Road surface flatness measuring device based on unmanned aerial vehicle aerial platform

Abstract

The invention belongs to the technical field of pavement flatness measuring devices, and discloses an unmanned aerial vehicle aerial platform-based pavement flatness measuring device, which comprises an unmanned aerial vehicle main body, supporting legs and a mounting top plate are fixedly mounted at the bottom end of the unmanned aerial vehicle main body, and a placement box is mounted at the bottom end of the mounting top plate through a connecting assembly. A measuring instrument is arranged in the placement box, a buffer assembly is arranged in the unmanned aerial vehicle main body, a protection assembly is arranged in the placement box, the buffer assembly comprises a parachute arranged in the unmanned aerial vehicle main body, a stall sensor is mounted in the mounting top plate, an air pump is arranged in the placement box, and the side wall of the air pump is connected with an air inlet pipe. When the unmanned aerial vehicle body falls, the stall sensor monitors that the landing speed of the unmanned aerial vehicle body is changed, the parachute is controlled to be opened to slow down and slowly descend, the air pump is started, the air inlet pipe is made to spray air, counter-acting force is provided, the falling posture and stability of the unmanned aerial vehicle body are adjusted, and the safety of the measuring device is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of road surface smoothness measuring devices, and specifically relates to a road surface smoothness measuring device based on an unmanned aerial vehicle aerial platform. Background Art

[0002] The measurement of road surface flatness is an important part of road construction and maintenance, which is directly related to driving safety, comfort and the service life of the road surface.

[0003] The road surface roughness measuring device based on the UAV aerial platform is a comprehensive system that integrates UAV technology, sensor technology and data processing technology. It uses the UAV as a flight platform and carries high-resolution cameras, laser radar and other sensors to quickly and comprehensively detect the road surface. The UAV can achieve high-precision flight control and real-time data transmission through its flight control system and data transmission system, providing reliable data support for the measurement of road surface roughness.

[0004] After searching, such as patent: CN217606085U, a device for measuring terrain flatness, including a drone and an ultrasonic rangefinder, the ultrasonic rangefinder is detachably connected to the drone, the lower surface of the drone is fixedly connected to the assembly seat, the lower surface of the assembly seat is provided with a positioning groove A and a positioning groove B, the front position of the assembly seat is slidably plugged with a positioning pin, and a spring is sleeved on the surface of the positioning pin, the assembly seat is fixedly connected to the lower surface of the drone, and the upper surface of the ultrasonic rangefinder is fixedly connected to the positioning column and the positioning block, when assembling, the positioning pin is pulled outward, the spring undergoes elastic deformation, the ultrasonic rangefinder is plugged relative to the assembly seat, the positioning column is plugged with the positioning groove A, the positioning block is plugged with the positioning groove B, the pulling force on the positioning pin is removed, and under the elastic force of the spring, the plug-in end of the positioning pin extends to the inside of the positioning hole of the positioning block, the positioning block is pressed and fixed, the assembly is convenient and the stability is good;

[0005] During the flight, drones are affected by many environmental factors, such as wind force, wind direction, temperature, air pressure and electromagnetic interference. These factors will have an adverse effect on the flight stability of the drone and increase the risk of it falling. Once the drone falls, the impact force and gravity acceleration will cause serious physical damage to the measuring device, resulting in loss or damage of stored data. Summary of the invention

[0006] The purpose of the present invention is to provide a road surface flatness measuring device based on an unmanned aerial vehicle aerial platform to solve the problems raised in the above-mentioned background technology.

[0007] In order to achieve the above-mentioned object, the present invention provides the following technical solutions: a road surface flatness measuring device based on an unmanned aerial platform, comprising an unmanned aerial vehicle body, a supporting leg and a mounting top plate fixedly mounted on the bottom end of the unmanned aerial vehicle body, a placement box mounted on the bottom end of the mounting top plate through a connecting component, a measuring instrument arranged inside the placement box, a buffer component arranged inside the unmanned aerial vehicle body, and a protective component arranged inside the placement box;

[0008] The buffer assembly includes a parachute arranged inside the drone body, a stall sensor is installed inside the mounting top plate, an air pump is arranged inside the placement box, and an air intake pipe is connected to the side wall of the air pump.

