97 results about "Cage aquaculture" patented technology

The invention discloses a deep and far sea cage culture typhoon disaster prevention and after-disaster rapid recovery method, which comprises the following steps of: carrying a high-definition camera by using an unmanned aerial vehicle to aerially photograph a cage water surface structure before a disaster, acquiring an underwater image by an underwater robot through sonar hierarchical scanning and the camera, and generating structure data and fish school data before the disaster; weak points such as frames, nettings and anchor chains are analyzed through three-dimensional modeling and are repaired and reinforced, the stocking density is optimized in combination with typhoon information, the risk of facility damage and fish loss is reduced, structural data and fish school data are repeated after a disaster, and the pre-disaster standard serves as a reference to compare and evaluate the frame damage degree, the nettings damage degree, the anchor chain breakage degree and the fish school escape or death degree; and generating a graded repair scheme and a disaster relief plan. According to the method, the detection precision and the evaluation efficiency are improved through multi-device cooperation and data fusion, the damaged part is rapidly positioned, the recovery strategy is optimized, and an efficient disaster prevention and reduction and after-disaster rapid recovery solution is provided for deep and far sea cage culture.

The invention discloses a satellite image-based marine ranch culture area distribution information extraction method and system. The method comprises the following steps of S1, making a marine ranch raft type and net cage culture area semantic segmentation data set based on a high-resolution optical satellite image; s2, constructing a bidirectional Fourier convolution long short-term memory network; s3, training a bidirectional Fourier convolution long short-term memory network by adopting the semantic segmentation data set; and S4, carrying out image segmentation on satellite image test data by adopting the trained bidirectional Fourier convolution long-short-term memory network to obtain marine ranch culture area distribution information. Compared with the prior art, the method has the advantages that feature extraction is carried out in the frequency domain and the space domain at the same time, the capturing capacity of the model for marine ranching raft type and cage culture area details and global features is enhanced, and the image segmentation precision and efficiency are remarkably improved.

The invention relates to the technical field of aquaculture, and particularly discloses paracoccus pantotrophus P.p-O8 and application of the paracoccus pantotrophus P.p-O8, the paracoccus pantotrophus P.p-O8 is preserved in the China General Microbiological Culture Collection Center (CGMCC), and the preservation number of the paracoccus pantotrophus P.p-O8 is CGMCC NO.26522. The invention relates to a microbial inoculum prepared from paracoccus pantotrophus P.p-O8. The method has a huge application prospect in improving the quality of aquaculture water and repairing the polluted sediments in the cage culture area, improves the water environment quality and the survival conditions of aquaculture organisms, repairs the eutrophicated polluted ecological environment, and has high environmental protection value and economic benefit.

The invention relates to the technical field of net cage culture, and discloses a culture net cage gauge pile lifting mechanism which comprises a connecting plate and a supporting column, and the supporting column is sleeved with the connecting plate in a sliding mode; a lifting assembly used for driving the connecting plate to climb along the supporting columns is arranged outside the connecting plate. The lifting assembly comprises a first tooth, a second tooth and a third tooth which are arranged on the outer side of the supporting column. And a switching assembly. When the gear cannot move normally due to the fact that the second teeth have problems, the positions of the group where the second teeth having problems are located and the group where the third teeth are located can be replaced, it is guaranteed that the gear can move normally in the follow-up process, it is guaranteed that the net cage can ascend normally, and normal progress of the work progress is guaranteed; and through cooperation of the control assembly, the pump body, the annular pipe and the spraying pipe, the second teeth with the problems can be marked, the second teeth with the problems can be found more quickly in the follow-up process, and therefore maintenance can be conducted more quickly.

The invention discloses a fish school quantity measurement method based on cage culture fish school sonar monitoring image denoising, and the method comprises the steps: obtaining an identified fish coordinate point P (x, y, d) of each identified fish in each single-circle sonar scanning image in one-time overall scanning of a target cage through step 1, step 2, step 3 and step 4 according to Dlt; the identified fish coordinate points are divided into a plurality of point clouds according to the spatial position relation condition of 0, do, all the point clouds are combined into an actual fish coordinate point, noise points, generated due to repeated identification, in the identified fish coordinate points obtained in the third step are filtered, boundary reflection noise points are filtered through the fifth step, and the final fish coordinate point is obtained. The number of fish schools in the target net cage is obtained by counting the coordinate points of the remaining identified fishes in the sixth step; therefore, the accuracy of fish school quantity measurement can be improved.

