A collection device for monitoring fish community based on environmental DNA technology

Abstract

The present application relates to the technical field of robots, and especially relates to a collection device for monitoring fish community based on environmental DNA technology, which comprises a sampling device and a sample collecting device, liquid samples are sucked through the sampling device, the liquid samples are stored in the sample collecting device after being delivered, the floating and sinking state of the collection device is controlled through the floating device, so that the collection device is suspended in water, the expansion state of the collection device is controlled through the shape adjusting device, the suspension height of the collection device in water is adjusted, and the screw propeller assembly is arranged on both sides of the shape adjusting device, the movement of the collection device in water is controlled through the cooperation of the screw propeller assembly and the shape adjusting device. The device can make the whole collection device float on the water surface, sample the water area at the surface shallow position of the water body, and also control the floating and sinking state of the whole collection device, so that the collection device is suspended at different heights in water, sampling in multiple positions and multiple aspects is facilitated, and the diversity of sampling is increased.

Description

Technical Field

[0001] This invention relates to the field of robotics, and in particular to a collection device for monitoring fish communities based on environmental DNA technology. Background Technology

[0002] Effective monitoring of fish diversity is crucial for implementing sustainable fisheries management and assessing the impacts of commercial fishing and climate change on fish populations. However, current methods such as bait-based camera trapping, trawling surveys, and acoustic monitoring have significant limitations, and their detection capabilities are often insufficient in the vast marine environment. In contrast, environmental DNA (eDNA) technology, by detecting the genetic material contained in biological materials such as skin cells and mucus shed by fish during natural activity in water bodies, can more accurately reflect the fish composition of specific habitats. This innovative approach provides a new technological pathway for marine biodiversity research.

[0003] Currently, sampling requires personnel to navigate a boat into the relevant waters, attach the sampler to a tow rope, and then place it in the water. This sampling process is cumbersome and inconvenient for centralized sampling of large areas of water, resulting in poor overall intelligence. Summary of the Invention

[0004] The main objective of this invention is to overcome the shortcomings of the prior art and provide a collection device for monitoring fish communities based on environmental DNA technology.

[0005] The technical solution adopted by the present invention to achieve its technical objective is: a collection device for monitoring fish communities based on environmental DNA technology, comprising a sampling device and a receiving device, wherein the sampling device and the receiving device are submerged in water, the sampling device draws liquid samples, and the liquid samples are transported and stored in the receiving device.

[0006] Above the sampling device and the receiving device, there is a shape adjustment device and a float device. The float device controls the floating and sinking state of the collection device so that the collection device is suspended in the water. The shape adjustment device controls the unfolding state of the collection device and adjusts the suspension height of the collection device in the water.

[0007] The shape adjustment device is equipped with propeller assemblies on both sides. The propeller assemblies and the shape adjustment device work together to control the movement of the collection device in the water. The propeller assemblies can be driven on one side of the shape adjustment device to turn, or the propeller assemblies on both sides of the shape adjustment device can be driven synchronously to move the collection device in a straight line in the water.

[0008] Preferably, the sampling device includes a sampling box, a sampling motor, an outer tube, an arc-shaped baffle, a sampling head, an inner tube, a connecting tube, a sampling tube, an outer bevel gear, an inner bevel gear, and a first drive gear;

[0009] The collection box is rotatably connected to an outer bevel gear and an inner bevel gear. The first drive gear meshes with both the outer bevel gear and the inner bevel gear, and drives the outer bevel gear and the inner bevel gear to rotate in both directions.

[0010] A data acquisition motor is fixedly connected to one side of the first drive gear. The data acquisition motor is fixedly installed on the side wall of the data acquisition box, and its drive shaft is fixedly connected to the first drive gear. The data acquisition motor is configured as a reciprocating motor, which drives the first drive gear to rotate reciprocally.

[0011] One end of the outer tube passes through the collection box and is fixedly connected to the outer bevel gear, while the other end is fixedly connected to a baffle.

[0012] The inner tube is located inside the outer tube, and one end of it passes through the collection box, the outer bevel gear is fixedly connected to the inner bevel gear, and the other end is fixedly connected to the collection head with a spherical structure.

[0013] The receiving tube is located inside the inner tube, with one end extending out of the inner tube and connecting to the sample receiving device in the collection box, and the other end passing through the collection head and fixedly connected to the collection tube, with one end of the collection tube fitting into the inside of the collection head.

