一种新型柔性夹持高频超声换能器设计

Design of a New Type of Flexible Clamping High Frequency Ultrasonic Transducer

为了提升高频超声换能器输出振幅与超声能量的传输效率,该文提出了一种新型柔性夹持高频超声换能器,并基于模块化设计思想,综合机电等效法、四端网络、有限元分析及柔度分析技术,系统建立了此类型高频超声换能器的设计方法,制作了换能器样机,搭建了换能器电学、动力学特性测试平台。激振实验表明,柔性夹持换能器输出端稳态振幅较传统夹持换能器提升了38.55%。换能器输出端动态振幅信号时域、频域分析结果表明,将柔性铰链机构和传统法兰夹持结构相结合,通过引入柔性转动副,柔性夹持换能器超声能量传递效率提高了5.16%。这表明柔性夹持法兰能够提升夹持结构的运动解耦能力,具有一定的应用前景。

To enhance the vibration amplitude output and the ultrasonic energy delivery efficiency of the high-frequency ultrasonic transducer,a new type of flexible clamping high frequency ultrasonic transducer was proposed.Based on the modular design method,a systematic design method for this type of ultrasonic transducer was developed by combining the electromechanical equivalent method,four-terminal network,finite element analysis,and flexibility analysis.Then,a prototype was fabricated and an experimental platform was set up to test its electrical and dynamic properties.The excitation trial shows that the steady-state amplitude at the output end of the flexible clamping transducer is 38.55%higher than that of the traditional clamping transducer.The dynamic amplitude signal analyses in the time-and frequency-domain were carried out and the results show that by combining the flexible hinge-based mechanism with the traditional flange clamping structure and introducing a flexible rotating pair,the ultrasonic energy transfer efficiency of the flexible clamping transducer is improved by 5.16%,indicating that the flexible clamping flange can improve the motion decoupling ability of the clamping structure,presenting a good application prospect.