Automatic Parking Path Correction for Close-Wall Parking
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Solution Overview
Problem
Conventional parking assistance systems may fail to accurately park a vehicle close to a wall due to insufficient distance control, leading to potential collisions during automatic parking.
Innovation Solution
A parking assistance device that corrects a travel path based on teacher traveling to ensure the vehicle's target position is closer to a structure defining the parking area, with a path curvature smaller than a threshold, and includes a correction module to generate a path that avoids collisions by maintaining a longer straight path near the wall.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the vehicle is controlled to pull over to park closer to the wall, then the parking position accuracy is improved, but the risk of collision with the wall increases due to control errors
Solution Approach 1:
The system performs preliminary correction of the travel path before execution. The correction unit adjusts the target travel path in advance by calculating a corrected path that maintains a larger distance from the wall, anticipating potential control errors during actual vehicle movement. This preliminary adjustment prevents collision while still achieving accurate parking positioning.
Solution Approach 2:
The system applies beforehand cushioning by intentionally increasing the safety margin distance between the vehicle and the wall in the corrected travel path. This cushioning effect accounts for potential control deviations during automatic parking, ensuring that even with control errors, the vehicle maintains sufficient clearance from the wall to avoid collision.
2Reliability
If the travel path is corrected to maintain larger distance from the wall, then the collision risk is reduced, but the parking position accuracy deteriorates
Solution Approach 1:
The correction unit performs preliminary adjustment of the travel path by calculating the optimal balance between safety margin and parking accuracy. It determines a corrected path that maintains adequate distance from the wall while still achieving the desired parking position, resolving the contradiction before the actual parking maneuver begins.
3Device complexity
If the automatic parking system uses a simple path following approach, then the system complexity is reduced, but the ability to handle control errors and ensure safe parking deteriorates
Solution Approach 1:
The system implements feedback by using the actual vehicle position and the pre-calculated corrected travel path to guide the parking maneuver. The correction unit generates a path that inherently accounts for control errors, and the vehicle follows this corrected path with real-time position monitoring, ensuring safe parking without requiring complex real-time error compensation mechanisms.
Data Source
AI summary
A parking assistance device according to the present disclosure performs automatic traveling of a vehicle based on teacher traveling by a user, and includes a memory and a processor coupled to the memory. The processor is configured to: cause the memory to store information about a travel path in the teacher traveling; correct the travel path in order that a position of a target position of the automatic traveling in a vehicle width direction is closer to a structure defining a parking area configured to park the vehicle and a path to the target position having a curvature smaller than a threshold is kept longer, according to a relative positional relationship between the structure and a start position of the automatic traveling on the travel path; and control the vehicle based on the corrected travel path.