Headlight Misalignment Detection Using Car2Car Dazzle Reports
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Solution Overview
Problem
Existing methods for detecting and correcting the incorrect position of headlights in vehicles fail to provide directional information, leading to suboptimal illumination and increased driving safety risks due to the widening of the safety region in both directions of the dazzled vehicle.
Innovation Solution
A method utilizing a single sensor, such as a driver assistance camera, to detect dazzling events and transmit information via Car2Car communication, allowing the dazzling vehicle to determine and correct the incorrect headlight position by calculating the offset required for future adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single sensor is used to detect dazzling events, then device complexity is reduced, but directional information for determining incorrect headlight position is lost
Solution Approach 1:
The patent uses Car2Car communication as an intermediary to transfer directional information from the dazzled vehicle to the dazzling vehicle. The dazzled vehicle's sensor detects the light flasher signal direction and communicates this information to the dazzling vehicle, allowing the dazzling vehicle to determine its headlight position error without requiring multiple sensors in each vehicle.
2Reliability
If the safety region is widened in both directions to account for incorrect headlight position, then detection reliability is improved, but illumination quality deteriorates
Solution Approach 1:
The patent segments the masking approach by direction. Instead of uniformly widening the masked region in both directions, the system determines the specific direction of headlight misalignment and applies masking only in the affected direction. This targeted approach maintains detection reliability while preserving illumination quality in the opposite direction.
3Measurement precision
If directional information is obtained through Car2Car communication, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent implements a self-service approach where the dazzled vehicle uses its own sensor to detect and measure the direction of the light flasher signal, then communicates this self-measured directional information to the dazzling vehicle. This eliminates the need for the dazzling vehicle to have complex directional sensing capabilities, as it receives ready-to-use measurement data from the other vehicle.
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
Enables precise detection and correction of headlight misalignment, ensuring optimal illumination and improved driving safety by directing the correction in the appropriate direction, rather than widening the masked region in both directions.
Implementation Method 1
dazzling in the dazzled vehicle caused by the oncoming dazzling vehicle is detected by an optical sensor in the dazzled vehicle
Data Source
AI summary
A method for reporting dazzling caused by a headlight system of a dazzling oncoming vehicle by means of a message produced by the dazzled vehicle that dazzling has been detected, wherein the message contains information relating to a position of the dazzled vehicle at the time of the detected dazzling. The method, also can proceed from the message, for determining an incorrect position of the headlight system of the dazzling vehicle by a comparison between a first intersection point between the trajectory of the oncoming dazzled vehicle and a light field produced by the headlight system of the dazzling vehicle, and a second intersection point between the trajectory of the oncoming dazzled vehicle and a model, stored in the vehicle system, of the light field generated by the headlight system of the dazzling vehicle.