Collision Determination Device Adaptive Condition Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing collision prediction methods are inadequate for curved paths, leading to unnecessary operations of passenger protection devices as they fail to accurately assess collision possibilities when vehicle directions change, resulting in improper prediction times.
Innovation Solution
A collision determination device with a possibility determination section, traveling direction determination section, and condition changing section that adjusts collision determination conditions based on changing traveling directions and estimated trajectories, using radar detection and radius of curvature calculations to refine collision assessment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If collision prediction is based on moving direction vector after predetermined prediction time, then collision possibility can be judged, but unnecessary operations occur in curved paths due to changing traveling directions
Solution Approach 1:
The patent applies dynamics by making the collision determination conditions adaptive rather than fixed. The control device dynamically adjusts determination conditions based on detected traveling direction changes, allowing the system to respond to varying road conditions (curved paths vs. straight paths). This resolves the contradiction by enabling accurate collision prediction while suppressing false alarms in curved paths through condition-based adaptation.
Solution Approach 2:
The patent changes parameters by modifying collision determination thresholds and conditions based on detected traveling direction changes. When a traveling direction change is detected, the system adjusts the parameters used for collision possibility judgment, thereby maintaining prediction accuracy while reducing unnecessary safety device activations in curved path scenarios.
2Measurement precision
If prediction time is extended to improve collision assessment, then more accurate judgment is achieved, but traveling direction changes make the assessment improper
Solution Approach 1:
The patent applies preliminary action by detecting traveling direction changes before conducting collision possibility assessment. The control device first determines whether the vehicle is undergoing a traveling direction change, and only then proceeds with appropriate collision assessment using suitable determination conditions. This preliminary detection prevents improper assessments in curved paths while maintaining precision in straight path scenarios.
Solution Approach 2:
The system dynamically selects assessment methods based on detected traveling direction changes. When a direction change is detected, the system switches to assessment conditions suitable for curved paths; otherwise, it uses standard assessment methods. This dynamic adaptation resolves the contradiction between extended prediction time benefits and reliability concerns in curved paths.
Data Source
AI summary
A collision determination ECU includes: a possibility determination section for determining whether or not there is a possibility of a collision with a forward vehicle; a traveling direction determination section for determining whether or not changing of a traveling direction of at least one of an own-vehicle and the forward vehicle is in progress; and a condition changing section for changing a collision determination condition, which is a condition for a possibility estimation section to determine that there is a possibility of a collision, so as to be strict, when the traveling direction determination section determines that changing of a traveling direction is in progress. As a result, unnecessary operations of a passenger protection device and the like can be suppressed.