Train Emergency Stop Zone Selection via Onboard Positioning
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Solution Overview
Problem
Existing methods for executing emergency stops in trains rely heavily on human judgment, which can lead to unsuitable stopping locations due to varying situational awareness and reaction times, potentially compromising safety.
Innovation Solution
An automated method that analyzes the train's route beforehand to identify suitable emergency stop zones and prevention zones, uses onboard positioning systems to determine the train's location, and initiates braking to stop the train at the optimal location without driver intervention, ensuring compliance with safety restrictions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the train driver manually assesses and selects the stopping location during an emergency stop, then the driver can use situational awareness and judgment, but the reaction time increases and the stopping location may be unsuitable
Solution Approach 1:
The system pre-determines and stores suitable emergency stop zones along the train's route before the emergency occurs. When an emergency stop is requested, the system automatically identifies the nearest pre-defined zone and directs the train to stop there, eliminating the need for real-time driver assessment and reducing reaction time while ensuring reliable stopping locations
Solution Approach 2:
An automatic control system acts as an intermediary between the emergency stop request and the train's braking system. This intermediary automatically calculates the optimal stopping location based on pre-stored zone information and current train position, then initiates braking without driver intervention, resolving the contradiction between fast response and reliable location selection
2Loss of time
If the train stops at any point on the track during an emergency, then the stopping time is minimized, but safety requirements may be violated (e.g., stopping on bridges or in tunnels)
Solution Approach 1:
Before the train journey begins, the system analyzes the route and pre-identifies safe stopping zones and unsafe prevention zones (such as bridges, tunnels, and difficult-to-access sections). This preliminary classification is stored and used during emergencies to automatically direct the train to safe zones, ensuring both rapid stopping and compliance with safety restrictions
Solution Approach 2:
The system applies different characteristics to different sections of the track by marking specific zones as suitable or unsuitable for emergency stops. This local differentiation allows the automatic control system to quickly determine the nearest suitable stopping point that meets safety requirements, balancing rapid response with safety compliance
Data Source
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AI summary
The invention relates to a method for carrying out a requested emergency stop for a train in order to bring the train to a stop at a suitable point on the route travelled by the train. On the train side, a list is provided in which, for the route to be travelled by the train, zones are defined where the train is allowed to stop and/or is not allowed to stop in the event of a requested emergency stop. When the train is travelling, a request for an emergency stop is automatically recorded and analysed by the train without the involvement of the driver. The train carries out an automated determination of the position of the train in relation to the route being travelled, which is carried out independently of route-side apparatuses. Depending on the train position, a suitable zone where the train can be brought to a standstill for the emergency stop to be carried out is automatically selected from the list.