Boundary Line Detection Near Toll Booths
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Solution Overview
Problem
Existing boundary line detecting devices may incorrectly set a virtual line as the boundary in areas with varying lane widths, such as near toll booths, potentially preventing vehicles from accessing available spaces.
Innovation Solution
A boundary line detecting device that includes a paint line detecting unit, a virtual line setting unit, and a setting prohibiting unit, which prevents the virtual line from being set as the boundary line when approaching a toll booth, using the paint line or previously detected boundary line, and outputs deviation risk warnings when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a virtual line is set based on previously detected boundary lines, then the boundary line can be detected when paint lines are not visible, but an erroneous virtual line may be set in areas with varying lane widths such as near toll booths
Solution Approach 1:
The patent applies local quality by making the virtual line setting behavior location-dependent. The system identifies toll booth areas through image recognition and disables virtual line setting specifically in these regions, while allowing it in ordinary areas. This localized adjustment prevents erroneous virtual line setting near toll booths while maintaining the benefit of virtual line continuation in normal conditions.
Solution Approach 2:
The patent inverts the default behavior by prohibiting virtual line setting in specific areas (toll booths) rather than allowing it universally. Instead of assuming virtual line setting is always appropriate, the system starts with the assumption that it may be erroneous in certain locations and uses image recognition to identify and restrict it in those specific cases.
2Ease of operation
If the vehicle is guided by a virtual line when the boundary line cannot be detected, then the vehicle can maintain lane keeping function, but the vehicle may be inhibited from moving to available spaces such as toll booth areas
Solution Approach 1:
The patent makes the boundary line detection system dynamic by adjusting its behavior based on the detected environment. The system automatically switches between virtual line setting and prohibition modes depending on whether a toll booth area is detected, allowing the vehicle to adapt its lane keeping behavior to match the actual road conditions and available spaces.
Data Source
AI summary
In a cruising lane deviation detection system, when a boundary line is detected, a paint line drawn on a road surface to the left and right of an own vehicle is detected and a virtual line is set based on the position of a previously detected boundary line. The boundary line is set using at least either of the paint line and the virtual line. However, approach information indicating that the own vehicle is approaching a toll booth is acquired. When the approach information is acquired, setting of the virtual line as the boundary line is prohibited. Furthermore, whether or not there is risk of the own vehicle deviating from the boundary line is determined. When there is risk of deviation, an output that there is risk of deviation is performed. As a result, setting an erroneous virtual line as the boundary line can be suppressed.