Optical fiber flow velocity measuring apparatus and method integrating high and low ranges
US11624756B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2021 |
| Grant date | Apr 11, 2023 |
| Priority date | — |
| Expiry date | Oct 18, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F7/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed is an optical fiber flow velocity measuring apparatus and method integrating high and low ranges. The apparatus includes an integrated optical fiber flow velocity sensor, the integrated optical fiber flow velocity sensor includes a sensor body; a fluid channel, a fluid through hole, a full-pressure channel, a static-pressure channel, a low-pressure chamber and a high-pressure chamber are provided inside the sensor body; a first optical fiber sensing element is provided between the low-pressure chamber and the high-pressure chamber; a second optical fiber sensing element is provided in the fluid through hole and is perpendicular to a flow direction of a fluid to be measured; the first optical fiber sensing element and the second optical fiber sensing element are sequentially connected in series through a single-mode optical fiber; both ends of the single-mode optical fiber are connected into a wavelength division multiplexer; a pump light source is connected with the wavelength division multiplexer through a common optical fiber; an optical fiber grating demodulator is connected with the wavelength division multiplexer through a common optical fiber; and a flow velocity ar…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.