A kind of four-channel surface electromyography active concentric circular electrode and preparation method thereof

Abstract

This patent relates to a four-channel surface myoelectric active concentric circular electrode and a preparation method thereof. The electrodes are mainly composed of FPC flexible substrates, concentric electrodes, reference electrodes and power conversion circuits. The instrumentation amplifier with minimal current noise is used to design the active electrode, thereby avoiding the introduction of internal noise and electromagnetic noise of the amplifier from the source; concentric circle spatial filtering can reduce myoelectric crosstalk; the front-end resistance-capacitance filter network avoids the interference of artifacts Amplification; the immersion gold treatment of the electrode reduces the contact resistance and improves the durability of the electrode; reasonable wiring and large-area copper laying further weaken the electromagnetic interference. Compared with the EMG collection electrodes commonly used in the market, this electrode has better anti-noise performance, better motor unit action potential resolution ability, stronger surface corrosion resistance, and simpler structure, easy to use are worn. The electrodes are suitable for collecting high-quality surface electromyographic signals, which can be used for research such as gesture recognition.

Description

technical field [0001] This invention patent relates to a four-channel surface electromyography active concentric circular electrode and its preparation method. The electrode can realize the collection of high-quality myoelectric signals, and is suitable for fields such as myoelectric gesture control. Background technique [0002] At present, the commonly used surface electromyography signal (sEMG) acquisition mostly uses passive electrodes, that is, each electrode itself is connected to the acquisition circuit board independently through a shielded wire. This design is not only bulky and has many connections, but also the anti-interference ability of the signal is often not strong. The active electrode is an electrode that closely integrates the electrode and the preamplifier circuit. Through impedance transformation and amplification, the anti-interference ability of the signal will be significantly enhanced. At present, active electrodes are mostly used in array electro...

AI Technical Summary

Problems solved by technology

There have been studies on concentric circular differential electrodes, but there is no precedent for designing active electrodes with concentric circular structures

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