Headlamp Leveling Assembly With Tilting Sensor for Slope Accuracy
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Solution Overview
Problem
Current headlamp leveling systems for vehicles fail to accurately adjust light emission positions due to neglecting tire pressure and height differences, and are unable to recognize changes in vehicle body gradients on slopes, leading to inaccuracies in light distribution.
Innovation Solution
A leveling apparatus integrating a tilting sensor and light source module within a headlamp housing, where the tilting sensor detects road gradients and adjusts the light emission angle using a rotational mechanism, ensuring accurate light distribution by tilting the light source module and sensor together, minimizing mechanical noise through friction or belt operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a mechanical sensor mounted on a trailing arm is used to detect suspension changes, then the leveling system can adjust light emission direction based on vehicle body gradient, but the system cannot recognize tire pressure and height difference changes, leading to deterioration in light emission position accuracy
Solution Approach 1:
The patent combines the tilting sensor and light source module into a single integrated assembly that tilts together as one unit. This merging ensures that the sensor and light source maintain a fixed relative position, eliminating measurement errors caused by differential movement while preserving the ability to detect vehicle body gradient changes.
Solution Approach 2:
The patent introduces a tilting mechanism as an intermediary between the vehicle body and the light source module. This intermediary component allows the light source to be adjusted independently of the vehicle body position, compensating for tire pressure and height differences while maintaining accurate gradient detection.
2Adaptability or versatility
If an acceleration sensor is used to predict vehicle posture in gravitational direction, then the system can adjust light emission direction, but the system cannot recognize changes in vehicle body gradient on slopes, causing inability to control light emission position
Solution Approach 1:
The patent replaces acceleration sensors that predict vehicle posture with a tilting sensor that directly measures the actual vehicle body gradient. This substitution eliminates the indirect prediction method and provides direct, accurate measurement of the gradient, enabling precise control of light emission position on slopes.
3Measurement precision
If the tilting sensor and light source module are integrated and tilt together, then control for adjusting light emission position is simplified and accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent integrates the tilting sensor and light source module into a single assembly that tilts together, eliminating the need for separate mounting mechanisms and reducing overall system complexity despite the functional integration. This merging simplifies control by ensuring both components respond identically to vehicle body movements.
Data Source
AI summary
A leveling apparatus for a vehicle headlamp includes: a housing disposed at a front side of a vehicle; a light source module disposed in the housing to emit light; a tilting sensor disposed in the housing to detect an inclination degree of a road; a tilting means to tilt the light source module and the tilting sensor together; and a controller. The controller receives a signal detected by the tilting sensor and controls the tilting means based on the inclination degree of the road to adjust a light emission angle of the light source module. In addition, the tilting sensor operates until a sensed output of the tilting sensor reaches a normal range.