Wet Electrode Based on Conductive Liquid

Abstract

The invention relates to a wet electrode based on a conductive liquid, wherein the wet electrode has a housing (4) closed at the top by a cover (3), in which a metal A plate (1), the wire (5) protruding from the housing (4) is electrically connected to the metal plate (1) for deriving the signal of the wet electrode, wherein the wet electrode also has at least two electrode posts assembly (10), and at least two holes (11) matching the number of the electrode column assemblies (10) are also provided at the bottom of the housing (4), wherein each electrode column assembly (10) Both protrude from corresponding holes (11) in the bottom of the housing (4) and are at least partially electrically conductively connected to the metal plate (1) at an end close to the holes (11).

Description

technical field [0001] The present invention relates to a wet electrode based on a conductive liquid. Background technique [0002] With the in-depth development of medicine, neuroscience, cognitive psychology, and artificial intelligence research, bioelectrical signals are being increasingly applied to medical testing, clinical diagnosis, and emerging brain-computer interfaces. As the interface between the living body and the external measuring equipment, the electrode plays the role of transmitting the bioelectrical signal to the measuring equipment, and its performance determines the quality of the bioelectrical signal. [0003] The surface wet electrode is a non-invasive electrode, which is easy to use, less harmful to the patient, and has high measurement accuracy. Compared with the dry electrode, it has lower skin contact impedance, which is beneficial to the collection of bioelectrical signals. At present, surface wet electrodes are mostly realized by adding a layer ...

AI Technical Summary

Problems solved by technology

The existing wet electrodes based on conductive liquid generally have the following two forms: one is an electrode column with a smaller diameter, which has the ability to pass through the hair and directly contact the scalp, but this kind of electrode has a small liquid storage volume and a long service life. Short, and due to the small contact area, the contact impedance is relatively large; the other is the electrode column with a larger diameter, which has a large liquid storage capacity, but it is easily blocked by the hair and cannot directly contact the scalp, and the conductive liquid Part of it will be absorbed by the hair, reducing the usage rate of conductive fluid

And because the conductive liquid plays the role of moisturizing the skin on the one hand, and also plays the role of conducting EEG signals on the other hand, as the use time increases, the conductive liquid stored in the water-absorbing material gradually decreases, making the contact impedance between the skin and the electrode Increase, so that the contact impedance becomes unstable, which is not conducive to the accurate acquisition of long-term bioelectrical signals

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