夹心式压电陶瓷超声换能器的非线性研究进展

夹心式压电陶瓷超声换能器是目前大功率超声设备中应用最广的一种换能器,其在大功率工作状态下会呈现出明显的非线性特征。综述了夹心式压电陶瓷超声换能器非线性方面的研究进展。首先介绍了国内外在压电陶瓷非线性方面的重要理论及实验研究成果,着重阐述了大功率领域常用的硬压电陶瓷的非线性研究工作,其次对夹心式压电陶瓷超声换能器的结构及工艺所引起的非线性进行了简要分析和论述,最后介绍了夹心式压电陶瓷超声换能器非线性建模方面的研究进展。

Research progress on the nonlinearities of sandwich piezoelectric ceramic ultrasonic transducer

So far the sandwich piezoelectric ceramic ultrasonic transducer is the most widely used transducer in high-power ultrasonic equipment, which, however, will exhibit significant nonlinear characteristics under the high-power state. The research progress on the nonlinearities of sandwich piezoelectric ceramic ultrasonic transducer is reviewed. Some important theoretical results and experimental ones about the nonlinearities of piezoelectric ceramic are firstly summarized, and the research works about hard piezoelectric ceramic, which is commonly used in high-power ultra-sound field, are emphatically introduced. Secondly, the nonlinearities caused by the structure and production process of the sandwich piezoelectric ceramic ultrasonic transducer are briefly analyzed and discussed. The current research status on the nonlinear model of sandwich piezoelectric ceramic transducer is finally introduced.