[0014] Preferably, the acquisition tube is configured as a symmetrical "V" shaped structure, with the acquisition end of the acquisition tube fitting inside the acquisition head and flush with the outer wall of the acquisition head.

[0015] Preferably, the baffle is configured as an arc-shaped structure and fits snugly against the outer wall of the acquisition head, with both ends of the baffle blocking the acquisition end of the acquisition tube.

[0016] Preferably, the sample collection device includes a sample collection bottle, a sample collection solenoid valve, a main connecting pipe, a delivery pump, and a bottle stopper;

[0017] The sample collection bottle is fixedly installed on the top of the collection box. One end of the sample collection bottle is fixedly connected to the sample collection solenoid valve through a branch pipe, and the other end is threadedly fixed with a bottle stopper. One end of the sample collection solenoid valve is fixedly connected to a main connecting pipe, and the main connecting pipe is fixedly connected to the water outlet of the delivery pump.

[0018] One end of the receiving pipe passes through the inner pipe and is fixedly connected to the water inlet of the delivery pump inside the collection box.

[0019] The delivery pump is fixedly installed on the other side wall of the collection box, opposite to the collection motor. The opposite arrangement of the delivery pump and the collection motor can balance the weight on both sides of the collection box, so that the collection box remains in a balanced state.

[0020] Preferably, the sample collection bottle is composed of multiple independent collection bottles fixed side by side;

[0021] The sample collection solenoid valve includes a hollow plate, a solenoid valve, a main connection port, and a branch connection port. The number of solenoid valves and branch connection ports corresponds to the number of collection bottles, and each solenoid valve can independently control the collection bottle.

[0022] The main connecting pipe is fixedly connected to the interior of the hollow plate through the main connecting port.

[0023] Preferably, the shape adjustment device includes an electrically controlled telescopic rod and a housing;

[0024] The box body has concave shells on both sides, and a chain is provided inside the concave shell. The two ends of the chain are connected and spread apart by a driving toothed column and a driven toothed column, respectively. The two ends of the driving toothed column and the driven toothed column are rotatably connected inside the concave shell.

[0025] A driven gear is fixedly sleeved on the outer wall of the middle end of the active toothed column. A second drive gear is meshed with one side of the driven gear. A transmission rod is fixedly connected to one side of the second drive gear. The transmission rod is connected to the concave housing through a fixed plate, and a drive rod is driven to one end of the transmission rod. One end of the drive rod passes through the concave housing and is fixedly connected to a motor. The motor is fixedly installed on the concave housing and drives the drive rod through the motor.

[0026] The fixed plate and the transmission rod are rotatably connected, and the fixed plate restricts the position of the transmission rod.

[0027] A pry bar is fixedly connected to one end of the motor. The pry bar passes through the housing and is rotatably connected inside the housing via a support shaft.

[0028] The side wall of the box has a through groove to allow a pry bar to pass through the box.

[0029] A bearing is fixedly sleeved at one end of the pry bar, and connecting plates are hinged to both sides of the bearing via a rotating shaft; the bearing and connecting plates facilitate the rotation of one end of the pry bar based on the support shaft as the fulcrum.

[0030] The telescopic rod is fixedly installed on the box body, and the movable end of the telescopic rod passes through the box body and is fixedly connected to the top of the connecting plate. The telescopic rod drives the connecting plate to move up and down.

[0031] The motor is covered with a flexible tube, and the two ends of the flexible tube are fixedly connected to the concave housing and the box body, respectively.

[0032] Preferably, the propeller assembly includes a propeller, a core rod, a wide-body gear, and a bridging rod;

[0033] The chain belt is also internally connected to a wide-body gear, and a core rod is fixedly inserted through the inside of the wide-body gear. The two ends of the core rod are rotatably connected to the inner sidewall of the concave shell, while the middle end of the core rod is fixedly connected to the inner top wall of the concave shell through a bridging rod.

[0034] One end of the mandrel is fixedly connected to a propeller through the side wall of the concave shell. The propeller rotates by driving a wide gear through a chain belt, which in turn causes the mandrel to rotate and the propeller to rotate.

