In-Car Display Power Storage for Railway Emergency Continuity
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Solution Overview
Problem
In railway cars, existing information display systems cannot continue to provide necessary information to passengers during power outages caused by the stop of power supply from overhead wires, such as during natural disasters or accidents.
Innovation Solution
An in-car information display system that includes a power storage device, like a storage battery, to supply direct-current power to display devices, allowing them to operate independently of the overhead wire power supply, and a terminal device that manages information delivery to these displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If display devices operate using power from overhead wires, then normal information provision is achieved, but information provision stops when power supply from overhead wire is interrupted
Solution Approach 1:
The power storage device accumulates electrical energy in advance during normal operation when overhead wire power is available. This preliminary energy storage enables the display devices to continue operating during power interruptions without immediate failure, thus improving reliability while managing energy usage.
Solution Approach 2:
The power storage device acts as an intermediary between the overhead wire power supply and the display devices. It buffers the power supply, storing energy when available and releasing it when the overhead wire power is interrupted, thereby decoupling the display devices from direct dependency on overhead wire power.
2Duration of action of stationary object
If power storage device supplies power to all display devices, then information provision continues, but battery capacity depletes quickly
Solution Approach 1:
The control device selectively controls which display devices receive power from the power storage device during power interruptions. Instead of supplying power to all display devices simultaneously, it provides power to essential or prioritized displays, thereby extending the operational duration while managing battery capacity consumption more effectively.
Solution Approach 2:
The system dynamically adjusts power distribution based on real-time conditions. The control device monitors battery status and actively reconfigures which display devices are powered, transitioning from a static all-or-nothing power supply approach to a dynamic, condition-based power allocation strategy that optimizes both duration and energy efficiency.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables continuous guidance and advertisement displays even when the overhead wire power is stopped, reducing power consumption and extending the display duration based on the battery's residual capacity, ensuring passengers receive critical information during emergencies.
Implementation Method 1
a power storage device (8) including a storage battery (81) charged with direct-current power obtained by converting electric power from an overhead wire
Implementation Method 2
a plurality of display devices (5A) that operate by receiving supply of direct-current power from the power storage device (8)
Data Source
AI summary
An in-car information display system includes a power storage device including a storage battery charged with direct-current power obtained by converting electric power from an overhead wire, a plurality of display devices that operate by receiving supply of direct-current power from the power storage device and provide a guidance display related to a service of a train to passengers, and a terminal device that operates by receiving the supply of the direct-current power from the power storage device and delivers to the display devices information for guidance display that is information used for the guidance display. The power storage device switches a power supply operation to the display devices according to a residual capacity of the storage battery and reduces a total amount of electric power supplied to each of the display devices.