Development of a high-power testing system for piezoelectric ceramic material

Abstract

Abstract Traditionally, the testing of piezoelectric material loss occurs under low-power conditions, limiting the accurate assessment of the high-power mechanical quality factor. To address this limitation, this study proposes a high-power testing method and device for evaluating the performance of piezoelectric ceramics in practical applications. This method involves determining the resonant frequency of the sample and applying that specific frequency to drive it. The laser doppler vibrometer collects the displacement signal of the sample vibration. Subsequently, the oscilloscope records the current signal, and the data is analyzed using a terminal device to assess the high-power characteristics of the sample. To simulate a high vibration speed working environment, an applied voltage induces vibration on the sample’s surface until the maximum vibration speed is reached, at which point it is short-circuited. This method is capable of analyzing the high-power characteristics of piezoelectric ceramic materials, facilitating a further assessment of the variation of their mechanical quality factor under high-power conditions as a function of vibration velocity.