Hall Element Arrangement for Position Sensor Precision
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Solution Overview
Problem
Magnetic position sensors lack precision compared to optical angle sensors, which are sensitive to dirt and limited by temperature range, and do not have absolute counting capabilities without batteries or gearing mechanisms.
Innovation Solution
An integrated circuit arrangement for a magnetic position sensor featuring a measurement substrate with Hall elements arranged to minimize mechanical tensions and temperature influences, combined with a processing electronic system that includes a multiplexer, amplifier, and micro-controller for precise angular or distance measurement, allowing for absolute position calculation without external power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnetic position sensors are used, then reliability and temperature stability are improved, but measurement precision deteriorates compared to optical sensors
Solution Approach 1:
The patent applies local quality by strategically positioning Hall elements at specific locations on the measurement substrate - specifically at outer edges with distances to center of edges amounting to at most 25% of the total length of the corresponding outer edge. This localized arrangement optimizes the magnetic field detection quality at critical positions while maintaining overall system reliability and temperature stability.
Solution Approach 2:
The patent employs asymmetry by rotating the virtual polygon formed by Hall elements with respect to the measurement substrate. This asymmetric configuration allows the sensor to achieve absolute position measurement capabilities without requiring symmetric optical components, thereby improving measurement precision while maintaining the inherent temperature stability of magnetic sensors.
2Measurement precision
If Hall elements are arranged at outer edges of measurement substrate, then measurement precision is improved, but mechanical tension influence increases
Solution Approach 1:
The patent applies parameter changes by precisely controlling the positional parameters of Hall elements - specifically setting their distance to the center of edges at most 25% of the total length of the corresponding outer edge. This parameter optimization achieves a balance between improving measurement precision through edge positioning and minimizing mechanical tension influence by not placing elements exactly at the most stressed corner positions.
3Measurement precision
If optical angle sensors are used, then measurement precision is improved, but reliability deteriorates due to sensitivity to dirt and limited temperature range
Solution Approach 1:
The patent applies mechanics substitution by replacing the optical detection system with a magnetic field-based Hall element system. This substitution eliminates the mechanical and optical components that are sensitive to dirt and temperature, thereby improving reliability while maintaining measurement precision through strategic Hall element arrangement that optimizes magnetic field detection.
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 solution enhances the precision and temperature stability of magnetic position sensors, enabling precise angular or distance measurement with reduced mechanical tension influence and absolute position calculation, expanding their application range.
Implementation Method 1
at least three Hall elements, which are arranged on the measurement substrate such that areas of the Hall elements, which are sensitive to a magnetic field
Data Source
AI summary
The invention relates to an integrated circuit arrangement for a position sensor for measuring angles or distances, wherein the circuit arrangement comprises: a measurement substrate, which defines a measurement plane and which is configured such that it comprises a plurality of corners; at least three Hall elements, which are arranged on the measurement substrate such that areas of the Hall elements, which are sensitive to a magnetic field, extend in the measurement plane and/or form a part of the measurement plane, and that a virtual polygon, which is formed by the Hall elements, is rotated with respect to the measurement substrate such that the Hall elements are each located at an outer edge of the measurement substrate and have a distance to a center of an edge of the corresponding outer edge amounting to at maximum 25% of a total length of the corresponding outer edge, wherein the Hall elements are, in an intended use of the circuit arrangement during the measurement, configured to respectively output an output signal, which corresponds to a magnetic field strength of a magnet to be detected; and a processing electronic system, to which the output signals of the Hall sensors are delivered in the intended use of the circuit arrangement during the measurement.