Laser velocimetry technique for measuring the three dimensional

Details Laser velocimetry technique for measuring the three dimensional Laser velocimetry technique for measuring the three dimensional

1991-02-08

1992-09-15

Buczinski, Stephen C.

Optics: measuring and testing

Velocity or velocity/height measuring

With light detector

356 285, G01P 336

Patent

active

051482290

ABSTRACT:
A laser velocimetry technique for the measurement of the three dimensional components of velocity of a particle in a fluid flow has been described. It is based on the use of a measurement region consisting of two optical probe volumes. The two optical probe volumes are physically separate and each consists of an optical fringe pattern formed by the interference of two coherent beams of the same wavelength. Two of the components of velocity are determined experimentally from the doppler signals arising from the frequency change of light scattered from a particle suspended in the fluid flow as it passes through probe volumes. The third component of velocity is derived from measuring the time of flight of a particle in the fluid flow as it passes from the center of one probe volume to another probe volume.

REFERENCES:
patent: 3860342 (1975-01-01), Orloff et al.
patent: 4537503 (1985-08-01), Liu
patent: 4537507 (1985-08-01), Hess
patent: 4540283 (1985-09-01), Bachalo
patent: 4697922 (1987-10-01), Gunter, Jr. et al.
patent: 4838687 (1989-06-01), Pfeifer

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