Photo-acoustic leak detection system and method

Details Photo-acoustic leak detection system and method Photo-acoustic leak detection system and method

1991-08-26

1992-11-10

Williams, Hezron E.

Measuring and testing

With fluid pressure

Leakage

73 405A, 73592, 250334, G01M 320

Patent

active

051614081

ABSTRACT:
An apparatus and method for the rapid detection and location of a gas leak. A collimated beam of light is scanned across the component under test which has been pressurized with a tracer gas that strongly absorbs the light. When the light passes through the gas emerging from the source of the leak, the light energy absorbed by the gas produces an acoustic emission which is detected by a microphone. The resulting signal may be processed either as an alarm to notify the operator that a leak is present, or, it may be processed in coordination with the beam scanning mechanism to indicate exactly where the leak is located on the component.

REFERENCES:
patent: 3925666 (1975-12-01), Allan et al.
patent: 4457162 (1984-07-01), Rush et al.
patent: 4555627 (1985-11-01), McRae et al.
patent: 4772789 (1988-09-01), Maram et al.

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