Acoustic leak detection system

Details Acoustic leak detection system Acoustic leak detection system

1990-05-04

1992-04-07

Wayner, William E.

Liquid heaters and vaporizers

Safety devices

Alarms or indicators

165 111, 73 405A, F22B 3742

Patent

active

051017741

ABSTRACT:
Paper pulp mill chemical recovery boiler steam piping is monitored for leaks by an acoustic leak detection system responsive to atmospherically carried sound transmissions. Energy level amplitudes of respective analog electrical signals generated sequence multiplicity of microphones are converted in a rapid time sequence to a first electric pulse signal sequence representative of corresponding digital values. Such digital values are temporarily stored in a data memory bank to be subsequently processed by a Fast-Fourier Transform spectral analysis into a second electrical pulse signal sequence representative of corresponding digital values in the amplitude vs. frequency domain. Such amplitude vs. frequency signal values respective to each microphone are further refined for comparison to historical threshold data for a probability determination of a leak status.

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