Driving Assistance Apparatus Boundary Line Reliability Control
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Solution Overview
Problem
Existing driving assistance systems face reliability issues in recognizing boundary lines on roads with gradients, lane changes, intersections, and unerased lines, leading to inadequate driving assistance and potential vehicle drifting or abrupt course changes.
Innovation Solution
A driving assistance apparatus that includes an image acquiring unit, a boundary line recognizing unit, a road information acquiring unit, and a degree-of-reliability setting unit, which acquires and processes images from a monocular camera, recognizes boundary lines, and adjusts driving assistance based on road information such as gradient, lane changes, and unerased lines to set the reliability level of boundary line recognition, thereby varying the control content of driving assistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If white-line recognition is performed based on captured images, then driving assistance can be provided, but the reliability decreases on roads with gradients or complex conditions
Solution Approach 1:
The system changes the parameter of reliability degree based on road gradient information. When the road gradient exceeds a threshold, the reliability degree is reduced, which adjusts the system's response to boundary line recognition results accordingly, preventing inappropriate driving assistance on steep roads
Solution Approach 2:
Road gradient information acts as an intermediary factor that mediates between the boundary line recognition results and the driving assistance control. This intermediary information allows the system to adjust its behavior based on road conditions without directly modifying the recognition algorithm
2Ease of operation
If the steering angle is controlled to maintain lane position, then driving assistance is provided, but vehicle drifting or abrupt course changes may occur when recognition reliability is low
Solution Approach 1:
The steering angle control is made dynamic by adjusting it according to the reliability degree. When reliability is high, normal steering control is applied; when reliability is low (such as on roads with gradients), the steering control is modified or restricted, preventing abrupt course changes and vehicle drifting
3Device complexity
If boundary line recognition is performed without considering road information, then the system is simple, but appropriate driving assistance cannot be provided on roads with gradients
Solution Approach 1:
The system segments the driving assistance function into multiple components: boundary line recognition, road gradient detection, reliability degree calculation, and conditional steering control. This segmentation allows the system to add road information processing without completely redesigning the overall system, maintaining relative simplicity while improving reliability
Data Source
AI summary
In a driving assistance apparatus, an image acquiring unit acquires a captured image captured by an onboard camera. Based on the captured image acquired by the image acquiring unit, a boundary line recognizing unit recognizes a boundary line that demarcates a traffic lane in which an own vehicle is driving. A road information acquiring unit acquires road information related to a road on which the own vehicle is driving. Based on the road information acquired by the road information acquiring unit, a degree-of-reliability setting unit sets a degree of reliability of the boundary line recognized by the boundary line recognizing unit. Based on the boundary line recognized by the boundary line recognizing unit, a driving assisting unit performs driving assistance of the own vehicle and varies control content of the driving assistance based on the degree of reliability.