Headlamp Sensor Integration for Pitching Movement Compensation
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Solution Overview
Problem
Existing vehicle illumination systems struggle to maintain a stable cut-off line during pitching movements, leading to potential dazzling of other road users and reduced illumination range due to inadequate compensation for dynamic movements.
Innovation Solution
An illumination device with integrated or attached position and acceleration sensors and a control unit within the headlamp, which quickly adjusts the cut-off line by actuating light sources or mechanical components based on sensor data and predictive information from surroundings recording means, minimizing latency and compensating for pitching movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the position and acceleration sensor as well as the control unit are arranged in or directly on the headlamp, then the transmission time for sensor information is minimized and reaction to pitching movements is quickened, but the device complexity of the headlamp increases
Solution Approach 1:
The patent merges the position/acceleration sensor and control unit with the headlamp assembly by arranging them in or directly on the headlamp. This integration creates a unified system where sensor data is processed locally with minimal transmission delay, directly resolving the time loss issue while accepting increased headlamp complexity as a necessary trade-off for achieving rapid pitching movement compensation
2Object-affected harmful factors
If the cut-off line is adjusted to compensate for pitching movements, then the dazzling of other road users is prevented, but the device complexity increases due to additional sensors and control systems
Solution Approach 1:
The headlamp system performs self-adjustment by using its own integrated sensor and control unit to detect pitching movements and automatically compensate for cut-off line displacement. This self-service capability eliminates the need for external sensor systems, reducing overall device complexity while effectively preventing dazzling of other road users
3Loss of time
If the position and acceleration sensor are integrated in the headlamp, then the signal path is shortened and latency is minimized, but the ease of manufacture decreases
Solution Approach 1:
The patent segments the illumination system into modular components, with the sensor and control unit forming an integrated module within the headlamp assembly. This segmentation allows for standardized manufacturing of the sensor-control module that can be pre-assembled and tested separately, then installed as a unit in the headlamp, thereby reducing latency while maintaining reasonable ease of manufacture
Data Source
AI summary
A vehicle lighting device includes at least one headlight, a position and/or acceleration sensor, and a control unit for adjusting a light/dark boundary of the headlight. Pitch movements of the vehicle can be detected by the position and/or acceleration sensor, and a change in the light/dark boundary due to the respective pitch movement can be compensated for by the control unit. The position and/or acceleration sensor and the control unit are arranged in the headlight or directly on the headlight.