An unmanned aerial vehicle-based real-time water quality detection device

Abstract

The present application provides a real-time water quality detection device based on a drone, which solves the technical problems of the existing water quality detection device based on a drone being large in volume and weight and having low detection accuracy; it includes a pipe retractor for retracting and extending a water intake pipe; it further includes: a buffer, which is provided with a first water inlet, a first water outlet communicated with the water intake pipe at the bottom, and a waste water outlet at the top; a plurality of buffer chambers that are nested inside and outside and have openings at the top are provided in the inner cavity, the first water inlet and the waste water outlet correspond to the innermost buffer chamber, and the first water outlet corresponds to the outermost buffer chamber; and a flow detector with a flow cavity inside, a second water inlet communicated with the first water outlet is provided in the middle of the bottom, and a second water outlet is provided at the top edge; detection sensors are provided in the flow cavity. The present application is widely used in the technical field of drone water quality detection.

Description

Technical Field

[0001] The present application relates to a water quality detection device, and more specifically, to a real-time water quality detection device based on an unmanned aerial vehicle (UAV). Background Art

[0002] With the rapid economic development and the acceleration of the urbanization process, affected by human activities, the problem of water body pollution has become increasingly serious, posing a serious threat to human health. Water quality monitoring and detection are important means to prevent and control water body pollution. At present, water quality detection mainly adopts methods such as laboratory detection, on-site detection with portable equipment, and unmanned ship detection. However, such detection methods are greatly affected by the complex terrain conditions and geographical scope limitations during water sample collection or on-site detection, and it is impossible to achieve water quality detection in complex terrains and wider areas.

[0003] In recent years, the emerging UAV water quality detection technology, by carrying sampling or detection devices on UAVs, can sample and detect in complex environments or places where unmanned ships are difficult to reach, and has received increasing attention in the field of water quality detection. When implementing detection, it is mostly adopted that the UAV carries a detection device and immerses the detection device underwater directly through a floating platform or a retractable suspension rope for detection, or uses a peristaltic pump to suck the water sample into the detection device for static detection. Since the detection device is an integrated equipment of multiple sensors, with a large volume and weight, when the UAV is suspended for detection, the center of gravity is unstable, air bubbles are easily generated, which easily causes poor stability of the detection data. Moreover, when the dissolved oxygen is statically detected by sucking the water body into the detection device, the data accuracy is relatively low, and the detection result is closer to the actual situation in the water flow state. Summary of the Invention

[0004] In order to solve the problems of large volume, large weight and low detection accuracy of the existing UAV-based water quality detection device, the technical solution adopted in the present application is: to provide a real-time water quality detection device based on an UAV, including a pipe retractor for retracting and extending a water intake pipe; and further including:

[0005] A buffer, having a first water inlet, a first water outlet communicated with the water intake pipe at the bottom, and a waste water outlet at the top; a plurality of buffer chambers which are nested inside and outside and have open tops are arranged in the inner cavity, the first water inlet and the waste water outlet correspond to the innermost buffer chamber, and the first water outlet corresponds to the outermost buffer chamber; and

[0006] A flow detector with a flow-through cavity, having a second water inlet communicated with the first water outlet in the middle of the bottom, and a second water outlet at the top edge; a detection sensor is arranged in the flow-through cavity.

[0007] Preferably, the plurality of buffer chambers are formed by a plurality of buffer cylinders arranged at intervals from the inside to the outside, and there is an overflow space between the top of each buffer cylinder and the top of the buffer.

[0008] Preferably, the bottom surface of the inner cavity of the buffer is low in the middle and high around, and flow ports are provided at the bottom of each buffer cylinder; the flow ports of adjacent buffer cylinders are staggered.

[0009] Preferably, the detection sensor includes one or a combination of a temperature sensor, a PH sensor, a dissolved oxygen sensor, a conductivity sensor, and a turbidity sensor.

[0010] Preferably, the bottom surface of the flow cavity is an arc-shaped surface that is low in the middle and high around or a spiral rising structure.

[0011] Preferably, a water pump capable of rotating forward and backward is further connected between the water intake pipe and the first water inlet of the buffer.