[0009] As a further technical solution of the present invention, the connecting assembly includes a first connecting block fixedly installed on both sides of the mounting top plate, the interiors of the two first connecting blocks are threadedly connected with threaded rods, the bottom ends of the two threaded rods are fixedly installed with handles, the outer walls of the two threaded rods are rotatably connected with second connecting blocks, the two second connecting blocks are fixedly installed on both sides of the placement box, the top of the placement box is fixedly connected with a connecting rod, and the connecting rod is slidably installed inside the mounting top plate.

[0010] As a further technical solution of the present invention, the protection component includes an air bag arranged inside the placement box, and the top end of the air bag is connected to the air inlet pipe.

[0011] As a further technical solution of the present invention, a first pull rope is fixedly installed on the inner wall of the airbag, and the end of the first pull rope away from the airbag is installed on the outer wall of the first rotating shaft. The outer wall of the first rotating shaft is provided with a second fixed block and a coil spring, and the second fixed block is fixedly installed inside the airbag.

[0012] As a further technical solution of the present invention, there are multiple first rotating shafts, each of which is arranged on four sides inside the airbag, and the two ends of each first rotating shaft are connected by a bevel gear set, and the bevel gear set is installed inside the first fixed block, and the first fixed block is fixedly installed inside the airbag.

[0013] As a further technical solution of the present invention, a blocking block is slidably connected inside the placement box, a second pull rope is fixedly connected to the bottom end of the blocking block, and the second pull rope is installed on the outer wall of the first rotating shaft.

[0014] As a further technical solution of the present invention, a spring is provided at the top of the blocking block, and the spring is installed inside the placement box.

[0015] As a further technical solution of the present invention, an air outlet pipe is provided inside the placement box, the bottom end of the air outlet pipe is connected to the airbag, a ball valve is rotatably installed inside the air outlet pipe, and a second rotating shaft is fixedly installed on the top end of the ball valve.

[0016] As a further technical solution of the present invention, a slide groove is provided on the outer wall of the second rotating shaft, a slider is slidably connected inside the slide groove, and the slider is fixedly installed inside the mounting top plate.

[0017] As a further technical solution of the present invention, a torsion spring is provided on the outer wall of the second rotating shaft, and the torsion spring is installed inside the placement box.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The present invention provides a buffer component. When the drone body falls, the stall sensor detects that the landing speed of the drone body changes, controls the parachute to open and slow down the descent, and starts the air pump to spray air from the intake pipe to provide a reaction force, adjust the falling posture and stability of the drone body, and reduce its speed before impact, thereby reducing the impact force. This avoids serious physical damage to the measuring device due to the impact force and gravity acceleration once the drone falls, resulting in loss or damage of stored data, thereby improving the safety of the measuring device.

[0020] 2. The present invention provides a protective component. When gas enters the interior of the air inlet pipe, a portion of the gas enters the interior of the airbag, causing the airbag to expand rapidly and wrap around the four sides of the bottom of the measuring instrument to protect it, thereby preventing the corners of the measuring instrument from being damaged by impact when the drone body falls, further improving the protective effect of the measuring instrument, and thus improving the safety of the measuring device.

