基于光纤光栅应变传感器的管道腐蚀监测研究

发布时间：2018-07-25 09:01

【摘要】：长距离输油输气管道大量建设,覆盖面积更广泛,经过地区气候条件更复杂,对输油输气管道的健康监测要求也更高。结合输油输气管道服役需求和腐蚀破坏特点,以及光纤光栅耐酸碱腐蚀,抗电磁干扰,测量精度高,测量表现稳定,体积小等特点,本文提出一种监测输油输气管道腐蚀的新型光纤光栅传感器——箍式FBG应变测量传感器。第一章,介绍了各国输油输气管道发展状况和我国输油输气管道出现的问题,综述现有各类输油输气管道监测方法。介绍光纤光栅传感技术的基本原理和应用状况,以及光纤光栅传感技术应用于输油输气管道的优势。第二章,详细地介绍了箍式FBG应变测量传感器的封装工艺、安装方法和基本工作原理。将箍式FBG应变测量传感器安装在无缝钢管的外表面进行压力标定试验,循环往复加载试验,重复利用性试验,证明箍式FBG应变测量传感器应用于输油输气管道监测,线性性质良好,工作应能稳定,可重复利用。第三章,介绍箍式FBG应变测量传感器应用于输油输气管道全截面腐蚀监测,进行管道壁厚标定试验,不同的壁厚代表不同程度的全截面腐蚀。试验结果证明箍式FBG应变测量传感器对输油输气管道壁厚变化敏感,能够识别不同程度的全截面腐蚀。第四章,介绍箍式FBG应变测量传感器应用于输油输气管道局部腐蚀监测,试验结果证明箍式FBG应变测量传感器对输油输气管道局部壁厚变化敏感,能够识别局部腐蚀。
[Abstract]:A large number of long-distance oil and gas pipelines have been built, covering a wider area, and the regional climate conditions are more complex, and the health monitoring requirements of oil and gas transmission pipelines are also higher. Combined with the service requirements and corrosion characteristics of oil and gas transmission pipeline, and fiber grating acid-alkali corrosion resistance, anti-electromagnetic interference, high measurement accuracy, measurement performance stability, small volume, etc. In this paper, a new fiber Bragg grating (FBG) sensor, hoop FBG strain measuring sensor, is proposed for monitoring corrosion of oil and gas pipeline. In the first chapter, the development of oil and gas pipelines in various countries and the problems of oil and gas pipelines in China are introduced, and the existing monitoring methods of oil and gas pipelines are summarized. This paper introduces the basic principle and application status of fiber grating sensing technology, and the advantages of fiber grating sensing technology in oil and gas pipeline. In chapter 2, the packaging technology, installation method and basic working principle of hoop FBG strain measuring sensor are introduced in detail. The pressure calibration test, cyclic load test and reusability test are carried out on the outer surface of seamless steel pipe by installing the hoop FBG strain measurement sensor. It is proved that the hoop FBG strain measurement sensor is applied to the monitoring of oil and gas transmission pipeline. The linear property is good, the work should be stable and reusable. In the third chapter, the application of FBG strain sensor in the whole section corrosion monitoring of oil and gas pipeline is introduced, and the wall thickness calibration test is carried out. Different wall thickness represents different degree of total section corrosion. The experimental results show that the hoop FBG strain sensor is sensitive to the variation of the wall thickness of the gas pipeline and can identify the total section corrosion of different degrees. In chapter 4, the application of hoop FBG strain measurement sensor in local corrosion monitoring of oil and gas pipeline is introduced. The experimental results show that the hoop strain sensor is sensitive to the variation of local wall thickness of oil and gas pipeline and can identify local corrosion.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE983

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