High-mobility epipelagic plankton collecting device and method thereof

Abstract

This invention relates to the field of plankton collection technology, specifically a highly mobile surface plankton collection device and method. The device includes an unmanned surface vessel (USV) with a propeller located at the stern. A sampling device, which rotates downwards from the bottom of the USV, is located on the hull. The sampling device comprises a cylindrical main body with a collection net connected to its rear. A sampling channel is formed between the radially inner side of the main body and the inner area of ​​the collection net. A compression net and a pull rope are located inside the main body. The top of the pull rope extends through the main body into the USV and is connected to a winding device. A slot is provided on the radially inner side of the main body corresponding to the pull rope. After the pull rope is wound up by the winding device, it can extend the compression net and pass through the slot to form a closed sampling structure within the sampling channel. This invention provides a highly mobile surface plankton collection device and method, which helps to solve the problems of poor mobility, inconvenient operation, and unstable sampling accuracy associated with existing methods that rely on fixed-point deployment.

Description

Technical Field

[0001] This invention relates to the field of plankton collection technology, and in particular to a highly mobile surface plankton collection device and method. Background Technology

[0002] Plankton is an important component of the marine environment, possessing advantages such as short growth cycles, sensitivity to environmental changes, and direct observation and identification. Studying plankton population size, dominant species, and spatiotemporal distribution is a crucial aspect of marine ecological environment assessment. Plankton sampling is fundamental to this research, and the primary tool for collecting plankton samples is the plankton net (i.e., plankton collection device), which is widely used in various studies of marine plankton.

[0003] Currently, many phytoplankton collection operations still rely on point-to-point deployment. These collection devices mainly consist of nets, lanyards, and buoys. They are transported by boat to the target location, then manually deployed, and retrieved at regular intervals. This method has several drawbacks, such as poor mobility, requiring a high degree of human intervention, and an inconvenient workflow. Sample collection is also too passive, often requiring passive waiting for phytoplankton to naturally aggregate within the collection area after deployment, leading to many uncontrollable factors and lower data accuracy. Some collection operations use vertical trawls, but their sampling area and volume are limited, affecting sampling accuracy. Summary of the Invention

[0004] This invention provides a highly mobile surface planktonic organism collection device and method, which helps to solve the problems of poor mobility, inconvenient operation, and unstable sampling accuracy of some existing collection methods that rely on fixed-point deployment.

[0005] This invention is implemented as follows:

[0006] A highly mobile surface planktonic sampling device includes an unmanned surface vessel (USV) equipped with a GPS positioning system and a wireless communication system. The USV's propeller is located at the stern, and a sampling device that flips downwards from the bottom of the USV is located on the bottom of the USV. The sampling device includes a cylindrical main body with a sampling net connected to the rear side of the main body. The radially inner side of the main body and the inner area of ​​the sampling net form a sampling channel. The main body has an internal groove arranged around its circumference, and a compression net stacked along the axial direction of the main body is located in the internal groove. A pull rope is wound around the radially outer side of the compression net. The top of the pull rope passes through the main body and extends into the interior of the USV, where it is connected to a winding device. The main body has a slot corresponding to the radially inner side of the pull rope. After the pull rope is wound by the winding device, it can drive the compression net to extend and pass through the slot to form a closed sampling structure within the sampling channel.

[0007] Based on the above technical solution, the bottom of the unmanned surface vessel is provided with a storage slot, in which the sampling device that has not been flipped downwards can be accommodated.

[0008] Based on the above technical solution, the unmanned surface vessel has a guide plate on the front side of the storage tank at the bottom of the vessel, and the guide plate is an inclined boss structure with a higher front and a lower rear.

[0009] Based on the above technical solution, a vortex component is provided on the radial inner side of the main body along the path of the sampling channel. The vortex component is a cylindrical structure with several spiral blades on its inner wall. When water flows through the inner side of the vortex component, it will be transformed into a vortex structure.

[0010] Based on the above technical solution, the radially outer end of the vortex component is provided with a bearing, the radially outer end of the bearing is connected and fixed to the inner side wall of the main body, and the radially inner end of the vortex component forms a rotating body with several helical blades. This rotating body can rotate relative to the main body around the axial center line of the sampling channel.

[0011] Based on the above technical solution, the top of the sampling device is connected to a tilting device located on the unmanned surface vessel. The tilting device includes a tilting motor, which can control the tilting activity of the sampling device.

