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摘要: 详细介绍了PVDF压力传感器的设计方法和2个等效测量电路。利用SHPB系统对PVDF压力 传感器的动态灵敏度进行了标定,结果显示,不同并联电阻对于PVDF压力传感器动态灵敏度的影响不大, 但对脉冲推力上升时间的测量结果有影响,选择较小的并联电阻可以获得更逼真的测试信号。Abstract: Apolyvinylidenefluoride(PVDF)pressuresensorwasdesignedandtwoequivalentmeasurementcircuitswereintroduced. ThedynamicsensitivityofthePVDFpressuresensorwascalibrated byusingasplitHopkinsonpressurebarsystem.Resultsshowsthatthedynamicsensitivitycoefficientshaveonlysmalldiscrepancyinthecasesofdifferentparallelresistancesandallthecali ration resultsareveryclosetothatgivenbymanufacture.Butthelargertheparallelresistance,thelonger therisetimeofthepulsedthrustgainedbythetestsystem.Obviously,selectingsmallerparallelresistancesisaneffectivewaytoobtainmoreauthenticsignals.
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