Unmanned aerial vehicle airborne automatic water sample collection device and method

Abstract

The invention discloses an unmanned aerial vehicle airborne automatic water sample collection device, which comprises an unmanned aerial vehicle used for moving a collection cylinder to a position above a collection water surface and bringing the collection cylinder back to the ground after collection is completed; the connecting rope is used for connecting the unmanned aerial vehicle with the collecting cylinder; the collecting cylinder is positioned below the unmanned aerial vehicle and is used for providing a storage space for the collected water sample; a water inlet is formed in the bottom of the collecting barrel, and a collected water sample enters the collecting barrel; the locking assembly is arranged at the water inlet in the bottom of the collecting cylinder and is used for closing and opening the water inlet; and the drainage assembly is arranged at the middle section of the collection cylinder and is used for discharging the water sample from the collection cylinder. The device has the beneficial effects that the sampling efficiency is improved, the labor intensity of operators is reduced, the human input is reduced, the sampling cost is reduced, the personnel safety is ensured, the filtering effect is improved, the accuracy and stability of water sample collection are ensured, the operation is convenient and fast, and the like.

Description

Technical Field

[0001] The present invention relates to a collection device and method, and more particularly to an automatic water sample collection device and method for being carried on an unmanned aerial vehicle (UAV). Background Art

[0002] As a core way to understand the water body condition, water sample collection occupies an irreplaceable and important position in many fields. From ecological environment monitoring, to control of industrial production water use, to water body research in the scientific research field, etc., accurate and comprehensive water sample collection is the basis for obtaining reliable data, which is of great significance for relevant decision-making and research promotion;

[0003] However, in actual operation, traditional water sample collection methods rely too much on manual on-site operations. In the near-shore shallow water area, staff usually directly scoop water samples using simple tools such as plastic bottles and buckets. Although the operation is simple, the collected water samples have a large randomness, and at the same time, only samples from the upper water area can be collected, and deeper water samples cannot be collected, making it difficult to ensure scientificity; in deeper water areas, professional tools such as plexiglass water samplers and reversing water samplers need to be used and lowered to the specified depth through ropes for collection;

[0004] However, there are many drawbacks to this traditional collection method. First of all, the efficiency of manual sampling is very low. When conducting large-area water area monitoring, professional personnel need to go to each sampling point one by one, which undoubtedly consumes a large amount of human and time costs. It is very difficult to obtain water sample data over a large range in a short time and cannot timely reflect the overall condition of the water body; secondly, manual sampling is greatly restricted by terrain and environmental factors. In remote areas, swamp areas, or areas with serious pollution and safety risks, it is often difficult for staff to reach, making the water sample collection work in these areas unable to be carried out normally, resulting in serious lack of monitoring data. Moreover, the traditional manual sampling combined with boat operation mode not only has low efficiency but also high costs. The use of boats requires additional purchase, maintenance, and operation costs, and not all sampling water areas are equipped with sampling boats. Even if there is a boat, sampling personnel must go to the middle of the water with the boat, and there are great safety hazards in a complex water area environment; in addition, existing sampling instruments generally lack the function of filtering solid impurities in water, and a large amount of impurities are often mixed into the collected water samples, which seriously interferes with the subsequent water sample analysis work, may cause deviations in the analysis results, and affect the accuracy of research conclusions. Summary of the Invention

[0005] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide an automatic water sample collection device and method for being carried on an unmanned aerial vehicle that can effectively solve the above-mentioned technical problems.

[0006] To achieve the above object, the present invention provides an automatic water sample collection device for an unmanned aerial vehicle (UAV), comprising

[0007] a UAV for moving the collection cylinder above the water surface to be sampled and bringing the collection cylinder back to the ground after the sampling is completed;

[0008] a connecting rope for connecting the UAV and the collection cylinder;

[0009] a collection cylinder located below the UAV for providing a storage space for the sampled water; a water inlet is provided at its bottom for the sampled water to enter the collection cylinder;

[0010] a locking assembly provided at the water inlet at the bottom of the collection cylinder for closing and opening the water inlet;

[0011] a drainage assembly provided in the middle section of the collection cylinder for discharging the water sample from the collection cylinder.

[0012] Further, the collection cylinder includes a cylinder body, the upper end of the cylinder body is threadedly connected with a cylinder cover, a rope connection ring is provided on the cylinder cover, the upper end of the connecting rope is detachably connected to the UAV, and the lower end of the connecting rope is connected to the cylinder body through the rope connection ring.

[0013] Further, the cylinder body includes a filtering area, a sampling and collection area with coincident centerlines is provided above the filtering area, and the diameter of the sampling and collection area is larger than that of the filtering area; the locking assembly is provided at the lower end of the filtering area, a boss is provided at the connection between the filtering area and the sampling and collection area, a plurality of insertion holes are provided on the boss, a first filter plate is provided on the boss, a plurality of first filter holes are provided on the first filter plate, a plurality of insertion columns are provided at the lower end of the first filter plate, and the first filter plate is positioned on the boss by inserting each insertion column into each insertion hole, and the drainage assembly is located at the sampling and collection area.