[0012] Based on the above technical solution, the collection net has a conical structure that is wider at the front and narrower at the back.

[0013] Based on the above technical solution, the front end of the collection network is provided with a support, which consists of two frames that are radially spaced outwards and connected by several support beams. The rear sides of the two frames are respectively connected to an inner net and an outer net that are radially distributed outwards and inwards, and the rear end of the outer net is connected to the outer tail of the inner net.

[0014] Based on the above technical solution, the inner network is provided with several partition nets distributed at intervals in the radial direction. The partition nets are annular mesh structures parallel to the radial direction of the sampling channel.

[0015] A highly mobile planktonic sampling method employs any of the aforementioned highly mobile surface planktonic sampling devices. This highly mobile planktonic sampling method includes: collecting sampling area information; homogenizing and zoning the sampling area; determining the sampling path; and collecting samples. During sample collection, the unmanned surface vessel (USV), driven by a propeller, flips the sampling device downwards at the initial position of the sampling path, with the main body's axis horizontal. The USV then travels along the sampling path at a threshold speed. During this process, the propeller acts as an assist structure for water flow in the sampling channel. After completing the sampling path, a winding device drives the pull rope and compression net to form a closed structure of the sampling channel. Subsequently, the USV carries the samples back to the target location.

[0016] Compared with the prior art, the present invention has at least the following advantages:

[0017] 1. This invention cleverly combines a sampling device with an unmanned surface vessel (USV). The USV's propellers not only provide driving force for the sampling path but also serve as an auxiliary structure for the sampling channel, helping to efficiently and stably collect plankton. Sampling can be remotely controlled and completed autonomously, greatly reducing human intervention in the sampling process. Furthermore, the proactive and dynamic sampling operation further improves sampling accuracy and stability, reducing interference from various uncontrollable factors in the environment. By setting the main body at the front of the collection net and incorporating a controllable closed structure within the main body, post-collection packaging is facilitated, reducing the impact of errors on the sampling results during the USV's return journey.

[0018] 2. This invention can be applied to shallow or deep water areas. In shallow water areas, research vessels are prone to running aground, and the sampling device of this invention can be used for sampling. In deep water areas, the device of this invention is more mobile and flexible. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a highly mobile plankton collection device in one embodiment;

[0021] Figure 2 for Figure 1 A schematic diagram of the sampling device;

[0022] Figure 3 for Figure 2 A schematic diagram of the internal structure of the main body;

[0023] Figure 4 This is a schematic diagram of the sampling channel closure process in one embodiment;

[0024] Figure 5 This is a schematic diagram showing the installation position of the eddy current element in another embodiment;

[0025] Figure 6 This is a three-dimensional structural schematic diagram of the eddy current component in one embodiment;

[0026] Figure 7 This is a schematic diagram of the flipping device in one embodiment;

[0027] Figure 8This is a schematic diagram of the data acquisition network in one embodiment;

[0028] Figure 9 for Figure 8 A schematic diagram of the three-dimensional structure of the data acquisition network;

[0029] Figure 10 This is a schematic diagram of the sampling path for a data acquisition method in one embodiment.

[0030] The diagram is labeled as follows: 100, Unmanned Surface Vessel; 101, Power Propeller; 102, Storage Tank; 103, Deflector Plate; 200, Sampling Device; 300, Tilting Device; 1, Main Body; 11, Internal Slot; 12, Compression Net; 13, Pull Rope; 131, Return Spring; 14, Slot; 2, Collection Net; 21, Support; 22, Outer Net; 23, Inner Net; 24, Partition Net; 3, Winding Device; 4, Vortex Component; 41, Spiral Blade; 42, Bearing; 5, Tilting Motor; 51, Motor Base; 52, Rotating Shaft; 53, Support Frame; 54, Swing Arm; a, Sampling Channel. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0032] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0035] Example 1: Combination Figure 1-4 This embodiment discloses a highly mobile surface plankton collection device for actively collecting plankton from target marine areas.

[0036] The data acquisition device includes an unmanned surface vessel 100 equipped with a GPS positioning system and a wireless communication system. This is existing technology, and its specific structure and working principle will not be described in detail here. Those skilled in the art can select and implement it from existing technologies according to actual operating conditions.

