4181 results about "Fishing" patented technology

The invention relates to an ice crystal evaporator and an ice crystal water cooling device producing from the same, belonging to the technical field of refrigeration. The ice crystal evaporator is characterized in that a liquid inlet channel is formed by an evaporator tube, a liquid inlet and a liquid outlet in a tubular casing; and the outer channel of the evaporator tube of the tubular casing is divided into more than one S-shaped channel forming a water return channel through a water inlet of a water divider and a water outlet of a water collector. The ice crystal water cooling device is characterized in that the return air inlet of the ice crystal evaporator is communicated with a compressor, a condenser, a liquid feeding valve, a dry filter, a liquid feeding electromagnetic valve anda thermostatic expansion valve in sequence, and then is communicated with the liquid inlet of the ice crystal evaporator; a cooling water inlet / outlet of the condenser is connected with a cooling tower in series; and a water inlet / outlet of the ice crystal evaporator is communicated with a water circulating pump and an ice crystal energy storage tank in series. The invention has the advantages ofhigh cooling efficiency, no icing and low cooling temperature and is suitable for production of energy storage central air-conditioning, marine fishing, seafood processing, fruit, vegetable or meat processing, and the like; the cooled medium is municipal water.

The invention discloses an euphausia superba fishery change prediction method based on an ocean circulation-sea ice-species distribution coupling model, and relates to the technical field of ocean science. Euphausia superba fishery historical observation data, satellite remote sensing data and reanalysis data are collected, euphausia superba resources and environmental data are integrated, and the euphausia superba fishery change prediction method based on the ocean circulation-sea ice-species distribution coupling model is obtained. Constructing a polar region resource environment database covering total elements of physics-biology-environment; and based on an FVCOM model, constructing an ocean circulation-sea ice coupling model of a surrounding sea area of the peninsula of the south pole, and simulating and verifying physical environment characteristics of a target sea area. By constructing the ocean circulation-sea ice-species distribution coupling model, integrating multi-source data and analyzing a cooperative driving mechanism of a multi-scale physical process to euphausia superba resource change, compared with a traditional method, the change of an euphausia superba fishery can be simulated and predicted more accurately, and the method has the advantages of being high in practicability and the like. And the problem of inaccurate prediction caused by limited space-time coverage rate of observation data is effectively solved.

The invention provides a visible light and infrared fusion-based river channel fish banning ship monitoring method and system, and relates to the technical field of computer vision, and the method comprises the steps: firstly obtaining a visible light image sequence and an infrared image sequence of a river channel monitoring region; ship visual feature extraction and thermal feature extraction are carried out on the visible light image sequence and the infrared image sequence respectively to obtain a visible light ship feature set and an infrared ship feature set, and cross-source feature fusion processing is carried out on the two feature sets to generate a cross-source fusion feature set; and calling a pre-trained fish forbidding ship identification model to analyze the cross-source fusion feature set, generating a ship monitoring result including the ship type, the position change track and the suspected fish forbidding behavior identifier, and finally generating fish forbidding early warning information including the real-time position and behavior feature description of the suspected fish forbidding ship based on the ship monitoring result. And measures can be quickly taken to stop the fishing forbidding behavior.

The invention relates to the technical field of fishing boat monitoring, in particular to an AI camera-based fishing information acquisition system for a lamplight cover net fishing boat, which comprises a reflective point extraction module, a track fitting module, a shielding classification module, an edge redrawing module and a density analysis module. The method comprises the following steps: extracting reflective points on the surface of an underwater fish body, screening a high-brightness area, constructing a gloss response point set, analyzing a motion track of a reflective point group in combination with a multi-frame image sequence, fitting path features by adopting a random sampling consistency algorithm, and identifying a track continuity state and a motion mode change. And performing shielding state classification on the path features based on a support vector machine model, judging extension shielding, cross shielding or boundary separation types, performing direction vector alignment and path matching redrawing on the edge contours of the reflective points according to a classification result, and recovering contour missing caused by shielding. And multi-granularity data support is provided for fish catch statistics by analyzing a brightness change track of a fin ray region in a redrawn edge path.

