Road Paver Seat-Mounted Subgrade Lighting for Glare Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing road paver cab lighting systems cause glare and visibility issues for operators and nearby individuals, impairing the operator's ability to monitor the paving process, especially at night.
Innovation Solution
A lighting unit is mounted no more than 140 cm above the floor of the main control station, directing at least 60% of its light output onto the floor surface, with a downward inclination to provide diffuse illumination, and is shielded to prevent direct glare.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If cab lighting is positioned high and shines from above into the operator's area, then the operator is directly illuminated and visible from outside, but this causes workers and passing road users to be dazzled and the operator to feel observed and unable to concentrate
Solution Approach 1:
The lighting system provides different illumination qualities in different directions: downward-facing lights illuminate the operator's area and control panel, while sideways-facing lights illuminate the surrounding work area. This directional differentiation ensures local illumination needs are met without causing harmful glare to external persons.
Solution Approach 2:
The lighting unit is integrated into the cab structure with multiple light sources arranged in a nested configuration within the same housing, allowing compact placement of both upward-facing and sideways-facing lights without increasing external visibility of the lighting system.
2Illumination intensity
If cab lighting is positioned high and shines from above, then the operator is directly illuminated, but this creates considerable differences in brightness between the cab and surroundings, causing the operator's eyes to adapt to cab brightness and reduce vision in darker areas around the paver
Solution Approach 1:
The lighting system provides different illumination qualities in different directions: downward-facing lights illuminate the operator's area and control panel, while sideways-facing lights illuminate the surrounding work area. This directional differentiation ensures local illumination needs are met without causing harmful glare to external persons.
Solution Approach 2:
Instead of single upward-facing lights, the system introduces sideways-facing light sources that illuminate the surrounding area laterally. This adds a new illumination dimension that reduces brightness contrast between the cab interior and exterior, preventing eye adaptation issues while maintaining operator visibility.
3Illumination intensity
If lighting is positioned to illuminate the operator area, then the operator is visible from outside, but this reduces operator privacy and increases safety concerns
Solution Approach 1:
The lighting system provides different illumination qualities in different directions: downward-facing lights illuminate the operator's area and control panel, while sideways-facing lights illuminate the surrounding work area. This directional differentiation ensures local illumination needs are met without causing harmful glare to external persons.
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
Reduces operator visibility from outside, minimizes glare for nearby individuals, and enhances operating comfort and safety by ensuring adequate illumination without direct glare.
Implementation Method 1
a lighting unit (31), which is arranged no more than 140 cm higher than a floor surface (17) of the main control station (13) with respect to a vertical direction (35). The lighting unit (31) is arranged such that at least 60 percent of the light output emitted by the lighting unit (31) falls onto the floor surface (17) of the main control station (13)
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The road paver (1) comprises a material hopper (7) for receiving paving material, a screed (11) for compacting paving material, a main operator station (13) with an operator platform (55) and a seating unit (51) with a seat (19) for an operator, wherein the seating unit (51) is movable between a first position in which the seat (19) is located at least substantially within one width of the operator platform (55) and a second position in which the seat (19) projects laterally beyond the operator platform (55), and a subgrade lighting (57) which is attached to the seating unit (51) and is configured to illuminate the subgrade in the second position of the seating unit (51).