Magnetic Inductive Flowmeter Yoke Integration
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Solution Overview
Problem
Magnetic-inductive flowmeters face challenges in achieving high measurement accuracy and compact design, as existing solutions often require larger external magnetic field generating devices and struggle with optimizing field strength and homogeneity within the measurement section.
Innovation Solution
The design incorporates a measuring tube with a cross-sectional constriction, featuring an 'outer' cylindrical and 'inner' rectangular section, with magnetic coils and coil cores connected via magnetic connecting elements that protrude into the 'outer' tube, allowing yoke elements to form the measuring section and reduce installation space, enabling easier assembly and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the magnetic field generation device is designed with larger external dimensions to increase field strength and homogeneity, then measurement accuracy is improved, but the device occupies more installation space
Solution Approach 1:
The magnetic field generation device is nested within the measuring tube structure. The yoke elements are positioned inside the measuring tube, and the magnetic coils are arranged concentrically around the measuring section, creating a compact nested configuration that maximizes field strength within limited space
Solution Approach 2:
The design transitions from a conventional external magnetic field generation approach to an internal configuration where yoke elements are positioned within the measuring tube cross-section. This spatial reorganization in multiple dimensions allows optimized magnetic field distribution without increasing external dimensions
2Volume of stationary object
If the magnetic field generation device is integrated into the measuring tube to reduce installation space, then device compactness is improved, but manufacturing complexity increases
Solution Approach 1:
The magnetic field generation device is segmented into distinct functional components: yoke elements positioned at specific locations within the measuring tube, magnetic coils arranged in separate windings, and pole pieces that can be individually manufactured and assembled. This segmentation simplifies manufacturing while achieving compact integration
Solution Approach 2:
The measuring tube serves multiple functions: it contains the fluid to be measured, provides structural support, and houses the magnetic field generation components. The yoke elements simultaneously serve as magnetic flux conduits and structural elements of the measuring section, reducing the need for separate components
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 enhances measurement accuracy by increasing field strength and homogeneity, while minimizing the device's external dimensions, facilitating more precise flow rate measurements in constrained spaces.
Implementation Method 1
a magnetic field generation device for generating a magnetic field in the measuring section of the measuring tube, wherein the magnetic field generation device has at least one magnetic coil
Implementation Method 2
If the measuring medium has a minimum electrical conductivity, its charge carriers are deflected by the magnetic field as the medium flows. Electrodes arranged perpendicular to the magnetic field and the flow direction generate an electrical potential difference due to charge separation
Data Source
Figure 1
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AI summary
Described and illustrated is a magnetic-inductive flowmeter (1) with a measuring tube (2), wherein the measuring tube (2) has a measuring section (3), a magnetic field generating device (4) for generating a magnetic field in the measuring section (3) of the measuring tube (2), and two electrodes (5) arranged in the measuring section (3) of the measuring tube (2) for detecting a measuring voltage, wherein the magnetic field generating device (4) has magnetic coils (6) arranged outside the measuring section (3) of the measuring tube (2), each with a coil core (7). As the figure shows, the coil cores (7) of the magnetic coils (6) are magnetically well-conducting with respect to the magnetic flux via magnetic connecting elements (8) to two yoke elements (10), and the yoke elements (10) partially delimit the measuring section (3) of the measuring tube (2).