Optics: measuring and testing – For light transmission or absorption
Patent
1989-11-24
1991-12-03
McGraw, Vincent P.
Optics: measuring and testing
For light transmission or absorption
356335, G01N 2185, G01N 1502
Patent
active
050695517
ABSTRACT:
A method and apparatus are shown to measure unburned carbon particles in the exhaust of a combustor. Photoacoustic absorption spectrometry is employed to measure the presence of the unburned carbon. Especially helpful in these measurements is a vertically elongated photoacoustic cell in which high flow velocities are maintained to prevent particles from settling. These measurements are useful in determining the efficiency of coal-fired combustors.
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In-Situ Measurements of Aerosol Absorption with a Resonant Cu Laser Spectrophone--C. W. Bruce & R. G. Pinnick--Applied Optic 2, vol. 16, No. 7, Jul. 1977.
Japar, Steven M. and Szkarlat, Ann Cuneo, Combustion Science and Technology, 1981, vol. 24, pp. 215-219, "Measurement of Diesel Vehicle Exhaust Particulate Using Photoacoustic Spectroscopy".
Iowa State University & Research Foundation, Inc.
Keesee, II LaCharles P.
McGraw Vincent P.
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