Leak locating microphone, method and system for locating fluid l

Details Leak locating microphone, method and system for locating fluid l Leak locating microphone, method and system for locating fluid l

1993-09-27

1994-09-20

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Distance or direction finding

By combining or comparing signals

73 405A, 367167, 367172, G01S 380, G01M 300

Patent

active

053495683

ABSTRACT:
A leak detecting microphone inserted directly into fluid within a pipe includes a housing having a first end being inserted within the pipe and a second opposed end extending outside the pipe. A diaphragm is mounted within the first housing end and an acoustic transducer is coupled to the diaphragm for converting acoustical signals to electrical signals. A plurality of apertures are provided in the housing first end, the apertures located both above and below the diaphragm, whereby to equalize fluid pressure on either side of the diaphragm. A leak locating system and method are provided for locating fluid leaks within a pipe. A first microphone is installed within fluid in the pipe at a first selected location and sound is detected at the first location. A second microphone is installed within fluid in the pipe at a second selected location and sound is detected at the second location. A cross-correlation is identified between the detected sound at the first and second locations for identifying a leak location.

REFERENCES:
patent: 4289019 (1981-09-01), Claytor
patent: 4435974 (1984-03-01), Fuchs et al.
patent: 5205173 (1993-04-01), Allen

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