[0035] Preferably, the float device includes a sliding sleeve, a T-shaped rod, a spring, an air bladder, an air tube, an air valve solenoid valve, an air disc, and an air pump;

[0036] The air plate and the sliding sleeve are fixedly installed on the concave housing. The sliding sleeve is configured as a bent structure. A T-shaped rod is slidably connected inside the vertical part of the sliding sleeve. A spring is provided between the T-shaped rod and the sliding sleeve for elastic connection. An air bag is fixedly connected to the bottom of its flat part. The spring is sleeved on the outside of the sliding sleeve and the T-shaped rod. One end of the spring is located at the bend of the sliding sleeve, and the other end is fixedly connected to the flat part of the T-shaped rod.

[0037] The combination structure of the sliding sleeve, T-shaped rod, spring and airbag is provided in multiple sets and is distributed in a ring array around the air plate;

[0038] The air pump is fixedly installed inside the air plate, and it is connected to multiple air pipes through branch joints. One end of each air pipe passes through the horizontal part of the sliding sleeve, the vertical part of the sliding sleeve, and the inside of the T-shaped rod in sequence to be fixedly connected to the airbag.

[0039] Each of the aforementioned air pipes is fixedly equipped with a valve solenoid valve, and every two opposing valve solenoid valves are controlled by the same switching signal.

[0040] Compared with the prior art, the beneficial effects of the present invention are:

[0041] This sampling device for monitoring fish communities based on environmental DNA technology, through the coordinated arrangement of a float device, a sampling device, and a collection device, allows the entire sampling device to float on the water surface and collect samples from shallow water areas. Furthermore, the combination of a shape adjustment device and a float device allows control over the buoyancy of the entire sampling device, enabling it to submerge in the water and suspend at different heights, facilitating multi-location and multi-faceted sampling and increasing sampling diversity. The device can also move in the water, facilitating regional sampling and saving time and manpower. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the main structure of the data acquisition device.

[0043] Figure 2 This is a schematic diagram of the front sectional view of the sampling device and the receiving device.

[0044] Figure 3 This is a top view of the sample collection device.

[0045] Figure 4 This is a schematic diagram of the main structure of the shape adjustment device.

[0046] Figure 5 This is a schematic diagram of the front sectional view of the shape adjustment device.

[0047] Figure 6 This is a top view of the shape adjustment device.

[0048] Figure 7 This is a top view of the structure of the float device.

[0049] Wherein: 1-Sampling device; 101-Collection box; 102-Collection motor; 103-Outer tube; 104-Baffle; 105-Collection head; 106-Inner tube; 107-Connecting tube; 108-Collection tube; 109-Outer bevel gear; 110-Inner bevel gear; 111-First drive gear; 2-Collection device; 201-Collection bottle; 202-Collection solenoid valve; 2021-Hollow plate; 2022-Solenoid valve; 2023-2024-Branch connection port; 203-Main connecting pipe; 204-Transfer pump; 205-Bottle stopper; 3-Propeller; 4-Core rod; 5-Wide-body gear; 6-Shaped body Adjustment device; 601-Telescopic rod; 602-Box; 603-Hose; 604-Concave housing; 605-Chain belt; 606-Driven toothed post; 607-Driven toothed post; 608-Driven gear; 609-Second drive gear; 610-Transmission rod; 611-Fixing plate; 612-Drive rod; 613-Motor; 614-Pry bar; 615-Support shaft; 616-Bearing; 617-Clamping plate; 618-Through groove; 7-Bridging rod; 8-Sliding sleeve; 801-T-shaped rod; 802-Spring; 803-Airbag; 804-Air pipe; 805-Solenoid valve; 806-Air disc; 807-Air pump. Detailed Implementation

[0050] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0051] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0052] 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 embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention. Example 1:

[0053] Please see Figure 1-7 A collection device for monitoring fish communities based on environmental DNA technology includes a sampling device 1 and a receiving device 2. The sampling device 1 and the receiving device 2 are submerged in water. The sampling device 1 draws liquid samples, and the liquid samples are transported and stored in the receiving device 2.

[0054] Above the sampling device 1 and the receiving device 2, there is a shape adjustment device 6 and a float device. The float device controls the floating and sinking state of the sampling device so that the sampling device is suspended in the water. The shape adjustment device 6 controls the unfolding state of the sampling device and adjusts the suspension height of the sampling device in the water.

[0055] The shape adjustment device 6 is equipped with propeller assemblies on both sides. The propeller assemblies and the shape adjustment device 6 work together to control the movement of the collection device in the water. The propeller assemblies on the shape adjustment device 6 can be driven by one side to turn, or the propeller assemblies on both sides of the shape adjustment device 6 can be driven synchronously to move the collection device in a straight line in the water.