[0012] Preferably, the pipe reel includes a turntable and a driving motor. One axial end of the turntable is connected to the driving motor, and a passage for allowing the water intake pipe to enter and exit is provided at the other axial end of the turntable; the turntable includes a turntable body for winding the water intake pipe and limiting plates provided at both ends of the turntable body, and a pipe receiving port communicating with the passage is provided on the turntable body.

[0013] Preferably, the axial length of the turntable body is greater than the outer diameter of the water intake pipe and less than twice the outer diameter of the water intake pipe.

[0014] Preferably, a guiding assembly is provided below the pipe reel. The guiding assembly includes a fixing frame and at least two rollers, and the two rollers are rotatably connected to the fixing frame; annular grooves matching with the water intake pipe are provided on the surfaces of the two rollers.

[0015] Preferably, a filter is connected to the free end of the water intake pipe; a filter screen is provided inside the filter, and the upper end of the filter is a conical structure.

[0016] Advantages of the present invention: On the one hand, a buffer and a flow detector are added. Water enters the buffer through the sampling pipe, and after the water pressure is balanced by several buffer cavities of the buffer, it gently flows into the flow detector for detection. A second water outlet is provided at the top edge of the flow detector, and the water flows in and out, maintaining a flowing state, realizing dynamic real-time detection of water quality, and having high detection accuracy. On the other hand, the structures of all components are simple. The pipe reel reduces the setting of the pipe management device, and at the same time limits the axial dimension of the turntable body of the pipe reel, which not only reduces the volume and weight, but also avoids the water intake pipe from being wound and knotted, thus affecting the detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1Schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 Schematic diagram of the three-dimensional structure of the present invention (removing the upper shell and the lower shell);

[0020] Figure 3 is Figure 2 top view structure diagram of;

[0021] Figure 4 Longitudinal sectional view of the buffer;

[0022] Figure 5 Cross-sectional view of the buffer;

[0023] Figure 6 Longitudinal sectional view of the flow detector;

[0024] Figure 7 Top view structure diagram of the pipe reel;

[0025] Figure 8 is Figure 7 A - A sectional view of;

[0026] Figure 9 Schematic diagram of the guide component structure;

[0027] Figure 10 Graph of the change of water quality PH detection data with time with or without a buffer;

[0028] Figure 11 Graph of the change of water quality conductivity detection data with time with or without a buffer;

[0029] Figure 12 Graph of the change of water quality dissolved oxygen detection data with time with or without a buffer;

[0030] Figure 13 Graph of the change of water quality temperature detection data with time with or without a buffer.

[0031] Explanation of symbols in the figure:

[0032] 1. Water intake pipe; 2. Pipe reel; 3. Buffer; 4. First water inlet; 5. First water outlet; 6. Waste water outlet; 7. Buffer chamber; 8. Flow chamber; 9. Flow detector; 10. Second water inlet; 11. Second water outlet; 12. Detection sensor; 13. Buffer cylinder; 14. Flow port; 15. Water channel; 16. Leakage hole; 17. Water pump; 18. Mounting plate; 19. Upper shell; 20. Lower shell; 21. Suspension rod; 22. Turntable; 23. Driving motor; 24. Passage; 25. Turntable body; 26. Limiting plate; 27. Pipe receiving port; 28. Induction block; 29. Photoelectric induction switch; 30. Guide assembly; 31. Fixed frame; 32. Roller; 33. Annular groove; 34. Filter; 35. Controller. Detailed implementation manners

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer and more understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0034] It should be noted that the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0035] The real-time water quality detection device based on an unmanned aerial vehicle provided by the embodiments of the present application will now be described.

[0036] Please refer to Figure 2 , Figure 3 , Figure 4 and Figure 6 , which are schematic structural diagrams of the real-time water quality detection device based on an unmanned aerial vehicle. The real-time water quality detection device based on an unmanned aerial vehicle includes: a pipe reel 2 for retracting and extending a water intake pipe 1; a buffer 3 having a first water inlet 4 and a first water outlet 5 communicated with the water intake pipe 1 at the bottom and a waste water outlet 6 at the top; a plurality of buffer chambers 7 nested inside and outside with an open top in the inner cavity, the first water inlet 4 and the waste water outlet 6 corresponding to the innermost buffer chamber 7, and the first water outlet 5 corresponding to the outermost buffer chamber 7; and a flow detector 9 with a flow chamber 8 inside, having a second water inlet 10 communicated with the first water outlet 5 in the middle at the bottom and a second water outlet 11 at the top edge; a detection sensor 12 is provided in the flow chamber 8. Among them, a check valve is usually provided at the waste water outlet 6 to prevent backflow.

