压电换能器阻抗匹配技术研究  

Study of impedance matching technology for piezoelectric transducer

作　　者：潘仲明[1] 祝琴[1] 

机构地区：[1]国防科技大学机电工程与自动化学院仪器系,长沙410073

出　　处：《应用声学》2007年第6期357-361,共5页Journal of Applied Acoustics

摘　　要：超声测距传感器是由压电换能器及其收、发电路所组成的,其中压电换能器的阻抗特性直接影响着超声测距传感器的性能。为提高超声波回波信号的强度,扩大超声测距传感器的作用距离,对压电换能器的阻抗特性进行了分析与测试,设计了压电换能器的阻抗匹配电路,并进行了实验验证.Ultrasonic range-finding sensors usually consist of piezoelectric transducers and transmltting/receiving circuits, and their performances are directly affected by the impedance characteristics of the piezoelectric transducers. For the purpose of getting stronger echoes and extending the effective range-finding distance, the impedance characteristics are analyzed and tested in this paper, and the impedance matching circuit is designed and its functions are testified experimentally.

关 键 词：压电换能器 阻抗匹配 超声测距 

分 类 号：TB552[理学—物理]