Parking Support Device Oblique Approach Correction
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Solution Overview
Problem
Existing parking support devices face difficulties in automatically parking a vehicle side by side along the side surface of obstacles, such as rectangular columns, when the vehicle is obliquely positioned relative to the parking frame, as they assume a parking direction based on a straight line section exceeding a threshold, leading to inefficient parking maneuvers.
Innovation Solution
A parking support device equipped with an acquisition circuit, analysis circuit, setting circuit, and correction circuit that acquires detection points, divides them into groups, calculates approximate straight lines and variations, and corrects the parking direction using weighted second approximate straight lines to ensure appropriate vehicle attitude during side-by-side parking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the parking direction is determined based on a straight line section exceeding a threshold, then the parking support device can automatically determine a parking direction, but the vehicle cannot be parked side by side along the side surface of obstacles when the vehicle is obliquely positioned
Solution Approach 1:
The patent divides detection points into multiple groups based on spatial distribution, with each group corresponding to a different obstacle or surface. This segmentation allows the system to analyze each group independently and determine the appropriate parking direction based on the specific geometric characteristics of each obstacle group, rather than using a single global straight line threshold.
Solution Approach 2:
The patent applies different criteria for different detection point groups. For groups corresponding to planar surfaces (like rectangular columns), the system uses the orientation of that specific surface to determine parking direction. This local quality approach allows the system to adapt to different obstacle geometries and achieve proper side-by-side parking alignment.
2Adaptability or versatility
If the parking direction is set based on the longest straight line section, then the system can handle various obstacle configurations, but it cannot reliably park alongside rectangular columns when the vehicle approaches at an oblique angle
Solution Approach 1:
The patent performs preliminary classification of detection points into groups before determining parking direction. By pre-organizing detection points based on their spatial relationships and geometric patterns, the system can identify which groups correspond to planar surfaces and apply appropriate orientation criteria, thereby improving measurement precision before the actual parking direction determination.
Solution Approach 2:
The patent replaces the simple mechanical threshold-based straight line detection with a more sophisticated computational geometry approach. Instead of merely measuring the length of straight line sections, the system uses vector mathematics, coordinate transformations, and geometric fitting to determine the orientation of detection point groups, enabling accurate parking direction determination for oblique approaches.
Data Source
AI summary
A parking support device includes: an acquisition circuit configured to acquire first detection points related to obstacles around a vehicle before setting a parking direction, and acquire second detection points related to the obstacles after setting the parking direction; an analysis circuit configured to calculate first approximate straight lines and first variations for first detection point groups related to the first detection points, and calculate second approximate straight lines and second variations for second detection point groups related to the second detection points; a setting circuit configured to set a parking point based on the first detection points, and set the parking direction based on the first approximate straight lines and the first variations; and a correction circuit configured to correct the parking direction using a correction amount calculated using the second approximate straight lines weighted based on the second variations after setting the parking direction.