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为了改善换能器的QM值,降低换能器工作时损耗,设计了一种工作在并联谐振频率的压电超声换能器。根据换能器的频率要求,利用换能器的频率方程完成换能器结构尺寸的设计;使用有限元方法对换能器的结构和性能进行了仿真分析;通过实验分析了压电陶瓷晶片关键参数对换能器性能的影响,提出陶瓷晶片匹配原则,为生产高QM值压电换能器提供了参考。
In order to improve the QM value of the transducer and reduce the working loss of the transducer, a piezoelectric ultrasonic transducer operating at the parallel resonant frequency is designed. According to the frequency requirement of the transducer, the transducer’s frequency equation is used to design the transducer’s structure size. The structure and performance of the transducer are simulated by the finite element method. The key points of the piezoelectric ceramic chip The influence of parameters on the performance of the transducer is presented. The matching principle of ceramic wafers is proposed, which provides a reference for the production of high QM piezoelectric transducers.