Vehicle Headlight Emission Direction Adjustment via Movable Support
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Solution Overview
Problem
Existing automatic headlight adjustment systems are complex and require sophisticated algorithms to precisely adjust the emission direction, especially when dealing with dynamic changes in vehicle pitch angle due to acceleration, braking, or road unevenness, making them difficult to implement with low effort.
Innovation Solution
The acceleration sensor is placed on the movable support part of the headlight, allowing it to move with the lamp device, enabling precise adjustment of the emission direction by controlling the support part's position based on sensor signals, and utilizing existing controller structures to simplify the adjustment process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the acceleration sensor is placed on the movable support part to enable precise adjustment of emission direction, then the measurement precision and adjustment accuracy are improved, but the device complexity increases due to additional mounting requirements and control mechanisms
Solution Approach 1:
The acceleration sensor is mounted on the movable support part itself, allowing it to autonomously measure the pitch angle of the support part without requiring external reference systems. This self-service approach enables the sensor to directly detect the position it needs to control, simplifying the overall system architecture while maintaining high measurement precision for emission direction adjustment.
2Adaptability or versatility
If complex sophisticated algorithms are used to adjust emission direction dynamically, then the adaptability to various vehicle positions is improved, but the computational requirements and processing time increase
Solution Approach 1:
The system establishes a direct feedback loop where the acceleration sensor continuously measures the pitch angle of the movable support part, and the control unit immediately processes this information to adjust the emission direction. This real-time feedback mechanism enables rapid adaptation to vehicle position changes without requiring complex predictive algorithms, reducing computational time while maintaining high adaptability.
Solution Approach 2:
The patent replaces complex mechanical linkage systems with electronic sensing and control. Instead of using mechanical levers and linkages to physically connect the sensor to the support part, the system uses an acceleration sensor mounted directly on the support part with electronic signal processing, significantly reducing mechanical complexity and computation requirements while improving response time.
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
This approach allows for precise and efficient adjustment of the headlight emission direction, maintaining consistency without requiring complex calculations, and can be applied to both static and dynamic systems, ensuring accurate illumination regardless of vehicle position or loading conditions.
Implementation Method 1
An acceleration sensor device (18) disposed on the movable support part (10), in particular on the attachment plate (15), wherein a sensor axis (19) of the acceleration sensor device (18) coincides with the vertical upon a longitudinal acceleration of the motor vehicle (1) equal to zero
Data Source
Figure 1~5
Figure 6~9
AI summary
The invention relates to a headlight (2) for a motor vehicle (1) including a base body (7), a support part (10) movably disposed on the base body (7) for supporting a lamp device (13), wherein by moving the support part (10) relatively to the base body (7), an emission direction (6) of the headlight (2) is adjustable, including an acceleration sensor device (18) for measuring an acceleration along at least a first sensor axis (19), and including an electronic control device for adjusting the emission direction (6) depending on sensor signals of the acceleration sensor device (18), wherein the acceleration sensor device (18) is disposed on the movable support part (10).