Synchronizing Magnetic-Inductive Flow Meters to Eliminate Field Interference
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Solution Overview
Problem
Adjacent magnetic-inductive flow meters experience reduced measurement accuracy due to superposition of magnetic fields, leading to varying induced electrical voltages and flow rate measurements, especially under limited spatial conditions where shielding or increased distance is not feasible.
Innovation Solution
Implementing a method to synchronize the measurement processes of adjacent flow meters, where only one generates a magnetic field during measurement, and using a control apparatus with interconnected interfaces to manage synchronization signals and compensate for mutual influences, thereby maintaining measurement accuracy without the need for shielding or increased spacing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple magnetic-inductive flow meters are arranged adjacent to each other under limited space conditions, then space utilization is improved, but measurement accuracy deteriorates due to superposition of magnetic fields
Solution Approach 1:
The patent applies periodic action by implementing synchronized measurement cycles where adjacent flow meters alternately perform measurement and non-measurement phases. During each cycle, only one flow meter generates a magnetic field while others remain inactive, creating a periodic pattern that eliminates continuous magnetic field superposition and maintains measurement accuracy in adjacent arrangements
Solution Approach 2:
The patent implements preliminary action through synchronization control that coordinates the measurement timing of adjacent flow meters before measurements begin. The control apparatus pre-establishes a synchronized operation schedule where flow meters take turns performing measurements, preventing magnetic field interference from the outset rather than correcting it after interference occurs
2Measurement precision
If shielding or increased spacing is used to prevent magnetic field interference, then measurement accuracy is improved, but device complexity or spatial requirements worsen
Solution Approach 1:
The patent applies the taking out principle by extracting the magnetic field generation function from continuous operation and limiting it to specific measurement intervals. By removing the magnetic field from the system during non-measurement periods and during adjacent flow meter measurements, the patent eliminates interference without requiring physical shielding structures
Solution Approach 2:
The patent introduces a control apparatus as an intermediary that coordinates between adjacent flow meters. This mediator manages the synchronized measurement cycles and alternates magnetic field generation timing, preventing direct magnetic field interference between adjacent devices without requiring physical barriers or increased spacing
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
This approach ensures consistent and accurate flow rate measurements by minimizing the impact of mutual magnetic field influences, allowing for reliable operation of adjacent flow meters without additional costs or spatial constraints.
Implementation Method 1
According to the Faraday Law, in such a flowing medium which is permeated by a magnetic field, an electrical field intensity arises perpendicular to the flow direction of the medium and perpendicular to the magnetic field
Implementation Method 2
The electrical field intensity produced by induction in the medium can be measured, for example, by electrodes which are electrically in contact with the medium as electrical voltage
Data Source
AI summary
A method for operation of several adjacent magnetic-inductive flow meters, each of which has a measurement tube through which an electrically conductive medium flows, a magnetic field generating apparatus for permeating the medium with a magnetic field having a component perpendicular to the longitudinal axis of the measurement tube, and a measurement apparatus for measuring the voltage induced into the medium and for determining the flow rate from the induced voltage. Each flow meter has a control apparatus. In order to prevent variations of mutual influences on the flow rate measurements by the magnetic fields of adjacent flow meters, measured flow rate values from individual measurement processes and synchronous measurement processes are used to determine the mutual influences on the flow rate measurements, and influences that are free of variations are compensated by the magnetic fields of the adjacent flow meters being synchronized.