Ground-sea transportation method for rainbow trout

Abstract

The invention discloses a rainbow trout land-sea transfer method, and belongs to the technical field of aquaculture. The purpose of scientific and reasonable onshore-sea transportation of rainbow trout is achieved. The rainbow trout land-sea transportation and transfer device is designed and manufactured and loaded on a transportation vehicle, a control system is started to preliminarily debug the rainbow trout land-sea transportation and transfer device, and normal operation of the rainbow trout land-sea transportation and transfer device is ensured; a PID fuzzy control method is constructed, and the temperature, the oxygen amount and the PH value in the rainbow trout land-sea transportation and transfer device are controlled; the transport vehicle goes to a fish loading place to carry out a fish loading process; after the rainbow trout is loaded, the rainbow trout is transported at the land stage, and after the rainbow trout arrives at a transport port, the land-sea transportation and transfer device loaded with the rainbow trout on the transport vehicle is transferred to a transport ship through a loading and unloading device; the control system adopts a PID fuzzy control method to control the temperature, the oxygen amount and the PH value in the rainbow trout land-sea transportation and transfer device in the marine transportation process until the rainbow trout is transported to a destination.

Description

Technical Field

[0001] This invention belongs to the field of aquaculture technology, specifically relating to a method for land-sea transport of rainbow trout. Background Technology

[0002] Rainbow trout (Oncorhynchus mykiss) are native to cold-water rivers and lakes along the Pacific coast of North America. Their natural distribution has been influenced by recent environmental changes, resulting in several subspecies, some of which are now endangered in their native range. Rainbow trout are highly adaptable, able to survive in both freshwater and saltwater environments, with an optimal growth temperature of [missing information - likely a specific temperature range]. As an important salmonid fish, rainbow trout holds a significant position in global aquaculture due to its nutritional value, adaptability, and market potential, and is one of the most widely farmed cold-water economic fish species. Introduced to my country in the late 1950s, it is mainly farmed in cold-water regions of Qinghai, Xinjiang, Northeast China, and Southwest China. Annual rainbow trout production is only around 40,000 tons, far from meeting the domestic market demand of over 140,000 tons annually, indicating a vast potential for development in the salmon and trout farming industry. However, the development of the land-based salmon and trout industry is severely constrained by factors such as cold-water resources and land availability.

[0003] In recent years, with the discovery of cold water masses in my country's nearshore and deep-sea areas, and the gradual improvement of the "land-sea relay aquaculture model" for rainbow trout, the development of my country's deep-sea salmon and trout aquaculture industry has been rapidly promoted. The land-sea relay aquaculture model for rainbow trout involves cultivating large-sized rainbow trout fry in freshwater, acclimatizing them to salinity, and then introducing them into seawater for adult cultivation. For the large-scale production of rainbow trout under this model, the fry, cultivated and acclimatized before being released into the sea, are gradually transferred to the ocean for further cultivation according to the deep-sea aquaculture plan and scale. During this transfer process, a large number of fish suffer damage and mortality. Therefore, how to effectively transfer rainbow trout fry to the sea is a major problem before the trout are released into the ocean and one of the most important links in achieving seamless integration between land-sea relay freshwater and seawater aquaculture.

[0004] Traditional rainbow trout transportation involves catching fish in land-based aquaculture ponds, transporting them directly to onboard containers at sea via live fish transport vehicles, and then transferring them to deep-sea cages or aquaculture vessels. This transfer process includes catching the rainbow trout with nets and deploying nets or pipelines, all of which cause mechanical damage and stress-induced endogenous harm. Furthermore, the fish must be deprived of feed before transfer; this combined stress and lack of feeding weakens their immunity, increasing the risk of exogenous damage and disease infection, severely impacting survival rates and economic benefits in marine aquaculture. With the continuous expansion of rainbow trout aquaculture in seawater and deep-sea areas, the demand for large-sized, domesticated seedlings is increasing, and traditional transportation methods can no longer meet the practical needs. Therefore, finding a scientifically sound and rational land-sea rainbow trout transportation method to replace traditional methods is one of the crucial challenges that urgently needs to be addressed in promoting the large-scale development of rainbow trout land-sea relay aquaculture. Summary of the Invention

