Rail Signalling System Initialization via Diverse Train Detection
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Solution Overview
Problem
Existing rail signalling systems face challenges in determining train locations during partial or complete failures, especially in unmanned metro or underground systems, where continuous trackside detection is not feasible, leading to difficulties in restarting the system and managing train movements safely.
Innovation Solution
A centralized system with trackside beacons and a train database that provides coarse train detection, enabling the initialization of the signalling system without continuous trackside detection, and allows for the management of train movements and maintenance activities by using transceivers with inertial navigation sensors and redundant communication paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous trackside train detection is used, then train location determination is reliable during normal operation, but the system cannot restart after complete signalling system failure
Solution Approach 1:
The patent implements preliminary action by establishing a diverse train detection system using beacons and inertial navigation that operates independently of the main signalling infrastructure. This alternative detection mechanism is prepared in advance specifically to enable system restart after failures, allowing trains to determine their locations without relying on continuous trackside detection equipment.
2Ease of operation
If voice protocols are used to report lost train locations, then manual intervention can manage train movements, but unmanned systems cannot implement this solution
Solution Approach 1:
The patent applies self-service by implementing an automated alternative location reporting mechanism using beacons and inertial navigation sensors. Instead of requiring manual voice protocols, the system autonomously determines and reports train locations through diverse detection methods, enabling unmanned systems to self-manage after signalling failures without human intervention.
3Object-affected harmful factors
If trains are stopped during signalling system failure for safety, then safety is maintained, but system productivity is reduced during restart
Solution Approach 1:
The patent uses preliminary action by pre-establishing diverse train location detection capabilities through beacons and inertial navigation. This allows the system to quickly determine train locations and safely restart operations without prolonged stops, thereby maintaining safety while improving restart efficiency and reducing productivity loss.
Solution Approach 2:
The patent implements feedback by continuously monitoring train locations through multiple detection methods and using this information to make real-time decisions about system restart. The feedback mechanism allows the system to progressively restore operations as train locations are confirmed, rather than requiring complete system shutdown or prolonged stops.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the safe and timely restart of the railway after signalling system failures, accounts for train movements during failures, and manages maintenance activities without continuous trackside detection, ensuring accurate train location determination and system recovery.
Implementation Method 1
transceivers with inertial navigation sensors
Implementation Method 2
trackside beacons
Data Source
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AI summary
A method of initialising a rail signalling system for a rail network with a plurality of trains located therein, the signalling system having a signalling architecture comprising signalling equipment, signalling communication equipment located on each train for enabling train location information to be sent from the train to the signalling equipment; and a controller, in communication with the signalling equipment, for controlling the signalling equipment; comprises the steps of: a)dividing the network into a plurality of blocks; b)providing a train location detection system,diverse to the signalling architecture,comprising a train database for storing the location of each train within the network at a block level, the train database being in communication with the controller for sending train location information thereto; c)setting the controller to treat any blocks with at least one train located therein as occupied; d)causing one train to move if the block ahead of that train in the direction of travel is not occupied; and e)repeating the previous step for each of the plurality of trains.