Muscle stimulation feedback belt based on friction nanometer generator technology

Abstract

The invention discloses a muscle stimulation feedback belt based on a friction nano-generator technology, and the belt comprises a pump friction nano-generator which is attached to the outer side of a to-be-detected part, and generates electric energy through the driving friction of muscle vibration; the main friction nanometer generator generates electric energy through a friction power generation mode of a conductive layer and a dielectric layer, and is connected with a load through a part of the conductive layer to output the electric energy; and the pump friction nanometer generator is electrically connected with the main friction nanometer generator through the rectification circuit, so that charges generated by the pump friction nanometer generator are output to a conductive layer of the main friction nanometer generator, and when the charge density reaches the level that the dielectric layer is broken down, the pump friction nanometer generator enters a charging state again and the charge density is continuously improved. According to the feedback belt, the problems that the capacitor is broken down due to abnormal static impact, and the feedback belt fails and stops working are solved, and the stability and the reliability of the feedback belt are greatly improved; the output signal can be improved by 50 times, and the muscle contraction or relaxation degree can be fed back more quickly, sensitively and accurately.

Description

Technical Field

[0001] The present invention relates to the technical field of muscle electrical stimulation, and particularly relates to a muscle stimulation feedback belt based on triboelectric nanogenerator technology. Background Art

[0002] In recent years, with the improvement of people's living quality, the incidence of chronic diseases such as hypertension, hyperlipidemia, and diabetes has also shown a significant upward trend, and these are exactly the underlying diseases that induce stroke. Due to bad living habits, such as smoking, drinking, staying up late, lack of exercise, etc., stroke, a disease that was originally more common in the middle-aged and elderly, has become younger. Currently, stroke has become the first disabling disease and the third fatal disease in developed countries.

[0003] After a stroke occurs, limb dysfunction is one of the most important dysfunctions of stroke patients. Usually, stroke patients are also accompanied by problems in aspects such as speech, cognition, and swallowing. Among them, common manifestations of limb dysfunction are muscle weakness, muscle atrophy, muscle spasm, etc. For this reason, many scholars have proposed various methods for the treatment of stroke patients. And a neuromuscular electrical stimulation therapeutic apparatus emits an electric current with a specific frequency and intensity, directly stimulating the neuromuscular junction and triggering muscle contraction. For stroke patients, this electrical stimulation can simulate normal nerve impulses, activate muscle fibers that are in a "dormant" state due to nerve damage, and enable the muscles to perform passive contraction movements, enhancing muscle strength. Therefore, the neuromuscular electrical stimulation therapeutic apparatus has the effects of promoting muscle contraction of patients, improving muscle blood circulation, delaying the process of muscle atrophy, and regulating nerve excitability. Therefore, the neuromuscular electrical stimulation therapeutic apparatus has gradually become one of the extremely effective treatment methods in the rehabilitation process of stroke patients.

[0004] During the treatment process of receiving a neuromuscular electrical stimulation therapeutic apparatus, usually after attaching electrode patches to the muscle belly, by adjusting the electrical stimulation therapeutic apparatus, electric currents with different frequencies and magnitudes are output to meet the recovery of muscles damaged to different degrees. However, affected by factors such as different muscle conditions of different patients, differences in individual tolerance, and the obstacles and inaccuracies of patients' subjective expressions, it is extremely risky to solely rely on the input values of the neuromuscular electrical stimulation therapeutic apparatus to judge whether the current is appropriate at this time. For example, overuse or inappropriate electrical stimulation intensity and frequency are likely to cause muscle fatigue and affect the subsequent normal function of the muscles; in severe cases, it will also cause muscle damage, resulting in pain, swelling, muscle dysfunction, etc. Summary of the Invention

[0005] The present invention provides a muscle stimulation feedback belt based on triboelectric nanogenerator technology to solve the above problems.

