Velocity measuring system
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 dom...
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| Sprache: | eng |
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| Zusammenfassung: | 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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