本文選題：光纖布拉格光柵 + 應(yīng)變傳感��； 參考：《重慶大學(xué)》2016年博士論文

【摘要】：光纖布拉格光柵(Fiber Bragg Grating,FBG)應(yīng)變傳感系統(tǒng)因其獨(dú)特的優(yōu)勢(shì),已在各行各業(yè)獲得了廣泛的應(yīng)用。但在實(shí)際應(yīng)用中,傳感系統(tǒng)會(huì)出現(xiàn)不同程度的性能退化、進(jìn)而產(chǎn)生各種類(lèi)型的故障,嚴(yán)重影響其推廣效果。這使得系統(tǒng)的可靠性成為了用戶(hù)最關(guān)注并亟待解決的共性難題。但因其牽涉面廣、技術(shù)難度高,且耗時(shí)費(fèi)力、極難在理論上取得突破,因而難以受到研究人員足夠的重視,是光纖傳感研究領(lǐng)域最薄弱的環(huán)節(jié)。要在FBG應(yīng)變傳感系統(tǒng)可靠性研究上取得突破,就必須從傳感器和解調(diào)儀這兩個(gè)關(guān)鍵環(huán)節(jié)入手,從傳感器與信號(hào)解調(diào)的基本原理出發(fā),深入研究FBG傳感元件在各種惡劣環(huán)境中的性能變化規(guī)律,研究傳感器封裝與安裝的應(yīng)變傳遞特性,研究解調(diào)方法的魯棒性、評(píng)估解調(diào)結(jié)果的可信性。這既能為FBG傳感器的制造企業(yè)提供指導(dǎo),也可以為FBG傳感器的用戶(hù)提供使用幫助,對(duì)促進(jìn)FBG傳感技術(shù)、國(guó)民經(jīng)濟(jì)和國(guó)防事業(yè)的發(fā)展都具有重大的意義。為此,本文從FBG傳感元件、應(yīng)變傳遞和傳感解調(diào)三大方面開(kāi)展了深入研究,主要的研究?jī)?nèi)容如下:(1)為了提供研究FBG可靠性基本的理論與方法,總結(jié)分析了FBG結(jié)構(gòu)的形成機(jī)理,提出了從光化學(xué)反應(yīng)角度理解FBG折射率變化的思想;基于耦合模理論和傳輸矩陣法,推導(dǎo)了FBG光譜的仿真方法;總結(jié)分析了FBG光譜特征指標(biāo)。(2)全面探索了FBG傳感元件在力學(xué)、溫度、和輻照環(huán)境中的性能變化規(guī)律。針對(duì)軸向、橫向作用力對(duì)FBG傳感特性影響研究歸納不全面的問(wèn)題,分別推導(dǎo)了軸向、橫向受力對(duì)FBG光譜的影響模型,仿真了分析軸向、橫向作用力對(duì)FBG光譜影響的規(guī)律,并提出了確保FBG可靠傳感的許用條件。針對(duì)彎曲對(duì)FBG傳感特性影響機(jī)理不明確的問(wèn)題,建立了彎曲對(duì)FBG光譜的影響模型,并結(jié)合此模型給出了確保FBG可靠傳感的彎曲條件。針對(duì)長(zhǎng)期作用力下FBG光譜惡化機(jī)理與規(guī)律不明確的問(wèn)題,通過(guò)理論分析和實(shí)驗(yàn)得出了長(zhǎng)期作用力下FBG光譜的惡化機(jī)理及惡化規(guī)律。針對(duì)溫度使用壽命不明確的問(wèn)題,建立了FBG溫度壽命預(yù)測(cè)模型,并結(jié)合高溫加速老化實(shí)驗(yàn),低溫持續(xù)實(shí)驗(yàn)和高低溫沖擊實(shí)驗(yàn)預(yù)測(cè)了FBG在常規(guī)應(yīng)用溫度環(huán)境(-40~80℃)下的壽命。針對(duì)輻照影響機(jī)理不明確的問(wèn)題,建立了輻照對(duì)FBG光譜的影響模型,利用該模型揭示了輻照實(shí)驗(yàn)中出現(xiàn)Bragg波長(zhǎng)漂移差異性的機(jī)理。(3)為了全面探討FBG應(yīng)變傳感器的應(yīng)變傳遞特性,建立了廣義的應(yīng)變傳遞模型,統(tǒng)一了目前形式各異的應(yīng)變傳遞模型。針對(duì)目前應(yīng)變傳遞特性研究存在的局限性,全面分析了粘接層對(duì)平均應(yīng)變傳遞效率和FBG光譜的影響。在平均應(yīng)變傳遞效率方面,基于FBG應(yīng)變傳遞簡(jiǎn)化模型推導(dǎo)了四種FBG應(yīng)變傳遞形式的平均應(yīng)變傳遞效率,然后具體分析了粘接層材料特性和幾何特征對(duì)FBG平均應(yīng)變傳遞效率的穩(wěn)定性和一致性的影響,并給出了解決穩(wěn)定性和一致性的方法。在FBG光譜受粘接層的影響方面,建立了粘接層橫向應(yīng)力對(duì)FBG光譜的影響模型,通過(guò)仿真及實(shí)驗(yàn)探究了其影響規(guī)律,并給出避免FBG光譜因其發(fā)生畸變的方法。另外,從理論和實(shí)驗(yàn)上探討了粘接層惡化對(duì)光譜信號(hào)的影響機(jī)理與規(guī)律。(4)為了優(yōu)化FBG解調(diào)軟件的解調(diào)算法、提升其魯棒性,從傳感系統(tǒng)的實(shí)際情況出發(fā),建立了FBG測(cè)量光譜的惡化模型,更加全面地刻畫(huà)了由FBG傳感器惡化形成的光譜畸變、FBG傳感系統(tǒng)引入的干涉噪聲、基線(xiàn)噪聲和高斯噪聲。在此基礎(chǔ)上,分析了光譜噪聲對(duì)目前有代表性的解調(diào)算法的影響,并相應(yīng)地提出了提高解調(diào)算法魯棒性的改進(jìn)方案。最后通過(guò)分析光譜畸變對(duì)解調(diào)算法的影響,發(fā)現(xiàn)了利用光譜的黃金邊模抑制比進(jìn)行解調(diào)結(jié)果可信性評(píng)估的方法,并通過(guò)實(shí)驗(yàn)證實(shí)了方法的有效性,這解決了目前在實(shí)際應(yīng)用中無(wú)法得知解調(diào)結(jié)果是否可信的難題;同時(shí)也發(fā)現(xiàn)魯棒性相對(duì)較高的是改進(jìn)的相關(guān)算法和改進(jìn)的直接尋峰解法,為用戶(hù)提供了解調(diào)算法選用的參考。