[0014] Further, a card slot is provided around the insertion column, a convex rib for cooperating with the card slot is provided on the inner wall of the insertion hole, and the convex rib is made of rubber material; the aperture of the first filter hole gradually increases from the water inlet end to the middle section, and the aperture of the first filter hole is the same from the middle section to the water outlet end.

[0015] Further, the locking assembly includes a positioning frame provided at the bottom of the filtering area, a water sealing plate for closing the water inlet is provided at the water inlet, the water sealing plate can move upward to disengage from the water inlet, the lower end of the water sealing plate is connected to the upper end of a second filter plate through a plurality of connecting columns, a second filter hole is provided on the second filter plate, and the second filter plate is slidably connected to the inner wall of the water inlet through a slide rail;

[0016] The upper end of the water sealing plate is connected to the positioning frame through a telescopic rod. A spring is sleeved on the telescopic rod. Guide rods are arranged on both sides of the spring. The upper ends of the guide rods are threadedly connected with limit caps. Each guide rod slidably passes through the positioning frame and the lower ends are simultaneously connected to the upper end of the water sealing plate.

[0017] Further, a bottom cover is arranged at the lower end of the cylinder body. The water inlet is opened on the bottom cover. A sealing edge is arranged at the upper end of the bottom cover. A sealing groove for cooperating with the sealing edge is opened at the lower end of the cylinder body. Supporting ears are arranged at the edges of the bottom cover and the cylinder body. The supporting ears are aligned in pairs and are detachably connected by bolts;

[0018] The positioning frame includes a top frame. Side frames are arranged on both sides of the top frame. Each side frame is simultaneously detachably connected to the bottom cover. Each guide rod slidably passes through the top frame.

[0019] Further, the water inlet has an intercepting frame arranged at the lower end of the bottom cover and opening upward. The intercepting frame is threadedly connected to the bottom cover and is fastened by screws. Third filtering holes are opened on the outer wall and bottom of the intercepting frame. Arc-shaped counterweight support feet connected to the bottom cover are arranged on both sides of the intercepting frame. First openings are arranged on the top frame, side frames and each arc-shaped counterweight support foot. The arc-shaped counterweight support feet are symmetrically arranged and the lower ends are lower than the lower end of the intercepting frame.

[0020] Further, a buoyancy adjustment component is arranged on the connecting rope;

[0021] The buoyancy adjustment component includes two arc-shaped clamping blocks. One ends of the arc-shaped clamping blocks are hinged and the other ends are locked by the cooperation of a screw rod and a nut. Clamping seats are detachably arranged on the inner walls of the arc-shaped clamping blocks. Locking grooves are opened on the inner walls of the clamping seats. The connecting rope is located between the locking grooves and is in fit with the locking grooves. A plurality of anti-slip grooves are opened in each locking groove;

[0022] A positioning block with a perforation is arranged on at least one clamping seat. A buoyancy ball is connected to the perforation through a buoyancy rope.

[0023] Further, the drainage component includes a drain pipe penetrating through the middle section of the collection cylinder. A valve is arranged on the drain pipe.

[0024] The usage method of the automatic water sample collection device for UAV airborne includes

[0025] First, connect the barrel of the sampling cylinder to the drone through a connecting rope; then, according to the depth requirement of the sampled water, adjust the position of the buoyancy adjustment component on the connecting rope. After the adjustment is completed, cooperate with the screw and nut to lock and fix it on the connecting rope. At this time, the connecting rope is located in the locking groove of the clamping seat, and connect the buoyancy rope and the buoyancy ball through the perforation on the positioning block;

[0026] After the preparatory work is completed, control the drone to take off, transport the device carrying the sampling cylinder above the water surface of the sampling area, and then make the drone descend; after the sampling cylinder enters the water, the water pressure acts on the water sealing plate, causing the spring force to move upward. The movement of the water sealing plate drives the connecting column and the second filter plate connected to it, and the second filter plate moves upward synchronously along the slide rail, thereby opening the water inlet. At this time, the water sample begins to flow into the sampling cylinder; at the same time, when the sampling cylinder reaches the depth of the sampled water, the buoyancy ball is on the water surface;

[0027] The flowing-in water sample first passes through the interception frame. The third filter holes opened on the outer wall and bottom of the interception frame can initially filter out larger impurities in the water. The water sample after preliminary filtration then passes through the second filter holes on the second filter plate for further filtration to remove smaller particulate impurities in the water. Subsequently, the water sample enters the filtration area and is filtered again through the first filter holes of the first filter plate, and then flows into the sampling collection area for storage;

[0028] When the sampling cylinder completes the water sample collection, control the drone to rise. As the sampling cylinder leaves the water surface, the water pressure on the water sealing plate disappears. Under the action of the spring force, the water sealing plate moves downward to re-close the water inlet. The drone brings the sampling cylinder back to the ground. After the sampling cylinder is brought back to the ground, open the valve on the drain pipe in the middle section drainage component of the sampling cylinder. At this time, under the action of gravity, the water sample naturally drains through the drain pipe to complete the sampling.

