管道泄漏检测中两个难点问题的研究进展

管道泄漏常常造成环境污染、财产损失和人员伤亡，由于其发生的隐蔽性，对管道泄漏的及时识别与准确定位具有重要的现实意义，但在检测中存在两个问题目前并没有得到很好地解决，即管道泄漏声发射应力波的频散问题、管网泄漏的检测成本（时间成本、传感器数目等）和检测精度之间的矛盾问题。本文围绕这两个问题，分别重点介绍了“管道泄漏模态声发射检测（连续型、突发型）”以及“管网泄漏检测（泄漏源定段、传感器布置、算法）”的国内外研究现状，梳理了众多文献间的区别和联系。最后分析了当前研究的不足，并对这两个问题的未来研究方向做出了展望。

Review of two knotty issues on testing of pipe leakage

Pipe leakage may cause environmental pollution, property losses and casualties. It is very important to detect in time and accurately locate pipe leakage for its concealment. There are two issues remained to be settled better in testing: the dispersion phenomena of acoustic emission stress wave induced by pipe leakage, the contradiction between cost (time cost and number of sensors) and precision in leakage testing of pipe network. Concerning these two issues, the corresponding summarization at home and abroad are introduced emphatically, including modal acoustic emission testing technique for continuous and burst type pipe leakage and pipe network leakage testing such as isolation of leakage source, arrangement of sensors and algorithm. The difference and relationship of the previous relevant literatures are combed through in detail. Finally, the deficiencies of present research are discussed and future research objects on these two issues are proposed.