[0006] To achieve the above object, the technical solution of the present invention is:

[0007] A muscle stimulation feedback band based on triboelectric nanogenerator technology, comprising:

[0008] A pump triboelectric nanogenerator, attached to the outside of the part to be measured, is driven by muscle vibration to relatively rub its conductive layer and dielectric layer, generating electrical energy under the action of triboelectrification and electrostatic induction;

[0009] A main triboelectric nanogenerator, attached to the outside of the part to be measured, generates electrical energy by rubbing the conductive layer and dielectric layer and electrostatic induction, and outputs electrical energy through connection of a part of the conductive layer to a load;

[0010] A rectifying circuit, the pump triboelectric nanogenerator is electrically connected to the main triboelectric nanogenerator through the rectifying circuit, so that the charges generated by the pump triboelectric nanogenerator are output to the conductive layer of the main triboelectric nanogenerator, charging a part of the conductive layer of the main triboelectric nanogenerator and increasing the charge density of the main triboelectric nanogenerator. When the dielectric layer of the main triboelectric nanogenerator is broken down, the charges on the conductive layer of the main triboelectric nanogenerator connected to the pump triboelectric nanogenerator are neutralized. Subsequently, the conductive layer of the main triboelectric nanogenerator can re-accumulate the charges output by the pump triboelectric nanogenerator, and the main triboelectric nanogenerator re-enters the charging state and continuously increases the charge density.

[0011] Further, the main triboelectric nanogenerator includes a first conductive layer, a second conductive layer, a third conductive layer, a first dielectric layer and a second dielectric layer;

[0012] The first dielectric layer is arranged on the side close to the part to be measured, the second dielectric layer is arranged at an interval on the side of the first dielectric layer far from the part to be measured, the second conductive layer and the third conductive layer are respectively arranged on both sides of the second dielectric layer, and the second conductive layer is arranged on the side close to the part to be measured. The first conductive layer is arranged on the side of the first dielectric layer far from the second conductive layer, and the first conductive layer is arranged inside the latex outer tube. The first conductive layer and the third conductive layer are connected to the load;

[0013] The first conductive layer and the second conductive layer are respectively connected to the two conductive layers of the pump triboelectric nanogenerator through a rectifying circuit.

[0014] Further, the pump triboelectric nanogenerator includes a fourth conductive layer, a fifth conductive layer, and a third dielectric layer. The fifth conductive layer is disposed on the inner side of the substrate attached to the part to be measured, the third dielectric layer is disposed on the side of the fifth conductive layer away from the muscle, and the fourth conductive layer is disposed inside the third dielectric layer. The fourth conductive layer and the fifth conductive layer are respectively connected to the first conductive layer and the second conductive layer of the main triboelectric nanogenerator through a rectifying circuit. The slight movement of the muscle drives the friction between the fifth conductive layer and the third dielectric layer, and under the action of triboelectrification and electrostatic induction, charge transfer occurs between the fourth conductive layer and the fifth conductive layer. The charge continuously inputs to the first conductive layer and the second conductive layer through the rectifying circuit, causing the electric charge quantity of the second conductive layer to continuously accumulate.

[0015] Further, the material of the first dielectric layer is Kapton material.

[0016] Further, the materials of the first conductive layer, the second conductive layer, the third conductive layer, and the fifth conductive layer are all conductive ink.

[0017] Further, the fourth conductive layer is conductive sand line.

[0018] Further, the materials of the second dielectric layer and the third dielectric layer are silicone rubber.

[0019] Further, the substrate is latex.

[0020] Further, it further includes a signal processing module, a data acquisition module, a data transmission module, and a host computer processing and display module;

[0021] The signal processing module is electrically connected to the first conductive layer and the third conductive layer of the main triboelectric nanogenerator, and is configured to receive, process, and amplify the electrical signal output by the main triboelectric nanogenerator, and input the amplified electrical signal to the data acquisition module;

[0022] The data acquisition module is configured to receive the amplified electrical signal, perform preliminary processing and analysis to obtain amplitude and frequency data, and then store the obtained electrical signal data and input it to the data transmission module;

[0023] The data transmission module is configured to receive the electrical signal data and transmit it to the host computer processing and display module;

[0024] The host computer processing and display module is configured to receive the electrical signal data, and further calculate and analyze the electrical signal data to obtain the degree of muscle contraction or relaxation and display it.

