Electroencephalogram (EEG) neural signal detector impedance test and activation matching system

Abstract

The invention discloses an electroencephalogram (EEG) neural signal detector impedance test and activation matching system, which comprises an upper computer and a lower computer, which are communicated with each other through a universal serial bus (USB), wherein the lower computer comprises a controller, an impedance analysis module, an excitation signal conditioning circuit, a feedback signalprocessing circuit, an electrode array switching switch, a channel switching circuit, a measurement circuit, a galvanization and activation module and a mode switching circuit; the controller controls the impedance analysis module to produce an alternative-current sinusoidal signal, and the signal is sent into a measured brain electric neural signal detector through the electrode array switching switch after being processed by the excitation signal conditioning circuit; and the controller is also connected with the channel switching circuit to realize the switching among circuits. The system is used for measuring and analyzing the impedance of the brain electric neural signal detector and for activating the brain electric neural signal detector which does not conform to signal collection requirements according to the requirement t be matched with a signal collecting system, so the integration of the automatic test, analysis, online test and analysis can be realized.

Description

technical field [0001] The invention belongs to the field of bioelectronic instruments, in particular to an EEG neural signal detector. Background technique [0002] The acquisition of EEG nerve signals is of great value for medical analysis, and the acquisition of signals also requires specific conditions and detection equipment. Accurate and effective acquisition of EEG nerve signals is a prerequisite for analysis of EEG nerve signals and diagnosis and treatment. The acquisition quality of the EEG signal mainly depends on the characteristics of the EEG neural signal detector, and the impedance characteristic is an important index reflecting the EEG neural signal detector. Therefore, to test and judge the impedance characteristic of the EEG neural signal detector, It is particularly important to ensure its working performance. [0003] At present, there is no similar product in China, and there are similar products in foreign countries, but only single-channel manual mea...

AI Technical Summary

Problems solved by technology

[0003] At present, there is no similar product in China, and there are similar products in foreign countries, but only single-channel manual measurement can be performed, and the array switching and activation matching functions cannot be completed. At the same time, the generated excitation signal is a fixed frequency (500Hz) square wave signal, which is not easy. In the later stage of data processing, the final data processing and display depend on a single-chip 31 / 2-bit voltage measurement chip, which cannot be used for data storage and analysis

Images