Coriolis Sensor Magnet Holder for Localized Magnetic Field
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Solution Overview
Problem
Coriolis measuring devices face reduced sensitivity due to blurred transitions in magnetic fields, affecting the detection of measuring tube vibrations.
Innovation Solution
A Coriolis measuring sensor with a U-shaped magnet holder and two opposing magnets, where the magnet groups are positioned to create a spatially localized, inhomogeneous magnetic field by using a magnetically conductive closing device and ceramic adhesive for secure fixation, enhancing sensor sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a U-shaped magnetic field-generating element is used, then the sensor can detect measuring tube vibrations, but the magnetic field exhibits a blurred transition to a region without magnetic field, resulting in lower sensitivity
Solution Approach 1:
The patent applies local quality by creating a spatially localized magnetic field through two opposing magnets positioned at specific locations on the U-shaped holder. The magnets are arranged to generate a magnetic field that is concentrated and sharply defined in the region of interest, avoiding the blurred transition characteristic of conventional single-element designs. This localized field configuration enhances sensor sensitivity by providing a clear, well-defined magnetic field boundary.
2Measurement precision
If two opposing magnets are used to create a localized magnetic field, then sensor sensitivity increases, but the device complexity increases
Solution Approach 1:
The patent merges the two opposing magnets into a single integrated U-shaped holder structure. The holder serves as both the mounting structure for the magnets and part of the magnetic field-generating assembly. This merging approach, combined with the use of a 3D-printed holder that can be manufactured as a single piece, reduces the number of separate components and simplifies assembly while maintaining the benefits of having two opposing magnets for enhanced sensitivity.
3Stability of the object's composition
If magnets are securely fixed in cavities using adhesive, then the magnetic field remains stable during vibrations, but the manufacturing process becomes more complex
Solution Approach 1:
The patent applies preliminary action by pre-forming cavities in the U-shaped holder that are specifically designed to receive and secure the magnets. These cavities are prepared in advance during the manufacturing process, allowing for straightforward magnet installation. The cavities are positioned and dimensioned to work with the magnet geometry, enabling secure fixation through adhesive application without requiring complex assembly procedures or additional fastening mechanisms.
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 solution increases sensor sensitivity by producing a highly localized magnetic field, allowing for precise detection of measuring tube vibrations and inducing strong electrical voltages during relative movements.
Implementation Method 1
at least one exciter and/or at least one sensor each comprise a coil device with at least one coil and a magnet device
Implementation Method 2
the magnet device comprises a holder for magnets and at least a first group of magnets with at least one magnet and at least a second group of magnets with at least one magnet
Data Source
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Figure 2
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AI summary
The invention relates to a Coriolis sensor (10), comprising: at least one measurement tube (11) which has an inlet (11.1) and an outlet (11.2); at least one exciter (12); at least two sensor elements (13); wherein at least one exciter and/or at least one sensor element each have a coil arrangement (14) and a magnet arrangement (15); wherein the magnet arrangement has a retainer for magnets and at least one first magnet group and at least one second magnet group; wherein the retainer has a U shape with a first arm, a second arm and a base connecting the arms, the retainer engaging around the coil arrangement; wherein the first magnet group is retained by the retainer on the first side of the coil arrangement, and the second magnet group is retained by the retainer on the second side of the coil arrangement; characterized in that the retainer has a cavity in the region of each of the arms, each cavity being formed by a cavity wall, each cavity wall having at least one first opening for receiving a magnet group, and the retainer being produced in particular by means of a 3D printing process.