Flexible contact EEG electrode and preparation method thereof

Abstract

The invention belongs to the technical field of electrophysiological signal detection, and particularly relates to a flexible contact EEG electrode and a preparation method thereof. The EEG electrodeis composed of a flexible silica gel electrode piece and an electrode base, the upper layer of the flexible silica gel electrode is a flexible silica gel layer while the lower layer of the same is a composite conductive layer, and the electrode piece after being cut is a round electrode and a connection handle; the electrode base comprises a fixing nut of an electrode piece outer fixing buckle, anelectrode lead, an EEG cap fixing base, the electrode piece outer fixing buckle and an electrode lead fixing buckle, and the electrode piece outer fixing buckle fixes the silica gel flexible electrode piece onto the electrode base and is fixed by the fixing nut; the electrode lead and the flexible silica gel electrode piece are closely press-fitted from protrusions on the inner wall of the electrode outer fixing buckle and fixed onto the EEG cap fixing base by the fixing nut. The flexible contact EEG electrode has good contact effect and is convenient and comfortable to wear, low in impedancebetween the electrode and skin, excellent in conductivity and capable of collecting high-quality EEG signals.

Description

technical field [0001] The invention belongs to the technical field of electrophysiological signal detection, and in particular relates to an electroencephalogram electrode and a preparation method thereof. Background technique [0002] Electroencephalogram (Electroencephalogram, EEG) signal is a synthesis of potential information generated by the physiological activities of neuron cells on the surface of the cerebral cortex or scalp. machine interface (BCI), fatigue detection and other fields. It is considered to be the main method for detecting epileptic seizures, psychogenic non-epileptic seizures, migraine, encephalopathy and other diseases [2], and it is also an important basis for the diagnosis of sleep disorders. However, the amplitude of the EEG signal is generally less than 100 μV [3], so the capture of the EEG signal puts forward very high requirements on the EEG electrode itself and the subsequent conditioning circuit. Among them, the post-stage conditioning cir...

AI Technical Summary

Problems solved by technology

But the disadvantage is that it should avoid damage to the dermis and nerves and blood vessels when using it.

At the same time, although other fabric electrodes have a good application in wearable ECG and EMG signal acquisition systems, when they are applied to EEG acquisition, the contact impedance due to the poor contact caused by the hair and the impedance effect of the skin Further increases, making the acquisition of EEG signals more difficult

[0005] In order to overcome the shortcomings of traditional wet electrodes such as complex operation, difficulty in long-term wearable signal acquisition, and poor signal quality of dry electrodes, this invention proposes a flexible dry electrode based on a silica gel substrate.

Images