3 results about "Fish trap" patented technology

This utility model discloses a fish trap, including a drive structure, a float, and a folding fish cage. One side of the float is connected to the fish cage via a trapping component, which is connected to the drive structure via a combined transmission component. The trapping component includes two support blocks fixedly connected to the top surface of the float and the top surface of the fish cage, a corrugated telescopic tube A inserted through the inner wall of the two support blocks, and a corrugated telescopic tube B fixedly connected to one side of the fish cage at one end. The diameter of the corrugated telescopic tube B is greater than the diameter of the corrugated telescopic tube A. This utility model utilizes the sound of flowing water output from the corrugated telescopic tube B inserted through the side of the fish cage and from the corrugated telescopic tube A above the fish cage. Based on the fish's tendency to move in an oxygen-food-safe environment, it attracts fish into the fish cage, achieving the effect of attracting and catching a large number of fish. The barbel-shaped fish and shrimp inlet prevents fish from escaping after entering the fish cage.

This invention concerns an intelligent system for fishing selectivity and catch optimization of coastal fishermen designed to improve fishing efficiency in an environmentally friendly manner. This system consists of an environmentally friendly fish trap equipped with an underwater camera, aquatic environmental sensors, an underwater lighting module, an edge computing-based microcomputer unit, a communication module, and a power management module. Fish images and environmental data are automatically processed using the EcoTrapNet-DNN algorithm, which is a multi-task deep neural network based on underwater acquisition parameters configured to perform image quality validation, image quality improvement, fish detection and segmentation, size estimation based on geometry calibration, classification of fish types and sizes, and determination of catch selectivity scores.Based on the analysis, the system provides recommendations for fishing selectivity or, in certain embodiments, controls the selective mechanism in the fish trap so that target fish are retained, while non-target or substandard fish are released. This system can reduce bycatch, improve the quality and value of the catch, and support sustainable fishing practices for small- to medium-scale coastal fishers.

The utility model discloses a kind of paddy field fish shoal trapper, it is related to trapper technical field, including hollow guide column, its bottom fixedly connected with base;Fish shoal entrance is set in the bottom of the fish catching space;Limiting mechanism is used to lock the moving ring in working position;Moving ring is movably sleeved on the guide column, and can move up and down along its axial direction;Several elastic skeletons, two ends are connected between the base and the moving ring respectively;Fishing net is covered between the elastic skeleton, and with the base, moving ring is jointly enclosed into a telescopic cage-shaped fish catching space.The utility model is by using lantern type telescopic structure design, so that fish catching space has larger fish catching volume when unfolding, can quickly shrink when fish is collected, convenient storage, to significantly improve fish catching efficiency and facilitate the concentration of fish shoal to be taken out.