Development And Implementation Of Integrated Non-Contact Multi-Channel Vital Signs Monitoring System

In recent years,with the spread of infectious diseases such as the new coronavirus pneumonia,non-contact vital signs monitoring has received more and more attention.With the advantages of low power consumption,high resolution,high penetration and strong anti-interference ability,Ultrawideband radar can well obtain the breathing and heartbeat signs of the measured target;infrared thermal imager can accurately obtain the target temperature information,binocular camera has good target recognition capability and can be integrated into a multi-channel integrated vital sign monitoring system.Simultaneous detection of multiple vital signs information helps to obtain more accurate target vital signs situation.However,there are still many problems in the development of a multichannel integrated vital signs monitoring system:it is difficult to obtain comprehensive information due to the limited line-of-sight of a single radar,the dimensions of ultra-wideband radar and infrared thermal imager are different,and data correlation is difficult;there may be mutual occlusion between targets objects,the signal reception is seriously affected;the environment is complex,high temperature objects,strong reflection objects and other interference are more.This paper studies the above problems.Firstly,this paper introduces the principles of modeling and simulation of human cardiopulmonary motion based on ultra-wideband radar starting from the principles of human vital signs and vital signs monitoring;it further illustrates the principles of fusing video and infrared signals using a three-step approach of feature extraction,fusion strategy and image reconstruction.The second chapter introduces the main function,requirement analysis and detailed design of the multi-channel integrated non-contact vital signs monitoring system.The third section introduces the system as a whole,including the modules used by the system,the front and back ends of the system,and the display of the system’s working conditions.Chapter 4 addresses the interference problems in the multi-channel integrated non-contact vital sign monitoring system,introducing motion interference cancellation algorithm,environmental interference cancellation algorithm,clothing interference cancellation algorithm and temperature measurement algorithm based on temperature difference,face partition temperature measurement algorithm,etc.The fifth chapter conducts multi-person and multi-scenario experiments on the multichannel integrated non-contact vital signs monitoring system,which verifies that the research results in this paper can well perform non-contact multi-target vital signs monitoring and have certain practical value.