Rear-Side Sensor Fusion for Radar Multipath Occlusion Correction
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Solution Overview
Problem
Existing vehicle detection systems fail to properly function when faced with multi-path excessive detection targets due to vehicles and lateral side occlusions, impacting driving stability and safety.
Innovation Solution
A vehicle external detection device equipped with an imaging device and radar device, which overlap detection regions, includes an imaging occlusion occurrence detection device to identify occlusions and a correction device to adjust radar position information, using image and map information to correct radar targets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If radar device is used to detect objects, then detection range is extended, but excessive detection targets occur due to multi-path reflection from lateral side vehicles
Solution Approach 1:
The imaging device serves as an intermediary to verify radar detections. When the imaging device detects an occlusion object that blocks the radar's line of sight to a distant object, the system uses this intermediate information to correct or eliminate false radar targets, thereby maintaining detection range while improving accuracy.
Solution Approach 2:
The system implements feedback by continuously comparing radar detection results with imaging device observations. When discrepancies are detected (such as occlusion objects blocking radar paths), the imaging data provides feedback to correct the radar position information, eliminating excessive detection targets while preserving the extended detection range.
2Measurement precision
If imaging device is used to detect occlusions, then occlusion detection accuracy is improved, but system complexity increases due to multiple sensors
Solution Approach 1:
The imaging device performs multiple functions: it detects occlusion objects, verifies radar targets, and provides positional correction data. By making the imaging device multi-functional, the system achieves high occlusion detection accuracy without proportionally increasing overall system complexity, as one component serves multiple purposes.
Solution Approach 2:
The system merges the functions of radar detection and imaging verification into a unified detection framework. By combining these sensor types and their processing algorithms into an integrated system, the patent achieves improved occlusion detection accuracy while managing system complexity through unified architecture rather than separate independent systems.
3Reliability
If correction device adjusts radar position information, then excessive detection targets are removed, but response time increases due to additional processing
Solution Approach 1:
The system performs preliminary action by continuously monitoring and comparing radar and imaging data in real-time. Occlusion detection and correction are initiated proactively before excessive detection targets can significantly impact system performance, reducing the effective response time needed for correction while maintaining high detection accuracy.
Solution Approach 2:
When occlusion is detected, the system rushes through the correction process by directly adjusting radar position information based on imaging data without extensive re-processing. This streamlined correction approach minimizes the time penalty for improving detection accuracy, quickly eliminating excessive detection targets once occlusion is identified.
Data Source
AI summary
A vehicle external detection device is provided. An imaging device and a radar device are mounted in a vehicle and configured to detect a rear lateral side of the vehicle. Detection regions of the imaging device and the radar device are overlapped with each other. The vehicle external detection device includes an imaging occlusion occurrence detection device and a correction device. The imaging occlusion occurrence detection device is configured to detect, from image information detected by the imaging device, an object and an occurrence of an occlusion where the object shields a distant viewing angle. The correction device is configured to correct position information of the object detected by the radar device when the imaging occlusion occurrence detection device detects the occurrence of the occlusion.