A smart feeding system for offshore jacket cage aquaculture

Abstract

The present application relates to a kind of offshore jacket encircling net aquaculture intelligent feeding system, belong to marine aquaculture bait measurement technical field, including encircling net component, encircling net lifting assembly, bunker, material conveying component, material spraying component and detection component, detection component includes multiple underwater cameras, communication module, main control module and analysis module, the information obtained by multiple underwater cameras is sent to analysis module by communication module to form aquaculture water body environment monitoring data, the number of fish school and the size that underwater camera regularly shoots are sent to analysis module by communication module;Analysis module forms feeding decision according to fish school number and feature;Material spraying component carries out material spraying according to feeding decision;Feeding decision calculation formula is as follows: Wt=e （SGR*△t+Lnw） ;Wherein △t is equal to growth cycle, SGR is specific growth rate, Lnw is the natural logarithm of initial weight, Wt is predicted target weight;F=Wt*K, F is the required feeding amount of single tail fish, K is feed conversion coefficient, can more scientificly carry out bait.

Description

Technical Field

[0001] This invention belongs to the field of marine aquaculture feeding measurement technology, specifically relating to an intelligent feeding system for offshore jacket net enclosure aquaculture. Background Technology

[0002] Research on feeders began abroad in the 1960s, earlier than in China, with Finland consistently leading the way in automated feeding systems. Arvo-tec's track-mounted automated feeding robot system can feed at fixed points or while moving. Powered by batteries, the robot automatically recharges after feeding. The control unit can simultaneously manage three robots, capable of feeding 240 ponds, demonstrating high equipment utilization and intelligence. Wahyu Pribadi et al. developed a mobile pond feeding robot using Arduino. The robot's underwater propellers can be controlled via mobile phone, guiding it to designated feeding locations within the pond. ETI's intelligent feed dispensing system reduces feed breakage and loss, significantly improving reliability and accuracy. Based on PLC control technology, the system boasts a maximum feeding capacity of 250. The system supports feed delivery pipes with a diameter of approximately 10 cm, using a flow rate of kg / min, which improves aquaculture efficiency, reduces feed loss rate, and minimizes pollution of the aquaculture environment by uneaten feed. Garcia et al. designed an intelligent feeding system for deep-sea cages. This system determines the amount of feed based on the swimming speed of the fish, water temperature, and dissolved oxygen levels. It also judges the feeding time and amount by monitoring fish behavior, achieving a sensor-based feeding mode. Von-Borstel-FD et al. developed a robotic feeding system that integrates feeding and water quality monitoring. The system has six preset feeding modes and can provide different feeds at different times. Through IoT technology, the feeding mode can be selected and the water quality can be viewed on a mobile phone.

[0003] The above system only measures environmental factors and then formulates a feeding plan, without changing the feeding plan according to the growth stage of the fish. This leads to waste of feed and increases breeding costs. In view of this, this solution was developed. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide an intelligent feeding system for offshore jacket cage aquaculture, which can make scientific and rational production and feeding decisions.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: an intelligent feeding system for offshore jacket cage aquaculture, including a cage component, a cage lifting component, a feed bin, a feed conveying component, a feed spraying component and a detection component, wherein the cage lifting component drives the cage component to move up and down, and the cage component sinks to the water to form an aquaculture area;

[0006] The hopper is connected to the material conveying assembly, and the material conveying assembly is connected to the material spraying assembly;

[0007] The detection component includes multiple underwater cameras, a communication module, a main control module, and an analysis module. Information acquired by the multiple underwater cameras is sent to the analysis module through the communication module to form aquaculture water environment monitoring data.

[0008] The number and size of the fish captured by the underwater camera at regular intervals are sent to the analysis module via the communication module.

[0009] The analysis module makes feeding decisions based on the number and size of the fish captured at regular intervals and previous feeding data;

[0010] The spraying assembly sprays material according to the feeding decision;

[0011] The formula for calculating the feeding decision is as follows:

[0012] Wt=e （SGR*△t+Lnw） Where Δt equals the growth cycle, SGR is the specific growth rate, Lnw is the natural logarithm of the initial body weight, and Wt is the predicted target body weight.

[0013] F = Wt * K, where F is the amount of feed required for a single fish and K is the feed conversion coefficient.

