On-Board Train Control Power Scheduling for Overnight Stays
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Solution Overview
Problem
There is no method for automatically returning a train to normal operation after an overnight stay, and the charging of batteries in on-board devices is inefficient due to the unknown duration of the overnight stay period.
Innovation Solution
A train control device comprising a ground device and an on-board device that communicate to manage the train's operation state, with the ground device sending overnight stay and operation start time signals to the on-board device, which charges the necessary power and turns off the supply after the required period, enabling efficient battery charging and automatic return to normal operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the power supply of the on-board device is manually turned on after overnight stay, then the train operator must board the train and perform manual operation, but this increases operational time and labor requirements
Solution Approach 1:
The ground device transmits the operation start time signal to the on-board device in advance before the train actually needs to operate. This allows the on-board device to prepare and automatically turn on the power supply at the predetermined time, eliminating the need for manual intervention by the train operator and reducing the time loss from overnight stay to operation start.
2Reliability
If the power supply remains on during overnight stay to maintain wireless train control system operation, then position detection is maintained, but battery power is consumed inefficiently
Solution Approach 1:
Instead of keeping the power supply continuously on during overnight stay, the system implements periodic operation by turning the power supply on only when needed (at the operation start time) and keeping it off during unnecessary periods. This periodic action pattern maintains reliability when required while significantly reducing battery power consumption during overnight stay.
3Adaptability or versatility
If the on-board device operates continuously during overnight stay, then all functions are available, but power consumption increases and battery efficiency decreases
Solution Approach 1:
The system applies different operational states to different time periods: during overnight stay, the power supply is turned off to conserve energy, while at operation start time, the power supply is activated to provide full functionality. This local quality approach allows the device to adapt its functionality availability to the specific operational context, reducing energy waste when full functionality is not needed.
Data Source
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AI summary
The present invention addresses the problem that there has not been provided a method for automatically returning to normal operation when a train has stayed overnight, and that, because the time taken from the start of overnight stay to the start of operation of the train is unknown, a battery mounted in an on-board device cannot be efficiently charged. Accordingly, provided is a train control device provided with a ground device for managing the operation of a train, and an on-board device mounted on the train. The ground device and the on-board device mutually maintain transmission and reception of telegram messages, including during a period in which the operation state of the train is overnight stay. The ground device transmits an overnight stay start instruction signal and an operation start time signal of the train to the on-board device. The on-board device that has received both signals turns off a power supply after power required by the on-board device during the period of overnight stay at least until the operation start time has been charged.