压电薄膜传感器及其在心脏监测中的应用  

Piezoelectric-Film Sensor And Its Application In The Heart Monitoring System

作　　者：刘欣[1] 唐振方[1] 

机构地区：[1]暨南大学

出　　处：《传感器世界》2005年第7期13-15,18,共4页Sensor World

摘　　要：介绍了应用有机高分子压电材料聚偏氟乙烯(PVDF)制作的压电传感器和结合电子线路进行的心音监测试验。压电薄膜传感器的设计利用了阻抗变换器,使PVDF膜的高阻抗输出变为低阻抗输出,输出阻抗为3k?左右,并在后续电子线路中设计了高信噪比的放大电路,可对信号进行有效的放大;配合单片机、存储器等芯片技术研制出初步监测心音心电信号的监测系统,能进行心音心电信号数据的采集、传送、处理。实验表明,该薄膜传感器与整机之间结构、性能完全匹配,该心音心电监测系统能够准确监测人体心音心电信号。The design and application of heart monitoring system of PVDF film piezoelectric sensors are presented. With the impedance converter, the piezoelectric film can detects the heart sounds in wide frequency spectrum. The amplifier increases the signals with flat frequency response.Using the detecting system designed with the microprocessor and flash memory, data is transported and recorded automatically. According to our experiment, the system analyzes the data well and truly. It is helpful in monitoring man＇s heart

关 键 词：PVDF压电薄膜 阻抗变换器 心音传感器 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]