Photo-acoustic leak detector with baseline measuring

Details Photo-acoustic leak detector with baseline measuring Photo-acoustic leak detector with baseline measuring

1998-04-16

1998-10-20

Williams, Hezron

Measuring and testing

With fluid pressure

Leakage

73 2402, 25033912, 359305, G01M 308, G01N 2100, G01J 502, G02F 133

Patent

active

058248846

ABSTRACT:
A photo-acoustic leak detection system for detecting a gas leaking from a component includes a beam, having a wavelength, incident on the component and producing an acoustic signal. A second acoustic signal is also produced when an air source dilutes the gas leaking from the component. A signal processor receives sensor signals indicative of both acoustic signals and uses the second sensor signal as a non-leak baseline measurement and provides an output signal indicative of whether a leak exists.

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Allen, Jr., John E. et al., "Optoacoustic pulses in a flame." Optics Letters, vol. 1, No. 4, Oct. 1977, pp. 118-120.

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