The invention discloses a fishery sea area monitoring system based on satellite remote sensing, and belongs to the technical field of fishery monitoring, and the system specifically comprises a remote sensing data acquisition module which obtains and preprocesses sea surface temperature, chlorophyll concentration and sea surface height abnormal data; the buoy data acquisition module synchronously acquires temperature-salinity profile data of the Argo buoy array, and the layout density of the Argo buoy array is dynamically adjusted along with historical fish catch and ocean frontal surface intensity; the space-time alignment module divides a time window through an orbital period, corrects space offset in combination with a buoy drift trajectory, sets a time buffer area based on a georotation flow rate and a satellite image resolution, and generates a space-time unified three-dimensional marine environment data set; the fishery suitability calculation module constructs a biophysical coupling model, correlates surface chlorophyll and subsurface thermohaline structures, and calculates the suitability index of each water layer; the fishery division module intelligently defines a core area and an edge area according to the index three-dimensional distribution characteristics; according to the invention, accurate fishery identification based on multi-source data fusion is realized.

The invention relates to the technical field of intelligent fishing, in particular to an intelligent fishing method for effectively improving fishing efficiency, which comprises the following steps: S1, constructing a fish school calculation sub-model: recording historical fish school data, environment data and fishing data, and constructing a fishing calculation model according to the data; s2, ecological protection and optimization: setting a dynamic threshold value and a trapping forbidding rule, monitoring environmental data in real time, and embedding the data and a fishing policy rule into a calculation model to realize strategy self-adaption of different water area scenes; on the basis of the fish school calculation sub-model and the environment prediction sub-model, satellite remote sensing and sonar detection are combined, the positioning error of the fish school gathering area is greatly reduced, the navigation path optimization time of the fishing boat can be shortened, the fish catch per unit time is greatly improved, and through the S-shaped navigation path and the electronic pulse driving technology, the fish school gathering efficiency is improved, and the fishing efficiency is improved. Edge computing equipment is matched to coordinate multiple ships to form a surrounding net, and the cluster fishing success rate is greatly increased.

A fishing jig that allows for efficient adaptability, enabling swift transitions between different styles and weights of jig heads without the need for laborious retying. The jig incorporates a screw-on / off mechanism that facilitates the rapid and secure interchangeability of jig heads, eliminating the downtime associated with traditional methods. This expedited swapping capability not only optimizes time spent on the water but also ensures an uninterrupted pursuit of the most suitable bait for the prevailing fishing conditions. Moreover, the jig's user-friendly quick-swap feature accommodates individuals with limited dexterity, enhancing accessibility for a broader range of anglers.

The invention discloses a maneuvering fish searching platform system and a maneuvering fishing method.The maneuvering fish searching platform system is characterized in that one or more of a marching power assembly, a fish luring device and a fish searching device are detachably integrated on a buoyancy body assembly, the buoyancy body assembly can correspondingly march on water, and meanwhile when the fish searching device detects that a fish school appears within a preset distance, the buoyancy body assembly is driven to move back and forth; the fish luring device starts a fish luring working condition, so that a fish school is close to the fish luring device and correspondingly gathers, and the functions of flexibly and visually searching and luring the fish are realized, so that the device has the characteristics of flexibly and efficiently searching and luring the fish by adding the maneuvering function, conditions are provided for follow-up net fishing or rod fishing, and the fish luring efficiency is improved. And through the method, multiple persons can participate in fish searching and fish luring activities, so that the characteristic of enjoying fishing fun is achieved, the interestingness of the activity process is increased, and the method has a better application prospect and a higher popularization value.

