Patent ID: 9035822
Filing Date: 2015-05-19
Classification: G01F,G01S,H01Q

Abstract:
1. A method of determining a filling level of a product contained in a tank using a level gauge system comprising a transceiver; a propagating device connected to said transceiver; and processing circuitry connected to said transceiver, said method comprising the steps of: transmitting, by said transceiver, a first electromagnetic transmit signal and propagating said first electromagnetic transmit signal towards a surface of said product using said propagating device; receiving, by said transceiver, a first electromagnetic echo signal resulting from reflection at at least one impedance transition encountered by said first electromagnetic transmit signal; determining, by said processing circuitry, a present echo characteristic value based on said first electromagnetic echo signal; and comparing, by said processing circuitry, said present echo characteristic value and a stored echo characteristic value, wherein said method further comprises the steps of: if a difference between said present echo characteristic value and said stored echo characteristic value is determined by said processing circuitry to be greater than a predefined value: if a difference between said present echo characteristic value and said stored echo characteristic value is determined by said processing circuitry to be less than said predefined value: