Train Position Recovery After Dormancy Without Backup Batteries
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Solution Overview
Problem
The use of large storage batteries to power core train-mounted equipment during dormancy periods increases train weight and reduces available space, impacting user experience in fully automatic operation (FAO) systems.
Innovation Solution
A method involving receiving device identification information from positioning devices in a dormancy area and storing it in a non-volatile memory before dormancy, allowing the train to disconnect power and use this information to determine its position upon waking, eliminating the need for large batteries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large capacity storage battery is provided on the train to ensure non-interrupted power supply during long dormancy periods, then the power supply reliability is improved, but the train weight increases and the available space decreases
Solution Approach 1:
The patent applies preliminary action by storing device identification information from positioning devices in non-volatile memory before the train enters dormancy mode. This pre-stored information enables the train to determine its position after waking up without requiring continuous power supply, thus resolving the contradiction between power supply reliability and train weight by eliminating the need for large capacity storage batteries during dormancy periods
2Reliability
If a large capacity storage battery is provided on the train to ensure non-interrupted power supply during long dormancy periods, then the power supply reliability is improved, but the available space on the train decreases
Solution Approach 1:
The patent applies preliminary action by storing device identification information from positioning devices in non-volatile memory before the train enters dormancy mode. This pre-stored information enables the train to determine its position after waking up without requiring continuous power supply, thus resolving the contradiction between power supply reliability and available space by eliminating the need for large capacity storage batteries during dormancy periods
3Measurement precision
If the core train-mounted equipment is powered normally during the dormancy period to monitor train movement and update positioning information, then the positioning accuracy is improved, but the energy consumption increases
Solution Approach 1:
The patent applies preliminary action by storing device identification information from positioning devices in non-volatile memory before the train enters dormancy mode. This pre-stored information enables the train to determine its position after waking up without requiring continuous power supply to monitoring equipment, thus resolving the contradiction between positioning accuracy and energy consumption by allowing the train to use pre-stored information instead of continuous monitoring during dormancy
Solution Approach 2:
The patent applies copying by using the pre-stored device identification information as a copy of the positioning data, which can be used after the train wakes up without needing to re-acquire the information through continuous monitoring. This copying approach resolves the contradiction between positioning accuracy and energy consumption by eliminating the need for continuous power supply to monitoring equipment during dormancy periods
Data Source
AI summary
A train positioning method includes acquiring first device identification information at an antenna; acquiring train positioning information; after determining the first device identification information is trustworthy, storing the first device identification information and the positioning information in a non-volatile memory; after awakening the train from dormancy mode, receiving second device identification information using the antenna; according to the received second device identification information and the first device identification information from the memory, determining whether, after being awakened, the train is at the same position as before entering dormancy mode; upon determining that, after awakening, the train is at the same position as before entering dormancy mode, determining the current position and direction of the train match positioning information in the memory, and completing positioning of the train. This ensures the usage experience of users of a train. An apparatus, a system, and a computer-readable medium are also provided.