Myoelectric signal acquisition device and acquisition processing method thereof

An electromyographic signal acquisition and electromyographic signal technology, which is applied in the field of electromechanical signal acquisition devices and their acquisition and processing, can solve problems such as increased data processing difficulty, limited application occasions, large power frequency interference, etc., and achieves that it is difficult to collect environmental interference. , Low data processing difficulty, and the effect of avoiding interference

Pending Publication Date: 2016-11-09
CHENGDU PEACE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) Special instruments are required to complete signal acquisition, and the application occasions are limited, such as the SEMG of athletes' limbs in sprinting cannot be collected;
[0006] (2) Because there are wires connected, it is easy to cause relative movement between the electrode and the skin when the body moves, which will affect the acquisition results;
[0007] (3) The power supply is obtained after being processed by the mains, which introduces a large power frequency interference and increases the difficulty of data processing;
[0008] (4) If the wire is long, it is very easy to introduce other interference in the environment, such as electromagnetic interference, etc.

Method used

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  • Myoelectric signal acquisition device and acquisition processing method thereof

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specific Embodiment 1

[0044] Such as figure 1 The shown electromyographic signal acquisition device includes a body surface welt electrode for obtaining electromyographic signals, and a signal conditioning circuit for processing electromyographic signals; the signal conditioning circuit is connected to the MCU, and also includes a myoelectric signal conditioning circuit connected to the MCU. Signal storage unit; the electromyographic signal conditioning circuit includes a high-pass filter, an amplifier and a low-pass filter connected in sequence, and the collected electromyographic signal is sent to the MCU after high-pass filtering, amplification and low-pass filtering; the electrodes adopt Ag and / or AgCl surface electrodes, one electrode is composed of three Ag and / or AgCl electrodes parallel to each other, the middle electrode is the reference ground terminal, and the two on both sides form the differential input terminal.

[0045] In this specific embodiment, the amplifier adopts the amplifier ...

specific Embodiment 2

[0047] On the basis of the first embodiment, the power supply circuit is a battery power supply circuit. The battery power supply circuit is powered by a battery with stable and pure voltage. The interference easily introduced by external wires is avoided, so the common 50Hz notch filter can be omitted. Using a 50Hz notch filter has the disadvantage of eliminating part of the useful 50Hz signal.

specific Embodiment 3

[0048] On the basis of the specific embodiment 1 or 2, the MCU adopts a peripheral chip of the model MSP430F167, uses ADC12 to sample the electromyography signal, and performs filtering processing on the sampling result.

[0049] The MCU adopts MSP430F167, which has rich internal and external peripherals, including DMA, 12-bit AD module (ADC12), hardware multiplier (MPY), USART, 16-bit Timer and up to 48 I / O ports. In this device, the ADC12 is used to sample the electromyographic signal, and the sampling result is filtered to improve the accuracy of sampling; the use of DMA with ADC12 greatly improves the speed of reading AD sampling results; MPY greatly improves the data processing speed. In this specific embodiment, the device runs on an 8M clock, and the sampling frequency is set to 2000 Hz, which fully meets the sampling interval requirement.

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Abstract

The invention provides a myoelectric signal acquisition device and an acquisition processing method thereof. The myoelectric signal acquisition device comprises a surface facing electrode and a signal conditioning circuit for processing myoelectric signals, wherein the signal conditioning circuit is connected with an MCU and also comprises a myoelectric signal storage unit connected with the MCU; the myoelectric signal conditioning circuit comprises a high-pass filter, an amplifier and a low-pass filter which are connected in sequence, and acquired myoelectric signals are subjected to high-pass filtering, amplifying and low-pass filtering and then transmitted to the MCU; and electrodes adopt Ag and/or AgCl surface electrodes, one electrode is composed of three Ag and/or AgCl electrodes parallel to each other, the intermediate electrode serves as a reference ground end, and the two electrodes at two sides are composed into a differential input end. Compared with the prior art, the acquisition environment interference is avoided, and the data processing difficulty is low; and batteries are used for supplying power, thereby avoiding the interference of easy leading-in of external wires.

Description

technical field [0001] The invention relates to a myoelectric signal acquisition device and its acquisition and processing method, in particular to an electromechanical signal acquisition device and its acquisition and processing method suitable for collecting myoelectric signals from motor units in numerous muscle fibers. Background technique [0002] Electromyography (EMG) is the temporal and spatial superposition of motor unit action potentials (MUAPs) in numerous muscle fibers. Surface muscle signal (SEMG) is the comprehensive effect of superficial muscle EMG and electrical activity of neurons on the skin surface, which can reflect neuromuscular activity to a certain extent; compared with needle electrode EMG, SEMG is non-invasive and effective in measurement. Non-invasive, simple operation and other advantages. Because SEMG has important practical value in clinical medicine, ergonomics, rehabilitation medicine and physical science. [0003] With the development of det...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/0488A61B5/0492A61B5/296
CPCA61B5/6833A61B5/7203A61B5/7225A61B2560/0214A61B2560/0209A61B5/296A61B5/389
Inventor 谢敏
Owner CHENGDU PEACE TECH CO LTD
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