Abstract: Actively generated pressure waves are studied widely and applied in transient-based leak detection for pipe systems. High-frequency (HF) waves, the wavelength of which is on the order of the pipe diameter or smaller, provide ...

Abstract: The presence of blockages in water supply systems wastes energy, decreases system performance, and may pose safety concerns. Previous research showing that blockages induce a shift in the resonant frequencies (eigenfrequencies) ...

Abstract: Many transient-based defect detection methods are based on matching the transient model to the measured data to localize the defects. Despite the high degree of success in laboratory systems, this approach has not been ...

Abstract: Eigenfrequency shift in a pipe with a blockage is investigated experimentally. The experimental test rig consists of a reservoir-pipe-valve (RPV) system that contains a single partial blockage. Blockages with different ...

Abstract: Recent studies of measured transient pressure signals showed that eigenfrequencies shift with changes in cross-sectional area of the conduit and used this fact to develop blockage-detection algorithms. However, an understanding ...

Abstract: Due to random noise in real measurements, leak detection (estimation of leak size and location) is subject to a degree of uncertainty. This paper provides a framework to investigate the lower bound of the variance of a ...

Abstract: Several pipeline blockage detection methods assume blockages have a regular geometric shape; that is, the blocked section is a pipe of smaller diameter than the original. These methods require a priori knowledge of the ...

Abstract: Due to random noise in real measurements, leak detection (estimation of leak size and location) is subject to a degree of uncertainty. This paper provides a framework to investigate the lower bound of the variance of a ...

Abstract: Several pipeline blockage detection methods assume blockages have a regular geometric shape; that is, the blocked section is a pipe of smaller diameter than the original. These methods require a priori knowledge of the ...

Abstract: In a previous paper, the authors proposed a transient-based area reconstruction method to identify multiple blockages in pipe systems without prior knowledge of their geometry and number, resulting in very accurate numerical ...