Method for operating a vibronic sensor
AssigneeEndress + Hauser GmbH + Co. KG
InventorsKaj Uppenkamp, Armin Wernet, Christian Strittmatter
Life of this patent
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Abstract
A method for determining and/or monitoring a predeterminable fill level of a medium in a container using a vibronic sensor having at least one sensor unit with a mechanically vibratable unit, comprises exciting the mechanically vibratable unit with an excitation signal to produce mechanical vibrations, and receiving the mechanical vibrations in the form of a reception signal, determining an amplitude and a frequency of the reception signal, comparing the frequency and amplitude of the reception signal with a predeterminable frequency limit value and a predeterminable amplitude limit value, and determining a reaching of the predeterminable fill level on the basis of the comparison.
Claims9
A method for determining and/or monitoring a predeterminable fill level of a medium in a container using a vibronic sensor having at least one sensor unit with a mechanically vibratable unit, the method comprising:
- exciting the mechanically vibratable unit with an excitation signal to produce mechanical vibrations;
- receiving mechanical vibrations in the form of a reception signal;
- determining an amplitude and a frequency of the reception signal;
- comparing the frequency and the amplitude of the reception signal with a predeterminable frequency limit value and a predeterminable amplitude limit value;
- determining a reaching of the predeterminable fill level on the basis of the comparison;
- and
- when the frequency of the reception signal exceeds or falls below the predeterminable frequency limit value while the amplitude of the reception signal remains constant, determining the vibratable unit is covered by a fluid.
A method for determining and/or monitoring a predeterminable fill level of a medium in a container using a vibronic sensor having at least one sensor unit with a mechanically vibratable unit, the method comprising:
- exciting the mechanically vibratable unit with an excitation signal to produce mechanical vibrations;
- receiving mechanical vibrations in the form of a reception signal;
- determining an amplitude and a frequency of the reception signal;
- comparing the frequency and the amplitude of the reception signal with a predeterminable frequency limit value and a predeterminable amplitude limit value;
- determining a reaching of the predeterminable fill level on the basis of the comparison;
- and
- when the amplitude of the reception signal exceeds or falls below the predeterminable amplitude limit value, determining the vibratable unit is covered by a foam or that a sediment is present in the medium.
Dependencies are inferred from the claim text.