[0025] The beneficial effects of the present invention are:

[0026] A muscle stimulation feedback belt based on triboelectric nanogenerator technology disclosed in the present invention. The two conductive layers of the main triboelectric nanogenerator provided in this feedback belt are equivalent to capacitors that can be repeatedly charged in a cycle, eliminating the need for a separate capacitor. Moreover, compared with setting a capacitor separately between the pump triboelectric nanogenerator and the main triboelectric nanogenerator, there is no problem of the capacitor being broken down due to abnormal electrostatic shock, resulting in the failure and stoppage of the feedback belt. It can greatly improve the stability and reliability of the muscle stimulation feedback belt; this muscle stimulation feedback belt can increase the output signal by 50 times, and can more quickly, sensitively, and accurately feedback the degree of muscle contraction or relaxation. Therefore, it can be applied to the treatment process of a neuromuscular electrical stimulation therapeutic apparatus, and can accurately and quickly determine whether the magnitude and frequency of the current applied by the neuromuscular electrical stimulation therapeutic apparatus to the treatment site of the patient are appropriate, ensuring the treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 It is a schematic structural diagram of a muscle stimulation feedback belt based on triboelectric nanogenerator technology disclosed in an embodiment of the present invention;

[0029] Figure 2 It is a schematic cross-sectional view of the main triboelectric nanogenerator of a muscle stimulation feedback belt based on triboelectric nanogenerator technology disclosed in an embodiment of the present invention;

[0030] Figure 3 It is a schematic cross-sectional view of the pump triboelectric nanogenerator of a muscle stimulation feedback belt based on triboelectric nanogenerator technology disclosed in an embodiment of the present invention;

[0031] Figure 4 It is a schematic diagram of a muscle stimulation feedback belt based on triboelectric nanogenerator technology disclosed in an embodiment of the present invention when installed on the part to be measured during use;

[0032] Figure 5 It is a schematic diagram of the working state between the pump triboelectric nanogenerator and the main triboelectric nanogenerator;

[0033] Figure 6 It is a schematic diagram of the working cycle of the pump triboelectric nanogenerator charging the main triboelectric nanogenerator;

[0034] Figure 7 It is a schematic diagram of the working cycle after the main triboelectric nanogenerator is fully charged.

[0035] In the figure:

[0036] 1. Main triboelectric nanogenerator; 11. First conductive layer; 12. Second conductive layer; 13. Third conductive layer; 14. First dielectric layer; 15. Second dielectric layer; 16. Latex outer tube;

[0037] 2. Pump triboelectric nanogenerator; 21. Fourth conductive layer; 22. Fifth conductive layer; 23. Third dielectric layer; 24. Substrate;

[0038] 3. Rectifying circuit. Specific embodiments

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0040] As Figure 1 shown, a muscle stimulation feedback belt based on triboelectric nanogenerator technology provided in this embodiment includes:

[0041] The pump triboelectric nanogenerator 2 is attached to the outside of the part to be measured. When the muscle vibrates, it drives the relative friction between its conductive layer and dielectric layer, and generates electric energy under the action of triboelectrification and electrostatic induction;

[0042] The main triboelectric nanogenerator 1 is attached to the outside of the part to be measured. It generates electric energy through the friction between its conductive layer and dielectric layer and electrostatic induction, and outputs electric energy through the connection between part of the conductive layer and the load;

[0043] The rectifying circuit 3. The pump triboelectric nanogenerator 2 is electrically connected to the main triboelectric nanogenerator 1 through the rectifying circuit 3, so that the charge generated by the pump triboelectric nanogenerator 2 is output to the conductive layer of the main triboelectric nanogenerator 1, charging part of the conductive layer of the main triboelectric nanogenerator 1 and increasing the charge density of the main triboelectric nanogenerator 1. When the charge density of the main triboelectric nanogenerator 1 reaches a value that causes its dielectric layer to be broken down, or when a charge channel is formed between the conductive layer and the dielectric layer due to external environmental effects, resulting in the breakdown of the dielectric layer, the charge on the conductive layer of the main triboelectric nanogenerator 1 connected to the pump triboelectric nanogenerator 2 is neutralized. Subsequently, the conductive layer of the main triboelectric nanogenerator 1 can accumulate the charge output by the pump triboelectric nanogenerator 2 again, and the main triboelectric nanogenerator 1 re-enters the charging state and continuously increases the charge density.

