一种基于ARM控制器的心电采集系统的设计

Design of ECG acquisition system based on ARM controller

目的:设计一种基于ARM控制器的心电采集系统,对心电检测时产生的干扰和噪声进行有效抑制。方法:心电采集系统以ADUC7020为模拟控制器,外围由缓冲放大电路、右腿驱动电路、前置放大电路、带通滤波电路、主放大器电路和50 Hz陷波电路等组成。结果:系统可将弱小的心电信号经过放大滤波,得到具有诊断价值的心电信号,然后由模拟控制器转换为数字信号发送到个人计算机(PC)做进一步处理。结论:基于ARM控制器的心电采集系统可有效抑制心电检测时产生的干扰和噪声,增强心电信号的有用成分。

Objective To design an electrocardiograph （ECG） acquisition system based on ARM controller in order to effectively control the interference and noise when the ECG detection was applied. Methods： The ADUC7020 was used as simulation controller in ECG acquisition system, and its periphery was consisted of buffer amplifying circuit, driving circuit of right leg, preposition amplifying circuit, band pass filtering circuit, main amplifier circuit and 50 Hz trapped wave circuit. Results： This system can get a valuable diagnosing electrical signals from weak electrical signals through the amplified filtering wave, and these electrical signals were converted to digital signals by simulation controller. Then, they were send to personal computer （PC） to accept more analysis and disposes. Conclusion： This system based on ARM controller can effectively suppress the interference and noise when using ECG technology, and enhance the effective electrical signals.