Rear Warning Sensor Fusion for False Alarm Suppression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional rear cross-traffic collision-avoidance systems (RCCA) often generate unnecessary warnings and braking due to sensor limitations, such as misrecognition of fixed obstacles and reflective materials, leading to driver confusion and reduced reliability.
Innovation Solution
A vehicle rear warning system that uses sensor fusion of radar and camera data to separate a danger zone and a safe zone, controlling warnings and braking only for moving objects in the danger zone, while maintaining existing logic for situations with fewer obstacles or reflective surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If radar sensor is used to detect objects in reverse mode, then collision detection capability is improved, but false recognition of fixed obstacles and reflective materials causes unnecessary warnings
Solution Approach 1:
The patent combines radar sensor data with camera sensor data to perform sensor fusion for object detection. The radar provides detection capability while the camera verifies whether detected objects are actual moving targets or false reflections, resolving the contradiction between detection sensitivity and warning reliability.
Solution Approach 2:
The camera acts as an intermediary verification tool that confirms radar detections. By using camera imagery as a mediator to validate radar-detected objects, the system distinguishes between real threats and false alarms from fixed obstacles or reflective surfaces.
2Reliability
If warning and braking control is triggered sensitively, then collision avoidance capability is improved, but driver confusion increases due to unnecessary warnings in safe zones
Solution Approach 1:
The patent divides the rear detection area into danger zones and safe zones based on sensor fusion analysis. By segmenting the monitoring space and applying different warning strategies to different zones, the system maintains high collision avoidance capability while reducing unnecessary warnings in safe areas, thereby improving driver comfort.
3Area of stationary object
If radar detection range is expanded to cover fixed obstacles, then detection coverage is improved, but ghost recognition from reflective materials increases
Solution Approach 1:
The patent converts the harmful reflective property that causes ghost recognition into a beneficial verification mechanism. By using the camera to detect and analyze reflective surfaces, the system identifies ghost recognition patterns and excludes them from warning triggers, turning the previously harmful reflection into a useful diagnostic feature.
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
Prevents unnecessary sensitive operations by accurately distinguishing between danger and safe zones, enhancing system reliability and safety by limiting warnings and braking to only necessary situations, thus optimizing performance and reducing false alarms.
Implementation Method 1
a radar sensor to recognize a relative position and relative speed of a moving object
Implementation Method 2
it may cause unnecessary warning and braking due to misrecognition (also called ghost recognition/phenomenon) due to a radar signal or light reflection
Data Source
AI summary
A vehicle rear warning system includes: a driving information detection portion that collects information measured from a radar and a camera sensor in a reverse mode of a vehicle; and a controller that separates a danger zone and a safe zone with reference to a fixed obstacle at a rear of the vehicle by performing fusion of the information measured from the radar and the camera in the reverse mode of the vehicle, and generates a collision event and controls warning and braking when a moving object approaching from the danger zone is detected, while limiting the warning and braking for a moving object existing in the safe zone.