Water flow velocity measuring device based on unmanned aerial vehicle

Abstract

The invention relates to the technical field of water flow velocity measurement, in particular to an unmanned aerial vehicle-based water flow velocity measurement device, which comprises an unmanned aerial vehicle, a connecting piece fixedly mounted on the unmanned aerial vehicle, a fixing piece fixedly mounted on the connecting piece, an operation box fixedly mounted at the bottom of the fixing piece, and a positioning plate fixedly mounted on the inner side wall of the operation box. A water surface floating assembly and a water surface positioning assembly are arranged on the operation box. According to the invention, through cooperative use of the foam buoyancy rod, the underwater propeller and the rotary cup type flow velocity meter in contact with a water body, the device can measure the flow velocity by parking the unmanned aerial vehicle on the water surface, so that errors easily caused by factors such as air, temperature and humidity in measurement in a non-contact measurement mode are effectively avoided; meanwhile, the situation that detection is inaccurate due to the fact that the water body in the water area is turbid and contains a large number of floating objects in a non-contact measurement mode can be avoided.

Description

Technical Field

[0001] The invention relates to the technical field of water flow velocity measurement, and in particular to a water flow velocity measurement device based on an unmanned aerial vehicle. Background Art

[0002] The water conditions and flow data of rivers, lakes and reservoirs play an extremely important role, involving various aspects such as flood control safety, hydrological and water conservancy calculations, and water resources evaluation. Therefore, river flow testing is an important part of hydrological work, and a large amount of manpower and financial resources are required to conduct testing every year.

[0003] In the existing technology, most of them use drones equipped with high-precision radar velocity monitoring equipment to obtain water flow velocity data in a non-contact manner. This type of drone non-contact water flow velocity measurement has the advantages of improved safety and efficiency, high precision and real-time performance, flexibility and adaptability, as well as intelligence and automation. These advantages make drones have broad application prospects and important practical value in the field of water flow velocity measurement.

[0004] However, this non-contact measurement method is susceptible to errors caused by factors such as air, temperature, and humidity, resulting in abnormal measurement accuracy. At the same time, when the water in the measurement area is turbid and contains a large amount of floating objects, the non-contact measurement will be disturbed, resulting in inaccurate measurement accuracy. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides a water flow velocity measuring device based on an unmanned aerial vehicle.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a water flow velocity measuring device based on a drone, comprising a drone, a connecting piece is fixedly installed on the drone, a fixing piece is fixedly installed on the connecting piece, a work box is fixedly installed on the bottom of the fixing piece, a positioning plate is fixedly installed on the inner side wall of the work box, a water surface floating component and a water surface positioning component are arranged on the work box, the water surface floating component and the water surface positioning component are located above the positioning plate, an inflow water flow velocity detection mechanism is arranged on the work box below the positioning plate, and a driving mechanism is arranged on the work box, and the driving mechanism is used to drive the inflow water flow velocity detection mechanism, the water surface floating component and the water surface positioning component to operate synchronously;

[0007] The water surface floating assembly includes a support block, a driven gear, an auxiliary gear, a driving gear, a second movable opening, a support plate, an elastic buckle and a foam buoyancy rod. The second movable opening is opened on the two side walls of the working box at the top of the working box. The front and rear inner walls of the second movable opening are rotatably mounted with driven gears, the corresponding side walls of the driven gear are fixedly mounted with a support plate, the bottom end of the support plate is fixedly mounted with an elastic buckle, and a foam buoyancy rod is fixedly mounted on the elastic buckle. The front and rear inner walls of the working box are rotatably mounted with auxiliary gears and driving gears. The number of auxiliary gears and driving gears is two groups and they are symmetrically arranged. The auxiliary gears and the driving gears are meshed, the auxiliary gears are meshed with the driven gears, and the driving mechanism drives the two groups of driving gears to rotate;