[0029] The present invention has the following beneficial effects:

[0030] 1) By using a drone for water sample collection, it solves the cumbersome mode of manual collection at each sampling point. The drone can quickly reach each sampling point in a large area of water, greatly shortening the sampling time, improving the sampling efficiency, quickly obtaining water sample data in a large range, timely reflecting the overall water body condition, and at the same time reducing the labor intensity of the operators;

[0031] 2) It breaks through the restrictions of terrain and environment on water sample collection. For remote areas, swamp areas, areas with serious pollution or areas with safety risks, it is difficult for humans to reach, while the drone can easily reach these areas for water sample collection, filling the gap in water sample collection in these areas and ensuring the integrity of monitoring data;

[0032] 3) It avoids the high cost problem of the traditional manual sampling mode combined with boats. There is no need to purchase, maintain, and operate boats, reducing the labor input and sampling cost. At the same time, the sampling personnel do not need to go to the middle of the water by boat, eliminating the safety hazards in the complex water environment and ensuring the safety of personnel;

[0033] 4) The device is provided with a multi-layer filtering structure, including an interception frame, a second filter plate, and a first filter plate. The interception frame can initially filter larger impurities, and the second filter plate further removes smaller particulate impurities, improving the filtering effect, reducing the risk of filter hole blockage, having less impurities in the collected water sample, providing a high-quality sample for subsequent water sample analysis, ensuring the accuracy and reliability of the analysis results, and being beneficial to scientific research and decision-making;

[0034] 5) Through the buoyancy adjustment component, the position and buoyancy of the buoyancy ball can be accurately adjusted according to the depth requirements of the collected water sample. The buoyancy ball is located on the water surface, which can not only be used as an intuitive indication of the collection depth to avoid misjudgment of the depth, but also play an auxiliary supporting role for the collection cylinder, reducing the stress on the connecting rope, lowering the risk of the connecting rope breaking, reducing the sway of the collection cylinder in the water, making the collection process more stable, and ensuring the accuracy and stability of water sample collection;

[0035] 6) Most of the connection methods of the components of the device are detachable connections. For example, the cylinder body is threadedly connected to the cylinder cover, the positioning frame is detachably connected to the bottom cover, and the interception frame is threadedly connected to the bottom cover, etc., which is convenient for installation, disassembly, and maintenance. The drain pipe of the drainage component is arranged in the middle section of the collection cylinder and is equipped with a valve. After the water sample collection is completed, the water sample can be naturally discharged through the drain pipe under the action of gravity, with convenient operation and facilitating subsequent water sample treatment and analysis work. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic structural diagram of a specific embodiment of the present invention.

[0037] Figure 2 is Figure 1 a partial enlarged structural diagram at position A in

[0038] Figure 3 a schematic structural diagram of the buoyancy adjustment component arranged on the connecting rope.

[0039] Figure 4 a schematic structural diagram of the inner wall of the clamping seat being provided with anti-slip grooves.

[0040] Figure 5 is a schematic structural diagram of the present invention without components such as a cylinder cover.

[0041] Figure 6 is a top view structural diagram of the figure without the first filter plate.

[0042] Figure 7It is a schematic structural diagram of an insertion post provided on a first filter plate.

[0043] Figure 8 It is Figure 7 A partial enlarged structural diagram at position B in [diagram name not specified].

[0044] Figure 9 It is a three-dimensional structural diagram of a cylinder.

[0045] Figure 10 It is a schematic structural diagram of a bottom cover removing components such as a positioning frame.

[0046] Figure 11 It is Figure 10 A partial enlarged structural diagram at position C in [diagram name not specified].

[0047] Figure 12 It is a schematic structural diagram of a water sealing plate closing a water inlet.

[0048] Figure 13 It is a schematic structural diagram of the water sealing plate moving upward.

[0049] Figure 14 It is a schematic structural diagram of a sealing groove provided at the bottom of the cylinder.

[0050] Figure 15 It is a schematic structural diagram of a sampling collection area and a filtering area provided inside the cylinder.