[0044] The two conductive layers of the main triboelectric nanogenerator set in this feedback belt are equivalent to capacitors that can be repeatedly charged in a cycle, eliminating the need for a separate capacitor. Moreover, compared with setting a capacitor separately between the pump triboelectric nanogenerator and the main triboelectric nanogenerator, there is no problem of the feedback belt failing and stopping working after the capacitor is broken down, which can greatly improve the stability and reliability of the muscle stimulation feedback belt. This muscle stimulation feedback belt can increase the output signal by 50 times, can more quickly, sensitively, and accurately feedback the degree of muscle contraction or relaxation, and thus can be applied to the treatment process of a neuromuscular electrical stimulation therapeutic apparatus to accurately and quickly determine whether the magnitude and frequency of the current applied by the neuromuscular electrical stimulation therapeutic apparatus to the treatment site of the patient are appropriate, ensuring the treatment effect.

[0045] In a specific embodiment, as Figure 2 shown, the main triboelectric nanogenerator 1 includes a first conductive layer 11, a second conductive layer 12, a third conductive layer 13, a first dielectric layer 14, and a second dielectric layer 15;

[0046] The first dielectric layer 14 is arranged on the side close to the part to be measured, the second dielectric layer 15 is arranged at an interval on the side of the first dielectric layer 14 away from the part to be measured, the second conductive layer 12 and the third conductive layer 13 are respectively arranged on both sides of the second dielectric layer 15, and the third conductive layer 13 is arranged on the side close to the part to be measured. The first conductive layer 11 is arranged on the side of the first dielectric layer 14 away from the second conductive layer 12, and the first conductive layer 11 is arranged inside the latex outer tube 16. The first conductive layer 11 and the third conductive layer 13 are connected to the load;

[0047] The first conductive layer 11 and the second conductive layer 12 are respectively connected to the two conductive layers of the pump triboelectric nanogenerator 2 through a rectifying circuit 3;

[0048] The material of the first dielectric layer 14 is Kapton material. The typical breakdown field strength of Kapton material is approximately in the range of 100 - 300 MV / m. This enables this feedback belt to work under a higher electric field strength, resulting in a great increase in its charge density. A higher charge density means that the triboelectric nanogenerator can accumulate more charges, thereby increasing the output electrical energy and providing more sufficient energy for the operation of the muscle stimulation feedback belt. The materials of the first conductive layer 11, the second conductive layer 12, and the third conductive layer 13 are all conductive inks, and the second dielectric layer 15 is silicone rubber;

[0049] The manufacturing process of the main triboelectric nanogenerator is as follows:

[0050] (1) The rectifier circuit part includes four diodes (model: 1N5399 1.5A / 1000V). After welding the four diodes, place them in a latex tube (the length of the latex tube is 10 mm, the inner diameter is 6 mm, and the outer diameter is 8 mm), and seal the inside of the latex tube with epoxy resin to complete the preparation of the rectifier circuit;

[0051] (2) Preparation of silicone rubber, the process is as follows:

[0052] a. Add equal proportions of Dragon Skin A 10 Medium part and Dragon Skin B 10 Medium part; b. Uniformly mix the Dragon Skin A 10 Medium part and Dragon Skin B 10 Medium at 30 °C through a constant temperature magnetic stirrer to form liquid silicone rubber; c. To remove the bubbles in the liquid silicone rubber, use a vacuum dryer to evacuate for about 5 minutes to remove the bubbles in the mixed liquid silicone rubber; d. Inject the liquid silicone rubber into a glass mold (length: 10 cm, inner diameter: 3 mm) to make a silicone rubber substrate. In order to facilitate the subsequent demolding process of the silicone rubber substrate, the mold release agent needs to be injected into the mold before injecting the liquid silicone rubber; e. The process of curing the mold injected with liquid silicone rubber in a drying oven at 40 °C. After about 5 hours of constant temperature drying, remove it from the glass tube mold to obtain a silicone rubber substrate (length 10 cm, diameter 3 mm) as the base material;

[0053] (3) Prepare the conductive layer, dielectric layer and assemble them:

