Path Checking Device for Automated Vehicles
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Solution Overview
Problem
Automated-driving systems face challenges in maintaining a stable safety distance, particularly when surrounding vehicles exhibit irregular acceleration or deceleration, leading to unnecessary emergency controls such as stops.
Innovation Solution
A path checking device with a safety distance setting unit, a caution distance setting unit, and an emergency control unit that adjusts the vehicle's distance from obstacles and surrounding vehicles based on calculated safety and caution distances, preventing unnecessary emergency stops by decelerating or steering to maintain a safe distance without invoking emergency stops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system maintains a strict minimum safety distance from surrounding vehicles, then collision avoidance is ensured, but unnecessary emergency stops occur when surrounding vehicles exhibit irregular acceleration or deceleration
Solution Approach 1:
The system dynamically adjusts the safety distance based on the behavior state of surrounding vehicles. When irregular acceleration or deceleration is detected, the system switches from strict safety distance maintenance to a more flexible caution distance approach, allowing the subject vehicle to continue traveling smoothly without unnecessary emergency stops while still ensuring collision avoidance through continuous monitoring and adaptive control.
2Reliability
If the system executes emergency control when safety distance is violated, then immediate collision prevention is achieved, but unnecessary emergency stops occur due to irregular behavior of surrounding vehicles
Solution Approach 1:
The system performs preliminary identification of the surrounding vehicle's behavior state before executing emergency control. By detecting whether the surrounding vehicle is exhibiting regular or irregular acceleration/deceleration patterns in advance, the system can differentiate between genuine safety threats and normal traffic variations, triggering emergency control only when truly necessary and maintaining travel smoothness during routine operations.
Solution Approach 2:
The system continuously monitors the acceleration and deceleration patterns of surrounding vehicles and uses this feedback to adjust its control strategy. When irregular behavior is detected, the system adapts by maintaining a cautious distance without triggering emergency stops, while still ensuring collision prevention through real-time distance monitoring and adaptive control adjustments.
3Device complexity
If the system maintains a fixed safety distance, then simple control logic is used, but the system cannot adapt to irregular acceleration or deceleration of surrounding vehicles
Solution Approach 1:
The system implements dynamic safety distance adjustment based on the detected behavior state of surrounding vehicles. The control logic automatically switches between fixed distance mode (for regular behavior) and adaptive distance mode (for irregular behavior), maintaining simplicity in normal operations while providing adaptability when needed through automated state recognition and mode switching.
Data Source
AI summary
A path checking device for a subject vehicle includes: a safety distance setting unit that sets a minimum safety distance for a surrounding vehicle in order for the subject vehicle to avoid closely approaching the obstacle; an emergency control unit that executes emergency control for the subject vehicle when a distance between the subject vehicle and the surrounding vehicle is less than the safety distance; and a caution distance setting unit that sets a caution distance for the subject vehicle to the surrounding vehicle. The emergency control unit is further configured to: determine whether the subject vehicle is traveling with the caution distance; and control the travel control unit to increase a distance from the subject vehicle to the surrounding vehicle to exceed the caution distance when the distance from the subject vehicle to the surrounding vehicle is less than the caution distance.