PVDF is a high performance piezoelectric material which is very suitable for vehicle dynamic weighing.Aiming at the characteristics of PVDF sensor

a new method is presented for analyzing the generation process of the signal

using damped vibration model.The characteristic of the spectrum is given based on the method.A self-designed experimental device is built up and the signal is measured.The result shows that the signal is distributed at high-frequency relative to the low frequency noise which provides a basis for filtering out noise of the system.The characteristic can effectively reduce the complexity of algorithm design and improve the precision of the system.