[0037] During operation, the pipe reel 2 controls the lowering of the water intake pipe 1 to draw water. The water flow is introduced into the innermost buffer chamber 7 of the buffer 3 through the first water inlet 4. If the water flow pressure is too high, part of the water will directly gush out from the waste water outlet 6 at the top to relieve the water flow pressure. The remaining water overflows from the top opening of the inner buffer chamber 7 to the outer buffer chamber 7. When the outer buffer chamber 7 is full, it overflows to its outer buffer chamber 7. In this way, the pressure is relieved through several buffer chambers 7. Finally, the water gently flows into the second water inlet 10 of the flow detector 9 from the bottom of the outermost buffer chamber 7, gradually fills the flow chamber 8 from bottom to top, and then flows out from the second water outlet 11 at the top edge. After flowing for about 1 minute, each chamber is fully rinsed, and the detection sensor 12 starts to detect. On the one hand, it effectively prevents impurities from adhering to the last detected sample and improves the detection accuracy. On the other hand, during the detection process, the water flow always has both inflow and outflow, realizing dynamic real-time detection, and the detection result is accurate.

[0038] Please refer to 4, Figure 5 , in one embodiment, several buffer chambers 7 are formed by arranging several buffer cylinders 13 at intervals from inside to outside. Specifically, a buffer chamber 7 is formed between adjacent buffer cylinders 13. The innermost buffer cylinder 13 forms a buffer chamber 7 by itself, and the outermost buffer cylinder 13 and the inner wall of the buffer 3 form a buffer chamber 7. Regarding the shape of the buffer cylinder 13, its cross-section can be any shape, preferably circular, which is more conducive to relieving the water flow pressure. Further, to help the water flow complete the overflow action at the top of each buffer chamber 7, there is an overflow space between the top of each buffer cylinder 13 and the top of the buffer 3.

[0039] To reduce the impact on the next detection, after each detection is completed, all the water in the chamber needs to be drained. The bottom surface of the inner cavity of the buffer 3 is low in the middle and high around, which is convenient for the water around to flow back to the middle; and a flow port 14 is provided at the bottom of each buffer cylinder 13. To relieve the water flow pressure and prevent the water flow from directly entering the outermost buffer chamber 7 from the flow port 14 of the innermost buffer chamber 7, the flow ports 14 of adjacent buffer cylinders 13 are staggered. The number of flow ports 14 is not limited. In one embodiment, four flow ports 14 are evenly distributed at the bottom of each buffer cylinder 13.

[0040] Please refer to Figure 6 , in one embodiment, the detection sensor 12 includes one or a combination of a temperature sensor, a PH sensor, a dissolved oxygen sensor, a conductivity sensor, and a turbidity sensor, which are respectively used to detect the temperature, PH, dissolved oxygen content, conductivity, and turbidity of the water quality.

[0041] Further, to avoid the bubbles inhaled by the water intake pipe or the bubbles generated by the shaking of the drone from affecting the detection result. The bottom surface of the flow chamber 8 is an arc surface that is low in the middle and high around (see Figure 6) or a spiral rising structure. If there are air bubbles in the water flow, the air bubbles can rise from the bottom of the flow-through cavity 8 along the arc-shaped or spiral wall to the top edge and flow out from the second water outlet 11 along with the water flow. At the same time, the detection sensor 12 is arranged in the middle of the flow-through cavity 8 to avoid contacting the rising air bubbles.

