Local Switch Control for Safe Rail Transit Maintenance
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Solution Overview
Problem
Conventional rail transit signal systems require centralized control of switch machines, leading to inefficient and unsafe maintenance operations that depend heavily on the normal functioning of the central dispatcher and signal equipment, and lack independent local control for switch maintenance.
Innovation Solution
A switch control method and apparatus that allows for local control of switch maintenance operations through a three-step process: request, confirmation, and execution, using a local switch control panel with specific buttons and lamps to ensure safety and independence from the central system, enabling maintenance without relying on the dispatcher.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If centralized control is used for switch machines, then system reliability is improved, but maintenance efficiency deteriorates
Solution Approach 1:
The patent divides the switch control system into two independent parts: centralized control for normal operation and local control for maintenance. The local control apparatus is segmented from the central dispatcher system, allowing maintenance personnel to operate switches independently without affecting overall system reliability while significantly improving maintenance efficiency.
Solution Approach 2:
The local control apparatus acts as an intermediary between maintenance personnel and the switch machine. It provides a dedicated control interface that mediates between the need for independent maintenance operations and the requirement for centralized system management, enabling maintenance without compromising system reliability.
2Reliability
If centralized control is used for switch machines, then operational safety is improved, but maintenance independence deteriorates
Solution Approach 1:
The control system is segmented into centralized and local modes. The local control apparatus is designed as an independent segment that can operate autonomously during maintenance, providing maintenance independence while maintaining operational safety through proper interlocking and confirmation procedures.
Solution Approach 2:
The system dynamically switches between centralized control mode during normal operation and local control mode during maintenance. This dynamic adaptability allows the system to maintain operational safety under normal conditions while providing maintenance independence when needed, resolving the contradiction between safety and independence.
3Reliability
If confirmation procedures are required for maintenance, then safety is improved, but maintenance time increases
Solution Approach 1:
The local control apparatus performs preliminary actions by pre-confirming maintenance conditions and pre-establishing safety protocols before actual maintenance begins. The system automatically checks and confirms switch status, train position, and safety conditions in advance, reducing the time required during actual maintenance while maintaining safety.
Solution Approach 2:
The system implements automated feedback mechanisms that continuously monitor switch status, train position, and safety conditions. This real-time feedback eliminates the need for repeated manual confirmations during maintenance, reducing maintenance time while ensuring safety through continuous system awareness and automatic interlocking.
Data Source
AI summary
The present disclosure relates to a switch control method for a rail transit signal system, and an apparatus for the method. When a switch control command of the signal system fails or the signal system confirms agreement with local switch control, the method is configured for performing maintenance operation on a switch via the local switch control apparatus. Compared to the prior art, the present disclosure has the advantages of meeting the requirement of the local switch control, ensuring the safety of a maintenance person and operation, etc.