Magnetic Flowmeter Transmitter Compensating Pipe Disturbances
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Solution Overview
Problem
Magnetic flowmeters are susceptible to flow pipe disturbances, leading to reduced precision and accuracy due to their susceptibility to swirl and non-uniform flow conditions, especially in non-conforming installations where strict installation guidelines cannot be followed.
Innovation Solution
A magnetic flowmeter system that includes a transmitter with a signal processor capable of compensating for flow pipe disturbances by inputting the actual installation configuration, allowing for accurate flow rate measurement even in non-conforming setups, thereby improving precision and flexibility in system design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If magnetic flowmeters are installed according to strict straight-pipe installation guidelines, then measurement precision is improved, but installation cost and time increase
Solution Approach 1:
The patent changes the measurement parameters by introducing multiple measurement points (multi-point measurement) instead of single-point measurement. This allows the flowmeter to capture velocity profiles at different radial positions, enabling accurate flow measurement even in non-uniform flow conditions without requiring long straight pipe sections. The signal processor combines measurements from multiple points to calculate compensated flow rates.
2Measurement precision
If magnetic flowmeters are installed according to strict straight-pipe installation guidelines, then measurement precision is improved, but installation cost increases
Solution Approach 1:
The patent changes the measurement parameters by introducing multiple measurement points (multi-point measurement) instead of single-point measurement. This allows the flowmeter to capture velocity profiles at different radial positions, enabling accurate flow measurement even in non-uniform flow conditions without requiring long straight pipe sections. The signal processor combines measurements from multiple points to calculate compensated flow rates.
3Adaptability or versatility
If magnetic flowmeters operate in non-conforming installations with flow pipe disturbances, then installation flexibility is improved, but measurement precision deteriorates
Solution Approach 1:
The patent changes the measurement parameters by introducing multiple measurement points (multi-point measurement) instead of single-point measurement. This allows the flowmeter to capture velocity profiles at different radial positions, enabling accurate flow measurement even in non-uniform flow conditions without requiring long straight pipe sections. The signal processor combines measurements from multiple points to calculate compensated flow rates.
Solution Approach 2:
The patent implements feedback through the signal processor, which receives signals from multiple probes, processes them to determine velocity profiles, and applies compensation algorithms based on the detected flow conditions. This feedback mechanism allows the system to adapt to non-conforming installations and maintain measurement accuracy despite flow disturbances.
4Device complexity
If magnetic flowmeters are single-point measuring devices, then device complexity is reduced, but susceptibility to flow disturbances increases
Solution Approach 1:
The patent applies segmentation by dividing the measurement function into multiple independent probes positioned at different radial locations within the pipe. Instead of a single measurement point, the flowmeter uses multiple probes (at least two) to sample velocity at different positions, creating a segmented measurement approach that reduces susceptibility to local flow disturbances while maintaining relatively simple device architecture.
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 system achieves accurate flow measurement with less than 1% error in non-conforming installations, enhancing process control and reducing installation costs and time by compensating for flow pipe disturbances, thus providing greater flexibility in magnetic flowmeter installation options.
Implementation Method 1
The current source energizes the coil, in order to generate a magnetic field across the pipe section
Implementation Method 2
The probes sense an electromotive force induced by process flow through the magnetic field
Implementation Method 3
magnetic flowmeters characterize flow via Faraday's Law, which depends upon electromagnetic interactions
Data Source
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AI summary
A transmitter for a magnetic flowmeter comprises a current source, memory and a signal processor. The current source energizes the flowmeter, such that the flowmeter generates an induced electromotive force in response to a process flow. The memory stores a flow configuration that describes a flow pipe disturbance in the process flow. The signal processor determines the flow rate as a function of the induced electromagnetic force, and as a further function of the flow configuration.