The invention discloses a cage culture underwater netting damage identification method. According to the method, through a netting damage detection module carried by an underwater robot, a semantic segmentation model is utilized to segment a netting image, and a segmentation result is optimized in combination with image post-processing, so that a netting damage area is accurately identified; when it is detected that the netting is damaged, the underwater robot slowly gets close to a normal netting near a netting damage area, and a marker is fixed to the netting through an elastic clamp of the netting damage marking device; a stroboscopic signal lamp is arranged on the marker, so that the diver can be helped to quickly find out the damaged netting. The device has the advantages that the netting damage detection accuracy is high, the marking device is simple in structure and can be recycled for multiple times, the problem that the netting damage is difficult to find quickly when a diver maintains the netting is effectively solved, and the intelligent level of cage culture is improved.

The invention relates to the technical field of aquaculture, in particular to a net cage culture fish ingestion behavior recognition and accurate feeding system and a method thereof.The system comprises a multi-modal data acquisition module arranged around a net cage and used for acquiring video data and biological density information of fish behaviors, a data preprocessing module used for coding and compressing the video data, and a data processing module used for processing the coded and compressed video data; the biological density information is packaged, the 3D space-time attention analysis module receives the processed data, space-time features are extracted through a 3D deep learning model, and fish feeding behaviors are recognized. The multi-modal feature fusion module adaptively fuses the spatial-temporal features of the video data and the biological density information to generate ingestion intensity data, and the feeding control module calculates the vibration frequency according to the ingestion intensity data and controls the opening state of a netting door in a net cage, so that precise feeding is realized. The problem that a single data source is low in recognition accuracy in a complex underwater environment is solved, the recognition accuracy of the system under various water quality conditions is improved, and accurate feeding of fishes is achieved.

The invention relates to the technical field of aquaculture and ecological environment management, and discloses a novel pond ecological circulation culture method which comprises the steps that a pond is divided into four vertical functional areas including an upper-layer floating bed planting area, a middle-layer net cage culture area, a bottom-layer benthic purification area and a microbial conversion area, a water circulation system is arranged in a matched mode, the area needed by pond site selection is 3000-4000 m, and the water depth is 3.0-3.5 m. The water quality is automatically controlled through a sensor containing dissolved oxygen and the like, and the biological monitoring module is automatically controlled through a high-definition camera and an AI to acquire data in real time, trigger oxygenation, move the net cage and the like; mixed feeding of'basal feed and insect protein ', cross-season crop rotation of floating bed crops and batch harvesting of benthic organisms are performed daily, equipment is maintained regularly, and ecological circulating breeding is achieved.

The invention relates to the technical field of deep sea culture net cages, in particular to a deep sea culture net cage hovering depth-keeping system which comprises a base, a culture mechanism is mounted on the base and comprises a plurality of stand columns, adjusting mechanisms are mounted on the stand columns respectively, and adsorption mechanisms are mounted on the adjusting mechanisms; through cooperation of the adsorption mechanism and the adjusting mechanism, the net cage is firmly fixed in a culture sea area, through hovering control over the whole net cage, the net cage culture area is within the optimal salmon growth water temperature range all the year round, the marine environment of cold water mass is protected to the maximum extent, and the salmon growth environment is ensured; meanwhile, the net cage has the characteristics of storm resistance and the like, and the problems of summer and overwintering of the salmon bred in the middle latitude are solved more accurately.

The application discloses a marine net cage breeding system and a use method thereof, which comprises a net cage main body, lifting units are arranged on the two sides of the net cage main body, a sinking auxiliary unit is arranged at the bottom of the net cage main body, a breeding dome is further arranged at the top of the net cage main body, a breeding cavity is arranged in the breeding dome, and a monitoring unit is arranged in the breeding cavity; a bait feeding pipe and an air pipe which are communicated with the breeding cavity are connected to the top of the breeding dome, a breeding opening which is directed to the bottom of the net cage main body is formed in the bottom of the breeding dome, the breeding cavity and the inside of the net cage main body are communicated through the breeding opening, a bait frame which is matched with the breeding opening is further arranged in the inside of the net cage main body, and the bait frame is hung on one side of the breeding dome through a bait rope.

