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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/10436
Title: | 金薄膜點火器之設計與高G值衝擊測試模擬 Design and High-G Shock test Simulation of Thin-Film Au Igniter |
Authors: | Hsiang-Lien CHENG 鄭翔聯 |
Advisor: | 翁宗賢 |
Keyword: | 衝擊模擬,點火薄膜,LS-DYNA,ANSYS, High-G impact,metal igniting film,LS-DYNA,ANSYS, |
Publication Year : | 2010 |
Degree: | 碩士 |
Abstract: | 不管是民生電子產品或是電火工品,在進行產製前,都須依照使用環境通過不同等級的抗震衝擊的模擬測試,確認產品各部件不會因為工作環境中的衝擊而失效。由於工程技術的演進,電火工品的重要組件電點火頭已經被點火晶片所取代,而點火晶片需與點火頭的電極結合,再與相關的金屬外殼封裝,才可形成功能完整的點火系統,所以思考新的設計,即直接在電點火頭上蒸鍍黃金(Au)薄膜電橋,可直接與點火電路整合,完成點火系統。
與點火晶片相同的需求,在進行產製前,須通過衝擊的實驗測試認證,目的在確認Au薄膜電點火頭各部件是否會因為環境中的衝擊造成失效,然後再設計並且評估所設計的薄膜電橋是否可經由微機電製程實現。 本文以建構數值模型的方法,探討由Kovar合金組成的正負極(中心梢與外殼) ,兩極之間融封玻璃絕緣層的電點火頭結構,在承受高G衝擊模擬時的暫態反應,研究中使用的測試規範是MIL-STD 883E軍規測試規範。 經數值模擬的結果分析得知,整體電點火頭可成功在高達120,000G的強震衝擊下存活,惟填充在點火頭外殼與中心柱間的玻璃部件安全係數雖大於1,但仍小於一般CAE所要求的1.5,本文利用在玻璃下方增加墊片的方式,成功地提高玻璃部件安全係數,增加抗震幅度。 To prevent the components from malfunctions due to impacts in the working environment, all the electronic and electro-explosive devices are demanded to pass impact simulation tests. Owing to technological progresses, traditional electrical igniters have been replaced by ignition-chips. To assemble the whole ignition system, ignition-chips are overlaid on the igniter heads and packaged in the compartment cases. This innovative design is to integrate the ignition circuit by directly coating an Au thin film bridge on the igniter head with vacuum evaporation technique to fabricate the ignition device. Prior to manufacturing, impact tests are usually carried out to validate if this Au thin film bridge can sustain impacts in the working conditions. In this thesis, transient response of the innovative igniter head subject to high-G impact is simulated according to MIL-STD 883E specifications. The simulation results evidence that the igniter head could survive under 120,000 G extremely high impacts. Although the safety factor of the glass part is only slightly larger than 1, it which is still below the common CAE requirement of 1.5. In this thesis, placing a ceramics spacer beneath the filling glass can successfully improve the safety factor of the glass part to over 1.5 that which would effectively enhance the anti-impact capability. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/10436 |
Fulltext Rights: | 同意授權(全球公開) |
Appears in Collections: | 應用力學研究所 |
Files in This Item:
File | Size | Format | |
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ntu-99-1.pdf | 5.47 MB | Adobe PDF | View/Open |
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