Axle Counter Train Dynamics for Adaptive Railroad Crossing Closure
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Solution Overview
Problem
Existing methods for operating railroad crossings rely on additional sensor technology, which reduces reliability and introduces measurement uncertainties, and fail to adapt closure times based on the properties of approaching trains, leading to inefficient operation.
Innovation Solution
Utilizing axle counters to calculate velocity and acceleration of approaching trains, allowing for precise determination of closure times based on train properties without additional sensors, and employing pattern detection and machine learning to differentiate between passenger and freight trains for optimized closure times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional sensor technology is installed to detect train properties, then measurement precision improves, but reliability deteriorates due to more failure points
Solution Approach 1:
The axle counter is designed to perform multiple functions: it not only counts axles for train detection but also calculates velocity and acceleration by analyzing the timing and sequence of axle passages. This multi-functionality eliminates the need for separate sensors, maintaining reliability while providing comprehensive train property detection.
Solution Approach 2:
The patent combines velocity and acceleration measurement capabilities into the existing axle counter system by processing axle passage timing data. Instead of using separate velocity sensors and acceleration sensors, the system merges these measurement functions into the single axle counter, reducing the number of components and potential failure points.
2Reliability
If closure time is extended to ensure safety for all train types, then safety improves, but loss of time increases for passenger trains
Solution Approach 1:
The closure time is made dynamic rather than static. The system calculates velocity and acceleration in real-time and uses these values to determine the appropriate closure time for each specific train. This allows the closure time to adapt to each train's actual motion characteristics, extending it only as much as necessary for safety.
Solution Approach 2:
The patent changes the parameters used to determine closure time from fixed conservative estimates to dynamically calculated values based on actual train velocity and acceleration. By using real measured parameters instead of worst-case assumptions, the system optimizes closure duration to match actual safety requirements.
3Ease of operation
If fixed closure time is used for all trains, then ease of operation improves, but adaptability deteriorates
Solution Approach 1:
The system performs self-service by automatically calculating velocity and acceleration from axle counter data and determining the appropriate closure time without requiring manual intervention or pre-programming for different train types. The system adapts to each train automatically based on its measured properties, maintaining ease of operation while achieving full adaptability.
Solution Approach 2:
The system uses feedback from the axle counter measurements to automatically adjust closure time decisions. By continuously monitoring axle passage timing and calculating actual velocity and acceleration, the system receives real-time feedback about train characteristics and automatically adapts the closure time accordingly, eliminating the need for manual configuration.
Data Source
AI summary
A method for operating a railroad crossing includes using an axle counter to capture measurement data for rail vehicles approaching the railroad crossing during passage of the rail vehicle. The velocity and the acceleration of the rail vehicle are calculated from the measurement data as properties of the rail vehicle by arithmetic measures. A time of closure is specified for triggering a closure of the railroad crossing as a function of the calculated properties of the rail vehicle. The velocity and the acceleration are calculated from the measurement data of the axle counter. The time of closure of the railroad crossing is specified with reference to the calculated velocity and the calculated acceleration as the rail vehicle is leaving the axle counter. An apparatus for operating a railroad crossing, a computer program product and a delivery apparatus for the computer program product are also provided.