不同身体姿势对雷达式生命体征监测系统的影响  

Effect of Different Body Posture on the Bio-radar Signal Monitoring System

作　　者：张华[1] 祁富贵 王帅杰[1] 李钊[1] 路国华[1] 王健琪[1] 

机构地区：[1]第四军医大学生物医学工程学院,陕西西安710032

出　　处：《中国医疗设备》2017年第6期28-31,共4页China Medical Devices

基　　金：国家科技支撑计划(2014BAK12B01)

摘　　要：目的研究在生物雷达监护系统中,不同的身体姿势对雷达回波信号提取生命体征参数的影响。方法设计实验采用监护过程中最常见的平躺和坐姿两种姿势,研究上述姿势的生物雷达回波信号分析方法,提出改进自适应对消滤波算法。结果两种姿势下,自适应抵消器输出滤波信号的中心频率与同步监测的心跳信号频率一致,且位于该点的信号能量最强。结论运用改进的自适应对消滤波算法能够在不同的姿势状态下,得到有效的生命体征参数呼吸和心跳信号。Objective The present study was to perform research on the effect of different body posture on the radar echo signal to extract the vital signs parameters in the biological radar monitoring system. Methods The most common two positions lie on your back and sit were taken as the posture in the monitoring processing. The pose of radar echo signal analysis method was studied, and an improved adaptive cancellation filter algorithm was put forward. Results The center of the adaptive canceller output fltering signal frequency and synchronous monitoring heartbeat signal frequency was consistent under these two postures, and the strongest signal energy point was located in the center of the adaptive canceller output. Conclusion Effective vital signs parameters of breathing and heartbeat signals could be gained via using the improved adaptive cancellation flter algorithm under different postures.

关 键 词：生物雷达 自适应对消 身体姿势 回波信号 监测系统 

分 类 号：TN959[电子电信—信号与信息处理]