[0037] like Figure 1 As shown, the propeller 101 of the unmanned surface vessel 100 is located at the stern. The propeller 101 is connected to a drive motor. When working, the propeller 101 rotates at high speed to provide driving power for the unmanned surface vessel 100.

[0038] The unmanned surface vessel 100 is equipped with a sampling device 200 that flips downwards from the bottom of the vessel. The sampling device 200 includes a cylindrical main body 1, and a collection net 2 is connected to the rear side of the main body 1. The radial inner side of the main body 1 and the inner area of ​​the collection net 2 form a sampling channel a. When the unmanned surface vessel 100 travels along a specific path, the plankton in the sampling channel a will pass through the main body 1 and be collected in the collection net 2.

[0039] Furthermore, the unmanned surface vessel 100 is provided with a storage slot 102 at the bottom of the vessel. The sampling device 200 that is not flipped downwards can be accommodated in the storage slot 102. When stored, the collection net 2 is folded in an orderly manner and locked inside the main body 1. After flipping, the main body 1 is set so that the axis of the main body 1 is horizontal. As the movement begins, the collection net 2 will be pulled open and present a backward extension posture.

[0040] The unmanned surface vessel 100 has a guide plate 103 located on the front side of the receiving trough 102 at its bottom. The guide plate 103 is an inclined boss structure with a higher front and lower rear. This causes a backflow to form in the area behind the guide plate 103 when the unmanned surface vessel 100 is moving before data collection, thereby reducing the water flow impact in the receiving trough 102 area. This helps protect the collection net 2 from premature detachment. In other embodiments, an opening and closing plate structure can also be provided at the opening of the receiving trough 102 to further protect the sampling device 200 in the stored state.

[0041] Combination Figure 2 As shown, the collection net 2 is a conical structure that is wider at the front and narrower at the back, with the mesh size being the same at both ends. Before actual use, different mesh sizes of collection net 2 should be selected according to the size of the target object to be collected, based on the relevant standards in GB / T12763.6-2007.

[0042] Furthermore, in combination Figure 3 and Figure 4 The main body 1 has an internal groove 11 arranged circumferentially inside. Within the internal groove 11 are compressed meshes 12 stacked along the axial direction of the main body 1. It should be noted that the internal groove 11 has a certain width along the axial direction of the main body 1, sufficient to accommodate a sufficient amount of compressed meshes 12, allowing the compressed meshes 12 to form a complete closed mesh structure after extending inwards. A pull rope 13 is wound radially outwards around the compressed mesh 12. The top of the pull rope 13 passes through the main body 1 and extends into the unmanned surface vessel 100, connecting to a winding device 3. The winding device 3 specifically uses a motor and a winding roller, which is connected to the end of the pull rope 13. The winding device 3 can wind up the pull rope 13, shortening its length. The main body 1 has a slot 14 corresponding to the radial inner side of the pull rope 13. The slot 14 is narrower on the inner side and wider on the outer side, meaning it has a wider opening near the internal groove 11. When the pull rope 13 is embedded in the slot 14, it can... When properly clamped and fixed, the pull rope 13 is wound up by the winding device 3. As the pull rope 13 on one side shortens, it is squeezed and passes inward through the slot 14, eventually forming a gradually shrinking ring shape. During this process, the compression net 12 can be extended and pass through the slot 14 to form a sampling closed structure in the sampling channel a. The purpose of this action is to promptly encapsulate the collected sample after sampling, so that the sampling net 2 will not be affected by the error interference of the sampling structure due to the return of the unmanned vessel 100 while it is still in the water environment.

[0043] It should be noted that a return spring 131 is also fitted on the pull rope 13 in the outer area of ​​the main body 1. One telescopic end of the return spring 131 is fixedly connected to the pull rope 13, and the other telescopic end abuts against the outer wall of the main body 1. When the winding device 3 winds up the pull rope 13, the return spring 131 is stretched. When it is necessary to open the above-mentioned closed structure, the winding control of the winding device 3 on the pull rope 13 is disconnected. The return spring 131 can extend and reset a part of the structure of the pull rope 13 in the inner area of ​​the main body 1 by utilizing its own elasticity, so that the closed opening is loosened. Then it is convenient for the operator to transfer the sample. Before the next sampling cycle begins, the net 12 needs to be manually compressed as a whole so that it is stored in the built-in groove 11, and the pull rope 13 is squeezed and embedded into the inner side of the slot 14.

