Redundant Train Supervision Switching for Seamless System Migration
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Solution Overview
Problem
Existing automatic train supervision systems face challenges during transformation periods, requiring reliable switching between new and old systems while ensuring continuous passenger service, which is often disrupted due to unverified new systems and complex manual operations.
Innovation Solution
A switching system with a hot backup and cold backup module, including transfer switches and redundant signal communication interface machines, ensures reliable switching through a mechanical serial port design, dual-machine redundancy, and a monitoring module for state determination, allowing remote and manual switching with data replication and synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual switching operations are performed during system transformation, then switching flexibility is improved, but switching time and operational complexity increase
Solution Approach 1:
The system performs preliminary actions by pre-configuring hot backup and cold backup modes, establishing transfer switches and redundant interface machines before actual switching is needed. This allows the system to be prepped for rapid switching without requiring complex manual operations during the actual transition, thus reducing switching time while maintaining operational flexibility.
Solution Approach 2:
The patent introduces transfer switches and redundant interface machines as intermediary components that automate the switching process. These intermediaries handle the complex switching operations automatically, reducing both the time required and the manual workload while preserving the ability to switch between different operational modes.
2Adaptability or versatility
If a new automatic train supervision system is introduced during transformation, then system functionality is improved, but system reliability deteriorates due to unverified new system
Solution Approach 1:
The system dynamically adjusts its configuration by enabling hot backup and cold backup modes that can be switched based on system stability and verification status. This dynamic adaptability allows the system to incorporate new functionality while maintaining reliability by falling back to proven systems when needed, thus resolving the contradiction between functionality and reliability.
Solution Approach 2:
The patent implements beforehand cushioning by establishing hot backup and cold backup systems in advance of full new system deployment. These backup systems serve as a safety cushion, ensuring that if the new system proves unreliable during verification, the system can immediately switch to the proven backup systems, thus protecting overall system reliability while still allowing new functionality to be tested.
3Reliability
If redundant switching units with dual-machine redundancy are implemented, then system reliability is improved, but device complexity increases
Solution Approach 1:
The redundant switching unit is segmented into distinct functional modules: hot backup module, cold backup module, transfer switches, and interface machines. This segmentation allows each component to be independently managed and configured, reducing the perceived complexity while maintaining high reliability through systematic redundancy. Each segment serves a specific function, making the overall complex system more manageable.
Solution Approach 2:
The redundant interface machines are designed with multi-functionality, serving as either active or standby interfaces depending on system needs. This universality reduces device complexity by using the same hardware platform for multiple purposes rather than requiring specialized components for each function, thus achieving reliability through redundancy without proportionally increasing complexity.
4Duration of action of stationary object
If existing automatic train supervision continues to operate during transformation, then service continuity is improved, but switching complexity increases
Solution Approach 1:
The system maintains continuity of useful action by implementing hot backup mode that allows the existing automatic train supervision to continue operating seamlessly while the new system is being verified. The transfer switches and redundant interface machines enable continuous service without interruption, managing the complexity of dual-system operation through automated switching mechanisms rather than manual intervention.
Data Source
AI summary
A switching system and a switching method for a plurality of automatic train supervisions, in which the switching system is installed at each station, a redundant switching unit in the switching system includes a first signal communication interface machine and second signal communication interface machine, and a redundant switching module is connected to the first signal communication interface machine and second signal communication interface machine, respectively, and the first signal communication interface machine and second signal communication interface machine are connected to a new automatic train supervision and an existing automatic train supervision, respectively. A current signal communication interface machine in the redundant switching unit of the switching system switches from the existing automatic train supervision to the new automatic train supervision or from the new automatic train supervision to the existing automatic train supervision according to a switching instruction sent by a control center.