[0051] Figure 16 It is a cross-sectional structural diagram of the insertion post and the insertion hole used in cooperation. Detailed implementation manners

[0052] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0053] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0054] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "setting", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] As Figures 1 to 16 shown, an automatic water sample collection device for an unmanned aerial vehicle (UAV) includes

[0056] a UAV 1, which is used to move the collection cylinder 2 above the water surface for collection and bring the collection cylinder 2 back to the ground after the collection is completed;

[0057] a connecting rope 3, which is used to connect the UAV 1 and the collection cylinder 2;

[0058] a collection cylinder 2, which is located below the UAV 1 and provides a storage space 6 for the collected water sample; a water inlet 5 is provided at its bottom for the collected water sample to enter the collection cylinder 2;

[0059] a locking component 7, which is arranged at the water inlet 5 at the bottom of the collection cylinder 2 and is used to close and open the water inlet 5;

[0060] a drainage component 8, which is arranged in the middle section of the collection cylinder 2 and is used to drain the water sample from the collection cylinder 2.

[0061] The collection cylinder 2 includes a cylinder body 9, the upper end of the cylinder body 9 is threadedly connected with a cylinder cover 10, a rope connection ring 11 is arranged on the cylinder cover 10, the upper end of the connecting rope 3 is detachably connected to the UAV 1, and the lower end of the connecting rope 3 is connected to the cylinder body 9 through the rope connection ring 11.

[0062] The cylinder body 9 includes a filtering area 12, above the filtering area 12 there is a sampling and collection area 13 with the same center line, the diameter of the sampling and collection area 13 is larger than that of the filtering area 12; the locking component 7 is arranged at the lower end of the filtering area 12, there is a boss 15 at the connection between the filtering area 12 and the sampling and collection area 13, a number of insertion holes 16 are opened on the boss 15, a first filter plate 17 is arranged on the boss 15, a number of first filter holes 18 are opened on the first filter plate 17, a number of insertion posts 19 are arranged at the lower end of the first filter plate 17, and the first filter plate 17 is positioned on the boss 15 by inserting each insertion post 19 into each insertion hole 16, and the drainage component 8 is located at the sampling and collection area 13.

[0063] A card slot 20 is provided around the insertion post 19. A convex rib 21 that cooperates with the card slot 20 is provided on the inner wall of the insertion hole 16. The convex rib 21 is made of rubber material. The aperture of the first filter hole 18 gradually increases from the water inlet end to the middle section, and the aperture of the first filter hole 18 is the same from the middle section to the water outlet end.

[0064] The locking assembly 7 includes a positioning frame 22 provided at the bottom of the filtering area 12. A water sealing plate 23 for closing the water inlet 5 is provided at the water inlet 5. The water sealing plate 23 can move upward to disengage from the water inlet 5. The lower end of the water sealing plate 23 is connected to the upper end of the second filter plate 27 through a plurality of connecting columns 26. Second filter holes 28 are provided on the second filter plate 27. The second filter plate 27 is slidably connected to the inner wall of the water inlet 5 through a slide rail 29.

[0065] The upper end of the water sealing plate 23 is connected to the positioning frame 22 through a telescopic rod 30. A spring 31 is sleeved on the telescopic rod 30. Guide rods 32 are provided on both sides of the spring 31. A limit cover 33 is threadedly connected to the upper end of each guide rod 32. Each guide rod 32 slidably passes through the positioning frame 22 and is connected to the upper end of the water sealing plate 23 at the lower end.

[0066] A bottom cover 35 is provided at the lower end of the cylinder body 9. The water inlet 5 is provided on the bottom cover 35. A sealing rib 36 is provided on the upper end of the bottom cover 35. A sealing groove 37 that cooperates with the sealing rib 36 is provided around the lower end of the cylinder body 9. Support ears 50 are provided at the edges of the bottom cover 35 and the cylinder body 9. Each pair of support ears is aligned and detachably connected by bolts.

[0067] The positioning frame 22 includes a top frame 51. Side frames 52 are provided on both sides of the top frame 51. Each side frame 52 is detachably connected to the bottom cover 35 at the same time. Each guide rod 32 slidably passes through the top frame 51.

[0068] The water inlet 5 has an intercepting frame 55 provided at the lower end of the bottom cover 35 and opening upward. The intercepting frame 55 is threadedly connected to the bottom cover 35 and fastened by screws 56. Third filter holes 57 are provided on the outer wall and bottom of the intercepting frame 55. Arc-shaped counterweight support feet 58 connected to the bottom cover 35 are provided on both sides of the intercepting frame 55. First openings 53 are provided on the top frame 51, side frames 52 and each arc-shaped counterweight support foot 58. The arc-shaped counterweight support feet 58 are symmetrically arranged and the lower ends are lower than the lower end of the intercepting frame 55.

[0069] A buoyancy adjustment assembly 60 is provided on the connecting rope 3.

