Sewage monitoring and sampling device based on unmanned aerial vehicle

Abstract

The sewage monitoring and sampling device comprises an unmanned aerial vehicle body, the bottom of the unmanned aerial vehicle body is connected with a sampling part, and the sampling part comprises a frame body, a tray, a rotating disc, a power part and a plurality of sampling containers; the plurality of sampling containers are annularly distributed on the tray, each sampling container comprises a barrel body, an exhaust port is formed in the top of each barrel body, a water inlet is formed in one side of the bottom of each barrel body, and a sliding plate which is in sealing fit is arranged in each barrel body and can control connection and disconnection of the water inlets and the inner space of each barrel body; a wedge-shaped first pressing block is arranged at the bottom of the turntable and can rotate along with the turntable to sequentially downwards extrude the push-pull rods, so that the water inlet is communicated with the space in the barrel body; the first elastic piece is used for driving the push-pull rod to move upwards and reset. The sampling device is simple in structure, meanwhile, the sampling container after sampling is completed cannot be polluted in the next sampling process, and liquid in the container cannot flow out.

Description

Technical Field

[0001] This invention relates to the field of wastewater sampling technology, and in particular to a wastewater monitoring and sampling device based on a drone. Background Technology

[0002] The statements herein provide only background information in relation to this invention and do not necessarily constitute prior art.

[0003] Wastewater sampling is a crucial part of water quality monitoring, and drone-based wastewater sampling is a novel and highly automated sampling method. Traditional drone-based wastewater sampling typically involves mounting a sampling device on the underside of the drone, which then flies to the sampling location carrying the device, collects the sample, and then flies back to collect the remaining sample from the device before conducting another sampling.

[0004] However, this traditional method of drone-based wastewater sampling can only sample one location at a time. After sampling, the drone needs to fly back to retrieve the sample before it can be sampled again, which is inefficient.

[0005] To address the aforementioned issues, Chinese invention patent CN112478162B discloses an internet-based drone capable of sampling multiple sewage sites. Although it can sample sewage from multiple sites, its structure is relatively complex and its weight is heavy, which reduces the drone's endurance.

[0006] Chinese utility model patent CN222137026U discloses a wastewater sampling device based on a drone. Its structure is relatively simple, but the inlet and outlet pipes at the bottom of the container cannot be sealed during the sampling process. During the second sampling, water from the sampling point can easily enter the container after the first sampling, causing the samples to mix and produce errors. Furthermore, since the inlet and outlet pipes cannot be sealed, the liquid in the container can easily flow out during the drone's flight and the sampling process, resulting in a reduction in the sample size.

[0007] Based on this, this application proposes a wastewater monitoring and sampling device based on unmanned aerial vehicles (UAVs) to solve the above problems. Summary of the Invention

[0008] The purpose of this invention is to address the aforementioned shortcomings by providing a wastewater monitoring and sampling device based on unmanned aerial vehicles (UAVs).

[0009] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A wastewater monitoring and sampling device based on a drone includes a drone body, a connecting rod at the bottom of the drone body, and a sampling component connected to the bottom end of the connecting rod. The sampling component includes a frame, a tray located inside the frame, a turntable rotatably mounted above the tray, a power component for driving the turntable to rotate, and multiple sampling containers mounted on the tray and located below the turntable. Multiple sampling containers are arranged in a ring on a tray, with the center of the ring coaxial with the turntable. Each sampling container includes a cylindrical body with an exhaust port at the top. A sliding plate is installed inside the cylindrical body, which is slidably disposed within the cylindrical body and sealed to the cylindrical wall. A water inlet is located on one side of the bottom of the cylindrical body. The sliding plate, which is slidably disposed within the cylindrical body, can control the connection between the water inlet and the internal space of the cylindrical body. A push-pull rod is installed on the sliding plate, with one end of the push-pull rod extending upward through the cylindrical body. A wedge-shaped first pressing block is installed at the bottom of the turntable. The first pressing block can rotate with the turntable and press the push-pull rod downward in sequence, causing the push-pull rod to move the sliding plate downward, thereby connecting the water inlet with the internal space of the cylindrical body. It also includes a first elastic element, which is used to drive the push-pull rod to move upward and reset, so that the water inlet is disconnected from the space inside the cylinder.

