Electromagnetic Flow Transducer Layout for 2D Velocity Sensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electromagnetic transducers are unable to simultaneously measure multiple velocity components of electrically conductive fluids, particularly dense and high-temperature fluids, in large volumes, due to interference and complexity in processing signals.
Innovation Solution
An electromagnetic transducer with a metallic cylindrical core and strategically arranged receiving coils or Hall effect sensors measures two-dimensional velocity components by minimizing interference through diametrically opposed configurations, suitable for alternating or direct current operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple electromagnetic transducers are used to measure multiple velocity components, then measurement capability is improved, but device complexity and signal interference increase
Solution Approach 1:
The patent combines multiple velocity measurement capabilities into a single electromagnetic transducer by arranging multiple receiving coils (first, second, third, and fourth coils) around a common core. This allows simultaneous measurement of multiple velocity components (vx, vy, vz) at one location, eliminating the need for multiple separate transducers and reducing overall system complexity despite enhanced measurement capability
Solution Approach 2:
The patent transitions from measuring single velocity components to measuring two-dimensional velocity components (vx and vy) simultaneously by adding receiving coils arranged in different spatial orientations (diametrically opposed pairs). This dimensional expansion in measurement capability is achieved through strategic coil placement rather than adding multiple independent transducers
2Measurement precision
If receiving coils are arranged to measure multiple velocity components, then measurement capability is improved, but signal interference between measurements increases
Solution Approach 1:
The patent uses diametrically opposed coil arrangements where coils are positioned at specific angular intervals (e.g., 90 degrees apart) around the core. This asymmetric yet balanced configuration allows differential measurement techniques that cancel out interference signals while preserving the velocity component signals, enabling simultaneous multi-component measurement with reduced cross-talk
Solution Approach 2:
The patent extracts and separates different velocity component signals from the combined electromagnetic responses by using specifically oriented receiving coils. Each coil pair is tuned to detect specific velocity components (vx, vy, or vz) while being insensitive to others, effectively filtering out interfering signals through geometric arrangement and signal processing
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 measurement of two-dimensional velocity components in electrically conductive fluids, suitable for dense and high-temperature fluids, without the need for additional transducers and with less complex signal processing.
Implementation Method 1
an electric coil, called primary coil, wound around the central portion of the tube
Implementation Method 2
or four Hall effect sensors, each arranged on one of the flat surfaces
Data Source
Figure 1~2A
Figure 3~5A
Figure 5B~6
AI summary
The invention relates to an electromagnetic transducer (10), intended to measure the two-dimensional velocity components of a flow of an electrically conductive fluid, comprising: - a metallic cylindrical tube (11) forming a core with high magnetic permeability, which extends along a central axis (Z), comprising a central portion and two end portions, on either side of the central portion, each comprising a number of two bosses (13.1 to 13.4), diametrically opposed to each other with respect to the central axis (Z) and each delimiting a flat surface, parallel to the central axis (Z), - an electric coil (12), called the primary coil, wound around the central portion of the tube, - a number of four electric coils (14.1 to 14.6), called receiver coils, each wound around one of the flat surfaces, or four Hall effect sensors, each arranged on one of the flat surfaces.