[0070] The buoyancy adjustment assembly 60 includes two arc-shaped clamping blocks 61. One end of each arc-shaped clamping block 61 is hinged, and the other end is locked by the cooperation of a screw 62 and a nut 63. A clamping seat 65 is detachably arranged on the inner wall of each arc-shaped clamping block 61. A locking groove 66 is formed on the inner wall of each clamping seat 65. The connecting rope 3 is located between and in contact with each locking groove 66. A plurality of anti-slip grooves 67 are formed in each locking groove 66.

[0071] At least one clamping seat 65 is provided with a positioning block 69 having a perforation 68. The perforation 68 is connected to a buoyancy ball 71 through a buoyancy rope 70.

[0072] The drainage assembly 8 includes a drain pipe 72 penetrating through the middle section of the collection cylinder 2. A valve is provided on the drain pipe 72.

[0073] The usage method of the automatic water sample collection device for an unmanned aerial vehicle includes

[0074] The efficient operation of the automatic water sample collection device in the present invention depends on a series of closely connected processes including preparation, collection, recovery, and water sample discharge, involving the coordinated cooperation of multiple components such as the unmanned aerial vehicle 1, the connecting rope 3, the collection cylinder 2, the locking assembly 7, the drainage assembly 8, etc. The specific working process is as follows:

[0075] First, connect the cylinder body 9 of the collection cylinder 2 to the unmanned aerial vehicle 1 through the connecting rope 3. When connecting, the upper end of the connecting rope 3 is detachably connected to the unmanned aerial vehicle 1, and the lower end passes through the rope connection ring 11 on the cylinder cover 10 and then is firmly connected to the cylinder body 9 to ensure a firm connection between the two and facilitate subsequent operations.

[0076] Install a positioning frame 22 on the bottom cover 35 where the water inlet 5 is located. The top frame 51 and the side frame 52 of the positioning frame 22 are detachably connected to the bottom cover 35 to facilitate subsequent maintenance and repair. Subsequently, install the assembly composed of the water sealing plate 23, the connecting column 26, the second filter plate 27, and the slide rail 29 at the water inlet 5. The upper end of the water sealing plate 23 is connected to the positioning frame 22 through a telescopic rod 30 and a guide rod 32. A spring 31 is sleeved on the telescopic rod 30 to provide an elastic supporting force for the water sealing plate 23. The upper end of the guide rod 32 is threadedly connected with a limit cover 33 to limit the stroke of the guide rod 32 and ensure the stable operation of the entire assembly.

[0077] Inside the cylinder body 9, installing the first filter plate 17 is one of the key steps. The insertion posts 19 of the first filter plate 17 are accurately inserted into the insertion holes 16 of the bosses 15. By using the cooperation between the card slots 20 on the insertion posts 19 and the rubber ridges 21 on the inner wall of the insertion holes 16, the stable installation of the first filter plate 17 at the connection between the filtration area 12 and the sampling and collection area 13 is realized. This design not only ensures the stability of the filter plate but also facilitates disassembly and replacement when needed.

[0078] According to actual requirements, an interception frame 55 is installed at the lower end of the bottom cover 35. During installation, the interception frame 55 is fixed to the bottom cover 35 through threaded connection and further tightened with screws 56 to ensure firm connection. The interception frame 55 is not a mandatory installation component and can be selected according to the specific water sample collection environment and requirements. The arc-shaped counterweight support feet 58 on both sides have multiple functions. On the one hand, when installing the interception frame 55, it can prevent the interception frame 55 from directly contacting the ground and other bases, playing a protective role. On the other hand, during the water sample collection process, the arc-shaped counterweight support feet 58 can increase the weight of the collection cylinder 2, playing a counterweight role and improving the collection efficiency.

[0079] According to the depth requirement of the collected water sample, adjust the position of the buoyancy adjustment component 60 on the connecting rope 3. After adjustment, through the cooperation of the screw 62 and the nut 63, lock and fix it on the connecting rope 3. At this time, the connecting rope 3 is located in the locking groove 66 of the clamping seat 65, and the anti-slip groove 67 in the locking groove 66 can effectively prevent the connecting rope 3 from sliding. The thickness of the clamping seat 65 can be replaced according to the thickness of the connecting rope 3 to ensure that the buoyancy adjustment component 60 can be stably installed on the connecting rope 3 to meet the requirements of different usage scenarios. Connect the buoyancy rope 70 and the buoyancy ball 71 through the through hole 68 on the positioning block 69;

[0080] After completing the preparatory work, control the drone 1 to take off, transport the device carrying the collection cylinder 2 above the water surface of the collection area, and then make the drone 1 descend;

[0081] After the collection cylinder 2 enters the water, at this time, due to the setting of the arc-shaped counterweight support feet 58, it effectively increases the descending speed of the collection cylinder 2, enabling it to quickly enter the water. The water pressure acts on the water sealing plate 23, causing it to move upward against the elastic force of the spring 31. The movement of the water sealing plate 23 drives the connecting column 26 and the second filter plate 27 connected to it, and the second filter plate 27 moves upward synchronously along the slide rail 29, thereby opening the water inlet 5. In the drone-borne automatic water sample collection device involved in the present invention, the opening mechanism of the water inlet 5 reduces the required water pressure through the optimization of each component to ensure the high efficiency and stability of the water sample collection process.

