Matrix Headlamp Calibration Using Camera-Detected Glare
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Solution Overview
Problem
Current methods for calibrating matrix headlamps in vehicles are time-consuming, costly, and require high-precision optical measuring equipment, with static calibrations that do not adapt to dynamic changes over the vehicle's lifetime, leading to potential dazzling of oncoming traffic due to installation tolerances and material fatigue.
Innovation Solution
A method using a vehicle camera to record images of signs and determine their location in the vehicle coordinate system, adjusting the light intensity of headlamp segments to detect glare effects, allowing for dynamic calibration of the headlamp position relative to the vehicle, which can be performed during normal driving without external measuring equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional optical measuring equipment is used for calibration, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent uses a camera to capture images of the headlamp beam pattern on a target surface, creating a visual copy of the light distribution. This image-based approach replaces complex optical measuring equipment while maintaining calibration accuracy through digital image analysis of the beam pattern characteristics
Solution Approach 2:
The patent replaces mechanical/optical measuring systems with an electronic imaging system. The camera-based method captures the headlamp beam pattern and uses image processing to determine calibration parameters, substituting physical measurement devices with electronic detection and computational analysis
2Manufacturing precision
If static calibration is performed during production, then manufacturing precision is improved, but adaptability to dynamic changes deteriorates
Solution Approach 1:
The patent enables dynamic calibration by allowing the headlamp position to be adjusted and recalibrated during the vehicle's operational life. The system can detect changes in headlamp position due to material fatigue or installation shifts and perform realignment procedures to maintain accurate beam patterns despite temporal changes
Solution Approach 2:
The patent implements a feedback mechanism where the camera continuously monitors the headlamp beam pattern and compares it against reference values. Based on this feedback, the system can detect deviations caused by aging or environmental factors and trigger recalibration procedures to restore proper alignment
3Measurement precision
If manual calibration procedures are used, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The patent implements an automated calibration system where the camera captures the beam pattern, the control unit automatically analyzes the image to determine segment borders and position deviations, and the system self-adjusts calibration parameters without requiring manual intervention. This self-service approach maintains precision while dramatically reducing calibration time
Solution Approach 2:
The patent enables continuous calibration monitoring during normal vehicle operation. The system can perform calibration checks and adjustments without requiring the vehicle to be removed from service, maintaining continuous operational capability while ensuring accurate headlamp alignment
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 enables simple, accurate, and cost-effective calibration of matrix headlamps, reducing the risk of dazzling oncoming traffic by adapting to changes over time, thereby enhancing road safety and eliminating the need for complex recalibration processes.
Implementation Method 1
at least a first image of a sign located in an environment of the motor vehicle is recorded by means of a camera of the motor vehicle
Data Source
AI summary
The present disclosure relates to a method for calibrating a position of a matrix headlamp of a motor vehicle by means of a camera of the motor vehicle, wherein the matrix headlamp has a plurality of segments controllable independently of one another for light emission. At least one first image of a sign is recorded by means of the camera, a location area in which the sign is arranged is determined, illuminance of a first segment is changed, at least one second image is recorded and checked, whether a change in a glare effect detected on the basis of the at least one recorded second image has occurred, and if so, the position of the matrix headlamp is calibrated depending on the first segment and position information derived from the location area.