Intersection AEB Timing Control With Front-Vehicle Recognition
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Solution Overview
Problem
Existing vehicle drive assistance systems face challenges in efficiently avoiding contact between a vehicle and a crossing vehicle at intersections, particularly when the own vehicle is following a preceding vehicle, leading to unnecessary activation of autonomous emergency braking (AEB) controls and discomfort for the driver.
Innovation Solution
A vehicle drive assistance apparatus that includes a surrounding environment information acquiring unit, a crossing-vehicle recognition unit, a contact estimation unit, and a contact avoidance operation determination unit, which calculates the estimated timing of the own vehicle and the crossing vehicle entering the intersection and determines whether to execute a contact avoidance operation based on the timing difference, deactivating AEB if the preceding vehicle is recognized to enter the intersection before the own vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If AEB control is executed whenever the drive assistance apparatus determines the possibility of contact between the own vehicle and the crossing vehicle at an intersection, then contact avoidance capability is improved, but driver convenience deteriorates due to unnecessary braking operations
Solution Approach 1:
The system changes the parameter of AEB execution by introducing a timing comparison criterion. Instead of executing AEB whenever contact possibility is detected, the system now compares the estimated arrival time of the own vehicle at the intersection with the estimated arrival time of the crossing vehicle. AEB is only executed when the own vehicle's arrival time is earlier than the crossing vehicle's arrival time, thereby eliminating unnecessary braking operations while maintaining contact avoidance capability.
2Reliability
If the drive assistance apparatus executes AEB control upon detecting a crossing vehicle, then safety is improved, but false alarms increase causing driver discomfort
Solution Approach 1:
The system introduces a feedback mechanism by comparing timing information. The contact estimation unit estimates the arrival time of both the own vehicle and the crossing vehicle at the intersection. This timing feedback is then used by the contact avoidance operation determination unit to decide whether to execute AEB. By incorporating this timing feedback, the system can distinguish between genuine contact risks and false alarm scenarios, thereby reducing unnecessary AEB executions while maintaining safety.
Data Source
AI summary
A vehicle drive assistance apparatus includes a surrounding environment information acquiring unit, a crossing-vehicle recognition unit, a contact estimation unit, a contact avoidance operation determination unit, and a front-vehicle recognition unit. The crossing-vehicle recognition unit recognizes a crossing vehicle based on the surrounding environment information acquired by the surrounding environment information acquiring unit. The contact estimation unit estimates a possible contact between an own vehicle and the crossing vehicle at an intersection by comparing an intersection entering time of the own vehicle with an intersection entering time of the crossing vehicle. When a front vehicle entering the intersection prior to the own vehicle is recognized by the front-vehicle recognition unit, the contact avoidance operation determination unit calculates an intersection entering timing of the front vehicle, and determines that the contact avoidance operation is not to be executed if the estimated intersection entering timing is a predetermined value or less.