[0005] The problem this invention aims to solve is to achieve a scientific and rational land-sea transport of rainbow trout, and proposes a land-sea transport method for rainbow trout.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A method for land-sea transshipment of rainbow trout includes the following steps:

[0008] S1. Design and manufacture land and sea transport transshipment equipment for rainbow trout;

[0009] S2. Load the rainbow trout land-sea transport transfer device manufactured in step S1 onto the transport vehicle. The transport vehicle is equipped with a vacuum fish lifting pump, liquid oxygen tank, oxygen generator, water tank and control system. Start the control system to perform preliminary debugging of the rainbow trout land-sea transport transfer device to ensure that the rainbow trout land-sea transport transfer device is operating normally.

[0010] S3. Construct a PID fuzzy control method to control the temperature, oxygen level, and pH value in the land-sea transport transshipment device for rainbow trout;

[0011] S4. The transport vehicle proceeds to the fish loading location to begin the fish loading process;

[0012] S5. After the fish are loaded, the land-based transportation of rainbow trout begins. During the transportation process, the control system uses PID fuzzy control to control the temperature, oxygen level, and pH value in the land-sea transportation transfer device for rainbow trout until it reaches the transfer port.

[0013] S6. Using loading and unloading equipment, the land-sea transport transshipment device containing rainbow trout on the transport vehicle is transferred to the transport ship. The transport ship is equipped with a liquid oxygen tank, an oxygen generator, a water tank, and a control system. During the sea transport process, the control system uses PID fuzzy control method to control the temperature, oxygen quantity, and pH value in the land-sea transport transshipment device for rainbow trout until the transport reaches its destination.

[0014] Furthermore, the rainbow trout land-sea transport transshipment device in step S1 includes three fish-carrying boxes installed side by side. The fish-carrying boxes have an external insulation layer. A circulating water pump is installed at the bottom of each fish-carrying box. The circulating water pump is connected to a solenoid valve through a pipeline to control the water outlet. An overflow port is provided on the upper side of each fish-carrying box. A temperature sensor, a pH sensor, and a dissolved oxygen sensor are installed below the overflow port. A fish discharge port with an electric valve is installed at the bottom of each fish-carrying box. The bottom of the fish-carrying box has a 6.9-degree slope on both sides in the length direction towards the middle and a 5-degree slope on one end in the width direction towards the fish discharge port. A sewage outlet is provided near the lowest point of the fish discharge port with the electric valve. An observation window and a lifting ring are installed on the top of each fish-carrying box.

[0015] Furthermore, in step S2, the control system is connected to the circulating water pump, solenoid valve, temperature sensor, pH sensor, dissolved oxygen sensor, and fish discharge outlet with electric valve control to ensure the normal operation of the rainbow trout land-sea transportation and transfer device.

[0016] Furthermore, the specific implementation method of constructing the PID fuzzy control method in step S3 includes the following steps:

[0017] S3.1. Set the input and output parameters of the fuzzy PID controller. The input parameter is the error e of the corresponding adjustment parameter. i (t) and the corresponding rate of change of the adjustment parameter error de i (t) / dt, the output parameters are the correction coefficients for the proportional coefficient, integral coefficient and differential coefficient, i=1 or 2 or 3, where 1 represents temperature, 2 represents oxygen quantity and 3 represents pH value.

[0018] S3.2. Genetically encode the membership function and fuzzy rules of the fuzzy PID, and then initialize the genetic encoding;

[0019] S3.3. Select the mathematical model for fuzzy PID;

[0020] S3.4. Formulate genetic algorithm rules, adopt the fitness ratio method and elite strategy combined rules to perform genetic operations, and then generate new individuals based on adaptive crossover and mutation rules; calculate the individual fitness based on the generated new individuals, and then repeat the iteration until the iteration ends. After decoding, the output parameters are obtained to control the temperature, oxygen and pH value in the land and sea transport transshipment device for rainbow trout.