[0010] Furthermore, the push-pull rod passes through the top of the cylinder body from the exhaust port, and a conical plug is provided at the position of the push-pull rod corresponding to the exhaust port, which is used to block the exhaust port when the push-pull rod moves upward to reset.

[0011] Furthermore, a groove is provided at the corresponding position of the cylinder body of the tray, and a slot is provided laterally on the side wall of the groove. One end of the slot has a through groove that extends out of the surface of the tray. A limit block is provided at the corresponding position of the through groove on the cylinder body. The limit block can enter the slot through the through groove, and then the cylinder body is rotated to move the limit block to the end of the slot away from the through groove, thus completing the limit with the slot.

[0012] Furthermore, the corresponding turntable of the frame is in the shape of a downward-opening cylinder. The turntable is sealed to the inner wall of the frame and can rotate relative to the frame. A gear ring is provided on the top of the turntable, and a drive gear that meshes with the gear ring is provided at the output end of the power component.

[0013] Furthermore, the tray is provided with pivots on both sides, and the tray can be flipped up and down on the frame via the pivots, with the sampling containers distributed on the upper and lower sides of the tray; The frame is also equipped with a drive assembly for driving the tray to flip.

[0014] Furthermore, a connecting plate is provided above the turntable, and a connecting shaft is located at the rotation center of the turntable. One end of the connecting shaft passes through the connecting plate and is provided with a first bevel gear. The drive assembly includes a second bevel gear meshing with the first bevel gear, a drive shaft with one end connected to the second bevel gear and the other end extending out of the frame, a first drive wheel sleeved on the drive shaft, a second drive wheel sleeved on the rotating shaft, a disc spring located between the second drive wheel and the rotating shaft, and a transmission accessory connecting the first drive wheel and the second drive wheel; the first bevel gear can drive the second drive wheel to rotate one revolution for every revolution of the first bevel gear. It also includes a limiting component to prevent the pallet from flipping before the turntable completes one revolution, and to release the limiting component after the turntable completes one revolution, allowing the pallet to flip and re-limiting the flipped pallet.

[0015] Furthermore, the limiting component includes a sliding sleeve disposed on both sides of the corresponding rotating shaft of the frame, a slider slidably disposed inside the sliding sleeve, and a second elastic element disposed between the slider and the sliding sleeve. The second elastic element is used to push one end of the slider out of the sliding sleeve and out to the bottom of the tray. The sliding sleeve has a through hole running from top to bottom. The slider has a wedge-shaped groove running from top to bottom at the corresponding position of the through hole. The frame has a pressure rod vertically sliding at the corresponding position of each through hole. The pressure rod can pass through the through hole from top to bottom and enter the wedge-shaped groove to contact the inclined surface inside the wedge-shaped groove. Pressing down on the pressure rod can cause the bottom of the pressure rod to abut against the inclined surface of the wedge-shaped groove, causing the slider to slide into the sliding sleeve and move away from the bottom of the tray. It also includes a pressing component, which is used to press down the pressure rods in sequence under the drive of the turntable, so that the sliders located in the sliding sleeves on both sides of the rotating shaft move away from the bottom of the tray in sequence.

[0016] Furthermore, the pressing component includes a second pressing block disposed at the bottom of the turntable. The second pressing block is located at a position away from the rotation center of the turntable and is wedge-shaped. The second pressing block does not contact the push-pull rod during the rotation of the turntable. The pressing component also includes a pressing block located below the turntable. One end of the pressing block is located below the turntable, and the other end is connected to the pressure rod. When the turntable rotates, it can drive the second pressing block to press down the pressing block, causing the pressure rod to move downward.

[0017] Furthermore, the frame is equipped with a liquid level sensor to detect the depth of the sampled liquid and assist the UAV in positioning.

[0018] Furthermore, the length of the connecting rod is adjustable.

