基于信息融合技术的锅炉“四管”泄漏检测  

A New Detection Method of Boiler Tubes Leakage Based on Information Fusion Technology

作　　者：孙文娇[1] 赵虞凌[2] 陈珍珍[1] 

机构地区：[1]东北电力大学自动化工程学院,吉林吉林132012 [2]陕西电力科学研究院,陕西西安710054

出　　处：《陕西电力》2013年第9期77-81,共5页Shanxi Electric Power

摘　　要：锅炉"四管"泄漏多采用声学检测定位,而声学定位的关键步骤是时延估计。为了得到更准确的时延估计值,先采用2种时延估计方法对2路信号的时延时间进行估计,然后采用最小二乘法确定2种时延估计方法的最优权值。通过Matlab对某电厂3次泄漏的相关数据进行处理分析,实例表明采用信息融合将2种时延估计方法的结果进行融合可以得到更准确的时延估计值,从而提高定位精度。Leak accident occurred in boiler tubes is detected by means of aeoustie positioning. Time delay estimation is a key step in the acoustic positioning. In order to get a more accurate time delay estimation, two kinds of time delay estimation methods are used to estimate two-way signal delay time, then least square method is adopted to define the optimal weighs of these two methods. The data processing and analysis about three leakage accidents in a power plant is carried out by MATLAB, and the simulation results show that the more accurate time delay estimation can be obtained based on information fusion method of these two methods, and thereby improve the positioning precision of the boiler tubes leak detection.

关 键 词：声学检测 声学定位 时延估计 信息融合 最小二乘法 

分 类 号：TK223.3[动力工程及工程热物理—动力机械及工程]