本文選題：光纖光柵 + 埋設(shè)深度�。� 參考：《南京航空航天大學(xué)》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(fù)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(shí)際應(yīng)用還很少。本文針對(duì)光纖光柵傳感器的不同埋設(shè)深度對(duì)傳感器荷載監(jiān)測(cè)靈敏度的影響進(jìn)行試驗(yàn)研究。試驗(yàn)設(shè)計(jì)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(guò)傳感器拉伸標(biāo)定試驗(yàn)、靜載以及動(dòng)荷載埋深試驗(yàn),分析了傳感器的封裝、試驗(yàn)方法、以及埋設(shè)深度對(duì)傳感器荷載監(jiān)測(cè)靈敏度的影響。試驗(yàn)結(jié)果表明,兩種傳感器是可行有效的;兩種封裝材料對(duì)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(cè)要求。通過(guò)拉伸標(biāo)定試驗(yàn)靈敏度系數(shù)折算,靜載埋深試驗(yàn)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(yàn)得到的變化規(guī)律也不同;靜載試驗(yàn)方法不同,埋設(shè)深度對(duì)傳感器靈敏度的影響規(guī)律也不同,說(shuō)明試驗(yàn)方法對(duì)傳感器的靈敏度有重大影響。動(dòng)荷載埋深試驗(yàn)發(fā)現(xiàn),方形靜載標(biāo)定的試驗(yàn)結(jié)果可以用于計(jì)算車(chē)轍儀動(dòng)載,而圓形靜載標(biāo)定試驗(yàn)不能,說(shuō)明靜載試驗(yàn)標(biāo)定方法對(duì)動(dòng)載試驗(yàn)的驗(yàn)證計(jì)算結(jié)果有重大影響;在靜載和動(dòng)荷載相等時(shí),傳感器的波長(zhǎng)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(lái)修正動(dòng)荷載監(jiān)測(cè)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(chē)輪荷載的實(shí)測(cè)荷載的計(jì)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(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：U416

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本文編號(hào)：1922538