[0019] The beneficial effects of this invention are reflected in: This invention uses a rotating turntable to drive the first pressing block to sequentially press the push-pull rod, allowing the water to be sampled to enter the corresponding sampling container. The structure is simple, and the sampling container that has already been sampled will not be contaminated during the next sampling, nor will the liquid in the container flow out, thus reducing the sample size. Attached Figure Description

[0020] Figure 1 This is an overall schematic diagram of the wastewater monitoring and sampling device based on an unmanned aerial vehicle (UAV) according to this application. Figure 2 This is an exploded view of the sampling container described in this application; Figure 3 This is a half-sectional structural diagram of the sampling component described in this application; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 This is an overall schematic diagram of the sampling component described in this application; Figure 6 This is a schematic diagram of the structure of the turntable and the tray described in this application; Figure 7 for Figure 6 Enlarged view of point B in the middle; Figure 8 This is a schematic diagram of the bottom structure of the turntable described in this application; Figure 9 This is a schematic diagram of the limiting component described in this application.

[0021] In the picture: 1. The drone itself; 2. Connecting rod; 3. Sampling component; 31. Frame; 311. Limiting sleeve; 32. Tray; 321. Groove; 322. Slot; 323. Through slot; 324. Rotating shaft; 33. Turntable; 331. First pressing block; 332. Gear ring; 333. Connecting shaft; 334. First bevel gear; 335. Second pressing block; 34. Power component; 35. Drive gear; 36. Drive assembly; 361. Second bevel gear; 362. Transmission shaft; 363. First transmission wheel; 364. Second transmission wheel; 365. Disc spring; 366. Transmission accessories; 367. Sleeve; 37. Connecting plate; 38. Limiting component; 381. Sliding sleeve; 3811. Insertion hole; 382. Slider; 3821. Wedge groove; 383. Second elastic element; 384. Pressure rod; 385. Lower pressing block; 39. Sensor mounting base; 4. Sampling container; 41. Cylinder body; 42. Vent; 43. Slide plate; 44. Inlet; 45. Push-pull rod; 451. Extrusion end cap; 452. Conical plug; 46. First elastic element; 47. Limiting block. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figure 1 , Figure 2 , Figure 3 , Figure 8 The present invention discloses a wastewater monitoring and sampling device based on a drone, including a drone body 1, a connecting rod 2 at the bottom of the drone body 1, and a sampling component 3 connected to the bottom end of the connecting rod 2. The sampling component 3 includes a frame 31, a tray 32 located inside the frame 31, a turntable 33 rotatably arranged above the tray 32, a power component 34 for driving the turntable 33 to rotate, and multiple sampling containers 4 arranged on the tray 32 and located below the turntable 33. Multiple sampling containers 4 are arranged in a ring on the tray 32, with the center of the ring coaxial with the turntable 33. Each sampling container 4 includes a cylindrical body 41 with an exhaust port 42 at the top. A sliding plate 43 is installed inside the cylindrical body 41, which is slidably disposed within the cylindrical body 41 and seals against the cylindrical wall. A water inlet 44 is located on one side of the bottom of the cylindrical body 41. The sliding plate 43, which is slidably disposed within the cylindrical body 41, controls the opening and closing of the water inlet 44 and the internal space of the cylindrical body 41. A push-pull rod 45 is installed on the sliding plate 43, with one end of the push-pull rod 45 extending upward through the cylindrical body 41. A wedge-shaped first pressing block 331 is provided at the bottom of the turntable 33 (see...). Figure 8 The first pressing block 331 can rotate together with the turntable 33 and press the push-pull rod 45 downward in sequence, so that the push-pull rod 45 drives the slide plate 43 to move downward, so that the water inlet 44 is connected to the space inside the cylinder 41. It also includes a first elastic element 46, which drives the push-pull rod 45 to move upward and reset, so that the water inlet 44 is disconnected from the space inside the cylinder body 41.