[0044] Furthermore, in combination Figure 7The top of the sampling device 200 is connected to the flipping device 300 located on the unmanned surface vessel 100. The flipping device 300 is installed inside the unmanned surface vessel 100 and is equipped with a corresponding waterproof sealing structure. The flipping device 300 includes a flipping motor 5, which is connected to the unmanned surface vessel 100 through a motor base 51. The output end of the flipping motor 5 is connected to a reducer and an indexing plate, which can accurately control the rotation at a specific angle. The output end is connected to a rotating shaft 52 through a universal joint. The rotating shaft 52 is pivotally connected to the internal structure of the unmanned surface vessel 100 through a support frame 53 for structural stability control. The output end of the rotating shaft 52 is connected to a swing arm 54, which extends into the storage slot 102 and is connected and fixed to the main body 1, thereby forming a complete flipping control system to control the flipping activity of the sampling device 200. The sampling device 200 can only be extended after reaching the sampling position, reducing the possibility of accidental sample collection while traveling in non-target areas, thereby improving sampling accuracy.

[0045] Example 2: Based on Example 1, combined with Figure 5 and Figure 6 As shown in this embodiment, in order to improve the sampling effect, a vortex component 4 is provided on the radial inner side of the main body 1 along the path of the sampling channel a. The vortex component 4 is a cylindrical structure, and several spiral blades 41 symmetrically arranged around its axial center line are provided on its inner wall. The spiral blades 41 can form a water flow guiding structure. When the water flows through the inner side of the vortex component 4, it will be transformed into a vortex structure. This way, when the water in the sampling channel a passes through the main body 1, it can be transformed into a more powerful vortex. The plankton carried in the water can be more easily brought into the collection net 2. In addition, the vortex will provide a converging effect on the water towards the axial center. This converging effect can make the plankton actively gathered when entering the opening area of ​​the collection net 2, reducing the possible escape of some plankton, thereby improving the sampling accuracy. The sampling results can more accurately reflect the plankton situation under natural conditions in the sampling area.

[0046] Furthermore, the outer radial end of the vortex component 4 is provided with a bearing 42, the outer radial end of the bearing 42 is connected and fixed to the inner side wall of the main body 1, and the inner radial end of the vortex component 4 forms a rotating body with several helical blades 41. The rotating body can rotate relative to the main body 1 around the axial center line of the sampling channel a. The presence of the rotating body can ensure the stable formation of the vortex.

[0047] It should be noted that, since the bottom of the unmanned surface vessel 100 is also equipped with a flow guide plate 103 in front of the sampling device 200, in actual operation, by controlling an appropriate sampling speed, the flow guide plate 103 will pre-guide the water in the sampling path, forming a schematic backflow low-pressure area in the inlet area of ​​the collection net 2. In conjunction with the active drive of the rear propeller 101, it drives the flow of water in front of it. Combined with the influence of eddy currents, the water carrying plankton will first be subjected to the slow flow and backflow stirring caused by the flow guide plate 103 during the sampling process. The plankton carried in the water will be in a relatively uniform distribution state. Then, after the confluence and acceleration of the eddy currents and the flow velocity assistance provided by the rear propeller 101, the plankton can follow the water in the sampling channel a into the collection net 2 efficiently and stably. Subsequently, the water overflows through the collection net 2, and the plankton is collected in the collection net 2.

[0048] Example 3: Based on Example 2, combined with Figure 8 and Figure 9 In this embodiment, the front end of the collection net 2 is provided with a support 21. The support 21 is made of rigid metal and mainly serves as a shaping and support. The support 21 consists of two frames that are radially spaced outwards and connected by several support beams. The rear sides of the two frames are respectively connected to an inner net 23 and an outer net 22 that are radially distributed outwards and inwards. The rear end of the outer net 22 is connected to the outer tail of the inner net 23. This structure creates two collection spaces inside the collection net 2. It should be noted that the opening size of these two collection spaces is adapted to the operation of the eddy current fluid, which can collect the water in front. Due to the influence of the flow, smaller plankton are more affected during the confluence process and tend to concentrate in the axial central area of ​​sampling channel a. Larger plankton are less affected by the eddies or, due to the limited confluence path, tend to gather more around the outer edge of the axial center of sampling channel a. In other words, plankton will be stratified to some extent due to differences in mass. Correspondingly, the inner and outer collection spaces are used for classified collection, which makes the collection of plankton more orderly and controllable, and the subsequent sample collection and analysis operations more convenient and efficient.

