Electroencephalogram dry electrode and electroencephalogram collection equipment

Abstract

The embodiment of the invention relates to the technical field of an electronic product, and discloses an electroencephalogram dry electrode and electroencephalogram collection equipment. In the embodiment, the electroencephalogram dry electrode comprises a conductive connecting base, a hydrogel and an ion membrane, wherein the hydrogel is arranged on the conductive connecting base; the ion membrane is tightly attached to the surface of the hydrogel; when the ion membrane is in contact with the human body skin, the ion exchange between the skin surface and the hydrogel containing ions is allowed; charge exchange is performed between the conductive connecting base and the hydrogel so as to collect electroencephalogram signals. The embodiment of the invention also provides electroencephalogram collection equipment. The embodiment of the invention has the advantages that the contact resistance between the skin and the electrode is greatly reduced; the signal collection quality and the usecomfort degree are improved.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of electronic products, and in particular to an EEG stem electrode and an EEG collection device. Background technique [0002] EEG dry electrodes used to collect EEG signals have been gradually used as sensors in EEG collection equipment in recent years. Since there is no need for skin preparation and conductive paste application, it is very convenient to use and easy to maintain. There are two common common EEG rod electrodes. The first EEG dry electrode uses hard materials such as metal, plastic or conductive rubber as raw materials, and is processed into a flat plate or a raised electrode by using a chemical tool. The method of silver plating, silver plating layer chlorination or vapor phase deposition forms a stable silver-silver chloride plating layer on the surface of the electrode, and collects physiological signals such as EEG signals through direct contact between the elect...

AI Technical Summary

Problems solved by technology

[0003] However, the inventors have found that there are at least the following problems in the prior art: no matter what kind of EEG dry electrode, the contact impedance between the electrode and the skin surface has been improved a lot compared with the traditional wet electrode, which reduces the signal Accuracy

For example, the first type of EEG stem electrode is easily affected by electromagnetic interference from the external environment and motion artifacts caused by human movement due to the high contact impedance between the electrode and the skin surface, resulting in a large amplitude in the collected signal. Interference, in order to reduce interference, a certain pressure is usually applied to keep the electrodes in close contact with the human skin so as to collect stable signals as much as possible. However, due to the hard electrode material, it is easy to cause discomfort to the human body when used for a long time

Compared with the first type of EEG stem electrode, the existing second EEG stem electrode uses PDMS as a flexible base material that is more suitable for the skin and improves the comfort of use. However, the contact between the electrode and the skin surface Impedance is still high and susceptible to interference

Images