Rear Vehicle Detection Logic for Adjacent-Lane False Alarm Suppression
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Solution Overview
Problem
Conventional Advanced Driver Assistance Systems (ADAS) often generate unnecessary alarm warnings when a target vehicle enters the subject vehicle's lane from an adjacent lane, as they fail to differentiate between approaching and receding vehicles based on distance and velocity changes over time.
Innovation Solution
A vehicle object detection system that delays judgment on alerting the driver until a specified time has elapsed since the target vehicle entered the detection area from an adjacent lane, considering changes in distance and velocity in the longitudinal and lateral directions, to suppress warnings when the target vehicle is moving away.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system immediately generates an alarm when a target vehicle enters the detection area, then the safety response time is reduced, but unnecessary alarm warnings increase when the target vehicle is moving away
Solution Approach 1:
The system performs preliminary assessment by monitoring distance changes and velocity parameters during a specified time period before generating an alarm. This preliminary action allows the system to determine whether the target vehicle is approaching or receding, thereby avoiding unnecessary alarms while maintaining rapid response capability for genuine threats.
Solution Approach 2:
The system dynamically adjusts the alarm generation timing based on real-time distance change trends and velocity parameters. Instead of a fixed immediate response or fixed delay, the system adapts the alarm timing according to the target vehicle's motion state, generating alarms only when the distance is determined to be decreasing, thus resolving the contradiction between rapid response and alarm accuracy.
2Reliability
If the system monitors distance changes over a specified period, then unnecessary alarms are reduced, but the system complexity increases
Solution Approach 1:
The system uses parameter changes (distance, velocity, time duration) as the basis for judgment logic. By monitoring whether distance changes exceed a threshold during a specified time period and whether velocity parameters indicate approaching motion, the system achieves reliable alarm filtering through quantitative parameter assessment rather than complex qualitative analysis.
Solution Approach 2:
The system continuously monitors distance and velocity parameters and uses this feedback information to determine alarm generation timing. The feedback loop compares current distance measurements with previous measurements over a specified time period, and uses velocity data to confirm approach motion, thereby reducing unnecessary alarms through systematic feedback-based 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 warn 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 judgement until a specified period of time has elapsed from a point in time when the target object entered the detection area from an adjacent area located lateral to the detection area and/or is configured to generate the judgement based on a change in distance between the target object and the subject vehicle during said specified period of time.