A dry electrode and wearable EEG detection device using an airbag to adjust the depth

Abstract

The invention discloses a dry electrode for adjusting depth by using an air bag and a wearable electroencephalogram detection device, wherein the air bag is clamped between a sleeve of the dry electrode and a probe base, and the height of the air bag can be continuously adjusted by inflating or exhausting the air bag, so that the depth of a probe can be continuously adjusted. For the same user, the height of the air bag can be shortened by reducing gas in the air bag so as to shorten the effective length of the dry electrode when the dry electrode is positioned at a convex position of a skull;the height of the air bag can be increased by injecting gas into the air bag so as to increase the effective length of the dry electrode when the dry electrode is positioned at a concave position ofthe skull, so that the full contact between the dry electrode and the scalp of the user can be ensured, the input impedance can be reduced, and the quality of a collected electroencephalogram signal can be improved. For different users, the height of the air bag can be changed by inflating or exhausting the air bag so as to change the effective length of the dry electrode, and probes can be matched with skull bones with different shapes and sizes.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a dry electrode and a wearable electroencephalogram detection device which use an airbag to adjust the depth. Background technique [0002] The brain is an important part of the human central nervous system and the material basis of all thinking activities. It integrates and records the information collected by the human sensory organs and responds to stimuli. Brain neural activity is the performance of human thinking, cognition and other activities. [0003] There are many methods for detecting brain nerve activity, among which electroencephalography (EEG) method refers to using the discharge phenomenon during neural activity to directly record the electric field strength of the brain with electrodes. Because EEG uses non-invasive electrodes to directly measure scalp electrical signals, it has the advantages of low price and high time resolution, so this method is w...

AI Technical Summary

Problems solved by technology

Because different users have different skull sizes, and the skull of the same person is not strictly spherical, it often occurs that some electrodes located in the depression of the skull cannot fully contact the scalp

Moreover, if there is too much hair, it will also make it difficult for the electrodes to contact the scalp, resulting in excessive impedance

If the impedance is too large, it will be difficult to collect EEG signals, resulting in erroneous diagnostic results, which will cause great harm to the health of patients

If a special order is made according to the shape of the user's skull, it will consume a lot of money and time

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