[0049] Furthermore, the inner mesh 23 is provided with a plurality of partition meshes 24 spaced apart in the radial direction. The partition meshes 24 are annular mesh structures parallel to the radial direction of the sampling channel a. The function of the partition meshes 24 is to further screen the plankton in the inner sampling space. The relatively lighter samples will be collected in the relatively rear area. In addition, another function of the partition meshes 24 is to prevent the plankton inside from overflowing backward, which is beneficial to improving the sampling effect and sampling quality.

[0050] Example 4: A highly mobile planktonic sampling method, using the highly mobile planktonic sampling device in Example 1. This highly mobile planktonic sampling method includes: collecting sampling area information; homogenizing and partitioning the sampling area; determining the sampling path; and collecting samples.

[0051] Combination Figure 10 , Figure 10 The outer rectangular dashed box represents the target sampling area, the star-shaped points inside represent the sampling partition centers, and the spiral lines represent the sampling paths for each partition.

[0052] In the specific implementation process, staff used a vessel equipped with sample analysis instruments to carry an unmanned surface vessel (USV) 100 to the vicinity of the target sampling area. First, "sampling area information collection" was conducted, such as using drones for image acquisition, ultrasonic detection equipment for biosignal collection, and measuring water flow direction and velocity. These are existing technologies, and their specific structures and working principles will not be elaborated here. Those skilled in the art can select and implement existing technologies based on actual operational conditions. Subsequently, statistical analysis was performed on the collected information to obtain reference data for the sampling zones.

[0053] Subsequently, "sampling area homogenization and zoning" is performed. In this implementation, the target area is divided into grid-like partitions, and the sampling partition centers are determined based on the aforementioned reference data, such as... Figure 10 Five sampling zone centers were identified to balance the number of grids and the number of centers.

[0054] The next step is to "formulate the sampling path". Based on the location distribution of the sampling zone center, a suitable driving path is formulated, as well as a targeted sampling path for each center point. The figure illustrates this by taking the plankton in the central area of ​​the sampling zone as a circular community as an example. A spiral sampling path is specifically set, and the connecting routes between each sampling path are not shown in the figure.

[0055] Then, "sample collection" is carried out. During sample collection, the unmanned surface vessel 100 is driven by the propeller 101 and flips the sampling device 200 downward at the initial position of the sampling path. The axis of the main body 1 is horizontal. The unmanned surface vessel 100 then travels along the sampling path at a threshold speed. During this process, the propeller 101 constitutes an assist structure for the flow of water in the sampling channel a. After the sampling path is completed, the winding device 3 drives the pulling rope 13 and the compression net 12 to move, forming a closed structure of the sampling channel a. Then, the unmanned surface vessel 100 carries the sample back to the target position.

[0056] The detection of plankton is of great significance. Plankton is an important component of aquatic ecosystems such as oceans, lakes, and rivers. As the foundation of the food chain, they directly affect the population dynamics and survival status of upper trophic levels (such as fish and birds). By detecting the species, quantity, distribution, and community structure of plankton, the health status of aquatic ecosystems can be assessed, abnormal changes in ecosystems can be detected in a timely manner, and a scientific basis can be provided for ecological protection and management.

[0057] Plankton are highly sensitive to changes in water quality; variations in their species and abundance can reflect the nutrient status, pollution levels, and ecological restoration of a water body. For example, the proliferation of cyanobacteria is often associated with eutrophication, while the disappearance of certain sensitive species may indicate water quality deterioration. Therefore, plankton detection is one of the important methods for water quality monitoring.

[0058] Plankton is a food source for many fish and other aquatic organisms, and its quantity and quality directly affect the abundance and quality of fishery resources. By detecting changes in plankton community structure and quantity, the potential of fishery resources can be assessed, providing data support for fishery management and resource conservation.

[0059] As sensitive organisms in aquatic ecosystems, plankton's species and abundance are also affected by climate change. Long-term monitoring of plankton trends can reveal the mechanisms by which climate change impacts aquatic ecosystems, providing a scientific basis for addressing climate change.

[0060] Plankton are an important component of biodiversity, playing an irreplaceable role in aquatic ecosystems. By detecting plankton diversity, we can understand the richness and distribution of species in aquatic ecosystems, providing important information for biodiversity conservation and ecological restoration.

