Brain electricity collecting device

An acquisition device and EEG technology, applied in the field of biomedicine, can solve problems such as noise interference and inability to obtain high-precision EEG signals, and achieve the effect of eliminating common-mode interference

Active Publication Date: 2014-01-22
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to propose a high-precision EEG signal acquisition device aimed at the proble

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Example Embodiment

[0009] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0010] The EEG acquisition device of the present invention specifically includes: N-channel EEG acquisition electrodes, an EEG signal collector, a transmission module, and a data receiving module, wherein the EEG signal collector includes a first N-channel high-impedance front-end Buffer stage, high-impedance pre-buffer stage of the second N-channel, high-precision EEG acquisition and conversion module of the first N-channel, high-precision EEG acquisition and conversion module of the second N-channel and digital signal processor, N-channel EEG The acquisition electrodes are respectively connected to the non-inverting input terminals of the high-impedance pre-buffer stage of the first N channel, and the N EEG reference signals corresponding to the N-channel EEG acquisition electrodes are respectively connected to the high-impedance pre-buffer stage of the...

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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...

Claims

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Application Information

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IPC IPC(8): A61B5/0476
Inventor 郜东瑞刘铁军尧德中刘志煊曾昭龙
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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