Magnetic Detection Device With Intermediary Plate
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Solution Overview
Problem
The magnetic detection device has low sensitivity due to position-dependent magnetic fields applied to magneto-electric conversion elements, resulting in smaller changes in magnetic field intensity detected by the first element compared to the second element, leading to reduced overall detection sensitivity.
Innovation Solution
The magnetic detection device includes a magnet portion, a plurality of magneto-electric conversion elements, and a magnetic plate where the magneto-electric conversion elements are overlaid along the magnetization direction of the magnet portion, and the magnetic plate is positioned to intersect with the magnetization direction, ensuring the magnetic field applied to each element aligns with the magnetism sensing direction, thereby increasing the angular difference and change in magnetic field intensity detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If magneto-electric conversion elements are arranged at different positions relative to the magnet portion, then the magnetic field direction varies by position, but the detection sensitivity decreases due to smaller angular differences in magnetic field changes
Solution Approach 1:
A magnetic plate is introduced as an intermediary component between the magnet portion and the magneto-electric conversion elements. The magnetic plate has a longitudinal direction that intersects with the magnetization direction, serving to redirect and align the magnetic field lines. This intermediary structure ensures that magnetic field lines pass perpendicularly through both the magnetic plate and the magneto-electric conversion elements, maximizing the angular difference and detection sensitivity without requiring complex repositioning of the elements.
Solution Approach 2:
The invention changes the orientation parameter of the magnetic field path by introducing the magnetic plate at a specific angle (intersecting with the magnetization direction). This parameter change transforms the magnetic field orientation from a diagonal path (which produced smaller angular differences) to a perpendicular path through the magneto-electric conversion elements (which produces maximum angular difference and sensitivity).
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 the detection sensitivity of the magnetic detection device by correcting the magnetic field orientation to increase the change in magnetic field intensity sensed by each magneto-electric conversion element, improving the device's ability to detect magnetic field changes.
Implementation Method 1
The magnetic detection device is configured to detect change in the magnetic field acting on the magneto-electric conversion element by converting change in resistance of the plurality of magneto-electric conversion elements into change in voltage
Implementation Method 2
The magnetic plate has a longitudinal direction that intersects with the magnetization direction... ensuring the magnetic field applied to each element aligns with the magnetism sensing direction
Data Source
AI summary
A magnetic detection device includes a magnet portion, a plurality of magneto-electric conversion elements, and a magnetic plate. Plurality of magneto-electric conversion elements are overlaid on magnet portion along a magnetization direction of magnet portion. Magnetic plate is overlaid on plurality of magneto-electric conversion elements along the magnetization direction. A magnetism sensing direction of plurality of magneto-electric conversion elements intersects with the magnetization direction. Magnetic plate has a longitudinal direction that intersects with the magnetization direction.