彎曲伸張型超音波傳感器之設計與分析

本研究的目的是要開發製作一個適合於水或空氣介質中進行超音波傳送與接收的傳感器。在過去的研究中，已經有文獻將彎曲伸張型超音波傳感器的組成結構分類為Class I到Class V等五種。經過檢討之後，我們發現其中的Class IV和Class V型傳感器結構特性較適合於我們的應用需求。為了降低開發成本，在實際製作之前，我們先利用有限元素分析軟體ANSYS，對彎曲伸張型超音波傳感器進行結構的阻抗分析與位移頻率響應，並且探討彎曲伸張型傳感器的尺寸參數與傳感器特性之間的關係。在Class IV傳感器的分析中，我們提出一種新型的半橢圓環型傳感器進行檢討，並利用有限元素軟體的模擬分析結果，比較半橢圓環型傳感器的尺寸參數與其共振頻率和位移量的關係。而在Class V彎曲伸張型傳感器的分析中，我們檢討了月牙型、鈸型和球－鈸型傳感器等三種結構特性，並將這三種傳感器置於相同條件下，根據其阻抗分析和位移頻率響應的模擬結果，比較這三種傳感器的優缺點。最後，在本文中也比較了半橢圓環型和鈸型傳導器的阻抗特性和位移頻率響應，在相同元件尺寸時，這兩種類傳感器各別的特性與優勢。

關鍵字

彎曲伸張型傳感器；鈸型傳感器；振動分析

並列摘要

The objective of this paper is to develop a flextensional ultrasonic transducer, which is suitable to be used in the water or air medium as a transceiver. In the literature, there were some papers studied the flextensional transducers and divided the transducers from Class I to Class V. Among these transducers, we found that Class IV and Class V are suitable for our application. Therefore, the finite element software ANSYS are used in this study to analyze the structure of the transducer for the design of the flextensional transducers. The impedance analysis and displacement response of the transducers were conducted. In addition, the relations between the characteristics of the flextensional transducers and the design parameters were discussed.A semi-elliptical transducer was developed and analyzed in the Class IV transducers and three types of Class V transducers were analyzed. The cymbal transducer was compared with the semi-elliptical transducer. The characteristics of Class IV and Class V transducers were discussed in this paper.

並列關鍵字

Flextensional transducer ； Cymbal transducer ； Vibration analysis

國際替代計量

彎曲伸張型超音波傳感器之設計與分析

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