[0061] In certain situations, such as chemical spills and oil spills, plankton can serve as bioindicators to assess environmental risks. By detecting changes in the species, quantity, and physiological state of plankton, the potential impact of pollutants on aquatic ecosystems can be assessed, providing important references for environmental risk assessment and emergency response.

[0062] In summary, plankton detection is of great significance in ecosystem health assessment, water quality monitoring, fishery resource assessment, climate change research, biodiversity conservation, and environmental risk assessment.

[0063] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A highly mobile surface plankton collection device, comprising an unmanned surface vessel (100) equipped with a GPS positioning system and a wireless communication system, characterized in that, The unmanned surface vessel (100) has a propeller (101) located at the stern. The bottom of the unmanned surface vessel (100) is equipped with a sampling device (200) that flips downwards from the bottom. The sampling device (200) includes a cylindrical main body (1), with a collection net (2) connected to the rear side of the main body (1). The radially inner side of the main body (1) and the inner area of ​​the collection net (2) form a sampling channel (a). The main body (1) has an internal groove (11) arranged circumferentially within it. The internal groove (11) contains a sampling channel along the circumference of the main body. (1) A compression net (12) is stacked axially. A pull rope (13) is wrapped around the outer side of the compression net (12). The top of the pull rope (13) passes through the main body (1) and extends to the inside of the unmanned boat (100) and is connected to a winding device (3). The main body (1) is provided with a slot (14) on the inner side of the pull rope (13). After the pull rope (13) is wound by the winding device (3), it can drive the compression net (12) to extend and pass through the slot (14) to form a sampling closed structure in the sampling channel (a). The unmanned surface vessel (100) has a storage slot (102) on its bottom, and the sampling device (200) that is not flipped downwards can be accommodated in the storage slot (102); The unmanned surface vessel (100) has a guide plate (103) on the bottom of the vessel in front of the storage tank (102). The guide plate (103) is an inclined boss structure with a higher front and a lower rear. The main body (1) is provided with a vortex component (4) on the radial inner side of the sampling channel (a). The vortex component (4) is a cylindrical structure with several spiral blades (41) on its inner wall. When the water flows through the inner side of the vortex component (4), it will be transformed into a vortex structure. The radial outer end of the vortex component (4) is provided with a bearing (42), the radial outer end of the bearing (42) is connected and fixed to the inner wall of the main body (1), and the radial inner end of the vortex component (4) forms a rotating body with several helical blades (41), which can rotate relative to the main body (1) around the axial center line of the sampling channel (a).

2. The highly mobile surface plankton collection device according to claim 1, characterized in that, The top of the sampling device (200) is connected to a flipping device (300) located on the unmanned surface vessel (100). The flipping device (300) includes a flipping motor (5) which can control the flipping activity of the sampling device (200).

3. The highly mobile surface plankton collection device according to claim 1, characterized in that, The collection net (2) has a conical structure that is wider at the front and narrower at the back.

4. The highly mobile surface plankton collection device according to claim 3, characterized in that, The front end of the collection net (2) is provided with a support (21). The support (21) consists of two frames that are radially spaced outwards and are connected by several support beams. The rear sides of the two frames are respectively connected to an inner net (23) and an outer net (22) that are radially spaced outwards and are connected inwards and outwards. The rear end of the outer net (22) is connected to the outer tail of the inner net (23).

5. The highly mobile surface plankton collection device according to claim 4, characterized in that, The inner mesh (23) has several partition meshes (24) arranged at intervals in the radial direction. The partition meshes (24) are annular mesh structures parallel to the radial direction of the sampling channel (a).

6. A highly mobile plankton sampling method, employing the highly mobile surface plankton collection device according to any one of claims 1-5, characterized in that, This highly mobile planktonic sampling method includes: collecting sampling area information; homogenizing and zoning the sampling area; determining the sampling path and collecting samples; During sample collection, the unmanned surface vessel (100) is driven by a propeller (101) and flips the sampling device (200) downward at the initial position of the sampling path. The axis of the main body (1) is horizontal. The unmanned surface vessel (100) then travels along the sampling path at a threshold speed. During this process, the propeller (101) forms an assist structure for the flow of water in the sampling channel (a). After the sampling path is completed, the winding device (3) drives the pulling rope (13) and the compression net (12) to move, forming a closed structure of the sampling channel (a). Then the unmanned surface vessel (100) carries the sample back to the target position.

Images