[0008] The water surface positioning component includes a first movable opening, both side walls of the working box are provided with the first movable opening, the positioning plate is located in the middle of the first movable opening, an underwater propeller is slidably placed in the first movable opening, a threaded rod is rotatably installed on the front and rear inner walls of the working box, and an independent gear is fixedly installed on the front and rear ends of the threaded rod, and the driving mechanism drives the independent gear to rotate, and two groups of symmetrically arranged movable blocks are threadedly installed on the threaded rod, and the built-in threads of the two groups of movable blocks are arranged in opposite directions, and the second connecting rods are hingedly installed on the two side walls of the two groups of movable blocks in turn, and the second connecting rods located on the same side of the movable blocks are cross-hingedly connected, and a second sliding groove is provided on the outer side wall of the underwater propeller, and a second sliding rod is fixedly installed on the front and rear inner walls of the second sliding groove, and a second sliding block is built in the second sliding groove, and the number of the second sliding blocks is two groups and they are slidably connected to the second sliding rod, and the two groups of second sliding blocks are hingedly connected to the free ends of the two groups of second connecting rods in turn;

[0009] The inflow water flow velocity detection mechanism includes a mounting rod, a first slide groove is opened on the top of the mounting rod, a first slide rod is fixedly installed on the front and rear inner walls of the first slide groove, a first slider is built in the first slide groove, there are two groups of first sliders and they are slidably connected with the first slide rod, the two groups of first sliders are located at the front and rear inner walls of the first slide groove in sequence, a first connecting rod is hingedly installed on the top of the first slider in sequence, the two groups of first connecting rods are cross-hingedly connected, the free ends of the two groups of first connecting rods are hingedly connected with the two groups of movable blocks in sequence, and a cup flow meter is fixedly installed in the middle of the bottom of the mounting rod.

[0010] As a preferred technical solution of the present invention, the driving mechanism includes a fixed plate, a motor, a threaded screw, a limit rod, a limit frame, a driving frame and a driving rod. A fixed plate is fixedly installed in the center of the fixed piece, a motor is fixedly installed on the top of the fixed plate, a threaded screw is rotatably installed in the center of the bottom of the fixed plate, an output end of the motor longitudinally penetrates the fixed plate and is fixedly connected to the threaded screw, a limit rod is fixedly installed on the bottom of the fixed plate at the front and rear sides of the threaded screw, a driving frame is sleeved and installed on the threaded screw and the limit rod, the driving frame is threadedly connected to the threaded screw, the driving frame is slidably connected to the limit rod, the driving frame is arranged in an inverted U-shaped structure, the front and rear ends of the driving frame are located at the interval of two sets of driving gears, the two side walls of the front and rear ends of the driving frame are installed with teeth meshing with the driving gears, the driving rod is fixedly installed at the bottom of the front and rear ends of the driving frame, and the outer side wall of the driving rod is provided with teeth meshing with the independent gear.

[0011] As a preferred technical solution of the present invention, support blocks are fixedly installed on the two side walls of the working box just above the second movable opening, the support plate is arranged in a hollow structure and the support plate is arranged horizontally with the water surface, and the bottom of the support block is arranged in contact with the outer wall of the support plate.

[0012] As a preferred technical solution of the present invention, a limit frame is fixedly installed on the front and rear inner walls of the working box. The limit frame is in an L-shaped structure and is arranged in close contact with the outer side wall of the driving rod.

[0013] As a preferred technical solution of the present invention, a third slide groove is provided on the positioning plate, guide rods are fixedly installed on the inner walls on both sides of the third slide groove, a third slider is built into the third slide groove, the third slider is sleeved on the guide rod and slidably connected to the guide rod, an auxiliary plate is fixedly installed on the bottom of the third slider, and the outer wall of the auxiliary plate is fixedly connected to the underwater thruster.

[0014] As a preferred technical solution of the present invention, an opening for the movement of the driving frame is provided on the top of the working box, the front and rear side walls of the driving frame are fitted with the front and rear inner walls of the working box, the top of the driving frame is initially located outside the working box, the bottom ends of the limit rod and the threaded screw are located on the same horizontal line with the center of the driving gear, and the bottoms of the limit rod and the threaded screw are fixedly installed with limit plates.

