Vehicle Lane Keeping Using Laser Curbstone Detection
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Solution Overview
Problem
Existing vehicle lane-keeping and lane-deviation prevention systems face challenges with image-based traffic recognition due to backlight issues, leading to misrecognition and inaccurate steering control, especially in variable road environments where right lane information may not be acquired.
Innovation Solution
An apparatus and method that utilize a combination of an image photographing device mounted vertically on the vehicle's left end to capture traffic lane information and a distance measuring device using laser technology on the right end to detect curbstone information, integrated with GPS and a road information database to generate a virtual traffic lane, calculating steering values for precise lane control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If image-based traffic recognition is used for travelling control, then traffic lane information can be extracted, but misrecognition occurs due to backlight issues
Solution Approach 1:
The system divides the traffic recognition task into two independent parts: left lane recognition using image processing and right lane recognition using distance measurement. This segmentation allows each method to operate in its optimal condition without being affected by backlight issues that plague the other.
Solution Approach 2:
The patent introduces curbstone information as an intermediary element to bridge the gap between left and right lane detection. By detecting the curbstone position on the right side and combining it with the left lane image data, the system can infer the complete traffic lane position without directly imaging the right lane, thus avoiding backlight problems.
2Adaptability or versatility
If only left traffic lane information is used for steering control, then the system can operate in one-way lanes and variable road environments, but the vehicle may break away from the traffic lane due to insufficient information
Solution Approach 1:
The system merges three different information sources: left traffic lane image data, right curbstone distance measurement, and GPS-based road information database data. By combining these multiple sources, the system achieves both versatility in handling various road types and precision in traffic lane position determination.
Solution Approach 2:
The patent transitions from two-dimensional image-based lane detection to a three-dimensional approach by incorporating distance measurement data and GPS positional information. This multi-dimensional data fusion enables accurate lane keeping even when traditional image-based right lane detection fails.
3Loss of information
If a camera is used to photograph the road, then traffic lane information can be obtained, but images cannot be normally photographed due to backlight
Solution Approach 1:
The system extracts only the necessary traffic lane information from the left side image without attempting to capture the entire road scene. By focusing solely on the left lane markings and combining this with other data sources, the system avoids the need to photograph against backlight conditions.
Solution Approach 2:
The patent replaces the mechanical/optical system of photographing the right lane with an electronic/informational system that uses distance measurement and database lookup. Instead of using light to detect the right lane (which fails under backlight), the system uses electronic distance measurement and computational inference.
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
This solution effectively prevents lane-deviation and ensures safe travel by accurately recognizing traffic lanes even in variable environments, addressing misrecognition and non-acquisition issues through the use of curbstone information for enhanced control.
Implementation Method 1
a distance measuring device using laser technology on the right end to detect curbstone information
Data Source
AI summary
The present invention relates to an apparatus for keeping a traffic lane and preventing lane-deviation for a vehicle that controls a steering direction and a steering amount so as for the vehicle to keep the traffic lane by using information on a left traffic lane of a vehicle while travelling and information on a curbstone provided at a right side of the vehicle and a method thereof.