[0021] Furthermore, the correction factors for the proportional coefficient, integral coefficient, and differential coefficient in step S3.1 are as follows: The output parameters optimized by the genetic algorithm are input into the PID controller, which outputs the control variables corresponding to the adjustment parameters, and performs real-time closed-loop control of the adjustment parameters based on the control variables.

[0022] Furthermore, the mathematical model for the fuzzy PID control selected in step S3.3 is as follows:

[0023]

[0024] Where u(t) is the control variable of fuzzy PID control.

[0025] Furthermore, the specific implementation method of step S4 includes the following steps:

[0026] S4.1. At the location where the fish are loaded, fill the fish-carrying box of the rainbow trout land-sea transport transshipment device with 1 / 3 well water and turn on the oxygen generator to increase oxygenation;

[0027] S4.2. Use soft netting to enclose the seedlings that have been cultivated and domesticated before entering the sea in the breeding pond; use a fish pump to automatically lift the high-density rainbow trout in the netting into the fish-carrying box of the rainbow trout land-sea transport transfer device, and let the excess water in the fish-carrying box flow out through the overflow port.

[0028] S4.3. After all the fish tanks are filled with fish, close the overflow valve, change the water, drain the water through the drain outlet of the fish tank, observe the temperature of the water in the fish tank, and add well water to adjust the temperature.

[0029] S4.4. After completing the water change, observe the condition of the rainbow trout in each fish tank, adjust the liquid oxygen supply in the water using an oxygenator to maintain the temperature; turn on the circulating water pump at the bottom of the fish tank to circulate the water and simulate the aquaculture conditions under natural aquaculture conditions; close the observation window of the fish tank to complete the entire fish loading process.

[0030] Furthermore, in step S6, after the transport vehicle arrives at the seaside, the loading and unloading device is used to transfer the land-sea transport transfer device containing rainbow trout from the transport vehicle to the transport ship and place it in the corresponding position, with the fish discharge port facing the direction of the fish receiving port of the net cage or fish farm. After the transfer device is fixed on the ship, the observation window of the fish box is opened to observe the condition of the rainbow trout in each fish box and the oxygen level. The supply of liquid oxygen in the water is adjusted to maintain the temperature of the water in the box. The observation window is then closed, completing the entire process of loading the transfer device onto the ship and starting the sea transport of the rainbow trout.

[0031] After the transport ship arrives at the offshore aquaculture site, the fish discharge port of the land-sea transport and transfer device for rainbow trout on the transport ship is located near the net cages or fish farm vessels. The fish discharge port is connected to the fish transport pipeline via an interface equipped with an electric valve. The connection of the fish transport pipeline is smooth, avoiding mechanical damage during fish transport. When the water level in the fish cages is low, an external water pump continuously replenishes the cages until all the live fish are automatically discharged, completing the unloading process. This completes the entire land-sea transport and transfer process for rainbow trout.

[0032] The beneficial effects of this invention are:

[0033] This invention discloses a land-sea transport system for rainbow trout. The land-sea transport device significantly reduces mechanical and external damage to rainbow trout during net fishing, loading, unloading, and deployment, thus minimizing the risk of disease infection due to external damage. It solves the problems of mechanical damage, stress-induced endogenous damage, and low survival rates associated with traditional rainbow trout transportation methods. The system employs PID fuzzy control to manage temperature, oxygen levels, and pH during transport, addressing the issue of water quality deterioration caused by rainbow trout respiration and excretion, which can lead to stress and physiological changes affecting health and survival rates. This invention improves the economic benefits of rainbow trout farming, promotes the large-scale development of land-sea integrated deep-sea rainbow trout farming, and expands the development space of the salmon and trout industry. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of the rainbow trout land-sea transportation and transshipment device described in this invention;

[0035] Figure 2 This is a flowchart of a land-sea transshipment method for rainbow trout according to the present invention. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described specific embodiments are merely a part of the embodiments of the invention, and not all of them. The components of the specific embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations, and the invention may also have other embodiments.