[Abstract]:Optical fiber Prague grating (Fiber Bragg Grating, FBG) strain sensing system has been widely used in all walks of life for its unique advantages, but in practical applications, the sensing system will have different degrees of performance degradation, and then produce various types of failures, which seriously affect the effect of its popularization. This makes the system reliability. However, it is difficult to make a breakthrough in theory because of its wide involvement, high technical difficulty and time-consuming and laborious, so it is difficult to get enough attention by researchers. It is the weakest link in the field of optical fiber sensing research. To make a breakthrough in the reliability research of FBG strain sensing system, it must be from sensing. Starting with the two key links of the demodulator and the demodulator, from the basic principle of sensor and signal demodulation, the performance changes of FBG sensor in various harsh environments are studied, the strain transmission characteristics of the sensor package and installation are studied, the robustness of the demodulation method is studied, and the credibility of the demodulation results is evaluated. This can be transmitted to FBG. The manufacturing enterprises of the sensor provide guidance, and can provide use help for the users of FBG sensors. It is of great significance to promote the FBG sensing technology, the national economy and the development of national defense. This paper has carried out in-depth research on the three aspects of FBG sensing elements, strain transmission and sensing demodulation. The main contents are as follows: (1) The theory and method to study the basic reliability of FBG are provided, the formation mechanism of the FBG structure is summarized and analyzed. The idea of understanding the change of FBG refractive index from the photochemical reaction angle is put forward. Based on the coupled mode theory and the transfer matrix method, the simulation method of the FBG spectrum is derived and the FBG spectral characteristic index is summarized and analyzed. (2) the FBG sensing is fully explored. The influence of the axial and lateral forces on the FBG sensing characteristics is not comprehensive. The influence of axial and transverse force on the FBG spectrum is deduced, and the influence of axial and transverse force on the FBG spectrum is analyzed, and the FBG can be ensured. According to the permissible condition of sensing, in view of the problem that the influence mechanism of bending on the FBG sensing characteristics is not clear, the influence model of the bending on the FBG spectrum is established, and the bending conditions to ensure the reliable sensing of FBG are given in combination with this model. In view of the problem that the mechanism and the law of the FBG spectrum deterioration under the long-term force are not clear, the theoretical analysis and experiments have been made. The deterioration mechanism and deterioration law of FBG spectra under long term force are made. The