Electromagnetic Flowmeter Compound Coil Design
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Solution Overview
Problem
Conventional electromagnetic flowmeters require two coils mounted on top and bottom of a conduit, which increases material cost and weight while compromising compactness and signal strength, necessitating a more efficient coil configuration for reduced material usage without sacrificing performance.
Innovation Solution
A compact electromagnetic flowmeter design featuring a single compound coil configuration where two coils share a surface area, with the inner coil positioned within the outer coil, maintaining signal strength and performance while reducing material usage, and allowing for additional coil sets for enhanced accuracy and sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two coils are mounted on top and bottom of the conduit, then signal strength is adequate for measurement purposes, but material cost and weight increase
Solution Approach 1:
The patent combines two separate coils into a single compound coil structure where the first and second coils are mounted adjacently on the same surface of the conduit. This merging approach maintains the electromagnetic field generation capability and signal strength while reducing the total number of coil components, thereby decreasing material usage and weight compared to having two separate coils mounted on opposite sides of the conduit.
Solution Approach 2:
The patent implements a nested coil configuration where the second coil is positioned within or adjacent to the first coil on the same conduit surface. This nesting arrangement allows the coils to share space and structural support, reducing the overall footprint and material requirements while maintaining the electromagnetic field distribution needed for adequate signal generation.
2Reliability
If two coils are mounted on top and bottom of the conduit, then signal strength is adequate for measurement purposes, but the flowmeter becomes less compact
Solution Approach 1:
By merging two coils into a single compound coil structure mounted on the same conduit surface, the patent reduces the spatial distribution of coil components. This consolidation eliminates the need for separate mounting locations on opposite sides of the conduit, thereby reducing the overall volume and improving compactness while maintaining adequate signal strength.
Solution Approach 2:
The patent transitions from a distributed coil arrangement across opposite sides of the conduit (three-dimensional spread) to a concentrated compound coil structure on a single surface (two-dimensional consolidation). This dimensional change reduces the flowmeter's overall footprint and volume while preserving electromagnetic field generation capability.
3Loss of substance
If a single coil is used instead of two coils, then material cost is reduced, but signal strength and compactness are compromised
Solution Approach 1:
The patent merges two coils into a single compound coil structure, which reduces material cost compared to having two separate coils while maintaining signal strength through the combined electromagnetic field generation capability of the compound structure.
Solution Approach 2:
The compound coil structure serves multiple functions simultaneously: it generates the electromagnetic field for flow measurement, provides structural support for both coil windings, and reduces overall component count. This multi-functionality allows the single compound coil to replace two separate coils, reducing material cost while maintaining performance.
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 compound coil configuration achieves comparable performance to dual-coil setups with reduced material consumption, offering a cost-effective and compact solution for fluid flow measurement with minimal impact on signal strength or accuracy.
Implementation Method 1
A typical electromagnetic flowmeter works on Faraday's law of electromagnetic induction. An electromagnetic field is imposed within a flow pipe having a flow of fluid with a certain level of conductivity. Electromotive force (EMF) induced as a result of the interaction of the electromagnetic field with fluid molecules (ions in the fluid), is measured using electrodes provided at the pipe side walls.
Data Source
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AI summary
The present invention relates to an electromagnetic flowmeter. The present invention provides an electromagnetic flowmeter for measuring flow of fluid flowing in a conduit of the electromagnetic flowmeter, wherein the electromagnetic flowmeter comprises: a pair of electrodes mounted on the conduit for measuring potential difference generated by the interaction of electromagnetic field in the fluid to determine the flow of fluid in the electromagnetic flowmeter; a processing unit, wherein the processing unit acquires signals from the pair of electrodes and processes the signal for measurement, a set of coils comprising at least two coils mounted on a surface of the conduit and excited by an excitation unit for generating an electromagnetic field, wherein a first coil from the set of coils is concentrically positioned with a second coil from the set of coil, and the second coil is placed within the enclosed surface area of the first coil.