Leak detection in pipelines

Details Leak detection in pipelines Leak detection in pipelines

1983-12-08

1985-09-24

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

G01J 100

Patent

active

045434816

ABSTRACT:
Leaks in natural gas pipelines are detected by an airborne gas cell correlation radiometer having two channels, one to detect methane and the other to detect nitrous oxide. The channel outputs are compared in order to detect anomalies in their relative magnitude, an increase in methane concentration relative to nitrous oxide concentration being indicative of a gas leakage in the area from which the radiometer receives radiation.

REFERENCES:
patent: 3783284 (1974-01-01), McCormack
patent: 3976884 (1976-08-01), Acton et al.
patent: 4013260 (1977-03-01), McClatchie
patent: 4390785 (1983-06-01), Faulhaber et al.
patent: 4489239 (1984-12-01), Grant et al.
Murray et al., "Remote Measure. of HCl, CH.sub.4, and N.sub.2 O . . . ", Applied Optics, vol. 15, No. 12, Dec. 1976, p. 3140.

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