Method for determining the velocity of a flow

Details Method for determining the velocity of a flow Method for determining the velocity of a flow

1995-07-28

1997-11-04

Buczinski, Stephen C.

Optics: measuring and testing

Velocity or velocity/height measuring

With light detector

73861, G01P 336

Patent

active

056845723

ABSTRACT:
In a method for determing the velocity of a flow seeded with particles reflecting light, the particles located in a light sheet (4) are illuminated with monochromatic light (5). The doppler-shifted frequency of the light reflected sideways out of the light sheet (4) by the particles is determined, and the velocity of the flow is determined from the doppler-shifted frequency. The un-shifted frequency of the monochromatic light with which the particles in the light sheet are illuminated is determined continously, and is used as a basis for the determination of the velocity of the flow from the doppler-shifted frequency.

REFERENCES:
patent: 3984685 (1976-10-01), Fletcher et al.
patent: 4707698 (1987-11-01), Constant
patent: 4919536 (1990-04-01), Komine
"Stromungs-und Teilchenmessung mittels Doppler-Anemometrie", by Franz Durst, Manfred Stieglmeier und Maris Ziema, pp. 15-23, 1993.
"Laser-und Avalanche-Dioden Fur die Geschwindigkeits-messung mit Laser-Doppler-Anemometrie", by D. Dopheide, M. Faber, G. Reim und G. Taux, pp. 291-302, 1987.
"Lasermethoden in der Stromungsmesstechnik", by B. Ruck, pp. 46-49.

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