Automated Driver Assistance Calibration Using Chassis Geometry Measurement
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Solution Overview
Problem
Current methods for calibrating and adjusting driver assistance systems in motor vehicles at the end of the assembly line are inefficient and prone to errors, particularly in aligning the systems with the actual direction of travel, which can lead to dangerous malfunctions due to imprecise calibration.
Innovation Solution
A device that conveys and positions the vehicle using a hanger system, allowing for precise measurement and adjustment of the body coordinate system and dynamic driving axis, enabling fully automated calibration and adjustment of driver assistance systems, including the use of calibration targets and data transmission for accurate alignment and leveling of vehicle lights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If driver assistance systems are calibrated manually or with separate adjustment stands, then calibration can be performed, but the process is time-consuming and prone to errors due to multiple measurement steps
Solution Approach 1:
The patent combines the chassis geometry measurement stand (FWS) and the driver assistance system calibration stand into a single integrated system. The FWS measures the body coordinate system and dynamic driving axis, while the calibration stand uses these measurements directly for calibrating driver assistance systems, eliminating the need for separate measurement processes and reducing calibration time
Solution Approach 2:
The chassis geometry measurement (FWS) is performed first to determine the body coordinate system and dynamic driving axis parameters. These pre-measured values are then directly utilized in the subsequent driver assistance system calibration process, avoiding redundant measurements and streamlining the overall calibration workflow
2Ease of operation
If separate adjustment stands are used for chassis geometry and driver assistance systems, then each can be adjusted independently, but the overall process complexity increases and coordination between adjustments becomes difficult
Solution Approach 1:
The patent merges the chassis geometry measurement stand and driver assistance system calibration stand into one integrated system. The control unit coordinates both measurement and calibration processes, reducing the number of separate devices needed and simplifying the overall adjustment process while maintaining the ability to perform both functions
Solution Approach 2:
The integrated system serves multiple functions: it measures chassis geometry, determines the body coordinate system, calculates the dynamic driving axis, and calibrates driver assistance systems all within a single device. This multi-functional approach reduces the need for multiple specialized stands and improves operational coordination
3Measurement precision
If the body position is not precisely known in the global coordinate system, then headlight and driver assistance system alignment becomes inaccurate, but remeasuring the body position adds time and complexity
Solution Approach 1:
The patent combines the body position measurement function into the integrated chassis geometry measurement stand (FWS). The FWS already determines the body coordinate system and its position in the global coordinate system as part of the chassis geometry measurement, eliminating the need for separate body position measurement processes and reducing overall complexity
Data Source
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AI summary
The device has a conveying unit provided for conveying a motor vehicle in a suspension gear. A positioning and fixing unit is provided for positioning and fixing the suspension gear. A measuring unit is provided for measuring a position of a car body coordinate system of the motor vehicle in a coordinate system of the device. A calibrating and adjusting unit calibrates and adjusts a driver assistance system (2) in consideration of a position of a dynamic drive axle with respect to the car body coordinate system of the motor vehicle.