用于FRP固化在線監(jiān)測的光纖微彎壓力傳感器

無論在軍事還是航空航天領(lǐng)域, 光纖傳感器都是一種極具應(yīng)用前景的智能化監(jiān)測手段。目前, 將光纖傳感器用于纖維增強(qiáng)樹脂基復(fù)合材料固化過程的監(jiān)測的研究是一個熱點(diǎn)。但由于大多數(shù)光纖傳感器監(jiān)測固化過程成本較高, 所以還沒有被廣泛的應(yīng)用于實(shí)際生產(chǎn)當(dāng)中。開發(fā)了一種新型的低成本、高靈敏度、易操作的光纖傳感器用于纖維增強(qiáng)樹脂基復(fù)合材料固化過程的在線監(jiān)測。光纖傳感器的設(shè)計(jì)基于光纖微彎損耗原理, 其監(jiān)測的直接目標(biāo)
參量為增強(qiáng)纖維所構(gòu)成的網(wǎng)絡(luò)所承擔(dān)的壓力變化, 可以進(jìn)而通過Gutow sk i 的樹脂流動?纖維變形理論間接得出對于固化過程中的幾個關(guān)鍵參量。給出了這種壓力傳感器的設(shè)計(jì)制作方法, 測定該種傳感器在靜態(tài)和動態(tài)下的壓力2光損耗響應(yīng)曲線, 分析了該傳感器對環(huán)境溫度與折射率變化的響應(yīng)。完成了利用微彎壓力傳感器進(jìn)行纖維增強(qiáng)復(fù)合材料在熱壓釜中固化成型過程的在線監(jiān)測實(shí)驗(yàn), 獲得了良好的結(jié)果。
關(guān)鍵詞: 　光纖傳感器; 微彎; 復(fù)合材料; 固化
Abstract: 　F iber op t ic sen so r has been p roved a very p rom isingmon ito ringm ethod in m any f ields such as arm s and aero space indu st ry. O ne of it s mo st popu lar app licat ion s is the cu re p rocess mon ito ring of advanced f iber reinfo rced resin m at rix compo site. Them ain ob stacle ofw ide u t iliza2 t ion of th is techn ique is the h igh co st and comp lex modu lat ion techno logy. A novel f iber op t ic sen so r w as developed, w h ich has the featu re of h igh sen sit ivity and low co st and is easy to han2 dle, to do the job. The f iber op t ic sen so r is developed based on f iber op t ic m icrobend lo sses and aim ed to mon ito r the p ressu re variat ion, th rough w h ich key info rm at ion to the cu re can be ob2 tained th rough compu tat ion direct ly o r indirect ly, on the reinfo rced f iber netwo rk du ring the cu re p rocess. In th is p resen tat ion, the design and p reparat ion of the sen so r is given. The dynam ic and
stat ic respon se of the f iber op t ic p ressu re sen so r under p ressu re is tested. The inf luence of the temperatu re and ref ract ive index variat ion around the sen so r on the respon se of the sen so r’s sig2 nal at tenuat ion is dicu ssed. O n the basis of the f iber op t ic p ressu re sen so r, a po rtab le in st rum en t is in tegarted, w h ich includes laser diode, detecto r, A ?D , etc. W ith it in2situ mon ito ring of the cu re p rocess of f iber reinfo rced compo site lam inates is carried ou t and good resu lt is ob tained.
Key words: 　f iber op t ic sen so rs; m icrobend; compo site; cu re