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Amplitude distortion of measured leak noise signals caused by instrumentation: Effects on leak detection in water pipes using the cross-correlation method
(2019-11-24)
A common way to detect and locate leaks in buried water pipes is to use leak noise correlators. Vibration or acoustic signals are measured on or in the pipe using sensors placed either side of the leak, and the difference ...
A laboratory-based leak noise simulator for buried water pipes
(2022-01-01)
Acoustic correlators are often used to pinpoint leaks in water distribution systems. Generally, these devices are tested for their efficacy in bespoke test rigs that are also used for training purposes. However, this can ...
A stochastic model for the speed of leak noise propagation in plastic water pipes
(2021-06-09)
A good estimate of the speed of leak noise propagation is necessary to pinpoint the location of a leak using acoustic correlators. Models currently exist for this purpose, but they do not consider uncertainties in the pipe ...
Using a geophone as an actuator to estimate the velocity of leak noise propagation in buried water pipes
(2021-12-15)
A common way to pinpoint a leak in a buried plastic water pipe is to use a leak noise correlator. This is performed by using the time delay between two measured signals and the velocity at which such signals travel along ...
On the role of vibro-acoustics in leak detection for plastic water distribution pipes
(2017-01-01)
Leaks have been detected and localized in water distribution in many countries for years, by using the cross-correlation of pipe vibration measured either side of a suspected leak and/or by using listening sticks. However, ...
The dynamic behaviour of a buried water pipe and its effect on leak location using acoustic methods
(2013-09-16)
Leakage in buried pipes is one of the main concerns for water companies due to the scarcity of potable water sources. Older metallic pipelines have been replaced by plastic pipes in such systems, which makes it more difficult ...
The dynamic behaviour of a buried water pipe and its effect on leak location using acoustic methods
(2013-09-16)
Leakage in buried pipes is one of the main concerns for water companies due to the scarcity of potable water sources. Older metallic pipelines have been replaced by plastic pipes in such systems, which makes it more difficult ...
Measurement of the speed of leak noise propagation in buried water pipes: Challenges and difficulties
(2018-01-01)
To accurately determine the position of a leak in a buried plastic water pipe using acoustic correlation, a good estimate of the speed of noise propagation (wave speed) is required. The factors that affect this wave speed, ...
A virtual pipe rig for testing acoustic leak detection correlators: Proof of concept
(2016-01-15)
Acoustic correlators have been used for many years to locate and detect leaks in buried water distribution pipes. Currently, the only way to compare different correlators directly is in the field. This can be problematic ...