[0042] The second water inlet 10 of the flow-through detector 9 can be directly opened at the bottom, or can be opened at the top and connected to the bottom through the water channel 15, and a water leakage hole 16 is opened at a position near the bottom. The choice between the two methods depends on the specific pipeline design requirements. In one embodiment, the latter setting method of the second water inlet 10 is selected, and the bottom of the flow-through detector 9 is exposed outside the device, and the pipeline and the detection sensor 12 are both arranged above the flow-through detector 9. At this time, the outer surface of the water channel 15 is approximately an inverted cone, its side wall is an inwardly concave arc surface, and the upper end extends to the edge position of the flow-through detector 9. If air bubbles enter from the water leakage hole 16, they can also rise along the inwardly concave arc surface and finally flow out from the second water outlet 11 at the top edge.

[0043] To provide power for water intake and drainage, please refer to Figure 2 , a pump 17 capable of positive and reverse rotation, preferably a peristaltic pump, is also connected between the water intake pipe 1 and the first water inlet 4 of the buffer 3.

[0044] In one embodiment, to combine the water quality detection device with a drone, please refer to Figure 1 , Figure 2 , each component is installed and fixed on the mounting plate 18, an upper shell 19 is connected above the mounting plate 18, and a lower shell 20 is connected below the mounting plate 18; the mounting plate 18 is provided with a plurality of suspension rods 21 for connecting with the drone, and the upper shell 19 and the lower shell 20 are used for protection. Specifically, the mounting plate 18 is provided with a plurality of mounting positions, the pipe reel 2, the pump 17, the buffer 3 and the controller 35 are installed above the mounting plate 18, the flow-through detector 9 is installed below the mounting plate 18, and part of it is exposed outside the lower shell 20. The lower shell 20 is also provided with an opening allowing the water intake pipe 1 to move up and down. A camera assembly (not shown in the figure) can also be installed at the bottom of the lower shell 20 to facilitate observing the detection position. Through the remote transmission of pictures or video information by the camera assembly, the sampling location is determined, a sampling instruction is sent to the controller 35, the controller 35 controls each component to start water intake and detection actions, and after the detection is completed, the pump 17 is controlled to reverse to drain the water sample.

[0045] Please refer to Figure 7 , Figure 8, Regarding the pipe reel 2, in one embodiment, the pipe reel 2 includes a turntable 22 rotatably connected to the mounting plate 18 and a driving motor 23. One axial end of the turntable 22 is connected to the driving motor 23, and the other axial end of the turntable 22 is provided with a passage 24 allowing the water intake pipe 1 to enter and exit. The turntable 22 includes a turntable body 25 for winding the water intake pipe 1 and limiting plates 26 provided at both ends of the turntable body 25. A pipe receiving port 27 communicating with the passage 24 is provided on the turntable body 25. When in use, the water intake pipe 1 enters the passage 24 inside the turntable body 25 from the axial end of the turntable 22, then extends out from the pipe receiving port 27 on the turntable body 25 and winds around the turntable body 25, and its fixed end is connected to the water pump 17.

[0046] Further, a plurality of induction blocks 28 are circumferentially and uniformly distributed on the end face of the limiting plate 26 far from the driving motor 23, and a photoelectric induction switch 29 cooperating with the induction blocks 28 is provided on the mounting plate 18. The two cooperate to accurately count the winding and unwinding length of the water intake pipe 1.

[0047] To reduce the load of the unmanned aerial vehicle, the pipe reel 2 is not provided with a pipe arranging device. However, to ensure the accuracy of the detection data, the sampling water needs to remain flowing, which requires that the water intake pipe 1 does not get knotted, stuck, etc. Therefore, the axial length of the turntable body 25 is greater than the outer diameter of the water intake pipe 1 and less than twice the outer diameter of the water intake pipe 1. Preferably, the axial length of the turntable body 25 is equal to 1.5 times the outer diameter of the water intake pipe 1.

[0048] To avoid the water intake pipe 1 colliding with, rubbing against, or even getting stuck on the lower shell 20 during the winding and unwinding process, please refer to Figure 1 、 Figure 9 , the lower shell 20 is provided with a guiding assembly 30. The guiding assembly 30 includes a fixing frame 31 and at least two rollers 32. The two rollers 32 are rotatably connected to the fixing frame 31; annular grooves 33 cooperating with the water intake pipe 1 are provided on the surfaces of the two rollers 32. When the water intake pipe 1 is wound and unwound, it can move along between the two annular grooves 33. The rollers 32 not only play a guiding role but also can reduce friction.