[0037] Therefore, the following detailed description of specific embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected specific embodiments of the invention. All other specific embodiments obtained by those skilled in the art based on these specific embodiments without inventive effort are within the scope of protection of this invention.

[0038] To further understand the invention's content, features, and effects, the following specific embodiments are provided, along with accompanying drawings. Figure 1 - Appendix Figure 2 Detailed explanation is as follows:

[0039] Example 1:

[0040] A method for land-sea transshipment of rainbow trout includes the following steps:

[0041] S1. Design and manufacture land and sea transport transshipment equipment for rainbow trout;

[0042] Furthermore, the rainbow trout land-sea transport transfer device in step S1 includes three fish-carrying boxes 1 installed side by side. Each fish-carrying box 1 has an external insulation layer 2. A circulating water pump 3 is installed at the bottom of each fish-carrying box 1. The circulating water pump 3 is connected to a solenoid valve 4 via a pipeline to control the water outlet 5. An overflow port 6 is provided on the upper side of each fish-carrying box 1. A temperature sensor 7, a pH sensor 8, and a dissolved oxygen sensor 9 are installed below the overflow port 6. A fish discharge port 10 with an electric valve is installed at the bottom of each fish-carrying box 1. The bottom of each fish-carrying box 1 has a 6.9-degree slope on both sides in the length direction towards the middle and a 5-degree slope on one end in the width direction towards the fish discharge port. A sewage outlet 11 is provided near the lowest point of the fish discharge port 10 with an electric valve. An observation window 12 and a hanging ring 13 are installed on the top of each fish-carrying box 1.

[0043] Furthermore, the rainbow trout land-sea transport transshipment device is in the form of a cuboid, with the body made of 316L stainless steel and dimensions of 6120*2240*2150mm. Internally, it contains three fish-carrying boxes, each with internal dimensions of 2000*2000*1910mm and a capacity of 6.4m³ of effective water.3 The total effective water volume that can be carried is 19.2m. 3 Based on the transportation distance and time, per m 3 The water tank can hold 50-100kg of live fish. The outer layer of the insulation layer is made of high-density insulation material. The material and thickness can be selected according to the transport temperature of the rainbow trout. The insulation layer provides excellent insulation for the internal water, ensuring the safety of the rainbow trout during transport. The fish discharge outlet is equipped with an electric valve that automatically controls the opening and closing of the large-diameter outlet. The outlet measures 200*200mm and connects smoothly to the fish tank / collection trough. It also features an automatic interface switch for the external fish transport pipeline, ensuring a smooth connection and preventing mechanical damage during transport.

[0044] Furthermore, the bottom of the fish tank is sloped, and the drain outlet is located at the lowest point of the fish discharge outlet. When the drain outlet discharges water, the water in the fish tank will automatically gather towards the fish discharge outlet, thus achieving the function of automatic sewage discharge. The bottom of the fish tank is designed with an automatic fish collection slope (fish welfare device). The two sides of the bottom in the length direction have a 6.9% slope towards the middle, and one end in the width direction has a 5% slope towards the fish discharge outlet. When fish are put into the fish tank through the fish discharge outlet, when the water in the tank reaches the bottom 1 / 3 position, the fish density will increase. At this time, the fish will first gather through the two sides of the bottom (2000mm long, 728mm wide, 6.9% slope) towards the fish trough in the middle position (2000mm long, 5% slope, 500mm wide fish collection trough). Through the automatic fish discharge slope at the bottom of the fish tank, the rainbow trout in the fish tank are continuously gathered to the fish discharge outlet. Through the fish transport pipeline, the fish flow with the water into the aquaculture net cage or the aquaculture pond of the aquaculture vessel. When there is not much water in the fish tank, water is continuously added to the tank through an external water pump until all the live fish in the tank are automatically drained.

