Hall Sensor Rotor Position Checking for Abnormality Detection
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Solution Overview
Problem
Existing sensing systems for vehicle transmissions face challenges in accurately determining whether a rotor and sensor are abnormal without complicating the manufacturing process or increasing costs, as current methods require additional sensor units.
Innovation Solution
A sensing apparatus comprising a first and second Hall sensor unit and a control unit that compares output values with phase differences to detect rotor position and generate warning signals based on reference values, allowing for abnormality determination without additional parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional sensor units are installed to determine sensor abnormality, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The sensor unit performs self-diagnosis by comparing its own output signals. The control unit determines sensor abnormality by analyzing whether the output signals from the sensor unit satisfy predetermined conditions, eliminating the need for additional sensor units. This self-service approach resolves the contradiction by achieving accurate abnormality detection without increasing device complexity.
Solution Approach 2:
The system uses feedback from the sensor unit's own output signals to determine its operational status. The control unit receives output signals from the sensor unit, compares them against predetermined conditions, and determines abnormality based on this feedback. This feedback mechanism enables accurate measurement of sensor health without requiring additional sensing components.
2Measurement precision
If additional sensor units are installed to determine sensor abnormality, then measurement precision is improved, but manufacturing cost increases
Solution Approach 1:
The sensor unit performs self-diagnosis by comparing its own output signals. The control unit determines sensor abnormality by analyzing whether the output signals from the sensor unit satisfy predetermined conditions, eliminating the need for additional sensor units. This self-service approach resolves the contradiction by achieving accurate abnormality detection without increasing device complexity.
Solution Approach 2:
The patent extracts the abnormality detection function from the sensing function. Instead of using separate sensor units for detection, the system extracts and analyzes the output signals from the existing sensor unit to determine its operational status. This separation of functions allows accurate abnormality detection using the existing sensor unit without adding redundant components.
3Reliability
If multiple sensor units are used to compare position detection values, then reliability is improved, but device complexity increases
Solution Approach 1:
The sensor unit performs self-diagnosis by comparing its own output signals. The control unit determines sensor abnormality by analyzing whether the output signals from the sensor unit satisfy predetermined conditions, eliminating the need for additional sensor units. This self-service approach resolves the contradiction by achieving accurate abnormality detection without increasing device complexity.
Solution Approach 2:
The existing sensor unit performs multiple functions: it detects rotor position and simultaneously provides data for determining its own operational status. The output signals from the sensor unit are used both for position detection and for abnormality determination, making the sensor unit multi-functional. This universality resolves the contradiction by achieving reliable abnormality detection without requiring additional dedicated sensor units.
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 detection of sensor unit abnormalities without adding extra components, simplifying manufacturing and reducing costs while maintaining accurate rotor position sensing.
Implementation Method 1
The sensor unit is disposed to face the sensing magnet and detects the position of the rotor by sensing a change in magnetic flux caused by the rotating sensing magnet
Data Source
AI summary
A sensing apparatus includes a first sensor unit including a first hall sensor and a second hall sensor, wherein the first hall sensor outputs two first output values having different phases from each other, and the second hall sensor outputs two second output values having different phases from each other; a second sensor unit outputs a third position detection value of a rotor; and a control unit that compares a first position detection value of the rotor, which is on the basis of the first output values, with a second position detection value of the rotor, which is on the basis of the second output values, and compares at least one of the first position detection value of the rotor and the second position detection value of the rotor, with the third position detection value of the rotor outputted from the second sensor unit.