Detection method of biological surface electrical signal

Abstract

A method for detecting electrical signals on the surface of a living body. The single-chip microcomputer scans and detects electrode signals at different positions on the substrate, and temporarily stores the detection results in E2ROM or external memory. Determination. After all scans are completed, take the maximum value Vm, and calibrate the electrode points one by one again. The calibration method is: heating each electrode point, and the detection value Vi (i=1, 2, 3...) will increase in the later stage of heating. , until it rises to within the 5% error limit of the Vm value, and this cycle is repeated until the difference between the detection target values ​​of each electrode point is within 5%, and the actual detection can be started. In this way, other introduced errors such as contact resistance, humidity change, and external interference can be offset by the error of temperature drift, and the error of detection can be minimized.

Description

technical field [0001] The invention relates to a method for using a detection electrode array suitable for weak electric signals on the surface of a living body, in particular to a method for detecting electric signals on the surface of a living body. 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 obtain weak signals such...

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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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