Road Finisher Control Stand Lighting to Reduce Operator Glare
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Solution Overview
Problem
Existing road finisher lighting systems cause blinding and visibility issues for operators and surrounding individuals due to direct illumination from above, affecting the operator's ability to concentrate and monitor the paving process, especially at night.
Innovation Solution
A road finisher with a main control stand featuring a lighting unit mounted no more than 140 cm above the floor area, directing at least 60% of its light output onto the floor, and oriented to avoid direct blinding, with optional opaque shields to prevent glare and adjustable luminosity and color.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If driver's cab lighting is positioned high and shines from above into the operator's area, then the operator is well illuminated and visible, but workers and passing road users may be blinded and the operator may feel observed and unable to concentrate
Solution Approach 1:
The lighting unit is inverted or repositioned to shine upward onto the roof instead of downward onto the operator. The roof acts as a reflector to distribute light indirectly, eliminating direct glare while maintaining illumination. This inverts the conventional lighting direction to solve the blinding problem.
Solution Approach 2:
The roof serves as an intermediary element between the lighting unit and the operator's workspace. Light from the lighting unit reflects off the roof surface and indirectly illuminates the control stand area, preventing direct exposure to the light source while maintaining adequate lighting levels.
2Illumination intensity
If driver's cab lighting is positioned high above the operator, then the operator area is illuminated, but considerable brightness differences arise between the cab and surroundings, reducing the operator's ability to see darker areas
Solution Approach 1:
The lighting system is designed to provide localized illumination specifically for the control stand area where the operator needs to work, rather than uniformly illuminating the entire cab. This focused local lighting reduces brightness differences with the surrounding darker areas, allowing the operator to maintain visibility of both the control elements and the external environment.
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
Enhances operator visibility and reduces the likelihood of blinding, allowing for improved ease of use and safer operation, especially at night, by providing diffuse illumination and minimizing direct glare.
Implementation Method 1
A road finisher with a main control stand which provides an operating location for an operator on the road finisher
Data Source
AI summary
The road finisher comprises a material hopper for receiving paving material, a screed for compacting paving material, and a main control stand which provides an operating location for an operator on the road finisher. The main control stand comprises a floor area. The road finisher comprises a lighting unit. The lighting unit is no more than 140 cm higher with respect to a vertical direction than the floor area of the main control stand. The lighting unit is arranged such that at least 60 percent of the light output emitted by the lighting unit during operation falls onto the floor area of the main control stand.