Portable Data Storage for Train Information Exchange
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Solution Overview
Problem
Current automatic train protection (ATP) and automatic train operation (ATO) systems face high costs due to the need for full radio bandwidth to exchange vital and non-vital data between train-carried equipment and remote locations, especially in light rail systems where track layouts and speed restrictions frequently change, making the cost of radio bandwidth disproportionate.
Innovation Solution
A portable data storage device is used to exchange information between train-carried equipment and a remote location, allowing for data storage and validation, enabling train operation within specified time frames, and reducing the need for continuous radio communication by using a portable device with data storage, input, and output means, along with auxiliary connections at both ends.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If full radio bandwidth is provided for continuous wireless communication between train equipment and remote locations, then complete data exchange capability is achieved, but system cost becomes prohibitive
Solution Approach 1:
The portable device is pre-loaded with map data and train operation information before being transferred to the train. This preliminary action eliminates the need for continuous radio communication to transmit static data, reducing bandwidth requirements while maintaining full data exchange capability for dynamic information
Solution Approach 2:
The portable device acts as an intermediary between the train equipment and the remote control system. It stores data locally and provides selective communication interfaces, allowing the train to access stored information without requiring continuous full-bandwidth radio links, thus reducing system cost while maintaining adaptability
2Loss of energy
If portable device with data storage is used for information exchange, then radio bandwidth requirement is reduced, but device complexity increases
Solution Approach 1:
The portable device is designed as a multi-functional unit that combines data storage, communication interface, validation mechanisms, and data processing capabilities. By consolidating these functions into a single device, the system reduces overall complexity compared to having separate dedicated components for each function, while still reducing radio bandwidth requirements through local storage
3Adaptability or versatility
If map data is updated dynamically via radio communication, then track layout changes are reflected immediately, but communication cost increases
Solution Approach 1:
Map data is updated in advance on the portable device before the train departs. The device stores the updated map information locally, allowing immediate reflection of track layout changes without requiring continuous or repeated radio communications. This preliminary update approach maintains adaptability while minimizing communication costs
Data Source
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AI summary
A method of exchanging information between train-carried equipment, said equipment being provided for operation of the train, and a remote location external to said train, comprises the steps of: providing a portable device, said portable device comprising data storage means, data input means for writing data to said data storage means and data output means for outputting data from said data storage means to an external location; providing train connection means at the train-carried equipment enabling communication with said portable device for the exchange of data therewith, the connection means enabling said data exchange when the portable device is correctly located within the train; and providing auxiliary connection means at the remote location enabling communication with the portable device for the exchange of data therewith.