[0024] In practice, the drone flies to the designated area above the water surface with the sampling component 3 via the connecting rod 2, and then moves down so that the water inlet 44 at the bottom of the cylinder 41 is below the water surface. Then the power component 34 is activated, driving the turntable 33 to rotate, causing the first pressing block 331 to press down on one of the push-pull rods 45. The side of the first pressing block 331 facing the push-pull rod 45 is a slope, so that the first pressing block 331 gradually presses the push-pull rod 45 down as it moves with the turntable 33 (at this time, the first elastic element 46 is under pressure). The push-pull rod 45 drives the slide plate 43 to move down, and finally connects the water inlet 44 with the space inside the cylinder 41, so that the water from the outside automatically enters the cylinder 41 through the water inlet 44. After the water sampling is completed, the turntable 33 is rotated to separate the first pressing block 331 from the top of the push-pull rod 45. At this time, the first pressing block 331 is located between two adjacent push-pull rods 45. After the first pressing block 331 at the top of the push-pull rod 45 is removed, the first elastic element 46 pushes the push-pull rod 45 upward to reset the push-pull rod 45 and disconnect the water inlet 44 from the space inside the cylinder 41.

[0025] It should be noted that after completing one sampling as needed, the drone can be controlled to fly to the next sampling point for a second sampling. One sampling can be done by pressing only one push-pull lever 45, or two samples can be taken at the same sampling point (i.e., pressing two push-pull levers 45).

[0026] In this application, the water to be sampled is brought into the corresponding sampling container 4 by rotating the turntable 33 to drive the first pressing block 331 to press the push-pull rod 45 in sequence. The structure is simple, and the sampling container 4 that has been sampled will not be contaminated during the next sampling, nor will the liquid in the container flow out, resulting in a reduction of the sample.

[0027] Preferably, the first elastic element 46 is a spring, the first elastic element 46 is located on the outside of the cylinder body 41, the end of the push-pull rod 45 extending out of the cylinder body 41 is provided with a compression end cap 451, and the first elastic element 46 is located between the cylinder body 41 and the compression end cap 451.

[0028] Preferably, the water inlet 44 has multiple openings arranged around the periphery of the cylinder body 41, which can prevent large particles of impurities (such as dead branches and leaves, duckweed, small fish and shrimp, etc.) from entering the cylinder body 41 while ensuring a certain amount of water intake.

[0029] Preferably, the connecting rod 2 is rotatably mounted at the bottom of the UAV body 1 (the connecting rod 2 can be hinged to the bottom of the UAV body 1 via a hinge ball, not shown in the figure). In this way, the connecting rod is always vertical under the action of gravity, reducing the impact of UAV attitude adjustment on it.

[0030] like Figure 2 , Figure 3As shown, in one embodiment, the push-pull rod 45 passes through the top of the cylinder 41 from the vent 42. A conical plug 452 is provided at the position of the push-pull rod 45 corresponding to the vent 42, which is used to block the vent 42 when the push-pull rod 45 moves upward to reset. This prevents sewage from entering the cylinder 41 through the vent 42 when the cylinder 41 is completely submerged below the water surface.

[0031] like Figure 2 , Figure 3 , Figure 6 , Figure 7 As shown, in one embodiment, the sampling container 4 on the tray 32 can be fixed to the tray 32 by various methods such as insertion, snap-fit, bolt connection, clamping, etc. However, in order to better and more conveniently pick up and put down the sampling container 4, this application adopts the following technical solution: The tray 32 has a groove 321 at the position corresponding to the cylinder 41. A slot 322 is horizontally formed on the side wall of the groove 321. One end of the slot 322 has a through groove 323 that extends out of the surface of the tray 32. A limiting block 47 is provided at the position corresponding to the through groove 323 on the cylinder 41. The limiting block 47 can enter the slot 322 through the through groove 323. Then, the cylinder 41 is rotated to move the limiting block 47 to the end of the slot 322 away from the through groove 323, thus completing the limiting with the slot 322.

[0032] Preferably, the slot 322 can be in the shape of a spiral arc, and rotating the cylinder body 41 causes the wall of the slot 322 of the limiting block 47 to abut and engage.

[0033] like Figure 3 , Figure 6 As shown, in one embodiment, the frame 31 is cylindrical with an opening facing downward at the position of the corresponding turntable 33. The turntable 33 is sealed to the inner wall of the frame 31 and can rotate relative to the frame 31. A gear ring 332 is provided on the top of the turntable 33, and a drive gear 35 that meshes with the gear ring 332 is provided at the output end of the power component 34.

