Microwave Level Gauge In-Line Calibration Using External Reflection Points
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Solution Overview
Problem
Existing microwave-based filling level measuring devices require calibration and verification processes that cannot be performed while the system is in operation, necessitating downtime and disrupting ongoing processes.
Innovation Solution
A filling level measuring device and method that incorporates reflection points outside the container, utilizing impedance jumps to generate echo signals for in-line calibration and verification, allowing the device to remain operational during the process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If calibration and verification are performed using existing microwave-based filling level measuring devices, then measurement accuracy is improved, but system downtime occurs and continuous operation is disrupted
Solution Approach 1:
The calibration and verification processes are performed in advance using reflection points that are already integrated into the probe structure. The reflection points are pre-positioned at known locations along the probe, allowing the system to establish reference echo signals before actual filling level measurements begin, thereby eliminating the need for separate calibration downtime.
Solution Approach 2:
Reflection points are introduced as intermediary elements along the probe structure. These reflection points generate distinct echo signals that serve as reference markers for calibration and verification purposes. The reflection points act as mediators between the transmit signal and the filling material echo, enabling accurate measurement without requiring system shutdown.
2Productivity
If calibration is performed with the system in operation (in-line calibration), then continuous operation is maintained, but calibration accuracy may be compromised without proper reference points
Solution Approach 1:
Reflection points serve as intermediary reference elements that provide stable, known reflection positions for calibration purposes. These reflection points generate consistent echo signals that can be used to verify the accuracy of filling level measurements even when the system is operating continuously with filling material present in the container.
Solution Approach 2:
The system uses echo signals from the reflection points as feedback references to continuously verify and adjust measurement accuracy. By comparing the received echo signals from known reflection point positions against expected values, the system can perform self-verification and maintain calibration accuracy during continuous operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables calibration and verification of filling level measurements without system downtime, ensuring continuous operation and improved accuracy through multi-point calibration and verification.
Implementation Method 1
microwave-based determination of the filling level
Implementation Method 2
A filling material echo signal is generated by means of reflection of the transmit signals at a surface of the filling material
Implementation Method 3
utilizing impedance jumps to generate echo signals for in-line calibration and verification
Data Source
AI summary
A filling level measuring device for the microwave-based determination of the filling level of a filling material in a container includes at least one reflection point arranged outside the container. The reflection point generates a reflection point echo signal by means of reflection of a transmit signal, wherein an electronics unit calibrates and/or verifies a filling material echo signal in-line based upon the at least one reflection point echo signal. Further disclosed is a method for the in-line calibration and/or verification of a filling level measuring device.