Bio-electricity signal sensor

Abstract

The invention relates to a bio-electricity signal sensor. The bio-electricity signal sensor comprises an electrode, an electrolyte, a cavity capable of holding the electrolyte, and a porous column, wherein one end of the cavity is a sealed end, and the other end of the cavity is connected with an electrolyte entering end, and another end of the porous column is a working end in contact with a living body; at least a part of electrode is located in the electrolyte, the electrode is a conductor, and the cavity is either a conductor or an insulator. The bio-electricity signal sensor provided by the invention has the main advantages of being simple in structure, reliable to contact, precise to locate, low and stable in electrode-skin impedance, low in noise measurement, low in artifact and convenient and comfortable to use, and is capable of recycling for a long time, thereby being applicable to relevant applications of bioelectricity recording, measuring and stimulation, and particularly applicable to electroencephalogram measurement.

Description

technical field [0001] The invention relates to a bioelectrical signal sensor, 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, brain-computer interface, Rehabilitation training, etc., especially suitable for EEG measurement. Background technique [0002] With the development of science and technology, bioelectricity has been widely used in the monitoring and diagnosis of various nervous system diseases, as well as rehabilitation equipment for bioelectrical feedback. Bioelectricity measurement is also an important experimental method in the study of cognitive psychology. The EEG signal is a very weak bioelectrical signal, generally at the microvolt level. Accurate acquisition of EEG signals requires sophisticated and reliable equipment systems. EEG measurement ...

AI Technical Summary

Problems solved by technology

[0004] 1. Professional medical staff are required to apply conductive glue or conductive paste, which limits the application range of wet electrodes in households, games, etc.; in addition, it takes a long time to apply conductive glue or conductive paste;

[0005] 2. Conductive glue or conductive paste is prone to cracking or falling off after long-term use, resulting in interruption of measurement, and is not suitable for long-term use of EEG rehabilitation equipment;

[0006] 3. The test subjects are often covered with conductive glue or conductive paste. After the test, the test subjects need to wash their hair, which brings discomfort to the test subjects

In addition, the operator needs to clean the electrode stained with conductive glue after measurement, which brings some troubles to the operator;

[0007] 4. For high-density electrode measurement (64 leads and above), the number of electrodes is large, and it takes a long time to inject glue. If the operator is not careful, some electrodes will not be injected with glue, which needs to be checked and re-injected.

The existing technologies of these dry electrodes all use direct contact between solid electronic conductors and the skin, and have failed to establish ideal ion channels. This electrode-skin contact method will cause high electrode impedance, and it is not stable, which brings measurement Noisy and Unstable Signals

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