基于多普勒雷达传感器的人体体征检测

Detection of human body signs based on Doppler radar sensor

针对非接触式人体体征检测中,由于信号微弱并且存在大量噪声的问题,设计了放大电路和滤波电路,实现对信号的放大、去噪;利用高精度模/数转换器(ADC)进行信号采集,通过MATLAB实现信号的处理;利用得到的电特性反向计算人体的体征信息。对设计的人体体征检测装置进行测试,实验结果表明:检测系统可有效检测单个静止人体的呼吸与心跳,最大有效工作距离为100 cm。

Aiming at the problem of weak signal and noise in non-contact human body sign detection,amplification and filtering circuits are designed to achieve signals amplification and de-noising function.High precision analog to digital converter(ADC)is used to acquire signals,and MATLAB is used to process signals.The obtained electrical characteristics are used to calculate the body signs in reverse.Experimental result shows that the designed human body signs detection device can effectively detect the breathing and heartbeat of a single stationary human body,and the maximum effective working distance is 100 cm.