[0056] It should be noted that the data acquisition device also includes a power supply, which can be installed in the appropriate location as needed; details will not be elaborated here. Furthermore, a remote control is added to pair with the data acquisition device, increasing ease of use. The remote control can be selectively manufactured according to actual needs; details will also not be elaborated here. Example 2:

[0057] Please see Figure 1-2 Based on the above embodiments, the sampling device for monitoring fish communities based on environmental DNA technology includes a sampling box 101, a sampling motor 102, an outer tube 103, an arc-shaped baffle 104, a sampling head 105, an inner tube 106, a connecting tube 107, a sampling tube 108, an outer bevel gear 109, an inner bevel gear 110, and a first drive gear 111.

[0058] The collection box 101 is rotatably connected to an outer bevel gear 109 and an inner bevel gear 110. The first drive gear 111 meshes with both the outer bevel gear 109 and the inner bevel gear 110, and drives the outer bevel gear 109 and the inner bevel gear 110 to rotate in both directions.

[0059] A data acquisition motor 102 is fixedly connected to one side of the first drive gear 111. The data acquisition motor 102 is fixedly installed on the side wall of the data acquisition box 101, and its drive shaft is fixedly connected to the first drive gear 111. The data acquisition motor 102 is configured as a reciprocating motor, which drives the first drive gear 111 to rotate reciprocally.

[0060] One end of the outer tube 103 passes through the collection box 101 and is fixedly connected to the outer bevel gear 109, while the other end is fixedly connected to a baffle 104;

[0061] The inner tube 106 is located inside the outer tube 103, and one end of it passes through the acquisition box 101, the outer bevel gear 109 and is fixedly connected to the inner bevel gear 110, while the other end is fixedly connected to the acquisition head 105 with a spherical structure.

[0062] The receiving tube 107 is located inside the inner tube 106, and one end of it passes through the inner tube 106 and is connected to the sample receiving device 2 in the collection box 101. The other end passes through the collection head 105 and is fixedly connected to the collection tube 108. One end of the collection tube 108 fits into the inside of the collection head 105.

[0063] The acquisition tube 108 is designed with a symmetrical "V" shape. The acquisition end of the acquisition tube 108 fits inside the acquisition head 105 and is flush with the outer wall of the acquisition head 105. The baffle 104 is designed with an arc shape and fits snugly on the outer wall of the acquisition head 105. The two ends of the baffle 104 block the acquisition end of the acquisition tube 108.

[0064] Specifically, in use, the acquisition motor 102 is started to drive the outer bevel gear 109 and the inner bevel gear 110 to rotate in both directions, thereby keeping the outer tube 103 and the inner tube 106 in a state of rotation in both directions. At this time, the baffle 104 and the acquisition head 105 also rotate in both directions. Since one end of the acquisition tube 108 fits into the inside of the acquisition head 105, the baffle 104 and one end of the acquisition tube 108 form an interlaced shape. The baffle 104 will not block the acquisition tube 108. When the baffle 104 blocks one end of the acquisition tube 108 inside the acquisition head 105 again, it is considered as one rotation cycle. During this cycle, the baffle 104 will not block the acquisition tube 108, so sampling is carried out through the connecting tube 107 and the acquisition tube 108.

[0065] To prevent the connector tube 107 from winding inside the acquisition box 101, the acquisition motor 102 is set as a reciprocating motor, so that one end of the connector tube 107 will not be wound in one direction continuously, and only the rotation length of one cycle is reserved.

[0066] The solution in this embodiment can be selectively combined with solutions in other embodiments. Example 3:

[0067] Please see Figure 1-3 Based on the above embodiments, the sampling device for monitoring fish communities based on environmental DNA technology includes a sampling bottle 201, a sampling solenoid valve 202, a main connecting pipe 203, a delivery pump 204, and a bottle stopper 205.

[0068] The sample collection bottle 201 is fixedly installed on the top of the collection box 101. The sample collection bottle 201 is composed of multiple independent collection bottles fixed side by side.

[0069] One end of the sample collection bottle 201 is fixedly connected to the sample collection solenoid valve 202 via a branch pipe, and the other end is threadedly fixed with a bottle stopper 205. The sample collection solenoid valve 202 includes a hollow plate 2021, a solenoid valve 2022, a main connection port 2023, and a branch connection port 2024. The solenoid valve 2022 and the branch connection port 2024 correspond to the number of collection bottles, and each solenoid valve 2022 can independently control the collection bottle.

