本文關(guān)鍵詞： 光纖Bragg光柵(FBG) 微生物燃料電池 溫度和濃度 腐蝕 實時測量　出處：《重慶理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：微生物燃料電池(MFC)作為一種清潔新能源的生產(chǎn)技術(shù),在產(chǎn)生新能源的同時,還能降解環(huán)境中的污水。在其生化反應(yīng)過程中影響微生物產(chǎn)電性能的因素眾多,如:微生物種類、電池結(jié)構(gòu)、溶液酸堿性、基質(zhì)濃度和溫度等。在這些眾多的影響因素中,基質(zhì)的溫度和濃度的影響尤其重要,因為這些參數(shù)具有分布不均、瞬時變動的特點,直接影響著微生物的生長狀況,進而影響電池的產(chǎn)電性能。通過對該參數(shù)的實時測量,可以很好的了解微生物燃料電池的生化反應(yīng)過程,對產(chǎn)電性能的提高具有重要的意義。本文采用一種腐蝕型光纖Bragg光柵(FBG)溫度-濃度傳感器對MFC電池電極界面基質(zhì)溫度和濃度進行實時測量,通過對溫度和濃度同時測量的傳感矩陣方程的數(shù)值分析,能夠有效的解決測量中溫度和濃度的交叉敏感的問題,得到精度較高的溫度和濃度值。本文的研究主要內(nèi)容包括以下幾點:(1)設(shè)計并制作了兩室型微生物燃料電池的反應(yīng)裝置。分析了影響電池產(chǎn)電性能的因素,成功運行的了微生物燃料電池,為后續(xù)的測量提供了實驗基礎(chǔ)。(2)通過對普通光纖Bragg光柵的理論分析,研究了腐蝕型光纖Bragg光柵反射譜與與外部介質(zhì)折射率之間關(guān)系,得到了外部介質(zhì)折射率的變化和光纖光柵傳播模式下有效折射率的函數(shù)關(guān)系。(3)設(shè)計并制作了腐蝕型FBG溫度-濃度傳感器。通過分析傳感器獨特的結(jié)構(gòu),得到了敏感矩陣方程,通過實驗數(shù)據(jù)分析,獲得了具有溫度補償效果的較高靈敏度傳感器。(4)設(shè)計并搭建了溫度和濃度同時測量的實驗系統(tǒng)。利用本文設(shè)計制作的腐蝕型FBG溫度-濃度傳感器通過對蔗糖溶液溫度和濃度的同時測量,實驗證明了,隨著蔗糖溶液的濃度的增加,腐蝕型傳感器的中心波長呈線性漂移,靈敏系數(shù)達到5.42nm/riu。(5)設(shè)計并搭建了微生物燃料電池同時測量基質(zhì)溫度和濃度的實驗系統(tǒng)。通過對敏感矩陣中溫度和折射率系數(shù)的標定,能夠很好的對電池基質(zhì)的溫度和濃度進行實時測量。通過實驗得到基質(zhì)溫度的變化和電壓值的變化呈線正相關(guān)關(guān)系,而濃度呈不同程度的下降趨勢。本文的研究工作可以為微生物燃料電池生化反應(yīng)過程中微觀機理研究提供很好的實驗手段。同時對光纖光柵傳感器向多參數(shù)測量、高靈敏感方向的發(fā)展具有一定的推動作用。
[Abstract]:Microbial fuel cell (MFC), as a clean and new energy production technology, can produce new energy and degrade the sewage in the environment at the same time. There are many factors that affect the electrical performance of microorganism during its biochemical reaction, such as the kind of microorganism. The cell structure, solution acidity and alkalinity, substrate concentration and temperature, etc. Among these many factors, the influence of substrate temperature and concentration is particularly important because of the uneven distribution of these parameters, and the instantaneous variation of these parameters. It has a direct effect on the growth of microorganism, and then affects the electrical performance of the battery. By measuring the parameters in real time, the biochemical reaction process of the microbial fuel cell can be well understood. In this paper, a kind of corroded fiber Bragg grating temperature concentration sensor is used to measure the substrate temperature and concentration at the electrode interface of MFC battery in real time. The cross-sensitivity of temperature and concentration can be effectively solved by the numerical analysis of the sensor matrix equation, which is measured simultaneously by temperature and concentration. The main contents of this paper are as follows: 1) the reaction device of two-compartment microbial fuel cell is designed and fabricated. The factors that affect the electric performance of the cell are analyzed. The successful operation of microbial fuel cell provides the experimental basis for further measurement. Through the theoretical analysis of the ordinary fiber Bragg grating, the relationship between the reflection spectrum of the corroded fiber Bragg grating and the refractive index of the external medium is studied. The change of refractive index of external medium and the functional relation of effective refractive index under the propagation mode of fiber grating are obtained. The corrosion-type FBG temperature-concentration sensor is designed and fabricated. By analyzing the unique structure of the sensor, the sensitivity matrix equation is obtained. Through the analysis of experimental data, A high sensitivity sensor with temperature compensation effect. 4) has been designed and an experimental system for simultaneous measurement of temperature and concentration has been set up. The corroded FBG temperature and concentration sensor designed in this paper is used to measure sucrose solution. The simultaneous measurement of temperature and concentration, The experimental results show that the center wavelength of the corrosion sensor shifts linearly with the increase of the concentration of sucrose solution. A microbiological fuel cell system for simultaneous measurement of substrate temperature and concentration was designed and built. By calibrating the temperature and refractive index coefficient in the sensitivity matrix, It can be used to measure the temperature and concentration of the battery substrate in real time. However, the concentration is decreasing in varying degrees. The research in this paper can provide a good experimental means for the study of microcosmic mechanism in the biochemistry reaction of microbial fuel cell. At the same time, the fiber Bragg grating sensor is measured to multiple parameters. The development of high sensitivity can promote the development of high sensitivity.
【學(xué)位授予單位】：重慶理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TM911.45

【參考文獻】

相關(guān)碩士學(xué)位論文 前1條

1 陳松濤;長周期塑料光纖光柵的傳感特性研究[D];浙江大學(xué);2006年

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本文編號：1552160