本文選題：光纖光柵 + 埋設(shè)深度��； 參考：《南京航空航天大學》2015年碩士論文

【摘要】：隨著道路工程的發(fā)展,光纖光柵傳感技術(shù)以其優(yōu)良的性能,在道路工程得到了一些應(yīng)用嘗試研究,但是受道路工程施工的復雜性、粗放性、惡劣性等因素的制約,目前光纖光柵技術(shù)在道路工程中的實際應(yīng)用還很少。本文針對光纖光柵傳感器的不同埋設(shè)深度對傳感器荷載監(jiān)測靈敏度的影響進行試驗研究。試驗設(shè)計了以鋼材封裝的F型傳感器和以聚丙烯封裝的P型傳感器。本文通過傳感器拉伸標定試驗、靜載以及動荷載埋深試驗,分析了傳感器的封裝、試驗方法、以及埋設(shè)深度對傳感器荷載監(jiān)測靈敏度的影響。試驗結(jié)果表明,兩種傳感器是可行有效的;兩種封裝材料對光纖光柵起到的增敏效果各不相同,兩種傳感器可以適用不同的監(jiān)測要求。通過拉伸標定試驗靈敏度系數(shù)折算,靜載埋深試驗得到了傳感器的靈敏度系數(shù)隨埋深的變化規(guī)律,不同封裝的靜載試驗得到的變化規(guī)律也不同;靜載試驗方法不同,埋設(shè)深度對傳感器靈敏度的影響規(guī)律也不同,說明試驗方法對傳感器的靈敏度有重大影響。動荷載埋深試驗發(fā)現(xiàn),方形靜載標定的試驗結(jié)果可以用于計算車轍儀動載,而圓形靜載標定試驗不能,說明靜載試驗標定方法對動載試驗的驗證計算結(jié)果有重大影響;在靜載和動荷載相等時,傳感器的波長變化量響應(yīng)有一定的偏差;本文提出了用荷載差異系數(shù)來修正動荷載監(jiān)測偏差,并研究了荷載差異系數(shù)與傳感器埋設(shè)深度的關(guān)系,得到了荷載差異系數(shù)與埋深的關(guān)系公式和車輪荷載的實測荷載的計算公式。
[Abstract]:With the development of road engineering, fiber Bragg grating sensing technology has been applied in road engineering with its excellent performance. However, it is restricted by the complexity, extensive and evil of road engineering construction. At present, the practical application of fiber grating technology in road engineering is still few. In this paper, the influence of different embedding depth of fiber grating sensor on the sensitivity of sensor load monitoring is studied. F-type sensors encapsulated in steel and P-type sensors packaged in polypropylene were designed. In this paper, the effects of sensor encapsulation, test method and embedding depth on the sensitivity of sensor load monitoring are analyzed by means of sensor tensile calibration test, static load and dynamic load burying test. The experimental results show that the two kinds of sensors are feasible and effective, and that the two kinds of packaging materials have different sensitizing effects on fiber Bragg gratings, and the two kinds of sensors can be used for different monitoring requirements. Through the conversion of sensitivity coefficient of tensile calibration test, the variation of sensitivity coefficient with buried depth of sensor is obtained by static load burying test, and the variation law of static load test with different package is also different, and the static load test method is different. The influence of embedded depth on sensor sensitivity is also different, which indicates that the test method has great influence on sensor sensitivity. The dynamic load buried depth test shows that the square static load calibration test results can be used to calculate the dynamic load of the rutting instrument, but the circular static load calibration test cannot, which indicates that the static load test calibration method has a significant impact on the dynamic load test verification and calculation results. When the static load and the dynamic load are equal, the response of the wavelength variation of the sensor has a certain deviation, this paper proposes to correct the dynamic load monitoring deviation by the load difference coefficient, and studies the relationship between the load difference coefficient and the depth of the sensor embedding. The relationship between the load difference coefficient and the buried depth and the calculation formula of the measured load of the wheel load are obtained.
【學位授予單位】：南京航空航天大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U416

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本文編號：1922538