[0045] S2. Load the rainbow trout land-sea transport transfer device manufactured in step S1 onto the transport vehicle. The transport vehicle is equipped with a vacuum fish lifting pump, liquid oxygen tank, oxygen generator, water tank and control system. Start the control system to perform preliminary debugging of the rainbow trout land-sea transport transfer device to ensure that the rainbow trout land-sea transport transfer device is operating normally.

[0046] Furthermore, in step S2, the control system is connected to the circulating water pump 3, solenoid valve 4, temperature sensor 7, pH sensor 8, dissolved oxygen sensor 9, and fish discharge outlet 10 with electric valve control to ensure the normal operation of the rainbow trout land-sea transportation and transfer device.

[0047] Furthermore, each fish tank is equipped with a circulating water pump at the bottom. The pump circulates the water inside the tank, simulating the aquaculture conditions under natural farming conditions. This reduces adverse reactions caused by transport stress during the fish's journey and also regulates the water quality within the transport tank. When loading live fish into the aquaculture pond, a fish-lifting pump automatically draws the fish from the pond into the transfer device. The fish-lifting pump's transport pipeline connects to the fish discharge port, and an electric valve interface is used for switching. The transport pipeline connection is smooth, avoiding mechanical damage during fish transport. At the same time, it greatly reduces mechanical damage and stress-induced endogenous damage to rainbow trout during netting and pipeline deployment.

[0048] S3. Construct a PID fuzzy control method to control the temperature, oxygen level, and pH value in the land-sea transport transshipment device for rainbow trout;

[0049] The further step S3, which involves constructing the specific implementation method of the PID fuzzy control method, includes the following steps:

[0050] S3.1. Set the input and output parameters of the fuzzy PID controller. The input parameter is the error e of the corresponding adjustment parameter. i (t) and the corresponding rate of change of the adjustment parameter error de i (t) / dt, the output parameters are the correction coefficients for the proportional coefficient, integral coefficient and differential coefficient, i=1 or 2 or 3, where 1 represents temperature, 2 represents oxygen quantity and 3 represents pH value.

[0051] Furthermore, the correction factors for the proportional coefficient, integral coefficient, and differential coefficient in step S3.1 are as follows: The output parameters optimized by the genetic algorithm are input into the PID controller, which outputs the control variables corresponding to the adjustment parameters, and performs real-time closed-loop control of the adjustment parameters based on the control variables.

[0052] S3.2. Genetically encode the membership function and fuzzy rules of the fuzzy PID, and then initialize the genetic encoding;

[0053] Furthermore, the specific implementation method includes the following steps:

[0054] S3.2.1. Membership Function Encoding: A triangular membership function is used, designing each variable to have 7 fuzzy subsets. Before optimization, the 7 subsets are uniformly distributed. The x-coordinate of the vertex is set to... The subset region of the membership function is determined; based on the input having 2 parameters and the output having 3 parameters, each parameter is set to correspond to a set of vertex x-coordinates, resulting in 25 membership function genes to be optimized;

[0055] S3.2.2. Fuzzy Rule Encoding: The fuzzy language is converted into numerical representations. Negative large (NB), negative medium (NM), negative small (NS), zero (ZO), positive small (PS), positive medium (PM), and positive large (PB) are respectively mapped to the numbers 1, 2, 3, 4, 5, 6, and 7. Each corresponds to 49 rules, for a total of 147 rules; the membership function encoding and fuzzy rule encoding are combined to form a genetic code of 172 bits.

[0056] S3.2.3. Genetic code initialization: Randomly select the first 147 genetic codes from integers in [1,7] and the last 25 genetic codes from integers in [-6,6] to complete the genetic code initialization.

[0057] S3.3. Select the mathematical model for fuzzy PID;

[0058] Furthermore, the mathematical model for the fuzzy PID control selected in step S3.3 is as follows:

[0059]

[0060] Where u(t) is the control variable of fuzzy PID control.

