Forklift Road Projection Using Counter-Motion Warning Images
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Solution Overview
Problem
Conventional image projection techniques on vehicle road surfaces cause display information to move with the vehicle, making it difficult for pedestrians to recognize.
Innovation Solution
An industrial vehicle with a detection unit to determine its traveling direction and speed, generating an animation image with display information moving opposite to the vehicle's direction, and projecting it onto a predetermined area on the road surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If display information is projected onto the road surface to notify pedestrians of vehicle presence and direction, then visibility and awareness are improved, but the display information moves with the vehicle making it difficult to recognize
Solution Approach 1:
The patent applies inversion by making the projection system move in the opposite direction to the vehicle's travel. The projection unit projects display information that moves backward relative to the vehicle's forward motion, creating a stationary visual effect for pedestrians. This resolves the contradiction by counteracting the vehicle's movement to maintain information stability.
Solution Approach 2:
The system dynamically adjusts the projection based on real-time vehicle speed and position data from the detection unit. The animation image's movement characteristics are continuously modified to maintain the stationary appearance effect, allowing the system to adapt to changing vehicle conditions while preserving the core function of stable information display.
2Loss of information
If animation image is projected to make display information appear fixed, then recognition is improved, but projection system complexity increases
Solution Approach 1:
The projection unit serves multiple functions: it projects the animation image, controls the projection timing, and coordinates with the detection unit to synchronize display content with vehicle state. By making the projection system multi-functional, the patent reduces overall system complexity while achieving the stationary display effect.
Solution Approach 2:
The system uses the vehicle's own detection data (speed and direction) to automatically generate and adjust the animation image parameters. The detection unit's output directly controls the projection characteristics, creating a self-regulating system that reduces external control complexity while maintaining accurate stationary display.
Data Source
AI summary
A forklift (industrial vehicle) includes a travel control unit (detection unit) that detects a traveling direction and a traveling speed of the own vehicle, a generation unit that generates an animation image in which display information moves at the traveling speed in a direction opposite to the traveling direction, and a projection unit that projects the animation image onto a predetermined projection area on a road surface around the own vehicle.