Parking Assist Target Positioning via Obstacle Height Differentiation
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Solution Overview
Problem
Existing parking assist systems face challenges in determining a suitable target position within a parking space when obstacles, such as sprags, are present, as they struggle to balance distance and overlap requirements effectively.
Innovation Solution
A parking assist system and method that utilize an electronic control unit to detect obstacles and determine a target position where the vehicle is spaced at a predetermined distance from taller obstacles and overlaps with lower obstacles, ensuring safe and convenient parking by setting candidate positions based on obstacle heights and parking boundaries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle is spaced at a predetermined distance from all obstacles to ensure safety, then collision risk is reduced, but the available parking positions become limited and parking convenience deteriorates
Solution Approach 1:
The patent applies local quality by differentiating obstacle response based on obstacle height. For obstacles higher than a predetermined height (e.g., curbs, walls), the system maintains a predetermined distance to ensure safety. For obstacles lower than the height threshold (e.g., sprags, low protrusions), the system allows the vehicle to overlap with the obstacle position. This localized differentiation resolves the contradiction by applying strict distance maintenance only where necessary for safety while allowing flexibility where obstacles pose minimal risk.
2Reliability
If the system avoids all obstacles by maintaining predetermined distance, then safety is improved, but the number of available target positions decreases and parking efficiency worsens
Solution Approach 1:
The patent changes the parameter of distance maintenance based on obstacle height. When obstacle height exceeds the predetermined threshold, the system enforces a predetermined distance constraint. When obstacle height is below the threshold, the system removes the distance constraint and allows overlap. This parameter-based differentiation enables the system to identify more valid target positions by excluding only those that pose genuine safety risks, thereby improving parking efficiency without compromising safety.
3Device complexity
If the system determines target position without considering obstacle height differentiation, then system complexity is reduced, but accuracy in determining suitable parking positions deteriorates
Solution Approach 1:
The patent introduces local quality by implementing height-based differentiation in obstacle processing. The system compares each detected obstacle's height against a predetermined threshold and applies different position determination rules accordingly. This selective approach improves target position accuracy by accounting for the varying risk levels of different obstacle types, while avoiding the need for overly complex uniform processing of all obstacles.
Data Source
AI summary
A parking assist system includes an electronic control unit. The electronic control unit is configured to detect an obstacle. The electronic control unit is configured to determine a target position of a moving path of a vehicle. The electronic control unit is configured to determine the target position at a position at which the vehicle is spaced at least a predetermined distance from the obstacle higher than a first threshold and the vehicle overlaps with the obstacle lower than the first threshold.