Turning Collision Prediction Using Target Trajectory and TTC
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Solution Overview
Problem
Conventional vehicle collision determination apparatuses fail to accurately assess the risk of collision during turns due to neglecting the speed and trajectory of moving obstacles, leading to potential collisions being overlooked or inadequately addressed.
Innovation Solution
A vehicle collision determination apparatus that calculates the trajectory of both the vehicle and the moving obstacle, determines the position of collision, and computes the time to collision based on the obstacle's speed, enabling accurate risk assessment and timely collision avoidance measures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the conventional apparatus determines collision risk based only on vehicle turning trajectory and obstacle position, then the determination process is simple, but the collision risk assessment is inaccurate because it neglects obstacle speed and trajectory
Solution Approach 1:
The system pre-calculates the movement trajectory of the moving object before determining collision risk. By obtaining the moving object's speed and direction in advance and computing its trajectory beforehand, the system integrates this information into the collision determination process, improving accuracy without significantly increasing real-time computational complexity
Solution Approach 2:
The system transitions from a static collision determination method (only considering vehicle trajectory and obstacle position) to a dynamic method that incorporates the moving object's speed, direction, and predicted trajectory. This dynamic approach continuously updates the collision risk assessment based on the moving object's current motion state
2Reliability
If the apparatus calculates time to collision based on obstacle speed and trajectory, then the collision risk determination becomes more accurate, but the computational complexity increases
Solution Approach 1:
The system performs preliminary calculations of the moving object's trajectory and potential collision points before final collision determination. By pre-computing where the moving object will be at future time points based on its current speed and direction, the system reduces the complexity of the final time-to-collision calculation
Solution Approach 2:
The system creates a virtual model or copy of the moving object's trajectory and uses this copied path for collision analysis. Instead of directly solving complex real-time collision equations, the system simulates the moving object's path and determines collision risk based on the intersection of this copied trajectory with the vehicle's turning path
Data Source
AI summary
In a vehicle collision determination apparatus, a position calculation unit calculates a trajectory of a target that is a movement trajectory of the target, and calculates an entrainment trajectory of the vehicle that is a movement trajectory of the vehicle during a turn, and calculate a position of collision where a collision is likely to occur between the vehicle and the target based on the trajectory of the target and the entrainment trajectory of the vehicle. A time calculation unit calculates a time to collision (TTC) that is a time it takes for the target to reach the position of collision. In response to the time to collision being equal to or less than a predefined determination threshold, a risk determination unit determines that there is a risk of collision between the vehicle and the target.