摘要： 为避免运动过程中产生的伪波对心电(ECG)检测的影响,设计一种结合人体加速度的便携式ECG系统。采用心电模拟前端进行心电信号采集,并利用三轴加速度传感器测量人体的加速度,对人体的运动强度进行估计,对于运动强度过大时的心电进行过滤避免产生误判。使用数
字信号处理器对心电信号进行预处理,在QRS波检测中,给出一种改进的自适应差分阈值检测算法,检测结果通过蓝牙协议传给Android手机,实现可视化实时显示。实验结果表明,该系统在运动状态下停止检测的准确率为82.5%,有效避免运动伪波干扰,使用MIT-BIH数据库数据
进行心电测试,QRS波识别率达到98.2%,能够完成实时心电检测以及可视化处理。
关键词:
心电检测,
加速度,
差分阈值,
波形检测,
安卓
Abstract: In order to avoid spurious wave impact to Electrocardigram(ECG) test during sports,the paper designs a ECG detection system with a combination of the acceleration.By using analog front end to acquire the ECG,with the help of the triaxial accelerometer,the system can assess the exercise intensity and filter the signals generated while doing strenuous sports.By using Digital Signal Processor(DSP) to preprocess the ECG,the system raises an optimized adaptive threshold method to detect QRS.The dealt data results are sent to Android mobile phone via Bluetooth and shown on the screen.Experimental results show the accuracy of the system is 82.5% when in motion,and it can avoid Pseudo wave under moving.By using MIT-BIH database signals,the detection rate of QRS can reach 98.2%,and the system can do real-time detection of ECG.
Key words:
Electrocardigram(ECG) detection,
accelerometer,
differential threshold,
wave form detection,
Android system
中图分类号: