新型压电驻极体脉搏分析仪

利用多孔压电驻极体薄膜制备压电传感器,贴在手腕上采集脉搏振动的信号,并配上相应的后端电路和显示装置,制造出一种新型的压电驻极体脉搏分析仪。由于采用压电驻极体薄膜作为脉搏传感器的换能器,脉搏分析仪的灵敏度高,失真度低,重复性好。在脉搏分析仪中,采用塑化膜的形式封装压电电极,易引入干扰。采用压电麦克风的封装形式的传感器抗干扰能力强,且场效应晶体管(FET)易集成,成本低,实测的波形图近似于典型心电图波形,具有很大的医疗参考价值。

A New Type of Piezoelectret Pulse Analyzer

Using porous piezoelectret film to fabricated piezoelectric sensor, then put it on wrist to collect pulse vibration signals, and with the corresponding circuit and display device, we fabricated a new type of piezoelectret pulse analyzer. Due to adopting piezoelectret film as the pulse transducer, the pulse analyzer has high sensitivity, low distortion and good repeatability. In the pulse analyzer, the piezoelectric membrane electrode in the form of plasticizing encapsulated is easy to introduce interference. The sensor encapsulate as piezoelectric microphone has the strong ability of anti interference ability, and FET has the advantage of easy integration, lower cost, and the waveform figure measured similar to typical ECG waveform has great medical reference value.