Road Surface Marking Projection for Trailer Glare Control
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Solution Overview
Problem
The interference of an optical image projected onto a road surface at a vehicle-rear position with a towed vehicle, and the potential for glare due to reflected light, when a vehicle tows a trailer.
Innovation Solution
A vehicle-mounted road surface marking device with a projection device and controller that adjusts the distance and shape of the optical image based on whether a towing device is engaged, reducing interference by shortening the rear end of the image when towing is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the optical image is projected to the vehicle-rear position to indicate traveling direction, then the visibility and guidance function is improved, but interference with the towed vehicle occurs and glare may be generated
Solution Approach 1:
The projection device dynamically adjusts the projection distance based on whether a towed vehicle is detected. When towing is detected, the projection distance is shortened to prevent the optical image from overlapping with the towed vehicle. When towing is not detected, the projection distance is extended to improve visibility and guidance function. This dynamic adjustment resolves the contradiction between visibility and interference prevention.
Solution Approach 2:
The system changes the projection parameter (projection distance) based on the towing state. By detecting whether a towed vehicle is present and adjusting the projection distance accordingly, the system optimizes both visibility and prevents harmful interference or glare, resolving the technical contradiction between these two opposing requirements.
2Object-affected harmful factors
If the optical image is projected closer to the vehicle to avoid interference with towed vehicle, then interference is reduced, but the visibility and guidance effectiveness deteriorates
Solution Approach 1:
The projection device dynamically adjusts the projection distance based on whether a towed vehicle is detected. When towing is detected, the projection distance is shortened to prevent the optical image from overlapping with the towed vehicle. When towing is not detected, the projection distance is extended to improve visibility and guidance function. This dynamic adjustment resolves the contradiction between visibility and interference prevention.
Solution Approach 2:
The system changes the projection parameter (projection distance) based on the towing state. By detecting whether a towed vehicle is present and adjusting the projection distance accordingly, the system optimizes both visibility and prevents harmful interference or glare, resolving the technical contradiction between these two opposing requirements.
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 interference and glare by controlling the optical image's distance and shape relative to the vehicle, ensuring it does not overlap with the towed vehicle, thereby enhancing visibility and safety.
Implementation Method 1
projects an optical image located at a vehicle-rear position of the vehicle onto a road surface on which the vehicle travels
Data Source
AI summary
A vehicle includes a towing device that is provided at a rear portion of the vehicle and tows a towed vehicle, a projection device that projects an optical image located behind the vehicle with respect to the vehicle, onto a road surface on which the vehicle travels, and a controller that controls the projection device such that a distance between a rear end portion of the optical image and the vehicle in a traveling direction of the vehicle is shortened when the towing device tows the towed vehicle as compared with when the towing device does not tow the towed vehicle.