基于压电薄膜的非接触式人体生理信号监测椅

对人体的心率和呼吸信号进行日常监测有助于人体健康生活管理，该文设计了一种非接触式生理信号监测系统。通过装有聚偏氟乙烯(PVDF)压电薄膜传感器的新型椅子结构感知人体振动产生的微小压力作用，并将振动信号传送给上位机软件；从振动信号中提取心冲击信号与呼吸信号，并通过LabVIEW显示波形变化，可以完成心率和呼吸的实时监测。结果表明，装置监测的心率值与血氧脉搏仪相比,其平均误差为2.013％，平均呼吸率误差为4.88％，具有较好的实用性。

Non contact Human Physiological Signal Monitoring Chair Based on Piezoelectric Film

The daily monitoring of the human heart rate and respiratory signals is helpful for the healthy human life management. A non contact physiological signal monitoring system is designed in this paper. A new chair structure with polyvinylidene fluoride(PVDF) piezoelectric film sensor senses the tiny pressure generated by human vibration, and transmits the vibration signals to the host computer software; then the cardiac shock signal and the breathing signal from the vibration signal are extracted; and display the waveform change is displayed through LabVIEW, thus the real time monitoring of heart rate and breathing can be carried out. The results show that the heart rate value monitored by the device has an average error of 2.013% and an average respiratory rate error of 4.88% compared with that of the pulse oximeter, which has better practicability.