Rear Vehicle Object Detection With Delayed Alert Judgment
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Solution Overview
Problem
Conventional vehicle object detection systems struggle to accurately distinguish between alert and non-alert objects in the rear traffic area, leading to unnecessary warnings due to inaccurate position detection and tracking by radar sensors, particularly when vehicles enter the detection area from the side opposite to the sensor's location, causing false alarms.
Innovation Solution
Implement a delay time mechanism in the vehicle object detection system to suppress warnings for a specified period when a target object enters the detection area from the side opposite to the sensor's location, ensuring accurate judgment of alert objects by delaying the warning decision until a set time has elapsed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radar sensors are used to detect target vehicles in the rear detection area, then the system can identify potential safety threats, but the system generates false alarms when vehicles momentarily enter the detection area from adjacent lanes
Solution Approach 1:
The system performs preliminary tracking of detected target objects over a predetermined time period before generating alerts. This preliminary action allows the system to distinguish between vehicles that will actually enter the subject vehicle's lane versus those that are merely passing through adjacent lanes, thereby reducing false warnings while maintaining reliable detection of genuine threats.
2Speed
If the system immediately generates warnings when target objects are detected in the detection area, then safety response time is reduced, but unnecessary alarms occur due to inaccurate position detection at field of view edges
Solution Approach 1:
The system implements preliminary tracking and position verification over a predetermined time period before issuing warnings. This allows the system to confirm that target objects are genuinely entering the subject vehicle's lane rather than merely appearing at the edge of the field of view, thereby maintaining fast response times while eliminating false alarms caused by position detection inaccuracies.
3Area of stationary object
If the detection system monitors the entire detection area continuously, then all potential threats are captured, but the system cannot distinguish between vehicles on the own lane and vehicles on adjacent lanes
Solution Approach 1:
The system segments the detection area into the subject vehicle's own lane and adjacent lanes, and applies different alert generation rules to each segment. Vehicles detected in the own lane trigger alerts after the predetermined time period, while vehicles detected only in adjacent lanes do not trigger alerts even if they momentarily enter the detection area. This segmentation preserves comprehensive detection coverage while maintaining accurate lane position information for alert decision-making.
Data Source
AI summary
A vehicle object detection system configured to generate a judgement on whether a target object which has been detected to enter the detection area is an alert object, and to output the judgement to a warning which is configured to output a warning to a driver of the subject vehicle that a target object is present in the detection area behind the subject vehicle based on the judgement indicating that the target object is an alert object, wherein the system is configured to delay generating the judgment until a specified period of time has elapsed from a point in time when the target object is detected to enter a detectable area included in a field of view of a sensor, wherein the detectable area overlaps with only a part of the detection area.