Research And Development Of Pulse Monitoring Equipment And Systems Based On Flexible Pizoresistive Sensors

With the improvement of people’s living standards,people are increasingly concerned about their health conditions,especially with the gradual growth of our country’s aging population,accurate diagnosis of various chronic diseases has become increasingly important.A large amount of medical information about cardiovascular characteristics can be obtained through the monitored pulse waveform,and thus can achieve the purpose of early cardiovascular disease discovery and early prevention.At the same time,compared to the monitoring of ECG,pulse signal may even reflect some of the ECG diagnostic information that can not be displayed.And through the long-term monitoring of the pulse,effective pathological information can be inferred,so the pulse signal has the significance of continuous monitoring.However,most of the existing pulse monitoring products can only collect pulse signals through intermittent measurement.Through the continuous development of Io T technology,a large number of monitoring systems used in personal health are developing in the direction of miniaturization,networking,simplification of operation,and low cost.By pulse acquisition,wireless transmission,real-time early warning,real-time view of data storage,and combination of the pulse monitoring system can be effectively integrated into personal health monitoring.This paper designs a pulse monitoring device based on a flexible piezoresistive sensor and further applies it to a pulse monitoring system.The prepared three-dimensional carbonized nanofiber network material is used as a sensing material to prepare a flexible piezoresistive sensor.And use the prepared sensor to collect the pulse at the wrist radial artery.The A/D conversion and amplification of the collected pulse signal is realized by the chip HX711,and then the converted data is passed through the single-chip microcomputer STC8G1K08,and then send to STM32F103ZET6 through wireless communication module Si24R1 for further processing.The acquired pulse waveform and pulse rate can be displayed in real time on the TFTLCD display.When the pulse rate is too slow or too fast,the buzzer can be used to give an alarm.At the same time,the collected pulse data can be transmitted via Wi-Fi or 4G,thereby saving the pulse data to the cloud server for storage.Users of the pulse monitoring system can also access the pulse data on the cloud server through the Web terminal.Finally,the experimental results show that the pulse monitoring system designed in this article can work stably as well as well as reliably,and meet the expected requirements.