Train Position Data Storage for Energy-Efficient Automatic Switching
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Solution Overview
Problem
Current train control systems face challenges in determining the precise position of parked trains when switched off, leading to energy inefficiencies and the need for oversized batteries to maintain position data, which hinders energy-efficient and automated operation.
Innovation Solution
A method involving a track and train device where the train control unit is connected to a track reader and a fixed data memory, allowing position data to be stored and retrieved without power, enabling automatic switching on and off, and using a 2-out-of-2 principle for position verification to ensure accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the train control device remains active during parking to maintain position data, then position determination is ensured, but energy consumption increases significantly
Solution Approach 1:
The patent extracts the position data storage function from the active train control device and places it in a passive data memory on the trackside. This allows the train control to be completely switched off while position information is preserved externally, eliminating the need for continuous power consumption during parking periods.
Solution Approach 2:
The system performs preliminary action by writing position data to the trackside data memory before the train is switched off. This pre-stored information is then read back after switching on, eliminating the need for continuous operation of the train control device and enabling energy-efficient parking without sacrificing position determination capability.
2Reliability
If oversized batteries are used to maintain train controller functionality during power outages, then position determination is secured, but device complexity and cost increase
Solution Approach 1:
The patent removes the battery system entirely from the train and relocates the data storage function to the trackside infrastructure. This extraction eliminates the complexity of sizing, installing, and maintaining oversized batteries while achieving the same reliability goal through external data persistence.
Solution Approach 2:
The trackside data memory acts as an intermediary between the train control device and the permanent position record. This mediator stores position information when the train is switched off and provides it back when needed, replacing the need for complex battery-based power maintenance systems.
3Measurement precision
If the train must cross multiple balises to determine position after switching on, then position accuracy is ensured, but time consumption increases
Solution Approach 1:
The system performs preliminary action by pre-storing the exact position data in the trackside data memory before the train switches off. When the train restarts, this pre-stored information is immediately available, eliminating the need for time-consuming balise crossing sequences and enabling instant position determination while maintaining accuracy.
Solution Approach 2:
The patent creates a copy of the position data in the trackside data memory that persists across power cycles. This copy replaces the need for real-time position measurement through balise crossing, allowing the train to instantly retrieve its position information without physical movement or time delay.
4Reliability
If manual switching on is required at parking position, then position determination safety is ensured, but automation level decreases
Solution Approach 1:
The system enables self-service by automatically storing position data in the trackside memory before switching off and automatically retrieving it after switching on. This eliminates the need for manual intervention while maintaining safety through the 2-out-of-2 verification principle, allowing fully automatic driverless operation at parking positions.
Solution Approach 2:
The system implements feedback by verifying the retrieved position data against the stored position data using the 2-out-of-2 principle. This automatic verification provides safety assurance without requiring manual checks, enabling the train to autonomously confirm its position and proceed with operation.
Data Source
AI summary
The invention relates to a method for switching a train (1) on and off in a parking position, wherein a train control unit (5) is provided as part of the train and a train-monitoring system (4) is provided as part of a route, and a configuration of route and train related to the method. In the automatic method, an energy-saving complete shut-down of the train controller (5) in a parking position in the parking region is possible by means of the following steps: A) driving to the parking position, in which a route reading device (7) receives first position data sent by a placemark (3), B) storing the first position data and the operating mode by means of the train control unit, C) switching off the train (1) by means of the train control unit and shutting down the train control unit (5), D) switching on the train (1), E) checking the following conditions by means of the train control unit: 1. the operating mode is stored, 2. the route reading device (7) receives second position data, and 3. the second position data agree with the first position data, F) if said conditions are affirmed, accepting the position data and sending a locating notification to the train monitoring system (4) by means of the train control unit.