Method and apparatus for real-time calibration of a liquid storage tank level gauge
US7891229B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 13, 2008 |
| Grant date | Feb 22, 2011 |
| Priority date | — |
| Expiry date | Aug 5, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/284
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system and method are provided that receive a signal representing a reflection of an electromagnetic wave from a liquid and from one or more reference pins in a storage tank. A sensed distance to the liquid and one or more sensed distances to the pins are calculated from the signal, and the sensed distances to the pins are compared to one or more reference distances. A correction factor is calculated based on the comparison of the sensed distances and the reference distances, and a corrected distance to the liquid is calculated based on the correction factor and the sensed distance to the liquid. While the storage tank is empty, a reference signal representing a reflection of an electromagnetic wave from the reference pins may be obtained and reference sensed distances to the reference pins calculated and stored as the reference distances.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.