Railway Wheel Sensor Autonomous Calibration
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Solution Overview
Problem
Existing wheel sensor calibration methods require regular manual intervention and maintenance personnel, which is inefficient and disrupts railway operations, especially in cases where recalibration is necessary due to wear or other variables.
Innovation Solution
A method where the wheel sensor autonomously determines the need for calibration and schedules it without external communication or intervention, using criteria such as the end of rail vehicle travel and measured value deviations to ensure calibration occurs during suitable times without affecting train operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual calibration is performed regularly to compensate for wear and maintaining accuracy, then measurement precision is improved, but maintenance personnel and time are required which reduces productivity
Solution Approach 1:
The wheel sensor performs automatic self-calibration by detecting its own base state values and comparing them against stored reference values. The sensor autonomously determines when calibration is needed and executes the calibration process without requiring external maintenance personnel, thereby maintaining measurement precision while eliminating manual intervention and maximizing railway operational productivity.
2Reliability
If calibration is performed frequently to ensure reliability, then reliability is improved, but loss of time increases due to repeated maintenance interventions
Solution Approach 1:
The wheel sensor continuously monitors its own operational parameters and compares current base state values against stored reference values. When deviations exceed predetermined thresholds, the sensor automatically triggers calibration. This feedback mechanism ensures reliability is maintained by calibrating only when necessary, avoiding unnecessary time loss from frequent manual interventions while ensuring calibration occurs when reliability is compromised.
3Ease of operation
If automatic calibration is implemented without external control, then ease of operation is improved, but device complexity increases due to autonomous decision-making requirements
Solution Approach 1:
The wheel sensor incorporates autonomous calibration capability by integrating a processing circuit that automatically compares current base state values against stored reference values and executes calibration when needed. This self-service approach simplifies operation by eliminating the need for external control systems or manual intervention, while the added complexity is confined to the sensor's internal processing circuitry, providing a net gain in ease of operation.
Data Source
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AI summary
The invention relates to a method for automatically calibrating a wheel sensor which method is particularly flexible in use. According to the invention, the wheel sensor determines that calibration must be carried out (10, 20), the wheel sensor determines a time suitable for carrying out the calibration (50) and the calibration itself is carried out by the wheel sensor at the time determined (60). The invention further relates to a wheel sensor designed to carry out the method.