Parking Space Recognition Using Virtual Line Angle Detection
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Solution Overview
Problem
Existing parking assist systems often misidentify the type of parking space due to reliance on the vehicle's moving direction, leading to incorrect identification of angle or perpendicular parking.
Innovation Solution
A parking space recognition system that determines parking type based on the shapes of parking space lines, using a virtual line calculation unit, angle calculation unit, and parking type determining unit to set provisional parking spaces, preventing misidentification by analyzing the angle between the virtual line and parking space lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the parking type is determined based on the vehicle's moving direction and the angle between the moving direction and parking space lines, then the parking space recognition system can identify parking spaces, but misidentification occurs when the angle becomes substantially 90 degrees causing angle parking to be misidentified as perpendicular parking
Solution Approach 1:
The patent introduces a virtual line connecting the road side ends of adjacent parking space lines as an intermediary reference. Instead of directly measuring the angle between the vehicle's moving direction and parking space lines, the system calculates the angle between the virtual line and parking space lines. This intermediary virtual line serves as a stable reference that remains consistent regardless of the vehicle's approach angle, thereby preventing misidentification when the vehicle approaches perpendicular to angle parking spaces.
2Ease of operation
If the system uses the angle between the vehicle's moving direction and parking space lines to determine parking type, then the system can operate with simple detection, but the detection accuracy deteriorates when the vehicle approaches from different directions
Solution Approach 1:
Instead of measuring the angle between the vehicle's moving direction and parking space lines (the conventional approach), the patent inverts the reference frame by using the angle between the virtual line (connecting road side ends of parking space lines) and the parking space lines. This inversion of the reference approach ensures that the measurement remains accurate regardless of the vehicle's approach direction, as the virtual line's orientation is determined solely by the parking space geometry rather than the vehicle's movement.
Data Source
AI summary
A parking space recognition system includes an external environment information acquiring device and a parking space candidate detecting device. The parking space candidate detecting device includes: a virtual line calculating unit configured to calculate a virtual line connecting road side ends of parking space lines adjacent to each other; an angle calculating unit configured to calculate an angle between the virtual line and one of the parking space lines; a parking type determining unit configured to determine a parking type; and a parking space candidate setting unit configured to set at least one provisional parking space in an area between the parking space lines based on positions of the parking space lines, and to set an available parking area among the provisional parking space to the parking space candidate.