[0021] 3. The present invention is connected to the mounting top plate through the second rotating shaft. When the measuring instrument needs to be taken out, the placement box moves downward and is separated from the mounting top plate. The movement of the placement box drives the second rotating shaft to slide downward inside the mounting top plate. The second rotating shaft rotates under the guidance of the slide groove. The rotation of the second rotating shaft drives the rotation of the ball valve, so that the gas inside the airbag is discharged from the outlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the structural cross-section of the top plate of the present invention;

[0025] Figure 4 For the present invention Figure 3 A schematic diagram of the structure enlargement in the middle;

[0026] Figure 5 For the present invention Figure 3 A magnified schematic diagram of the structure at B in the middle;

[0027] Figure 6 For the present invention Figure 3 A magnified schematic diagram of the structure at C in the middle;

[0028] Figure 7 For the present invention Figure 3 A magnified schematic diagram of the structure at D in the middle;

[0029] Figure 8 It is a schematic cross-sectional view of the structure of the placement box of the present invention;

[0030] Fig. 9 It is a schematic cross-sectional view of the structure of the airbag of the present invention;

[0031] Fig.10 This is a schematic diagram of the structure of the parachute after opening.

[0032] In the figure: 1. UAV body; 2. Support legs; 3. Mounting top plate; 4. Measuring instrument; 5. Placement box; 6. Connecting rod; 7. First connecting block; 8. Threaded rod; 9. Second connecting block; 10. Handle; 11. Parachute; 12. Airbag; 13. Air pump; 14. Inlet pipe; 15. First pull rope; 16. First rotating shaft; 17. First fixed block; 18. Bevel gear set; 19. Second fixed block; 20. Coil spring; 21. Second pull rope; 22. Block; 23. Spring; 24. Exit pipe; 25. Ball valve; 26. Second rotating shaft; 27. Torsion spring; 28. Slide; 29. ​​Slider; 30. Stall sensor. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] like Figures 1 to 10 As shown, in an embodiment of the present invention, a road surface flatness measuring device based on an unmanned aerial platform includes an unmanned aerial vehicle body 1, a supporting leg 2 and a mounting top plate 3 are fixedly mounted on the bottom end of the unmanned aerial vehicle body 1, a placing box 5 is mounted on the bottom end of the mounting top plate 3 through a connecting component, a measuring instrument 4 is arranged inside the placing box 5, a buffer component is arranged inside the unmanned aerial vehicle body 1, and a protective component is arranged inside the placing box 5;

[0035] The buffer assembly includes a parachute 11 arranged inside the drone body 1, a stall sensor 30 is installed inside the mounting top plate 3, an air pump 13 is arranged inside the placement box 5, and an air intake pipe 14 is connected to the side wall of the air pump 13.

[0036] The bottom end of the air inlet pipe 14 is disposed around the bottom of the placement box 5;

[0037] By setting the buffer component, when the drone body 1 falls, the stall sensor 30 monitors the change in the landing speed of the drone body 1, controls the parachute 11 to open and slow down the descent, and starts the air pump 13 to make the air intake pipe 14 spray to provide a reaction force, adjust the falling posture and stability of the drone body 1, and reduce its speed before the impact, thereby reducing the impact force, avoiding serious physical damage to the measuring device due to the impact force and gravity acceleration once the drone falls, resulting in loss or damage of stored data, thereby improving the safety of the measuring device.

[0038] like Figures 1 to 10 As shown, the connecting assembly includes a first connecting block 7 fixedly installed on both sides of the mounting top plate 3, the interiors of the two first connecting blocks 7 are both threadedly connected with threaded rods 8, the bottom ends of the two threaded rods 8 are both fixedly installed with handles 10, the outer walls of the two threaded rods 8 are both rotatably connected with second connecting blocks 9, the two second connecting blocks 9 are fixedly installed on both sides of the placement box 5, the top of the placement box 5 is fixedly connected with a connecting rod 6, and the connecting rod 6 is slidably installed inside the mounting top plate 3.

[0039] Through the setting of the connecting component, when the measuring instrument 4 needs to be taken out, first rotate the two handles 10 on both sides of the placement box 5. The rotation of the handles 10 drives the rotation of the threaded rod 8, so that the threaded rod 8 slides out of the first connecting block 7, so that the placement box 5 carrying the measuring instrument 4 slides downward, and then the measuring instrument 4 is taken out of the placement box 5.

