Headlamp Auto-Leveling With Camera-Laser Road Gradient Sensing
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Solution Overview
Problem
Existing headlamp leveling systems fail to accurately detect road inclines and lateral gradients, leading to inaccurate light irradiation due to ignoring tire pressure and height differences, and failing to adjust light direction based on uphill or downhill road conditions.
Innovation Solution
An automatic leveling system integrating a camera sensing part and a laser sensing part with a controller to collect image and sensing information, allowing for accurate adjustment of the lamp module's aiming based on long-distance and short-distance measurements, including detection of road inclines and gradients, ensuring precise light irradiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a mechanical sensor is used to detect suspension change for headlamp leveling, then the system can adjust light radiating direction, but tire pressure and height difference are ignored causing deterioration of light irradiation position accuracy
Solution Approach 1:
The patent combines multiple sensing methods (image capturing device for long-distance road surface detection and laser sensor for short-distance measurement) with the headlamp leveling system. This integration allows the system to consider multiple factors including road gradient, tire pressure effects, and height differences, thereby resolving the contradiction between automation and measurement precision by merging multiple detection functions into one system.
2Extent of automation
If an acceleration sensor is used to predict vehicle posture based on gravity direction, then the system can adjust headlamp aiming, but changes in vehicle body inclination on uphill or downhill roads are not detected
Solution Approach 1:
The patent introduces an image capturing device as an intermediary that directly observes the road surface condition and vehicle posture relative to the road, rather than relying solely on gravity-based acceleration sensors. This intermediary provides accurate detection of uphill/downhill conditions by capturing visual information about the road gradient, thereby resolving the reliability issue while maintaining automatic adjustment capability.
3Device complexity
If the light irradiation position is fixed on the ground, then the headlamp structure is simple, but it is difficult to obtain sufficient light quantity according to road surface conditions
Solution Approach 1:
The patent implements dynamic adjustment of the headlamp light radiating direction based on detected road conditions. The headlamp structure includes movable components that can change the irradiation angle and position automatically according to road gradient and vehicle posture, thereby maintaining sufficient illumination intensity on the road surface while avoiding excessive structural complexity through controlled dynamic adjustment mechanisms.
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
The system achieves improved accuracy and reliability in light irradiation by integrating sensors to scan the road surface and adjust the lamp module's position accordingly, preventing aiming accuracy deterioration from camera mounting states.
Implementation Method 1
a camera sensing part collecting image capturing information about a front of a mobility device using an image capturing device
Implementation Method 2
a laser sensing part collecting sensing information according to an object in front of the mobility device and a road surface condition using a laser sensor
Data Source
AI summary
Disclosed are an automatic leveling system and a method for a headlamp, which accurately detects whether a road is uphill or downhill, and a lateral gradient condition of the road. The system and method also automatically adjust a light radiating direction through the headlamp according to the road. Further, a sensor capable of scanning a road surface and a lamp module radiating light are integrated with each other, so a light irradiation position is accurately and rapidly adjusted according to a road condition, thus improving the accuracy and the reliability of the light irradiation position. Further, as the light irradiation position of a headlamp is adjusted by comparing image capturing information obtained through an image capturing device with sensing information obtained through a laser sensor, the deterioration of the aiming accuracy due to the mounting state of a camera is prevented.