Road Height Threshold Detection Using Camera and Lane Geometry
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Solution Overview
Problem
Existing vehicle height sensing technologies, particularly using millimeter-wave radar, suffer from low accuracy in determining the maximum allowed height of roads due to ineffective reflection point data and limited detection precision, which affects driving safety and performance.
Innovation Solution
A method and apparatus utilizing a camera to determine the height threshold of a road based on target objects such as height restriction barriers, underbridges, and tunnel entrances, incorporating lane information and spatial parameters to enhance accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If millimeter-wave radar is used to obtain maximum allowed height of road, then the system can detect reflection point data, but the accuracy of the calculated maximum allowed height is low due to ineffective reflection point data and limited detection precision
Solution Approach 1:
The patent segments the detection task by dividing reflection point data into effective and ineffective categories, then processes only the effective data for height calculation. This segmentation eliminates the negative impact of ineffective data while preserving the useful information, directly resolving the contradiction between data completeness and measurement accuracy.
Solution Approach 2:
The patent introduces an intermediary processing step that identifies and filters effective reflection points before calculating the maximum allowed height. This intermediary mechanism acts as a mediator between the raw radar data and the final height determination, ensuring that only high-quality data influences the measurement accuracy.
2Measurement precision
If millimeter-wave radar with limited detection precision is used, then the system can detect road height information, but the accuracy of the obtained maximum allowed height remains low
Solution Approach 1:
The patent changes the detection parameter from relying on millimeter-wave radar's limited precision to using optical imaging parameters with higher precision. By transitioning to a different detection parameter regime (optical rather than microwave), the system overcomes the inherent precision limitations of the original sensor while maintaining reliable height determination.
Data Source
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AI summary
A method for determining a height of a road target in a driving process and an apparatus are provided and are applied to the field of automated driving or intelligent driving. The method includes: first determining a target object on a road, and determining a height threshold of the road based on the target object, to obtain a maximum allowed height of the road. The method effectively improves accuracy of the obtained maximum allowed height, to improve driving performance. In particular, in a driving process, a height of a road target is effectively monitored, and decision control can be made accordingly. This improves safety of road driving.