基于折射率變化的復(fù)合材料固化在線監(jiān)測研究

先進(jìn)復(fù)合材料的固化成型工藝十分復(fù)雜, 目前在很大程度上仍依賴于經(jīng)驗(yàn)工藝。為了實(shí)現(xiàn)復(fù)合材料固化工藝的透明化、科學(xué)化及智能化, 提出了將光纖折射率傳感器用于復(fù)合材料制造過程, 研制了一種折射率光纖傳感器, 同時(shí)將光源、探測器、信號處理器等元器件集成化為一個(gè)便攜式的光纖傳感儀以利于生產(chǎn)現(xiàn)場使用。利用該傳感器對常溫固化樹脂的固化過程進(jìn)行了測量, 將其與同等條件下邁克爾遜干涉儀對固化過程的監(jiān)測結(jié)果進(jìn)行了比
較, 二者具有良好的一致性。在實(shí)驗(yàn)室與生產(chǎn)現(xiàn)場兩種條件下將光纖折射率傳感器埋設(shè)于預(yù)浸料中對其固化工藝過程進(jìn)行了監(jiān)測。結(jié)果表明, 該技術(shù)不僅可以用于新型樹脂固化工藝制度的確定, 也可用于復(fù)合材料固化工藝過程的在線監(jiān)測。
關(guān)鍵詞: 　光纖傳感器; 折射率; 復(fù)合材料; 固化
Abstract: 　T ill now the p rocessing of advanced compo site is still emp irical due to its comp licated physical and chem ical change. In o rder to transfo rm the p rocessing technique from an emp irical state to a transparent, scientific and intelligent app roach, the idea of monito ring the cure p rocess of the compo site p roductsw ith fiber op tic sensing technique is put fo rth. A fiber op tic refractive senso r w as developed and a po rtable instrument fo r the op tic em is2 sion, signal receiving and interogation w as integrated to meet the requirement of on2site app lication. W ith it the cure p rocess of resin and fiber reinfo rced p rep regs can be monito red. Tests of resin cure p rocess monito ring are carried out w ith bo th the resin that should be cured under room temperature and the resin that should be cured un2 der h igh temperature. The results of tests w ith resin cure under temperature w ere compared w ith the results of M ichelson interferometer tests under sim ilar circum stances, w h ich are in good consistency. Testsw ere also carried out in compo site manufacture, in w h ich the fiber op tic refractive senso rs w ere embedded in the p rep reg during the cure p rocess. It is p roved that w ith th ismethod the key info rmation of the cure p rocess can be extracted out during
the p rocess and can be used in on2line intelligent contro l. In conclusion, th is technique can be used no t only in the establishment of the cure routine but also in the in2situ monito ring and contro l of the compo site manufacture p ro2 cess.
Key words: 　f iber op t ic sen so rs; ref ract ive; compo site; cu re