The invention relates to the technical field of intelligent aquaculture and automatic processing, in particular to an appearance characteristic-based hippocampus intelligent grading and pond-dividing culture method and system, and the method comprises the following steps: S1, collecting sparse visual data and multi-source physiological data of hippocampus; s2, generating a three-dimensional digital twinborn model based on the sparse visual data; calculating a growth state grading index based on the three-dimensional digital twinborn model; s3, calculating a physiological stress index based on the multi-source physiological data; s4, comparing the physiological stress index calculated in real time with a preset safety stress threshold value and a critical stress threshold value, and generating a hierarchical adaptive correction strategy; s5, according to a grading self-adaptive correction strategy, controlling a flexible mechanical arm to execute fishing and pond separation operation; according to the method, the appearance and physiological data of the hippocampus are synchronously collected in a non-contact mode, the technical problems that the real condition of the hippocampus cannot be evaluated and damage is possibly caused due to target stress response caused by traditional physical intervention are solved, and the authenticity and effectiveness of original data are guaranteed.

The utility model discloses a fishing rod with a line arranged inside, which comprises a rod body, a mounting rack, an adjusting knob and a rocking handle, and the rod body is provided with a mounting groove; a transmission shaft is rotationally connected to the mounting frame in the axial direction of the rod body, a force unloading piece is arranged at one end of the transmission shaft, a winding reel sleeves a main body of the transmission shaft, one end of the winding reel abuts against the force unloading piece, a rotating shaft is rotationally connected to the mounting frame in the radial direction of the rod body, and the rotating shaft is in transmission connection with the transmission shaft and used for driving the transmission shaft to rotate; the adjusting knob is in threaded connection with the tail part of the mounting frame and is propped against the winding reel; the rocking handle is arranged in the mounting groove and comprises a driving arm, a handheld part and a supporting frame, one end of the driving arm is in driving connection with the rotating shaft, the other end of the driving arm is rotationally connected with the handheld part, the driving arm is close to the supporting frame, and the supporting frame is movably connected to the mounting frame so that the driving arm can be exposed or hidden in the mounting groove. According to the technical scheme, the stability and effectiveness of force unloading of the fishing rod with the inner line are enhanced, and the portability of the fishing rod with the inner line is improved.

The invention relates to the technical field of catch safety tracing, and discloses a block chain verification method for catch quality safety tracing. The method comprises the following steps: acquiring environmental parameter data of catches in the links of fishing, transportation and storage through a distributed sensor network, and encrypting according to a timestamp sequence to generate a catches environmental data chain; key environment indexes are extracted based on the data chain, an abnormal deviation degree is calculated by using a dynamic weight distribution algorithm, and a catch quality risk score is generated; dividing risk levels according to the risk scores, mapping data of different risk levels to a block chain differentiation storage layer, and constructing a fragment storage structure; performing redundancy verification on the high-risk data through an intelligent contract triggering mechanism, and calling a consensus node to perform cross verification to generate a verification result; and performing association analysis on the verification result and the risk score, updating the risk tag and synchronizing the risk tag to a block chain distributed account book. According to the method, full-link data tracing and verification of the catches are realized, and the data credibility and the quality control accuracy are improved.

The invention relates to the technical field of fishing port safety monitoring, and discloses a fishing port fishing boat berthing safety monitoring system. The system comprises a fishing boat dynamic sensing module which collects dynamic position and attitude data of each fishing boat in a fishing port in real time; the berth state analysis module generates berth occupation state distribution information based on the data; the environmental parameter acquisition module acquires fishing port hydro-meteorological parameters in real time; the safety constraint initialization module outputs an initial safety monitoring constraint including an allowable yaw threshold value and a maximum allowable collision risk value in combination with a berth occupancy state and hydro-meteorological parameters; the parking risk assessment module executes risk quantitative analysis and generates risk level identification data by taking the initial safety monitoring constraint as a condition; a scheduling parameter optimization module optimizes berth resource scheduling according to the risk level identification data to obtain safety scheduling control parameters; and the alarm signal generation module converts an alarm dimension according to the safety scheduling control parameter and the dynamic position data updated in real time, and outputs a multi-stage acoustic alarm signal.