[0014] Furthermore, the detection component also includes a temperature sensor, a dissolved oxygen meter, and a pH meter located in the aquaculture area. The temperature sensor is used to detect the temperature and temperature changes in the aquaculture area, the dissolved oxygen meter is used to test the dissolved oxygen content in the water, and the pH meter is used to test the pH value of the water. The information acquired by the temperature sensor, dissolved oxygen meter, pH meter, and multiple underwater cameras is sent to the analysis module through the communication module to form aquaculture water environment monitoring data.

[0015] Feeding strategies are developed based on monitoring data of the aquaculture water environment, and specific growth rates and feed conversion coefficients are adjusted according to the monitoring data.

[0016] Furthermore, the enclosure assembly includes an enclosure body located between at least three guide frames, and the enclosure lifting assembly includes at least three drive groups. At least three high-position lifting points are formed at the outer edge of the enclosure body, and at least three low-position lifting points are formed near the middle of the lower surface of the enclosure body. The three drive groups are respectively used to drive the three sets of high-position lifting points and low-position lifting points located on the same side to rise and fall simultaneously.

[0017] Furthermore, the drive assembly includes a drive body, a first twisted rope roller, a second twisted rope roller, a guide wheel, a net opening lifting rope, and a net bottom lifting rope. The drive body, the first twisted rope roller, and the second twisted rope roller are disposed on the upper end of the guide frame. The first twisted rope roller and the second twisted rope roller are arranged opposite each other and have a first bevel gear on one side facing each other. The output end of the drive body is provided with a second bevel gear, which meshes with the two first bevel gears respectively. The guide wheel is disposed on the lower end of the guide frame. One end of the net opening lifting rope is fixed to the circumference of the first twisted rope roller, and the other end is fixedly connected to the high lifting point. One end of the net bottom lifting rope is fixedly connected to the second twisted rope roller, and the other end passes around the circumference of the guide wheel and is fixedly connected to the low lifting point.

[0018] Furthermore, a torque sensor is provided in the drive body, which is used to obtain the rotational torque of the second bevel gear.

[0019] Furthermore, the material conveying assembly includes a blower and a discharge pipe. The hopper and the discharge pipe are connected through a discharger. The spraying assembly includes a rotating ring, a swing drive, and a spray gun. The discharge pipe and the spray gun are connected through a hose. The rotating ring is located above the enclosure assembly, and the spray gun is located inside the rotating ring. The rotating ring is used to drive the spray gun to rotate along the axis of the rotating ring, and the swing drive is used to drive the spray gun to swing.

[0020] Furthermore, the feeding system also provides a feeding path. When the enclosure component is underwater, multiple bait spraying rings are set from the inside out with the center point of the enclosure component as the center point. The amount of bait sprayed gradually increases as the diameter of the bait spraying rings decreases.

[0021] Furthermore, the feeding system also provides a feeding path. When the enclosure component is underwater, a bait jet turbine ring is set with the center point of the enclosure component as the starting point. The bait is sprayed along the trajectory of the bait jet turbine ring, and the amount of bait sprayed decreases from the inside to the outside.

[0022] Furthermore, the feeding system also provides a method for detecting attachments on the perimeter of the fencing, including the following steps:

[0023] S1. Submerge the unloaded enclosure body underwater. The drive unit pulls the enclosure body upwards. The upward stroke is X meters after the enclosure body leaves the water surface. Record the average torque during this X-meter stroke. Use the formula: G=T 测 / ηr, G 总 =nG, which gives the weight of the netting body after immersion in water, where G is the mass calculated by a single torque sensor. 总 For the weight of the fencing body, T 测 Let η be the torque, η be the transmission efficiency, and r be the radius of the first and second rope rollers.

[0024] S2. Repeat step S1 every three months to obtain G. 总2 via G 总2 -G 总 Obtain the weight of the attached material;

[0025] S3. When the weight of the attached object reaches the set value, clean or replace the main body of the fence.

