Optics: measuring and testing – Velocity or velocity/height measuring – With light detector
Patent
1995-06-07
1997-12-23
Hellner, Mark
Optics: measuring and testing
Velocity or velocity/height measuring
With light detector
73861, G01P 336
Patent
active
057011729
ABSTRACT:
In keeping with one aspect of this invention, apparatus for measuring the flow of gas in a pipeline includes an optical transmitter, an optical receiver and a processor. The apparatus measures the flow of gas through a generally cylindrical gas pipeline, engine intake or the like. The transmitter includes a laser diode array and a collimator lens which are preferably located outside of the pipeline, or in the wall of the pipeline. The transmitter generates multiple, spaced, discrete laser spots in the pipeline. Particles in the gas scatter the light as they pass through it, and the scattered light is received by another collimator lens and photodetector, which are also preferably outside of or in the wall of the pipeline. The output of the photodetector is processed by a computer which calculates the velocity of the particles and hence the flow rate of the gas. Pre-recorded holographic film can also be used in the transmitter and receiver to create holographic images at several different radii in the pipeline. In that case, the computer also calculates the volumetric flow rate of gas flowing through different parts of the pipeline, and can reveal the presence of turbulence in the pipeline.
REFERENCES:
patent: 3446558 (1969-05-01), Seaton
patent: 3532427 (1970-10-01), Paine
patent: 3547540 (1970-12-01), Shigemoto
patent: 3604807 (1971-09-01), Champagne
patent: 3723004 (1973-03-01), Brayton
patent: 3897152 (1975-07-01), Farmer et al.
patent: 4063814 (1977-12-01), Rhodes
patent: 4201467 (1980-05-01), Hartmann et al.
patent: 4311383 (1982-01-01), Ohtsubo
patent: 4725136 (1988-02-01), McCullough et al.
patent: 4851697 (1989-07-01), Schodl
patent: 4864515 (1989-09-01), Deck
patent: 4923298 (1990-05-01), Dopheide et al.
patent: 4927263 (1990-05-01), de Groot et al.
patent: 5148229 (1992-09-01), Wiseall
patent: 5268739 (1993-12-01), Martinelli et al.
patent: 5517298 (1996-05-01), Devenport
Gas Research Institute
Hellner Mark
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