Marine Vessel Map Cell Risk Assessment
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Solution Overview
Problem
Existing methods for providing maps for unmanned marine vessels lack nuanced obstacle classification, limiting maneuverability by treating all obstacles equally, which can lead to increased risks of collisions in complex environments like harbors and open waters.
Innovation Solution
A method that divides map data into cells, uses sensor measurements to assess risk, and assigns risk parameters to each cell, allowing for detailed classification and safe navigation by determining whether specific areas are high or low risk, enabling the marine vessel to operate safely amidst dynamic and stationary obstacles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If binary obstacle classification is used, then device complexity is reduced, but measurement precision of obstacle risk is deteriorated
Solution Approach 1:
The patent segments the map data into multiple cells and further divides obstacles into different types (dynamic, stationary, navigable, non-navigable) with varying risk levels. Instead of treating all obstacles uniformly, each cell can have customized risk parameters based on the specific obstacle types present, enabling nuanced risk assessment while maintaining manageable system complexity through modular cell-based processing
Solution Approach 2:
The patent applies local quality by allowing different risk parameters to be assigned to different cells based on local obstacle characteristics. Each cell can have customized risk levels and obstacle type classifications relevant to its specific environment, rather than applying a uniform classification system across the entire map. This enables precise local risk assessment while the overall system remains structured and manageable
2Reliability
If detailed risk assessment per cell is implemented, then navigation safety is improved, but device complexity increases
Solution Approach 1:
The patent divides the navigation environment into discrete cells, each with its own risk parameters and obstacle classifications. This segmentation allows detailed risk assessment to be performed independently for each cell, improving overall navigation safety through comprehensive local analysis while keeping the computational complexity manageable by processing cells in a modular, systematic manner
Solution Approach 2:
The patent implements dynamic risk assessment where risk parameters for each cell can be updated in real-time based on sensor measurements and changing obstacle positions. The system dynamically adjusts risk levels and obstacle classifications as the marine vessel moves through different cells, enabling adaptive navigation safety without requiring a static, overly complex predetermined system
3Ease of operation
If binary obstacle classification is used, then ease of operation is improved, but maneuverability of the marine vessel is reduced
Solution Approach 1:
The patent segments obstacles into multiple categories (dynamic, stationary, navigable, non-navigable) with different risk levels, providing detailed information that enhances vessel maneuverability. The segmented cell-based approach organizes this detailed information in a structured manner that maintains ease of operation, allowing the vessel to adapt its navigation strategy based on specific obstacle types in each cell while keeping the system user-friendly and manageable
Data Source
AI summary
A method of providing an electronic map for operating a marine vessel (37), the method comprising the steps of: providing (43) map data, dividing (45) the map data into a first cell and a second cell (39, 39a, 39b) defining a fixed geographical area of the map data, receiving (47) a first measurement from a first sensor of the marine vessel, where the first measurement comprises a first sensor parameter representing a measurement relating to the geographical area of the first cell and/or the second cell, determining (51) a risk assessment of the first sensor parameter, assigning (53) a first risk parameter to the first cell and/or the second cell, operating (55) the marine vessel based on the first risk parameter of the first cell and/or the second cell.


