Stacked Magnetic Field Sensor Arrangement for Compact Reliability
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Solution Overview
Problem
Existing magnetic field sensor arrangements face challenges in achieving high reliability and accuracy while maintaining a compact design, particularly when multiple sensors are used in close proximity, which can lead to reduced accuracy due to suboptimal magnet placement and increased space requirements.
Innovation Solution
A stacked magnetic field sensor arrangement featuring two magnetic field sensor bodies with parallel main surfaces, each equipped with magnetic field sensitive elements, allowing for redundant measurement and increased reliability, with optional inclusion of semiconductor materials and evaluation circuits for enhanced sensitivity and signal processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two magnetic field sensors are placed alongside each other to improve reliability, then reliability is improved, but space requirement increases and accuracy is reduced due to suboptimal magnet placement
Solution Approach 1:
The patent transitions from a planar arrangement of sensors to a three-dimensional stacked configuration. Multiple magnetic field sensor bodies are arranged vertically along the magnetic field direction, allowing redundant sensing while maintaining a compact footprint. This vertical stacking enables reliable operation with reduced lateral space requirements compared to side-by-side sensor placement.
2Reliability
If two magnetic field sensors are placed alongside each other to improve reliability, then reliability is improved, but accuracy is reduced due to suboptimal magnet placement
Solution Approach 1:
By stacking sensors vertically along the magnetic field direction rather than placing them laterally, each sensor can be optimally positioned relative to the magnet. This three-dimensional arrangement allows each sensor body to achieve ideal magnet placement for accurate measurement while providing redundant sensing capability for improved reliability.
3Area of stationary object
If magnetic field sensor bodies are stacked vertically to reduce space requirements, then space requirement is reduced, but device complexity increases
Solution Approach 1:
The patent combines multiple magnetic field sensor bodies into a single integrated stacked arrangement. The sensor bodies are positioned along the magnetic field direction with their sensitive elements oriented to detect the magnetic field vector, creating a unified compact sensor unit that reduces overall space requirements while maintaining functional simplicity through standardized configuration.
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 stacked arrangement enhances reliability and accuracy by providing redundant magnetic field measurements, reduces space requirements, and allows for compact installation in applications with limited space, while protecting sensitive elements and circuitry from mechanical stress.
Implementation Method 1
the first and/or the second magnetic field sensitive element are built as a Hall structure
Implementation Method 2
the first and/or the second magnetic field sensitive element can be designed to use the magneto-resistive effect
Data Source
AI summary
A magnetic field sensor arrangement (4) comprises a stacked arrangement (1) with a first magnetic field sensor body (20) and a second magnetic field sensor body (40). The first magnetic field sensor body (20) has a first main surface (21), on which is arranged a first magnetic field sensitive element (23), and a second main surface (22), which is approximately parallel to the first main surface (21). The second magnetic field sensor body (40) has similarly a first main surface (41), on which is arranged a second magnetic field sensitive element (43), and a second main surface (42), which is approximately parallel to the first main surface (41).