The invention relates to the technical field of roe breeding, in particular to a salmon roe breeding and hatching integrated device and method.The device comprises a hatching pond, and a partition plate is arranged in the center of the hatching pond and divides the hatching pond into a hatching cavity and a breeding cavity; an overflow pipe capable of sliding is arranged on the partition plate; a filter assembly is arranged in the breeding cavity and comprises a mounting frame and a filter screen; through linkage of the overflow pipe and the filter screen, automatic regulation and control of water quality purification and fry protection in the salmon egg hatching process are achieved. The self-adaptive angle adjustment of the filter screen along with lifting of the overflow pipe is matched with the clearance channel, efficient separation of fry and impurities is achieved, the survival rate of the fry is guaranteed, the hatching environment is kept clean through concentrated fishing of the impurities, hatching conditions simulating the natural water flow period are provided for salmon demersal eggs, egg adhesion is reduced, the hatching efficiency is improved, and the survival rate of the salmon is increased. And the excellent breeding target of the salmon fries is achieved.

The invention discloses a fishery sea fishing resource assessment method and device, electronic equipment and a storage medium. The method comprises the steps of obtaining multi-dimensional data information of a to-be-assessed target sea area; determining a plurality of evaluation factors in the data information of each dimension; constructing a hierarchical structure model of fishery and sea fishing resource evaluation based on the multi-dimensional data information and the corresponding evaluation factors; based on the hierarchical structure model, determining the data information of each dimension and the index weight of the corresponding evaluation factor through an analytic hierarchy process; constructing a fuzzy relation matrix through fuzzy mapping representation based on the evaluation factor in combination with a preset comment set; performing fuzzy synthesis operation according to the index weight and the fuzzy relation matrix to obtain a fuzzy comprehensive evaluation result; and determining a final evaluation result of the target sea area based on the fuzzy comprehensive evaluation result. The method can accurately realize fishery sea fishing resource evaluation, and can be widely applied to the technical field of fishery resource evaluation.

An improved multi functional fishing rod holder made of steel wire includes a circular base (1), compression coil (2), uniquely designed square washers (3), bolt (4), and wing nut (5) to create a stand alone fishing rod holder. In accordance with the invention the stand alone fishing rod holder can be adapted to fastening to a variety of surfaces such as a pale or wall by incorporating a “U” shaped extension arm (6) with thumb screw (7) thereby providing the ability to fasten fishing rod holder to a variety of surfaces such as a pail. In addition using “L” plate (11), spacer (9) and lock washer (10) and or mount plate (12) creates ability to mount on a flat surface such as a wall.

The invention relates to an introduction structure of a fisher, which belongs to the field of oil-gas field development and comprises an expansion drive, a base is arranged at one end of the expansion drive, an expansion guide structure is arranged at the other end of the expansion drive, and a flow guide structure is arranged on the inner side of the expansion drive. The expansion guide structure comprises expansion connecting rods and a plurality of rigid expansion flaps, the end, away from the base, of the expansion drive is connected with the rigid expansion flaps, and the expansion connecting rods are connected between the adjacent rigid expansion flaps. The expansion guiding structure completes expansion and folding actions through expansion driving, the expansion guiding structure enlarges the guiding area through the expansion action and also enlarges the projection area, and the expansion guiding structure pushes a fish in the guiding area through the folding action, so that the fish is correctly guided into the fishing tool. The invention provides an effective guide area in a larger range, and enhances the adaptability of the introduction structure to the fish form, thereby improving the efficiency and success rate of the fishing operation.

The utility model relates to the field of folding fishing platforms, in particular to an integrated foldable storage fishing platform and fishing platform, which comprises a split type locking sleeve fixedly mounted at the top corner of a platform plate and provided with an insertion cavity for insertion of supporting legs, and the insertion cavity has an insertion direction extending from the top of the split type locking sleeve to the bottom of the split type locking sleeve. The support leg is provided with a first insertion position and a second insertion position along the insertion direction; the rotating piece is rotatably mounted in the split type locking sleeve and provided with a rotating shaft perpendicular to the insertion direction, and a penetrating cavity allowing the supporting foot to penetrate through is formed in the rotating piece; the effect of rotating the supporting legs to the back side of the table plate under the condition that the supporting legs are not completely separated is achieved through the split type locking sleeves internally provided with the rotating pieces, and the technical problems that in the prior art, a fishing table is not convenient enough to store, and the supporting legs are prone to being lost are solved.