[0034] In practice, the power component 34 is a motor, which is fixed inside the frame 31. Its power can come from its own battery or be connected to the power supply of the drone. The power component 34 drives the drive gear 35 to rotate. Through the meshing of the drive gear 35 and the gear ring 332, the turntable 33 is driven to rotate. At the same time, since the frame 31 is a cylindrical shape with the opening facing downwards, and the turntable 33 is sealed to the inner wall of the frame 31, sewage can be prevented from entering and corroding the drive gear 35, and the motor can be protected.

[0035] like Figure 3 , Figure 6As shown, in one embodiment, the tray 32 is provided with pivots 324 on both sides, and the tray 32 is mounted on the frame 31 by means of the pivots 324. The sampling container 4 is distributed on the upper and lower sides of the tray 32. The frame 31 is also equipped with a drive assembly 36 for driving the tray 32 to flip.

[0036] In practice, multiple sampling containers 4 are mirror-distributed on the upper and lower sides of the tray 32, thereby doubling the number of sampling containers 4 that the tray 32 can hold, greatly increasing the number of samplings that can be performed, and enabling multi-point, multiple sampling.

[0037] like Figure 3 , Figure 4 , Figure 5 As shown, in one embodiment, a connecting plate 37 is provided above the turntable 33, and a connecting shaft 333 is provided at the rotation center of the turntable 33. One end of the connecting shaft 333 passes through the connecting plate 37 and is provided with a first bevel gear 334. The drive assembly 36 includes a second bevel gear 361 meshing with a first bevel gear 334, a drive shaft 362 with one end connected to the second bevel gear 361 and the other end extending out of the frame 31, a first drive wheel 363 sleeved on the drive shaft 362, a second drive wheel 364 sleeved on a rotating shaft 324, a disc spring 365 located between the second drive wheel 364 and the rotating shaft 324, and a transmission accessory 366 connecting the first drive wheel 363 and the second drive wheel 364; the first bevel gear 334 can drive the second drive wheel 364 to rotate one revolution for each revolution. It also includes a limiting component 38, which prevents the tray 32 from flipping before the turntable 33 rotates once, and releases the limiting component after the turntable 33 rotates once, allowing the tray 32 to flip and re-limiting the flipped tray 32.

[0038] In practice, when the turntable 33 rotates one revolution, it means that all the sampling containers 4 on one side of the tray 32 have completed sampling. At this time, the tray 32 is flipped over to flip the empty sampling containers 4 up for sampling again. Specific operation: Before the turntable 33 rotates one revolution, the rotation of the turntable 33 drives the second transmission wheel 364 to rotate. Since there is a coil spring 365 between the second transmission wheel 364 and the rotating shaft 324, and the two ends of the coil spring 365 are connected to the second transmission wheel 364 and the rotating shaft 324 respectively, and the rotating shaft 324 is limited by the limiting component 38, the second transmission wheel 364 rotates while the rotating shaft 324 does not rotate. The coil spring 365 stores energy. After the turntable 33 rotates one revolution, the limiting component 38 first releases the limiting component on the tray 32, the coil spring 365 drives the rotating shaft 324 to flip, and then the limiting component 38 limits the tray 32 again.

[0039] Preferably, the first transmission wheel 363 and the second transmission wheel 364 can be pulleys or sprockets, and the transmission accessory 366 can be a transmission belt or a transmission chain.

[0040] Preferably, the connection between the connecting plate 37 and the frame 31 forms a closed space above the turntable 33, and the connecting shaft 333 is dynamically sealed to the connecting plate 37; the power component 34 is located within this closed space, and the output shaft of the power component 34 extends downward to the bottom of the connecting plate 37 and is dynamically sealed to the connecting plate 37; the drive shaft 362 is dynamically sealed to the frame 31. This further prevents sewage from entering the core components.

[0041] Preferably, one end of the rotating shaft 324 extends to the outside of the frame 31. The second transmission wheel 364 includes a transmission wheel body and a sleeve 367 located inside the transmission wheel body. The transmission wheel body is used to drive the sleeve 367 to rotate. The sleeve 367 is sleeved on the rotating shaft 324. The disc spring 365 is located between the sleeve 367 and the rotating shaft 324.

