摘要
针对生命体检测技术中呼吸频率检测问题进行了研究,提出了利用超宽带步进变频雷达对生命体在一维距离域上成像的同时检测其呼吸频率的方法。该方法首先利用步进频率的回波数据得到目标的一维距离像,然后在一维距离像中目标信号两边作滤波,滤波后可将微弱的呼吸频率从噪声中提取出来,实现检测生命体呼吸频率的目的。该方法可将载有呼吸频率信号的目标一维像从距离域中截取出来,使得人体微动以及其他距离域上的干扰频率被抑制掉,提高了回波信号的信噪比。
Respiratory rate detection in life detection technology is studied in this paper. A method, which obtains the image of the target in one-dimensional distance domain and at the same time detects the respiratory rate of the hu- man body, is proposed based on UWB stepped frequency radar. In this method, the one-dimensional distance do- main image is obtained from the echo data of the stepped-frequency firstly, and then filtering is carried out at both sides of the target signal in the one-dimensional distance domain image. Weak respiratory rate can be extracted from the noise after filtering. The purpose of detecting the respiratory rate of the human life is achieved. This method could extract the one-dimensional image of the target with respiratory rate signal from the distance domain; and the micro motion of human body and other interference frequencies in distance domain can be suppressed, which im- proves the signal to noise ratio of the echo signal
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2012年第2期286-292,共7页
Chinese Journal of Scientific Instrument
基金
辽宁省教育厅创新团队项目(2009T074)资助
关键词
超宽带
步进变频雷达
一维成像
呼吸检测
距离域滤波
UWB
stepped frequency radar
one-dimensional imaging
respiratory detection
distance domain filtering
