Vehicle Intersection Collision Warning via Turning Radius Estimation
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Solution Overview
Problem
Existing vehicle collision avoidance systems do not effectively warn drivers of potential collisions when turning at intersections, as they lack the capability to estimate the risk of collision with counter vehicles and provide timely warnings.
Innovation Solution
A vehicle system equipped with a speed detector, sensor, and controller that calculates the turning radius and estimates the time to collision and collision avoidance time based on driving speed, yaw rate, and relative distance, transmitting a warning signal when the cross time falls within a specific range indicating a risk of collision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle enters the intersection without advance warning, then the driver maintains full control and responsiveness, but the risk of collision with counter vehicles increases due to lack of collision risk assessment
Solution Approach 1:
The system performs preliminary collision risk assessment by calculating time to collision and cross time before the vehicle actually enters the intersection. The controller estimates whether a collision will occur based on current trajectory and counter vehicle positions, providing advance warning to the driver before the critical moment arrives.
Solution Approach 2:
The controller acts as an intermediary between the driver and the collision risk, providing information about potential collisions without directly controlling the vehicle. The system mediates by presenting collision risk data to the driver, enabling informed decision-making while preserving driver autonomy.
2Reliability
If the system provides continuous collision warnings, then the driver receives maximum safety information, but false alarms may occur reducing driver trust and system effectiveness
Solution Approach 1:
The system changes the parameter of warning activation from continuous to conditional, based on calculated collision risk parameters. Warnings are only activated when the estimated time to collision falls within a specific range indicating actual danger, rather than providing continuous alerts regardless of situation.
Solution Approach 2:
The system provides feedback to the driver only when collision risk parameters indicate actual danger. The controller monitors the relationship between cross time and estimated time to collision, providing warning signals selectively when the parameters indicate a genuine collision threat, thereby avoiding false alarms.
3Object-affected harmful factors
If the vehicle turns with a larger turning radius, then the vehicle has more space to avoid counter vehicles, but the vehicle takes longer to complete the turn and may delay traffic flow
Solution Approach 1:
The system performs preliminary assessment of collision risk based on the calculated turning radius and counter vehicle positions. The controller estimates time to collision before the turn is completed, allowing the driver to adjust timing or trajectory in advance rather than reacting after the turn has begun.
Solution Approach 2:
The driver uses the collision risk information provided by the system to self-adjust the turning behavior. Rather than the system automatically controlling the turn, the driver maintains control while using the warning information to make informed decisions about turning speed and trajectory.
Data Source
AI summary
A vehicle turning in an intersection includes a speed detector configured to detect a driving speed of the vehicle; a sensor configured to determine a cross time between the vehicle and a target vehicle driving in the intersection, and a controller configured to calculate a turning radius of the vehicle in the intersection, based on a minimum turning radius of the intersection, configured to estimate a time to collision between the vehicle turning in the intersection and the target vehicle and a time to collision avoidance allowing the vehicle to pass cross the target vehicle without colliding with the target vehicle, based on at least one of the driving speed of the vehicle and the calculated turning radius, and configured to transmit a warning signal by estimating that the vehicle collides with the target vehicle when the determined cross time is equal to or more than the estimated time to collision and equal to or less than the estimated time to collision avoidance.