[0040] like Figures 1 to 10 As shown, the protection component includes an air bag 12 arranged inside the placement box 5, and the top end of the air bag 12 is connected to the air intake pipe 14.

[0041] The interior of the placing box 5 is provided with a cavity for the air bag 12 to expand, so that the four sides of the bottom of the measuring instrument 4 are in contact with the air bag 12;

[0042] The outer wall of the air bag 12 is fixedly connected to the inner wall of the placement box 5;

[0043] By setting the protective component, when the gas enters the interior of the air intake pipe 14, a part of the gas enters the interior of the airbag 12, causing the airbag 12 to expand rapidly and wrap around the four sides of the bottom of the measuring instrument 4 to protect it, thereby preventing the corners of the measuring instrument 4 from being damaged by impact when the drone body 1 falls, further improving the protective effect of the measuring instrument 4, thereby improving the safety of the measuring device.

[0044] like Figures 1 to 10 As shown, a first pull rope 15 is fixedly installed on the inner wall of the airbag 12, and one end of the first pull rope 15 away from the airbag 12 is installed on the outer wall of the first rotating shaft 16. The outer wall of the first rotating shaft 16 is provided with a second fixed block 19 and a coil spring 20, and the second fixed block 19 is fixedly installed inside the airbag 12.

[0045] When the airbag 12 is inflated, the airbag 12 drives one end of the first pull rope 15 to move, so that the first pull rope 15 is unwound on the outer wall of the first rotating shaft 16, and drives the first rotating shaft 16 to rotate. When the first rotating shaft 16 rotates, the coil spring 20 deforms to store elastic potential energy, and after the airbag 12 is deflated, the elastic potential energy is released by the coil spring 20 to cause the first rotating shaft 16 to rewind the first pull rope 15, pulling the airbag 12 back into the placement box 5 to reset.

[0046] like Figures 1 to 10 As shown, a plurality of first rotating shafts 16 are provided, and each first rotating shaft 16 is respectively provided on four sides inside the airbag 12 , and both ends of each first rotating shaft 16 are connected by a bevel gear set 18 , and the bevel gear set 18 is installed inside the first fixed block 17 , and the first fixed block 17 is fixedly installed inside the airbag 12 .

[0047] The four first rotating shafts 16 are rotated simultaneously to improve the retraction effect of the airbag 12 .

[0048] like Figures 1 to 10 As shown, a blocking block 22 is slidably connected to the interior of the placement box 5 , and a second pull rope 21 is fixedly connected to the bottom end of the blocking block 22 . The second pull rope 21 is installed on the outer wall of the first rotating shaft 16 .

[0049] One end of the second pull rope 21 away from the blocking block 22 is fixedly mounted on the outer wall of the first rotating shaft 16. When the first rotating shaft 16 rotates, the second pull rope 21 is rolled up, and the blocking block 22 is pulled by the second pull rope 21 to slide inside the placement box 5, thereby blocking the passage connecting the air inlet pipe 14 and the airbag 12, so that the gas no longer enters the interior of the airbag 12, thereby improving the stability and reliability of the airbag 12 when inflating.

[0050] like Figures 1 to 10 As shown, a spring 23 is provided at the top of the blocking block 22 , and the spring 23 is installed inside the placement box 5 .

[0051] The bottom end of the spring 23 is fixedly connected to the top end of the block 22, and the top end of the spring 23 is fixedly connected to the inner wall of the placement box 5;

[0052] When the second pull rope 21 pulls the blocking block 22 to move, the spring 23 is deformed by force to store elastic potential energy. When the airbag 12 is deflated, the elastic potential energy is released by the spring 23 to drive the spring 23 to move upward and reset.

[0053] like Figures 1 to 10 As shown, an air outlet pipe 24 is provided inside the placement box 5 , the bottom end of the air outlet pipe 24 is connected to the airbag 12 , a ball valve 25 is rotatably installed inside the air outlet pipe 24 , and a second rotating shaft 26 is fixedly installed at the top end of the ball valve 25 .