[0026] Furthermore, one end of the net opening lifting rope is fixedly connected to the outer end of the first winch roller, and the bottom lifting rope is fixedly connected to the outer end of the second winch roller. The length of a single loop around the net opening lifting rope and the bottom lifting rope on the circumference of the first winch roller and the second winch roller is greater than the distance the enclosure net body moves after leaving the water surface.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. This invention constructs a feeding decision calculation formula by collecting fish population and body size (periodic growth body size), combining aquaculture water data, and external environmental monitoring: Wt=e （SGR*△t+Lnw） With F=Wt*K, conditional feeding decisions can be implemented, allowing for more efficient and rational feeding of fish in aquaculture areas. Furthermore, the feeding decision calculation formula can be adaptively adjusted based on environmental factors, water body factors, and fish growth factors.

[0029] 2. The present invention also provides two feeding paths: one is a progressive circular feeding and the other is a turbine-line feeding, which forms a feeding path from the outside to the inside. The outer layer of bait forms an odor band, which induces the fish to move towards the body of the enclosure net. The spatial gradient distribution of bait activates the fish's active feeding behavior.

[0030] 3. An automatic detection method for the attachment of the enclosure net body is set up, which makes it easy to determine whether the enclosure net body needs to be replaced or cleaned through remote data, thus efficiently ensuring the normal operation of the aquaculture area. Attached Figure Description

[0031] Figure 1 This is a flowchart of the baiting decision-making process in this invention;

[0032] Figure 2 This is a front view schematic diagram of the perimeter fencing lifting assembly and the perimeter fencing body in the netting-retrieval state in this invention;

[0033] Figure 3 This is a front view schematic diagram of the perimeter fencing lifting assembly and the perimeter fencing body in the netting deployment state in this invention;

[0034] Figure 4 This is a partially enlarged structural diagram of the guide wheel position in this invention;

[0035] Figure 5 This is a partially enlarged structural diagram of the first and second rope rollers in this invention;

[0036] Figure 6 This is a top view schematic diagram of the first rope roller, the second rope roller, and the drive body in this invention.

[0037] Figure 7 This is a front view schematic diagram of the silo and blower in this invention;

[0038] Figure 8 This is a partial cross-sectional view of the spraying assembly in this invention;

[0039] Figure 9 This is a schematic diagram of the feeding path in Application Example 1 of the present invention.

[0040] Figure 10 This is a schematic diagram of the feeding path in Application Example 2 of the present invention.

[0041] The markings in the diagram are as follows: 1. Main body of the fencing; 2. Fencing lifting assembly; 21. Frame; 22. Drive unit; 23. First rope roller; 24. Second rope roller; 25. Guide wheel; 26. Net opening lifting rope; 27. Net bottom lifting rope; 3. Hopper; 31. Unloader; 4. Fan; 5. Discharge pipe; 6. Spraying assembly; 61. Rotating ring; 611. Gear ring; 62. Rotating shaft; 63. Servo drive motor; 64. Spray gun. Detailed Implementation

[0042] To make the above features and advantages of the present invention more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings for detailed explanation.

[0043] like Figures 1-10 As shown, this embodiment provides an intelligent feeding system for offshore jacket cage aquaculture, including a cage component, a cage lifting component 2, a feed bin 3, a feeding component, a spraying component 6, and a detection component.

[0044] The enclosure lifting assembly 2 drives the enclosure assembly to move up and down. The enclosure assembly includes the enclosure body 1, which is located between four guide frames. The guide frames are the frame 21 of the offshore wind power facility. The enclosure lifting assembly 2 includes four drive groups. Four high-position lifting points are formed at the outer edge of the enclosure body 1, and four low-position lifting points are formed near the middle of the lower surface of the enclosure body 1. The four drive groups are used to drive the four sets of high-position lifting points and low-position lifting points on the same side to rise and fall together.

[0045] Preferably, the enclosure body 1 in this scheme is made of PTFE material. The PTFE is drawn into fibers through a filament-forming process, and the PTFE with a density of 2.1 g / cm³ is made into PTFE monofilaments with a length of 9000m and a mass of 0.05555 g / m (500D) at a standard moisture regain. The monofilaments are twisted into PTFE strands with a diameter of Ф2mm through heat setting and other processes. The PTFE strands are then woven into a net by a knotless warp knitting machine.

