Design And Application Of Wearable Electret Capacitor Pulse Meter Based On Visible Diagnosis Of Pulse

Objective In the background of the rapid development of mobile Internet and Internet of Things,designing a kind of wearable pulse instrument,which can collect the information of human pulseConveniently and quickly, and finding the method of detecting common abnormalhuman pulse.MethodsMaking of wristband wearable pulse sensor by using the electret capacitor as the core components.The pulse of the vibrationlead tothe distancebetween thetwo plates of the electret capacitance change,thereby changing the capacitance.enlarged by the field effect tube, we can output signals and get the information of human pulse.Then we can complete filtering, amplification, A/Dconversionprocesswith the help of computer audio card device.Based on the normal pulse acquisition test, we can complete time domain analysis and Frequency domain analysis through software, getting the pulse waveform showed regular changes of the map.Break the waveformdown and get the data of each part. Based on a certain number ofabnormalhuman pulse, using statistical methods to find out the differences and flat veins, so as to find out the characteristics of vein disease.This paper complete detection and analysis of the normal pulse and common abnormalhuman pulse such as Xianmai, Chimai andShuomai.ResultsI’ve collected the pulse wave in human by the wearable pulse instrument. The rate of Chimai is less than60times perminute. The rate of Shuomai is more than100times perminute, and ΔT<0.12s as well. The parameter of U2is related positively age in the condition of Xianmai. U2raised with the increase of age,Systolic blood pressure is related positively the parameters of U3and D3. U3and D3are raised with the increase of systolic blood pressure.Conclusion The pulse instrument can collect human pulse information, and through the parameters of pulse parameters to find the characteristic ofnormal pulseand commonabnormalhuman pulse.