| 摘要 |
A method for radar-based gauging of the level of a substance in a tank (13) having at least one interfering structure, e.g. a beam (16a); an agitator (16b) or a tank side wall (16c), comprises transmitting a microwave signal in a predetermined polarization state (LHCP) towards the surface (14) of the substance and the at least one interfering structure; detecting, separately in two different polarization states (LHCP, RHCP), microwave signals (32, 33, 34) as reflected against the surface of the substance and against the at least one interfering structure; distinguishing based on signal strengths of the microwave signals detected separately in the two different polarization states, the detected microwave signal (32), which has been reflected against the surface of the substance; and calculating based on a propagation time of the distinguished microwave signal the level of the substance in the tank. <IMAGE> |