[0015] As a preferred technical solution of the present invention, the outer side of the bottom of the second movable opening is arranged in an inclined structure, and the support plate is arranged in a storage state and an inclined structure, the two groups of support plates in the storage state are arranged in an eight-shaped structure, and the bottom of the work box is arranged in an open structure.

[0016] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0017] 1. In the present invention, by using a foam buoyancy rod, an underwater propeller and a cup flowmeter in contact with the water body, the device can measure the flow rate by parking the drone on the water surface, effectively avoiding the non-contact measurement method being susceptible to errors caused by factors such as air, temperature, and humidity during measurement, resulting in abnormal measurement accuracy. At the same time, it can also avoid the situation where the non-contact measurement method is inaccurate due to turbid water bodies and a large amount of floating objects.

[0018] 2. In the present invention, by setting an underwater propeller, when the UAV is parked on the water surface, the device can drive the underwater propeller to counter the direction of the water flow, thereby preventing the UAV from moving with the water flow and causing abnormal detection by the cup flow meter. At the same time, it can prevent the UAV from moving with the water flow to other areas of the water area during measurement, causing the UAV to leave the signal area.

[0019] 3. In the present invention, by setting up the use of auxiliary plates and positioning plates, the extension stability of the underwater propeller can be effectively guaranteed, and the underwater propeller can be prevented from tilting after being extended, which makes it impossible to store the underwater propeller. At the same time, the work box with an open bottom can be more convenient after the drone leaves the water surface, and the work box can be prevented from being unable to be extracted after water enters it. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the side structure of the processing box of the present invention;

[0022] Figure 3 It is a structural schematic diagram of the driving mechanism of the present invention;

[0023] Figure 4 It is a structural schematic diagram of the inlet water flow velocity detection mechanism of the present invention;

[0024] Figure 5 It is a structural schematic diagram of the water surface positioning assembly of the present invention;

[0025] Figure 6 It is a side view schematic diagram of the underwater propeller of the present invention;

[0026] Figure 7 It is a schematic diagram of the position structure of the third sliding block of the present invention;

[0027] Figure 8 It is a schematic diagram of the enlarged structure of part A of the present invention.

[0028] Among them: 1. UAV; 2. Connector; 3. Operation box; 4. Support plate; 5. Elastic buckle; 6. Foam buoyancy rod; 7. Motor; 8. Fixing piece; 9. Support block; 10. First movable opening; 11. Second movable opening; 12. Fixing plate; 13. Threaded screw; 14. Underwater thruster; 15. Limit rod; 16. Drive frame; 17. Drive rod; 18. Driven gear; 19. Auxiliary gear; 20. Driving gear; 21. First connecting rod; 22. First sliding rod; 23. Rotary cup flow meter; 24. First slider; 25. First slide groove; 26. Second connecting rod; 27. Threaded rod; 28. Movable block; 29. ​​Second slider; 30. Auxiliary plate; 31. Second slide rod; 32. Second slide groove; 33. Positioning plate; 34. Third slider; 35. Second slide groove; 36. Limit frame; 37. Independent gear; 38. Mounting rod. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work all belong to the protection scope of the present invention. The experimental methods in the following embodiments, unless otherwise specified, are conventional methods, and the materials, reagents, etc. used in the following embodiments, unless otherwise specified, can all be obtained from commercial channels.

[0030] Example: Figure 1-8 As shown, a water flow velocity measuring device based on a drone comprises a drone 1, a connecting member 2 is fixedly installed on the drone 1, a fixing member 8 is fixedly installed on the connecting member 2, a work box 3 is fixedly installed on the bottom of the fixing member 8, a positioning plate 33 is fixedly installed on the inner side wall of the work box 3, a water surface floating component and a water surface positioning component are arranged on the work box 3, the water surface floating component and the water surface positioning component are located above the positioning plate 33, an inflow water flow velocity detection mechanism is arranged on the work box 3 below the positioning plate 33, and a driving mechanism is arranged on the work box 3, and the driving mechanism is used to drive the inflow water flow velocity detection mechanism, the water surface floating component and the water surface positioning component to operate synchronously;

