A Comparison of Two Configurations for a Dual-Resonance Cymbal Transducer
A Comparison of Two Configurations for a Dual-Resonance Cymbal Transducer
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DOI：
10.1109/tuffc.2018.2793310
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发表时间：
2018-03-01
影响因子：
3.6
通讯作者：
Lucas, Margaret
中科院分区：
文献类型：
--
作者：
Feeney, Andrew;Lucas, Margaret
设计可以在两个不同频率下以相同模式操作的调谐超声装置的能力具有有益于一系列应用的潜力，例如外科切割手术，其中可以通过切换操作频率来增强穿过软组织然后硬组织的穿透。Cymbal换能器最近已被适配成以单频率操作的原型超声外科切割装置。在本文中，两种不同的配置方法的双谐振钹换能器的详细说明。第一种方法依赖于使用不同金属的两个端盖的换能器制造，从而形成双谐振换能器。第二种采用由形状记忆合金、超弹性镍钛诺组成的传感器端盖。镍钛诺换能器的谐振频率取决于材料的相微结构，可通过镍钛诺端盖的温度或应力依赖性进行切换。通过电阻抗测量和激光多普勒测振仪测量每个换能器的振动响应，并使用有限元分析来显示换能器模态响应对制造工艺的敏感性。本文设计了两种可行的双谐振钹换能器，并对其进行了表征和比较，以说明两种不同方法的优缺点。
The ability to design tuned ultrasonic devices that can be operated in the same mode at two different frequencies has the potential to benefit a range of applications, such as surgical cutting procedures where the penetration through soft then hard tissues could be enhanced by switching the operating frequency. The cymbal transducer has recently been adapted to form a prototype ultrasonic surgical cutting device that operates at a single frequency. In this paper, two different methods of configuring a dual-resonance cymbal transducer are detailed. The first approach relies on transducer fabrication using different metals for the two endcaps, thereby forming a dual-resonance transducer. The second employs transducer endcaps composed from a shape memory alloy, superelastic Nitinol. The resonance frequency of the Nitinol transducer depends on the phase microstructure of the material, switchable through the temperature or stress dependence of the Nitinol endcaps. The vibration response of each transducer is measured through electrical impedance measurements and laser Doppler vibrometry, and finite-element analysis is used to show the sensitivity of transducer modal response to the fabrication processes. Through this paper, two viable dual-resonance cymbal transducers are designed and characterized and compared to illustrate the advantages and disadvantages of the two different approaches.