Dynamic Wheel Diameter Measurement Using Proximity Plates
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Solution Overview
Problem
Accurate determination of train wheel diameter is crucial for precise positioning and distance calculation in communication-based train control systems, but existing methods require static measurements, which can disrupt train operations and are not dynamic.
Innovation Solution
A system using proximity plates and sensors to detect wheel revolutions, with a controller determining the wheel diameter based on detection and loss of detection signals, allowing for dynamic and accurate measurements without interrupting train operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If static wheel diameter measurement methods are used, then measurement accuracy can be achieved, but train operations are disrupted and productivity decreases
Solution Approach 1:
The patent transitions from static wheel diameter measurement to dynamic measurement performed while the train is moving. The system continuously monitors wheel revolutions and calculates diameter changes in real-time during normal train operation, eliminating the need to stop trains for measurements and maintaining operational productivity while achieving accurate measurement results.
2Measurement precision
If multiple proximity plates are used to enhance measurement accuracy, then measurement precision improves, but device complexity and space requirements increase
Solution Approach 1:
The patent segments the measurement process into multiple sequential measurement points along the train's path, using proximity plates positioned at different locations. This allows the system to perform multiple measurements during a single train passage, improving accuracy through data aggregation without requiring all plates to be present simultaneously, thus managing device complexity.
Solution Approach 2:
The system is designed to function with a minimum of two proximity plates, but can accommodate additional plates for enhanced accuracy. The patent implements partial action by requiring only the minimum necessary plates to operate, while allowing optional expansion to excessive action (more plates) when higher precision is needed, providing flexibility in balancing accuracy requirements against 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
Enables precise and continuous determination of wheel diameter, improving positional accuracy and reducing operational disruptions by using multiple proximity plates to enhance measurement accuracy while minimizing cost and space requirements.
Implementation Method 1
at least one sensor generates a first signal indicating detection and loss of detection of a first proximity plate
Data Source
AI summary
A system and method provide the capability to dynamically measure the diameter of a train wheel. An onboard sensor signals detection and loss of detection of a proximity plate having a predetermined length and placed along a direction of travel of the train. A signal generator generates a signal indicating the number of revolutions of the wheel. Based on the sensor signals indicating detection and loss of detection of the proximity plate, the length of the proximity plate, and the corresponding number of wheel revolutions, a controller automatically calculates the wheel diameter.