Vehicle Road Surface Drawing Control for Interference-Free Target Detection
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Solution Overview
Problem
Vehicles equipped with in-vehicle lamps for road surface drawing can interfere with camera detection of targets, leading to inaccurate or erroneous target detection due to overlapping light patterns.
Innovation Solution
A control system that switches the road surface drawing light to a blinking state and adjusts the target detection period to avoid interference, ensuring accurate target recognition by synchronizing the detection timing with the light's OFF state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the road surface drawer performs continuous road surface drawing with the imager continuously acquiring captured images, then the visibility of the drawn pattern is maintained, but the camera may fail to detect the target properly or may erroneously detect the target due to the influence of the drawing light
Solution Approach 1:
The patent applies periodic action by switching the drawing light between ON and OFF states in synchronization with the image acquisition cycle. The controller is configured to acquire captured images only during the OFF state of the drawing light, creating a periodic detection window that eliminates interference from the drawing light while maintaining continuous road surface drawing capability. This temporal separation ensures that target detection occurs during periods when the drawing light is not active, thereby preventing erroneous detection.
2Speed
If the detection period of the target detector is shortened to improve detection speed, then the response time is reduced, but the detection timing may coincide with the drawing light ON state causing detection errors
Solution Approach 1:
The patent synchronizes the detection period with the periodic ON/OFF cycling of the drawing light. The controller acquires captured images at specific intervals that correspond to the OFF state of the drawing light, ensuring that detection occurs during interference-free periods. This coordinated periodic operation maintains high detection speed while avoiding detection errors by strategically timing acquisitions during the OFF state windows.
Solution Approach 2:
The controller pre-configures the detection timing to occur during the OFF state of the drawing light before the actual detection takes place. By anticipating the light cycle and scheduling image acquisition during the predetermined OFF periods, the system ensures that detection always occurs under optimal conditions without requiring real-time adjustment during the detection process.
Data Source
AI summary
In a control system for a vehicle including a target detector, a road surface drawer, and a controller, the controller is configured to, when the target detector detects a target in a road surface drawing area that is an irradiation area of drawing light while the road surface drawer is performing road surface drawing, switch radiation of the drawing light by the road surface drawer from an ON state to a blinking state in which the ON state and an OFF state are repeated at a predetermined first period, and switch a detection period of the target detector to a second period that is an integral multiple of the first period to adjust a detection timing for the target to a timing at which the drawing light is brought into the OFF state.