Biological-body-surface weak-electric-signal collecting and exciting control system

Abstract

The invention discloses a biological-body-surface weak-electric-signal collecting and exciting control system.A flexible PCB is used as an electrode detecting array of a substrate at a front end, and the front end is connected with a controllable channel selector through a shielding cable, and is further connected with a single-chip microcomputer control system.A signal control end comprises a signal front-end input photocoupling amplifying module, a low-pass filtering module, a single-chip microcomputer control module, an output amplifying module, an externally-connected storage module and an input keyboard, and the single-chip microcomputer control module is connected with the storage module through a serial port.As electrode array points are scanned, controlling over the states of all the electrode points is achieved, and therefore efficient measuring of the electrode array is achieved.

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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