Portable wireless electroencephalogram acquisition device

Abstract

The invention relates to a portable wireless electroencephalogram acquisition device which comprises a plurality of scalp electrodes. The scalp electrodes are connected with the input end of an electroencephalogram acquisition module and used for acquiring electroencephalogram signals; the output ends of the scalp electrodes are connected with an electroencephalogram signal extraction module; and the electroencephalogram signals processed by using the electroencephalogram signal extraction module are input into an electroencephalogram signal processing module and sent to an electroencephalogram signal receiving end in a wireless way. The volume of the front-end circuit of the traditional electroencephalogram acquisition system is greatly reduced, and the wireless electroencephalogram acquisition device is hereby portable. Due to the adoption of the wireless transmission way, the restriction of the wired electroencephalogram acquisition system to the spacial position of the tested object is eliminated. The processing of the analog signal in the traditional electroencephalogram acquisition system is converted into the processing of the digital signal, and due to the adoption of the digital signal processing method, the parameters of the electroencephalogram acquisition system can be adjusted flexibly, the electroencephalogram acquisition system can be optimized, and the cost of the electroencephalogram acquisition system can be reduced.

Description

technical field [0001] The invention relates to an EEG acquisition device, in particular to a portable wireless EEG acquisition device. Background technique [0002] EEG Figure 1 It has always been an important means for the diagnosis of clinical neurological diseases and the research of cognitive physiology and psychology. The performance of the EEG signal acquisition device will directly affect the reliability of the system and the effectiveness of the treatment. Most of the existing EEG acquisition and processing systems transmit the signals to the host computer through cables. [0003] The EEG electrode is a high-impedance signal source, and the preamplifier uses an instrumentation amplifier with high input impedance (over 10 megohms) and high common-mode rejection ratio. Before the EEG signal enters the ADC, it must be amplified, so that the output dynamic range of the ADC can be fully utilized. The range of a typical ADC is 2.5V, which requires the gain of the EEG a...

AI Technical Summary

Problems solved by technology

Such an acquisition device is difficult to miniaturize, especially when the number of acquisition channels increases, the volume of the device will increase significantly

This design method is difficult to realize the miniaturization and portability of the system

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