Magnetic Inductive Flowmeter Coil Cable Routing
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Solution Overview
Problem
Magnetic-inductive flowmeters face measurement errors due to improper cable routing, which affects the accuracy and reliability of flow measurements.
Innovation Solution
The magnetic-inductive flowmeter incorporates a coil assembly with recesses for cable guidance, routing cables parallel to the magnetic field and using a fastening element with a form-fitting connection to secure the coil core, ensuring symmetric and reliable cable routing, minimizing protrusion and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If cables are routed through the coil assembly without guidance structures, then the device complexity is reduced, but measurement precision deteriorates due to improper cable routing
Solution Approach 1:
The patent applies preliminary action by pre-configuring cable guidance structures (recesses and grooves) in the coil core before cable installation. These structures are formed during manufacturing, so that when cables are later routed through the assembly, they automatically follow the correct path parallel to the magnetic field. This eliminates the need for complex external cable management systems while ensuring measurement accuracy.
Solution Approach 2:
The patent introduces intermediary structures (recesses and grooves in the coil core) that mediate between the cables and the magnetic field environment. These intermediary features guide the cables through the coil assembly in a controlled manner, preventing them from cutting across magnetic field lines while maintaining a relatively simple overall device structure.
2Measurement precision
If cable strands are routed perpendicular to the magnetic field, then cable installation is simplified, but measurement precision deteriorates due to induced interference voltages
Solution Approach 1:
The patent applies local quality by creating specific localized features (recesses and grooves) in the coil core where cables are routed. These localized guidance structures ensure that in the critical region of the coil assembly, cables follow the correct path parallel to the magnetic field, while allowing flexibility elsewhere in the system for easy cable installation and maintenance.
3Measurement precision
If cable strands protrude significantly from the sectional plane, then ease of operation improves for cable connection, but measurement precision deteriorates due to increased interference
Solution Approach 1:
The patent applies dimensionality change by routing cables through recesses that extend in the longitudinal direction of the coil core, rather than allowing them to protrude laterally from the sectional plane. This three-dimensional cable management approach keeps cables confined within the coil assembly structure, minimizing interference with the magnetic field while maintaining cable accessibility for connection purposes.
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 configuration improves measurement performance by reducing measurement errors, allowing for more accurate flow determination and faster sampling rates while maintaining secure cable management.
Implementation Method 1
Electromagnetic flowmeters use the principle of electrodynamic induction for volumetric flow measurement
Implementation Method 2
Charge carriers in the medium moving perpendicularly to a magnetic field induce a measuring voltage in measuring electrodes
Data Source
Figure 1~2a
Figure 3
Figure 4
AI summary
The invention discloses a magnetic inductive flowmeter for determining the flow rate of a measurement medium through a measuring tube (6) with a measuring tube axis (A), having at least one first coil assembly (1) with a coil body (2) for accommodating a coil core (3) of a coil (4), wherein the coil (4) is wound onto the coil body (2), and wherein the coil core (3) is arranged in a first opening (5) of the coil body (2) with a longitudinal axis of the coil core (3) coaxial to the coil (4), wherein at least two cable harnesses (15 a and 15 b) are arranged between the coil core (3) and the coil body (2), wherein the cable harnesses (15 a and 15 b) are used to tap off the signals at two or more measuring electrodes arranged on the measuring tube (6), wherein the cable harnesses (15 a and 15 b) run substantially along a sectional plane (40) inside the coil assembly (1) according to the invention, which sectional plane (40) runs perpendicular to the measuring tube axis (A).