泄漏信号定位中的时延估计算法  

Time Delay Estimation Algorithms for Leak Signal Location

作　　者：杨荣根[1,2] 任明武[1] 杨静宇[1] 

机构地区：[1]南京理工大学计算机学院,江苏南京210094 [2]淮阴工学院计算机工程学院,江苏淮安223003

出　　处：《信息与控制》2011年第1期8-13,共6页Information and Control

基　　金：国家自然科学基金资助项目(60875010)

摘　　要：分析了泄漏定位的基本原理、泄露信号模型,研究了各种时延估计算法(如相关、广义互相关方法,自适应最小均方方法等),这些时延估计算法因其抗噪性能不同而有其各自的应用场合.在一段合成的声波数据上进行了实验,利用各种算法分别在相同信噪比不同时延和相同时延不同信噪比的条件下进行时延估计,分析比较算法性能.将相关方法应用于输油管线泄漏检测定位,定位结果误差不超过5%.The basic principle of leak location and leak signal models are analyzed.A variety of time delay estimation （TDE） algorithms such as cross-correlation（CC）,generalized cross-correlation（GCC）,and the adaptive least mean square （LMS）,etc.are also studied.These TDE algorithms which show different anti-noise capability,are applied to diverse application scenarios.Experiments are conducted on a synthesis acoustic signal to estimate the time delay and compare the performance of the algorithms in the conditions that time delay is diverse while the signal noise ratio is equivalent and time delay is equivalent while the signal noise ratio is diverse.The cross-correlation method is used to leak location for oil pipeline,and the error of location results is not more than 5%.

关 键 词：时延估计 相位变换广义相关 最大似然广义相关 自适应最小均方 泄漏检测 

分 类 号：TP181[自动化与计算机技术—控制理论与控制工程]