摘要
结合检测与转换技术课程中信号放大和信号滤波两大教学核心内容,以心电信号为对象,设计了符合实验教学的心电信号检测、放大与调理电路,设计四阶低通滤波器和工频50Hz陷波器滤除干扰,采用光电隔离器对人体进行保护,再利用后置放大电路对心电信号进行二次放大,获得幅值在±5V左右的清晰的心电波形。电路可在万用板上焊接完成,因此不仅提高了学生的动手能力,更有利于加强学生对理论教学内容的理解。
Based on the signal amplification and signal filtering in the undergraduate course of Detection and Conversion Technology ,an ECG signal detection ,amplification and processing circuit is designed .The weak signals on the ECG electrode are firstly magnified by an amplifier ,and a four-order low-pass filter and 50 Hz notch filter are designed ,according to ECG characteristics and types of interference ,and the optical isolator and amplifier circuit are used to guarantee the ECG signal and to get a clear picture of cardiac waveform , valued about 5V .The circuit consists of basic components such as resistors ,capacitors ,photocoupler and can be completed in universal plate easily .Therefore ,it’s not only to improve students’ practical ability ,but also to strengthen the students’ understanding of the theoretical teaching contents .
出处
《实验技术与管理》
CAS
北大核心
2014年第2期41-44,共4页
Experimental Technology and Management
基金
中央高校基金项目(HEUCF041335)
黑龙江省高等教育教学改革项目(JG2012010147)
关键词
心电检测
放大电路
滤波器
ECG detection
amplifier circuit
filter
