本文關(guān)鍵詞： 超聲焊接 光纖光柵 超低溫傳感 溫度靈敏度　出處：《激光與紅外》2017年06期 　論文類型：期刊論文

【摘要】：傳統(tǒng)膠封光纖光柵(Fiber Bragg Grating,FBG)傳感器的膠黏劑在超低溫環(huán)境中存在著板結(jié)、與基體間熱失配等問題。針對膠封光纖光柵傳感器在超低溫條件下進(jìn)行測量的局限性,本文設(shè)計(jì)一種全金屬化封裝結(jié)構(gòu),并采用超聲焊接的方法將光纖光柵封裝固定于特種鋁合金基底表面。在-160~0℃環(huán)境下,對兩支FBG溫度傳感器的超低溫傳感特性進(jìn)行了實(shí)驗(yàn)測試。結(jié)果表明,該封裝形式的FBG傳感器的線性度較好,相關(guān)系數(shù)均在0.99以上。它們的溫度靈敏度系數(shù)在線性變化區(qū)間平均值分別為27.88 pm/℃和26.17 pm/℃,分別是封裝前裸光纖光柵的2.75倍和2.58倍左右,提高了溫度靈敏度。此金屬化封裝的FBG溫度傳感器的工藝簡單,易于實(shí)現(xiàn),可用于超低溫惡劣環(huán)境下的溫度測量。
[Abstract]:The adhesive of the traditional fiber Bragg grating (FBG) sensor is bonded in ultra-low temperature environment. In view of the limitation of the rubber sealed fiber Bragg grating sensor to measure at ultra-low temperature, a kind of all-metallized packaging structure is designed to solve the problem of thermal mismatch between the sensor and the substrate. The fiber Bragg grating package is fixed on the surface of special aluminum alloy substrate by ultrasonic welding. The experimental results of two FBG temperature sensors show that the linearity of the FBG sensor is good. The correlation coefficients are all above 0.99. The average values of their temperature sensitivity coefficients in linear range are 27.88 pm / 鈩，

本文編號(hào)：1454200