Brain electricity collecting device

Abstract

The invention discloses a brain electricity collecting device which particularly comprises an N-channel brain electricity collecting electrode, a brain electricity signal collector, a transmission module and a data receiving module. Brain electricity signals acquired by the N-channel brain electricity collecting electrode are fed into a high-impedance front buffer stage and then are converted into digital signals by a high-precision brain electricity collecting and converting module, the digital signals are transmitted into a digital signal processor, and processed signals are transmitted to the data receiving module according to particular requirements. The brain electricity collecting device has the advantages that the brain electricity collecting device is particularly provided with a 24-bit high-precision analog-digital conversion chip to directly acquire signals of relevant positions of the brain of a person, and digital signals converted by corresponding channels are subtracted from the signals, so that common-mode interference, device noise and other relevant background noise can be eliminated, and basically pure brain electricity signals can be obtained.

Description

technical field [0001] The invention belongs to the technical field of biomedicine, and in particular relates to the design of an electroencephalogram acquisition device. Background technique [0002] An EEG amplifier is an acquisition device that acquires brain signals in a non-invasive way. However, since EEG signals are submerged in environmental noise, when using analog circuits to remove noise, the analog circuits often cannot improve common-mode rejection due to limitations such as offset voltage. ratio, and the increase of analog devices will also increase device noise, so the signals collected by conventional EEG amplifiers are not only limited in frequency band, but also contain some noise interference, which not only increases the difficulty of subsequent processing but also reduces the Affects the progress of medical and scientific research. [0003] Although the EEG acquisition devices disclosed in CN201220428883.2, CN201120111758.4 and CN201210308665.X can coll...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a high-precision EEG signal acquisition device aimed at the problem that the existing EEG acquisition device is susceptible to noise interference and cannot obtain high-precision EEG signals.

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