The invention discloses an intelligent fishing point dynamic prediction method and system based on multi-source marine environment data fusion. The method comprises the following steps: step 1, access, space-time alignment and pre-screening of multi-source heterogeneous marine environment data; step 2, priori knowledge base construction and suitability modeling based on target fish ecological habits; 3, constructing a fishing point prediction model fusing the multi-time-sequence environmental characteristics and deep learning; step 4, fusing two-channel prediction results under the Bayesian framework and quantifying uncertainty; 5, generating a dynamic mask of a real-time sea condition safety threshold value and fishery regulation space constraint; 6.1, constructing a comprehensive scoring function of the risk perception function. According to the method, multi-source heterogeneous data is constructed, a target fish ecological suitability model and a depth time sequence prediction model are combined, the fishing point posterior probability is generated through a Bayesian fusion mechanism, the prediction uncertainty is quantified, and dynamic fishing point recommendation with risk perception and compliance safety is realized.

A marine photovoltaic MPPT control method based on a chaos fishing and perturbation observation method comprises the following steps that the population number of fishers is determined in a preset area through Tent chaos mapping, then the positions of the fishers are initialized, and the positions of the fishers are calculated in combination with different duty ratios to obtain corresponding fitness values; carrying out global search in a preset region according to the fitness value by utilizing a large step length strategy of a fishing optimization algorithm to obtain a region with a global optimal duty ratio, then switching to local tracking, and carrying out local search on the region with the global optimal duty ratio by adopting a small step length strategy to obtain a local optimal duty ratio; the local optimal duty ratio is used as the initial duty ratio of the perturbation and observation method, and then further search is carried out to obtain the optimal duty ratio, namely the maximum power point. The method can track the global maximum power point, and is suitable for different photovoltaic systems and illumination conditions.

The invention provides a transporting device for a plastic fishing raft and an operation method of the transporting device. The transporting device comprises a plastic fishing raft body. The rail assembly is fixedly installed on a walkway plate of the plastic fishing raft body through a rail fixing frame, the rail assembly comprises a cross rail and a linear rail which are installed in a crossed mode, and a positioning groove and a climbing block are arranged at the crossed position; the cargo carrying assembly comprises a conveying frame, a handrail and a cargo body, the cargo carrying assembly is movably installed on the rail assembly through a power assembly, the power assembly comprises driving motors symmetrically arranged at the front end and the rear end of the bottom of the conveying frame, and each driving motor drives wheels on a wheel shaft to rotate through a driving gear; the treads of the wheels are matched with the track contact surfaces, and the rims of the wheels are matched with the side edges of the track assembly. The mechanical level of mariculture operation is remarkably improved, and the problems that traditional manual carrying is low in efficiency and poor in safety are solved.

The invention relates to the technical field of monitoring, in particular to an ocean monitoring system and method based on big data mining, and the method comprises the steps: obtaining the traveling track and moving time data of a fishing boat generated by a positioning system arranged on the fishing boat; if it is judged that the staying time of the fishing boat in a certain area exceeds a preset threshold value based on the traveling track and the moving time data, marking the fishing boat as a suspicious boat, and collecting marine environment data corresponding to the area; when the suspicious ship is subsequently confirmed to be subjected to the fishing activity, generating a fishing data set according to the marine environment data collected in the corresponding period; a machine learning algorithm is adopted to train a marine monitoring point prediction model based on the fishing data set; and based on the marine environment data obtained through real-time monitoring, adopting a marine monitoring point prediction model to predict an excessive fishing risk area and generating early warning information. Early warning can be performed on the fishing position in the ocean according to the fishing data of the ship, so that a key area can be identified in advance, and the supervision efficiency is improved.

