利用连续波多普勒雷达估计生理亚毫米级位移。

Estimation of physiological sub-millimeter displacement with CW Doppler radar.

作者信息

Padasdao Bryson E, Boric-Lubecke Olga

出版信息

Annu Int Conf IEEE Eng Med Biol Soc. 2015;2015:7602-5. doi: 10.1109/EMBC.2015.7320152.

DOI:10.1109/EMBC.2015.7320152

Abstract

Doppler radar physiological sensing has been studied for non-contact detection of vital signs including respiratory and heartbeat rates. This paper presents the first micrometer resolution Wi-Fi band Doppler radar for sub-millimeter physiological displacement measurement. A continuous-wave Doppler radar working at 2.4GHz is used for the measurement. It is intended for estimating small displacements on the body surface resulting from physiological activity. A mechanical mover was used as target, and programmed to conduct sinusoidal motions to simulate pulse motions. Measured displacements were compared with a reference system, which indicates a superior performance in accuracy for having absolute errors less than 10μm, and relative errors below 4%. It indicates the feasibility of highly accurate non-contact monitoring of physiological movements using Doppler radar.

摘要

多普勒雷达生理传感技术已被用于对包括呼吸和心率在内的生命体征进行非接触式检测。本文介绍了首款用于亚毫米级生理位移测量的具有微米级分辨率的Wi-Fi频段多普勒雷达。采用了工作在2.4GHz的连续波多普勒雷达进行测量。其目的是估计由生理活动引起的体表微小位移。使用一个机械移动器作为目标，并对其进行编程以进行正弦运动来模拟脉搏运动。将测量得到的位移与一个参考系统进行比较，结果表明该雷达具有卓越的性能，绝对误差小于10μm，相对误差低于4%。这表明使用多普勒雷达对生理运动进行高精度非接触监测是可行的。