Biological body surface weak electrical signal acquisition and excitation control system

Abstract

A biological body surface weak electrical signal collection and excitation control system, the front end uses a flexible PCB board as the electrode detection array of the substrate, and is connected with a controllable channel selector through a shielded cable, and then connected with a single-chip microcomputer control system. The signal control terminal includes: a signal front-end input photoelectric coupling amplification module, a low-pass filter module, a single-chip microcomputer control module, an output amplification module, an external storage module, and an input keyboard. The single-chip microcomputer control module is connected to the storage module through a serial port. Through the scanning of the electrode array points, the state control of all electrode points is realized, so as to realize the efficient measurement of the electrode array.

Description

technical field [0001] The invention relates to a system suitable for collection and excitation control of weak electrical signals on the surface of biological bodies, in particular to an electrode array detection method for transmission characteristics of biological signals. Background technique [0002] The detection of electrical signals on the surface of living organisms has always been one of the difficult problems in the field of biomedicine. The detection of electrical signals on the surface of living organisms has the following problems: [0003] 1. The signal amplitude is very weak, such as nerve potential, electromyographic signal, etc., which cannot be directly obtained by conventional detection methods and equipment. If the amplifier is introduced, it will bring great interference and make the original signal characteristics be submerged by noise signals. [0004] 2. Most of the acquisition of existing bioelectrical signals uses microelectrodes, and in order to ...

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Problems solved by technology

[0003] 1. The signal amplitude is very weak, such as nerve potential, electromyographic signal, etc., which cannot be directly obtained by conventional detection methods and equipment. If an amplifier is introduced, it will bring great interference and make the original signal characteristics be submerged by noise signals

[0004] 2. Most of the acquisition of existing bioelectrical signals uses microelectrodes, and in order to obtain weak signals such as neural electrical signals and biological trigger signals, in order to avoid noise, invasive detection methods (such as needle electrodes, etc.) are used, not only for the measured Mobs deal extra damage and introduce new noise

[0005] 3. The biological signal is a non-stationary signal with strong randomness. According to different test conditions and requirements, the state of the electrode and the detection method need to be changed in time

[0006] 4. Due to the characteristics of organisms and biological signals, the existing detection electrodes cannot guarantee the consistency of test conditions

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