本研究使用20 kHz超音波換能器在水中產生聲空蝕場，並以自製的PVDF壓電感測器陣列量測空蝕場中之瞬間衝擊訊號分佈。感測器陣列係以準分子雷射微加工技術直接在雙面鍍鋁電極之PVDF壓電薄膜上加工製造，陣列中各感測點之面積為0.5mm 。除了微感測器陣列本體外，我們也設計建置了一對一的電壓放大器，並透過多通道訊號擷取系統，將各獨立感測點之訊號，瞬時同步地儲存於個人電腦中，構成一套多點壓力場量測系統。本研究建立了標準空蝕侵蝕實驗中，空蝕場對材料表面之衝擊壓力等相關資訊，未來將可做為建構材料空蝕侵蝕預測模型之基礎。

　　An 20 kHz ultrasonic transducer was utilized to generate acoustic cavitation in water. Distribution of the impact signal induced by cavitation bubble collapse was measured instantaneously using a home-made PVDF piezoelectric sensor array. The sensor array was fabricated directly on a PVDF piezoelectric thin film by an excimer laser micro-machining technique. Each sensing unit of the array was 0.5mm in area and was connected to a voltage amplifier. The output signal of each unit was then sampled simultaneously to a personal computer.
　　In the experiment, the impact signal and other related information in a standard test for cavitation erosion were recorded and can be used to build up a erosion prediction model for material which is under attack of cavitation.

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