Train Wheel Slip Detection Using Sensor Change Modes
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Solution Overview
Problem
Existing on-board devices for detecting spinning and sliding at trains are prone to false detections due to sensor anomalies, leading to inaccuracies in determining train positions.
Innovation Solution
A spinning and sliding detection device that utilizes a change detection unit to calculate change amounts from multiple sensors and thresholds, and a determination unit to identify spinning or sliding occurrences while detecting sensor anomalies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If sensor detected values are used directly for determination, then the detection process is simple, but false detection occurs due to sensor anomalies
Solution Approach 1:
The patent introduces a change amount calculation unit as an intermediary between the sensor and the determination unit. This intermediary calculates the change amount of detected values over time, which serves as a mediator that filters out sensor anomalies while preserving genuine spinning/sliding events. The change amount acts as a buffer that transforms raw sensor data into more reliable determination inputs.
Solution Approach 2:
The system implements feedback by continuously monitoring change amounts and using them to adjust determination decisions. The determination unit receives feedback about the magnitude of change in sensor readings and uses this feedback to distinguish between normal sensor variations and actual spinning/sliding events, thereby improving detection reliability.
2Reliability
If multiple sensors and change amounts are used, then detection accuracy improves, but device complexity increases
Solution Approach 1:
The patent segments the detection function into distinct modular units: a change amount calculation unit that processes sensor data, and a determination unit that makes decisions based on the calculated change amounts. This segmentation allows each unit to perform its specific function independently, improving detection accuracy while maintaining manageable system complexity through clear functional separation.
Data Source
AI summary
A spinning and sliding detection device in a train includes: a change detection unit that periodically acquires a first detected value from a speed sensor, calculates a first change amount, using the first detected values, periodically acquires a second detected value from an acceleration sensor, calculates a second change amount, using the second detected values, and selects a change mode from a plurality of change modes defined for determining whether spinning or sliding has occurred at the train, using the first change amount, the second change amount, a first threshold, and a second threshold and outputs the selected change mode; and a spinning and sliding determination unit that determines whether spinning or sliding has occurred at the train and determines whether an anomaly has occurred in either the speed sensor or the acceleration sensor, based on the change mode acquired from the change detection unit.