[0082] The present invention uses water pressure to open the water inlet. In order to enable the water inlet to be smoothly opened under a relatively low water pressure, on the one hand, for components such as the water sealing plate 23, the connecting column 26 connected thereto, and the second filter plate 27, materials with relatively light weights are selected. This design greatly reduces the weight of the overall components, so that when the water pressure pushes the water sealing plate 23, it does not need to overcome excessive gravity, reducing the requirement for the magnitude of the water pressure and making it smoother to open the water inlet 5. For example, when selecting materials, high-strength and lightweight alloy materials or high-performance engineering plastics are preferentially considered. While ensuring the structural strength of the components, the weight is effectively reduced, improving the response ability of the device to a relatively low water pressure;

[0083] On the other hand, the present invention uses a spring 31 with a low elastic coefficient. As one of the key factors hindering the movement of the water sealing plate 23, the elastic coefficient of the spring directly affects the water pressure required to open the water inlet. A spring with a low elastic coefficient generates relatively small elastic force under the same compression or tension state. This means that the water pressure only needs to overcome a relatively small spring elastic force to push the water sealing plate 23 upward, thereby opening the water inlet. This design enables the device to operate normally in a relatively low water pressure environment, broadening the applicable range of the device. Whether in shallow water areas or special water areas with relatively low water pressure, it can ensure the smooth progress of water sample collection work;

[0084] In addition, in order to further reduce the difficulty of opening the water inlet, the present invention has also made elaborate designs in terms of component cooperation. The second filter plate 27 and the slide rail 29 on the inner wall of the water inlet 5, as well as between the guide rod 32 and the positioning frame 22, all adopt a smooth cooperation method. By performing high-precision processing and treatment on the contact surfaces of these components, their surface roughness is extremely small, greatly reducing the friction force. In this way, when the water pressure pushes the water sealing plate 23 to move, the frictional resistance it receives is significantly reduced. Even under a relatively low water pressure, the water sealing plate 23 can move upward more smoothly, ensuring that the water inlet is opened in time and the water sample flows smoothly into the collection cylinder. The performance and practicality of the device are effectively improved.

[0085] At this time, the water sample begins to flow into the collection cylinder 2; during the entire water sample collection process, when the collection cylinder 2 gradually approaches and reaches the pre-set water sample collection depth under the hoisting of the unmanned aerial vehicle 1, at this time, the buoyancy ball 71 is exactly above the water surface. In the preparation stage, the operator adjusted the buoyancy adjustment assembly 60. By adjusting the length of the buoyancy rope 70 connected to the perforation 68 and selecting the specification of the buoyancy ball 71, it is ensured that when the collection cylinder 2 reaches the designated depth, the buoyancy ball 71 can just float on the water surface appropriately;

[0086] The buoyancy ball 71 floating on the water surface has many important functions. On the one hand, it can serve as an intuitive identifier to help the operator determine whether the sampling cylinder 2 has reached the predetermined sampling depth. In actual operation, the operator can quickly know the state of the sampling cylinder 2 by observing the position of the buoyancy ball 71, avoiding affecting the accuracy of water sample collection due to incorrect depth judgment. On the other hand, the buoyancy generated by the buoyancy ball 71 can play a certain auxiliary supporting role for the sampling cylinder 2. When the sampling cylinder 2 is underwater, it is affected by the combined action of the buoyancy of water and its own gravity. The existence of the buoyancy ball 71 is equivalent to providing an additional upward pulling force on the water surface, helping to reduce the stress on the connecting rope 3 and reducing the risk of the connecting rope 3 breaking due to excessive stress, ensuring the safety and stability of the sampling process. At the same time, this auxiliary support can also reduce the swaying of the sampling cylinder 2 in the water, making the sampling cylinder 2 more stable when collecting water samples and further improving the quality of water sample collection.