[0061] S3.4. Formulate genetic algorithm rules, adopt the fitness ratio method and elite strategy combined rules to perform genetic operations, and then generate new individuals based on adaptive crossover and mutation rules; calculate the individual fitness based on the generated new individuals, and then repeat the iteration until the iteration ends. After decoding, the output parameters are obtained to control the temperature, oxygen and pH value in the land and sea transport transshipment device for rainbow trout.

[0062] Furthermore, the specific implementation method of step S3.4 includes the following steps:

[0063] S3.4.1. The fitness ratio method uses the ratio of individual fitness to the cumulative fitness of the population as the selection rule, stipulating that the top 50% of fitness are inherited into the next generation; the elite strategy selects the top 5% with the highest fitness ratio directly as the next generation.

[0064] S3.4.2. The adaptive crossover method is to set up allele crossover operations for individuals with two chromosomes before and after the crossover; for gene variables with fuzzy rules in positions 1-147, the crossover is allowed if the absolute value of the difference between the gene variables to be crossed is less than or equal to 3, otherwise the crossover is not allowed; for gene variables with membership functions in positions 148-172, allele crossover is performed between groups of 5.

[0065] S3.4.3. The method for setting mutation rules is to determine whether to perform a mutation based on the mutation probability. If a mutation is performed, a gene on the chromosome is randomly selected as the mutation point.

[0066] Furthermore, if the mutation point is located at position 1-147, a random +1 or -1 operation is performed on the mutation position, and the mutated gene variable must be within the fuzzy rule's digitization range [1,7]. If it is less than 1, take 1; if it is greater than 7, take 7. If the mutation point is located at position 148-172, a random +1.5 or -1.5 operation is performed on the mutation position, and the mutated gene variable cannot be less than the previous position or greater than the next position, and the mutated gene variable must be within the fuzzy domain [-6,6].

[0067] S4. The transport vehicle proceeds to the fish loading location to begin the fish loading process;

[0068] Furthermore, the specific implementation method of step S4 includes the following steps:

[0069] S4.1. At the location where the fish are loaded, fill the fish-carrying box of the rainbow trout land-sea transport transshipment device with 1 / 3 well water and turn on the oxygen generator to increase oxygenation;

[0070] S4.2. Use soft netting to enclose the seedlings that have been cultivated and domesticated before entering the sea in the breeding pond; use a fish pump to automatically lift the high-density rainbow trout in the netting into the fish-carrying box of the rainbow trout land-sea transport transfer device, and let the excess water in the fish-carrying box flow out through the overflow port.

[0071] S4.3. After all the fish tanks are filled with fish, close the overflow valve, change the water, drain the water through the drain outlet of the fish tank, observe the temperature of the water in the fish tank, and add well water to adjust the temperature.

[0072] S4.4. After completing the water change, observe the condition of the rainbow trout in each fish tank, adjust the liquid oxygen supply in the water using an oxygenator to maintain the temperature; turn on the circulating water pump at the bottom of the fish tank to circulate the water and simulate the aquaculture conditions under natural aquaculture conditions; close the observation window of the fish tank to complete the entire fish loading process.

[0073] S5. After the fish are loaded, the land-based transportation of rainbow trout begins. During the transportation process, the control system uses PID fuzzy control to control the temperature, oxygen level, and pH value in the land-sea transportation transfer device for rainbow trout until it reaches the transfer port.

[0074] S6. Using loading and unloading equipment, the land-sea transport transshipment device containing rainbow trout on the transport vehicle is transferred to the transport ship. The transport ship is equipped with a liquid oxygen tank, an oxygen generator, a water tank, and a control system. During the sea transport process, the control system uses PID fuzzy control method to control the temperature, oxygen quantity, and pH value in the land-sea transport transshipment device for rainbow trout until the transport reaches its destination.

[0075] Furthermore, in step S6, after the transport vehicle arrives at the seaside, the loading and unloading device is used to transfer the land-sea transport transfer device containing rainbow trout from the transport vehicle to the transport ship and place it in the corresponding position, with the fish discharge port facing the direction of the fish receiving port of the net cage or fish farm. After the transfer device is fixed on the ship, the observation window of the fish box is opened to observe the condition of the rainbow trout in each fish box and the oxygen level. The supply of liquid oxygen in the water is adjusted to maintain the temperature of the water in the box. The observation window is then closed, completing the entire process of loading the transfer device onto the ship and starting the sea transport of the rainbow trout.

