Train Occupancy Range Calculation for Coupled Rescue Operations
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Solution Overview
Problem
In railway systems using radio communication, accurately determining the occupancy range of coupled trains is challenging, especially during rescue operations, as the length of coupled trains changes, affecting the recognition of their position on the track.
Innovation Solution
An on-board apparatus that performs radio communication with a ground system, utilizing a storage unit for base train length information, a calculating unit to determine train occupancy range information, and a communication control unit to transmit and receive control information, along with a coupling detecting unit to manage the relative position of a failure train, allowing safe traveling control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If train IDs are integrated to manage coupled trains, then train management is simplified, but the accuracy of recognizing the occupancy range of coupled trains deteriorates
Solution Approach 1:
The system segments the train occupancy range recognition by distinguishing between the base train and coupled trains. The base train's occupancy range is calculated using its own train ID and length information, while coupled trains' occupancy range is calculated separately using their train IDs and length information. This segmentation allows accurate recognition of the total occupancy range by combining individual ranges, resolving the contradiction between simplified management and accurate recognition.
2Ease of operation
If only train ID integration is used for coupled trains, then management is easier, but the ability to accurately determine train length and occupancy range deteriorates
Solution Approach 1:
The system uses feedback by continuously monitoring and detecting coupling status between trains. When coupling is detected, the base train's control apparatus receives information about the coupled train's ID and length, and automatically updates the occupancy range calculation. This feedback mechanism ensures that train length information is not lost while maintaining easy management through automatic detection and updating.
3Device complexity
If the base train's control apparatus calculates occupancy range using only its own train length, then calculation is simpler, but accuracy during rescue operations deteriorates
Solution Approach 1:
The system dynamically adjusts the occupancy range calculation based on the coupling status. When no coupling is detected, the base train uses only its own length information for simple calculation. When coupling is detected during rescue operations, the system automatically incorporates the coupled train's length information into the calculation. This dynamic adaptation resolves the contradiction by adjusting calculation complexity according to operational conditions while maintaining accuracy.
Data Source
AI summary
At an on-board control unit of an on-board apparatus, a coupling detecting unit detects coupling of a failure train with respect to the own train. Then, in the case where detection is performed by the coupling detecting unit, a train occupancy range calculating unit updates train length information using the number of vehicles of the failure train and uses the updated train length information to calculate train occupancy range information. Further, a traveling control unit controls traveling and stop of the own train as a series of coupled trains in the case where detection is performed by the coupling detecting unit.