[0054] a. Spray the conductive ink on the silicone substrate through a spray gun (ink layer thickness: 100 μm) to form the conductive ink E3, which is the third conductive layer of the main-TENG; b. Clamp the silicone rod coated with the third conductive layer at one end of a PET tube (PET tube length: 10 cm, inner diameter: 4 mm), and completely cover the third conductive layer with liquid silicone rubber (the second dielectric layer). When the liquid silicone rubber is completely dry, peel off the PET mold; c. Spray another layer of conductive ink E2 with a thickness of 100 μm on the upper side of the third conductive layer on the silicone rod to obtain the second conductive layer and complete the production of the inner core; d. Apply the conductive ink E1 (the first conductive layer) with a thickness of 100 μm on the latex strip (latex strip length: 10 cm, thickness: 1 mm, width: 19 mm). After the conductive ink dries, paste a layer of Kapton with a thickness of 100 μm (the first dielectric layer) on its upper part, and then roll it up to obtain the latex outer tube (the same size as the latex tube of the rectifier circuit); e. Combine the inner core and the outer tube to obtain the main triboelectric nanogenerator part of the Muscle Stimulation Feedback Bands based on Triboelectric Nanogenerator Technology (MSB-TENG).

[0055] In a specific embodiment, as Figure 3 shown, the pump triboelectric nanogenerator 2 includes a fourth conductive layer 21, a fifth conductive layer 22, and a third dielectric layer 23. The fifth conductive layer 22 is disposed on the inner side of the substrate attached to the part to be measured, and the third dielectric layer 23 is disposed on the side of the fifth conductive layer 22 away from the muscle. The fourth conductive layer 21 is disposed inside the third dielectric layer 23. The fourth conductive layer 21 and the fifth conductive layer 22 are respectively connected to the first conductive layer 11 and the second conductive layer 12 of the main triboelectric nanogenerator 1 through a rectifier circuit 3. The slight movement of the muscle drives the friction between the fifth conductive layer 22 and the third dielectric layer 23, and under the action of triboelectrification and electrostatic induction, charge transfer occurs between the fourth conductive layer 21 and the fifth conductive layer 22. The charge continuously inputs to the first conductive layer 11 and the second conductive layer 12 through the rectifier circuit 3, so that the charge amount of the second conductive layer 12 continuously accumulates. The material of the fifth conductive layer 22 is conductive ink, the substrate 24 is latex, the fourth conductive layer 21 is conductive sand line. The conductive sand line usually has a certain flexibility, can better adapt to various bending, stretching and other movements during the use of the muscle stimulation feedback band, and will not affect its conductive and triboelectrification performance due to frequent deformation, enabling the feedback band to fit the human muscle more comfortably and naturally, and improving the use experience; the material of the third dielectric layer 23 is silicone rubber;

[0056] The manufacturing process of the pump triboelectric nanogenerator is as follows:

[0057] a. Wrap the flexible conductive yarn as the electrode of the pump-TENG, i.e., the fourth conductive layer, on the silicone substrate; b. Clamp the silicone substrate wrapped with the conductive yarn on one end of another PET tube (the PET tube is 10 cm long and the inner diameter is 4 mm), cover the wrapped conductive yarn e1 with liquid silicone rubber, and when the liquid silicone rubber is completely dry, peel off the PET mold to obtain the inner core; c. Apply conductive ink on the latex strip (length 10 cm, thickness 1 mm, width 19 mm), and after the conductive ink e2 is dried, the fifth conductive layer is formed, and the latex strip is rolled into a latex outer tube (consistent with the size of the latex tube of the rectifier circuit); d. Assemble the latex outer tube and the inner core together to obtain the pump-TENG part of the MSB-TENG.

[0058] Finally, the two input ends of the rectifier circuit are connected to the pump friction nanogenerator, the two output ends are connected to the main friction nanogenerator, and the first conductive layer and the third conductive layer are electrically connected to the signal processing module (the signal processing module has been connected to the other modules), thus completing the production and connection of the entire feedback belt. Figure 4 As shown, the feedback belt is attached and fixed to the muscles of the part to be tested, and two electrodes B1 and B2 of the neuromuscular electrical stimulation therapeutic device are installed on the muscles on both sides of the feedback belt. The neuromuscular electrical stimulation therapeutic device works to make the muscles produce micro-movements. The feedback stimulation belt accurately and sensitively converts the muscle micro-movements into electrical signals, and finally feeds back the contraction or relaxation of the muscles.

