Portable multi-lead electrocardio acquisition system and method based on capacitive coupling electrode

Abstract

The invention discloses a portable multi-lead electrocardio acquisition system and method based on a capacitive coupling electrode, a coupling electrocardio electrode is not in direct contact with the skin, a gap capacitance is formed between the coupling electrocardio electrode and the skin to couple electrocardio signals, a signal processing unit is utilized to obtain common-mode interference signals according to received signals, and compared signals are converted by an A / D conversion unit and are output by a transmission unit, and meanwhile, common-mode interference signals led out by the signal processing unit are superposed by a right leg driving unit and are fed back to a human body through an electrode by a reverse-phase amplification circuit to form feedback, an acquisition mode based on the capacitive coupling electrode is adopted, the multi-lead electrocardio acquisition system can realize long-term acquisition of multi-lead electrocardiosignals, does not need assistance of conductive adhesive in the use process, and is simple in structure and accurate in signal acquisition. A double-layer PCB is a circular PCB, a concentric shielding ring arranged at an interval with the coupling electrocardio electrode is arranged on the outer ring of the coupling electrocardio electrode, the gap capacitance can be formed between the coupling electrocardio electrode and the skin to couple electrocardio signals, and the coupling electrocardio electrode does not need to be attached to the skin.

Description

technical field [0001] The invention belongs to an electrocardiogram collection system, in particular to a portable multi-lead electrocardiogram collection system and method based on capacitive coupling electrodes. Background technique [0002] With the aging of my country's social population, the prevalence of cardiovascular diseases is becoming more and more obvious, and the fast-paced, high-intensity and high-pressure urban life also makes the incidence of cardiovascular diseases appear younger. At present, there are 290 million people suffering from cardiovascular disease, accounting for about 20% of the national population. The mortality rate of cardiovascular disease still ranks first, much higher than that of tumors and other diseases, and the mortality rate is still increasing. [0003] Clinically, electrocardiogram (ECG) monitoring is used in most patients with cardiovascular diseases to detect the specific cause and incidence of the disease. ECG electrodes are an ...

AI Technical Summary

Problems solved by technology

Dry-type electrodes mainly use impedance dry-type electrodes, which directly contact the metal electrode with the skin to transmit signals. At present, the signal extraction only stays in the form of single-channel acquisition, which has the disadvantages of large signal-to-noise ratio and susceptible to interference, and signal processing The accuracy is low; and the equipment structure is relatively large, it is inconvenient to carry, and it cannot effectively realize long-term monitoring

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