Velocity measuring system
US8339584B2 · kind B2 · utility
10Cited by
24References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 21, 2010 |
| Grant date | Dec 25, 2012 |
| Priority date | — |
| Expiry date | Nov 7, 2030 |
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.