[0059] The working principle and process of the muscle stimulation feedback belt based on friction nanogenerator technology are as follows:

[0060] PUMP-TENG: Pump Triboelectric Nanogenerator

[0061] Main-TENG: Master Triboelectric Nanogenerator

[0062] like Figure 5 As shown in the figure, Ⅰ is the state where the pump-TENG fully charges the main-TENG first, and the main-TENG can be regarded as a large capacitor at this time; Ⅱ is the state where the pump-TENG stops supplying power to the main-TENG; Ⅲ is the state where the main-TENG continues to supply power to the load (i.e., outputs signals to the outside) when it is fully charged; Ⅳ is the state where the pump-TENG charges the main-TENG again when it is not fully charged;

[0063] like Figure 6 The four states (one cycle) of MSB-TENG supplying energy to the external load (collecting signals) are shown. Figure 6 Figure ⅰ is the initial state. In the system, the inner core and outer tube of the main-TENG and pump-TENG are at the farthest state, and no charge flows in the entire circuit.Figure 6 In state ii, the inner core approaches the outer tube and enters the contact state. Due to contact electrification and electrostatic induction, charge flow begins in the "conductive yarn e1" (the fourth conductive layer) and "conductive ink e2" (the fifth conductive layer) in the pump-TENG. Considering that the contact electrification effect in the main-TENG is very weak and has little impact on the device performance, the main-TENG only acts as a power-consuming device to absorb charges; Figure 6 In state iii, the inner core and the outer tube reach the maximum contact position, which is the midpoint state of the alternating current in the pump-TENG. At this time, the main-TENG continues to be charged; Figure 6 In state iv, the pump-TENG continues to charge the main-TENG. By repeating states i to iv multiple times, the alternating current charge output of the pump TENG is rectified into a direct current charge output by the rectifying circuit, thereby pumping positive and negative charges to the conductive ink E1 (the first conductive layer) and conductive ink E2 (the second conductive layer) respectively, enabling the main-TENG to reach a fully charged state;

[0064] The working cycle after the main-TENG is fully charged is as follows Figure 7 shown Figure 7 In i, a considerable amount of charge accumulates in the second conductive layer of the "conductive ink E2" in the main-TENG. Then, Figure 7 In ii to iv, when the outer tube and the inner core of the main-TENG undergo contact-separation motion, normally, since the second conductive layer of the "conductive ink E2" has no contact with the external circuit, the charges in the "conductive ink E2" are always bound and not consumed. However, due to triboelectrification and electrostatic induction, charge reciprocally transfers between the first conductive layer of the "conductive ink E1" and the third conductive layer of the "conductive ink E3".

[0065] Comparing with the charge density of a common TENG, which is limited by the electron gain and loss ability of the dielectric material used, the charge density of the MSB-TENG only depends on the charge storage capacity of the main-TENG (regarded as a capacitor). Therefore, the charge density of the MSB-TENG depends on when Kapton is broken down. So the charge density has been greatly improved compared with that of a common TENG. (The typical breakdown field strength of Kapton material is approximately in the range of 100 - 300 MV / m); When Kapton is broken down, the main-TENG can resume output through the recharging process, enabling the main triboelectric nanogenerator to resume normal operation without seriously affecting the performance and use of the entire muscle stimulation feedback belt, improving the reliability and service life of the device. Therefore, under the mechanical load of muscle contraction and relaxation, the muscle stimulation feedback belt based on triboelectric nanogenerator technology will output a periodic electrical pulse signal, and the magnitude and frequency of muscle contraction and relaxation will directly affect the amplitude and frequency of the electrical pulse signal. Therefore, the deformation degree applied to the patient's muscle can be reflected according to the electrical pulse signal output by the muscle stimulation feedback belt.

[0066] In a specific embodiment, it further includes a signal processing module, a data acquisition module, a data transmission module, and a host computer processing and display module;

[0067] The signal processing module is electrically connected to the first conductive layer and the third conductive layer of the main triboelectric nanogenerator, and is used to receive, process, and amplify the electrical signals output by the main triboelectric nanogenerator, and to input the amplified electrical signals into the data acquisition module; In this embodiment, the signal processing module includes an amplification circuit and a filtering circuit. Among them, the function of the amplification circuit: The pulsed electrical signals generated by the muscle stimulation feedback band are usually very weak, in the microvolt to millivolt level. However, the amplification circuit can improve the signal-to-noise ratio of the signal and ensure that the signal will not be overwhelmed by noise during transmission and processing. Therefore, it is necessary to amplify the signal to an amplitude suitable for subsequent processing through an amplifier; The filtering circuit can be used to filter out the noise and interference in the signal, making the signal purer;

