Ground Base Device Train Departure Control
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Solution Overview
Problem
Conventional train control systems fail to adjust intervals between trains effectively when the central control device fails, leading to potential delays.
Innovation Solution
A ground base device with a schedule timetable storage unit, departure-obstructed condition determination unit, departure time control unit, departure interval control unit, and departure instruction signal output unit, which ensures appropriate intervals between trains by using a received schedule timetable when the central control device is unavailable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the train departs immediately when a departure-possible condition on the local side is satisfied, then the ease of operation is improved, but the intervals between a plurality of trains cannot be adjusted leading to potential delays
Solution Approach 1:
The ground base device pre-stores the schedule timetable information including departure times and intervals in its storage unit before central control device failure occurs. When failure happens, the device immediately retrieves and applies the pre-stored schedule information to control train departures, avoiding the need for real-time central control while maintaining proper train intervals and preventing delays
Solution Approach 2:
The ground base device acts as an intermediary between the failed central control device and the local train operation. It receives and stores schedule timetables from the central control device when functional, then uses this stored information to mediate train departure control when the central device fails, ensuring intervals are maintained without requiring continuous central control
2Productivity
If the central control device is used to control train departures, then the productivity is improved through centralized management, but the reliability deteriorates when the central control device fails
Solution Approach 1:
The ground base device implements local autonomy by storing and processing schedule timetable information locally at the ground base, rather than relying entirely on centralized control. This allows the local ground base to independently manage train departures using pre-stored schedule data, maintaining operational reliability even when the central control device fails
Solution Approach 2:
The ground base device prepares for potential central control failure by pre-storing schedule timetable information in its storage unit. This beforehand preparation creates a buffer that ensures continuous operational reliability - when the central control device fails, the ground base can immediately switch to using the pre-stored schedule information without interruption to train operations
Data Source
AI summary
A ground base device includes a schedule timetable storage unit storing a received schedule timetable periodically transmitted from the central control device; a departure-obstructed condition determination unit determining whether a departure-obstructed condition of a train is resolved and outputting departure-obstructed condition cancel signal when the departure-obstructed condition is resolved; a departure time control unit outputting departure-time appropriate signal when current time is departure time based on the schedule timetable upon receiving the departure-obstructed condition cancel signal; a departure interval control unit outputting departure-interval appropriate signal when intervals between the train and preceding and following trains are a threshold value or more upon receiving the departure-time appropriate signal; and a departure instruction signal output unit outputting a departure instruction signal upon receiving the departure-interval appropriate signal, and, when the central control device fails, the departure time control unit uses the schedule timetable received when the central control device is normal.