Active double electrode surface electromyography sensor

Abstract

The invention relates to animal muscle diagnosis and human body bioelectricity acquisition and recognition. The invention relates to electrode conductors for collecting surface electromyography signals, a functional buffer stage circuit, a preposing differential amplifying circuit, a filter circuit, a double T trap circuit and a back-stage amplifying circuit; the preposing differential amplifying circuit comprises a preceding stage differential amplifying circuit and a secondary differential amplifying circuit; the output end of the preceding stage differential amplifying circuit is also connected with a voltage follower circuit and an inverse amplifying feedback circuit which is communicated with the voltage follower circuit; the output of the inverse amplifying feedback circuit is communicated with the root of the electrode conductor; the filter circuit is the fifth-order Butterworth filter circuit; the electrode conductors are two silver electrodes which are pasted on the surface of skin; and the distance between the two silver electrodes is 8-12mm. The active double electrode surface electromyography sensor has good fixed mode, stable collected signals and strong signal filtering function, causes the capability of the circuit resisting the interfering of the power frequency to be increased and overcomes the defects of the high noise brought about by the electrode wiring, larger whole volume of the sensor and the like.

Description

technical field [0001] The invention relates to an instrument technology for animal muscle nerve diagnosis and human body bioelectricity collection and identification, and also relates to the application of an operational amplifier and a circuit noise reduction method. Background technique [0002] With the development of neuromedicine, sports and health science, and rehabilitation engineering, people pay more and more attention to the detection and identification of muscle movement, muscle function diseases, motor nerves and nerve rehabilitation. Painless and portable surface electromyography signal detection is one of the important medical detection methods, and the demand for this type of medical diagnosis and treatment equipment in the market is growing rapidly. Among them, the sensor that is in contact with the human skin and acquires surface electromyographic signals is one of the key components that determine the detection accuracy and portability of this type of inst...

AI Technical Summary

Problems solved by technology

Although this circuit has the characteristics of small and dense electrode collection points, its circuit only uses a two-stage operational amplifier circuit, and the signal gain is small; it uses ordinary low-pass filtering and high-pass filtering, and the signal filtering function is not strong, resulting in a high signal-to-noise ratio. Not high; the area of ​​the electrode collection point is small, which also affects the reliability of the data to a certain extent

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