[0042] like Figure 5 , Figure 9 As shown, in one embodiment, the limiting component 38 includes a sliding sleeve 381 disposed on the left and right sides of the corresponding pivot 324 of the frame 31. A slider 382 is slidably disposed inside the sliding sleeve 381. A second elastic member 383 is disposed between the slider 382 and the sliding sleeve 381. The second elastic member 383 is used to push one end of the slider 382 out of the sliding sleeve 381 and out to the bottom of the tray 32. The sliding sleeve 381 has a through hole 3811 running from top to bottom. The slider 382 has a wedge-shaped groove 3821 running from top to bottom at the corresponding position of the through hole 3811. The frame 31 has a pressure rod 384 vertically sliding at the corresponding position of each through hole 3811. The pressure rod 384 can pass through the through hole 3811 from top to bottom and enter the wedge-shaped groove 3821 to contact the inclined surface inside the wedge-shaped groove 3821. Pressing down the pressure rod 384 can cause the bottom of the pressure rod 384 to abut against the inclined surface of the wedge-shaped groove 3821, causing the slider 382 to slide into the sliding sleeve 381 and move away from the bottom of the tray 32. It also includes a pressing component, which is used to press down the pressure rod 384 in sequence under the drive of the turntable 33, so that the sliders 382 located in the sliding sleeves 381 on both sides of the rotating shaft 324 are moved away from the bottom of the tray 32 in sequence.

[0043] In specific implementation, by setting sliders 382 on both sides of the rotating shaft 324 and extending the sliders 382 to the bottom of the tray 32, the flipping of the tray 32 can be restricted. When the sampling container 4 on the top of the tray 32 is completely filled with samples, the turntable 33 drives the squeezing component to press one of the pressure rods 384, causing the slider 382 on that side to move away from the bottom of the tray 32 (this slider 382 is located on the side where the tray 32 flips). At this time, the tray 32 flips under the action of the coil spring 365 until it flips to the bottom of the other slider 382 (at this time, the other slider 382 has not yet moved away from the bottom of the tray 32). 2. The rotation stops, and then the pressing component separates from the pressure rod 384. The corresponding slider 382 resets and extends back to the bottom of the tray 32. Then, the pressing component, driven by the turntable 33, presses down on another pressure rod 384, causing the slider 382 on that side to move away from the bottom of the tray 32. At this time, the tray 32 continues to rotate under the drive of the coil spring 365, completing a 180° rotation and being limited by the previously reset slider 382. Then, the turntable 33 continues to rotate, the pressing component separates from the pressure rod 384, and the corresponding slider 382 resets and extends back to the bottom of the tray 32, completing the action of the tray 32 rotating 180° and being re-limited.

[0044] Preferably, the second elastic element 383 is a spring.

[0045] like Figure 6 , Figure 8 As shown, in one embodiment, the pressing component includes a second pressing block 335 disposed at the bottom of the turntable 33. The second pressing block 335 is located at a position away from the rotation center of the turntable 33 and is wedge-shaped. The second pressing block 335 does not contact the push-pull rod 45 during the rotation of the turntable 33. The extrusion component also includes a lower pressing block 385 located below the turntable 33. One end of the lower pressing block 385 is located below the turntable 33, and the other end is connected to the pressure rod 384. When the turntable 33 rotates, it can drive the second pressing block 335 to press down the lower pressing block 385, causing the pressure rod 384 to move downward.

[0046] In specific implementation, the pressure rod 384 is located on the outside of the frame 31. One end of the lower pressure block 385 passes through the frame 31 and connects to the pressure rod 384. A clearance groove is provided on the frame 31 at the corresponding position of the lower pressure block 385 to allow the lower pressure block 385 to move up and down. The frame 31 is also provided with at least one limiting sleeve 311 sleeved on the outside of the pressure rod 384. The limiting sleeve 311 slides with the pressure rod 384 to guide the posture and sliding direction of the pressure rod 384. To better assist the pressure rod 384 in resetting, a return spring (not shown in the figure) can be provided between the pressure rod 384 and the limiting sleeve 311 or between the pressure rod 384 and the frame 31. The return spring assists the pressure rod 384 in resetting. Of course, the return spring can also be set in the clearance groove, so that the return spring is located between the clearance groove and the lower pressure block 385, thereby assisting the pressure rod 384 in resetting.