[0076] After the transport ship arrives at the offshore aquaculture site, the fish discharge port of the land-sea transport and transfer device for rainbow trout on the transport ship is located near the net cages or fish farm vessels. The fish discharge port is connected to the fish transport pipeline via an interface equipped with an electric valve. The connection of the fish transport pipeline is smooth, avoiding mechanical damage during fish transport. When the water level in the fish cages is low, an external water pump continuously replenishes the cages until all the live fish are automatically discharged, completing the unloading process. This completes the entire land-sea transport and transfer process for rainbow trout.

[0077] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0078] Although this application has been described above with reference to specific embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of this application. In particular, as long as there is no structural conflict, the features in the specific embodiments disclosed in this application can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, this application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A method for land-sea transshipment of rainbow trout, characterized in that, Includes the following steps: S1. Design and manufacture land and sea transport transshipment equipment for rainbow trout; S2. Load the rainbow trout land-sea transport transfer device manufactured in step S1 onto the transport vehicle. The transport vehicle is equipped with a vacuum fish lifting pump, liquid oxygen tank, oxygen generator, water tank and control system. Start the control system to perform preliminary debugging of the rainbow trout land-sea transport transfer device to ensure that the rainbow trout land-sea transport transfer device is operating normally. S3. Construct a PID fuzzy control method to control the temperature, oxygen level, and pH value in the land-sea transport transshipment device for rainbow trout; S4. The transport vehicle proceeds to the fish loading location to begin the fish loading process; S5. After the fish are loaded, the land-based transportation of rainbow trout begins. During the transportation process, the control system uses PID fuzzy control to control the temperature, oxygen level, and pH value in the land-sea transportation transfer device for rainbow trout until it reaches the transfer port. S6. Using loading and unloading equipment, the land-sea transport transshipment device containing rainbow trout on the transport vehicle is transferred to the transport ship. The transport ship is equipped with a liquid oxygen tank, an oxygen generator, a water tank, and a control system. During the sea transport process, the control system uses PID fuzzy control method to control the temperature, oxygen quantity, and pH value in the land-sea transport transshipment device for rainbow trout until the transport reaches its destination.

2. The method for land-sea transshipment of rainbow trout according to claim 1, characterized in that, The rainbow trout land-sea transport transfer device in step S1 includes three parallel fish-carrying boxes (1). Each fish-carrying box (1) has an external insulation layer (2). A circulating water pump (3) is installed at the bottom of each fish-carrying box (1). The circulating water pump (3) is connected to a solenoid valve (4) through a pipeline to control the water outlet (5). An overflow port (6) is provided on the upper side of the fish-carrying box (1). A temperature sensor (7), a pH sensor (8), and a dissolved oxygen sensor (9) are installed below the overflow port (6). A fish discharge port (10) with an electric valve is installed at the bottom of the fish-carrying box (1). The bottom of the fish-carrying box (1) has a 6.9-degree slope on both sides in the length direction towards the middle and a 5-degree slope on one end in the width direction towards the fish discharge port. A sewage outlet (11) is provided near the lowest point of the fish discharge port (10) with an electric valve. An observation window (12) and a hanging ring (13) are installed on the top of the fish-carrying box (1).

3. A method for land-sea transshipment of rainbow trout according to claim 1 or 2, characterized in that, In step S2, the control system is connected to the circulating water pump (3), solenoid valve (4), temperature sensor (7), pH sensor (8), dissolved oxygen sensor (9), and fish discharge outlet (10) with electric valve control to ensure the normal operation of the rainbow trout land and sea transport transfer device.

4. A method for land-sea transshipment of rainbow trout according to claim 3, characterized in that, Step S3, the specific implementation method for constructing the PID fuzzy control method, includes the following steps: S3.

