Pulse Signal Detection And Monitoring System Based On Smart Phone

With the aging of the population and the acceleration of the pace of life,some unhealthy eating habits,lifestyles,and greater social life pressure make cardiovascular diseases such as hyperlipidemia,coronary heart disease,angina pectoris,and atherosclerosis become frequently-occurring diseases,and the subject is becoming younger,which seriously threatens people's health,and the prevention of cardiovascular diseases has become an urgent task.Pulse is an important indicator of human life activities,pulse signal is rich in physiological and pathological information,which is closely related to cardiovascular diseases.The accurate measurement and analysis of pulse signals can effectively monitor the health status of the human body,which can achieve early detection and early prevention of cardiovascular diseases.Aiming at the shortcomings of traditional pulse diagnosis devices such as bulky,expensive and inconvenient to carry and the social problem of shortage of medical resources in China,In this paper,we design a pulse signal detection and monitoring system based on smart phone using Bluetooth communication and mobile Internet transmission technology.The system through the smart phone control measurement of human pulse signal,remote transmission to the remote medical center and feedback analysis results,can effectively prevent cardiovascular disease and effective monitoring of physical health.The research results of this article include the following aspects:1.Portable pulse sensor node design.From low power consumption,small size,low cost demand,we designed pulse sensor nodes responsible for measuring pulse signals.The design of the hardware circuit includes the infrared emitter drive circuit,signal amplifier circuit,filter circuit,MCU minimum system,and power management module.The MCU control program includes timer,serial port,AD conversion and other parts,and works under the control of the MCU to complete the pulse signal acquisition.2.Android APP and server-side Web programming.We designed Android smartphone application software based on the current popular Android operating system,which mainly includes user login,Bluetooth communication,data analysis and storage,waveform drawing and network communication and other functional parts.The server-side program uses the Web access method of the B/S network architecture to communicate with the smartphone through the TCP Socket interface,it receive the pulse signal through the mobile Internet and send the analysis result.3.Data processing for pulse signal.Pulse signal is mixed with noise and baseline interference during the acquisition process,which has an adverse effect on the accuracy of the pulse signal measurement and subsequent pulse signal analysis,in this paper we use wavelet transform to denoise the signal and eliminate the baseline.In addition,we designed an algorithm to identify the peak-to-valley feature points of the pulse wave,and use the identified peaks and valleys to calculate the human heart rate.The innovation of this article is to use the current new Android operating system and Java Web network programming technology to design a system based on remote transmission and diagnosis of smart phones and servers,which realize remote measurement of pulse signal,remote transmission and remote feedback of analysis results.The design overcomes the shortcomings of traditional pulse diagnosis devices such as bulky,expensive,need to connect to computers and generally only used in hospitals and other institutions,which provides a new solution for the remote monitoring of human health conditions and the remote diagnosis of cardiovascular diseases.