[0087] The inflowing water sample first passes through the intercepting frame 55. The third filter holes 57 opened on the outer wall and bottom of the intercepting frame 55 can initially filter out larger impurities in the water, such as branches and leaves. The water sample that has been initially filtered then passes through the second filter holes 28 on the second filter plate 27 for further filtration to remove smaller particulate impurities in the water. Subsequently, the water sample enters the filtration area 12 and is filtered again through the first filter holes 18 of the first filter plate 17. The aperture design of the first filter holes 18 improves the filtration effect while reducing the risk of filter hole blockage. Subsequently, it flows into the sampling collection area 13 for storage, providing high-quality water sample specimens for subsequent analysis and detection;

[0088] When the sampling cylinder 2 completes water sample collection, the operator controls the drone 1 to rise. As the sampling cylinder 2 leaves the water surface, the pressure of the water on the water sealing plate 23 disappears. Under the elastic force of the spring 31, the water sealing plate 23 moves downward to re-seal the water inlet 5, effectively preventing water sample leakage. The drone 1 brings the sampling cylinder 2 back to the ground;

[0089] After the sampling cylinder 2 is brought back to the ground, the valve on the drain pipe 72 in the middle section drainage assembly 8 of the sampling cylinder 2 is opened. At this time, under the action of gravity, the water sample naturally drains through the drain pipe 72 to complete sampling. It is used for subsequent water quality analysis, detection, etc., providing accurate data support for ecological environment monitoring, scientific research, etc.

[0090] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present invention based on the concept of the present invention through logical analysis, reasoning, or limited experiments on the basis of the existing technology should be within the protection scope determined by the claims.

Claims

1. An automatic water sample collection device for use on a drone, characterized in that: include The drone (1) is used to move the collection tube (2) above the water surface for collection, and bring the collection tube (2) back to the ground after the collection is completed; A connecting rope (3) is used to connect the drone (1) and the collection tube (2); The collection tube (2) is located below the drone (1) and is used to provide a storage space (6) for the collected water samples; a water inlet (5) is provided at the bottom thereof for the collected water samples to enter the collection tube (2); A locking assembly (7) is arranged at the water inlet (5) at the bottom of the collection tube (2) and is used to close and open the water inlet (5); A drainage component (8) is arranged in the middle section of the collection tube (2) and is used to discharge the water sample from the collection tube (2).

2. The automatic water sample collection device for use on a drone as claimed in claim 1, characterized in that: The collecting tube (2) comprises a tube body (9), the upper end of the tube body (9) is threadedly connected to a tube cover (10), the tube cover (10) is provided with a rope connecting ring (11), the upper end of the connecting rope (3) is detachably connected to the drone (1), and the lower end of the connecting rope (3) is connected to the tube body (9) via the rope connecting ring (11).

3. The automatic water sample collection device for use on a drone as claimed in claim 2 is characterized in that: The cylinder (9) comprises a filter area (12), and a sampling collection area (13) with a center line overlapping is provided above the filter area (12), and the diameter of the sampling collection area (13) is larger than the diameter of the filter area (12); the locking assembly (7) is arranged at the lower end of the filter area (12), and a boss (15) is provided at the connection between the filter area (12) and the sampling collection area (13), and a plurality of insertion holes (16) are provided on the boss (15), and a first filter plate (17) is provided on the boss (15), and a plurality of first filter holes (18) are provided on the first filter plate (17), and a plurality of insertion columns (19) are provided at the lower end of the first filter plate (17), and the first filter plate (17) is inserted into each of the insertion holes (16) through each of the insertion columns (19) and positioned on the boss (15), and the drainage assembly (8) is located at the sampling collection area (13).

4. The automatic water sample collection device for use on a drone as claimed in claim 3 is characterized by: A slot (20) is provided around the insertion column (19), and the inner wall of the insertion hole (16) is provided with a circle of ridges (21) used in conjunction with the slot (20), and the ridges (21) are made of rubber material; the aperture of the first filter hole (18) gradually increases from the water inlet end to the middle section, and the aperture of the first filter hole (18) is the same from the middle section to the water outlet end.

5. The automatic water sample collection device for use on a drone as claimed in claim 4 is characterized in that: The locking assembly (7) comprises a positioning frame (22) arranged at the bottom of the filtering area (12); a water sealing plate (23) for sealing the water inlet (5) is arranged at the water inlet (5); the water sealing plate (23) can be moved upwards to separate from the water inlet (5); the lower end of the water sealing plate (23) is connected to the upper end of a second filtering plate (27) via a plurality of connecting columns (26); a second filtering hole (28) is provided on the second filtering plate (27); the second filtering plate (27) is slidably connected to the inner wall of the water inlet (5) via a slide rail (29); The upper end of the water sealing plate (23) is connected to the positioning frame (22) through a lifting and retracting rod (30); a spring (31) is sleeved on the lifting and retracting rod (30); guide rods (32) are arranged on both sides of the spring (31); the upper end of each guide rod (32) is threadedly connected to a limit cover (33); each guide rod (32) is slidably inserted into the positioning frame (22), and the lower end is simultaneously connected to the upper end of the water sealing plate (23).