[0031] In actual use, when it is necessary to use the drone 1 to measure the water flow velocity in the area, the user will preferably install the work box 3 on the bottom of the drone 1. At this time, the stored surface floating components can be used as the supporting legs of the drone 1. At this time, the drone 1 is driven into the regional waters. At this time, the driving structure is started to drive the water flow velocity detection mechanism, the water surface floating component and the water surface positioning component at the same time, so that the drone 1 can be parked and floated on the water surface. At this time, the water surface positioning component operates, so that the drone 1 will not flow with the water flow, and will be positioned in the initial parking and floating position. At this time, the water flow velocity detection mechanism detects the water flow velocity data and provides feedback.

[0032] The water surface floating assembly includes a support block 9, a driven gear 18, an auxiliary gear 19, a driving gear 20, a second movable opening 11, a support plate 4, an elastic buckle 5 and a foam buoyancy rod 6. The two side walls of the work box 3 are located at the top of the work box 3 and are provided with a second movable opening 11. The front and rear inner walls of the second movable opening 11 are rotatably mounted with driven gears 18. The corresponding side wall of the driven gear 18 is fixedly mounted with a support plate 4. The bottom end of the support plate 4 is fixedly mounted with an elastic buckle 5. The foam buoyancy rod 6 is fixedly mounted on the elastic buckle 5. The front and rear inner walls of the work box 3 are rotatably mounted with auxiliary gears 19 and driving gears 20. The number of auxiliary gears 19 and driving gears 20 are both two groups and are symmetrically arranged. The auxiliary gears 19 and the driving gears 20 are meshed, and the auxiliary gears 19 are meshed with the driven gears 18. The driving mechanism drives the two groups of driving gears 20 to rotate;

[0033] The driving mechanism drives the active gear 20 to rotate, and the active gear 20 drives the auxiliary gear 19 and the driven gear 18 to rotate. At this time, the two sets of support plates 4 begin to unfold until the support plates 4 can be parallel to the water surface. At this time, when the drone 1 falls on the water surface, the unfolded support plates 4 and the foam buoyancy rods 6 can float the drone 1 on the water surface. At this time, the floating positioning of the drone 1 on the water surface can be completed with the water surface positioning component.

[0034] The surface positioning assembly includes a first movable opening 10. The first movable opening 10 is opened on both side walls of the working box 3. The positioning plate 33 is located in the middle of the first movable opening 10. An underwater propeller 14 is slidably placed in the first movable opening 10. A threaded rod 27 is rotatably installed on the front and rear inner walls of the working box 3. An independent gear 37 is fixedly installed on the front and rear ends of the threaded rod 27. The driving mechanism drives the independent gear 37 to rotate. Two groups of symmetrically arranged movable blocks 28 are threadedly installed on the threaded rod 27. The internal threads of the two groups of movable blocks 28 are opposite. The two side walls of the two groups of movable blocks 28 are hingedly installed with second connecting rods 26 in sequence, and the second connecting rods 26 on the same side of the movable blocks 28 are cross-hingedly connected. The outer side wall of the underwater propeller 14 is provided with a second slide groove 32, and the front and rear inner walls of the second slide groove 32 are fixedly installed with a second slide rod 31. The second slide groove 32 has a built-in second slider 29. The number of the second sliders 29 is two groups and they are slidably connected with the second slide rod 31. The two groups of second sliders 29 are hingedly connected with the free ends of the two groups of second connecting rods 26 in sequence.

[0035] The driving mechanism drives the independent gear 37 to rotate. At this time, the threaded rod 27 rotates to cause the two groups of movable blocks 28 to move toward each other. At this time, the two groups of movable blocks 28 drive the ends of the second connecting rod 26 to approach each other, causing the underwater propeller 14 to extend out of the first movable opening 10. At this time, the underwater propeller 14 can be extended. At this time, driving the underwater propeller 14 can complete the reverse drive of the water flow direction, thereby completing the positioning of the drone 1.

