Research On Separation Algorithm Of Respiration And Heart Rate In UWB Bio-radar Vital Signs Detection

In recent years,with the rapid development of science and technology in our country,the demand for vital signs detection in medical,health,earthquake relief and other fields has gradually increased.Ultra-wideband bio-radar technology has gradually become an important means due to its high detection accuracy,strong anti-interference ability and low energy consumption.In this paper,related researches are conducted on the extraction of respiratory and heart rate information in vital signs detection.The main work contents are summarized as follows:According to the problems in vital signs detection,this paper analyzes the advantages of ultra-wideband bio-radar in detecting human vital signs,and studies the relevant theoretical knowledge of ultra-wideband bio-radar.This paper studies an echo signal extraction method based on ultra-wideband bio-radar technology.This article firstly uses the ultra-wideband bio-radar to collect data,and then designs the software in the computer to replay the signals.Finally,this paper judges and extracts the best signal.Though this method,the best signals that conforms to the law of breathing and heart rate movement of the measured human body can be obtained.This paper studies the separation algorithm of human breathing and heart rate signals.The article focuses on the de-noising and separation processing of echo signals.Sym wavelet and four-layer decomposition layer are selected by comparing the performance of various wavelet basis functions,and the signals are decomposed and reconstructed.Finally,this paper combines wavelet threshold de-noising and power spectrum estimation methods to analyze the best signals of the tested human and obtains the breathing and heart rate information.These methods provide more ideas and ways for non-contact vital signs detection.The signals of multiple healthy adults could be extracted through multiple experiments,and the breathing and heart rate of the tested human body are obtained by using the methods in this article.Finally,the experimental results are compared with the standard results to verify the effect of the research methods in this article.