Patent ID: 9534944
Date: 2017-01-03
CPC Classifications: G01F,G01S

Claim:
1. A method for determining and/or monitoring fill level of a medium in a container with a measuring device, which works according to the travel time measuring method, comprising the steps of: transmitting measurement signals toward the medium and reflected on a surface of the medium as wanted echo signals or on a surface of a disturbing element as disturbance echo signals and are received, from the high-frequency total measurement signal, composed by superimposing the transmitted measurement signals, the reflected wanted echo signals and the disturbance echo signals, by a sequential sampling, a low-frequency, intermediate frequency signal is produced, from the intermediate frequency signal at least one raw echo curve or digitized envelope curve dependent on travel time or travel distance is ascertained; ascertaining the wanted echo signals and/or the disturbance echo signals in the raw echo curve or the digitized envelope curve based on an ideal echo curve, which shows the amplitude of the echo signals of an ideal reflector as a function of the distance from the ideal reflector; and based on the ascertained wanted echo signal the fill level is determined.