Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1992-03-20
1994-03-29
Fields, Carolyn E.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
250339, 250341, G01N 2135
Patent
active
052987515
ABSTRACT:
A remote vapor concentration measurement system comprising a unitary, single-fixed wavelength laser to heat the background surface behind a vapor or gas cloud, the constituents of which are to be detected and measured. A heated background acts as a broad band infrared source for measuring absorption characteristics of the gas or vapor constituents. A spectrally responsive receiver, which for example may be a spectrometer or radiometer having filters at selected wavelengths corresponding to the absorption characteristics of the specie of gas or vapor being detected, is also provided. This receiver measures the relative absorbance of infrared energy at selected wavelengths over a relatively broad infrared range to measure the absorbance characteristics of the specie of gas or vapor of interest. The system also comprises a range finder positioned adjacent the receiver for measuring the distance between the receiver and the background surface along two different paths. The respective paths provide two different distances through the vapor or gas cloud. The concentration of the vapor or gas cloud or constituent thereof may be readily ascertained from two such measurements along such different paths. Concentration of the constituent equals the difference in respective absorbances of the constituent measured along said two different paths, divided by the product of the absorption coefficient of the constituent and the difference in the length along said paths within the vapor or gas cloud.
REFERENCES:
patent: 3662171 (1972-05-01), Brengeman et al.
patent: 3843258 (1974-10-01), Shupe
patent: 4489239 (1984-12-01), Grant et al.
patent: 4496839 (1985-01-01), Bernstein et al.
patent: 4529317 (1985-07-01), Cramp
Brassington, "Photo-acoustic Detection and Ranging-A New Technique for the Remote Detection of Gases", J. Phys. D: Appl. Phys., 15 (2), Feb. 1982, pp. 219-228.
Fee Maurice L.
Lyons Robert B.
Truman Michael A.
Aerojet-General Corporation
Fields Carolyn E.
Tachner Leonard
LandOfFree
Remote active vapor concentration measurement system and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Remote active vapor concentration measurement system and method , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Remote active vapor concentration measurement system and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-794154