Soil sampling device for detecting organic carbon in grassland soil

Abstract

The invention discloses a soil sampling device for grassland soil organic carbon detection, and relates to the technical field of grassland soil detection.The device comprises an unmanned aerial vehicle frame, a sampling assembly, a grass blocking assembly and a cleaning assembly; the unmanned aerial vehicle frame is fixedly connected with two symmetrical second electric push rods through a support. Through the cleaning assembly, it is effectively avoided that when sampling is conducted on a next area, soil left in the fixing cylinder in the previous area enters a next sample box, and the soil detection result of the next area is affected; through the grass blocking assembly, when a second electric push rod drives the sampling assembly to descend for sampling, a drilling barrel can open a grass blocking plate, the grass blocking plate pokes grass open, most of the grass located around the grass blocking plate can be blocked outside the sampling range, the number of the grass entering a fixed barrel is effectively reduced, and the sampling efficiency is improved. And the workload of cleaning the grass in the detection process of workers is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of grassland soil detection, and specifically to a soil sampling device for detecting soil organic carbon in grasslands. Background Art

[0002] Organic carbon is a key indicator of grassland soil fertility. It can improve the soil structure, form good aggregates in the soil, increase the air permeability and water permeability of the soil, and is beneficial to the growth and development of plant roots. At the same time, during the decomposition process of organic carbon, various nutrients such as nitrogen, phosphorus, and potassium will be released, providing continuous nutrient supply for grassland plants, promoting vegetation growth, and improving the yield and quality of forage.

[0003] With the progress of the times, the sampling devices used for grassland organic carbon detection are becoming increasingly advanced. The gradual maturity of drone technology has enabled more and more traditional tasks to be taken over by it. This change has greatly saved manpower and material resources, and the operation is more convenient and efficient. Currently, there has emerged a method of using drones for soil sampling. Drones can quickly reach the sampling location and quickly send the soil samples back. Moreover, with the development of technology, drones can also achieve multi-location sampling, no longer requiring sampling at one location and then sending it back before going to another location for sampling, effectively shortening the flight and travel time.

[0004] However, such drones used for grassland soil sampling still have some drawbacks. On the one hand, during the multi-location sampling process, the drones do not clean the soil remaining from the previous sampling, resulting in the mixing of soil from different sampling areas, seriously affecting the accuracy of soil detection. On the other hand, during sampling, a large amount of grass is easily mixed into the samples. When staff detect the soil, they have to spend energy removing this grass to avoid interfering with the detection results, which undoubtedly increases the workload of the staff.

[0005] Based on this, a soil sampling device for detecting soil organic carbon in grasslands is now provided, which can eliminate the drawbacks of existing devices. Summary of the Invention

[0006] The purpose of the present invention is to provide a soil sampling device for detecting soil organic carbon in grasslands to solve the problems of the disadvantages of the modern product in the background art.

[0007] To achieve the above purpose, the present invention provides the following technical solutions:

[0008] A soil sampling device for detecting soil organic carbon in grasslands, including a drone frame, a sampling component, a grass blocking component, and a cleaning component. The drone frame is fixedly connected with two symmetric landing gears through brackets, and the drone frame is fixedly connected with two symmetric second electric push rods through brackets. The output ends of the two second electric push rods are jointly fixedly connected with a lifting plate;

[0009] The sampling component is arranged on the lifting plate and is used for sampling and collecting grassland soil in different areas;

[0010] The grass blocking component is arranged on the landing frame and is used to prevent a large amount of grass from entering the sampler during sampling;

[0011] The cleaning component is arranged on the drone frame and is used to clean the sampling component.

[0012] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:

[0013] In an optional solution: The sampling component includes a third fixing plate and a fourth fixing plate. The upper surface of the lifting plate is fixedly connected with the fourth fixing plate through a bracket. The upper surface of the fourth fixing plate is fixedly connected with the third fixing plate through a bracket. The upper surface of the third fixing plate is fixedly connected with the second fixing plate through a bracket. The upper surface of the second fixing plate is fixedly connected with the first fixing plate through a bracket;