The invention relates to the technical field of aquaculture equipment, and discloses an aquaculture cage culture device which comprises a floating ring, a first sliding groove is formed in the bottom of the floating ring, a second sliding groove is formed in the top of the floating ring, and a transverse moving machine is slidably connected to the inner wall of the second sliding groove. A sliding mechanism and a cleaning mechanism are arranged in the equipment, when the outer wall of the breeding net needs to be cleaned, a power source of a transverse moving machine and a motor is switched on, the transverse moving machine slowly slides along the inner wall of a second sliding groove at the moment, and in addition, the motor drives a first gear to rotate through a driving rod; a first gear drives a square column, a sliding ring and a second cylinder to rotate reversely through a second gear, at the moment, the first cylinder and the second cylinder clamp and roll the culture net, most of larvae on the culture net are physically rolled, and attachment of barnacle marine organisms to the culture net is reduced.

The invention discloses a fish and shellfish symbiosis seaborne net cage culture system and method, and relates to the technical field of aquaculture, and the method comprises the following steps: arranging a culture net cage in an offshore sea area; fish fries are put into a surrounding net, bivalve shellfishes are put into a shellfish culture piece cage, and the shellfish culture piece cage is hung in the culture net cage; feeding bait irregularly, checking the integrity of the shellfish culture cage and the covering condition of attachments regularly, and making a treatment means according to the covering rate; in the later period of culture, the adult fishes with the body length exceeding a preset value are caught irregularly in a fishing mode, and after the culture period is finished, the remaining adult fishes are caught in a concentrated mode by increasing the height of the purse seine; the shellfish culture piece cage is lifted out of the water surface to collect adult shellfish. The culture system disclosed by the invention comprises a culture net cage and shellfish culture piece cages, wherein the shellfish culture piece cages are hung in a purse seine. According to the method, mutualism of marine fishes and bivalve shellfish can be achieved, the resource utilization rate and the culture benefits are improved, and diversified fishery development can be achieved.

This invention discloses an unmanned cage aquaculture monitoring system, belonging to the field of aquaculture monitoring technology. It addresses the problems of existing nearshore cage aquaculture equipment, such as limited functionality, poor coordination, high reliance on manual labor, and insufficient environmental adaptability during cage deployment. The system includes cage deployment, feeding, storage, a mother machine basic frame, iris feeding, opening and closing doors, undulation, daughter machine retrieval, and daughter machine devices. The mother machine has a circular, layered compartment structure, connected to feed feeding mechanisms at the top and daughter machine operation and retrieval mechanisms at the bottom. The daughter machine devices have an eight-axis drive structure, equipped with environmental monitoring sensors, mechanical claws, and a rotary flushing device, forming a collaborative operation system with the mother machine. This system can achieve automated cage deployment, precise and uniform feed delivery, real-time underwater environmental monitoring, thorough cage cleaning, and underwater waste recovery. It is adaptable to medium and high sea states, has a high degree of intelligence and automation, significantly reduces labor costs, and effectively improves the overall operational efficiency and benefits of nearshore cage aquaculture.

The present invention relates to an ecological cage aquaculture method. The method proposes a cage-based relay aquaculture model for sea cucumbers, sea urchins, and fish, wherein sea cucumbers and sea urchins are mixed in cages during the wintering period, and are combined with green pufferfish aquaculture in the summer. This achieves the comprehensive utilization of cage aquaculture, effectively avoids the risks of aquaculture of sea cucumbers and sea urchins during the high temperature period in summer, saves feeding bait, and, based on the biological characteristics of green pufferfish that feed on mollusks, removes cage attachments in a targeted manner, achieving a biological cycle and biocontrol of pollutants in marine aquaculture, reducing the labor intensity of subsequent cleaning of cage-fouling organisms. The method adopts a "well"-shaped HDPE grid cage to greatly improve the utilization efficiency of the aquaculture device. The method is equipped with an automatic feeding system to solve the problem of difficult and dangerous feeding in large cages. The method feeds bait in a scientific and standardized manner, saving feeding time and manpower input, reducing labor intensity, and greatly improving labor output efficiency.

The invention discloses an unmanned boat-net cage locking device, and relates to the technical field of net cage culture, the unmanned boat-net cage locking device comprises a net cage, an unmanned boat device and a base station, the unmanned boat device comprises a double-body unmanned boat, the upper end of the double-body unmanned boat is provided with a rotating groove, the rotating groove is internally provided with a rotating table, the upper end of the rotating table is rotatably provided with a suspension arm, and the suspension arm is connected with the base station. The front end of the suspension arm is provided with an extendable moving seat, the moving seat is provided with a water quality detection mechanism, and the upper end of the rotary table is provided with a feed feeding mechanism connected with the suspension arm. Through integration of an autonomous sensor, a depth-adjustable water quality detection pod and a suspension arm type feeding mechanism, multi-point three-dimensional water quality detection and fixed-point feed feeding can be realized for a plurality of traditional net cages in an open water area by virtue of a laser radar point cloud precise positioning technology; the stability and high efficiency of operation inside and outside the net cage are guaranteed through the lifting arm depth control and pose calibration function, and the aquaculture management efficiency is greatly improved.

