Wide-Area Interlocking for Dynamic Train Interval Control
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Solution Overview
Problem
The existing train control systems face challenges in accurately controlling dynamic train intervals due to the limitations of track circuits, leading to inefficiencies and safety risks, especially in complex weather conditions like thunderstorms, where equipment faults and incorrect signal displays can cause rear-end collisions.
Innovation Solution
A method and device for dynamically adjusting train intervals using wide-area interlocking control, which employs object-oriented programming and a Multi-Agent model to manage train relationships and power supply through a switching logic control circuit, allowing real-time analysis and adjustment of train positions and behaviors to ensure safe spacing and prevent collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If track circuit-based fixed block system is used for train interval control, then the system structure is simple and easy to implement, but the train positioning accuracy is low and dynamic train interval control is restricted
Solution Approach 1:
The patent divides the track into multiple sections using switches, track circuits, and signals to create discrete control zones. This segmentation allows for more precise train positioning and interval control compared to traditional fixed block systems, while maintaining manageable system complexity through modular architecture.
Solution Approach 2:
The patent implements dynamic train interval control by continuously adjusting train spacing based on real-time train positions, speeds, and track conditions. This dynamic approach replaces the static fixed block system, enabling accurate positioning and adaptive interval management that responds to changing operational conditions.
2Productivity
If moving block system or virtual block system is adopted for accurate train positioning and dynamic interval control, then traffic efficiency is improved, but the system becomes more complex and safety requirements become more stringent
Solution Approach 1:
The system segments the track into controlled sections and uses multiple track circuits within each section to provide detailed position information. This segmentation enables accurate train positioning and dynamic interval control, improving traffic efficiency while managing complexity through structured modular design.
Solution Approach 2:
The patent employs continuous feedback mechanisms where train positions, speeds, and track conditions are constantly monitored and fed back to the control system. This feedback enables real-time adjustment of train intervals and maintains safety while optimizing traffic flow, achieving high efficiency without excessive complexity.
3Reliability
If traditional interlocking control logic is used in fixed block system, then the safety of railway operations is ensured through fail-safe principle, but the real-time continuous and accurate adjustment of dynamic train interval is constrained
Solution Approach 1:
The patent replaces static interlocking control logic with dynamic control mechanisms that continuously adjust train intervals in real-time. The system maintains safety through continuous monitoring and adaptive control, allowing flexible interval adjustment while ensuring operational safety through multiple track circuits and interlocking principles adapted for dynamic operation.
Solution Approach 2:
The patent transitions from mechanical interlocking control to electronic and software-based control systems. This substitution enables real-time continuous adjustment of train intervals while maintaining safety through digital monitoring, communication systems, and software-based interlocking logic that is more flexible than traditional mechanical systems.
4Measurement precision
If point-based train precise positioning technology (Balises or cable induction loops) is employed, then train localization accuracy is improved when trains pass by, but continuous real-time positioning throughout the entire operation process is not provided
Solution Approach 1:
The patent merges multiple positioning technologies including track circuits, Balises, cable induction loops, GPS, wireless communication, and inertial navigation into an integrated positioning system. This combination provides continuous real-time positioning throughout the entire operation process, overcoming the limitations of individual point-based technologies and ensuring continuous coverage.
Solution Approach 2:
The patent uses a composite positioning approach that integrates multiple positioning technologies with different characteristics. This composite system combines the advantages of each technology (track circuits for section detection, Balises for precise point positioning, GPS for continuous location, inertial navigation for short-term accuracy) to achieve continuous real-time positioning with high accuracy throughout the entire operation process.
Data Source
AI summary
A method and device for dynamically adjusting train interval based on wide-area interlocking control, and a computer-readable storage medium. The method includes: (1) dynamically managing trains; (2) identifying a following relationship; if there is a following relationship, performing step (3), otherwise, controlling the train using existing control technology; (3) identifying weather; if the thunderstorm weather occurs, performing step (4); otherwise, adjusting the train interval by existing control technology; (4) acquiring operation states of a wireless communication system, traction power grid, traction drive system and train control system in real time; if the operation conditions are normal, performing step (5), otherwise, performing step (6); (5) independently analyzing the safety of actual following distance by the preceding and following trains in real time; performing interlocking control according to analysis results; and (6) activating a fail-safe interlocking control module to ensure dynamic and safe control of the train interval.