XMR Sensor Orientation for Magnetic Sensitivity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional rotation sensors with XMR-sensors face issues due to magnetic field components in orthogonal directions causing magnetization rotation and discontinuous resistance jumps, leading to potential malfunction.
Innovation Solution
The arrangement of XMR-sensors to detect magnetic field components in specific perpendicular directions prevents unwanted magnetization rotation, ensuring continuous operation by placing the sensor die surface parallel to the y-z plane, thereby avoiding rotational magnetic fields and reducing assembly and manufacturing tolerances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If XMR-sensors are arranged to detect magnetic field components in orthogonal directions, then magnetic sensitivity is improved, but magnetization rotation and discontinuous resistance jumps occur causing malfunction
Solution Approach 1:
The patent applies asymmetry by orienting the sensor die surface parallel to the y-z plane rather than symmetrically in all directions. This asymmetric orientation ensures that the magnetization direction of the XMR-sensors remains aligned with the magnetic field gradient, preventing unwanted magnetization rotation and discontinuous resistance jumps while maintaining high magnetic sensitivity.
Solution Approach 2:
The patent changes the spatial parameter of sensor orientation by positioning the sensor die surface parallel to the y-z plane. This parameter change in orientation ensures that the magnetic field components detected are in perpendicular directions without causing magnetization rotation, thereby resolving the contradiction between sensitivity and operational continuity.
2Manufacturing precision
If sensor die surface is placed parallel to the y-z plane, then assembly and manufacturing tolerances are reduced, but sensor complexity increases
Solution Approach 1:
The asymmetric orientation of the sensor die surface parallel to the y-z plane simplifies the manufacturing process by providing a clear reference plane for assembly. This reduces assembly tolerances and manufacturing complexity compared to more complex three-dimensional sensor configurations that would require multiple orientation adjustments.
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 magnetic sensitivity, reduces sensor complexity and cost, and prevents discontinuous resistance jumps, ensuring accurate and reliable position, velocity, and acceleration measurements.
Implementation Method 1
The magnetic field sensor is configured to detect components of the magnetic field in a second direction and in a third direction, wherein the magnetic field sensor is arranged adjacent to the body such that the second direction is perpendicular to the first direction and such that the third direction is perpendicular to the first direction and to the second direction
Data Source
AI summary
The present invention is directed to a sensor with a body and a magnetic field sensor. The body includes a plurality of structures arranged in a first direction to effect a periodically varying magnetic field upon movement of the body in the first direction. The magnetic field sensor is configured to detect components of the magnetic field in a second direction and in a third direction, wherein the magnetic field sensor is arranged adjacent to the body such that the second direction is perpendicular to the first direction and such that the third direction is perpendicular to the first direction and to the second direction.