Patent · US Expired

Level gauging system

US7053630B2 · kind B2 · utility

13Cited by

8References

38Claims

0Family size

Assignee

SAAB Rosemount Tank Radar AB · DE

Inventors

Jan Westerling · Linköping, SE
Olov Edvardsson · Säter, SE

Key dates

Filing date	Jul 7, 2003
Grant date	May 30, 2006
Priority date	—
Expiry date	Jul 15, 2023

Classification

Technology area (CPC G)Physics
CPC primaryG01S13/88
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A radar level gauge for measuring the level of a surface of a product stored in a tank by use of radar. The radar transmits microwaves towards the surface and receives microwaves reflected by the surface and is adapted to transmit and receive microwaves within two widely separated frequency bands. Widely separated frequency bands are chosen to utilize the differences in attenuation due to foam on the surface and the differences in beam-width or other disturbances. The ratio between the center frequencies of the two widely separated frequency bands can be quantified as at least greater than 1.5:1 or preferably greater than 2:1.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.