Parking Space Orientation Detection via Contour Line Analysis
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Solution Overview
Problem
Existing parking assistance systems often fail to accurately determine the orientation of a parking space until the vehicle is about to enter it, leading to potential aborts if the space is unsuitable, especially when objects delimiting the space are not parallel.
Innovation Solution
A method using a sensor device to detect contour points of objects while driving past a parking space, calculating contour lines based on these points to determine the orientation of the space before the parking process, allowing for precise characterization of the space type and dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If contour points are detected only when the vehicle is driving into the parking space, then the parking process can start quickly, but the orientation of the parking space is determined too late and may require aborting the process
Solution Approach 1:
The sensor device detects contour points of objects delimiting the parking space while the motor vehicle is driving past the parking space, before the parking maneuver is initiated. This preliminary detection allows the orientation to be determined in advance, enabling the system to characterize the parking space type (parallel, diagonal, perpendicular) and dimensions before committing to the parking process, thus avoiding late-stage aborts.
2Productivity
If the vehicle enters the parking space before determining orientation, then the parking process is faster, but the space may be unsuitable leading to process abort
Solution Approach 1:
The system performs preliminary characterization of the parking space by detecting contour points and calculating orientation while the vehicle is still approaching. This allows suitability assessment to be completed before the vehicle enters the parking space, ensuring that only appropriate spaces are selected while maintaining efficient parking process speed.
3Measurement precision
If contour lines are calculated from detected contour points, then precise orientation determination is achieved, but the computational complexity increases
Solution Approach 1:
The control device calculates contour lines representing side boundaries of the parking space from detected contour points while the vehicle is driving past. This preliminary calculation of orientation and space characteristics enables precise determination of parking space geometry before the parking maneuver begins, allowing the system to accurately classify space type and dimensions without adding complexity to the actual parking execution.
Data Source
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AI summary
The invention relates to a method for characterizing a parking space (3) bounded by two objects (7, 8) for a motor vehicle (1), in which contour points of the objects (7, 8) are detected by means of a sensor device (4) of the motor vehicle (1) during a drive (F) of the motor vehicle (1) past the parking space (3) and an orientation of the parking space (3) relative to the motor vehicle (1) is determined on the basis of the contour points, wherein first contour points (17) of a first of the objects (7) are detected on an inner side (13) facing the parking space (3) and extending along a depth direction (T) of the parking space (3) and/or on an outer side (11) facing away from the parking space (3) and extending along the depth direction (T) of the parking space (3) and a first contour line (18) is determined on the basis of the first contour points (17).In a second object (8), second contour points (20) are detected on an outer surface (12) facing away from the parking space (3) and extending along the depth direction (T) of the parking space (3) and/or on an inner surface (14) facing the parking space (3) and extending along the depth direction (T) of the parking space (3), and a second contour line (21) is determined based on the second contour points (20), and the orientation of the parking space (3) is determined based on the orientation of the first contour line (18) and the second contour line (21). The invention also relates to a parking assistance system (2) and a motor vehicle (1).