[0068] The data acquisition module is used to receive the amplified electrical signals, perform preliminary processing and analysis to obtain amplitude and frequency data, and then store the obtained electrical signal data and input it into the data transmission module; The data acquisition module includes an analog-to-digital conversion circuit and a digital signal processor. Among them, the analog-to-digital conversion circuit converts the processed analog electrical signal into a digital signal so that the computer can process and store it; The digital signal processor can perform preliminary processing and analysis on the acquired digital signals, cache and package the amplitude and frequency parameters of the calculated signals, and prepare for subsequent transmission; In this embodiment, an NI acquisition card (model NI9215) and an electrometer (model Keithley6514) are used as the data acquisition module. After the muscle stimulation feedback band generates an electrical pulse signal under the stimulation of the periodic contraction and relaxation of the muscle, the analog-to-digital conversion of this electrical pulse analog signal is realized by the NI acquisition card, which can convert the continuously changing analog quantity into a digital quantity. The electrometer has the advantages of high current sensitivity, strong charge measurement ability, high resolution, and fast sampling speed, and is used to receive the digital signals output by the NI acquisition card;

[0069] The data transmission module is used to receive the electrical signal data and transmit it to the host computer processing and display module; In this embodiment, the data transmission module adopts a wired transmission method. Through the wired transmission method, the data in the processor is transmitted into the host computer software.

[0070] The upper computer processing and display module is used to receive the electrical signal data, and further calculate and analyze the electrical signal data to obtain the degree of muscle contraction or relaxation and display it. In this embodiment, the upper computer processing and display module includes: an upper computer software and a display interface. Among them, the upper computer software (Lab View program) is used to receive and parse the data from the data transmission module, and further analyze, process and store the data. By recording and analyzing the collected signals in real time through the Lab View program, the real-time electrical pulse signal diagram of the muscle stimulation feedback belt can be obtained. The display interface can use a liquid crystal display to display the processed data to the user in the form of a waveform diagram in real time. The above processes of signal processing, transmission, data calculation and analysis are all prior arts and will not be elaborated here.

[0071] Through comparative tests, compared with the feedback belt with only a pump triboelectric nanogenerator (traditional triboelectric nanogenerator), the output intensity of the electrical signal of this feedback belt has increased by about 50 times.

[0072] The present invention innovatively introduces triboelectric nanogenerator technology into the feedback research of neuromuscular electrical stimulators, enabling the neuromuscular electrical stimulators to form a closed loop during use, enabling medical staff to receive more stable feedback signals that are not easily affected by the environment, and the collected signals are more intuitive and simple, so as to better assist medical staff in judging whether the parameters set for the neuromuscular electrical stimulator are appropriate, and then adjusting the parameters set for the neuromuscular electrical stimulator.

[0073] In addition, the triboelectric materials (silicone rubber, latex) and electrodes (conductive sand yarn) used in this application are more adaptable to muscles of various shapes, so it is more convenient when detecting large-volume muscles, and the technology used in the whole production process is more environmentally friendly than the deposition technology, so it has more advantages in terms of environmental protection. In addition, in the present invention, conductive yarn is used as the electrode of the pump triboelectric nanogenerator, which has a lower price compared with the Ag / AgCl electrode.

[0074] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A muscle stimulation feedback band based on triboelectric nanogenerator technology, characterized in that, Comprising: A pump triboelectric nanogenerator (2), attached to the outer side of the part to be measured, generating electrical energy through the friction between its conductive layer and dielectric layer driven by muscle vibration; A main triboelectric nanogenerator (1), attached to the outer side of the part to be measured, generating electrical energy by the way of friction between its conductive layer and dielectric layer, and outputting electrical energy through the connection of a part of the conductive layer to the load; A rectifying circuit (3), the pump triboelectric nanogenerator (2) is electrically connected to the main triboelectric nanogenerator (1) through the rectifying circuit (3), so that the charge generated by the pump triboelectric nanogenerator (2) is output to the conductive layer of the main triboelectric nanogenerator (1), charging a part of the conductive layer of the main triboelectric nanogenerator (1) and increasing the charge density of the main triboelectric nanogenerator (1). When the dielectric layer of the main triboelectric nanogenerator (1) is broken down, the charge of the conductive layer of the main triboelectric nanogenerator (1) connected to the pump triboelectric nanogenerator (2) is neutralized. Subsequently, the conductive layer of the main triboelectric nanogenerator (1) can re-accumulate the charge output by the pump triboelectric nanogenerator (2), and the main triboelectric nanogenerator (1) re-enters the charging state and continuously increases the charge density.

