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Low-noise electroencephalogram signal acquiring system

An EEG signal and acquisition system technology, applied in the biomedical field, can solve problems such as uncontrollable sampling frequency and data transmission rate, unfavorable flexible application of EEG acquisition system, affecting EEG signal collection and processing, etc., to solve environmental noise interference effect

Active Publication Date: 2016-12-21
SOUTH CHINA UNIV OF TECH
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AI Technical Summary

Problems solved by technology

At present, the existing EEG acquisition system is to transmit the weak EEG signals collected by the EEG electrodes to the EEG signal processing device for processing through a long guide. The transmission of weak EEG signals in long wires is easily disturbed by environmental noise. , affecting the collection and processing of EEG signals by the EEG acquisition system
At the same time, the existing EEG acquisition system cannot externally control its sampling frequency and data transmission rate, which is not conducive to the flexible application of the EEG acquisition system under different requirements

Method used

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  • Low-noise electroencephalogram signal acquiring system

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and do not limit the protection scope of the present invention.

[0028] Such as figure 1 As shown, it is an overall block diagram of a low-noise EEG signal acquisition system provided by the present invention, including N active EEG electrodes 11, N triaxial connecting lines 12, N EEG signal conditioning modules 13, multiple The integrated transmission module 14, the data receiving and display terminal 15 and the controller 16; N≥2.

[0029] The N active EEG electrodes 11 are used to collect EEG signals at different positions, and the output ends of the N active EEG electrodes 11 are connected to the input ends of the N triaxial conn...

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Abstract

The invention discloses a low-noise electroencephalogram signal acquiring system. The system comprises N active electroencephalogram electrodes, N triax connecting wires, N electroencephalogram signal conditioning modules, a multiplexing conformity sending module, a data receiving and displaying end and a controller. The active electroencephalogram electrodes with high-impedance amplifiers are adopted, so that electroencephalogram signals are transmitted after being amplified; meanwhile, by means of the novel shielding mode adopting triax connectors and the triax connecting wires, the defect that weak electroencephalogram signals are susceptible to interference of environment noise during long-distance transmission can be effectively overcome; meanwhile, the sampling frequency and data transmission speed of the system can be adjusted through corresponding control instructions so that the system can be used under different sampling frequencies and data transmission speeds.

Description

technical field [0001] The invention relates to the field of biomedical technology, in particular to a low-noise electroencephalogram signal acquisition system for body surface. Background technique [0002] EEG signals are bioelectrical signals generated by nerve cell activity, which carry the corresponding physiological and pathological information of the brain, and have important research significance in medical diagnosis, scientific exploration and engineering applications. EEG signals can be used for auxiliary diagnosis and mechanism research of brain diseases such as epilepsy and Parkinson's. Certain characteristics of EEG signals have important application value in brain-computer interface engineering. In order to meet the needs of EEG signal research, an EEG signal acquisition system is required to complete the acquisition, collection and processing of EEG signals. EEG signals are weak signals, usually only in the millivolt or even hundreds of microvolt range, and ...

Claims

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Application Information

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IPC IPC(8): A61B5/0476A61B5/00
CPCA61B5/7203A61B5/7225A61B5/369Y02D30/70
Inventor 李斌马衡禹赵明剑吴朝晖
Owner SOUTH CHINA UNIV OF TECH
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