[0046] PTFE is drawn into fibers with a density of 2.1 g / cm³ to produce PTFE monofilaments with a length of 9000m and a weight of 0.05555 g / m (500D) at a standard moisture regain. The monofilaments are then twisted into PTFE strands through heat setting and other processes. The PTFE strands are then manufactured into Ф12mm PTFE netting ropes using a rope-making machine. The ropes used for splicing and connecting netting to netting and netting to netting are all made of Ф2mm PTFE strands. Cut the knotless PTFE netting into square netting that meets the design specifications. Each mesh is stitched with Ф2mm PTFE strands to connect the netting perimeter to the bottom. A Ф12mm PTFE rope netting is installed on each of the four sides of the netting bottom and openings, with a rope length of 40.5m (not cut in the middle). Two Ф12mm ×-shaped PTFE rope nettings, each 34.2m long, are added at each diagonal of the bottom of the netting, forming a single, continuous PTFE rope netting with the vertical rope netting at the diagonal. The netting is connected to the bottom of the netting using Ф2mm stranded wire; four Ф12mm vertical PTFE rope nets are set at 2m intervals according to the width of the netting; four Ф12mm horizontal PTFE rope nets are set at 2m intervals according to the height of the netting; the vertical and horizontal nets, the vertical and horizontal nets, the bottom netting, and the top netting are all connected to the netting using Ф2mm PTFE stranded wire; the PE binding ropes are connected to the top netting using a twisting knot or a knotting method to form the main body of the enclosure 1.

[0047] The drive assembly includes a frame 21, a drive body 22, a first twisted rope roller 23, a second twisted rope roller 24, a guide wheel 25, a net opening lifting rope 26, and a net bottom lifting rope 27. The frame 21 is mounted on the guide frame. The drive body 22, the first twisted rope roller 23, and the second twisted rope roller 24 are installed inside the frame 21. The first twisted rope roller 23 and the second twisted rope roller 24 are arranged opposite each other and have a first bevel gear on one side. The output end of the drive body 22 is provided with a second bevel gear, which meshes with the two first bevel gears respectively. The guide wheel 25 is located at the lower end of the guide frame and below the sea surface. One end of the net opening lifting rope 26 is fixed to the circumference of the first twisted rope roller 23, and the other end is fixedly connected to the high lifting point. One end of the net bottom lifting rope 27 is fixedly connected to the second twisted rope roller 24, and the other end passes around the circumference of the guide wheel and is fixedly connected to the low lifting point.

[0048] Preferably, the ratio of the number of teeth of the first bevel gear of the first rope roller 23 and the second rope roller 24 is set according to the length ratio of the net opening lifting rope 26 and the net bottom lifting rope 27.

[0049] Preferably, a torque sensor is provided inside the drive body 22, and the torque sensor is used to obtain the rotational torque of the second bevel gear.

[0050] In this scheme, when the drive body 22 rotates forward, the first rope roller 23 performs a rope winding action, while the second rope roller 24 performs a rope releasing action, as shown in the figure. The main body of the seine net 1 can then move upward and be brought out of the water. When the drive body 22 rotates in reverse, the second rope roller 24 performs a rope releasing action, while the second rope roller 24 performs a rope winding action, and the main body of the seine net 1 can then move downward and sink into the sea.

[0051] The spraying assembly 6 sprays material according to the feeding decision. In this scheme, the spraying assembly 6 is located above the enclosure body 1. The material conveying assembly includes a blower 4 and a discharge pipe 5. The hopper 3 and the discharge pipe 5 are connected through a discharger 31. The spraying assembly 6 includes a rotating ring 61, a swing drive, and a spray gun 64. The discharge pipe 5 and the spray gun 64 are connected through a hose. The rotating ring 61 is located above the enclosure body 1, and the spray gun 64 is located inside the rotating ring 61. The rotating ring 61 is used to drive the spray gun 64 to rotate along the axis of the rotating ring 61. The swing drive is used to drive the spray gun 64 to swing. Specifically, an installation frame is provided on the inward side of the upper end of the guide frame, and an upper... A through mounting hole is provided, and a rotating ring 61 is located inside the mounting hole. A toothed ring 611 is formed on the upper end of the outer circumferential surface of the rotating ring 61. The toothed ring 611 is located above the mounting hole and its diameter is larger than that of the mounting hole. The toothed ring 611 is driven by a gear set, which is driven by a servo motor. A bearing is also provided between the mounting hole and the rotating ring 61. A rotating shaft 62 and a servo drive motor 63 are formed on the inner circumferential surface of the rotating ring 61 and are arranged opposite to each other. An adapter hole is formed on one side of the outer circumferential surface of the spray gun 64. The rotating shaft 62 is inserted into the adapter hole. The output end of the servo drive motor 63 is connected to the outer circumferential surface of the spray gun 64 by screws. The servo drive motor 63 directly drives the spray gun 64 to swing.