The invention discloses an automatic courtyard pool floating object salvage system based on image recognition, and relates to the technical field of intelligent robots, and the system comprises an image sequence acquisition module which is used for continuously capturing and transmitting an image sequence; the hydrological state sensing module is used for quantifying the dynamic and morphological characteristics of the water surface to obtain an average drift velocity vector and a water surface gradient field; the visual target positioning module is used for detecting a floating object to obtain an apparent two-dimensional coordinate vector; the trajectory fusion prediction module is used for fusing the average drift velocity vector, the water surface gradient field and the apparent two-dimensional coordinate vector, and calculating predicted physical coordinates; and the salvage operation execution module is used for receiving the predicted physical coordinates and driving the mechanical arm to complete salvage operation. According to the method, hydrological perception and visual positioning are fused, visual errors caused by dynamic disturbance of the water surface are corrected, the floating object track is predicted in combination with system delay, salvage operation is innovated from passive following to active interception, and the success rate and efficiency are remarkably improved.

The invention provides a three-dimensional multi-dimensional oceanic nekton monitoring method based on artificial intelligence, and relates to the technical field of oceanic nekton monitoring, and the method comprises the steps: deploying a temperature-salinity-depth section plotter and an acoustic Doppler flow velocity section plotter, collecting data, configuring an environment parameter data set, obtaining a three-dimensional environment parameter data set, and obtaining a three-dimensional environment parameter data set; and a multi-dimensional environment parameter database is generated. Various ocean fishery resource investigation means are fused, an advanced artificial intelligence method is applied, three-dimensional multi-dimensional dynamic monitoring of the ocean swimming animals is achieved, on one hand, the number composition and space-time distribution of the ocean swimming animals, especially the vertical distribution characteristics can be monitored, the population dynamics of the ocean swimming animals and the relation between the population dynamics and environmental factors can be revealed, and on the other hand, the population dynamics of the ocean swimming animals can be monitored. By monitoring the swimming animals, basic data can be provided for population resource evaluation, and the method serves formulation of fishing quota of ocean economic swimming animals, delimitation of ocean protection areas and the like.

The invention discloses a sustainable luring ecological floating island system which is characterized in that fish schools in an open type water area are induced to enter a water area where an ecological floating island is located through planned enhancement releasing feeding and going out, and the fish schools in the water area where the ecological floating island is located are captured through a fishing device and put into a besieging space. The method can ensure that the species and number of aquatic organisms in an ecological floating island ecological system are kept relatively stable within a certain time, conforms to the development concept of sustainable fishery, can enable fishing and fishing pleasure and ecological environment protection to cooperatively develop, can ensure that the fishing and fishing pleasure can be continuously and healthily carried out for a long time, and has a wide application prospect. Therefore, a sustainable and stable fishing place is provided for fishing enthusiasts through a sustainable inducing and breeding combined mode, and meanwhile protection and recovery of a water area ecological system are considered; the invention further discloses a sustainable fishing method of the sustainable luring ecological floating island system, and by means of a sustainable luring combination mode of the ecological floating island system, catching and fishing activities can be continuously carried out.

The utility model discloses a fishing gear storage box which comprises a box body and a turning cover connected to the upper end of the box body in a rotating mode, and a first fishing gear frame and / or a second fishing gear frame are / is detachably installed in the box body. The first fishing gear frame and the second fishing gear frame are arranged in the box body, the first fishing gear frame can be used for neatly placing a plurality of lead head hooks, the second fishing gear frame can be used for neatly placing a plurality of JIG fake baits and other fake baits, and the JIG fake baits and the other fake baits are not prone to falling off.

The invention discloses a fishing boat automatic positioning early warning method and system based on Beidou navigation, and belongs to the technical field of Beidou navigation, and the method comprises the steps: collecting positioning data in real time, extracting a signal-to-noise ratio abnormal fluctuation rate and a positioning satellite number change rate abnormal value, building a multi-path error grade evaluation model, and carrying out the automatic positioning early warning of a fishing boat. Error grades are divided, and potential error areas are identified in combination with geographic space analysis; for a moderate error section, a signal quality dynamic weighted interpolation method is adopted to reconstruct a track, and finally corrected track data and early warning information with a label are output, so that a more accurate risk judgment basis is provided for a fishery administration supervision platform, high-robustness processing and intelligent early warning of positioning data in a complex environment are realized, and the accuracy of risk assessment is improved. And the accuracy and reliability of offshore operation supervision are improved.