The present application relates to a self-cleaning modular gravity net cage culture system, comprising: a floating assembly comprising a plurality of floating units arranged in a rectangular array; a cage assembly comprising a frame and a float, each frame being arranged on two adjacent floating units, the two ends of the frame being connected to the two ends of the two adjacent floating units, and a plurality of floats being fixedly arranged below the frame; a plurality of oyster cages being hung on the frame for oyster culture; and a cleaning assembly comprising a mounting frame and a cleaning mechanism, the mounting frame being connected to the floating assembly, the mounting frame being capable of swinging relative to the floating assembly, a plurality of the cleaning mechanisms being arranged at intervals along the mounting frame, each cleaning mechanism being capable of contacting at least two adjacent oyster cages, and / or each oyster cage being capable of contacting at least one cleaning mechanism. Compared with the prior art, the cleaning assembly of the present application can clean the oyster cages under the action of water flow and wind waves, thereby extending the time interval for cleaning the oyster cages on water to 3-6 months.

The application discloses a method for typhoon disaster prevention and rapid recovery after disaster in deep-sea net cage culture, which comprises the following steps: before the disaster, an unmanned aerial vehicle is used to take aerial photos of the water surface structure of the net cage by carrying a high-definition camera, and an underwater robot is used to collect underwater images by layer scanning through a sonar, so that structure data and fish school data before the disaster are generated; weak points such as framework, netting and anchor chain are analyzed and repaired and reinforced through three-dimensional modeling, the stocking density is optimized in combination with typhoon information, the risk of facility damage and fish loss is reduced, and after the disaster, the structure data and fish school data are repeated, the degree of framework damage, netting damage, anchor chain breakage and fish escape or death is compared and evaluated by taking the data before the disaster as a reference, and a grading repair scheme and disaster relief plan are generated. Through the cooperation of multiple devices and data fusion, the detection accuracy and evaluation efficiency are improved, the damaged parts are quickly located, and the recovery strategy is optimized, so that an efficient disaster prevention and reduction and rapid recovery solution after disaster is provided for the deep-sea net cage culture.

The present invention discloses a ship-shaped cage system for marine aquaculture, specifically a stepped ship-shaped cage system. A bow system is attached to the flow-facing side of a square frame system, and the two are arranged in a straight line and fixed to each other. The bow system is equipped with a structure that blocks the flow of water passing through the bow system. The square frame system is divided into multiple square frame units. The net system corresponding to each square frame unit encloses an independent square cage aquaculture area, and the depth of all square cage aquaculture areas decreases stepwise from the proximal end to the distal end of the bow system. This invention solves the technical problem of "improving the aquaculture efficiency of ship-shaped cage systems." The system design of the present invention fully considers the turbulence generated by varying flow rates and the fact that the diffusion range of turbulence is proportional to distance. The depth of the square cage aquaculture area is designed to be smaller the farther away from the bow system (where turbulence occurs), thereby minimizing the impact of turbulence diffusion on cage aquaculture.

The application discloses a kind of marine net cage breeding state monitoring and cleaning device, including state monitoring module and ring net cage cleaning module, state monitoring module includes base, folding mechanism and monitoring execution device, ring net cage cleaning module includes annular track, ring net cage movement device, retractable platform, turnover mechanism and collection device. Through state monitoring module, image video data and breeding environment parameter data in net cage (on water surface and at different depths and angles under water surface) are collected in real time, so that the growth of fish population in net cage, the accumulation of water surface floating objects and the integrity of net can be understood at any time by breeding personnel, automatic monitoring and cleaning are realized, the need for manual inspection is reduced, thereby reducing transportation cost and labor cost;Through ring net cage movement cleaning module, automatic cleaning of floating objects in net cage is realized, the efficiency and accuracy of cleaning are improved, and the cleanliness of net cage water surface and water quality safety are ensured.

