Method and apparatus for determining the absolute value of the flow velocity of a particle-transporting medium
US11543273B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 18, 2019 |
| Grant date | Jan 3, 2023 |
| Priority date | — |
| Expiry date | May 15, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2015/1493
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a method for determining the absolute value of the flow velocity (v) of a particle-transporting medium. At least two measurement laser beams (L_i) with linearly independent, non-orthogonal measurement directions (b_i) are emitted. The measurement laser beams (L_i) scattered at particles are detected and one measurement signal (m_i) is generated in each case for each measurement laser beam (L_i). The measurement signals (m_i) are evaluated, wherein absolute values of velocity components (v_i) are ascertained as projections of the flow velocity (v) on the respective measurement directions (b_i), wherein a solid angle region is ascertained for the prevalent direction of the flow velocity (v) and signs assigned to this solid angle region are chosen for the individual velocity components (v_i), and wherein the absolute value of the flow velocity (v) is determined using the ascertained absolute values of the velocity components (v_i) and using the chosen signs for the velocity components (v_i).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.