1. Set the input and output parameters of the fuzzy PID controller. The input parameter is the error e of the corresponding adjustment parameter. i (t) and the corresponding rate of change of the adjustment parameter error de i (t) / dt, the output parameters are the correction coefficients for the proportional coefficient, integral coefficient and differential coefficient, i=1 or 2 or 3, where 1 represents temperature, 2 represents oxygen quantity and 3 represents pH value. S3.

2. Genetically encode the membership function and fuzzy rules of the fuzzy PID, and then initialize the genetic encoding; S3.

3. Select the mathematical model for fuzzy PID; S3.

4. Formulate genetic algorithm rules, adopt the fitness ratio method and elite strategy combined rules to perform genetic operations, and then generate new individuals based on adaptive crossover and mutation rules; calculate the individual fitness based on the generated new individuals, and then repeat the iteration until the iteration ends. After decoding, the output parameters are obtained to control the temperature, oxygen and pH value in the land and sea transport transshipment device for rainbow trout.

5. A method for land-sea transshipment of rainbow trout according to claim 4, characterized in that, The correction factors for the proportional coefficient, integral coefficient, and differential coefficient in step S3.1 are as follows: The output parameters optimized by the genetic algorithm are input into the PID controller, which outputs the control variables corresponding to the adjustment parameters, and performs real-time closed-loop control of the adjustment parameters based on the control variables.

6. A method for land-sea transshipment of rainbow trout according to claim 5, characterized in that, The mathematical model for the fuzzy PID control selected in step S3.3 is as follows: Where u(t) is the control variable of fuzzy PID control.

7. A method for land-sea transshipment of rainbow trout according to claim 6, characterized in that, The specific implementation method of step S4 includes the following steps: S4.

1. At the location where the fish are loaded, fill the fish-carrying box of the rainbow trout land-sea transport transshipment device with 1 / 3 well water and turn on the oxygen generator to increase oxygenation; S4.

2. Use soft netting to enclose the seedlings that have been cultivated and domesticated before entering the sea in the breeding pond; use a fish pump to automatically lift the high-density rainbow trout in the netting into the fish-carrying box of the rainbow trout land-sea transport transfer device, and let the excess water in the fish-carrying box flow out through the overflow port. S4.

3. After all the fish tanks are filled with fish, close the overflow valve, change the water, drain the water through the drain outlet of the fish tank, observe the temperature of the water in the fish tank, and add well water to adjust the temperature. S4.

4. After completing the water change, observe the condition of the rainbow trout in each fish tank, adjust the liquid oxygen supply in the water using an oxygenator to maintain the temperature; turn on the circulating water pump at the bottom of the fish tank to circulate the water and simulate the aquaculture conditions under natural aquaculture conditions; close the observation window of the fish tank to complete the entire fish loading process.

8. A method for land-sea transshipment of rainbow trout according to claim 7, characterized in that, In step S6, after the transport vehicle arrives at the seaside, the land-sea transport transfer device containing rainbow trout on the transport vehicle is transferred to the transport ship using the loading and unloading device. The device is placed in the corresponding position, with the fish discharge port facing the direction of the fish receiving port of the net cage or fish farm. After the transfer device is fixed on the ship, the observation window of the fish box is opened to observe the condition of the rainbow trout and the oxygen level in each fish box. The supply of liquid oxygen in the water is adjusted to maintain the temperature of the water in the box. The observation window is then closed, completing the entire process of loading the transfer device onto the ship and starting the sea transport of the rainbow trout. After the transport ship arrives at the offshore aquaculture site, the fish discharge port of the land-sea transport and transfer device for rainbow trout on the transport ship is located near the net cages or fish farm vessels. The fish discharge port is connected to the fish transport pipeline via an interface equipped with an electric valve. The connection of the fish transport pipeline is smooth, avoiding mechanical damage during fish transport. When the water level in the fish cages is low, an external water pump continuously replenishes the cages until all the live fish are automatically discharged, completing the unloading process. This completes the entire land-sea transport and transfer process for rainbow trout.

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