Position Detector Using Wiegand Module for Reliable Direction Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing position detectors lack reliability and operational safety due to the inability to distinguish between magnet rotation direction and sensor malfunction, and are susceptible to noise interference.
Innovation Solution
A position detector system incorporating a Wiegand module, Hall elements, and a processing electronic system that evaluates redundant signals from multiple Hall elements to determine the rotation direction and polarity of a permanent magnet, providing increased reliability and noise immunity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an additional sensor element is used to determine rotation direction, then position detection capability is improved, but reliability deteriorates because sensor malfunction cannot be distinguished from valid no-signal conditions
Solution Approach 1:
The system uses the Wiegand module to generate voltage pulses that provide feedback information about magnet position and movement direction. This redundant information channel allows the processing electronic system to verify sensor element functionality and distinguish between valid no-signal conditions and sensor malfunctions, thereby resolving the reliability issue while maintaining position detection capability
2Device complexity
If a single sensor element is used, then device complexity is reduced, but operational safety deteriorates due to susceptibility to noise fields and inability to verify signal validity
Solution Approach 1:
The system segments the sensing function into two independent components: the Wiegand module for generating position and direction information, and the sensor element for detecting magnet position. This segmentation creates redundant information channels that allow noise filtering and verification without significantly increasing overall device complexity, as both components work together in an integrated manner
3Reliability
If redundant sensor elements are added to eliminate noise interference, then operational safety is improved, but device complexity increases
Solution Approach 1:
The Wiegand module serves multiple functions: it generates voltage pulses for position detection, provides movement direction information through pulse polarity, and acts as a reference for verifying sensor element functionality. This multi-functionality provides redundancy for noise elimination without requiring additional dedicated components, thereby improving operational safety while minimizing the increase in device complexity
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 system enhances reliability and operational safety by obtaining redundant information about the magnet's movement direction and polarity, reducing the likelihood of sensor malfunctions and noise interference.
Implementation Method 1
a first Hall element and a second Hall element are arranged on a measurement substrate such that their areas that are sensitive to a magnetic field extend in the measurement plane and/or form a part of the measurement plane
Implementation Method 2
the coil of the Wiegand module generates a voltage pulse, if a north pole or a south pole of the permanent magnet assembly is located at a first position
Data Source
AI summary
A position detector is disclosed that is capable of operating in an autonomous mode or non-autonomous mode. As an example, in the autonomous mode, the position detector is not supplied with external energy, but rather receives energy from a Wiegand module thereby enabling the position detector to obtain information about movement of an object.