The application discloses a four-fingered tetra intelligent net cage breeding system and method based on behavior recognition and low stress control, which comprises a flexible anti-collision light-blocking net cage module, an underwater AI behavior early warning module, a micro-bubble and sound-light soothing intervention module and a dry-free flexible transfer module. The flexible anti-collision light-blocking net cage eliminates net collision and scale shedding and visual disturbance from the physical structure, the underwater AI behavior early warning module extracts three-dimensional features of sudden change rate of swimming speed, spatial dispersion and gill cover vibration frequency to calculate a comprehensive stress index, realizes four-level grading early warning, the micro-bubble and sound-light soothing intervention module realizes targeted soothing through mute oxygenation, blue-green light and low-frequency sound waves, and the dry-free flexible transfer module realizes underwater zero-fishing transfer of fish bodies. The application improves the survival rate of four-fingered tetra by 22.6% and reduces the scale infection rate by 93.5%, solves the stress bottleneck of large-scale breeding of the four-fingered tetra and is suitable for large-scale near-shore net cage breeding of the four-fingered tetra.

A deep-sea intelligent cage aquaculture system based on photovoltaic power generation, which is disclosed by the present invention, belongs to the field of overseas large-scale aquaculture cage equipment. The present invention includes an operation and maintenance warehouse, an intelligent monitoring system, a walkway board, a photovoltaic power generation unit and a support truss. The photovoltaic power generation unit is used to provide stable power supply for the deep-sea marine cage, avoiding the problem of power transmission for the deep-sea marine cage. Through the energy storage module, the conversion of electric energy and the storage of the unused electric energy are realized, improving the utilization rate of energy. The support truss is composed of a grid expanded from a "cross shape", and the framework of the cage system is composed of a hollow multi-layer support truss. Its hollow structure ensures the buoyancy of the cage, and the multi-layer structure ensures its stability under high winds and waves. The material of the walkway board is selected as toughened glass, enabling sunlight to normally irradiate on the photovoltaic solar panel; the toughened glass is also used to form a cavity for the solar panel, reducing the heat dissipation of the solar panel through the cavity and reducing the damage of sea waves to the solar panel.

1. Name of the product in this design: Aquaculture net cage (large tropical net cage). 2. Purpose of this design: For use in large tropical cage aquaculture equipment. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The invention relates to the field of weever culture, and provides a weever cage culture method, which comprises a support and a fish culture pond provided with a first fish culture chamber, a second fish culture chamber and a third fish culture chamber, the bottom of the pond is an inclined part inclined along the third fish culture chamber, ports are arranged among the chambers, the third fish culture chamber comprises a fishing net and a fishing device, each chamber is provided with a constant temperature, oxygen and water adding system and a drain valve, and the top of the pond is provided with a sun shield. Breeding is divided into three stages, wherein the temperature is accurately controlled to be 18-20 DEG C in the egg hatching and fry rearing stage, egg yolk emulsified feed is fed, and medicated bath is conducted in stages; respectively culturing in three fish culture chambers, gradually raising the temperature to 28-30 DEG C in the adult fish growth period, and feeding crushed feed; gradually reducing the temperature to 15-25 DEG C in the spawning period of adult fishes, regulating and controlling illumination, and feeding immunity enhancing feed containing beta-glucan and vitamin C; sequentially fishing and collecting roes after spawning, cleaning each chamber, and circularly culturing. The water quality is detected every month, ammonia nitrogen and nitrite are guaranteed to reach the standard, efficient and healthy breeding is achieved, and the technical problem that the perch breeding effect is poor is solved.

The present invention relates to a bottom - sitting marine aquaculture cage structure using a bucket - shaped foundation and an installation and maintenance method thereof. It is applicable to the field of offshore fishery aquaculture, especially the seawater aquaculture field in deeper waters of the open sea. The technical solution adopted by the present invention is as follows: A bottom - sitting marine aquaculture cage structure using a bucket - shaped foundation, characterized in that: it has a cage frame, a bottom net is fixed at the bottom of the cage frame, an inner net is fixed on the cage frame in a circle, and the inner net and the bottom net cooperate to form a cage aquaculture area for main economic fish species. A circle of outer nets for reducing flow and blocking floating foreign objects is also fixed on the cage frame and located outside the inner net. The inner and outer nets cooperate with the bottom net to form an aquaculture area for clean fish species; A number of bucket - shaped foundations are evenly fixed at the bottom end of the cage frame, which serve as buoyancy barrels during the transportation of the cage structure and as negative pressure barrels when the cage structure is fixed.

