System and method for filling level determination
US8018373B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 19, 2008 |
| Grant date | Sep 13, 2011 |
| Priority date | — |
| Expiry date | Mar 20, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/4078
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A radar level gauge system using microwaves for measuring a level of a surface of a product in a container, comprising a waveguide arranged to extend into the product contained in the container, wherein a plurality of reference impedance transitions are arranged at known position along the waveguide and being configured to reflect a portion of transmitted electromagnetic signals back towards the transceiver. Preferably, each of the reference impedance transitions has a first reflection coefficient for the electromagnetic signals when the level of the surface is above the reference impedance transition and a second reflection coefficient for the electromagnetic signal when the level of the surface is below the reference reflector, the first reflection coefficient being substantially lower than the second reflection coefficient. According to this design, a higher accuracy of filling level measurements can be achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.