Optics: measuring and testing – For size of particles – By particle light scattering
Patent
1982-05-28
1985-02-05
Nelms, David C.
Optics: measuring and testing
For size of particles
By particle light scattering
73 29, 250227, 250574, 356339, 356341, 356342, 356343, G01N 1502
Patent
active
044975775
ABSTRACT:
A steam wetness measuring apparatus comprises a light source, a part defining a measuring space when the apparatus is inserted into a wet steam flow, an optical fiber bundle for transmitting the incident light beam from the light source to the measuring space, and optical fiber bundles for transmitting to a photo-electric converter element a plurality of scattered light beams of different scattering angles obtained by radiation of the incident light beam on the measuring space. The fact that the intensity of the scattered light beam changes with the wavelength of the incident light or changes with the scattering angle of the scattered light beam, in accordance with the particle size distribution of water droplets in the wet steam is used to determine the particles size distribution. The steam wetness is determined from the particles size distribution and the physical properties of the wet steam flow.
REFERENCES:
patent: 3540826 (1970-11-01), Bisberg
patent: 4137462 (1979-01-01), Wyler
patent: 4154529 (1979-05-01), Dyott
patent: 4295368 (1981-10-01), Jannone
Ferrara et al., "Evolution of the Fog Droplet Size Distribution Observed by Laser Scattering", Applied Optics, vol. 9, No. 11, pp. 2517-2521, 11/70.
Sato Takeshi
Shigeta Kengo
Tsuji Syogo
Uenishi Akira
Hitachi , Ltd.
Koren Matthew W.
Nelms David C.
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