Rail Vehicle Light Strip for External Visibility
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Solution Overview
Problem
Conventional railway vehicle headlights do not provide sufficient external visibility in poor visibility conditions, increasing the risk of collisions with pedestrians, especially in areas where pedestrians are present near tracks.
Innovation Solution
A railway vehicle equipped with a light strip extending over at least 50% of its side faces and powered by a photovoltaic module, featuring a light source such as LEDs or OLEDs, which matches the vehicle's shape to enhance visibility in dark conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional headlights are used on railway vehicles, then the front area can be illuminated for the driver, but the external visibility of the entire vehicle is insufficient in poor visibility conditions
Solution Approach 1:
The patent transitions from point-source headlights illuminating only the front area to a linear light strip extending along the side faces of the vehicle. This dimensional change from 0D/2D illumination to 1D linear illumination along the vehicle profile enables pedestrians to see the entire length and shape of the vehicle, dramatically improving external visibility and reducing collision risk.
Solution Approach 2:
The light strip can emit light in different colors or color patterns to enhance visibility. By using visible light wavelengths that are easily detectable by the human eye, particularly in dark or poor visibility conditions, the vehicle profile becomes clearly distinguishable against the background, reducing the harmful effect of undetected vehicles.
2Illumination intensity
If a light strip extending over 50% of side face length is installed, then vehicle visibility is significantly improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The light strip is implemented as a flexible, thin-film structure that can be easily conformally attached to the side faces of the vehicle. This flexible film design simplifies installation compared to rigid lighting structures, allowing the light strip to adapt to the vehicle's contours while maintaining the required 50% coverage length for effective visibility.
Solution Approach 2:
The light strip follows and copies the contour and shape of the vehicle's side faces, creating a visual representation of the vehicle profile. This copying approach ensures that the light strip naturally adapts to the vehicle geometry, simplifying the attachment process while effectively outlining the vehicle's shape for enhanced visibility.
3Use of energy by moving object
If a photovoltaic module is used as power supply, then energy autonomy is improved, but the device complexity increases due to additional components
Solution Approach 1:
The photovoltaic module serves multiple functions: it generates electrical energy to power the light strip, provides structural mounting support for the light source, and can potentially serve as part of the vehicle's external surface integration. This multi-functionality reduces the need for separate mounting structures and simplifies the overall power supply system architecture.
Solution Approach 2:
The patent combines the power supply function (photovoltaic module) with the lighting function (light strip) into an integrated system. The photovoltaic module is positioned to directly power the light strip, creating a self-contained energy-generating and energy-consuming unit that reduces wiring complexity and enables energy autonomy for the visibility system.
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
The light strip significantly increases the external visibility of the railway vehicle, effectively communicating its size and shape, reducing the risk of collisions by illuminating its entire profile rather than just the front area.
Implementation Method 1
the power supply unit comprises a photovoltaic module attached to the outside of the railway vehicle
Implementation Method 2
The light source includes a light emitting diode or an organic light emitting diode
Implementation Method 3
The light source includes a light emitting diode or an organic light emitting diode
Data Source
Figure 1
Figure 2~3
AI summary
This railway vehicle (1) comprises front (100) and rear (102) ends and side faces (104) and a light strip (3), fixed to the outside of the railway vehicle (1) and comprising a light source. The light strip (104) is fixed to at least one of the front (100) and rear (102) ends and to the side faces and extends, on each of the side faces (104), over at least 50% of that side face's length.