Method for robust gauging accuracy for level gauges under mismatch and large opening effects in stillpipes and related apparatus
US8271212B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 3, 2009 |
| Grant date | Sep 18, 2012 |
| Priority date | — |
| Expiry date | Aug 21, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/284
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method includes transmitting wireless signals towards a material in a tank and receiving wireless signals reflected off the material. The method also includes calculating a phase velocity of the wireless signals reflected off the material and identifying a level of the material in the tank using the phase velocity. Calculating the phase velocity of the wireless signals could include identifying a plurality of linearly-spaced frequencies and performing linear interpolation using the data identifying the wireless signals to identify data points at the linearly-spaced frequencies. The identification of the data points at the linearly-spaced frequencies could represent the only interpolation operation performed during the calculation of the phase velocity and the identification of the level of the material. Moreover, a mismatch could exist between an inner diameter of a stillpipe through which the wireless signals are transmitted and a diameter of an antenna used to receive the wireless signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.