Collision Determination Device Using Shortest Arrival Time
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Solution Overview
Problem
Existing route setting devices do not adequately consider the traveling efficiency of host vehicles when determining collision avoidance, leading to increased processing loads and reduced realizability.
Innovation Solution
A collision determination device that calculates the shortest arrival time of other objects at potential host vehicle routes and determines collision possibility based on this time and passage time, reducing computational load while ensuring collision avoidance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If control is performed taking into consideration the traveling efficiency of the host vehicle in the route setting device of the related art, then the traveling efficiency is improved, but the processing load increases with an increase in the amount of computation
Solution Approach 1:
The patent segments the route evaluation process into two distinct phases: a first evaluation that considers only collision avoidance with simplified calculations, and a second evaluation that considers traveling efficiency but is applied only to routes that passed the first evaluation. This segmentation reduces the overall processing load by avoiding complex calculations for all possible routes while still achieving both collision avoidance and traveling efficiency optimization.
Solution Approach 2:
The patent implements partial action by applying the full traveling efficiency evaluation only partially - specifically, only to routes that have already been filtered by the collision avoidance evaluation. This partial application reduces computational burden while maintaining the benefits of efficiency optimization where it matters most.
2Reliability
If a locus of an object is generated and the degree of interference is calculated on the basis of the route of the object predicted by the locus in the route setting device of the related art, then collision avoidance is achieved, but the processing load increases
Solution Approach 1:
The patent extracts and isolates the collision avoidance evaluation as a separate, independent process from the traveling efficiency evaluation. By taking out the collision avoidance function and implementing it as a preliminary filter using simplified calculations (without generating full loci or predicting complete routes), the system achieves reliable collision avoidance while significantly reducing computational load compared to integrated approaches.
Solution Approach 2:
The patent performs preliminary collision avoidance evaluation before conducting the traveling efficiency evaluation. This preliminary action filters out unsafe routes in advance, so that subsequent detailed evaluations are performed only on routes that are already known to be collision-free, thereby reducing overall computational requirements.
Data Source
AI summary
A collision determination device determines the possibility of collision between a host vehicle and the other object on the basis of a shortest arrival time calculated by a shortest arrival time calculation unit and a passage time at each point of the host vehicle acquired by a vehicle route candidate acquisition unit. In this way, even if a locus to be taken by the other object is not generated, the shortest arrival time at which the other object can arrive at each point of the route candidate of the host vehicle with a predetermined first displacement is calculated, thereby determining the possibility of collision between the host vehicle and the other object. Therefore, it is possible to reduce a computational load for determining collision and to accurately determine collision between the host vehicle and the other object.