中文摘要：

目的：设计一种便携式心电监护仪,用户只需左右手对称的两根手指放在相应电极上即可完成心电检测,摒弃电极线的束缚,同时具有心电图显示、平均及瞬时心率检测、心率失常检测、导联脱离检测、心电数据存储和发送功能。方法：首先应用BMD101芯片对心电信号进行前期的滤波,放大,然后由处理器对心电信号再次进行软件滤波,提取心电信号中的R波峰点,进而求取用户心电参数,最后由相应模块进行结果显示、存储、发送。结果：心电波形经过软硬件滤波后,滤除了心电波形中的工频干扰和基线漂移,通过差分阈值法提取心电波形中的R波峰点,准确率为98.57%。结论：该心电监护仪能对用户的心电信息进行准确提取,同时具有体积小、功耗低、携带方便,检测过程无任何束缚的特点,能满足用户的实际需要。

英文摘要：

Objective We aim to develop a portable electrocardiograpy（ECG） monitor with which the user only needs to put two symmetrical fingers of the left and right hands on the corresponding electrodes to complete the ECG detection, abandoning the shackles of the electrode line. The developed monitor has the functions of ECG display, average and instantaneous heart rate detection, arrhythmia detection, detection for lead shedding, ECG data storage and transmission. Methods Firstly, ECG signal was filtered and amplified by BMD101 chip, and then R-wave peak was obtained by filtering ECG signal again with the processor to obtain the ECG parameters. Finally, the results were displayed, stored and sent by the corresponding module. Results After the hardware and software filtering, the power frequency interference and baseline drift in ECG waveform were filtered out, and the R-wave peak of ECG waveform was extracted by differential threshold method, with an accuracy of 98.57%. Conclusion With the characteristics of small volume, low power consumption, convenient carrying and no restriction in the testing process,the ECG monitor can accurately extract the ECG information of the user and meet the actual needs of the user.