Blind-Spot Collision Warning Using Lateral TTC Prediction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing collision warning systems fail to provide warnings when a moving target in a blind spot attempts to cross the travel path of an ego-vehicle, which can lead to potential collisions.
Innovation Solution
A method for collision warning that determines a warning zone at the lateral side of the ego-vehicle, identifies a movable target within this zone, calculates the heading angle and predicts a crossing point, and provides a warning if certain conditions are met, including speed, heading angle, and lateral time to collision thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional collision warning systems are used, then they can detect targets in front of the ego-vehicle, but they fail to detect moving targets in blind spots that attempt to cross the travel path
Solution Approach 1:
The patent extends collision detection from the traditional forward-facing direction into the lateral dimension by defining a warning zone at the lateral side of the ego-vehicle. This dimensional expansion allows the system to detect moving targets in blind spots that were previously undetectable, thereby improving both reliability and adaptability without compromising each other
2Adaptability or versatility
If the warning zone is extended to cover blind spots, then detection coverage is improved, but false warnings may increase due to more targets being detected
Solution Approach 1:
The patent introduces multiple parameter thresholds including speed threshold, heading angle threshold, and lateral time to collision threshold. These parameter changes enable the system to distinguish between genuine collision risks and benign detected targets, maintaining warning accuracy while expanding detection coverage to blind spots
3Reliability
If multiple detection parameters and thresholds are implemented, then warning accuracy is improved, but system complexity increases
Solution Approach 1:
The patent pre-defines threshold values for speed, heading angle, and lateral time to collision before actual operation. This preliminary action allows the complex multi-parameter evaluation system to function efficiently by comparing detected parameters against predetermined thresholds, reducing real-time computational complexity while maintaining high warning accuracy
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A method (300) for collision warning of an ego-vehicle (1), wherein method (300) comprises the following steps: determine (S1) a speed of an ego-vehicle (1), determine (S2) a warning zone (3) of an ego-vehicle (1), wherein the warning zone is preferably provided at a lateral side of the ego-vehicle, determine (S3) a movable target (5) located at least partially within the warning zone (3) of the ego-vehicle (1), determine (S4) a heading angle (7) between an ego-vehicle travel direction (15) and a movable target travel direction (17), predict (S5) a crossing point (9) of the movable target (5) and the ego-vehicle (1), determine (S6) a lateral time to collision, TTC, of the movable target (5) and the ego-vehicle (1), wherein a lateral direction (L) is a direction orthogonal to a travel direction (T) of the ego-vehicle (1), and provide (S7) a collision warning if the following conditions are met: a determined vehicle speed is higher than a vehicle speed threshold value, a determined heading angle (7) is within a heading angle threshold value range, a predicted crossing point (9) hits the ego-vehicle (1), and a determined lateral TTC is less than a lateral TTC threshold value.