[0052] The detection components include multiple underwater cameras, an ammonia nitrogen compound detector, a light intensity detector, a temperature sensor located in the aquaculture area, a dissolved oxygen meter, a pH meter, a communication module, a main control module, and an analysis module. The communication module can use common communication equipment such as wireless communication or cable transmission communication.

[0053] Temperature sensors are used to detect the temperature and temperature changes in the aquaculture area, as well as the sea surface air temperature. Dissolved oxygen meters are used to test the dissolved oxygen content in the water. pH meters are used to test the pH value of the water. Ammonia nitrogen compound detectors are used to detect the ammonia nitrogen compound content in the aquaculture area. Light intensity detectors are used to detect the light intensity on the sea surface. The information acquired by the ammonia nitrogen compound detector, light intensity detector, temperature sensor, dissolved oxygen meter, pH meter, and multiple underwater cameras is sent to the analysis module through the communication module to form aquaculture water environment monitoring data (including aquaculture water data, external environmental monitoring, and fish growth trajectory detection).

[0054] The analysis module makes feeding decisions based on the number and size of the fish in the timed images and past feeding data; the formula for calculating the feeding decision is as follows:

[0055] Wt = e(SGR*Δt + Lnw); where Δt equals the growth cycle, SGR is the specific growth rate, Lnw is the natural logarithm of the initial body weight, and Wt is the predicted target body weight.

[0056] F = Wt * K, where F is the amount of feed required for a single fish and K is the feed conversion coefficient.

[0057] In this embodiment, SGR is 0.015 and K is 0.0262. SGR and K will be revised according to the changes in the aquaculture water environment monitoring data. In the early stage of aquaculture, feed will be provided in a quantitative and fixed-feeding manner. Based on the data collected in the early stage of aquaculture, the initial SGR and K values ​​will be generated. After the initial generation of SGR and K values, the SGR and K values ​​will be revised every three to six months as a cycle.

[0058] In the initial stage of obtaining the initial weight, specific groups of fish of different sizes are photographed and weighed by the fish caught. Multiple sets of photographs are taken for different sizes of fish, no less than two sets, with no less than thirty fish in each set. Then, the average weight is taken. This value is the set weight for the fish species under the condition of that size. This is convenient for the subsequent underwater camera to photograph the fish group. By analyzing the weight of the fish in the module or the image, the weight of the fish in the image is analyzed. The specific fish group in this scheme is the large yellow croaker.

[0059] This embodiment also provides two feeding paths.

[0060] Example 1 of feeding path application:

[0061] like Figure 9 As shown, when the enclosure assembly is underwater, bait spraying rings are set from the inside out with the center point of the enclosure assembly as the center point. The amount of bait sprayed gradually increases as the diameter of the bait spraying rings decreases. The interval between each ring is 1m. The amount of spray required for a single fish is based on the area enclosed by the enclosure body 1. The bait sprayed outside the enclosure body 1 is used to form an odor band to induce the fish to move towards the enclosure body 1.

[0062] Feeding principle: The servo drive motor 63 drives the spray gun 64 to swing, and then the rotating ring 61 drives the circular spraying of bait from the outside to the inside, and the spraying time is constant each time.

[0063] Example 2 of feeding path application

[0064] like Figure 10 As shown, when the enclosure assembly is underwater, a bait spray turbine ring is set with the center point of the enclosure assembly as the starting point. The bait is sprayed along the trajectory of the bait spray turbine ring, and the amount of bait sprayed decreases from the inside to the outside. The amount of spray required for a single fish is based on the area surrounded by the enclosure body 1. The bait sprayed outside the enclosure body 1 is used to form an odor band to induce the fish to move towards the enclosure body 1.

