Oncoming Vehicle Risk Mapping for Preliminary Collision Avoidance
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Solution Overview
Problem
Existing vehicle driving assist devices struggle to ensure sufficient safety when an oncoming vehicle suddenly enters the traveling lane, as they may not be able to realize effective collision avoidance control in such scenarios.
Innovation Solution
A vehicle driving assist device equipped with a traveling environment recognizer, obstacle recognizer, emergency collision avoidance controller, oncoming moving body recognizer, risk determination region setting unit, risk degree calculator, and preliminary collision avoidance controller, which recognizes oncoming moving bodies as obstacles based on calculated risk degrees and performs preliminary collision avoidance control before emergency collision avoidance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle relies only on emergency collision avoidance control for oncoming vehicles, then the system complexity is reduced, but the safety reliability is insufficient when oncoming vehicles suddenly enter the traveling lane
Solution Approach 1:
The system performs preliminary collision avoidance control in advance when an oncoming vehicle is detected in the opposite lane, preparing the vehicle state before emergency collision is imminent. This includes preliminary braking and steering adjustments to optimize collision avoidance readiness, so that when emergency collision avoidance is triggered, the vehicle can respond more effectively and reliably.
Solution Approach 2:
The system applies preliminary anti-action by pre-positioning the vehicle in a state that counteracts the potential harmful effect of oncoming vehicle collision. This involves提前 applying braking force and adjusting steering angle to create a more favorable initial state for emergency avoidance, reducing the severity of potential collision.
2Reliability
If the vehicle performs preliminary collision avoidance control in response to oncoming moving bodies, then the safety reliability is improved, but the device complexity increases due to additional recognition and control systems
Solution Approach 1:
The obstacle recognizer is designed to universally recognize both obstacles in the traveling lane and oncoming moving bodies in the opposite lane using the same sensor system and recognition algorithms. This multi-functional approach allows the system to handle different scenarios with a single unified component, improving reliability without proportionally increasing device complexity.
Solution Approach 2:
The system merges the emergency collision avoidance controller and preliminary collision avoidance controller into an integrated control system that shares common sensors, processors, and actuators. By combining these functions, the system achieves improved safety reliability through coordinated control while avoiding the complexity of completely separate independent systems.
3Measurement precision
If the vehicle uses a risk determination region with varying risk degrees, then the measurement precision of collision risk is improved, but the calculation complexity increases
Solution Approach 1:
The risk determination region is divided into multiple zones with different risk degrees (first risk degree for closer regions, second risk degree for farther regions). This local differentiation allows the system to allocate computational resources efficiently, performing more detailed calculations only where necessary, thereby improving measurement precision while managing calculation complexity through spatial prioritization.
Data Source
AI summary
A vehicle driving assist device comprises: an oncoming moving body recognizer configured to recognize an oncoming moving body; a risk determination region setting unit configured to set a risk determination region for calculating a risk degree that decreases as a distance outward from a center of the oncoming moving body in a width direction of the oncoming moving body increases; a risk degree calculator configured to calculate the risk degree for the oncoming moving body in accordance with an overlap state between the target traveling path of the vehicle and the risk determination region; and a preliminary collision avoidance controller configured to recognize the oncoming moving body as the obstacle in accordance with the risk degree, and perform preliminary collision avoidance control in response to the oncoming moving body recognized as the obstacle prior to the emergency collision avoidance control.