Dipole Magnet Hall Sensor 3D Position Measurement
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Solution Overview
Problem
Existing displacement and position measurement devices are limited to one-dimensional measurements and require large, expensive magnets with linear magnetic fields, restricting their applications and accuracy.
Innovation Solution
A device using a bar magnet with a dipole-shaped magnetic field and a three-dimensionally measuring Hall sensor system, allowing for precise two- and three-dimensional location determination, enabling the detection of distance and speed with a compact and cost-effective design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a large magnet with linear magnetic field is used, then one-dimensional position measurement is achieved, but device size and cost increase
Solution Approach 1:
The patent transitions from one-dimensional to three-dimensional position measurement by using a dipole-shaped magnetic field configuration. This allows the system to determine position in x, y, and z directions simultaneously using a single magnet and sensor arrangement, eliminating the need for multiple large magnets while improving measurement capability.
Solution Approach 2:
The patent changes the magnetic field configuration from linear to dipole-shaped by adjusting the magnet geometry and orientation. This parameter change enables three-dimensional position measurement with a compact magnet design, resolving the contradiction between measurement precision and device complexity.
2Adaptability or versatility
If a dipole-shaped magnetic field is used, then three-dimensional position measurement is enabled, but measurement range is limited
Solution Approach 1:
The patent employs dynamic evaluation of magnetic field characteristics through continuous monitoring of field strength variations. The sensor system dynamically adjusts its measurement based on the dipole field configuration, enabling accurate position determination across extended ranges by analyzing the spatial distribution of magnetic field components.
Solution Approach 2:
The patent introduces an intermediary evaluation system that processes magnetic field characteristics to extend the effective measurement range. By analyzing the dipole field pattern and its variations, the system can determine position over larger distances while maintaining three-dimensional measurement capability.
3Measurement precision
If multiple sensors are used for three-dimensional measurement, then measurement accuracy improves, but device complexity increases
Solution Approach 1:
The patent combines multiple sensing functions into a single integrated sensor system. By using a single sensor that can detect magnetic field components in multiple directions through the dipole field configuration, the system achieves three-dimensional measurement capability without requiring separate sensors for each dimension, thus reducing overall device complexity.
Solution Approach 2:
The patent creates a universal sensor system that performs multiple measurement functions simultaneously. The single sensor is designed to detect magnetic field components in x, y, and z directions by utilizing the dipole field geometry, making the sensor system multi-functional and eliminating the need for multiple specialized sensors.
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
Enables accurate 3D position measurement with reduced resource consumption, improved cost-effectiveness, and enhanced precision, suitable for applications like washing machines and motor vehicles, while being economical and sensitive enough for safety-critical use.
Implementation Method 1
the sensor is a two- and/or three-dimensional Hall sensor
Data Source
AI summary
The invention relates to a device for position and/or movement and/or speed measurement (1), comprising a magnet (2) and a sensor (3) for detecting the magnetic field strength. The magnet (2) and/or the sensor (3) cooperate with a moving element (4), wherein a relative movement between the sensor (3) and the magnet (2) may be brought about by the moving element (4). The magnet (2) generates an essentially dipole magnetic field (5). The sensor (3) measures the components of the magnetic field (5) in three linear independent spatial directions (6) in the sensor (3) at the same place (7). The movement and/or position and/or speed of the moving element (4) can thus be determined from the magnetic field strengths detected by the sensor (3).