[0036] The water inlet flow velocity detection mechanism includes a mounting rod 38, a first slide groove 25 is provided at the top of the mounting rod 38, a first slide rod 22 is fixedly installed on the front and rear inner walls of the first slide groove 25, a first slider 24 is built in the first slide groove 25, the number of the first slider 24 is two groups and they are slidably connected with the first slider 22, the two groups of first sliders 24 are sequentially located at the front and rear inner walls of the first slide groove 25, the top of the first slider 24 is hingedly installed with a first connecting rod 21 in turn, the two groups of first connecting rods 21 are cross-hingedly connected, the free ends of the two groups of first connecting rods 21 are hingedly connected with the two groups of movable blocks 28 in turn, and a cup-type flow meter 23 is fixedly installed at the center of the bottom of the mounting rod 38;

[0037] When the driving mechanism drives the threaded rod 27 to rotate and the movable blocks 28 move toward each other, the first connecting rod 21 at the bottom of the movable block 28 is also driven to move, causing the mounting rod 38 to move longitudinally, thereby causing the cup flowmeter 23 to move out of the bottom outside of the working box 3, so that the cup flowmeter 23 can contact the water flow without hindrance, thereby measuring the water flow velocity.

[0038] like Figure 3 and 8As shown, the driving mechanism includes a fixed plate 12, a motor 7, a threaded screw 13, a limiting rod 15, a limiting frame 36, a driving frame 16 and a driving rod 17. The fixed plate 12 is fixedly installed in the middle of the fixing member 8, the motor 7 is fixedly installed on the top of the fixed plate 12, and the threaded screw 13 is rotatably installed in the middle of the bottom of the fixed plate 12. The output end of the motor 7 longitudinally penetrates the fixed plate 12 and is fixedly connected to the threaded screw 13. The bottom of the fixed plate 12 is located at the front and rear sides of the threaded screw 13 and is fixedly installed with the limiting rod 15. The threaded screw A driving frame 16 is sleeved and installed on 13 and the limiting rod 15. The driving frame 16 is threadedly connected to the threaded screw 13, and the driving frame 16 is slidably connected to the limiting rod 15. The driving frame 16 is arranged in an inverted U-shaped structure. The front and rear ends of the driving frame 16 are located at the interval between the two sets of driving gears 20. The two side walls of the front and rear ends of the driving frame 16 are equipped with teeth meshing with the driving gear 20. The driving rod 17 is fixedly installed at the bottom of the front and rear ends of the driving frame 16, and the outer side wall of the driving rod 17 is provided with teeth meshing with the independent gear 37.

[0039] The motor 7 drives the threaded screw 13 to rotate. At this time, the driving frame 16 is limited by the limiting rod 15, causing the driving frame 16 to move longitudinally. At this time, the teeth on the driving frame 16 are engaged with the driving gear 20, causing the driving gear 20 to rotate, thereby driving the auxiliary gear 19 and the driven gear 18 to rotate, so that the support plate 4 can be unfolded. While the driving frame 16 moves longitudinally, it drives the driving rod 17 to move longitudinally. At this time, the teeth on the driving rod 17 are engaged with the independent gear 37, so that the independent gear 37 can rotate, thereby driving the threaded rod 27 to rotate, achieving the effect of driving the movable block 28 to move, so that the underwater propeller 14 and the cup current meter 23 can be driven to extend the operation of the working box 3.

[0040] like Figure 1 As shown, support blocks 9 are fixedly installed on the two side walls of the working box 3 just above the second movable opening 11, the support plate 4 is arranged in a hollow structure and is arranged horizontally with the water surface, and the bottom of the support block 9 is arranged in contact with the outer wall of the support plate 4.

[0041] The use of the support block 9 can fit with the bottom of the support block 9 after the support plate 4 is fully unfolded, so that the support block 9 supports the unfolded support plate 4, avoiding changes in the force on the support plate 4, which may cause the drone 1 to enter the water and be damaged.

[0042] like Figure 3 and 8 As shown, the front and rear inner walls of the working box 3 are fixedly mounted with a limit frame 36 , which is in an L-shaped structure and is arranged in close contact with the outer wall of the driving rod 17 .

