管道泄漏检测方法研究及系统实现

发布时间：2018-07-27 09:45

【摘要】：随着石油、天然气等工业的发展,管道运输方式由于其具有占地少、安全性高、运输总量大等优点,日益成为现代工业的重要运输方式。但是由于管道腐蚀、老化及人为损坏等原因,管道泄漏事件常有发生,造成了严重的环境污染和经济损失。本文的工作目的是设计一套管道泄漏检测系统,能在实际环境中对管道泄漏点位置进行准确定位。本文深入研究了用于泄漏检测算法中的时延估计方法包括广义互相关法和基于最小均方差自适应滤波法,并利用仿真信号和实际管道数据分析两种算法的可行性和准确性。在系统的硬件部分,选取合适的传感器,分别设计了系统的信号调理模块、数据采集模块以及CPU模块；在系统软件方面,编写了广义互相关法和最小均方差自适应滤波法的Matlab程序,利用LabVIEW软件丰富的控件库和友好的交互性分别设计了数据接收模块、数据处理模块、前端显示模块和参数设置模块,同时用数据库存储下位机上传的管道数据用以历史数据的查询与处理。最后,在现有实验环境的基础上设计了一套实验系统,通过一系列泄漏数据确定系统最终的检测算法以及验证泄漏检测系统的可行性和正确性。
[Abstract]:With the development of oil, natural gas and other industries, pipeline transportation has become an important mode of transportation in modern industry because of its advantages such as small land occupation, high safety and large transportation. However, due to pipeline corrosion, aging and man-made damage, pipeline leakage often occurs, causing serious environmental pollution and economic damage. The purpose of this paper is to design a pipeline leak detection system, which can accurately locate the location of the leak point in the actual environment. This paper deeply studies the time delay estimation methods used in the leakage detection algorithms, including the generalized cross correlation method and the minimum mean square error adaptive filtering method, and use the simulation signal and the actual tube. The feasibility and accuracy of the two algorithms are analyzed. In the hardware part of the system, the suitable sensors are selected, the signal conditioning module, the data acquisition module and the CPU module are designed respectively. In the system software, the Matlab program of the generalized cross correlation method and the minimum mean square error adaptive filtering method is written, and the soft LabVIEW is used in the system software. The data receiving module, the data processing module, the front display module and the parameter setting module are designed respectively. At the same time, the pipeline data uploaded by the lower computer is used to query and process the historical data. Finally, a set of experimental system is designed on the basis of the existing testing environment. A series of leakage data is used to determine the final detection algorithm of the system and verify the feasibility and correctness of the leak detection system.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE973.6;TP274

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