Abstract:
Based on the time-delay estimation with cross-bispectrum, a new method to examine and locate the leakage point on the water supply pipeline with fast speed, high accuracy and reliability is put foward. The FFT of the third-order statistics of the signal is realized firstly, and then the time-delay according to the cross-bispectrum is estimated. In order to verify the method, the microcontrollers, programmable filters and the technology of wireless communication are used to build the actual test system and then have carried on. The experimental result indicates that this system can examine the pipeline and locate the leaking point accurately under the environment of strong noise. When the noise is weak, this system has higher precision.