[0054] like Figures 1 to 10 As shown, a slide groove 28 is formed on the outer wall of the second rotating shaft 26 , and a slider 29 is slidably connected inside the slide groove 28 . The slider 29 is fixedly installed inside the mounting top plate 3 .

[0055] The slide groove 28 is set to a quarter turn, so that the ball valve 25 rotates ninety degrees;

[0056] When the measuring instrument 4 needs to be taken out, the placement box 5 moves downward and is separated from the mounting top plate 3. The movement of the placement box 5 drives the second rotating shaft 26 to slide downward inside the mounting top plate 3. The second rotating shaft 26 rotates under the guidance of the slide groove 28. The rotation of the second rotating shaft 26 drives the rotation of the ball valve 25, so that the gas inside the airbag 12 is discharged from the outlet pipe 24.

[0057] like Figures 1 to 10 As shown, a torsion spring 27 is provided on the outer wall of the second rotating shaft 26 , and the torsion spring 27 is installed inside the placement box 5 .

[0058] When the second rotating shaft 26 rotates, the torsion spring 27 is deformed by force, and the elastic potential energy released by the torsion spring 27 causes the second rotating shaft 26 to reverse and reset, so that the ball valve 25 closes the air outlet pipe 24, so that the airbag 12 is stably inflated.

[0059] Working principle and usage process:

[0060] When it is necessary to measure the road surface flatness, first place the measuring instrument 4 inside the placement box 5, and by turning the handle 10, drive the threaded rod 8 to rotate and connect with the first connecting block 7, so that the top end of the placement box 5 fits with the bottom end of the mounting top plate 3, and then the drone body 1 is flown to measure the road surface flatness;

[0061] During the flight and measurement of the drone body 1, the stall sensor 30 monitors it in real time. When the drone body 1 falls, the parachute 11 is controlled to be deployed and the air pump 13 is started. The parachute 11 is deployed to slow down the drone body 1, and the air pump 13 is started to make the air intake pipe 14 spray downward to provide a reaction force to adjust the falling posture and stability of the drone body 1.

[0062] When the air inlet pipe 14 sprays air, a portion of the gas enters the interior of the airbag 12, causing the airbag 12 to inflate and wrap around the four sides of the bottom of the measuring instrument 4 to protect it;

[0063] When the airbag 12 is inflated, the airbag 12 drives one end of the first pull rope 15 to move, so that the first pull rope 15 is unwound on the outer wall of the first rotating shaft 16, and drives the first rotating shaft 16 to rotate. When the first rotating shaft 16 rotates, the coil spring 20 is deformed to store elastic potential energy;

[0064] When the first rotating shaft 16 rotates, the second pull rope 21 is rolled up, and the blocking block 22 is pulled by the second pull rope 21 to slide inside the measuring instrument 4, thereby blocking the passage connecting the air intake pipe 14 and the air bag 12, so that the gas no longer enters the air bag 12;

[0065] When the second pull rope 21 pulls the block 22 to move, the spring 23 is deformed by force to store elastic potential energy;

[0066] When the measuring instrument 4 needs to be taken out after the drone body 1 lands, the handle 10 is similarly turned to make the threaded rod 8 slide out of the first connecting block 7, so that the placement box 5 moves downward and is separated from the mounting top plate 3. The movement of the placement box 5 drives the second rotating shaft 26 to slide downward inside the mounting top plate 3. The second rotating shaft 26 rotates under the guidance of the slide groove 28. The rotation of the second rotating shaft 26 drives the rotation of the ball valve 25, so that the gas inside the airbag 12 is discharged from the outlet pipe 24.

[0067] After the gas is discharged from the airbag 12, the coil spring 20 and the spring 23 release elastic potential energy to drive the first pull rope 15 and the blocking block 22 to reset;

[0068] Finally, the measuring instrument 4 is taken out to complete the measurement.

