Sonic detection of gas leaks in underground pipes

Details Sonic detection of gas leaks in underground pipes Sonic detection of gas leaks in underground pipes

1982-03-29

1984-06-26

Goldberg, Gerald

Measuring and testing

With fluid pressure

Leakage

73579, G01M 324

Patent

active

044558635

ABSTRACT:
An apparatus and process for locating gas leaks in underground pipelines by detection of sound waves created by the leaking gas. The apparatus and process uses a sound transducer attached to an elongated probe inserted in the ground for a substantial portion of its length. The elongated probe and transducer combination has an effective mechanical resonant frequency equal to or below the electrical resonant frequency of the sound transducer. The passive sonic detection apparatus and process of this invention provides improved sensitivity for detection of sounds created by leaking gas and thereby more accurate pinpointing of the gas leak in an underground pipeline. In one embodiment acoustic reflection and absorption shielding is provided for reduction of system response to airborne noise.

REFERENCES:
patent: 714775 (1902-12-01), Brown
patent: 3055209 (1959-11-01), Reid et al.
patent: 3223194 (1965-12-01), Michael
patent: 3264864 (1966-08-01), Reid et al.
patent: 3500676 (1970-03-01), Palmer
patent: 3592967 (1971-07-01), Harris
patent: 3955404 (1976-05-01), Bickel et al.
J. R. Sabo, Detect Buried Steam Leak with Acoustics, Jul. 1976.

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