压电换能器一致性筛选技术  

Method for consistency screening of the piezoelectric transducer.

作　　者：聂建华[1] 张廷全[1] 沈建国[1] 

机构地区：[1]天津大学电气与自动化工程学院

出　　处：《石油仪器》2009年第6期7-9,12,共4页Petroleum Instruments

摘　　要：研究了压力及温度对压电晶体换能器主频及带宽的影响:压力增加,一个主频裂变成两个主频,带宽增加;温度增加,主频降低,带宽增加。介绍了相关系数法及最大值法两种挑选压电换能器的技术。实验表明:相关系数法与最大值法均可以挑选出相位及幅度一致性好的探头组合。We study the impact of the pressure and temperature on frequency and bandwidth of the piezoelectric transducer, and draw the conclusion that: If the pressure increases, the dominant frequency divides into two main frequencies, and the bandwidth increases as well; If the temperature increases, the dominant frequency reduces, and the bandwidth increases. The maximum screening method and the correlation coefficient screening method are introduced. The experiments show that: the maximum screening method and the correlation coefficient screening method can select a good combinations of piezoelectric transducer with the same phase and range coherence.

关 键 词：压电换能器 主频 带宽 相关系数法 最大值法 

分 类 号：P631.8[天文地球—地质矿产勘探]