ACOUSTIC EMISSION LEAK SOURCE LOCATION

A method and apparatus for locating a leak which produces a continuous acoustic emission having background noise and spikes, comprises continuously monitoring the acoustic emissions using spaced apart detectors which produce signals having background noise and spikes corresponding to those of the co...

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Bibliographic Details
Main Authors MICHAEL O. ROBERTSON, ROBERT S. EVANS, JOHN E. COULTER
Format Patent
LanguageEnglish
Published 26.07.1990
Edition5
Subjects
MEASURING
PHYSICS
TESTING
TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES
TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR
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Summary:A method and apparatus for locating a leak which produces a continuous acoustic emission having background noise and spikes, comprises continuously monitoring the acoustic emissions using spaced apart detectors which produce signals having background noise and spikes corresponding to those of the continuous acoustic emissions. The spikes of one signal are offset in time with respect to the spikes of the other signal, which corresponds to the difference in travel time of the acoustic signals to each of the detectors. By measuring the offset between the spikes, the relative position of the acoustic emission, and thus the relative position of the leak, can be determined with respect to the position of the detectors. To facilitate separating the spikes from the background noise, a floating detection threshold value is applied to the signals for eliminating the background noise.
Bibliography:Application Number: AU19900048554