Magnetic Sensor Layout for Higher Sensitivity and Lower Noise
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current magnetic sensors face challenges in achieving high sensitivity due to limitations in the design of magnetic elements and the efficiency of magnetic field application, leading to reduced detection accuracy and increased noise.
Innovation Solution
The magnetic sensor design incorporates a first sensor part with a first magnetic member, a counter magnetic member, and a magnetic element featuring extending portions that overlap both members, optimizing the magnetic field application and resistance detection to enhance sensitivity and reduce noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional magnetic element design is used, then device simplicity is maintained, but sensitivity is insufficient
Solution Approach 1:
The magnetic element is divided into multiple extending portions (first extending portion, second extending portion, etc.) that extend in different directions. Each portion interacts with magnetic members independently, allowing the sensor to detect magnetic fields from multiple orientations simultaneously, thereby improving sensitivity without requiring multiple separate sensors
Solution Approach 2:
Different extending portions of the magnetic element are positioned to overlap with different magnetic members (first magnetic member, second magnetic member, third magnetic member). Each portion has optimized local geometry and positioning to maximize its interaction with the corresponding magnetic member, creating locally optimized detection zones that collectively enhance overall sensitivity
2Measurement precision
If magnetic field application efficiency is not optimized, then device complexity is reduced, but detection accuracy deteriorates
Solution Approach 1:
The magnetic element extends in multiple spatial dimensions (first direction, second direction, third direction) rather than a single direction. This multi-dimensional configuration allows the sensor to capture magnetic field information from various orientations simultaneously, improving detection accuracy by utilizing spatial dimensionality to enhance magnetic field interaction
Solution Approach 2:
The extending portions of the magnetic element are nested within the magnetic field regions generated by the magnetic members. The first extending portion is positioned within the field of the first magnetic member, the second extending portion within the field of the second magnetic member, creating a nested configuration that maximizes magnetic field coupling and detection efficiency
3Measurement precision
If conventional magnetic element configuration is used, then manufacturing is simplified, but noise increases
Solution Approach 1:
The extending portions of the magnetic element have asymmetric configurations where the first extending portion extends in a first direction, the second extending portion extends in a second direction, and their lengths and positions are deliberately made asymmetric. This asymmetric design creates differential detection capabilities that help cancel out common-mode noise while preserving signal detection, improving noise performance through geometric asymmetry
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 significantly improves the sensitivity of the magnetic sensor by efficiently applying the magnetic field and stabilizing the resistance change, resulting in higher detection accuracy and reduced noise levels.
Implementation Method 1
a magnetic element including one or a plurality of first extending portions
Data Source
AI summary
According to one embodiment of the invention, a magnetic sensor includes a first sensor part. The first sensor part includes a first magnetic member, a first counter magnetic member, and a first magnetic element. A direction from the first magnetic member to the first counter magnetic member is along a first direction. The first magnetic element includes one or a plurality of first extending portions. A first portion of the first extending portion overlaps the first magnetic member in a second direction crossing the first direction. A first counter portion of the first extending portion overlaps the first counter magnetic member in the second direction. A first direction length along the first direction of the first extending portion is longer than a third direction length along a third direction of the first extending portion. The third direction crosses a plane including the first direction and the second direction.