Platform Screen Door Opening Codes for Coupled and Baggage Trains
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Solution Overview
Problem
Existing screen door control technologies in urban rail transit fail to meet safety integrity level SIL4, cannot support passenger boarding and alighting operations at different positions on the platform for short train formations, and do not support the inclusion of a baggage carriage.
Innovation Solution
A method involving onboard electronic map calculations to determine safe passenger boarding and alighting areas, merging screen door opening codes, and using an interlocking system to ensure correct door operation, supported by onboard and trackside systems meeting SIL4 requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single screen door opening code is used for one train formation, then the control system is simple, but the train formation cannot support boarding and alighting at different positions on the platform
Solution Approach 1:
The screen door opening control is segmented into multiple independent opening codes (first opening code and second opening code) corresponding to different boarding and alighting positions. Each code can be independently activated based on the train formation type and platform configuration, allowing flexible selection of opening positions without requiring a completely new control system.
Solution Approach 2:
The screen door opening code is made dynamic by selecting between first and second opening codes based on real-time conditions including train formation type (coupled or short formation), baggage carriage presence, and platform position. This dynamic selection enables the system to adapt to different operational scenarios while maintaining a unified control framework.
2Adaptability or versatility
If the screen door control system supports multiple train formation types and baggage carriages, then the adaptability is improved, but the system complexity increases
Solution Approach 1:
The control system achieves universality by designing a unified screen door opening control method that handles multiple train formation types (coupled formation, short formation), baggage carriage configurations, and different platform positions through a single set of opening codes. The system uses conditional logic to select appropriate codes rather than requiring separate control systems for each scenario.
Solution Approach 2:
The system manages complexity by changing parameters (opening code selection) based on input conditions (train formation type, baggage carriage presence, platform position) rather than changing the fundamental control structure. This parameter-based approach allows the system to adapt to various configurations while maintaining a consistent control framework.
3Productivity
If screen doors are opened at incorrect positions, then the operation efficiency is improved by allowing flexible boarding, but safety issues occur such as passengers falling onto tracks
Solution Approach 1:
The system performs preliminary determination of the correct screen door opening code based on train formation type, baggage carriage presence, and platform position before actual door opening. This preliminary calculation ensures that doors are opened only at safe and appropriate positions, preventing safety incidents while enabling efficient boarding and alighting operations.
Data Source
AI summary
The present invention relates to a screen door control method supporting both coupling and a baggage carriage, a device, and a medium. The method includes: S1, calculating data of a safe passenger boarding and alighting area in an onboard electronic map library based on train running rules and train formations allowed for online running; S2, merging, by an interlocking system based on the train running rules and the train formations allowed for online running, same opening codes for actually opening screen doors in data logic; S3, calculating, by an onboard controller, a screen door opening code based on a current actual train formation, a baggage carriage condition, and data of a safe passenger boarding and alighting area in which the current train formation is located; and S4, driving, by the interlocking system, a corresponding screen door to be opened. Compared with the prior art, the present invention has advantages of supporting an operation manner of replacing a first carriage at a head or tail of different train formations with a baggage carriage, and the like.