Textile electronic system integrating detection and treatment of muscle fatigue

Abstract

The process design allows for a high degree of integration of components onto a single fabric, while also enabling the collection of electromyographic signals and transcutaneous electrical stimulation. [Solution] A textile electronic system is disclosed that integrates conductive textile lines, physiological electrodes, vertical interconnect vias, and chip components on the same textile substrate, wherein conductive textile lines interconnected via vertical interconnect vias are provided on either side of the surface of the textile substrate, and the integrally formed circuit includes an electrode array and a signal conditioning circuit, the electrode array is used for detecting electromyographic signals and applying transcutaneous electrical stimulation, and the signal conditioning circuit is used for amplifying electromyographic signals, adjusting the electrical stimulation waveform and controlling the overall timing logic, and also has the functions of safe isolation and electrical stimulation waveform detection, for the detection and treatment of muscle fatigue.

Claims

1. A textile electronic system that integrates the detection and treatment of muscle fatigue, Conductive fabric lines, physiological electrodes, vertical interconnect vias, and tip components are integrated on the same fabric substrate, and conductive fabric lines interconnected via vertical interconnect vias are provided on either side surface of the fabric substrate, and the conductive fabric lines, physiological electrodes, vertical interconnect vias, and tip components are formed integrally on the fabric substrate, and the circuit, in which a two-layer circuit structure is formed on a single layer of fabric, includes an electrode array and a signal conditioning circuit, the electrode array is used for detecting electromyographic signals and applying transcutaneous electrical stimulation and includes physiological electrodes, and the signal conditioning circuit is used for amplifying electromyographic signals, adjusting the electrical stimulation waveform and controlling the overall timing logic, and has the functions of safe isolation and electrical stimulation waveform detection. The aforementioned vertical interconnecting vias are characterized by the following: conductive paste is brush-applied to both sides of the required area using a gas pressure injection method, and air is blown into each side with an air gun to penetrate the conductive paste into the texture structure of the woven fabric substrate in that area, thereby creating communication between the front and back surfaces of the corresponding areas of the woven fabric substrate; the conductive paste used is an intermetallic compound LM / Cu NP paste formed by mixing liquid metal and copper nanoparticles in a centrifugal mixer or a high-speed degasser; and the woven fabric electronic system integrates the detection and treatment of muscle fatigue.

2. The textile electronic system for detecting and treating muscle fatigue according to claim 1, characterized in that an electrode array is constructed by multiplexing a pair of electrodes, the electrode array includes the first to fourth electrodes, the first and second electrodes are the positive and negative input terminals of the electromyographic signal, the third electrode is the positive output terminal of the electrical stimulation, and the fourth electrode functions as both the negative output terminal of the electrical stimulation and the output terminal of the right bundle branch drive circuit, and the electrodes for signal sampling and electrodes for electrical stimulation application are separated so that signal sampling is not affected by electrode polarization.

3. The signal adjustment circuit uses three independent photocoupler isolators and an H-bridge circuit composed of four photocoupler isolators, the first, second, and fourth electrodes are each connected to the peripheral circuit via one independent photocoupler isolator, and the third and fourth electrodes are connected to the peripheral circuit via the H-bridge circuit, and by controlling the photocoupler isolators, the four electrodes are selectively connected to the circuit, thereby effectively enabling independent switching between electromyography detection and electrical stimulation application, thereby avoiding signal interference and ensuring the safety of the system, as described in paragraph 2 of the fabric electronic system for detecting and treating muscle fatigue.

4. The fabric electronic system for detecting and treating muscle fatigue according to claim 3, characterized in that the signal adjustment circuit outputs a stimulating current using a constant current source, the amplitude of the stimulating current is controlled by a digital-to-analog converter of a microcontroller, the direction of the stimulating current is controlled by an H-bridge circuit at the load end of the constant current source, the duty cycle, frequency and amplitude of the stimulating current can be adjusted in real time, thereby ensuring that an electrically neutral current is output and preventing damage to the skin and tissue due to excessive current.

5. The textile electronic system for detecting and treating muscle fatigue according to claim 3, characterized in that, in the electrical stimulation application mode, the independent photocoupler isolators to which the first, second, and fourth electrodes are each connected are all shut off, and the photocoupler isolators in the H-bridge circuit are turned on and off in a predetermined order, and in the electromyography detection mode, the photocoupler isolators in the H-bridge circuit are shut off, and the independent photocoupler isolators to which the first, second, and fourth electrodes are each connected are all normally open.

6. The conductive fabric lines and physiological electrodes are formed by cutting the conductive fabric according to a pre-designed pattern using a laser, and then transferring the conductive fabric lines and physiological electrodes to both sides of the fabric substrate using a transfer method, so that the conductive fabric lines and physiological electrodes on both sides are in communication via the vertical interconnection vias, as described in claim 1, which is a fabric electronic system for detecting and treating muscle fatigue.

7. The aforementioned chip component is soldered to a conductive fabric line using solder paste to form a complete circuit, characterized in that the fabric electronic system for detecting and treating muscle fatigue is as described in claim 1.

8. The lower surface of the woven fabric substrate is formed in the following order: conductive woven fabric lines, a physiological electrode layer, medical double-sided tape, and a hydrogel layer, the medical double-sided tape and hydrogel layer being formed by laser cutting the medical double-sided tape to create grooves of the same shape as each physiological electrode, injecting a hydrogel precursor liquid into the grooves, and curing it with ultraviolet light, and the upper surface of the woven fabric substrate is arranged on the woven fabric substrate, characterized in that a woven fabric electronic system for detecting and treating muscle fatigue is provided as described in claim 1.

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