[0047] like Figure 5 As shown, in one embodiment, a liquid level sensor (not shown) is provided on the frame 31.

[0048] In a specific implementation, a sensor mounting base 39 is provided at the bottom of the frame 31, and the liquid level sensor is installed in the sensor mounting base 39 to detect the depth of the sampled liquid level.

[0049] It should be noted that this liquid level sensor has two functions. One is to detect the depth of the sampled liquid level. The other is that drones located on the water surface are easily affected by water reflection, which affects positioning accuracy and altitude accuracy. The practical use of the liquid level sensor can assist drones in positioning and prevent them from falling.

[0050] In one embodiment, the length of the connecting rod 2 is adjustable.

[0051] Preferably, the length of the connecting rod 2 can be adjusted manually in advance according to the target. Of course, a connecting rod 2 with an automatically adjustable length (such as an electric telescopic rod) can also be selected.

[0052] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0053] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0054] Additionally, "multiple" refers to two or more.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wastewater monitoring and sampling device based on an unmanned aerial vehicle (UAV), comprising the UAV body (1), characterized in that, A connecting rod (2) is provided at the bottom of the drone body (1), and a sampling component (3) is connected to the bottom end of the connecting rod (2). The sampling component (3) includes a frame (31), a tray (32) located in the frame (31), a turntable (33) rotatably set above the tray (32), a power component (34) for driving the turntable (33) to rotate, and multiple sampling containers (4) set on the tray (32) and located below the turntable (33). Multiple sampling containers (4) are arranged in a ring on a tray (32), with the center of the ring coaxial with the turntable (33). Each sampling container (4) includes a cylindrical body (41), with an exhaust port (42) at the top. A sliding plate (43) is installed inside the cylindrical body (41), which is slidably disposed inside the cylindrical body (41) and sealed to the cylindrical wall. A water inlet (44) is located on one side of the bottom of the cylindrical body (41). The sliding plate (43) inside the cylindrical body (41) can control the water inlet. The connection between the inlet (44) and the internal space of the cylinder (41) is established by a push-pull rod (45) on the slide plate (43), one end of which extends upward through the cylinder (41). A wedge-shaped first pressing block (331) is provided at the bottom of the turntable (33). The first pressing block (331) can rotate with the turntable (33) and press the push-pull rod (45) downward in sequence, so that the push-pull rod (45) drives the slide plate (43) to move downward, thereby connecting the inlet (44) with the internal space of the cylinder (41). It also includes a first elastic element (46) for driving the push-pull rod (45) to move upward and reset, so that the water inlet (44) is disconnected from the space inside the cylinder (41).

2. The wastewater monitoring and sampling device based on unmanned aerial vehicles (UAVs) according to claim 1, characterized in that, The push-pull rod (45) passes through the top of the cylinder body (41) from the exhaust port (42). A conical plug (452) is provided at the position of the push-pull rod (45) corresponding to the exhaust port (42), which is used to block the exhaust port (42) when the push-pull rod (45) moves upward to reset.

3. The wastewater monitoring and sampling device based on an unmanned aerial vehicle (UAV) according to claim 1 or 2, characterized in that, The tray (32) has a groove (321) at the position of the corresponding cylinder (41). A slot (322) is provided horizontally on the side wall of the groove (321). One end of the slot (322) has a through groove (323) that extends out of the surface of the tray (32). A limit block (47) is provided at the position of the corresponding through groove (323) on the cylinder (41). The limit block (47) can enter the slot (322) through the through groove (323). Then, the cylinder (41) is rotated to move the limit block (47) to the end of the slot (322) away from the through groove (323) and complete the limit with the slot (322).

4. The wastewater monitoring and sampling device based on an unmanned aerial vehicle (UAV) according to claim 1 or 2, characterized in that, The frame (31) is cylindrical with its corresponding turntable (33) facing downwards. The turntable (33) is sealed to the inner wall of the frame (31) and can rotate relative to the frame (31). A gear ring (332) is provided on the top of the turntable (33). The output end of the power component (34) is provided with a drive gear (35) that meshes with the gear ring (332).

