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US 2026/0309603 A1Published application
Vibronic measuring device
AssigneeEndress + Hauser GmbH + Co. KG
InventorsSascha D'Angelico, Ulrich Preusch
Life of this patent
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Abstract
The invention relates to checking the functional capability of vibronic measuring devices (1). In such case, the amplitude of the excitation signals (ES1, ES2), with which a mechanically oscillatable unit (111) is excited, is changed. The checking occurs based on the received signals (RS1, RS2) received from the mechanically oscillatable unit (111).
Claims10
1-9. (canceled)
A measuring device for determining and/or monitoring a measured variable of a medium, comprising
- a vibronic sensor and a control unit,
- wherein the vibronic sensor includes a mechanically oscillatable unit and an amplifier unit,
- wherein the mechanically oscillatable unit is excitable by an electrical excitation signal having an excitation oscillation frequency and produces a received signal having a resonance oscillation frequency,
- wherein the amplifier unit is designed to produce the electrical excitation signal with a defined phase shift relative to the received signal and to excite the mechanically oscillatable unit with the electrical excitation signal,
- wherein the control unit is designed to ascertain the resonance oscillation frequency and/or an amplitude of the received signal and, based on the ascertained resonance oscillation frequency and/or the ascertained amplitude of the received signal, to determine the measured variable of the medium,
- wherein the control unit is designed to control the amplifier unit for a checking of the measuring device in such a manner that the amplifier unit produces at least two excitation signals with equal excitation oscillation frequency and different predeterminable signal strengths,
- wherein the control unit is designed to judge the sensor relative to its ability to function depending on how the amplitudes of the received signals behave as a result of the different excitation signals, and
- wherein the amplifier unit and the mechanically oscillatable unit form a closed oscillatory circuit.
5 more elements
The measuring device as claimed in 10,
- wherein the control unit is designed, to apply a relative amplitude change of the received signals for evaluating the sensor.
Dependencies are inferred from the claim text.