FBG temperature life prediction model is established for the problem of the uncertain temperature service life. Combined with high temperature accelerated aging experiment, low temperature continuous experiment and high and low temperature impact test, the life of FBG under the conventional temperature environment (-40~80 C) is predicted. The mechanism is not clear, and the effect of irradiation on the FBG spectrum is established. The mechanism of the difference of Bragg wavelength shift in the irradiation experiment is revealed. (3) in order to investigate the strain transfer characteristics of FBG strain sensor, a generalized strain transfer model is established, and the strain transfer model of different forms is unified. The influence of the adhesive layer on the average strain transfer efficiency and the FBG spectrum is analyzed. The average strain transfer efficiency of four FBG strain transfer forms is derived based on the FBG strain transfer simplified model. Then the material characteristics of the adhesive layer are analyzed. And the effect of geometric characteristics on the stability and consistency of FBG average strain transfer efficiency, and a method to solve the stability and consistency is given. In the influence of the FBG spectrum on the adhesive layer, the influence model of the transverse stress on the adhesive layer on the FBG spectrum is established. The influence rules are explored by simulation and experiment, and the cause of avoiding the FBG spectrum is also given. In addition, the mechanism and law of the influence of the adhesive layer deterioration on the spectral signal are discussed theoretically and experimentally. (4) in order to optimize the demodulation algorithm of FBG demodulation software and improve its robustness, the deterioration model of the FBG measurement spectrum is established from the actual situation of the sensing system, and the FBG sensor is depicted more comprehensively. The spectral distortion caused by the deterioration, interference noise, baseline noise and Gauss noise introduced by the FBG sensing system. On this basis, the influence of spectral noise on the present representative demodulation algorithm is analyzed, and an improved scheme for improving the robustness of the demodulation algorithm is proposed. The method to evaluate the credibility of the demodulation results by using the golden edge mode suppression ratio of the spectrum is presented, and the effectiveness of the method is proved by the experiment. This solves the problem that the demodulation results cannot be trusted in the actual application, and the improved correlation algorithm and the improved direct peak seeking are also found. The solution provides users with reference to the algorithm.
【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2016
【分類(lèi)號(hào)】：TP212

