基于数字正交的压电材料参数测试系统研究  

Piezoelectric Material Parameters Testing System Based on Digital Quadrature Transformation

作　　者：陈亚波[1] 张洋洋[2] 邵坤[2] 张清风[2] 张光祖[2] 

机构地区：[1]华中科技大学电气与电子工程学院,湖北武汉430074 [2]华中科技大学电子科学与技术系,湖北武汉430074

出　　处：《压电与声光》2011年第5期804-806,共3页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金委员会资助项目(60777043);国家"八六三"基金资助项目(2007AA03Z120)

摘　　要：将数字正交采样法引用到压电测试中,对压电参数的测试方法、正交采样的理论两方面进行了研究,完成系统结构设计并给出了相应的软硬件实现方式,最后计算出机械品质因数和机电耦合系数等压电参数,并对测试结果进行了误差分析。测试结果表明,此方法能测量谐振频率与机械品质因数等压电参数,谐振频率测量误差在1%内,且能在一定范围内准确的记录材料的阻抗变化趋势。Digital quadrature sampling method was introduced to piezoelectric parameters testing system in this paper. Two aspects were studied： piezoelectric parameters testing method and theory of digital quadrature. Then the system designed was completed and gave the corresponding mode of software and hardware. Finally mechanical quality factor and eleetromechanical coupling coefficient could be calculated with error analysis. Testing results showed that this method could accurately measure the resonant frequency, mechanical quality factor and resonance frequency （testing errors within 1 % ）. Additionally this system could accurately record the variation trend of the impedance parameters in a range of frequencies.

关 键 词：压电参数 数字正交 阻抗 数字信号处理(DSP) 

分 类 号：O348.11[理学—固体力学]