Velocity measuring system

Details Velocity measuring system Velocity measuring system

G - Physics

01

S

G01S 13/58 (2006.01) G01F 1/66 (2006.01) G01S 13/62 (2006.01) G01F 23/296 (2006.01)

Patent

CA 2741068

A laser Doppler velocimeter uses self-mixing amplification of backreflections from scatterers below the surface of a flow. A time domain signal is divided into segments that are roughly equal to a transit time of particles through a focus of a laser beam. The segments are connected to a frequency domain through the use of an FFT algorithm to produce frequency domain data segments. Signal-to-noise ratio is enhanced through signal processing techniques using the segments to produce a final enhanced signal spectrum.

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