[0049] In addition, a filter 34 is connected to the free end of the water intake pipe 1. A filter screen is provided inside the filter 34 to block impurities in the water. The upper end of the filter 34 is of a conical structure to avoid being entangled by weeds and other sundries, which may hinder the recovery of the water intake pipe 1.

[0050] On the one hand, a buffer 3 and a flow detector 9 are added. Water enters the buffer 3 through the water intake pipe 1. After the water pressure is balanced by several buffer chambers 7 of the buffer 3, it gently flows into the flow detector 9 for detection. A second water outlet 11 is provided at the top edge of the flow detector 9. The water flows in and out, maintaining a flowing state, realizing dynamic real-time detection of water quality, and having high detection accuracy. On the other hand, the structures of all components are simple. The pipe reel 2 reduces the setting of the pipe arrangement device, and at the same time limits the axial dimension of the turntable body 25 of the pipe reel 2, which not only reduces the volume and weight, but also avoids the water intake pipe 1 from being wound and knotted, thus affecting the detection result.

[0051] Please refer to Figures 10 to 13 , which is a comparison chart of pH detection, conductivity detection, dissolved oxygen detection, and temperature detection of the same water quality with and without a buffer. It can be clearly seen that in the case of having a buffer, the fluctuations of each item of data are smaller, and there is no change with the passage of time, and the overall data stability is better.

[0052] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A real-time water quality detection device based on a drone, comprising a pipe retractor for retracting and extending a water intake pipe; characterized in that: Further comprising: A buffer, having a first water inlet and a first water outlet communicated with the water intake pipe at the bottom, and a waste water outlet at the top; The inner cavity is provided with a plurality of buffer cavities which are nested inside and outside and have openings at the top. The first water inlet and the waste water outlet correspond to the innermost buffer cavity, and the first water outlet corresponds to the outermost buffer cavity; And A flow detector with a flow cavity inside, having a second water inlet communicated with the first water outlet in the middle of the bottom, and a second water outlet at the edge of the top; a detection sensor is arranged in the flow cavity; The plurality of buffer cavities are formed by a plurality of buffer cylinders arranged at intervals from inside to outside, and there is an overflow space between the top of each buffer cylinder and the top of the buffer; The middle part of the inner cavity bottom surface of the buffer is low and the periphery is high, and the bottom of each buffer cylinder is provided with a flow port; the flow ports of adjacent buffer cylinders are staggered; The bottom surface of the flow cavity is an arc surface or a spiral rising structure with the middle low and the periphery high; A water pump capable of rotating forward and backward is further connected between the water intake pipe and the first water inlet of the buffer; 2. The real-time water quality detection device based on a drone according to claim 1, characterized in that: The detection sensor includes one or a combination of a temperature sensor, a PH sensor, a dissolved oxygen sensor, a conductivity sensor, and a turbidity sensor; 3. The real-time water quality detection device based on an unmanned aerial vehicle according to claim 1, characterized in that: The pipe receiver includes a turntable and a driving motor. One axial end of the turntable is connected to the driving motor, and the other axial end of the turntable is provided with a passage for the water intake pipe to enter and exit; the turntable includes a turntable body for winding the water intake pipe and limiting plates arranged at both ends of the turntable body, and a pipe receiving port communicated with the passage is arranged on the turntable body; 4. The real-time water quality detection device based on a drone according to claim 3, characterized in that: The axial length of the turntable body is greater than the outer diameter of the water intake pipe and less than twice the outer diameter of the water intake pipe; 5. The real-time water quality detection device based on an unmanned aerial vehicle according to claim 1, characterized in that: A guiding assembly is arranged below the pipe receiver. The guiding assembly includes a fixing frame and at least two rollers, and the two rollers are rotatably connected to the fixing frame; annular grooves matched with the water intake pipe are arranged on the surfaces of the two rollers; 6. The real-time water quality detection device based on an unmanned aerial vehicle according to claim 1, wherein: The free end of the water intake pipe is connected with a filter; a filter screen is arranged inside the filter, and the upper end of the filter is a conical structure.

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