壓電換能器於外力衝擊時之電氣暫態特性研究

Research of Electrical Transient Responses of a Piezoelectric Transducer Driven by Impact Forces

張國財(Kuo-Tsai Chang) ； 蕭志民(Chih-Min Shiau)

《先進工程學刊》 3卷1期 (2008/01) Pp. 41-48

https://doi.org/10.29948/JAE.200801.0006

摘要

本文探討壓電換能器受到衝擊時之暫態電壓響應及其主要特性。此特性涵蓋暫態期間的最大電壓、最小電壓及峰對峰電壓。首先，說明壓電換能器的結構及原理。其次，說明換能器之等效電路及其參數，以及利用等效電路推導出暫態響應公式。接著，建構衝擊試驗平台以控制衝擊力大小，以及建置資料擷取系統以獲取暫態電壓波形及其相關資訊。最後，依據實驗結果，探討衝擊力大小及測試電阻值對暫態響應特性之影響。

關鍵字

壓電換能器 ； 暫態電壓 ； 衝擊試驗 ； 測試電阻

並列摘要

This study investigates electrical transient responses of a piezoelectric transducer and their major characteristics such as maximum voltage, minimum voltage and peak-to-peak voltage under impact. The structure and principle of the transducer are expressed first. Then, an equivalent circuit and its parameters are stated, and a transient response is derived from the equivalent circuit. Moreover, an impact testing mechanism is built to control the magnitude of an impact force, and a data measuring system is constructed to pick up waveforms of the transient responses and their related information. Finally, effected of magnitudes of impact forces and testing resistances on the transient characteristics are discussed according to the experimental results.

並列關鍵字

piezoelectric transducer ； transient voltage ； impact test ； testing resistance