The invention provides a low-energy-consumption mechanical vibration type netting cleaning robot and a working method thereof. The low-energy-consumption mechanical vibration type netting cleaning robot comprises a robot body frame, crawling crawlers are assembled on the two sides of the lower portion of the robot body frame, and a cleaning mechanism is assembled at the bottom of the robot body frame. The crawling track comprises a track row chain and spike teeth arranged in a flexible connection mode, a spike tooth adjusting mechanism is installed on the main body frame, and the extending length of the spike teeth can be adjusted to adapt to different attachment thicknesses. The cleaning mechanism comprises a propeller and vibration teeth, and a cleaning motor drives the propeller to rotate to generate negative pressure to adsorb the netting and drives the vibration teeth to rotate to generate mechanical vibration to strip attachments. High-pressure water jet is replaced by a mechanical vibration cleaning principle, so that the energy consumption is low, and the energy efficiency is high; the adjustable spike tooth track is high in adaptability, and slipping is avoided; the flexible connection spike teeth can prevent the netting from being damaged. The underwater netting cleaning device is suitable for underwater netting cleaning operation in scenes such as gravity type net cages, truss type net cages and cultivation work ships.

The invention provides a biological prevention and control method for typical fouling organisms in a southern mariculture net cage and application of the biological prevention and control method. The main idea is as follows: firstly, finding out community composition and space-time change rules of fouling organisms in a sea area, secondly, investigating main fishes in the sea area, determining bait organism composition of the main fishes, selecting fingerlings which can ingest target fouling organisms and meet cage culture conditions, and finally, carrying out culture tests. The biological control effect of the fishes on the target fouling organisms is verified. The invention further provides a method for clearing away the sea squirts attached to the southern mariculture net cage by using the feeding habit of the siganus giganteus, the problem that a large amount of manpower and material resources are consumed in a traditional sea squirt clearing technology is effectively solved, and culture environment damage caused in the traditional sea squirt clearing process is reduced; and the influence on the cultured object in the netting replacement process is reduced, so that the economic loss in the culture period is reduced. A foundation is laid for establishing a biological prevention and control sea squirt model, and the method has a very good application value in natural seawater cage culture.

The invention discloses an ecological cage culture method for red nine-pink bass, which comprises the following steps: selecting a proper sea area as a cage culture sea area, performing feed feeding and screening treatment according to the growth condition in the culture process, and performing disinfection, inspection and the like. Compared with an industrial breeding method, the method has the advantages that the facility cost and the operation cost are reduced, the breeding environment conforms to the growth rule of the red nine-pink bass, growth of the red nine-pink bass is promoted, and large-scale breeding is facilitated. Ocean space is fully utilized, land resources are saved, and the ecological pressure is small. The method has the advantages of low cost, convenience in operation, simplicity in operation, easiness in large-scale culture and eco-friendliness, can be popularized and applied in a large scale, and promotes the rapid growth of the red nine-plectropomus latifolius industry.

The invention provides a large yellow croaker full-period factory-like efficient cultivation method. The method comprises six aspects of cultivation density and grading feeding, water quality regulation and control, cultivation management and control, feeding management, disease prevention and control and daily management. According to the method, key links such as graded feeding, water quality regulation and control, feeding management and disease prevention and control are integrated, a replicable and generalizable factory efficient culture mode is formed, technical transformation of large yellow croakers from traditional sea area net cage culture to land-based factory culture is achieved, and the awkward situation that the current culture space is seriously insufficient can be effectively relieved. Through precise control of environmental factors and disease prevention and control management, the culture survival rate can be remarkably improved, the disease occurrence rate is remarkably reduced, and the overall culture benefit is superior to that of conventional offshore net cage culture.

The invention relates to the technical field of cage culture, and provides a method for improving the accuracy of a biometric device of a profile motion culture cage, which comprises the following steps of: acquiring all sonar images and corresponding direction information acquired in a rotation process; feature points are extracted based on the netting contour; filtering the feature points, and generating a sparse point set of the net cage contour by difference values; calculating a body-park radius shape coefficient based on the point set, and performing evaluation after waiting for a plurality of time intervals; the contour feature points are mapped to a three-dimensional coordinate system with sonar as an original point based on the direction angle; and the distance between the net cage contour and the sonar scanning boundary. By evaluating the deformation degree of the net, the method can effectively distinguish whether the state of the netting is good or not in data collected by equipment in one-time profile operation, biomass evaluation can be accurately carried out, if the net is seriously deformed, the equipment can give an alarm and suggest a user to carry out measurement again when the water flow is low, and the measurement efficiency is improved. And evaluation data with relatively low accuracy given by the system due to network deformation interference can be effectively avoided.