Anti-interference myoelectric biofeedback therapeutic instrument and anti-interfering method

Abstract

The invention discloses an anti-interference myoelectric biofeedback therapeutic instrument and an anti-interfering method. The therapeutic instrument comprises a CPU (Central Processing Unit), a high-voltage booster circuit, an electric stimulation output module, a load detection circuit, a storage module, a display module, a key module, a module switching circuit, a myoelectric signal input module, a frequency band selecting circuit and a signal amplifying circuit which are connected with each other, wherein the myoelectric signal input module comprises an electromagnetic compatibility suppressing circuit, a high-pass filter circuit, a common-mode detection circuit, a channel switching circuit, a balance attenuation circuit and a differential amplifying circuit; and the differential amplifying circuit comprises a parallel dual operational amplification circuit, a gain selecting circuit and a low-noise amplifying circuit. The method comprises the following steps of: comparing a common-mode voltage value with the input stage maximum common-mode input voltage of the differential amplifying circuit; and if the common-mode voltage value is larger, controlling to output a common-mode voltage signal to the balance attenuation circuit by using the CPU, and connecting to the differential amplifying circuit; otherwise, controlling to output the common-mode voltage signal to the differential amplifying circuit by using the CPU. According to the anti-interference myoelectric biofeedback therapeutic instrument, the noise suppressing capacity is increased, and operational amplifying saturation is avoided; and the anti-interference myoelectric biofeedback therapeutic instrument has high anti-interfering capacity, and is simple in structure.

Description

Technical field [0001] The invention relates to an electromyography biofeedback treatment instrument that can be used in a strong interference environment, and also relates to an anti-interference method for the electromyography biofeedback treatment instrument. Background technique [0002] Electromyography (Electromyography, EMG) is the superposition of motor unit action potertial (MUAP) in many muscle fibers. EMG signal detection is a simple, non-invasive, and easy-to-accept electromyography test activity. It can be used to test the muscle electrical signal in a large range of the human body, and helps to reflect the physiological and biochemical aspects of muscle during exercise. Changes can not only measure muscle activity in a static state, but also continuously observe changes in muscle activity during various exercises. It is a diagnostic evaluation method that is of great significance to human motor function, and it has also developed into a better biofeedback treatment...

AI Technical Summary

Problems solved by technology

[0004] One of the technical problems to be solved by the present invention is to provide an anti-interference myoelectric biofeedback therapeutic instrument, which overcomes the defects of the existing electromyographic biofeedback therapeutic apparatus and can be used normally in a strong interference environment

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