Fluid velocity measurement apparatus
US5982478A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1997 |
| Grant date | Nov 9, 1999 |
| Priority date | — |
| Expiry date | Feb 19, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S2007/52014
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Fluid velocity measurement apparatus which utilizes Doppler-shift spectral analysis includes a narrow line width light source, the light from which passes through a beam expander to provide an irradiated region, for example a two-dimensional plane, in which velocity measurements may be taken. Light scattered from small particles in the irradiated region is collected in an imaging system which enables spectral analysis of the scattered light for determining the velocity of the light scattering particles in the irradiated region. A single camera is used in the imaging system to obviate the need for costly electronics to synchronize images obtained Also to improve the accuracy of measurement, selected parameters of the apparatus may be measured to allow for perturbations in the velocity measurements obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.