Pole-and-Line Fishing Device Dynamic Torque Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional pole-and-line fishing methods face issues with fishline severance during tuna catching, leading to unnatural bait motion and meat deterioration due to excessive stress, resulting in low catch rates and burnt meat.
Innovation Solution
A pole-and-line fishing device equipped with a rotary drum, electromagnetic clutch, encoder, and control unit that adjusts torque and rotation speed to adapt to tuna movements, preventing fishline severance and allowing controlled swimming, enabling the use of thinner lines for improved catch rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a thick fishline is used to prevent severance, then the strength of the fishline is improved, but the natural motion of the bait deteriorates and catch rate decreases
Solution Approach 1:
The patent employs a dynamic braking system that automatically adjusts the winding force based on the tuna's movement intensity. The braking force is proportional to the drum's rotational speed, allowing the system to adapt in real-time between strong resistance during wild swimming and gentle control during exhaustion, eliminating the need for thick static lines
Solution Approach 2:
The system changes the physical parameter of winding force dynamically during the fishing process. By varying the braking force according to drum speed, the fishline tension is automatically adjusted to match the tuna's activity level, maintaining line strength effectiveness while preserving natural bait motion characteristics
2Reliability
If a thick fishline is used to prevent severance, then the reliability of the fishing line is improved, but the bait motion becomes unnatural and tuna bite rate decreases
Solution Approach 1:
The dynamic braking system provides reliable fishline control without requiring increased line thickness. The electromagnetic brake engages proportionally to drum speed, ensuring the fishline remains secure during high-speed tuna swimming while allowing natural motion during lower-speed periods when tuna are more likely to bite
3Reliability
If the tuna is allowed to swim wildly, then the fishline may be severed, but the tuna meat quality deteriorates due to burning
Solution Approach 1:
The system uses feedback from drum rotational speed to automatically control braking force. When the tuna swims wildly causing high drum speeds, the brake applies strong counter-force to prevent line severance. When the tuna slows down or exhausts, the brake force reduces accordingly, preventing excessive stress and heat generation that would burn the meat
Solution Approach 2:
The proportional braking system dynamically adjusts resistance based on real-time tuna movement. This prevents the two extremes of wild swimming (line severance) and excessive restraint (meat burning) by continuously matching braking force to the tuna's actual swimming intensity
4Strength
If strong winding force is applied to prevent line severance, then the fishline strength is improved, but the tuna body temperature increases causing burnt meat
Solution Approach 1:
The electromagnetic brake provides dynamic winding force that is proportional to drum rotational speed rather than constant maximum force. This means strong winding force is only applied when the tuna is swimming at high speed, preventing line severance. When the tuna slows down, the winding force automatically reduces, preventing excessive heat generation and meat burning
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 device effectively prevents fishline severance, reduces meat deterioration, and enhances catch success by allowing controlled tuna movement, enabling the use of thinner lines and improving fishing efficiency.
Implementation Method 1
an electromagnetic clutch arranged between the rotary drum and the drive motor such that rotation of the drive motor is transmitted to the rotary drum
Implementation Method 2
an encoder for detecting direction and speed of rotation of the rotary drum
Data Source
AI summary
A pole-and-line fishing device includes a rotary drum, a drive motor, an electromagnetic clutch, an encoder for detecting direction and speed of rotation of the rotary drum, and a control unit for controlling the electromagnetic clutch. The drive motor can rotate the rotary drum in a forward winding direction until a load reaches a transmission torque, and when load exceeds the transmission torque, the drum can rotate in a reverse unwinding direction. In a reverse torque operation region, a winding torque is set to a preset Winding Force 2 Reference Rotation Speed relative to a Winding Force 1, and is changed based on a change of rotation speed of the drum. The ratio of winding torque increase/decrease is determined by a torque rising curve. The winding torque switches to Winding Force 3 to perform a constant torque operation when speed of the drum reaches Winding Force 3 Reference Rotation Speed.