[0070] One end of the sample receiving solenoid valve 202 is fixedly connected to the main connecting pipe 203. The main connecting pipe 203 is fixedly connected to the interior of the hollow plate 2021 through the main connecting port 2023. The main connecting pipe 203 is fixedly connected to the outlet end of the delivery pump 204.

[0071] After one end of the connecting pipe 107 passes through the inner pipe 106, it is fixedly connected to the water inlet of the delivery pump 204 inside the collection box 101.

[0072] The delivery pump 204 is fixedly installed on the other side wall of the collection box 101, opposite to the collection motor 102. The delivery pump 204 and the collection motor 102 are set opposite to each other, which can balance the weight on both sides of the collection box 101 and keep the collection box 101 in a balanced state.

[0073] Specifically, in use, samples are collected by connecting the delivery pump 204, the connecting pipe 107, and the collection pipe 108. Then, the samples are individually delivered to multiple collection bottles 201 through the main connecting pipe 203 and the collection solenoid valve 202. Since the collection solenoid valve 202 is equipped with multiple independent branch connection ports 2024 and corresponding solenoid valves 2022, each solenoid valve 2022 can independently control the collection bottle, enabling independent sampling of each area.

[0074] Additionally, it should be noted that during the initial sample collection, the inlet tube 107, collection tube 108, main connecting tube 203, delivery pump 204, and receiving solenoid valve 202 are empty. Therefore, the sample collected in one reciprocating rotation cycle of the collection motor 102 is designed to just fill the inlet tube 107, collection tube 108, main connecting tube 203, delivery pump 204, and receiving solenoid valve 202. Thus, during the initial sampling, at least two cycles of forward and reverse rotation of the collection motor 102 are required. One cycle is used to fill the aforementioned components, and the next cycle allows the sample from these components to be transferred to the receiving bottle 201. Similarly, when drawing sample into the next receiving bottle 201, at least two cycles are also required for sample collection. In other words, one forward and reverse rotation of the collection motor 102 can be considered a large cycle, but the sample volume in the receiving bottle 201 during the initial sampling is relatively small.

[0075] The solution in this embodiment can be selectively combined with solutions in other embodiments. Example 4:

[0076] Please see Figure 1 and Figures 4-6 Based on the above embodiments, the collection device for monitoring fish communities based on environmental DNA technology includes a shape adjustment device 6 comprising an electrically controlled telescopic rod 601 and a box 602.

[0077] The box body 602 has concave shells 604 on both sides. A chain 605 is provided inside the concave shell 604. The two ends of the chain 605 are connected and spread apart by a driving toothed post 607 and a driven toothed post 606, respectively. The two ends of the driving toothed post 607 and the driven toothed post 606 are rotatably connected inside the concave shell 604.

[0078] A driven gear 608 is fixedly sleeved on the outer wall of the middle end of the active toothed post 607. A second drive gear 609 is meshed with one side of the driven gear 608. A transmission rod 610 is fixedly connected to one side of the second drive gear 609. The transmission rod 610 is connected to the concave housing 604 through a fixing plate 611, and a drive rod 612 is driven to one end of the transmission rod 610. One end of the drive rod 612 passes through the concave housing 604 and is fixedly connected to a motor 613. The motor 613 is fixedly installed on the concave housing 604 and drives the drive rod 612 through the motor 613.

[0079] The fixed plate 611 and the transmission rod 610 are rotatably connected, and the fixed plate 611 restricts the position of the transmission rod 610; one end of the motor 613 is fixedly connected to a pry bar 614, which passes through the box 602 and is rotatably connected to the inside of the box 602 through a support shaft 615; a through groove 618 is provided inside the side wall of the box 602 so that the pry bar 614 can pass through the box 602 easily.

[0080] A bearing 616 is fixedly sleeved at one end of the pry bar 614, and connecting plates 617 are hinged to both sides of the bearing 616 via pivots. The bearing and connecting plates facilitate rotation of one end of the pry bar based on the support shaft. A telescopic rod 601 is fixedly mounted on the housing 602, with its movable end passing through the housing 602 and fixedly connected to the top of the connecting plate 617. The telescopic rod 601 drives the connecting plate 617 to move up and down.

[0081] The motor 613 is covered with a flexible hose 603, and the two ends of the flexible hose 603 are fixedly connected to the concave housing 604 and the box 602 respectively.

