Velocity measuring system
US9709594B1 · kind B1 · utility
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27References
2Claims
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Key dates
| Filing date | Apr 10, 2014 |
| Grant date | Jul 18, 2017 |
| Priority date | — |
| Expiry date | Jul 23, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S2007/4977
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.