Inter-Layer Tidal Current Mapping for Fishing Ground Search
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Solution Overview
Problem
Existing tidal current measuring devices can only measure currents directly below a ship, requiring time-consuming on-site verification to find fishing grounds where currents resemble each other between different water layers.
Innovation Solution
A sea condition information providing device that acquires and calculates inter-layer tidal current differences using data from multiple layers, displaying these differences on a map to facilitate easy identification of regions where tidal currents are similar.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a ship actually goes to the place to check tidal currents, then accurate measurement of tidal currents at the fishing ground can be obtained, but it takes time to search for a fishing ground where tidal currents resemble each other between layers
Solution Approach 1:
The patent applies preliminary action by pre-acquiring tidal current data from multiple layers before the ship reaches the fishing ground. The system obtains first layer tidal current data and second layer tidal current data in advance, calculates inter-layer tidal current differences beforehand, and prepares the inter-layer tidal current difference distribution map prior to arrival, enabling immediate identification of suitable fishing grounds without time-consuming on-site measurements.
Solution Approach 2:
The patent uses copying by creating a visual representation (inter-layer tidal current difference distribution map) that replicates the tidal current conditions across different layers. This map copy allows operators to identify regions where tidal currents resemble each other between layers without physically being present at each location, thus reducing search time while maintaining measurement accuracy.
2Device complexity
If only local tidal current directly below a ship is measured, then the measuring device complexity is reduced, but the ability to identify regions where tidal currents resemble each other between layers is limited
Solution Approach 1:
The patent applies universality by making the data processing system multi-functional. The same computing device that handles basic navigation data also performs inter-layer tidal current difference calculations and generates distribution maps. This allows a single device to serve multiple purposes: navigation, tidal current analysis, and fishing ground identification, thereby enhancing versatility without proportionally increasing complexity.
Solution Approach 2:
The patent uses an intermediary approach by introducing a display device that visualizes the inter-layer tidal current difference distribution. This intermediary visualization layer translates complex multi-layer tidal current data into an interpretable map format, enabling operators to identify suitable fishing grounds without directly analyzing raw data from multiple sensors, thus maintaining simplicity while improving capability.
Data Source
AI summary
A first layer tidal current data acquirer acquires first layer tidal current data that represent a first layer vector quantity representing a direction and a speed of a tidal current in a first layer. A second layer tidal current data acquirer acquires second layer tidal current data that represent a second layer vector quantity representing a direction and a speed of a tidal current in a second layer. An inter-layer tidal current difference calculator calculates inter-layer tidal current difference data that represent an in-plane distribution of a difference vector quantity being a difference between the first layer vector quantity and the second layer vector quantity. A display controller performs inter-layer tidal current difference display control for displaying, over a map, an inter-layer tidal current difference distribution map that visualizes the in-plane distribution of the difference vector quantity represented by the inter-layer tidal current difference data.