Coriolis Flowmeter Multiplexer Position Verification
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Solution Overview
Problem
Conventional Coriolis mass flow meters require suspension of measurement operations to check the operating positions of multiplexers, leading to operational restrictions.
Innovation Solution
Phase-shift the first oscillation signal by a significant amount, such as 180°, and compare the phase difference with the actual phase shift to determine if multiplexers are in the correct operating position without interrupting the measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional multiplexer checking method is used, then operating position verification is achieved, but measurement operation must be suspended
Solution Approach 1:
The patent applies preliminary action by introducing a test signal before actual measurement to verify multiplexer operating positions. The test signal is fed through the multiplexers before switching to measurement mode, allowing verification of correct operating positions without interrupting subsequent measurement operations. This preliminary verification step ensures reliability while maintaining productivity.
Solution Approach 2:
The patent uses a test signal as an intermediary to verify multiplexer operating positions. Instead of directly checking the measurement signal path which would interrupt measurement, a separate test signal is introduced as a mediator to perform the verification function. This intermediary approach allows operating position confirmation without affecting the continuity of actual measurement operations.
2Measurement precision
If measurement operation is suspended for multiplexer checking, then operating position accuracy is ensured, but operational efficiency deteriorates
Solution Approach 1:
The patent implements periodic action by continuously or regularly introducing test signals to verify multiplexer operating positions during operation. Rather than suspending measurement for verification, the system periodically checks operating positions using test signals while measurement continues. This periodic verification maintains measurement precision while minimizing time loss by not interrupting the measurement flow.
Solution Approach 2:
The patent applies continuity of useful action by maintaining measurement operations continuous while performing multiplexer verification in parallel using test signals. The verification process occurs concurrently with measurement rather than sequentially, ensuring that the useful measurement action continues without interruption. This approach preserves both measurement precision and operational efficiency.
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 simultaneous detection of multiplexer operating positions during ongoing measurements, enhancing operational efficiency by avoiding interruptions.
Implementation Method 1
The mass flow of a medium through the measuring tube is determined by using the Coriolis effect. For this purpose, the measuring tube through which the medium flows is set into oscillation by at least one oscillation generator
Data Source
AI summary
A method for operating a Coriolis mass flow meter that has at least one measuring tube. A medium can flow through the measuring tube and an oscillation generator excites the measuring tube to oscillate. A first and second oscillation sensors capture the oscillations of the measuring tube on the inlet side and on the outlet side and provide them as a first oscillation signal and as a second oscillation signal. In order to be able to continue the measurement operating position of the first multiplexer and the second multiplexer at the same time as the test for the simultaneous measurement operating position, the first oscillation signal is phase-shifted by a phase shift and the phase-shifted first oscillation signal is transmitted at least indirectly to a control and evaluation unit.