[0043] The limiting frame 36 can effectively limit the driving rod 17, so as to plan the movement trajectory of the driving rod 17, avoid the driving rod 17 being unable to effectively mesh with the independent gear 37 due to the driving rod 17 being too thin, and ensure the normal use of the driving rod 17.

[0044] like Figure 7 As shown, a third slide groove 35 is opened on the positioning plate 33, and guide rods are fixedly installed on the inner walls of both sides of the third slide groove 35. The third slide groove 35 has a third slider 34 built in it. The third slider 34 is sleeved on the guide rod and slidably connected to the guide rod. An auxiliary plate 30 is fixedly installed on the bottom of the third slider 34, and the outer side wall of the auxiliary plate 30 is fixedly connected to the underwater thruster 14.

[0045] The addition of the auxiliary plate 30 can effectively ensure the stability of the underwater propeller 14 after being extended, and effectively ensure that the underwater propeller 14 will not automatically tilt after being deployed, thereby causing the underwater propeller 14 to be unable to be stored.

[0046] like Figure 3 As shown, an opening for the movement of the drive frame 16 is provided at the top of the work box 3, and the front and rear side walls of the drive frame 16 are fitted with the front and rear inner walls of the work box 3. The top of the drive frame 16 is initially located outside the work box 3, and the bottom ends of the limit rod 15 and the threaded screw 13 are located on the same horizontal line as the center of the driving gear 20, and the limit plates are fixedly installed at the bottoms of the limit rod 15 and the threaded screw 13.

[0047] The opening at the top of the work box 3 can ensure that the drive frame 16 has enough space to move, while avoiding movement interference between the work box 3 and the drive frame 16. At the same time, the use of the limit plate can effectively prevent the drive frame 16 from being separated from the threaded screw 13 after movement.

[0048] like Figure 3 As shown, the outer side of the bottom of the second movable opening 11 is arranged in an inclined structure, and the support plate 4 is arranged in an inclined structure in the storage state, the two groups of support plates 4 in the storage state are arranged in an eight-shaped structure, and the bottom of the work box 3 is arranged in an open structure.

[0049] The support plate 4 of the figure eight structure can support the drone 1 and ensure the stability of the drone 1 after it is placed, and can also be stored after the measurement is completed.

[0050] Working principle:

[0051] Before use: the operation box 3 is preferably installed through the connecting piece 2 and the fixing piece 8. At this time, the user drives the drone 1 to move to the river basin where the flow rate needs to be measured. At this time, the user lands the drone 1, so that the two sets of foam buoyancy rods 6 are attached to the water surface, and the motor 7 can be driven at this time;

[0052] When in use: the first step, the motor 7 drives the threaded screw 13 to rotate. At this time, the driving frame 16 is limited by the limiting rod 15, causing the driving frame 16 to move longitudinally. At this time, the teeth on the driving frame 16 are engaged with the driving gear 20, causing the driving gear 20 to rotate, thereby driving the auxiliary gear 19 and the driven gear 18 to rotate, so that the support plate 4 can be unfolded. While the driving frame 16 moves longitudinally, it drives the driving rod 17 to move longitudinally. At this time, the teeth on the driving rod 17 are engaged with the independent gear 37, so that the independent gear 37 can rotate, thereby driving the threaded rod 27 to rotate, achieving the effect of driving the movable block 28 to move, so that the underwater propeller 14 and the cup current meter 23 can be driven to extend out of the operation box 3;

[0053] In the second step, the active gear 20 drives the auxiliary gear 19 and the driven gear 18 to rotate. At this time, the two groups of support plates 4 begin to unfold until the support plates 4 can be parallel to the water surface. At this time, when the drone 1 falls on the water surface, the unfolded support plates 4 and the foam buoyancy rods 6 can float the drone 1 on the water surface. At this time, the floating positioning of the drone 1 on the water surface can be completed with the water surface positioning component. The independent gear 37 rotates. At this time, the threaded rod 27 rotates to cause the two groups of movable blocks 28 to move toward each other. At this time, the two groups of movable blocks 28 drive the ends of the second connecting rod 26 to approach each other. At this time The underwater propeller 14 is caused to extend out of the first movable opening 10. At this time, the underwater propeller 14 can be extended. At this time, the underwater propeller 14 can be driven to complete the reverse drive of the water flow direction, thereby completing the positioning of the drone 1. The movable blocks 28 move towards each other and drive the first connecting rod 21 at the bottom of the movable blocks 28 to move. At this time, the mounting rod 38 moves longitudinally, thereby causing the cup flow meter 23 to move out of the bottom outside of the working box 3, so that the cup flow meter 23 can contact the water flow without hindrance, and then measure the water flow velocity.

