【作者】 徐昆良； 杜海涛； 全海燕； 王威廉；

【Author】 XU Kunliang DU Haitao QUAN Haiyan WANG Weilian School of Information, Yunnan University, Kunming 650091 School of Information Engineering and Automation, Yunnan Institute of Technology, Kunming 650093

【机构】 云南大学信息学院； 昆明理工大学信息工程与自动化学院；

【摘要】 心音、心电是人体重要的生理信号,载有人体心血管系统的生理、病理信息。心音、心电信号一般比较微弱,其采集过程容易受外界干扰。本文介绍了一种能提取微弱心音、心电信号的电路设计。该电路采取了一系列滤波措施,并在弱电信号与强电信号之间都采用光电隔离技术,保证了采集过程中病人的安全。并较好地解决了外界干扰问题,具有采集数据准确可靠、噪声小、成本低等特点。更多还原

【Abstract】 Heart sounds and ECG (Electrocardiograph) are human body’s important physiological signals, which carry the physiological and pathological information of cardiovascular system of the human body. Heart sound and ECG signals are very weak usually. Acquiring heart sound and ECG signals is often interfered by noises. This paper introduced a circuit design which can acquiring weak signals of heart sound and ECG The circuit contains high accuracy amplifiers, isolate circuits, band-pass filters, notch filters, level offset circuit, and rear-amplifiers etc. The most important feature in this system is special isolate technology be used to guarantee the patient’s safety during acquiring. The external interference and noises have been solved well. The system has excellent characteristics such as acquiring accurately and reliably, low noise, and low cost.更多还原