5. The wastewater monitoring and sampling device based on an unmanned aerial vehicle (UAV) according to claim 1 or 2, characterized in that, The tray (32) is provided with a pivot (324) on both sides. The tray (32) can be flipped up and down on the frame (31) through the pivot (324). The sampling container (4) is distributed on the upper and lower sides of the tray (32). The frame (31) is also provided with a drive assembly (36) for driving the tray (32) to flip.

6. The wastewater monitoring and sampling device based on unmanned aerial vehicles according to claim 5, characterized in that, A connecting plate (37) is provided above the turntable (33), and a connecting shaft (333) is provided at the rotation center of the turntable (33). One end of the connecting shaft (333) passes through the connecting plate (37) and is provided with a first bevel gear (334). The drive assembly (36) includes a second bevel gear (361) meshing with a first bevel gear (334), a drive shaft (362) with one end connected to the second bevel gear (361) and the other end extending out of the frame (31), a first drive wheel (363) sleeved on the drive shaft (362), a second drive wheel (364) sleeved on the rotating shaft (324), a disc spring (365) located between the second drive wheel (364) and the rotating shaft (324), and a transmission accessory (366) connecting the first drive wheel (363) and the second drive wheel (364); the first bevel gear (334) can drive the second drive wheel (364) to rotate one revolution in one revolution; It also includes a limiting component (38) for preventing the tray (32) from flipping before the turntable (33) rotates once, and for releasing the limiting component after the turntable (33) rotates once, so that the tray (32) can flip and re-limiting the flipped tray (32).

7. The wastewater monitoring and sampling device based on unmanned aerial vehicles according to claim 6, characterized in that, The limiting component (38) includes a sliding sleeve (381) disposed on both sides of the corresponding pivot (324) of the frame (31). A slider (382) is slidably disposed inside the sliding sleeve (381). A second elastic element (383) is disposed between the slider (382) and the sliding sleeve (381). The second elastic element (383) is used to push one end of the slider (382) out of the sliding sleeve (381) and out to the bottom of the tray (32). The sliding sleeve (381) has a through hole (3811) running from top to bottom. The slider (382) has a wedge-shaped groove (3821) running from top to bottom at the position of the corresponding through hole (3811). The frame (31) has a pressure rod (384) vertically sliding at the position of each through hole (3811). The pressure rod (384) can pass through the through hole (3811) from top to bottom and enter the wedge-shaped groove (3821) to contact the inclined surface inside the wedge-shaped groove (3821). Pressing down the pressure rod (384) can make the bottom of the pressure rod (384) abut against the inclined surface of the wedge-shaped groove (3821), causing the slider (382) to slide into the inside of the sliding sleeve (381) and move away from the bottom of the tray (32). It also includes a pressing component, which is used to press down the pressure rod (384) in sequence under the drive of the turntable (33), so that the slider (382) located in the sliding sleeve (381) on both sides of the rotating shaft (324) moves away from the bottom of the tray (32) in sequence.

8. The wastewater monitoring and sampling device based on unmanned aerial vehicles according to claim 7, characterized in that, The pressing component includes a second pressing block (335) disposed at the bottom of the turntable (33). The second pressing block (335) is located at a position away from the rotation center of the turntable (33) and is wedge-shaped. The second pressing block (335) does not contact the push-pull rod (45) during the rotation of the turntable (33). The pressing component also includes a pressing block (385) located below the turntable (33). One end of the pressing block (385) is located below the turntable (33), and the other end is connected to the pressing rod (384). When the turntable (33) rotates, it can drive the second pressing block (335) to press down the pressing block (385), so that the pressing rod (384) moves downward.

9. The wastewater monitoring and sampling device based on an unmanned aerial vehicle (UAV) according to claim 1 or 2, characterized in that, The frame (31) is equipped with a liquid level sensor to detect the depth of the sampled liquid level and to assist the UAV body (1) in positioning.

10. The wastewater monitoring and sampling device based on an unmanned aerial vehicle (UAV) according to claim 1 or 2, characterized in that, The length of the connecting rod (2) is adjustable.

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