Navigation Aid Device Multi-Point Calculation for Collision Risk
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current navigation aid systems face challenges in accurately determining and displaying the spatial relationship between a ship and obstacle objects, particularly at long distances, and in crowded routes, where many obstacle candidates make it difficult for operators to quickly and accurately identify true obstacles and determine necessary course and speed changes.
Innovation Solution
A navigation aid method and device that sets multiple calculation points in time to calculate and display the positions of a ship and obstacles, allowing for accurate determination of collision preventive actions by acquiring and updating information at each calculation point, enabling precise display of spatial relationships and alert conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single calculation point in time is used for trial calculation, then the calculation process is simple, but the accuracy of spatial relationship determination deteriorates due to information lag
Solution Approach 1:
The trial calculation process is segmented into multiple calculation points in time (first calculation point, second calculation point, etc.), where each point performs calculations using information acquired at that specific time. This segmentation allows the system to capture temporal changes in spatial relationships while maintaining manageable calculation complexity at each segment.
Solution Approach 2:
The system performs preliminary calculations at multiple time points before final determination. By calculating spatial relationships at the first calculation point, then performing additional calculations at the second calculation point using updated information, the system prepares accurate data in advance for collision risk assessment.
2Reliability
If information is acquired at a single time point, then the information processing is simple, but the accuracy of collision risk assessment deteriorates due to outdated information
Solution Approach 1:
The system implements periodic information acquisition at multiple calculation points in time. Information is acquired at the first calculation point, then again at the second calculation point, creating a periodic update cycle that ensures current information is used for assessment while maintaining a systematic and manageable acquisition process.
Solution Approach 2:
The system uses feedback from the first calculation point results to inform the second calculation point. The spatial relationship determined at the first point feeds into the subsequent calculation, allowing the system to refine its assessment based on updated information while maintaining logical continuity.
3Loss of information
If multiple obstacle candidates are displayed on crowded routes, then comprehensive navigation information is provided, but the operator burden increases making it difficult to quickly identify true obstacles
Solution Approach 1:
The system extracts and highlights critical information from the multiple obstacle candidates by performing separate trial calculations for each candidate at multiple time points. This extraction process identifies which obstacles pose genuine collision risks versus those that are distant or moving away, allowing the system to present refined, actionable information that reduces operator burden while maintaining completeness.
Solution Approach 2:
The system applies different quality levels of analysis to different obstacle candidates based on their local characteristics. Obstacles that show potential collision risk receive more detailed multi-point calculation analysis, while clearly safe obstacles receive less intensive processing, optimizing the balance between information completeness and operational ease.
Data Source
AI summary
This disclosure provides a navigation aid device that includes a calculation time setting module for setting two or more calculation points of time for calculating trial information, a ship-concerned information acquisition module for acquiring ship-concerned information including a position of a ship concerned at every predetermined ship-concerned information acquisition time, a ship-concerned trial information calculating module for calculating ship-concerned trial information including the position of the ship concerned at each calculation point of time based on the ship-concerned information acquired at the newest information acquisition time with respect to the calculation point of time.