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Influence of circuit capacitance on impact stress measurement of polyvinylidene fluoride sensor: A quantitative study

MEASUREMENT (2022)

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Influence of shunt capacitance on impact load measurement of polyvinylidene fluoride sensor

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Summary: Shunt capacitance plays a crucial role in the test circuit for charge mode, and its impact on polyvinylidene fluoride (PVDF) impact load measurement is worth discussing. This study conducts experiments by connecting different shunt capacitances and finds that the charge generated not only concentrates on the shunt capacitor, but also on the PVDF capacitor and extra capacitor, depending on the capacitance ratio. The extra capacitance is caused by the parasitic capacitance of the test circuit and the change in PVDF capacitance during impact load, and minimizing their influence is challenging. By analyzing the interference caused by the extra capacitance and comparing suitable measurement conditions, the research in this paper aims to improve the accuracy of PVDF impact load measurement.

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