Laser doppler anemometer using high-frequency laser pulses

Details Laser doppler anemometer using high-frequency laser pulses Laser doppler anemometer using high-frequency laser pulses

1988-08-01

1990-12-04

Tarcza, Thomas H.

Optics: measuring and testing

Velocity or velocity/height measuring

With light detector

356345, G01P 336

Patent

active

049749609

ABSTRACT:
A laser Doppler anemometer with at least two laser beams pass to a region of a fluid flow containing particles. The scattered light is frequency shifted by the Doppler frequency resulting from the flow speed. The construction is very compact and permits a high signal-to-noise ratio for the measurement signals. The laser beams consist of high-frequency pulses, the frequency of the pulse sequence of which is a multiple of the Doppler frequency.

REFERENCES:
patent: 4036557 (1977-07-01), Christensen
patent: 4447149 (1984-05-01), Marcus et al.
patent: 4652120 (1987-03-01), Sell

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