[0065] Feeding principle: Starting from the center of the enclosure net, the turbine-driven bait is launched in cooperation with the servo drive motor 63 and the rotating ring 61.

[0066] This solution also provides a method for detecting attachments to the fence body 1, including the following steps:

[0067] S1. Submerge the unloaded enclosure body 1 underwater. Drive body 22 drives the enclosure body 1 to pull upwards. The upward pull is the distance the enclosure body 1 moves X meters after leaving the water surface. Record the average torque of this X-meter movement. Use the formula: G=T 测 / ηr, G 总 =nG, which gives the weight of the netting body 1 after immersion in water, where G is the mass calculated by a single torque sensor. 总 The weight of the fencing body is 1, T 测 η is the torque, η is the transmission efficiency, and r is the radius of the first rope roller 23 and the second rope roller 24;

[0068] S2. Repeat step S1 every three months to obtain G. 总2 via G 总2 -G 总 Obtain the weight of the attached material;

[0069] S3. When the weight of the attached object reaches the set value, clean or replace the main body of the fence 1.

[0070] Since the weight calculation of the enclosure net body 1 involves the radii of the first rope roller 23 and the second rope roller 24, and the radii of the first rope roller 23 and the second rope roller 24 will change due to rope winding during the rope winding or unwinding process, in order to solve this problem, this solution fixes one end of the net opening lifting rope 26 to the outer end of the first rope roller 23, and the net bottom lifting rope 27 to the outer end of the second rope roller 24. The length of a single loop around the circumference of the first rope roller 23 and the second rope roller 24 around the net opening lifting rope 26 and the net bottom lifting rope 27 is greater than the distance the enclosure net body 1 moves after leaving the water surface, because the net opening lifting rope 26 is located at the outer end of the first rope roller 23, and the net bottom lifting rope 27 is located at the outer end of the second rope roller 24. As shown in the figure, at the outer end of the second rope roller 24, when the rope is being wound up or released, the net opening lifting rope 26 and the net bottom lifting rope 27 will tilt towards the inner side of the first rope roller 23 and the second rope roller 24. This ensures that the net opening lifting rope 26 or the net bottom lifting rope 27 will not overlap during the rope winding process, thus ensuring that the r value will not change during the calculation of the weight of the net body 1. Based on the X value of the rise of the net body 1, the diameter and length of the first rope roller 23 and the second rope roller 24 are set to ensure that the net opening lifting rope 26 and the net bottom lifting rope 27 will not overlap and entangle on the first rope roller 23 and the second rope roller 24, thereby improving the calculation accuracy of the G value.

[0071] The foregoing has shown and described the basic principles and main features of this invention, as well as its advantages. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this invention. Various changes and modifications can be made to this invention without departing from its spirit and scope. All such changes and modifications fall within the scope of this invention as defined by the appended claims and their equivalents.

Claims

1. An intelligent feeding system for offshore jacket net-cage aquaculture, characterized in that: The application relates to a feeding system for a fish cage, which comprises a net assembly, a net lifting assembly, a material bin, a material conveying assembly, a material spraying assembly and a detection assembly. The material bin is connected with the material conveying assembly, and the material conveying assembly is connected with the material spraying assembly. The detection assembly comprises multiple underwater cameras, a communication module, a main control module and an analysis module. The information obtained by the multiple underwater cameras is sent to the analysis module through the communication module to form the monitoring data of the breeding water environment. The number and size of the fish group captured by the underwater camera are sent to the analysis module through the communication module. The analysis module forms a feeding decision according to the number and size of the fish group captured and the previous feeding condition. The material spraying assembly sprays material according to the feeding decision. Wt = e （SGR*△t+Lnw） ; where Δt equals the growth period, SGR is the specific growth rate, Lnw is the natural logarithm of the initial weight, and Wt is the predicted target weight; The feeding decision calculation formula is as follows: F = Wt * K, F is the required feeding amount of a single tail fish, and K is a bait conversion coefficient. The detection assembly further comprises a temperature sensor, a dissolved oxygen tester and a pH value tester located in the breeding area. The temperature sensor is used for detecting the temperature and temperature change of the breeding area. The dissolved oxygen tester is used for testing the dissolved oxygen content of the water body. The pH value tester is used for testing the pH value of the water body.

