Coriolis Sensor Asymmetry Stabilization
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Solution Overview
Problem
Coriolis measurement devices face challenges in stabilizing measured values related to sensor asymmetry deviations, which can lead to noisy measurement variables due to manufacturing inaccuracies.
Innovation Solution
A method is introduced to stabilize the measured values of sensor asymmetry by creating an asymmetric sequence of values based on the amplitudes of measured voltages and using a stabilization variable, such as resonant frequency or temperature differences, to adjust and stabilize these values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensors are used to measure vibrations in the Coriolis measurement device, then measurement of density and mass flow is enabled, but manufacturing inaccuracies cause sensor asymmetry leading to noisy measurement variables
Solution Approach 1:
The patent applies preliminary action by performing initial calibration of the sensors to determine asymmetry characteristics before actual measurement. The system pre-calculates correction factors based on the asymmetric response of sensors at zero flow conditions, and applies these corrections in advance to subsequent measurements, thereby eliminating the noise caused by manufacturing inaccuracies.
2Measurement precision
If initial calibration is performed to correct sensor asymmetry, then zero-flow measurement accuracy is improved, but the measurement variable representing deviations from calibration becomes very noisy
Solution Approach 1:
The patent implements feedback by continuously monitoring the asymmetric response of sensors and comparing it against the pre-determined calibration characteristics. The system dynamically adjusts the measurement values based on the deviation from expected asymmetric behavior, using feedback loops to filter out noise and maintain stable measurements even when operating conditions change from the calibration state.
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
The method effectively stabilizes the asymmetric sequence of values, reducing noise and improving the accuracy of density and mass flow measurements in Coriolis measurement devices.
Implementation Method 1
the coil device and the magnetic device of each sensor are moved relative to one another by measuring tube vibrations, during which an electrical measured voltage is induced in the coil
Data Source
AI summary
A method for operating a Coriolis measurement device comprises the following steps: recording the measured voltages of sensors for sensing measuring tube vibrations and creating an asymmetric sequence of values by way of the amplitudes of the measured voltages for the purpose of diagnosing the Coriolis measurement device, recording at least one stabilization variable and creating a stabilized asymmetric sequence of values based on the stabilization variable, wherein the stabilization variable is one of the following variables or a first or further temporal derivative thereof: a resonant frequency of the measuring tube containing medium or a variable derived therefrom, time or phase difference between measurement signals from the first sensor and the second sensor or a variable derived therefrom, temperature of the measuring tube wall, temperature difference between two measurement points of the measuring tube wall.