Parking Trajectory Modification for Curb Avoidance
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Solution Overview
Problem
Existing parking assistance systems often result in tire or rim damage during parking maneuvers near curbs due to sudden increases in steering torque and rolling or slipping off the curb.
Innovation Solution
A method and device that detect the curb using ultrasonic, radar, and camera sensors to adjust the parking trajectory, increasing the distance of the tire from the curb to prevent damage, by modifying the trajectory planning to avoid curb contact and minimize maneuvering moves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the parking trajectory is modified to increase the distance of the tire from the curb edge, then the risk of tire and rim damage is reduced, but the number of maneuvering moves required increases
Solution Approach 1:
The system performs preliminary detection of the curb position and edge location before executing the parking maneuver. Based on this advance information, the trajectory is pre-calculated to maintain a safe distance from the curb edge, preventing tire damage before it can occur. This preliminary planning allows the vehicle to complete the parking maneuver in fewer moves by avoiding corrective actions.
Solution Approach 2:
The system continuously monitors the vehicle's position relative to the detected curb during the parking maneuver and dynamically adjusts the trajectory. This feedback mechanism ensures the tire maintains an optimal distance from the curb edge, reducing damage risk while allowing the maneuver to proceed efficiently with minimal adjustments.
2Reliability
If the trajectory planning takes into account the curb position and tire distance, then the parking maneuver reliability is improved, but the device complexity increases
Solution Approach 1:
The system introduces an intermediary trajectory planning module that acts as a mediator between the basic parking control system and the curb detection system. This intermediary layer processes curb position data and translates it into modified trajectory commands, adding intelligence without significantly complicating the overall system architecture. The intermediary handles the complexity of coordinate transformations and safety distance calculations.
Solution Approach 2:
The trajectory planning system is designed to perform multiple functions: basic parking maneuver execution, curb avoidance, and dynamic path adjustment. By making the trajectory planner universal and multi-functional, the system avoids adding separate dedicated systems for each function, thereby managing complexity while improving reliability through integrated curb-aware parking assistance.
3Reliability
If the end position of the maneuver is adjusted to prevent tire contact with the curb edge, then the risk of damage is reduced, but the distance to the parking space increases
Solution Approach 1:
The system dynamically changes the trajectory parameters (such as the end position of the maneuver) based on the detected curb edge location. By adjusting these parameters in real-time, the system maintains a safe distance from the curb while minimizing the impact on the final parking position. The parameter changes are calculated to achieve the safest possible trajectory that still achieves proper parking.
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
Reduces the risk of tire and rim damage, and prevents termination of the parking maneuver by ensuring stable tire positioning on the curb or avoiding curb contact altogether.
Implementation Method 1
detecting a curb disposed in a vicinity of a motor vehicle using ultrasonic sensors
Implementation Method 2
detecting a curb disposed in a vicinity of a motor vehicle using radar sensors
Implementation Method 3
detecting a curb disposed in a vicinity of a motor vehicle using camera sensors
Data Source
AI summary
The present disclosure concerns a method and device that assists a parking maneuver of a motor vehicle. The method and device to assist a parking maneuver of a motor vehicle, with which the motor vehicle is maneuvered into an intended parking space at least partly, automatically, detects a curb bounded by at least one curb edge located in a vicinity of the motor vehicle. A trajectory is determined along which the motor vehicle can be moved into the intended parking space while carrying out at least one move of the maneuver. The trajectory is modified depending on at least one distance between the at least one curb edge and a tire of the motor vehicle that is expected for the trajectory while carrying out the parking maneuver.