Marine Vessel Drift Control With Split Water Resistance Bodies
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Solution Overview
Problem
Conventional drift fishing methods using marine vessels face issues with fishing line entanglement due to differential movement of the hull and fishing line caused by varying tidal currents and wind directions, which are not effectively managed by manual resistance members.
Innovation Solution
A control device for marine vessels featuring independently adjustable water resistance bodies on the left and right sides of the hull, controlled by a system that acquires wind and tidal current data to adjust resistance levels, ensuring the hull moves in sync with the tidal current, reducing differential movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a manual resistance member (sea anchor) is used to increase water resistance, then the hull can be more strongly affected by tidal current, but it becomes difficult to maneuver the hull to move with the fishing line
Solution Approach 1:
The resistance member is divided into a left resistance body and a right resistance body that can be independently controlled. This segmentation allows differential resistance application to achieve both stable drift fishing and maneuverability, resolving the contradiction between strong water resistance and ease of operation.
Solution Approach 2:
The resistance member transitions from a static manual sea anchor to a dynamic system with independently controllable left and right resistance bodies. The controller can adjust each resistance body's submersion depth and resistance magnitude in real-time based on wind speed and tidal current speed, enabling both stable positioning and maneuverability.
2Productivity
If the hull drifts freely with tidal current, then drift fishing can be performed, but wind effects cause the hull and fishing line to move differently resulting in entanglement
Solution Approach 1:
The system incorporates sensors to detect wind speed and tidal current speed, feeding this information back to the controller. The controller then adjusts the left and right resistance bodies to compensate for wind effects, maintaining alignment between the hull and fishing line to prevent entanglement while preserving drift fishing productivity.
Solution Approach 2:
The system dynamically changes the resistance parameters of the left and right resistance bodies based on real-time wind and current conditions. By adjusting submersion depth and resistance magnitude, the system compensates for wind effects and maintains optimal drift fishing conditions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system provides an easy and stable drift fishing environment by minimizing the impact of wind on hull movement, maintaining alignment with tidal currents, and correcting angular deviations and speed discrepancies between the hull and fishing line.
Implementation Method 1
a resistance member, such as a sea anchor, which receives water resistance is submerged in the water enabling the hull to be more strongly affected by the tidal current than by the wind
Data Source
AI summary
A control device for a marine vessel includes a hull, a pair of water resistance bodies, and a controller. The pair of water resistance bodies are provided on the hull, one on a left side and one on a right side of the hull, each independently movable between a first position in which a resistance received from water in a predetermined direction is adjustable to a first magnitude, and a second position in which a resistance is adjustable to zero or to a second magnitude smaller than the first magnitude. The controller is configured or programmed to acquire wind speed, acquire tidal current speed, and control is configured or programmed to control the pair of water resistance bodies based on the wind speed and the tidal current speed.