[0082] The propeller assembly includes a propeller 3, a core rod 4, a wide-body gear 5, and a bridging rod 7.

[0083] The chain belt 605 is also internally connected to a wide-body gear 5, and a core rod 4 is fixedly inserted through the wide-body gear 5. The two ends of the core rod 4 are rotatably connected to the inner side wall of the concave housing 604, and the middle end of the core rod 4 is fixedly connected to the inner top wall of the concave housing 604 through a bridging rod 7. One end of the core rod 4 passes through the side wall of the concave housing 604 and is fixedly connected to a propeller 3. The chain belt 605 drives the wide-body gear 5 to rotate, which in turn causes the core rod 4 to rotate, thereby causing the propeller 3 to rotate.

[0084] Specifically, in use, by activating two motors 613 simultaneously or individually, they drive the drive rod 612 and transmission rod 610 to rotate, thereby causing the second drive gear 609 to drive the driven gear 608 to rotate. This causes the driving toothed column 607 and the driven toothed column 606 to drive the chain belt 605 for transmission. The chain belt 605 drives multiple wide-body gears 5 to rotate, causing the core rod 4 to rotate, which in turn causes the propeller 3 to rotate, providing thrust. When the two motors 613 are started simultaneously, the propellers 3 on both sides provide thrust simultaneously, which can move the entire device. When one of the motors 613 is started, only one propeller 3 provides thrust, which can be used for steering.

[0085] When it is necessary to change the shape of the body adjustment device 6, it can be submerged in water in conjunction with the float device. By activating the telescopic rod 601, it drives one end of the two levers 614 to rotate upward or downward simultaneously. When one end of the two levers 614 rotates upward simultaneously, the entire body adjustment device 6 expands its range, increases the direct contact area with the water, and increases the buoyancy. When one end of the two levers 614 rotates downward simultaneously, the entire body adjustment device 6 expands its range, decreases the direct contact area with the water, and reduces the buoyancy.

[0086] The solution in this embodiment can be selectively combined with solutions in other embodiments. Example 5:

[0087] Please see Figure 1 , 4 7. Based on the above embodiments, the collection device for monitoring fish communities based on environmental DNA technology includes a float device comprising a sliding sleeve 8, a T-shaped rod 801, a spring 802, an air bladder 803, an air tube 804, an air valve solenoid valve 805, an air disc 806, and an air pump 807.

[0088] The air plate 806 and the sliding sleeve 8 are fixedly installed on the concave housing 604. The sliding sleeve 8 is configured as a bent structure. A T-shaped rod 801 is slidably connected inside the vertical part of the sliding sleeve 8. A spring 802 is provided between the T-shaped rod 801 and the sliding sleeve 8 for elastic connection. An air bag 803 is fixedly connected to the bottom of its flat part. The spring 802 is sleeved on the outside of the sliding sleeve 8 and the T-shaped rod 801. One end of the spring 802 is located at the bend of the sliding sleeve 8, and the other end is fixedly connected to the flat part of the T-shaped rod 801. There are multiple sets of the combined structure of the sliding sleeve 8, the T-shaped rod 801, the spring 802 and the air bag 803, which are arranged in a ring array around the air plate 806.

[0089] The air pump 807 is fixedly installed inside the air plate 806, and it is connected to multiple air pipes 804 through branch joints. One end of the air pipe 804 passes through the horizontal part of the sliding sleeve 8, the vertical part of the sliding sleeve 8, and the interior of the T-shaped rod 801 in sequence to be fixedly connected to the airbag 803.

[0090] It should be noted that multiple air pipes 804 are fixedly installed with valve solenoid valves 805. Every two opposing valve solenoid valves 805 are controlled by the same switch signal. The two opposing valve solenoid valves 805 are controlled by the same switch, which can ensure that the air pump 807 simultaneously draws gas from two opposing air bags 803, ensuring the overall symmetry and making the overall structure more balanced.

[0091] Specifically, in use, by opening all the solenoid valves 805, air can be pumped into all the airbags 803 by the air pump 807, causing the airbags 803 to expand. When multiple airbags 803 expand, the entire device can float on the water surface.

[0092] When the entire device needs to be submerged in water, the air pump 807 draws gas from all the airbags 803, causing the airbags 803 to deflate and folding the shape of the deformable body adjustment device 6, allowing the entire device to submerge. For easy sampling, the entire device can be suspended in water. By opening two or more opposing airbags 803, the buoyancy of the entire device can be increased, enabling it to suspend. At the same time, it can also be used in conjunction with the deployment of the deformable body adjustment device 6 and the airbags 803 to suspend the device, increasing the adjustability of the suspension height.

