- 學位論文
能產生高頻振動及電能之複合式壓電系統於熱電療應用之設計
Design of A Piezo-driven System Producing High-Frequency Vibration and Electric Power for both Diathermy and Electrotherapy Application
摘要
本文目標為利用新型之壓電元件系統開發一套可持式、低功耗、同時具電刺激與超音波熱療複合效果的壓電式物理治療設備。此系統為利用壓電元件組合之二階段系統，可同時於應用端產生高頻振動與電能輸出。第一階段之壓電元件作為致動器，經電源驅動產生高頻機械振動經設計之輸出端面輸出於接觸治療區域，並透過超音波變幅桿機構傳輸部份振動能至第二階段之壓電元件。第二階段之壓電元件做為發電器接收從第一階段致動器產生振動能的一部分，利用正壓電效應原理產生電能並輸出於接觸治療區域，致動器所產生之能量，除完成超音波熱療應用之輸出，發電器接受部分能量經過系統設計可完成電刺激應用輸出，具有再生能源的含義。緣此，將同時產生之振動能與電能兩種能量透過輸出端面導入接觸治療區域，提供超音波熱療與電刺激療雙重效果之醫療保健功用。 研究內容主要包括系統之新型壓電元件與機構數模建立與設計分析、新型壓電元件系統驅動控制器之設計分析、壓電元件系統振動模態分析、壓電元件系統獵能分析以及新型壓電元件系統性能測試。本研究是以壓電式物理治療為應用範例，針對電刺激療及超音波熱療分析，驗證系統之可行性及功能性，並實驗驗證其效果可達預期目標。以目前研製之系統輸入30W，電刺激輸出0.6W，超音波熱療輸出達0.29W⁄〖cm〗^2 ，滿足物理治療應用規格，且總消耗功率低於分別使用兩獨立傳統儀器。
並列摘要
Design a low power consumption and a portable piezo-driven physical therapy device that provides both electrotherapy and ultrasonic diathermy is investigated in this article. A composite piezoelectric-driven system constructed with two sets of piezoelectric ceramics connected in a series can produce both high frequency mechanical vibration and electric power at the output end, different from the traditional ultrasonic diathermy and electrotherapy systems that are built with their own specific method and independent structure, the developed composite piezoelectric system can achieve both functions alone. The first set of ceramics is used as an actuator, which is driven by the power source to generate a high-frequency vibration. Part of the vibration energy is transferred to the target contact area via the output head, part of the energy transferred to the second piezoelectric element via a designed horn-type amplification structure. The received vibration energy onto the second set of ceramics can produce electricity on the output side via piezoelectric direct effect, which is a form of renewable energy. Thereby, concurrently generated vibration and electric energy to the output head on the target contact area can be simultaneously used for both the ultrasonic diathermy and the surface electrotherapy. The research topics include system modeling and analysis and design, implementation of the prototyped application apparatus, piezoelectric ceramic actuator design, piezoelectric driver design, system testing and evaluation. In this article, surface electrotherapy and ultrasonic diathermy are built to investigate its function. Through the experiment, the proposed system is verified to be able to achieve the target. With the prototype design while input 30W, electrical output about 0.6W and mechanical output about 0.29W⁄〖cm〗^2 can satisfy both the application requirement of electrotherapy and ultrasonic diathermy, and the power expanse is less than that of using two independent traditional devices.