基于PVDF的可穿戴生理信号监测系统

Wearable Physiological Signal Monitoring System Based on PVDF

呼吸、心率、鼾声反映了人体在睡眠时的大量信息,该文以聚偏氟乙烯(PVDF)作为敏感单元进行呼吸、脉搏、鼾声信号的监测。根据所采用的传感器特性分别进行了电荷放大电路、陷波电路及电压放大电路的设计。硬件电路通过聚合物锂电池进行供电,根据聚合物电池的特性分别为电池设计了充电电路、保护电路及放电电路,硬件电路整体集成在一块印制电路板(PCB)上。同时设计了基于Android设备的APP,以可视化形式实时显示生理信号数据,并对其进行长期储存,便于后期医生进行睡眠呼吸病症的分析诊断。该研究的目的是能准确监测睡眠生理参数,提高被测试者的使用舒适感。

Breathing,heart rate and snoring can reflect a lot of information of human body during sleep.In this paper,the polyvinylidene fluoride(PVDF)is used as a sensitive unit to monitor the signals of respiration,pulse and snoring.According to the characteristics of the sensor,the charge amplifier circuit,the notch circuit and the voltage amplifier circuit are designed.The hardware circuit is powered by the polymer lithium battery.According to the characteristics of polymer battery,charging circuit,protection circuit and discharge circuit are designed for the battery.The whole hardware circuit is integrated on a PCB.At the same time,the APP based on Android device is designed to display the physiological signal data in real time in the form of visualization,and to store the signal data for a long time,so as to facilitate the analysis and diagnosis of sleep breathing diseases by doctors in the later stage.The purpose of this study is to monitor sleep physiological parameters accurately and improve the comfort of subjects.