Bioelectric electrode

Abstract

The invention relates to a bioelectric electrode which is extensively applied to bioelectric recording, measurement and stimulation, including high-density electrode measurement, medical facilities, mobile equipments, family health care, psychological cognition, games, a brain-computer interface, rehabilitation training and the like, and is particularly applicable to electroencephalogram measurement. An electrode tip is a columnar pipe, and the middle part of the electrode tip is provided with an electrolyte circulating hole; one end of the electrode tip is a working end in contact with a living body, and the other end of the electrode tip is an electrolyte entering end; the electrode tip is located on one end plane of an electrode body; the middle part of the electrode body is provided with a cavity used for accommodating an electrolyte and communicating with a middle through hole; the electrode tip is a conductor, and the electrode body is either a conductor or an insulator; the electrode tip is communicated with an external circuit directly through the electrode body. The bioelectric electrode provided by the invention has the main advantages of being simple in structure, low and stable in electrode impedance, low in measurement noise, small in artifact, convenient and comfortable to use, and an electrolyte ion conductor and an electrode tip electronic conductor are simultaneously in contact with the skin, thereby being applicable to the relevant applications of bioelectricity recording, measuring and stimulation.

Description

technical field [0001] The invention relates to a bioelectric electrode, which belongs to the technical field of bioelectricity and is widely used in bioelectricity recording, measurement, and stimulation, including high-density electrode measurement, medical equipment, mobile equipment, home health care, psychological cognition, games, and brain computers. Interface, rehabilitation training, etc., especially suitable for EEG measurement. Background technique [0002] With the development of science and technology, electroencephalogram measurement (EEG) has been widely used in the monitoring and diagnosis of various neurological diseases, and rehabilitation equipment for EEG feedback. EEG measurement is also an important experimental method in cognitive psychology research. In order to obtain accurate weak EEG signals, good contact between the electrodes and the scalp is required, and the electrode impedance is low and stable. Electrode impedance for EEG measurement is gen...

AI Technical Summary

Problems solved by technology

[0003] 1. It takes a lot of time to coat conductive glue (paste) on this kind of "gum-based" electrode, especially for high-density electrode measurement;

[0004] 2. Conductive glue (paste) is easy to dry out or fall off after long-term use, resulting in interruption of measurement, and is not suitable for long-term EEG measurement;

[0005] 3. The use of conductive glue (paste) brings discomfort to the subject, and the conductive glue needs to be cleaned after measurement;

[0006] 4. The use of conductive glue may cause a "short circuit" of conductive glue between adjacent electrodes, which will affect the measurement

Since the rigid hollow pillars used as supports are non-electronic conductors, the volume occupied by the water-absorbing material in the middle is small, and the gel or water-absorbing material will shrink into the small tube, resulting in unstable electrode impedance, which cannot meet the requirements of long-term EEG testing.

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