13 results about "Snagging" patented technology

The invention discloses a multi-unmanned ship collision avoidance formation control method based on a BLF under generalized noise. The method comprises the following steps: S1, constructing a communication topological graph of an unmanned ship cluster based on a graph theory, constructing a Laplacian matrix, and defining a communication connection mode of the unmanned ship cluster; s2, establishing a linear dynamic model of the unmanned ship in combination with generalized noise definition, and defining a BLF according to the linear dynamic model; based on the local formation tracking error of the unmanned surface vehicle and in combination with the BLF, defining a collision-free formation tracking control protocol; and S3, an integral multiplicative obstacle Lyapunov function is combined with a stochastic differential equation stability theory to verify whether the collision-free formation tracking control protocol can enable the formation tracking error to be stable according to probability noise-state. According to the method, the collision avoidance algorithm is designed based on the BLF, the generalized noise is analyzed by using the stochastic differential equation, and the anti-interference capability of the multi-unmanned-ship formation is realized while the two core technologies guarantee that the multi-unmanned-ship safe formation is free of collision.

According to the technical scheme, the quantitative feeding device is characterized in that the quantitative feeding device comprises a buoyancy frame, a plurality of buoyancy barrels are fixedly installed on the bottom face of the buoyancy frame, a material barrel is fixedly installed in the buoyancy frame, and the outer circle wall face of the material barrel is fixedly sleeved with a fixing ring; the throwing assembly is arranged on the outer circle wall face of the material barrel and used for throwing baits for deep-sea breeding, the throwing assembly comprises a butt joint table, the butt joint table is arranged on the outer circle wall face of the fixing ring, and through the linkage rotation design of the fixing table and the butt joint table, the vertical height difference between the fixing table and the butt joint table caused by water level fluctuation is automatically compensated; it is ensured that a key butt joint part clamping column and a groove are always kept aligned on a space track, rigid butt joint obstacles caused by water level fluctuation are avoided, a cam-spring mechanism is driven through movement of a recovery steel rope, and the clamping column generates high-frequency micro-amplitude vibration.

The invention discloses an anti-collision and anti-hanging device for a hook group and a using method of the anti-collision and anti-hanging device. The invention belongs to the technical field of fishing tackles. Fishing is an exercise beneficial to physical and psychological health, fishing is also a challenging exercise, and a large amount of practical experience teaching needs to be flexibly applied. Bottom hanging is one of frequent difficulties in fishing movement, bottom hanging generally has three conditions: hook bottom hanging, hook group bottom hanging and hook group tangent by obstacles, and the bottom hanging risk can be reduced to a great extent. As is well known, fish schools often like places with structures and obstacles at the water bottom and can hide in the shade and avoid risks, the number of fish schools in other places is rare, many fishermen can choose places with structures and obstacles to fish, and the risk that hook sets are hung on the bottom is increasingly increased. The hook group anti-collision and anti-hanging device elaborately made of a light elastic material is connected to the rear end of the hook group, collides with an obstacle before the hook group during take-up and bounces off before the hook group is hung to the obstacle, the hook group at the front end is protected against instantaneous collision and wire cutting, and a sufficient gap is reserved for take-up.

This invention discloses an underwater protective structure and an underwater data cabin. The underwater protective structure includes a bracket, a protective frame, and a first connecting column. The bracket is used to install and support the underwater data cabin. The protective frame is installed above the bracket, and a grille is installed on the protective frame to protect against fishing net snagging and impacts from heavy objects. The bracket and the protective frame are connected by the first connecting column. One end of the first connecting column is fixedly connected to the protective frame, and the other end is fixedly connected to the bracket through a connecting structure. The connecting structure enables quick assembly and disassembly of the bracket and the protective frame, improving the assembly and disassembly efficiency of the underwater protective structure. The underwater protective structure proposed in this invention can effectively prevent fishing net snagging and impacts from heavy objects, which is beneficial to protecting the stability and safety of the underwater data cabin and extending its service life.

1. The name of this design product: Lead sinker (claw-shaped long-distance casting anti-snagging). 2. Purpose of this design product: lead sinker for fishing. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: Stereoscopic drawing 1. 5. The bottom view has been expressed in the stereogram 2 and is omitted.

The underwater desilting and obstacle removing device is used for assisting in desilting on a salvage ship, the underwater desilting and obstacle removing device comprises a mounting beam, a mounting plate and a plurality of salvage rakes, the mounting plate is mounted on the mounting beam, the salvage rakes are mounted on the mounting plate at intervals, the salvage rakes are J-shaped, and V-shaped rake thorns are arranged in the middles of the salvage rakes. According to the underwater desilting and obstacle clearing device, a structure combining the mounting plate and the mounting beam is designed to form a mounting foundation, the salvaging rake and the rake thorns are arranged on the mounting plate, underwater waste fishing nets and cables can be quickly salvaged before underwater desilting by means of the salvaging rake and the rake thorns, obstacles are cleared away for subsequent underwater desilting, and the underwater desilting and obstacle clearing device has the advantages of being simple in structure and convenient to use. And the dredging effect is improved.

