Portable collection device for high precision myoelectric signal

Abstract

The invention provides a portable collection device for a high precision myoelectric signal. The device comprises a power supply as well as a myoelectric signal collection module, a DSP and a Bluetooth connected in sequence. The myoelectric signal collection module comprises a surface electrode, a difference amplifier, a band-pass filter, a main amplifier, an electrical level lifting circuit, a high precision A / D and a buffer circuit. The DSP achieves digital processing as band-pass filtering for the signal, improved self-adaptive FIR notch filter for power-line interference, wavelet threshold denoising and the like as well as control for the whole device using a digital processing method. The Bluetooth sends the signal to a terminal using a digital processing method. The power supply supplies electricity for the whole device. The device combines an analog circuit and the digital processing technology, which enables very high input impedance and common mode rejection ratio, can effectively restrain noise, enables very high precision of the collected signal, has the advantages of low power consumption, is convenient to carry, and can be well applied to the fields of scientific research, wearable device, and the like.

Description

technical field [0001] The invention belongs to the field of human body bioelectric signal detection, in particular to a portable high-precision electromyographic signal acquisition device. Background technique [0002] Bioelectrical signals refer to regular electrical signals that are closely related to the state of life and are generated by living cells or tissues. Bioelectrical signals have been a hot area of ​​scientific research since their discovery. The greatest significance lies in the fact that bioelectrical signals, as important indicators of various physiological parameters of the human body, can realize the functions of various parts of the human body and the overall health through monitoring and analysis. The overall situation is more accurately controlled. [0003] As one of the important bioelectric signals of the human body, EMG is an extension of nervous system examination in the medical field and is widely used in neurology, rehabilitation, orthopedics, ...

AI Technical Summary

Problems solved by technology

[0004] Most of the existing electromyographic signal acquisition devices transmit electromyographic signals by wire, and the portability is poor; the input impedance is low, the signal loss is large, the ability to resist 50hz power frequency signal interference is weak, and the external noise interference is very large during signal acquisition, which makes the overall acquisition accuracy not tall

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