生物心电信号前端处理系统设计  

Design of front-end processing system for biological ECG signal

作　　者：凌晓艳 Ling Xiaoyan(GuangZhou University Sontan College,Guangzhou Guangdong,510000)

机构地区：[1]广州大学松田学院,广东广州510000

出　　处：《电子测试》2020年第13期5-7,14,共4页Electronic Test

摘　　要：本文分析心电信号的主要特点,针对心电信号的微弱与多干扰等特性,对心电信号采集过程中的前端处理系统进行探究,通过仿真和实际电路测试,设计一个准确、有效的心电信号采集中的前端处理系统。本系统设计接口保护电路,采用高输入阻抗放大器获取微弱信号,以及对相关滤波电路改进和仿真,采用低通滤波器和高通滤波器分别去除低频的肌电、呼吸干扰和高频电磁干扰。采用右腿驱动电路来抑制其中的工频干扰。最后进行测试,给出结果。实践结果表明,该系统满足要求的精度和准确度,有一定的实用价值与探索价值。In this paper,the main characteristics of ECG signals are analyzed.For the weak and multi-interference characteristics of ECG signals,Through simulation and actual circuit test,design an accurate and effective front-end processing system in ECG signal acquisition.Interface protection circuit is designed and using high input impedance amplifier to obtain weak signal in this system,And the related filter circuits are improved and simulated,a low-pass filter and a high-pass filter are used to remove low-frequency EMG,respiratory interference,and high-frequency electromagnetic interference.The circuit driven by the right leg is used to suppress the power frequency interference.Finally,practical results show that the system meets the required precision and accuracy,and has certain practical value and exploration value.

关 键 词：心电信号 信号处理系统 心电监护 心电图 

分 类 号：TN911.7[电子电信—通信与信息系统] R540.4[电子电信—信息与通信工程]