Parking Path Selection for Fewer Direction Changes
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Solution Overview
Problem
Existing parking assistance devices have a low success rate for completing parking, often resulting in vehicles being too far from the target position and requiring excessive direction changes between forward and reverse driving, making them unsuitable for specific circumstances or user needs.
Innovation Solution
A parking assistance device that computes and selects between first and second parking paths based on evaluation functions, allowing vehicles to be parked efficiently by determining reachable paths and candidate connection positions, using single-side or S-turn steering maneuvers to align with parking spaces on the side of a road.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a computed guidance path is used for parking assistance, then the vehicle can reach a target position along the guidance path, but the success rate of completion of parking is low and the vehicle is located too far away from the target parking position
Solution Approach 1:
The system dynamically adjusts the parking path computation by incorporating real-time sensor data and vehicle state information. The control unit modifies the guidance path based on actual parking progress, obstacle detection, and vehicle dynamics, enabling adaptive path optimization that improves both accuracy and success rate
Solution Approach 2:
The system implements continuous feedback loops where sensor data from ultrasonic sensors, cameras, and vehicle state sensors are fed back to the control unit. This feedback mechanism allows the system to monitor parking progress, detect deviations from the planned path, and make real-time corrections to achieve accurate positioning and improve completion success rate
2Adaptability or versatility
If the parking process involves too many switching of the direction of vehicle travel between forward drive and reverse drive, then the vehicle can navigate complex parking scenarios, but the parking process requires a long time
Solution Approach 1:
The system performs preliminary path planning by computing multiple candidate parking paths before execution. The control unit evaluates these pre-computed paths based on criteria including number of direction changes, path length, and feasibility, selecting the optimal path that minimizes time while maintaining adaptability to the specific parking scenario
Solution Approach 2:
The system dynamically optimizes the parking path during computation and execution by considering vehicle dynamics, spatial constraints, and parking goal requirements. This dynamic optimization enables the system to find efficient paths with minimal direction changes while still adapting to complex parking scenarios
3Device complexity
If the vehicle is located too far away from the target parking position while being parked, then the parking path may be simpler to compute, but the parking assistance is not suitable for given circumstances or user's needs
Solution Approach 1:
The system applies local quality optimization by adjusting path computation parameters and evaluation criteria based on the specific parking scenario and user needs. Different weighting factors and constraints are applied locally to prioritize accuracy, time efficiency, or simplicity depending on the circumstances, making the system adaptable while managing computation complexity
Data Source
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AI summary
An object of the present invention is to provide a parking assistance device capable of computing a parking path that is suitable for given circumstances or user's needs. A parking assistance device (1) of the present invention is a parking assistance device (1) for assisting in parking a vehicle V in a parking space (20) provided on one side of a road (21), the parking assistance device (1) being configured to compute a first parking path (31) for starting moving the vehicle (V) forward from the initial position (P0) thereof, and a second parking path (41) for starting moving the vehicle (V) backward from the initial position (P0) thereof, select one of the first parking path (31) or the second parking path (41) on the basis of a preset evaluation function, and set the selected path as a parking path to be used.