steel sheet (9) is placed on a side of the slider close to the spring (7); The upper surface and the lower bottom surface of the slider body are both attached with foam (10); The foam surface not in contact with the slider body is sequentially provided with a slider negative friction layer I (11), a charge storage area (12), and a slider negative friction layer II (13).

6. The wearable arm motion self-driven wireless sensor according to claim 5, characterized in that: The material of the slider negative friction layer I (11) and the slider negative friction layer II (13) is polytetrafluoroethylene.

7. The wearable arm motion self-driven wireless sensor according to claim 5, characterized in that: The material of the charge storage area (12) is polycarbonate.

8. The wearable arm motion self-driven wireless sensor according to claim 1, characterized in that: The bottom of the sensor frame (1) is provided with a plurality of square holes for the magic tape to pass through; The sensor frame (1) is fixed to the user's upper arm by a magic tape passing through a square hole.

9. The wearable arm motion self-driven wireless sensor according to claim 1, characterized in that: The carbon fiber conductor (8) comprises a plurality of flexible carbon fiber filaments.

10. The wearable arm motion self-driven wireless sensor according to claim 1, characterized in that: The micro switch converts the smooth output of the wireless sensor into an instantaneous output.

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