Acoustic leak detection system

Details Acoustic leak detection system Acoustic leak detection system

1989-08-03

1990-10-02

Wayner, William E.

Liquid heaters and vaporizers

Safety devices

Alarms or indicators

165 111, 73 405A, 73659, F22B 3742

Patent

active

049600796

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 by a multiplicity of microphones are digitized in a rapid time sequence. Such digital values are temporarily stored in a data memory bank to be subsequently processed by a Fast-Fourier Transform analysis into amplitude vs. frequency domain data. Such amplitude vs. frequency data respective to each microphone is further refined for comparison to historical threshold data for a probability determination of a leak status.

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