Parking Assist Target Positioning via Overlap Area Logic
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Solution Overview
Problem
Existing parking assist systems face challenges in accurately determining a target position for vehicle parking, as reliance on ultrasonic sensors alone can result in deviation from the parking space, while image-based systems may incorrectly position the vehicle near obstacles.
Innovation Solution
A parking assist system that includes an electronic control unit capable of detecting obstacles and parking space boundaries, setting a target position in a third area where the first area across a limit line from the obstacle and the second area outside the boundary overlap, ensuring a safe and convenient parking position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a target position is determined on the basis of only the detected results of the ultrasonic sensors, then the detection process is simple, but the target position may deviate from a parking space
Solution Approach 1:
The patent combines ultrasonic sensor detection results with image processing results to determine the target position. The electronic control unit integrates data from both ultrasonic sensors and cameras, merging multiple detection methods to achieve accurate target position determination within parking spaces while avoiding obstacles.
2Loss of information
If a target position is determined on the basis of only the images, then the visual information is sufficient, but the target position may be close to an obstacle
Solution Approach 1:
The patent introduces a limit line as an intermediary element that is set at a predetermined distance from the obstacle based on image processing. This limit line acts as a safety boundary, ensuring that the target position is determined not only based on visual information but also maintaining a safe distance from obstacles.
3Device complexity
If the target position is determined without considering the overlap area, then the determination process is simple, but it is difficult to determine a target position at a less inconvenient position
Solution Approach 1:
The patent identifies a specific third area where the first area (across the limit line from the obstacle) and the second area (within the parking space boundary) overlap. This local region with special properties is designated as the optimal target position area, ensuring both safety from obstacles and convenience for parking operations.
Data Source
AI summary
A parking assist system includes an electronic control unit. The electronic control unit is configured to detect an obstacle, detect a boundary of a parking space, determine a target position to which a vehicle moves, and, when the vehicle is allowed to be located in a third area in which a first area and a second area overlap with each other, be allowed to determine the target position in the third area. The first area is an area across a limit line from the obstacle. The limit line is set substantially along an outer periphery of the obstacle at a position spaced a predetermined distance from the obstacle outward of the obstacle. The second area is an area out of the boundary.