Electromagnetic Flow Meter Magnetic Circuit Verification
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Solution Overview
Problem
Existing electromagnetic flow meters face challenges in real-time verification of operation states, particularly in detecting issues with the magnetic circuit, which requires disassembly for visual inspection, making it difficult to assess the balancing property of magnetic flux distribution.
Innovation Solution
A system comprising comparing modules that evaluate parameters such as zero adjustment value, electrode potential, electrode wetted portion resistance, and exciting current against threshold values, and a determining module that determines the operation state of blocks like the magnetic circuit block in real time, allowing for acceptance or rejection of operation verification without disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If visual inspection of magnetic circuit is performed, then magnetic circuit abnormality can be detected, but the flow meter must be detached and disassembled making real-time verification difficult
Solution Approach 1:
The patent replaces the mechanical disassembly process with an electrical measurement system. By measuring electrical parameters (exciting current, electrode potentials, zero adjustment values) through electrical connections already present in the installed flow meter, the system substitutes the need for mechanical detachment and visual inspection, enabling real-time verification without physical disassembly.
Solution Approach 2:
The patent introduces electrical parameters as intermediaries to indirectly assess the magnetic circuit state. Instead of directly observing the magnetic circuit through disassembly, the system uses measurable electrical quantities (exciting current, electrode potentials, zero adjustment values) as mediators that reflect the magnetic circuit's operational status, allowing verification while the device remains installed.
2Reliability
If multiple parameters are monitored to verify operation state, then verification accuracy is improved, but system complexity increases
Solution Approach 1:
The patent makes existing components serve multiple functions. The exciting coil not only generates the magnetic field for flow measurement but also serves as a test object for verifying its own operational state through exciting current measurement. The electrodes serve both their primary measurement function and provide potential difference measurements for magnetic circuit verification. This multi-functionality improves verification reliability without adding separate dedicated verification hardware.
Solution Approach 2:
The patent implements a feedback mechanism where multiple electrical parameters (exciting current, electrode potentials, zero adjustment values) are continuously measured and compared against reference values or thresholds. The comparison results provide feedback about the magnetic circuit's operational state, enabling automatic detection of abnormalities. This feedback system integrates seamlessly with the existing measurement electronics, avoiding significant complexity increase while improving verification reliability.
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 real-time verification of electromagnetic flow meter operations, including the magnetic circuit block, improving measurement stability and accuracy by identifying abnormalities without the need for physical disassembly, thus facilitating more reliable and efficient monitoring.
Implementation Method 1
an exciting current is supplied to an exciting coil provided in the flow meter to generate a magnetic field in a pipe
Implementation Method 2
fluid is allowed to flow in the magnetic field so that an electromotive force proportional to a flow velocity generated in accordance with the Faraday's electromagnetic induction law is detected in an electrode
Data Source
AI summary
A system of verifying an operation of an electromagnetic flow meter, includes a plurality of comparing modules configured to compare a plurality of parameters respectively obtained from modules of the electromagnetic flow meter with threshold values respectively, to output compared results, and a determining module configured to determine in real time an operation state of a block in the electromagnetic flow meter based on at least one of the compared results output from the plurality of comparing modules.