Fill level reflectometer having a variable measurement sequence
AssigneeVEGA Grieshaber KG
InventorsRoland Welle, Karl Griessbaum
Life of this patent
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Abstract
A fill level radar device for fill level measurement in accordance with the reflectometer method is provided, including a control circuit that is designed for changing the number of steps, the frequency spacings between the individual steps, the durations of the individual steps, the width of the frequency band, the frequency of the lowest step and/or the frequency of the highest step. The operating sequence can be optimised thereby.
Claims8
A fill level measurement device for fill level measurement in accordance with a reflectometer method, the device comprising:
- a signal source assembly configured to generate an electromagnetic transmission signal during a fill level measurement phase,
- wherein the electromagnetic transmission signal is frequency-modulated in steps,
- wherein each step of said steps has a constant frequency over a period of time that is more than twice that of a delay time of the electromagnetic transmission signal from the signal source assembly to a filling material, and
- wherein individual constant frequencies of the electromagnetic transmission signal are distributed within a defined frequency band;
- and
- a control circuit configured to change a number of the steps, frequency spacings between individual steps, durations of the individual steps, a width of the defined frequency band, a frequency of a lowest step, or a frequency of a highest step,
- wherein steps in a central region of the defined frequency band of the electromagnetic transmission signal last longer than steps in edge regions of the defined frequency band of the electromagnetic transmission signal.
A method for fill level determination in accordance with a reflectometer method, comprising the following steps:
- starting a fill level measurement phase;
- generating an electromagnetic transmission signal during the fill level measurement phase,
- wherein the electromagnetic transmission signal is frequency-modulated in steps,
- wherein each step of said steps has a constant frequency over a period of time that is more than twice that of a delay time of the electromagnetic transmission signal from the signal source assembly to a filling material, and
- wherein individual constant frequencies of the electromagnetic transmission signal are distributed within a defined frequency band;
- determining the fill level from data acquired during the fill level measurement phase;
- changing a number of the steps, frequency spacings between individual steps, durations of the individual steps, a width of the defined frequency band, a frequency of a lowest step, or a frequency of a highest step,
- wherein steps in a central region of the defined frequency band of the electromagnetic transmission signal last longer than steps in edge regions of the defined frequency band of the electromagnetic transmission signal.
Dependencies are inferred from the claim text.