[0093] The solution in this embodiment can be selectively combined with solutions in other embodiments.

[0094] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection of this invention. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of this invention, or equivalent structural, procedural, or functional transformations made using the description and drawings of this invention, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of protection of this invention.

Claims

1. A collection device for monitoring fish community based on environmental DNA technology, characterized in that: The sampling device (1) and the sample collecting device (2) are submerged in water, the liquid sample is sucked by the sampling device (1), and the liquid sample is stored in the sample collecting device (2) after being transported; The upper part of the sampling device (1) and the sample collecting device (2) is provided with a shape adjusting device (6) and a floating device, the floating state of the sampling device is controlled by the floating device, so that the sampling device is suspended in water, and the shape adjusting device (6) controls the expansion state of the sampling device and adjusts the suspension height of the sampling device in water; The two sides of the shape adjusting device (6) are provided with propeller assemblies, the propeller assemblies and the shape adjusting device (6) are matched to control the movement of the sampling device in water, the propeller assemblies can drive the sampling device to turn on one side, or the propeller assemblies on the two sides of the shape adjusting device (6) are synchronously driven to drive the sampling device to move linearly in water; The shape adjusting device (6) comprises an electrically-controlled telescopic rod (601) and a box body (602); The two sides of the box body (602) are provided with recessed housings (604), the recessed housings (604) are internally provided with a chain belt (605), the two ends of the chain belt (605) are connected and expanded by a driving toothed column (607) and a driven toothed column (606), and the two ends of the driving toothed column (607) and the driven toothed column (606) are rotationally connected in the recessed housings (604); The middle end of the driving toothed column (607) is fixedly sleeved with a driven gear (608), one side of the driven gear (608) is meshingly connected with a second driving gear (609), one side of the second driving gear (609) is fixedly connected with a transmission rod (610), the transmission rod (610) is connected with the recessed housings (604) through a fixed plate (611), one end of the transmission rod (610) is transmissionally connected with a driving rod (612), one end of the driving rod (612) penetrates through the recessed housings (604) and is fixedly connected with a motor (613), the motor (613) is fixedly installed on the recessed housings (604), and the motor (613) drives the driving rod (612); The fixed plate (611) and the transmission rod (610) are rotationally connected, and the fixed plate (611) limits the position of the transmission rod (610); One end of the motor (613) is fixedly connected with a crowbar (614), the crowbar (614) penetrates through the box body (602) and is rotationally connected to the inside of the box body (602) through a supporting shaft (615); A through groove (618) is formed in the inside of the sidewall of the box body (602) to facilitate the crowbar (614) to penetrate through the box body (602); One end of the crowbar (614) is fixedly sleeved with a bearing (616), and the two sides of the bearing (616) are hingedly connected with a connecting plate (617) through a rotating shaft; The telescopic rod (601) is fixedly installed on the box body (602); The movable end of the telescopic rod (601) penetrates through the box body (602) and is fixedly connected with the top of the connecting plate (617), and the connecting plate (617) is driven to move up and down by the telescopic rod (601); The motor (613) is externally sleeved with a hose (603), and the two ends of the hose (603) are fixedly connected with the concave shell (604) and the box body (602) respectively. 2.The collection device for monitoring fish community based on environmental DNA technology according to claim 1, characterized in that: The sampling device (1) comprises a collecting box (101), a collecting motor (102), an outer tube (103), an arc-shaped baffle (104), a collecting head (105), an inner tube (106), a connecting tube (107), a collecting tube (108), an outer conical gear (109), an inner conical gear (110) and a first driving gear (111); The outer conical gear (109) and the inner conical gear (110) are rotatably connected in the collecting box (101), the first driving gear (111) is in meshing connection with the outer conical gear (109) and the inner conical gear (110) at the same time, and drives the outer conical gear (109) and the inner conical gear (110) to rotate in opposite directions; One end of the outer tube (103) penetrates through the collecting box (101) and is fixedly connected with the outer conical gear (109), and the other end is fixedly connected with the baffle (104); The inner tube (106) is located in the outer tube (103), one end of the inner tube (106) penetrates through the collecting box (101), the outer conical gear (109) and the inner conical gear (110) and is fixedly connected with the inner conical gear (110), and the other end is fixedly connected with the collecting head (105) in the form of a spherical structure; The connecting tube (107) is located in the inner tube (106), one end of the connecting tube (107) penetrates out of the inner tube (106) and is connected with the sampling device (2) in the collecting box (101), and the other end penetrates through the collecting head (105) and is fixedly connected with the collecting tube (108), and one end of the collecting tube (108) is fitted into the inner part of the collecting head (105).

