Velocity measuring system
US8804103B2 · kind B2 · utility
3Cited by
25References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2012 |
| Grant date | Aug 12, 2014 |
| Priority date | — |
| Expiry date | Dec 18, 2032 |
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.