Roadside Detection Using Distance and Reflection Intensity
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Solution Overview
Problem
Conventional roadside detection systems fail to accurately detect road edges without irregularities, such as white lines or road shoulders, as they rely solely on changes in objective distance, leading to missed detections and potential vehicle deviations.
Innovation Solution
A roadside detection system that utilizes both objective distance and reflection intensity to identify road edges by dividing the detection region into separate areas, using first and second edge line detection methods to set boundaries based on distance and intensity differences, enhancing accuracy and detecting both physical and legal road edges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If only objective distance is used for roadside detection, then the detection method is simple, but the detection accuracy is insufficient for roadsides without irregularities
Solution Approach 1:
The patent combines two detection methods: one based on objective distance changes and another based on reflection intensity changes. By merging these two approaches, the system can detect roadsides with irregularities (using distance) and roadsides without irregularities like white lines (using reflection intensity), thereby improving overall detection accuracy without requiring fundamentally complex new technology
Solution Approach 2:
The patent changes the detection parameter from solely objective distance to include both objective distance and reflection intensity. This parameter expansion allows the system to detect different types of roadsides using appropriate parameters, resolving the contradiction between simplicity and accuracy
2Reliability
If multiple detection criteria are used to improve roadside detection accuracy, then the detection reliability is enhanced, but the device complexity increases
Solution Approach 1:
The system merges existing detection technologies (distance measurement and reflection intensity measurement) into a unified roadside detection system. This combination enhances reliability by providing multiple detection criteria while avoiding the need for entirely new complex systems
Solution Approach 2:
The detection system is designed to perform multiple functions: detecting roadsides with irregularities, detecting roadsides without irregularities, and providing reliable detection under various road conditions. This multi-functionality approach improves reliability without proportionally increasing complexity
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
The system effectively detects road edges with high accuracy, including those without irregularities, reducing the risk of vehicle deviation and improving safety by differentiating between physical and legal edges for appropriate driver assistance.
Implementation Method 1
emits light waves or electromagnetic waves to a target detection region in which an object to be measured is detected and acquires a distance to the object to be measured and an intensity of a reflected wave reflected from the object to be measured
Data Source
AI summary
A roadside detection system installed in a vehicle to detect a roadside of a road on which the vehicle travels includes detection results acquiring means, first edge line detecting means and second edge line detecting means. The detection results acquiring means emits light waves or electromagnetic waves to a target detection region in which an object to be measured is detected and acquires an objective distance and a reflection intensity, for each of separate regions obtained by separating the target detection region into a plurality of divisions. The first edge line detecting means detects a first edge line that is a candidate of a roadside based on each objective distance. The second edge line detecting means detects a second edge line that is a candidate of a roadside based on each reflection intensity. A driver assistance system and a roadside detecting method are also provided.