An embodiment of a fishing fly box includes a generally rectangular open case defining an interior space for holding fishing flies including ferromagnetic hooks. The case is defined by a side wall structure extending from a base surface. A locking lid is configured for sliding movement along opposed top edges of the side wall structure, between an open position and a closed position in which the lid is slid forward with its leading edge abutting an edge of the case at the first side wall of the case. One or more magnets are positioned in the side wall structure or base surface. A blade edge is attached to the case in the interior space and exposed at a notch formed in the side wall structure, and is covered by the lid with the lid in the closed position.

The utility model discloses an electronic brake gear adjusting mechanism for a fishing reel, which relates to the field of fishing gears and comprises a mounting base, a reel seat, a control circuit board, a lifting guide rail device and a lifting guide claw, the lifting guide rail device is rotatably arranged above the reel seat, and the upper end of the lifting guide rail device is connected with a gear knob component for driving the lifting guide rail device to rotate. A spiral guide rail is arranged on the outer wall of the lifting guide rail device, the lower portion of the lifting guide claw is located in an inner cavity formed by the installation base and the wire wheel base and located above the control circuit board, an induction magnet A and a magnetic induction element are correspondingly arranged on the lower portion of the lifting guide claw and the control circuit board, and the upper portion of the lifting guide claw extends out of the wire wheel base and is erected on the spiral guide rail. The lifting guide rail device rotates to drive the lifting guide claw and the induction magnet A to vertically ascend and descend, and the control circuit board adjusts the power-on current intensity of the coil assembly according to the change of a magnetic induction signal caused by the change of the distance between the induction magnet A and the magnetic induction element. According to the utility model, the accuracy and the flexibility of brake force adjustment are greatly improved.

The utility model discloses a fishing reel floating magnetic brake device, which relates to the technical field of fishing tackles, and comprises a reel seat, a magnet component and an adjusting mechanism, the adjusting mechanism drives the magnet component to move up and down to adjust the brake force of the reel, and the magnet component comprises a base, a sliding block, a spring, a magnet array and a bottom plate. A plurality of protruding spring installation grooves are formed in the bottom end face of the base, guide grooves matched with the spring installation grooves are formed in the sliding blocks, the spring installation grooves are inserted into the guide grooves so that the sliding blocks can slide outwards, the springs are arranged in the spring installation grooves, and the two ends of each spring abut against the inner wall of the corresponding spring installation groove and the inner wall of the corresponding guide groove respectively. The bottom plate is fixed to the bottom of the base and axially limits the sliding block. Electromagnetic attraction force generated by rotation of the spool is utilized to drive the sliding block and the magnet array to move, the distance between the magnet and the spool is automatically changed, braking force is automatically and smoothly adjusted along with the rotating speed of the spool, wire explosion is prevented, the throwing distance and stability are improved, the structure is compact, and work is reliable.

The invention discloses an ROV system carrying a multi-degree-of-freedom mechanical arm and a using method, the ROV system comprises the multi-degree-of-freedom mechanical arm, a collecting net cage, a plurality of underwater cameras, a plurality of LED lamps, a sonar and a plurality of underwater sensors, and by carrying the multi-degree-of-freedom mechanical arm, the flexibility of the mechanical arm is improved; (2) a plurality of underwater cameras are installed on the two sides of an ROV to observe the environment, installed near a mechanical arm joint to observe the grabbing condition and installed on a catching cage to observe the collection condition of marine products; (3) a leakage-proof catching cage is specially designed, so that the caught marine products are prevented from leaking; 4) a biological recognition algorithm is provided, target species and non-target organisms are distinguished based on AI image processing, and the fishing efficiency is improved; (5) a sonar and a near-field sensor are arranged, and ROV underwater obstacle avoidance and terrain adaptation are achieved; and (6) ROV bottom-sitting operation is provided, different from a traditional ROV design that the buoyancy is slightly larger than the weight, the design gravity of the ROV is slightly larger than the buoyancy, so that the ROV can carry out bottom-sitting operation in a free state, and interference of a propeller to the environment is reduced.