Rear Vehicle Detection Judgment to Suppress Lane-Change False Alerts
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Solution Overview
Problem
Conventional Advanced Driver Assistance Systems (ADAS) often generate unnecessary alarm warnings when a target vehicle enters the lane behind a subject vehicle from an adjacent lane, leading to driver distraction and potential safety issues due to the lack of differentiation between approaching and receding vehicles based on distance and velocity changes.
Innovation Solution
A vehicle object detection system that delays judgment on alerting the driver until a specified time has elapsed after a target vehicle enters the detection area from an adjacent lane, considering changes in distance and velocity, thereby suppressing alarms when the target vehicle is moving away and not posing an imminent threat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If alarm warning is immediately activated when a target vehicle enters the detection area, then driver safety is improved by early warning, but false alarms increase causing driver distraction
Solution Approach 1:
The system performs preliminary assessment by monitoring distance changes and velocity during a specified time period before generating the final alarm judgment. This preliminary action allows the system to distinguish between vehicles that will pose a threat and those that are merely passing by, thereby reducing false alarms while maintaining early warning capability for genuine threats.
Solution Approach 2:
The system continuously monitors the target vehicle's distance and velocity changes over time, using this feedback information to dynamically adjust the alarm decision. By evaluating whether the distance is decreasing or increasing during the monitoring period, the system provides feedback that confirms or cancels the alarm warning, effectively reducing false alarms caused by vehicles changing lanes away from the subject vehicle.
2Object-generated harmful factors
If judgment is delayed until specified time has elapsed, then false alarms are reduced, but response time to actual threats is increased
Solution Approach 1:
The system applies partial monitoring action by observing the target vehicle for a specified time period to gather sufficient data on distance and velocity changes. This partial observation period is calibrated to be just long enough to distinguish between approaching and receding vehicles, avoiding excessive delay while ensuring accurate judgment. The monitoring duration is optimized to balance early warning needs with false alarm reduction.
3Device complexity
If alarm is triggered based on immediate detection, then system simplicity is maintained, but measurement precision of threat assessment is reduced
Solution Approach 1:
The system maintains continuous monitoring of the target vehicle's position and velocity during the specified time period, ensuring that the threat assessment is based on a continuous stream of data rather than isolated measurements. This continuous observation enables accurate determination of whether the vehicle is approaching or receding, significantly improving measurement precision while adding only moderate complexity through straightforward temporal comparison of distance measurements.
Data Source
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AI summary
The invention relates to a vehicle object detection system for detecting a target object in a detection area located behind a subject vehicle, the vehicle object detection system comprising: judging means 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 warning means 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 judging means 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. Moreover, the invention relates to a corresponding computer-implemented method for detecting a target object in a detection area located behind a subject vehicle.