2. The muscle stimulation feedback band based on triboelectric nanogenerator technology according to claim 1, wherein The main triboelectric nanogenerator (1) includes a first conductive layer (11), a second conductive layer (12), a third conductive layer (13), a first dielectric layer (14) and a second dielectric layer (15); The first dielectric layer (14) is arranged on the side close to the part to be measured, the second dielectric layer (15) is arranged at an interval on the side of the first dielectric layer (14) far from the part to be measured. The second conductive layer (12) and the third conductive layer (13) are respectively arranged on both sides of the second dielectric layer (15), and the second conductive layer (13) is arranged on the side close to the part to be measured. The first conductive layer (11) is arranged on the side of the first dielectric layer (14) far from the second conductive layer (12), and the first conductive layer (11) is arranged inside the latex outer tube (16). The first conductive layer (11) and the third conductive layer (13) are connected to the load; The first conductive layer (11) and the second conductive layer (12) are respectively connected to the two conductive layers of the pump triboelectric nanogenerator (2) through the rectifying circuit (3).

3. The muscle stimulation feedback belt based on triboelectric nanogenerator technology according to claim 2, characterized in that, The described pump triboelectric nanogenerator (2) includes a fourth conductive layer (21), a fifth conductive layer (22), and a third dielectric layer (23). The fifth conductive layer (22) is disposed on the inner side of a substrate (24) attached to the part to be measured. The third dielectric layer (23) is disposed on the side of the fifth conductive layer (22) away from the muscle. The fourth conductive layer (21) is disposed inside the third dielectric layer (23). The fourth conductive layer (21) and the fifth conductive layer (22) are respectively connected to the first conductive layer (11) and the second conductive layer (12) of the main triboelectric nanogenerator (1) through a rectifying circuit (3). The slight movement of the muscle drives the friction between the fifth conductive layer (22) and the third dielectric layer (23), and under the action of triboelectrification and electrostatic induction, charge transfer occurs between the fourth conductive layer (21) and the fifth conductive layer (22). The charge continuously inputs to the first conductive layer (11) and the second conductive layer (12) through the rectifying circuit (3), causing the charge quantity of the second conductive layer (12) to continuously accumulate.

4. The muscle stimulation feedback belt based on triboelectric nanogenerator technology according to claim 2, wherein The material of the first dielectric layer (14) is Kapton material.

5. The muscle stimulation feedback belt based on triboelectric nanogenerator technology according to claim 3, characterized in that The materials of the first conductive layer (11), the second conductive layer (12), the third conductive layer (13), and the fifth conductive layer (22) are all conductive ink.

6. The muscle stimulation feedback band based on triboelectric nanogenerator technology according to claim 3, characterized in that, The fourth conductive layer (21) is a conductive sand line.

7. The muscle stimulation feedback belt based on triboelectric nanogenerator technology according to claim 3, wherein The materials of the second dielectric layer (15) and the third dielectric layer (23) are silicone rubber.

8. The muscle stimulation feedback belt based on triboelectric nanogenerator technology according to claim 3, characterized in that The substrate (24) is latex.

9. The muscle stimulation feedback belt based on triboelectric nanogenerator technology according to claim 1, characterized in that, It further includes a signal processing module, a data acquisition module, a data transmission module, and a host computer processing and display module; The signal processing module is electrically connected to the first conductive layer and the third conductive layer of the main triboelectric nanogenerator, and is used for receiving, processing, and amplifying the electrical signals output by the main triboelectric nanogenerator, and for inputting the amplified electrical signals to the data acquisition module; The data acquisition module is used for receiving the amplified electrical signals and performing preliminary processing and analysis to obtain amplitude and frequency data, and then storing the obtained electrical signal data and inputting it to the data transmission module; The data transmission module is used for receiving the electrical signal data and transmitting it to the host computer processing and display module; The host computer processing and display module is used for receiving the electrical signal data, and further calculating and analyzing the electrical signal data to obtain the degree of muscle contraction or relaxation and displaying it.

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