Tough claw type dry electrode used for recording electroencephalogram and preparation method

Abstract

A tough claw type dry electrode used for recording an electroencephalogram and a preparation method are provided. The tough claw type dry electrode used for recording the electroencephalogram comprises a bottom plate, a plurality of claw handles and a handle, wherein the bottom plate is round; the plurality of claw handles stretch out from the edge of the bottom plate in a radial shape to form a pre-set included angle with the bottom plate; the handle is located at the center of the bottom plate. The tough claw type dry electrode has high toughness and signal-to-noise ratio; the claw type structure penetrates hairs to prevent from contact with scalps so that the electroencephalogram at a computer hair region can be acquired and recorded; the tough claw type dry electrode has the advantages of simple structure and easiness for preparation.

Description

technical field [0001] The invention relates to the field of a weak electroencephalogram signal acquisition and recording electrode and its processing, in particular to a tough claw-type dry electrode for electroencephalogram signal recording and a preparation method. Background technique [0002] Electroencephalogram signal (EEG) is a spontaneous electrical activity generated by brain nerve activity and exists in the central nervous system. It contains rich activity information such as brain sensation, consciousness, and command, and is an important bioelectrical signal. Through the research and analysis of EEG signals, we can understand the mechanism of brain activity and human cognitive process, and realize clinical diagnosis and brain-computer interface applications. Therefore, how to comfortably and stably extract high signal-to-noise ratio EEG signals is the top priority for its wide application, and the acquisition sensor, as the front-end sensing element in the brain...

AI Technical Summary

Problems solved by technology

In traditional EEG signal research systems, silver / silver chloride wet electrodes are usually used to collect EEG signals. Although this wet electrode can collect EEG signals with high signal-to-noise ratio, it has many problems Disadvantages: First, because the wet electrode needs to be coated with conductive paste containing high concentration of conductive ions before use, the conductive paste can diffuse into the stratum corneum to improve its conductivity, thereby reducing the interface impedance between the electrode and the skin and improving The signal-to-noise ratio of the bioelectric signal is collected, so the whole use process becomes time-consuming and cumbersome; secondly, because the conductive paste will dry out with the passage of time, it is necessary to refill the conductive paste repeatedly in long-term applications , which also makes it unsuitable for long-term monitoring of bioelectrical signals

However, there are still many problems in the use of these dry electrodes, such as not being able to be used in the hair area, the structure is too hard to be comfortable, and the cost is high.

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