Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1998-05-18
2000-12-05
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
25033906, 25033911, 25033913, 2503411, G01N 2135
Patent
active
061570338
ABSTRACT:
A method and apparatus for remote detection of gas leak and determination of the relative concentration of a gas using nondispersive infrared absorption of backscattered laser light with background compensation. The method includes source of coherent infrared radiation, sealed reference cell, filled with air with admixture of reference gas of known concentration, sealed control cell filled with air, sensitive elements which are sensitive to radiant fluxes in a determined band of wavelengths. The method includes measuring output signals, calculating the difference of the signals from control cell for different points, the difference of signals from reference cell and control cell, the ratio of said differences and relative concentration, and means for converting said concentration into visual image and audio signal. The apparatus includes camera or video camera to record a visual image of an object at the point where the maximum relative concentration was recorded and laser pointer to indicate a position of invisible infrared beam on a target.
REFERENCES:
patent: 3976884 (1976-08-01), Acton
patent: 4390785 (1983-06-01), Faulhaber et al.
patent: 4489239 (1984-12-01), Grant et al.
patent: 4543481 (1985-09-01), Zwick
patent: 4555627 (1985-11-01), McRae
patent: 4996431 (1991-02-01), Bonne et al.
patent: 5161408 (1992-11-01), McRae et al.
patent: 5430293 (1995-07-01), Sato et al.
patent: 5656813 (1997-08-01), Moore et al.
H.S. Lee, H.H. Zwick. Gas Filter Correlation Instrument for the remote sensing of gas leaks. Rev. Sci. Instrum, Sep. 1985, p. 1812-1819, v56, N9, USA.
Thomas G. McRae and Thomas J. Culp. Backscatter Absorption Gas Imaging: New Technique for Gas Visulization. Appered Optic, Jul. 1993, p. 4037-4050, v.32, N21, USA.
Gagliardi Albert
Golden Larry I.
Hannaher Constantine
Power Distribution Services, Inc.
Shrout Larry T.
LandOfFree
Leak detection system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Leak detection system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Leak detection system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-963587