Wiegand Counting Sensor Error Correction via Magnetic Pole Tracking
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Solution Overview
Problem
Existing counting sensors with Wiegand modules face inaccuracies and reliability issues due to rudimentary voltage impulses, which can occur during changes in movement direction or due to wire quality, leading to errors in counting rotations or linear displacements.
Innovation Solution
A counting sensor design that incorporates a Wiegand module with a soft-magnetic core and hard-magnetic shell, a processing electronic circuit, and a permanent magnet arrangement, which generates distinct voltage impulses based on magnetic pole positions, allowing for direction and pole information evaluation, and includes error detection and correction mechanisms using tracking information to differentiate between impulse types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the Wiegand module is used to generate voltage impulses for counting, then the counting sensor can operate autonomously without external energy supply, but rudimentary voltage impulses occur during direction changes or due to wire quality, leading to counting errors
Solution Approach 1:
The system uses feedback by comparing consecutive direction information and magnetic pole information to detect errors caused by rudimentary voltage impulses. The processing electronic circuit monitors the consistency of detected parameters and triggers correction mechanisms when discrepancies are found, thereby maintaining counting accuracy despite energy constraints.
Solution Approach 2:
The invention changes the evaluation parameters by introducing direction information and magnetic pole information as additional criteria for validating voltage impulses. By monitoring these parameters and their consistency across consecutive impulses, the system can distinguish between valid counting events and rudimentary impulses, resolving the reliability issue while maintaining autonomous operation.
2Adaptability or versatility
If the counting sensor operates in autonomous mode using energy from voltage impulses, then no external energy supply is needed, but rudimentary impulses do not provide sufficient energy for storing the count value
Solution Approach 1:
The system performs preliminary evaluation of voltage impulses by checking direction information and magnetic pole information before proceeding to energy-intensive storage operations. This preliminary action filters out rudimentary impulses that would not provide sufficient energy, preventing wasted storage attempts and ensuring that only valid impulses with adequate energy are processed for counting and storage.
Solution Approach 2:
The processing electronic circuit uses feedback mechanisms to monitor the energy sufficiency of each voltage impulse. By evaluating the consistency of direction and magnetic pole information, the system determines whether an impulse provides adequate energy for storage, and only proceeds with storage operations when the feedback indicates sufficient energy availability.
3Measurement precision
If rudimentary voltage impulses are recognized, then the processing electronic circuit can evaluate them, but it is difficult to distinguish between impulses from direction changes and those from wire quality issues
Solution Approach 1:
The invention segments the evaluation process into distinct components: direction information detection, magnetic pole information detection, and consistency checking. By dividing the complex error detection task into these manageable segments, the system can systematically analyze each aspect of the voltage impulse without overwhelming complexity, maintaining measurement precision while managing device complexity.
Solution Approach 2:
The system introduces additional evaluation parameters (direction information and magnetic pole information) that transform the complex differentiation problem into a more manageable parameter comparison task. By changing the evaluation space to include these parameters, the system can distinguish between different types of rudimentary impulses through parameter consistency checks rather than relying on complex pattern recognition.
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 provides an accurate and reliable counting sensor capable of distinguishing between different types of rudimentary voltage impulses, ensuring precise tracking of rotations or linear displacements even in autonomous mode without external energy supply.
Implementation Method 1
upon movement of the permanent magnet arrangement in said one direction, the coil of the Wiegand module generates a voltage impulse, if a north pole or a south pole of the permanent magnet arrangement is located at a first position
Data Source
AI summary
The invention relates to a counting sensor for counting the number of rotations or of linear displacements of an object, wherein the counting sensor comprises:one single Wiegand module;at least one sensor element;a processing electronic circuit, which is connected to the sensor element; anda permanent magnet arrangement, which is movable relatively to the Wiegand module; whereinthe processing electronic circuit is configured to obtain direction information, whether the permanent magnet arrangement moves in said one direction or in an opposite direction, and (ii) to obtain magnetic pole information; anda data storage for storing a value, which indicates the number of the rotations or of the linear displacements; wherein:the processing electronic circuit is configured (i) to determine, on the basis of the direction information and the magnetic pole information, the number of the rotations or of the linear displacements of the object and to store the corresponding value in the data storage, (ii) to perform, on the basis of a sequence of the direction informations and of the magnetic pole informations, an error detection to the effect whether one of the rotations or one of the linear displacements of the object has not been recognized partially or completely, and (iii) to determine an according correction and to correct the value upon detection of an error.