Physiological electric signal detection device based on flexible non-contact electrode

Abstract

The invention provides a physiological electric signal detection device based on a flexible non-contact electrode. The physiological electric signal detection device comprises the flexible non-contactelectrode, a shielding line and a signal acquisition module, wherein the signal acquisition module comprises an impedance matching unit, an anti-aliasing filter unit and an analog-to-digital conversion unit; the flexible non-contact electrode is used for detecting potential change of human body surface through a coupling capacitance which is formed by the flexible non-contact electrode and humanbody skin; the shielding line is used for transmitting a potential change signal to an input end of the impedance matching unit and for conducting electromagnetic interference shielding on the potential change signal in a transmitting process; the impedance matching unit is used for conducting signal amplifying processing on the potential change signal; the anti-aliasing filter unit is used for conducting filtering processing on the amplified potential change signal; and the analog-to-digital conversion unit is used for conducting analog-to-digital conversion processing on the amplified and filtered potential change signal, so that a physiological electric signal of human body is obtained. The detection device provided by the invention has the advantages of being comfortable to wear, goodin shielding performance, strong in anti-interference performance, simple in circuit structure, high in precision and low in cost.

Description

Technical field [0001] The invention belongs to the field of physiological electrical signal detection, and specifically relates to a physiological electrical signal detection device based on a flexible non-contact electrode. Background technique [0002] The wearable health monitoring system uses wearable biosensors to collect human motion and physiological parameters to realize the management of the wearer's exercise and health. Electrocardiogram (ECG) and brain electricity (Electroencephalogram, EEG) are key physiological indicators for diagnosing human diseases and monitoring human health. Although wireless technology and the miniaturization of electronic devices have made great progress, the application and promotion of ECG and EEG in wearable health monitoring systems are still largely limited by the shortcomings of traditional electrodes. Traditional ECG and EEG measurements generally require the use of conductive paste to reduce the contact resistance between the electro...

AI Technical Summary

Problems solved by technology

At the same time, in the existing active electrode or non-contact electrode scheme, the back of the electrode contains a chip without exception. The chip itself has a certain thickness and hardness. Such electrodes are less comfortable to wear and are not conducive to long-term monitoring.

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