PVdF压电薄膜脉搏传感器的研制

Design and Implementation of the Three-Point PVdF Piezo-Film Sphygmo-Transducer

主要讨论了能同时感受寸、关、尺三部位脉搏信号的仿生手诊用的PVdF压电薄膜传感器 ,并从新的角度剖析了PVdF和电荷放大器的工作原理。所设计的线性化修正的电荷放大电路和其他信号调理电路 ,又考虑到脉搏波形的整形 ,并专门进行了消噪处理 ,提高了测量的灵敏度 ,有效地抑制了非线性失真。

A kind of three point PVdF has been developed,it can imitate the tradition Chinese clinical pulse diagnosis by measuring three parts “CUN”,“GUAN”,“CHI”of the pulse wave. This paper analyses the principle of the PVdF Piezo Film and electric charge amplifier from a new viewpoint.The system consists of a linearization revisary circuit of the electric charge amplifier and the signal processing circuits,It considers the plastic working of the pulse wave form and suppression of the noise, increases the measure sensitivity,and solves the problem of the pulse wave distortion.