[0054] After use: directly drive the motor 7 to reset the drive frame 16, and then the support plate 4 is reset, so that the operation box 3 is out of the water surface, and then the user can drive the drone 1 to fly and reset.

[0055] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A water flow velocity measuring device based on an unmanned aerial vehicle, comprising an unmanned aerial vehicle (1), characterized in that: The drone (1) is fixedly mounted with a connecting piece (2), a fixing piece (8) is fixedly mounted on the connecting piece (2), a work box (3) is fixedly mounted on the bottom of the fixing piece (8), a positioning plate (33) is fixedly mounted on the inner side wall of the work box (3), a water surface floating component and a water surface positioning component are arranged on the work box (3), the water surface floating component and the water surface positioning component are located above the positioning plate (33), an inflow water flow velocity detection mechanism is arranged on the work box (3) below the positioning plate (33), and a driving mechanism is arranged on the work box (3), the driving mechanism is used to drive the inflow water flow velocity detection mechanism, the water surface floating component and the water surface positioning component to operate synchronously; The water surface floating assembly comprises a support block (9), a driven gear (18), an auxiliary gear (19), a driving gear (20), a second movable opening (11), a support plate (4), an elastic buckle (5) and a foam buoyancy rod (6); the second movable opening (11) is provided on the two side walls of the working box (3) at the top of the working box (3); the driven gear (18) is rotatably mounted on the front and rear inner walls of the second movable opening (11); the support plate (4) is fixedly mounted on the corresponding side wall of the driven gear (18); the support plate (4) is ) is fixedly mounted with an elastic buckle (5) at the bottom end, a foam buoyancy rod (6) is fixedly mounted on the elastic buckle (5), an auxiliary gear (19) and a driving gear (20) are rotatably mounted on the front and rear inner walls of the operation box (3), the auxiliary gears (19) and the driving gears (20) are both in two groups and are symmetrically arranged, the auxiliary gears (19) and the driving gears (20) are meshed, the auxiliary gears (19) and the driven gears (18) are meshed, and the driving mechanism drives the two groups of driving gears (20) to rotate; The surface positioning assembly comprises a first movable opening (10), both side walls of the working box (3) are provided with the first movable opening (10), a positioning plate (33) is located in the middle of the first movable opening (10), an underwater propeller (14) is slidably placed in the first movable opening (10), a threaded rod (27) is rotatably mounted on the front and rear inner walls of the working box (3), an independent gear (37) is fixedly mounted on the front and rear ends of the threaded rod (27), a driving mechanism drives the independent gear (37) to rotate, two groups of symmetrically arranged movable blocks (28) are threadedly mounted on the threaded rod (27), and the internal threads of the two groups of movable blocks (28) are mutually opposite. The second connecting rod (26) is hingedly installed on the two side walls of the two groups of movable blocks (28) in sequence, and the second connecting rod (26) located on the same side of the movable block (28) is cross-hingedly connected. The outer side wall of the underwater propeller (14) is provided with a second slide groove (32), and the front and rear inner walls of the second slide groove (32) are fixedly installed with a second slide rod (31). The second slide groove (32) has a second slider (29) built in it. The number of the second sliders (29) is two groups and they are slidably connected to the second slide rod (31). The two groups of second sliders (29) are hingedly connected to the free ends of the two groups of second connecting rods (26) in sequence. The water inlet flow velocity detection mechanism comprises a mounting rod (38), a first slide groove (25) is provided at the top of the mounting rod (38), a first slide rod (22) is fixedly installed on the front and rear inner walls of the first slide groove (25), a first slider (24) is built in the first slide groove (25), the first slider (24) is in two groups and is slidably connected with the first slider (22), the two groups of first sliders (24) are sequentially located at the front and rear inner walls of the first slide groove (25), the top of the first slider (24) is hingedly installed with a first connecting rod (21) in turn, the two groups of first connecting rods (21) are cross-hingedly connected, the free ends of the two groups of first connecting rods (21) are hingedly connected with the two groups of movable blocks (28) in turn, and a cup flow meter (23) is fixedly installed at the center of the bottom of the mounting rod (38).