2. The intelligent feeding system for offshore jacket net mariculture according to claim 1, characterized in that: The information obtained by the temperature sensor, the dissolved oxygen tester, the pH value tester and the multiple underwater cameras is sent to the analysis module through the communication module to form the monitoring data of the breeding water environment. The feeding strategy is formed through the monitoring data of the breeding water environment, and the specific growth rate and the bait conversion coefficient are adjusted according to the monitoring data of the breeding water environment. The material conveying assembly comprises a fan and a discharge pipe. The material bin is connected with the discharge pipe through a discharger. The material spraying assembly comprises a rotating ring, a swing driving element and a spray gun. The discharge pipe is connected with the spray gun through a hose. The rotating ring is located above the net assembly. The spray gun is located inside the rotating ring. The rotating ring is used for driving the spray gun to rotate along the axis of the rotating ring. The swing driving element is used for driving the spray gun to swing. The feeding system provides two feeding paths. When the net assembly is located underwater, a plurality of bait spraying circles are arranged from inside to outside with the center point of the net assembly as the circle point. The bait spraying amount gradually increases as the diameter of the bait spraying circle decreases. When the net assembly is located underwater, a bait spraying turbine circle is arranged with the center point of the net assembly as the circle point. The bait is sprayed along the trajectory of the bait spraying turbine circle, and the bait spraying amount decreases from inside to outside. The net assembly comprises a net body. The net body is located between at least three guide pipe racks. The net lifting assembly comprises at least three driving groups. At least three high lifting points are formed at the outer edge of the net body. At least three low lifting points are formed on the lower surface of the net body close to the middle. The three driving groups are respectively used for driving three groups of high lifting points and low lifting points located on the same side to ascend and descend simultaneously.

3. The intelligent feeding system for offshore jacket net farming according to claim 2, characterized in that: The driving group comprises a driving body, a first rope twisting roller, a second rope twisting roller, a guide wheel, a net mouth lifting rope and a net bottom lifting rope, the driving body, the first rope twisting roller and the second rope twisting roller are arranged on the upper end of the jacket, the first rope twisting roller and the second rope twisting roller are oppositely arranged and are provided with a first bevel gear on the same side, the output end of the driving body is provided with a second bevel gear, the second bevel gear is engaged with the two first bevel gears respectively, the guide wheel is arranged on the lower end of the jacket, one end of the net mouth lifting rope is fixed on the peripheral surface of the first rope twisting roller and the other end is fixedly connected with a high position lifting point, one end of the net bottom lifting rope is fixedly connected with the second rope twisting roller and the other end is fixedly connected with a low position lifting point after winding around the peripheral surface of the guide wheel.

4. The intelligent feeding system for offshore jacket net farming according to claim 3, characterized in that: The driving body is provided with a torque sensor, and the torque sensor is used for acquiring the rotating torque of the second bevel gear.

5. The intelligent feeding system for offshore jacket net farming according to claim 4, characterized in that: The feeding system also provides a way for detecting the attachments of the purse body, comprising the following steps: S1, immerse the empty net body into water, drive the body to drive the net body to pull up, the pulling up stroke is that the net body moves X meters after leaving the water surface, record the average torque of the X meters stroke, through the formula: G=T 测 / ηr, G 总 =nG, obtain the weight of the net body after being immersed in water, wherein G is the mass calculated by the single torque sensor, G 总 is the weight of the net body, T 测 is the torque, η is the transmission efficiency, and r is the radius of the first and second rope rollers. S2, every three months, repeat step S1 to obtain G 总2 , by G 总2 -G 总 obtain the weight of the attachment; S3, when the weight of the attachments reaches a set value, the purse body is cleaned or replaced.

6. The offshore jacketed net-cage intelligent feeding system according to claim 5, characterized in that: One end of the net mouth lifting rope is fixedly connected with the outer end of the first rope twisting roller, and the net bottom lifting rope is fixedly connected with the outer end of the second rope twisting roller, the length of the single circle of the peripheral surface of the first rope twisting roller and the second rope twisting roller around the net mouth lifting rope and the net bottom lifting rope is greater than the moving distance of the purse body after leaving the water surface.

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