6. The automatic water sample collection device for use on a drone as claimed in claim 5 is characterized in that: A bottom cover (35) is provided at the lower end of the cylinder (9), the water inlet (5) is provided on the bottom cover (35), a circle of sealing edges (36) is provided at the upper end of the bottom cover (35), a circle of sealing grooves (37) used in conjunction with the sealing edges (36) is provided at the lower end of the cylinder (9), and supporting ears (50) are provided at the edges of the bottom cover (35) and the cylinder (9), and the supporting ears are aligned one by one and are detachably connected by bolts; The positioning frame (22) comprises a top frame (51), and side frames (52) are arranged on both sides of the top frame (51). Each of the side frames (52) is detachably connected to the bottom cover (35), and each of the guide rods (32) is slidably inserted into the top frame (51).

7. The automatic water sample collection device for use on a drone as claimed in claim 6, characterized in that: The water inlet (5) comprises an interception frame (55) which is arranged at the lower end of the bottom cover (35) and opens upward. The interception frame (55) is threadedly connected to the bottom cover (35) and fastened by screws (56). The outer wall and the bottom of the interception frame (55) are provided with a third filtering hole (57). Both sides of the interception frame (55) are provided with arc-shaped counterweight legs (58) connected to the bottom cover (35). The top frame (51), the side frame (52) and each of the arc-shaped counterweight legs (58) are provided with a first opening (53). The arc-shaped counterweight legs (58) are symmetrically arranged with their lower ends being lower than the lower end of the interception frame (55).

8. The automatic water sample collection device for use on a drone as claimed in claim 7, characterized in that: The connecting rope (3) is provided with a buoyancy adjustment component (60); The buoyancy adjustment assembly (60) comprises two arc-shaped clamping blocks (61), one end of each arc-shaped clamping block (61) is hinged, and the other end is locked by a screw (62) and a nut (63), the inner wall of each arc-shaped clamping block (61) is detachably provided with a clamping seat (65), the inner wall of each clamping seat (65) is provided with a locking groove (66), the connecting rope (3) is located between each locking groove (66) and fits with each locking groove (66), and each locking groove (66) is provided with a plurality of anti-slip grooves (67); At least one clamping seat (65) is provided with a positioning block (69) with a through hole (68), and the through hole (68) is connected to a buoyancy ball (71) via a buoyancy rope (70).

9. The automatic water sample collection device for use on a drone as claimed in claim 8, characterized in that: The drainage component (8) comprises a drainage pipe (72) passing through the middle section of the collection tube (2), and a valve is provided on the drainage pipe (72).

10. The method for using the automatic water sample collection device for use on a drone as claimed in claim 9, characterized in that: include First, the barrel (9) of the collection barrel (2) is connected to the drone (1) via the connecting rope (3); then, according to the depth requirement for collecting water samples, the position of the buoyancy adjustment component (60) on the connecting rope (3) is adjusted. After the adjustment is completed, the buoyancy adjustment component (60) is locked and fixed on the connecting rope (3) through the cooperation of the screw rod (62) and the nut (63). At this time, the connecting rope (3) is located in the locking groove (66) of the clamping seat (65), and the buoyancy rope (70) and the buoyancy ball (71) are connected through the through hole (68) on the positioning block (69); After the preparation work is completed, the drone (1) is controlled to take off, and the device carrying the collection tube (2) is transported to the surface of the water in the collection area, and then the drone (1) is lowered; after the collection tube (2) enters the water, the water pressure acts on the water sealing plate (23), so that the elastic force of its spring (31) moves upward, and the movement of the water sealing plate (23) drives the connecting column (26) and the second filter plate (27) connected thereto, and the second filter plate (27) moves upward synchronously along the slide rail (29), thereby opening the water inlet (5), and at this time, the water sample begins to flow into the collection tube (2); at the same time, when the collection tube (2) reaches the depth for collecting water samples, the buoyancy ball (71) is located on the water surface; The inflowing water sample first passes through the interception frame (55). The third filter hole (57) provided on the outer wall and the bottom of the interception frame (55) can initially filter out larger impurities in the water. The initially filtered water sample then passes through the second filter hole (28) on the second filter plate (27) for further filtration to remove smaller particle impurities in the water. Subsequently, the water sample enters the filtration area (12) and is filtered again through the first filter hole (18) of the first filter plate (17). Subsequently, the water sample flows into the sampling collection area (13) for storage. When the collection tube (2) completes water sample collection, the drone (1) is controlled to rise. As the collection tube (2) leaves the water surface, the pressure of the water on the water sealing plate (23) disappears. Under the elastic force of the spring (31), the water sealing plate (23) moves downward and re-closes the water inlet (5). The drone (1) brings the collection tube (2) back to the ground. After the collection tube (2) is brought back to the ground, the valve on the drainage pipe (72) in the drainage assembly (8) in the middle section of the collection tube (2) is opened. At this time, the water sample is naturally discharged through the drainage pipe (72) under the action of gravity to complete the sampling.

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