Radiant energy – Luminophor irradiation – With ultraviolet source
Patent
1993-11-22
1995-05-02
Hannaher, Constantine
Radiant energy
Luminophor irradiation
With ultraviolet source
250253, G01N 2164
Patent
active
054122198
ABSTRACT:
An improved method for detecting, measuring, and distinguishing crop residue, live vegetation, and mineral soil. By measuring fluorescence in multiple bands, live and dead vegetation are distinguished. The surface of the ground is illuminated with ultraviolet radiation, inducing fluorescence in certain molecules. The emitted fluorescent emission induced by the ultraviolet radiation is measured by means of a fluorescence detector, consisting of a photodetector or video camera and filters. The spectral content of the emitted fluorescent emission is characterized at each point sampled, and the proportion of the sampled area covered by residue or vegetation is calculated.
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William R. Hemphill, Arnold F. Theisen, and R. Michael Tyson, "Laboratory Analysis and Airborne Detection of Materials Stimulated to Luminesce by the Sun" Journal of Luminescence, vols. 31 & 32, Part II (Dec. 1984) pp. 724-726 Copyright .COPYRGT. Elsevier Science Publishers B.V.
Chappelle, McMurtrey, Daughtry, "A Fluorescence Technique for the Assessment of Crop Residue", Apr. 20, 1993, pp. 94-96. Place of publication not suppled by applicant.
McMurtrey, Chappelle, Daughtry, Kim, "Fluorescence and Reflectance of Crop Residue and Soil", May 1993 Journal of Soil and Water Conservation vol. 48, No. 3.
Daughtry, McMurtrey, Chappelle, Dulaney, Irons, Satterwhite, "Discriminating Crop Residues from Soil by Reflectance and Fluorescence Techniques", Aug. 1993 pp. 1325-1328 Place of publication not supplied by applicant.
Chappelle Emmett W.
Daughtry Craig S. T.
McMurtrey, III James E.
Hannaher Constantine
Marchant R. Dennis
Miller Guy M.
Petuchowski Samual J.
The United States of America as represented by the Administrator
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