Driver Assistance Lane Recognition Using Radar Reflectors
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Solution Overview
Problem
Existing driver assistance systems face limitations in lane recognition due to visual delays and sensitivity to changes in lane conditions, particularly in high population density areas with factors like direct sunlight and road dust, which can lead to performance issues in lane keeping assist functions.
Innovation Solution
A driver assistance system that utilizes a combination of radar and camera data to determine lanes, where radar data is used for objects farther away and image data for closer objects, with a controller determining lane reflectors based on energy magnitude to improve accuracy and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If camera is used for lane recognition, then visual information can be obtained, but visual delays and sensitivity to changes in lane conditions occur due to direct sunlight and road dust
Solution Approach 1:
The patent combines radar and camera systems to detect lane markers. The radar detects lane markers by emitting radio waves and receiving reflected waves, while the camera captures visual images. By merging the detection results of both systems, the patent achieves reliable lane recognition that overcomes the limitations of using either system alone, particularly in adverse conditions like direct sunlight and road dust.
2Reliability
If radar is used for lane recognition, then detection can be performed regardless of visual conditions, but radar alone may not provide sufficient accuracy for lane determination
Solution Approach 1:
The patent merges radar and camera detection systems to achieve both reliability and precision in lane recognition. The radar provides reliable detection under various environmental conditions, while the camera enhances accuracy by providing visual confirmation. The controller integrates data from both sensors to determine lane markers with high reliability and precision.
3Adaptability or versatility
If LKAS is made sensitive to changes in lanes in near and far areas, then lane change detection capability is improved, but performance limitations occur due to longer recognition time
Solution Approach 1:
The radar system continuously scans and detects lane markers in advance at both near and far distances, preparing lane change detection information before visual confirmation is needed. This preliminary detection by radar reduces the overall recognition time while maintaining the ability to detect lane changes in various areas.
Solution Approach 2:
The patent combines radar's early detection capability with camera's visual confirmation to achieve fast and accurate lane change detection. The radar provides initial detection information, and the camera verifies the lane marker changes, reducing total recognition time while maintaining high adaptability to lane changes in near and far areas.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances lane recognition accuracy and reduces performance limitations by leveraging radar data for distant lanes and image data for closer lanes, providing effective lane information for improved driver assistance functions like lane departure warning and lane keeping assistance.
Implementation Method 1
a radar configured to emit radio wave in front of the vehicle and obtain radar data by receiving reflected wave reflected from an object in front of the vehicle
Implementation Method 2
determine whether the object is the radar reflector based on the magnitude of energy of the reflected wave included in the obtained radar data
Data Source
AI summary
A driver assistance system (DAS) configured to determine a lane provided with a radar reflector includes a radar configured to emit radio wave in front of the vehicle and obtain radar data by receiving reflected wave reflected from an object in front of the vehicle; a controller configured to determine whether the object is the radar reflector based on the magnitude of energy of the reflected wave included in the obtained radar data, and to determine a line connecting the determined radar reflector as a lane. It is an object of the present invention to provide a driver assistance system and a driver assistance method capable of obtaining lane information based on a radar track.