Vehicle Collision Avoidance Under Obstructed Target Detection
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Solution Overview
Problem
Existing collision avoidance systems may perform unnecessary and unexpected control operations, such as rapid braking, when a target vehicle is obstructed from view, potentially leading to unexpected control actions for the own vehicle and increased risk of rear-end collisions.
Innovation Solution
A collision avoidance apparatus equipped with a camera, radar, transceiver, and CPU, which calculates a risk index based on the obstruction of the target vehicle and surrounding conditions, adjusting braking force accordingly to mitigate unexpected control operations and rear-end collisions by applying heavy or light braking depending on the calculated risk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If collision avoidance control is performed based only on communication information when target vehicle is obstructed, then collision risk is reduced, but unexpected control operations and rear-end collisions increase
Solution Approach 1:
The patent introduces a camera as an intermediary verification device to check whether the target vehicle is actually present and visible. The camera image serves as a mediator between the communication information and the collision avoidance control decision, allowing the system to verify the authenticity of the target before executing avoidance maneuvers, thereby preventing unexpected control operations caused by false positives
Solution Approach 2:
The system implements feedback by continuously monitoring whether the target vehicle is recognized in camera images. This feedback mechanism allows the system to adjust its collision avoidance control based on actual visual confirmation, preventing control operations when the target is obstructed or not actually present, thus reducing harmful unexpected maneuvers
2Reliability
If rapid braking is applied to avoid collision with obstructed target, then collision risk is reduced, but rear-end collision risk increases
Solution Approach 1:
The camera acts as an intermediary verification tool before executing rapid braking. By checking whether the target vehicle is visible and confirmed in the camera image, the system avoids unnecessary rapid braking when the target is obstructed, thereby preventing rear-end collisions with following vehicles while still maintaining effective collision avoidance when the target is actually present
Solution Approach 2:
The system applies partial verification (camera image recognition) before full collision avoidance action (rapid braking). This partial check ensures that rapid braking is only applied when truly necessary, reducing excessive braking actions that could cause rear-end collisions while maintaining sufficient braking force when actual collision risk exists
Data Source
AI summary
In a collision avoidance apparatus for a vehicle, a collision avoidance controller is configured to calculate a movement trajectory of a moving object moving on a road crossing a road that the vehicle is traveling on from a succession of locations of the moving object, calculate a movement trajectory of the vehicle using a speed of the vehicle, determine whether the movement trajectory of the moving object is a trajectory of a moving object likely colliding with the vehicle, and in response to determining that the movement trajectory of the moving object is a trajectory of a moving object likely colliding with the vehicle and that the moving object fails to be recognized by a camera due to a view of the moving object being obstructed, calculate a risk index for determining a collision avoidance measure and employ the collision avoidance measure in dependence upon the risk index.