Alternating LED Groups in Handrail Sidewalk Lighting
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Solution Overview
Problem
Conventional sidewalk lighting systems in tunnels suffer from unlit sections when a light band fails, as they rely on a continuous power supply and lack redundancy, compromising safety and maintenance efficiency.
Innovation Solution
The implementation of a pavement lighting system with at least two groups of LEDs, each with its own power supply unit, where lamps from different groups alternate along the handrail, ensuring that if one group fails, the other group's lamps remain functional, maintaining uninterrupted lighting with minimal gaps and reduced maintenance effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a continuous strip of light with closely spaced LEDs is used, then the lighting continuity is improved, but the reliability deteriorates because a single defect causes a long unlit section
Solution Approach 1:
The light band is divided into multiple independently powered sections, each with its own power supply unit. When one section fails, others remain operational, preventing complete lighting failure. This segmentation resolves the contradiction by maintaining lighting continuity through modular sections while improving reliability through independent failure isolation.
Solution Approach 2:
Redundant power supply units are pre-installed in each section to cushion against potential failures. Each section has its own power supply capability, so when one fails, the system is already prepared to maintain operation in other sections, preventing complete lighting failure and maintaining continuity.
2Reliability
If multiple power supply units are used for different groups of lamps, then the reliability is improved through redundancy, but the device complexity increases
Solution Approach 1:
The handrail lighting system is segmented into multiple independent sections, each with its own power supply unit. This modular approach distributes the complexity across manageable units rather than requiring a single complex centralized power system, making the overall system easier to install and maintain while providing redundancy.
Solution Approach 2:
Each section of the handrail is equipped with local power supply capability rather than relying on a distant centralized power source. This local quality approach allows each segment to operate independently, improving reliability while keeping each individual section simple and manageable.
3Illumination intensity
If light sources are arranged at short distances to ensure continuous lighting, then the lighting uniformity is improved, but the maintenance effort increases due to more components
Solution Approach 1:
The light band is segmented into modular sections with standardized spacing and power supply units. This segmentation allows for easier maintenance as individual sections can be replaced as complete modules rather than dealing with individually spaced LEDs, reducing maintenance complexity while maintaining uniform lighting through proper section placement.
Solution Approach 2:
Instead of spacing LEDs at maximum intervals to reduce numbers, the system uses slightly closer spacing within modular sections that can be easily replaced. This partial excess action maintains good lighting uniformity while the modular design simplifies maintenance, as entire sections can be quickly swapped rather than individually adjusting or replacing multiple LEDs.
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
This design provides continuous and reliable lighting with minimal gaps, even if one group fails, reducing maintenance and installation costs while ensuring safety and efficiency.
Implementation Method 1
lights (3), in particular with light-emitting diodes (5a, 5b), which are arranged in the handrail (2)
Implementation Method 2
LEDs that form the lighting means of the sidewalk lighting
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The sidewalk light has groups of light units (5a,5b) provided with multiple light units. The group of light units supplies electrical energy by a separate power supply unit. The groups of light units follow to each other on a longitudinal direction (8) of a handrail (2) at different light units.