Driver Assistance System Radar Region of Interest Adjustment
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Solution Overview
Problem
Rear-view radar sensors in vehicles have a fixed field of view, which can lead to late or missed detection of vehicles on entrance ramps due to their angle relative to the road being entered, as these vehicles often fall outside the predefined region of interest.
Innovation Solution
A driver assistance system that uses camera and navigation data to detect entrance ramps and automatically adjust the region of interest for radar data, shifting the azimuth angle of the virtual optical axis to include the road to be entered, ensuring vehicles on the ramp are detected earlier and more effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fixed region of interest is defined in the radar sensor's field of view, then object detection is simplified and processing is efficient, but vehicles on entrance ramps appear outside the region of interest and cannot be detected early
Solution Approach 1:
The patent applies the dynamics principle by making the region of interest adjustable rather than fixed. The processing device dynamically modifies the region of interest based on detected entrance ramps, shifting it toward the ramp's direction to maintain detection coverage while preserving processing efficiency. This resolves the contradiction by allowing the system to adapt the detection region to different driving scenarios.
Solution Approach 2:
The patent implements parameter changes by modifying the region of interest's parameters (position, orientation, or boundaries) in response to detected entrance ramps. The processing device changes the region of interest parameters to include the ramp area, enabling early detection of vehicles on ramps while maintaining efficient processing through targeted region adjustment rather than full-field analysis.
2Device complexity
If the radar sensor uses a predefined fixed field of view, then the sensor structure is simple and cost-effective, but it cannot adapt to different road configurations like entrance ramps
Solution Approach 1:
The patent applies dynamics by enabling the region of interest to be dynamically adjusted based on road configuration detection. The processing device receives navigation data about upcoming roads and entrance ramps, then dynamically shifts the region of interest to appropriate areas, allowing the simple fixed sensor structure to achieve adaptive detection coverage through software-based region modification.
Solution Approach 2:
The patent uses navigation data and road configuration information as an intermediary between the fixed radar sensor and the detection requirements. The processing device mediates by combining navigation data with radar data to determine an adjusted region of interest, allowing the simple sensor structure to achieve versatility through intelligent data fusion and region adjustment.
3Ease of operation
If the region of interest remains fixed aligned with the vehicle's main axis, then the system is easy to operate and control, but vehicles on angled entrance ramps fall outside the detection region
Solution Approach 1:
The patent applies dynamics by making the region of interest adjustable based on detected entrance ramps. The processing device automatically modifies the region of interest's orientation or position to align with the ramp's angle, maintaining ease of operation through automatic adjustment while improving detection accuracy for vehicles on angled ramps.
Solution Approach 2:
The patent implements feedback by using navigation data about road configurations to automatically adjust the region of interest. The system receives feedback about upcoming entrance ramps from navigation data and automatically modifies the detection region accordingly, maintaining operational simplicity while improving detection precision through closed-loop adaptation.
Data Source
Figure 1
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AI summary
The invention provides a driver assistance system for a vehicle, comprising an interface and a processing device. The interface is configured to receive radar data from a rear-view radar sensor of the vehicle, camera data from a camera sensor of the vehicle, and navigation data from a navigation system of the vehicle. The processing device is configured to detect an entrance ramp to a road to be entered, based on the camera data and the navigation data, and to determine a region of interest associated with the radar data. The processing device is further configured to automatically adjust the region of interest associated with the radar data based on the detection of the entrance ramp.