The present invention relates to the field of water environmental protection technology, and in particular to an underwater abandoned fishing net cleaning device. The technical problems to be solved are: impurities attached to abandoned fishing nets cannot be cleaned away during cleaning, but instead drift into the ocean, polluting the marine environment; and marine debris on the abandoned fishing nets, caused by pulling on them during cleaning, falls and drifts into the ocean, preventing them from being cleaned and removed from the ocean. The technical solution of the present invention is an underwater abandoned fishing net cleaning device comprising a fixed cylinder and a mechanical clamp, wherein the mechanical clamp is movably connected to the fixed cylinder. The present invention utilizes the mechanical clamp to clamp the loose portions of abandoned fishing nets caught on reefs, and utilizes a mechanical cutter to cut the loose portions, thereby achieving the disposal of the loose portions of abandoned fishing nets caught on reefs. This prevents divers from snagging the loose portions of abandoned fishing nets caught on reefs during handling, resulting in multiple snagging of the abandoned fishing nets on the reefs and increasing the difficulty of cleaning.

The utility model discloses a fishing box for exercising hand fineness of children, which comprises a bottom box, the top of the bottom box is open, at least one sliding shaft is mounted on the outer side of the bottom box, at least one adjusting enclosure frame is adjustably mounted on the sliding shaft, a plurality of barrier net lines are mounted in the enclosure frame, and toy fishes are placed in the bottom box. The body position of the toy fish can be adjusted according to the requirements of the toy fish with different sizes, so that the toy fish can smoothly penetrate through the obstacle net line, the hand fineness of a child is effectively exercised, and the development of the body and the brain of the child is promoted.

The invention relates to a multi-degree-of-freedom bionic Dharmor shark robotic fish and a control method thereof, and belongs to the technical field of underwater bionic robots. Based on the biological form and movement mechanism of the bionic Dammox shark, through the collaborative structure of the fish head module, the fish body module and the fish tail module and the multi-joint propelling system driven by the three-steering-engine grading line, the problems that a traditional propeller is large in noise, too high in rigidity and difficult to adapt to complex terrains are effectively solved; meanwhile, the built-in gravity center adjusting module dynamically adjusts the counter weight position through a stepping motor and a lead screw mechanism, autonomous pitching balance and posture optimization of the robotic fish in the movement process are achieved, the maneuverability and stability of the robotic fish in a complex water area are improved, in addition, a sensing module is integrated, and the control module is combined, so that the control precision is improved. The robot fish has the capabilities of environment perception, obstacle avoidance and precise pose control, the application boundary of the underwater robot is expanded, and a high-flexibility and low-disturbance integrated solution is provided for tasks such as marine resource exploration and military reconnaissance.

The invention discloses a multi-dimensional data-based fish passing facility optimization construction method and system, and belongs to the technical field of water conservancy projects and ecological protection, and the method comprises the steps: collecting and sorting multi-source data related to fish passing; combing key activity paths of fishes in different seasons and river reaches; identifying obstacle points influencing passing and calculating the passing level under the current condition; different facility construction options are constructed for the key dam, and the improvement degree of each option on the traffic level is analyzed; performing quantitative arrangement on the improvement degree of the traffic level of each dam, and performing comprehensive evaluation according to an ecological protection target; the most suitable facility construction combination is screened out; formulating a project implementation plan and a staged ecological monitoring plan; and evaluating a construction effect and adjusting a subsequent construction plan. By the adoption of the method, the secondary influence of the construction process on river ecology can be effectively reduced, it is ensured that all the construction steps can be implemented, checked and traced, and the engineering reliability of facility construction is improved.

The invention is directed to a device that allows trolled lures (e.g., ballyhoo) to be used with decreased or eliminated snagging of the lure on grasses and weeds present in the water. The device includes a hollow, tubular body with a nose operably connected to a series of ribs via upper and / or lower arms. The connection of the ribs and arms create a tapered shape that mimics the head portion of an artificial or dead bait lure. The device further includes an upper channel that spans the length of the device, allowing fishing line to pass therethrough during use. One end of a hook guard (e.g., artificial worm) attaches to a peg positioned on the lower device arm. The second end of the hook guard slips over the point and barb of the fishing hook present on the lure. As a result, the sharp ends of the lure hook are prevented from being caught or hung by sargassum grass and other marine grasses (bay grass, sea grass, turtle grass, etc.).

This item is an auxiliary device that attaches to the end of artificial lures (lures, minnows, spoons, etc.) to prevent snagging, as shown in the reference diagram illustrating its use. This item prevents snagging by causing the hook to float upwards when the artificial lure hits the bottom. Furthermore, it moves alluringly without interfering with the movement of the artificial lure when reeling, and even when the artificial lure is not moving, it sways with the slightest water current to attract fish.