导　　师： 李一博

学科专业： H0401

授予学位： 硕士

作　　者： ;

机构地区： 天津大学

摘　　要： 在经济发展日新月异的今天,人们对石油等能源资源的需求越来越大,受制于国内资源储量和产能,中国的石油对外依存度日益提高。国际油价受诸多因素影响波动较大,为了平抑油价短期波动对经济发展带来的不良影响,中国已经开始建立原油战略储备。该储备规划将会配套建设相当数量的大型原油储罐,这些储罐以后都将面临着如何确保罐底板安全性的问题。声发射罐底腐蚀检测技术作为一种在线无损检测手段,有着非常广阔的应用前景。 本文围绕着储罐声发射罐底腐蚀检测过程中数据采集环节的相关问题进行了研究。通过分析一天之内声发射数据量的变化趋势寻找检测结果与昼夜变化的联系,介绍了护卫传感器方法在罐底腐蚀检测中的实际应用,探究了传感器布置间距和布置高度与声发射检测结果的关系,总结了检测过程中储罐的静置与加载带来的影响。 本文通过上述工作,归纳了数据采集的合理时机,描写了护卫传感器的实际应用并确认储罐的静置对声发射检测结果影响有限。 本文中所涉及的原始数据均由本课题组和中石油管道科技中心合作取得,数据处理软件采用了美国物理声学公司/(PAC/)的声发射处理软件AEwin,并利用MATLAB软件实现了功能扩展。 本文是将声发射罐底腐蚀检测技术在实际应用的有益探索,经过数据分析得到的数据采集阶段相关结论,对声发射罐底腐蚀检测技术以后的发展及其在罐底腐蚀评估的实际应用具有推动作用。 With the current rapid economic development, people have growing demand for petroleum resources. Subject to domestic reserves and production capacity, China's oil import has been increasing. Affected by many factors the international oil price is volatile. In order to bring prices down short-term fluctuations in the adverse effects of economic development, China has begun to build strategic reserves of crude oil. The reserve plan will support the establishment of a significant number of large crude oil storage tanks, and these tanks will be facing the problem that how to ensure the security issues of the tank bottom. As on-line non-destructive testing technology, acoustic emission corrosion detection has a very broad application prospects. This paper focuses on several aspects in data acquisition of tank bottom corrosion detection based on Acoustic Emission. By analyzing the data collected within a whole day, the author tries to find the link between acoustic emission test results and the diurnal variation. Through on-site detection, the article introduces the practical application of the guard-sensor-method in tank bottom corrosion detection. By means of changing different parameters, the author attempts to explore the relationship between acoustic emission detection results and the layout of the sensor, such as the spacing and the height. Still this paper seeks to summarize the impact of the standing and the load of the tank in the detection process. After the above-mentioned work, this article generalizes the reasonable data acquisition time and describes the practical application of guard-sensor-method and also digs out that the standing of tank has limited impact on acoustic emission detection results. The original data involved in this paper are all acquired by us research group in cooperation with and pipeline technology center of CNPC /(China National Petroleum Corporation/). The data processing software is AEwin of PHYSICAL ACOUSTIC CORP./(PAC/) and also MATLAB is used to carry out extensions. This article is useful exploration in the practical application of tank bottom corrosion detection based on acoustic emission. Conclusions obtained after data analysis in the data acquisition phase will promote the development of acoustic emission tank bottom corrosion detection technology and its practical application in tank bottom corrosion evaluation.

关 键 词： 声发射 储罐罐底 腐蚀检测 数据采集

分 类 号： [TP]

领　　域： [自动化与计算机技术]