2. The water flow velocity measuring device based on an unmanned aerial vehicle according to claim 1 is characterized in that: The driving mechanism comprises a fixing plate (12), a motor (7), a threaded screw (13), a limiting rod (15), a limiting frame (36), a driving frame (16) and a driving rod (17); the fixing plate (12) is fixedly mounted at the center of the fixing member (8); the motor (7) is fixedly mounted on the top of the fixing plate (12); the threaded screw (13) is rotatably mounted at the center of the bottom of the fixing plate (12); the output end of the motor (7) longitudinally penetrates the fixing plate (12) and is fixedly connected to the threaded screw (13); the limiting rod (15) is fixedly mounted on the bottom of the fixing plate (12) at the front and rear sides of the threaded screw (13); A drive frame (16) is sleeved and installed on the threaded rod (13) and the limit rod (15). The drive frame (16) is threadedly connected to the threaded rod (13). The drive frame (16) is slidably connected to the limit rod (15). The drive frame (16) is arranged in an inverted U-shaped structure. The front and rear ends of the drive frame (16) are located at the interval between the two sets of driving gears (20). The two side walls of the front and rear ends of the drive frame (16) are provided with teeth meshing with the driving gear (20). The bottom of the front and rear ends of the drive frame (16) is fixedly installed with a drive rod (17). The outer side wall of the drive rod (17) is provided with teeth meshing with the independent gear (37).

3. The water flow velocity measuring device based on drone according to claim 1 is characterized in that: The two side walls of the working box (3) are fixedly provided with support blocks (9) located just above the second movable opening (11); the support plate (4) is arranged in a hollow structure and is arranged horizontally with the water surface; the bottom of the support block (9) is arranged in contact with the outer side wall of the support plate (4).

4. The water flow velocity measuring device based on an unmanned aerial vehicle according to claim 2 is characterized in that: The front and rear inner walls of the operation box (3) are fixedly mounted with a limiting frame (36), which is an L-shaped structure and is arranged in close contact with the outer wall of the driving rod (17).

5. The water flow velocity measuring device based on drone according to claim 1 is characterized in that: The positioning plate (33) is provided with a third slide groove (35), guide rods are fixedly installed on the inner walls of both sides of the third slide groove (35), a third slider (34) is built in the third slide groove (35), the third slider (34) is sleeved on the guide rod and slidably connected to the guide rod, an auxiliary plate (30) is fixedly installed on the bottom of the third slider (34), and the outer side wall of the auxiliary plate (30) is fixedly connected to the underwater propeller (14).

6. The water flow velocity measuring device based on drone according to claim 2 is characterized in that: The top of the work box (3) is provided with an opening for the movement of the drive frame (16); the front and rear side walls of the drive frame (16) are arranged to fit the front and rear inner walls of the work box (3); the top of the drive frame (16) is initially located outside the work box (3); the bottom ends of the limit rod (15) and the threaded screw (13) are located on the same horizontal line as the center of the driving gear (20); and the bottoms of the limit rod (15) and the threaded screw (13) are fixedly mounted with limit plates.

7. The water flow velocity measuring device based on drone according to claim 1 is characterized in that: The outer side of the bottom of the second movable opening (11) is arranged in an inclined structure, and the support plate (4) is arranged in an inclined structure in the storage state, the two groups of support plates (4) in the storage state are arranged in an eight-shaped structure, and the bottom of the work box (3) is arranged in an open structure.

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