Vehicle Usable Distance Prediction for Moving-Object ADAS
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Solution Overview
Problem
Advanced driver assistance systems (ADAS) are not effectively activated in situations with moving objects due to the failure to consider their velocity, leading to inadequate safety distances and unnecessary deactivation of safety features.
Innovation Solution
A method and system that determine a usable distance by extending the current obstacle-free distance with an estimated extension distance based on the moving object's velocity, considering emergency braking and steering scenarios to ensure safety without sacrificing system availability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the obstacle free distance is determined considering only stationary objects, then the detection system is simple and fast, but the safety distance is insufficient when moving objects are present
Solution Approach 1:
The system performs preliminary classification of detected objects as moving or stationary before calculating safety distance. This preliminary action allows the system to apply different calculation methods appropriately, improving reliability without requiring complete system redesign
Solution Approach 2:
The safety distance calculation is made dynamic by adapting it to the motion state of objects. When a moving object is detected, the system dynamically adjusts the safety distance based on velocity and predicted position, rather than using a fixed static calculation
2Reliability
If the assistance systems are deactivated when obstacle free distance is below predetermined limit, then safety is ensured for stationary objects, but system availability is reduced in dynamic situations
Solution Approach 1:
The system changes the evaluation parameter from static distance comparison to dynamic distance comparison that incorporates object velocity. This allows the assistance systems to remain available when the dynamic usable distance is sufficient, even if the static obstacle free distance appears insufficient
3Productivity
If the safety distance is increased to account for moving objects, then system availability improves, but the actual usable distance is underestimated
Solution Approach 1:
The system performs preliminary velocity measurement and position prediction before calculating the final usable distance. This preliminary action with moving objects allows for a more accurate determination of the actual usable distance by accounting for the object's motion trajectory
Data Source
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AI summary
A method for determining a usable distance between a host vehicle and a moving object is provided. According to the method, a current obstacle free distance is detected in front of the host vehicle, wherein the current obstacle free distance is limited by a current position of the moving object, and a current velocity of the moving object is determined. An extension distance is estimated based on the current velocity of the moving object, and the usable distance is determined based on the current obstacle free distance and the extension distance.