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王楚虹;陳偉民;傅志芳;張偉;雷小華;劉顯明;;光纖光柵自動(dòng)化金屬粘接性能[J];光子學(xué)報(bào);2016年08期

2 吳入軍;孫佃亮;;安裝于低模量基體的FBG傳感器誤差分析[J];傳感技術(shù)學(xué)報(bào);2016年06期

3 劉明堯;季冬亮;肖爽;張志建;易仁慧;;膠黏劑黏彈性對(duì)粘貼式FBG應(yīng)變傳遞的影響[J];光學(xué)精密工程;2016年06期

4 萬(wàn)里冰;李凱旋;;FBG應(yīng)變傳感器的疲勞性能研究[J];傳感器與微系統(tǒng);2015年12期

5 楊桂燕;李路;陳和;陳思穎;張寅超;郭磐;;基于廣義Whittaker平滑器的拉曼光譜基線(xiàn)校正方法[J];中國(guó)激光;2015年09期

6 陳勇;楊凱;劉煥淋;;多峰光纖布拉格光柵傳感信號(hào)的自適應(yīng)尋峰處理[J];中國(guó)激光;2015年08期

7 王花平;周智;王倩;劉婉秋;賈及漢;;光纖傳感器埋入瀝青路面基體的應(yīng)變傳遞誤差[J];光學(xué)精密工程;2015年06期

8 肖淑華;劉小辰;范金娟;王占彬;;鐵錨101膠在粘接結(jié)構(gòu)中的老化機(jī)理[J];材料開(kāi)發(fā)與應(yīng)用;2015年02期

9 李紅;祝連慶;劉鋒;張蔭民;黃強(qiáng)先;;裸光纖光柵表貼結(jié)構(gòu)應(yīng)變傳遞分析與實(shí)驗(yàn)研究[J];儀器儀表學(xué)報(bào);2014年08期

10 王巧妮;楊遠(yuǎn)洪;;基于Steger圖像算法的光纖布拉格光柵尋峰技術(shù)[J];光學(xué)學(xué)報(bào);2014年08期

相關(guān)博士學(xué)位論文 前10條

1 吳俊;基于錨固區(qū)預(yù)植FBG應(yīng)變傳感器的斜拉索索力監(jiān)測(cè)技術(shù)研究[D];重慶大學(xué);2014年

2 王正方;橋隧工程安全監(jiān)測(cè)的光纖光柵傳感理論及關(guān)鍵技術(shù)研究[D];山東大學(xué);2014年

3 羅文蕓;石英光纖材料輻射誘導(dǎo)缺陷的形成機(jī)理研究[D];上海大學(xué);2013年

4 張桂花;表面黏貼式光纖光柵傳感原理及其實(shí)驗(yàn)研究[D];西安科技大學(xué);2013年

5 李杰燕;高低溫環(huán)境下光纖傳感的傳感特性及相關(guān)技術(shù)研究[D];武漢理工大學(xué);2013年

6 張曉麗;光纖結(jié)構(gòu)健康監(jiān)測(cè)系統(tǒng)及其傳感器網(wǎng)絡(luò)可靠性研究[D];南京航空航天大學(xué);2012年

7 沈小燕;光纖光柵應(yīng)變傳感及擴(kuò)大應(yīng)變傳感范圍的技術(shù)研究[D];天津大學(xué);2010年

8 王為;光纖光柵在船舶結(jié)構(gòu)健康監(jiān)測(cè)中的關(guān)鍵技術(shù)研究[D];天津大學(xué);2010年

9 鄧濤;石英玻璃及石英光纖的抗輻射性能研究[D];武漢理工大學(xué);2010年

10 胡順仁;橋梁結(jié)構(gòu)健康監(jiān)測(cè)系統(tǒng)中安全評(píng)價(jià)環(huán)節(jié)的差錯(cuò)控制研究[D];重慶大學(xué);2007年

相關(guān)碩士學(xué)位論文 前4條

1 舒岳階;光纖光柵應(yīng)力疲勞失效特征研究[D];重慶大學(xué);2014年

2 劉慧;膠黏劑封裝FBG應(yīng)變傳感器重復(fù)性、一致性及疲勞性研究[D];武漢理工大學(xué);2014年

3 周麗;光纖應(yīng)變傳遞關(guān)系和FBG傳感器性能蛻化特性的研究[D];南京航空航天大學(xué);2012年

4 楊建華;光纖耦合器制作與光譜特性分析[D];哈爾濱工程大學(xué);2011年

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本文編號(hào)：2031918