Photo-acoustic leak detection system and method

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

G - Physics

01

M

G01M 3/24 (2006.01) G01M 3/38 (2006.01)

Patent

CA 2116345

An apparatus and method for the rapid detection and location of a gas leak. A collimated beam of light (16) is scanned (12) across the component (13) under test which has been pressurized with a tracer gas (17) that strongly absorbs the light. When the light passes through the gas (15) emerging from the source of the leak, the light energy absorbed by the gas produces an acoustic emission (19) which is detected by a microphone (22). The resulting signal may be processed (20) either as an alarm (21) to notify the operator that a leak is present, or, it may be processed in coordination with the light beam scanning mechanism to indicate (26) exactly where the leak is located on the component under test.

Appareil et procédé de détection et de localisation rapides de fuites de gaz. On fait passer par balayage (12) un faisceau de lumière (16) collimaté sur le constituant (13) soumis à un essai, lequel a été mis sous pression à l'aide d'un gaz traceur (17) absorbant fortement la lumière. Lorsque le lumière passe à travers le gaz (15) sortant de la source de fuite, l'énergie lumineuse absorbée par le gaz produit une émission acoustique (19) détectée par un microphone (22). Le signal obtenu peut être traité (20) soit sous la forme d'une alarme (21) destinée à avertir l'utilisateur de la présence d'une fuite, soit il peut être traité en coordination avec le mécanisme de balayage du faisceau de lumière afin d'indiquer (26) exactement l'endroit où se trouve la fuite sur le constituant soumis à un contrôle.

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