Magnetic Sensor Positioning With Longitudinal Radial-Field Variation
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Solution Overview
Problem
Existing sensor technologies face challenges in precisely determining the position of a sensor device due to limitations in generating and measuring varying magnetic field components along a longitudinal axis.
Innovation Solution
A sensor apparatus with a magnet arrangement generating a magnetic field having varying radial components along a longitudinal axis, combined with a magnetic sensor device comprising multiple sensors, allows for precise position determination through the use of a magnetic revolution counter and Hall sensor to measure these components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single magnetic sensor is used to determine position, then the device complexity is reduced, but the measurement precision is insufficient
Solution Approach 1:
The magnetic sensor device is divided into multiple independent magnetic sensors (first magnetic sensor and second magnetic sensor), each measuring different radial magnetic field components. This segmentation allows precise position determination through multiple measurements while keeping each individual sensor relatively simple in structure.
Solution Approach 2:
The patent transitions from single-dimensional position sensing to multi-dimensional magnetic field component measurement. By measuring both first and second radial magnetic field components that are perpendicular to each other, the system achieves precise position determination in multiple dimensions, resolving the contradiction between precision and complexity.
2Measurement precision
If only one radial magnetic field component is measured, then the device complexity is reduced, but the measurement precision and position determination accuracy are insufficient
Solution Approach 1:
Different regions of the magnet arrangement are designed to generate specific magnetic field characteristics. The magnet arrangement creates localized variations in radial magnetic field components along the longitudinal axis, allowing precise position determination through measurement of these localized field variations without requiring complex overall structure.
3Adaptability or versatility
If the measuring range is increased, then the position sensing capability is improved, but the measurement precision may be reduced
Solution Approach 1:
The magnetic field configuration is designed to be dynamic along the longitudinal axis, with radial magnetic field components that vary continuously. This dynamic field distribution allows the sensor device to maintain precise measurement capability across a large measuring range, as the varying field components provide position information throughout the extended range.
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 efficient and precise determination of the sensor device's position by utilizing the varying magnetic field components, providing a large measuring range and accurate position sensing.
Implementation Method 1
a magnet arrangement which extends along a longitudinal axis for generating a magnetic field and is configured to generate the magnetic field with at least a first radial magnetic field component varying along the longitudinal axis
Implementation Method 2
a magnetic sensor device which is arranged movably relative to the magnet arrangement along the longitudinal axis and comprises a first magnetic sensor and a second magnetic sensor
Data Source
AI summary
An apparatus, in particular a sensor apparatus, comprising a magnet arrangement which extends along a longitudinal axis for generating a magnetic field and is configured to generate the magnetic field with at least a first radial magnetic field component varying along the longitudinal axis, and a magnetic sensor device which is arranged movably relative to the magnet arrangement along the longitudinal axis and comprises a first magnetic sensor and a second magnetic sensor.