Apparatus for Determining Fill Level by Means of a Helical Antenna
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United States of America Patent
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Issued Date -
Nov 13, 2014
app pub date -
Apr 28, 2014
filing date -
May 7, 2013
priority date (Note) -
Abandoned
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Abstract
Apparatus for determining or monitoring fill level of a fill substance in a container, comprising: at least two antennas, wherein a first antenna transmits electromagnetic waves in the direction of the surface of the fill substance and a second antenna receives reflected waves; and at least one evaluation unit, which ascertains fill level in the container based on travel-time difference of transmitted and reflected electromagnetic waves, characterized in that the antennas are helical antennas, in order to transmit, respectively to receive, circularly polarized electromagnetic waves and the evaluation unit detects a rotational direction change between the transmitted wave and the reflected wave.
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