Time delay estimation method for leak location of buried water distribution pipes

Losses due to leaking is severe in underground pipes, which necessitates studies on techniques for detecting and locating the leaks. The classical adaptive time delay estimation method, LMSTDE, will give a biased estimate when input data are contaminated with noise. This paper develops and analyses a new adaptive filter structure for time delay estimation (TDE), which can eliminate this bias. Simulation results are included to illustrate the superiority of the new model and corroborate the theoretical developments.