摘要
针对固体板无损检测过程中超声兰姆波的多模态特性问题,设计并制作了一种可激发和接收单一超声兰姆波模式的新型超声兰姆波换能器。它由铜质叉指电极、导线、绝缘薄膜和YZ铌酸锂晶体等装配而成。采用矢量叠加法计算了叉指电极、YZ铌酸锂晶体相关参数,并将设计的叉指换能器应用于铝板的超声兰姆波检测实验中。实验结果表明,利用所设计的叉指超声兰姆波换能器,可有效克服兰姆波频散和多模式的特性、实现特定频率下单一模态超声兰姆波信号的激发与接收。
For the multi-modal characteristics of ultrasonic lamb waves in nondestructive testing, a new type of ultrasonic Lamb wave transducer that can generate and detect the single mode ultrasonic lamb wave signal is designed and fabricated. It consists of copper interdigital electrodes, wires, insulated film and YZ-LiNbO3 crystal. Using vector sum method, the related parameters of the interdigital electrodes and YZ-LiNbO3 crystal are calculated. And then the new type of ultrasonic Lamb wave transducer is used to experimentally generate and detect the single mode ultrasonic lamb wave in an aluminum plate. Test results show that using the Lamb wave transducer proposed can overcome the dispersion and multi-mode characteristics effectively, and achieve the generation and detection of a single mode ultrasonic lamb wave signal.
作者
刘畅
高广健
陈瀚
邓明晰
LIU Chang;GAO Guangjian;CHEN Han;DENG Mingxi(Department qf Physics,Army Logistics University of PLA,Chongqing 401331,China)
出处
《电子器件》
CAS
北大核心
2021年第2期268-271,共4页
Chinese Journal of Electron Devices
基金
国家自然科学基金项目(11704410)。
关键词
叉指换能器
超声兰姆波
单一模态
interdigital transducer
ultrasonic lamb wave
single mode