[0069] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A road surface roughness measuring device based on an unmanned aerial vehicle platform, comprising an unmanned aerial vehicle body (1), characterized in that: The bottom end of the drone body (1) is fixedly mounted with a support leg (2) and a mounting top plate (3); the bottom end of the mounting top plate (3) is mounted with a placement box (5) via a connecting component; a measuring instrument (4) is arranged inside the placement box (5); a buffer component is arranged inside the drone body (1); and a protective component is arranged inside the placement box (5); The buffer assembly comprises a parachute (11) arranged inside the drone body (1), a stall sensor (30) is installed inside the mounting top plate (3), an air pump (13) is arranged inside the placement box (5), and the side wall of the air pump (13) is connected to an air intake pipe (14).

2. The road surface flatness measuring device based on an unmanned aerial platform according to claim 1 is characterized in that: The connection assembly comprises first connection blocks (7) fixedly mounted on both sides of the mounting top plate (3), the interiors of the two first connection blocks (7) are both threadedly connected with threaded rods (8), the bottom ends of the two threaded rods (8) are both fixedly mounted with handles (10), the outer walls of the two threaded rods (8) are both rotatably connected with second connection blocks (9), the two second connection blocks (9) are fixedly mounted on both sides of the placement box (5), the top end of the placement box (5) is fixedly connected with a connection rod (6), and the connection rod (6) is slidably mounted inside the mounting top plate (3).

3. The road surface flatness measuring device based on an unmanned aerial platform according to claim 1 is characterized in that: The protection component comprises an air bag (12) arranged inside the placement box (5), and the top end of the air bag (12) is connected to the air intake pipe (14).

4. The road surface flatness measuring device based on an unmanned aerial platform according to claim 3 is characterized in that: A first pull rope (15) is fixedly mounted on the inner wall of the airbag (12); one end of the first pull rope (15) away from the airbag (12) is mounted on the outer wall of a first rotating shaft (16); a second fixing block (19) and a coil spring (20) are provided on the outer wall of the first rotating shaft (16); and the second fixing block (19) is fixedly mounted inside the airbag (12).

5. The road surface flatness measuring device based on an unmanned aerial platform according to claim 4 is characterized in that: A plurality of the first rotating shafts (16) are provided, each of the first rotating shafts (16) is respectively provided on four sides inside the airbag (12), and both ends of each of the first rotating shafts (16) are connected via a bevel gear set (18), and the bevel gear set (18) is installed inside the first fixed block (17), and the first fixed block (17) is fixedly installed inside the airbag (12).

6. The road surface flatness measuring device based on an unmanned aerial platform according to claim 4 is characterized in that: A blocking block (22) is slidably connected inside the placement box (5), and a second pull rope (21) is fixedly connected to the bottom end of the blocking block (22), and the second pull rope (21) is installed on the outer wall of the first rotating shaft (16).

7. The road surface flatness measuring device based on an unmanned aerial platform according to claim 6 is characterized in that: A spring (23) is provided at the top end of the blocking block (22), and the spring (23) is installed inside the placement box (5).

8. The road surface flatness measuring device based on an unmanned aerial platform according to claim 3 is characterized in that: An air outlet pipe (24) is provided inside the placement box (5), the bottom end of the air outlet pipe (24) is connected to the air bag (12), a ball valve (25) is rotatably installed inside the air outlet pipe (24), and a second rotating shaft (26) is fixedly installed at the top end of the ball valve (25).

9. The road surface flatness measuring device based on an unmanned aerial platform according to claim 8 is characterized in that: The outer wall of the second rotating shaft (26) is provided with a sliding groove (28), the interior of the sliding groove (28) is slidably connected with a sliding block (29), and the sliding block (29) is fixedly mounted inside the mounting top plate (3).

10. The road surface flatness measuring device based on an unmanned aerial platform according to claim 8, characterized in that: The outer wall of the second rotating shaft (26) is provided with a torsion spring (27), and the torsion spring (27) is installed inside the placement box (5).

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