3. The collection device for monitoring fish community based on environmental DNA technology according to claim 2, characterized in that: The collecting tube (108) is arranged in a symmetrical "inverted V" shape, the collecting end of the collecting tube (108) is fitted into the inner part of the collecting head (105) and is flush with the outer wall of the collecting head (105).

4. The collection device for monitoring fish community based on environmental DNA technology according to claim 3, characterized in that: The baffle (104) is arranged in an arc-shaped structure and is attached to the outer wall of the collecting head (105), and the two ends of the baffle (104) block the collecting end of the collecting tube (108).

5. The collection device for monitoring fish community based on environmental DNA technology according to claim 2, characterized in that: The sampling device (2) comprises a sampling bottle (201), a sampling electromagnetic valve (202), a total connecting tube (203), a delivery pump (204) and a bottle plug (205); One end of the sampling bottle (201) is fixedly connected with the sampling electromagnetic valve (202) through a branch pipe, the other end is threadedly fixed with the bottle plug (205), one end of the sampling electromagnetic valve (202) is fixedly connected with the total connecting tube (203), and the total connecting tube (203) is fixedly connected with the water outlet end of the delivery pump (204). The extension pipe (107) is fixedly connected with the water inlet end of the delivery pump (204) after penetrating out of the inner pipe (106) from the inside of the collection box (101).

6. The collection device for monitoring fish community based on environmental DNA technology according to claim 5, characterized in that: The sample collection bottle (201) is composed of multiple independent collection bottles arranged side by side. The sample collection electromagnetic valve (202) comprises a hollow plate (2021), an electromagnetic valve (2022), a total connection port (2023) and a branch communication port (2024). The electromagnetic valve (2022) and the branch communication port (2024) correspond to the number of collection bottles, and each electromagnetic valve (2022) can independently control the collection bottles. The total connection pipe (203) is fixedly connected to the inside of the hollow plate (2021) through the total connection port (2023). 7.The collection device for monitoring fish community based on environmental DNA technology according to claim 1, characterized in that: The propeller assembly comprises a propeller (3), a core rod (4), a wide gear (5) and a bridging rod (7). The inside of the chain belt (605) is further connected with a wide gear (5), the inside of the wide gear (5) is fixedly penetrated with a core rod (4), both ends of the core rod (4) are rotatably connected to the inside side wall of the concave shell (604), and the middle end of the core rod (4) is fixedly connected to the inside top wall of the concave shell (604) through the bridging rod (7). One end of the core rod (4) is fixedly connected with the propeller (3) penetrating through the side wall of the concave shell (604). 8.The collection device for monitoring fish community based on environmental DNA technology according to claim 1, characterized in that: The float device comprises a sliding sleeve (8), a T-shaped rod (801), a spring (802), an air bag (803), an air pipe (804), an air valve electromagnetic valve (805), an air disc (806) and an air pump (807). The sliding sleeve (8) is arranged in a bent structure, the vertical part of the sliding sleeve (8) is slidably connected with the T-shaped rod (801), the spring (802) is arranged between the T-shaped rod (801) and the sliding sleeve (8) for elastic connection, and the bottom of the flat plate part is fixedly connected with the air bag (803). The combination structure of the sliding sleeve (8), the T-shaped rod (801), the spring (802) and the air bag (803) is arranged in multiple groups and arranged in a ring array around the air disc (806). The air pump (807) is fixedly arranged in the inside of the air disc (806), and a plurality of air pipes (804) are connected to the air pump (807) through branch joints, one end of the air pipe (804) is fixedly connected with the air bag (803) penetrating through the horizontal part of the sliding sleeve (8), the vertical part of the sliding sleeve (8) and the inside of the T-shaped rod (801) in sequence. 9.The collection device for monitoring fish community based on environmental DNA technology according to claim 8, characterized in that: The air valve electromagnetic valve (805) is fixedly arranged on each air pipe (804), and each two opposite air valve electromagnetic valves (805) are controlled by the same switch signal.

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