Railway Network Security System with Virtual Signal Allocation
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Solution Overview
Problem
Current safety systems for track networks fail to optimize the sequence of vehicles and their routes, leading to inefficient use and stress on route elements, as they lack a method to dynamically manage vehicle allocations and signal states effectively.
Innovation Solution
The system specifies signals for each vehicle requesting route elements, designating them as virtual main or target signals based on danger points, allowing for optimized braking curves and route management through a communication system that allocates and confirms vehicle permissions and markings across route elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If current safety systems are used for track networks, then basic safety functions are maintained, but vehicle sequence and route optimization is insufficient leading to inefficient use of route elements
Solution Approach 1:
The system performs preliminary actions by specifying signals in advance for each vehicle before the vehicle actually reaches the track section. The control center determines and communicates the type, position, and state of signals (virtual main signals at danger points and virtual target signals at non-danger points) ahead of time, allowing vehicles to plan their braking curves and routes optimally without reactive delays.
Solution Approach 2:
The system implements dynamics by making signal specifications adaptive and vehicle-specific. Each vehicle receives customized signal information based on its particular route, position, and operational characteristics. The signal states and positions are dynamically determined rather than static, enabling optimized braking curves (gently sloping for main signals, steeply sloping for target signals) tailored to each vehicle's needs.
2Reliability
If dynamic signal specification is implemented for each vehicle, then route optimization and conflict prevention improve, but system complexity increases
Solution Approach 1:
The control center serves as an intermediary that manages the complex signal specification and allocation processes. It receives vehicle position and route information, determines appropriate signal configurations, and communicates allocations back to vehicles. This centralized intermediary handles the computational complexity of conflict prevention and route optimization, shielding individual vehicles from system complexity while maintaining high reliability through coordinated control.
Solution Approach 2:
The system implements feedback mechanisms where vehicles report their positions and route requests to the control center, which then specifies signal states and positions based on this information. The control center continuously monitors vehicle movements and adjusts signal allocations accordingly, creating a closed-loop system that prevents conflicts through real-time information exchange and adaptive signal management.
3Speed
If virtual main signals and target signals are specified at braking target points, then braking curve optimization is achieved, but information processing requirements increase
Solution Approach 1:
The system applies local quality by providing customized signal information specifically tailored to each vehicle's local context and requirements. Each vehicle receives signal specifications (type, position, state) that are locally optimized for its particular braking scenario, whether it needs a gently sloping braking curve for a virtual main signal at a danger point or a steeply sloping curve for a virtual target signal. This localized information approach minimizes unnecessary data transmission while maximizing braking optimization effectiveness.
Data Source
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AI summary
The invention relates to a security method for a railway network which is divided into track sections (G1, G2,..., Gq) by track elements (S1, S2,..., Sp), and which can be travelled by vehicles (Z1, Z2,..., Zr), wherein the vehicles (Z1, Z2,..., Zr) request steps (B, R, M) for assignment as travel path elements from selections of the track elements. According to the invention, in order to optimise the train service, each (Si, where i = 1 to p) of the selected track elements provides at least one signal (HS; ZS) for each vehicle (Zm, where m = 1 to r) that requests at least one of the steps (B, R, M) for assignment as a travel path element from same. The invention also relates to a security system for a railway network.