Vehicle Lamp Position Calibrator Using Luminance Deviation
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Solution Overview
Problem
Existing vehicle lamp systems using Adaptive Driving Beam (ADB) technology face challenges in accurately detecting positional deviations between cameras and headlights, leading to potential glare issues due to overengineered high-precision light distribution control, which compromises the effectiveness of glare reduction.
Innovation Solution
A vehicle lamp system that includes a camera, a controller, a headlight, and a position calibrator to detect positional deviations by using reference objects and measuring luminance changes, allowing for precise calibration of the light distribution pattern to prevent glare.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the mounting position precision of the camera and headlight is improved, then the light distribution control precision is improved, but the device complexity and calibration difficulty increase
Solution Approach 1:
The system performs self-calibration by automatically detecting the positional deviation between camera and headlight using image processing and luminance measurement, eliminating the need for manual calibration procedures and external calibration equipment
Solution Approach 2:
The system uses feedback from the camera to detect the actual light distribution pattern and compares it with the intended pattern, then automatically adjusts the light distribution control based on the detected positional deviation to maintain precision
2Reliability
If a wide margin of light-off area is set to prevent glare, then the reliability of glare prevention is improved, but the productivity and effectiveness of high-precision light distribution control is reduced
Solution Approach 1:
The system replaces the mechanical approach of setting fixed wide margins with an automated optical detection and control system that dynamically adjusts light distribution based on actual positional deviation, substituting physical oversizing with intelligent control
Solution Approach 2:
The system changes the parameter of light distribution control from fixed wide margins to dynamically adjusted boundaries based on detected positional deviation, allowing the light-off area to be optimized rather than overly conservative
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 effectively detects and calibrates positional deviations between the camera and headlight, ensuring accurate light distribution patterns that minimize glare to drivers and pedestrians, maintaining high-precision control while preventing overengineering.
Implementation Method 1
detecting a reference object on a road based on the image information and measuring a luminance of the reference object
Data Source
AI summary
A vehicle lamp system includes a camera which generates image information in a front region, a controller which generates a light distribution command for instructing a light distribution pattern based on the image information, a headlight which irradiates the front region such that the instructed light distribution pattern is obtained, and a position calibrator which detects a positional deviation between the camera and the headlight. The position calibrator detects a reference object based on the image information and measures a luminance of the reference object, and when there is a certain difference between a luminance of the reference object obtained from one light distribution pattern and a luminance of the reference object obtained from another light distribution pattern in which a light quantity of only a part is different from the one light distribution pattern, detects the positional deviation using a position of the part.