Collision Risk Calculation for Vessel Navigation Control
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Solution Overview
Problem
Existing collision risk calculation methods for vessels struggle to quantify collision risks represented as geometrical regions, making it difficult for navigation control to assess the degree of risk effectively.
Innovation Solution
A collision risk calculation program and device that converts region-type risk values into numerical values, allowing for the weighting of both numerical and region-type risk values to provide a total risk value, enabling quantitative assessment of collision risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If collision risk is represented as geometrical regions for intuitive recognition, then ease of operation is improved, but measurement precision deteriorates
Solution Approach 1:
The patent combines geometrical region representation with numerical risk values by calculating the ratio of the dangerous region area to the total sea area. This merging allows the system to maintain the intuitive visual representation of collision risk while adding quantitative measurement capability, thus resolving the contradiction between ease of operation and measurement precision.
Solution Approach 2:
The patent transforms the geometrical region concept into a quantifiable parameter by calculating the area ratio of the dangerous region to the total sea area. This parameter change converts the qualitative geometrical representation into a quantitative metric that can be precisely measured and compared, while still being derived from the original geometrical region concept.
2Measurement precision
If only numerical risk values are used for quantitative assessment, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The patent merges numerical risk values with geometrical region visualization by calculating the dangerous region area ratio and presenting it alongside or integrated with the visual representation. This combination allows navigation control to benefit from both the precision of numerical data and the intuitiveness of graphical display, resolving the contradiction between measurement precision and ease of operation.
3Ease of operation
If collision risk is represented as geometrical regions, then ease of operation is improved, but loss of information deteriorates
Solution Approach 1:
The patent combines geometrical region display with numerical risk information by calculating and presenting the area ratio of dangerous regions to total sea area. This merging ensures that neither the visual representation nor the quantitative data is lost, but rather both are preserved and presented together, resolving the contradiction between ease of operation and loss of information.
Solution Approach 2:
The patent uses the area ratio calculation as an intermediary that bridges the geometrical region representation and quantitative risk assessment. This intermediary transforms the visual geometrical information into a numerical form without losing the original geometrical context, thus preventing information loss while maintaining ease of operation.
Data Source
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AI summary
A collision risk calculation program configured to cause a processor to perform processing, the processing includes: executing acquisition processing that includes acquiring travel information regarding a position and velocity of each of a first vessel and a second vessel; executing region calculation processing that includes calculating a region having a possibility of future collision between the first vessel and the second vessel from the travel information of each of the first vessel and the second vessel; and executing first risk calculation processing that includes calculating a first risk value based on a maneuvering amount used by the first vessel or the second vessel in order to avoid the region.