[0014] The fourth fixing plate is fixedly connected with a first motor and a second motor through brackets. The output end of the first motor is connected with a second rotating shaft. The first fixing plate and the second fixing plate are jointly connected with a first rotating shaft through bearings. The third fixing plate and the fourth fixing plate are jointly connected with a drill barrel through bearings. A fixed barrel is slidably arranged on the inner wall of the drill barrel. The fixed barrel is fixedly connected with the first fixing plate. The fixed barrel is connected with a lifting rod through a bearing. A spiral blade is arranged on the part of the lifting rod located inside the fixed barrel. The part of the lifting rod located outside the fixed barrel is driven by a second synchronous belt driving member to be in transmission connection with the first rotating shaft. The first rotating shaft is in transmission connection with the second rotating shaft through a first synchronous belt driving member. A third gear is fixedly connected to the periphery of the drill barrel. The second rotating shaft is fixedly connected with a first gear. The first gear meshes with the third gear.

[0015] In an optional solution: The fourth fixing plate is fixedly connected with a second motor through a bracket. The output end of the second motor is connected with a second gear. The upper surface of the second fixing plate is connected with a placement plate through a bearing. A plurality of sample box grooves are formed on the upper surface of the placement plate. Sample boxes are placed in the sample box grooves. A toothed ring is fixedly connected to the lower surface of the placement plate. The toothed ring penetrates through the second fixing plate. The toothed ring meshes with the second gear. A hole is formed on the side wall of the sample box. The fixed barrel is slidably connected with the outer side wall of the sample box. An inlet hole is formed on the periphery of the fixed barrel. The inlet hole of the fixed barrel and the hole of the sample box are at the same height. The placement plate is connected with a positioning plate through bolts. The fixed barrel penetrates through the positioning plate. The lower surface of the positioning plate abuts against the sample box.

[0016] In an optional scheme: the cleaning component includes a water tank and a water pumping box, the upper surface of the first fixed plate is fixedly connected to a lifting frame, the lifting frame is fixedly connected to a piston rod, the piston rod and the lifting rod are connected through a bearing, the upper surface of the unmanned frame is fixedly installed with a water tank and a water pumping box, the piston rod and the water pumping box are slidably connected, one end of the piston rod located in the water pumping box is fixedly connected to a piston plate, the lifting rod is provided with a water supply hole, a second water pipe is provided in the piston rod, the second water pipe is connected to the water supply hole of the lifting rod, the part of the second water pipe located in the water pumping box is connected to the first water pipe, the first water pipe is provided with a one-way valve, the water tank and the water pumping box are connected through a third water pipe, the third water pipe is provided with a one-way valve, and a plurality of water spray heads are provided around the lifting rod.

[0017] In an optional solution: a hanging ring is provided on the inner top wall of the water pumping box, and the first water pipe passes through the hanging ring.

[0018] In an optional solution: the grass guard assembly includes a mounting ring and a grass guard plate, the landing gear is fixedly connected to the mounting ring via a bracket, the mounting ring is fixedly connected to a fixing ring via a connecting frame, the fixing ring is rotatably provided with four grass guard plates, a coil spring is provided at the connection between the grass guard plate and the fixing ring, and a shielding cloth is connected between two adjacent grass guard plates.

[0019] In an optional solution: two air pipes are provided through the lower surface of the water pumping box, the air pipes pass through the lifting plate, and one end of the air pipe away from the water pumping box is provided through the grass baffle.

[0020] In an optional solution: four first electric push rods facing each other are arranged on the upper surface of the landing gear, and fixed drill bits are arranged at output ends of the first electric push rods.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention uses a cleaning component to effectively prevent the soil remaining in the fixed cylinder of the previous area from entering the next sample box when sampling the next area, thereby affecting the result of soil detection in the next area.

[0023] 2. The present invention uses a grass blocking assembly. When the second electric push rod drives the sampling assembly to descend for sampling, the drill tube will open the grass blocking plate, and the grass blocking plate will push the grass away. Most of the grass around the grass blocking plate will be blocked outside the sampling range, effectively reducing the amount of grass entering the fixed tube and reducing the workload of the staff in cleaning out the grass during the detection process.

[0024] 3. In the present invention, the air located below the piston plate is discharged through the air pipe to the position of the grass guard plate, and the wind blows outward from inside the grass guard plate, causing the grass to bend outward, reducing the number of grass that rebounds back into the grass guard plate, and further improving the effect of the grass guard plate in blocking the grass. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the present invention.

[0026] Figure 2 is a first perspective view of the present invention.

[0027] Figure 3 is of the present invention Figure 2 enlarged view at A in

[0028] Figure 4 is a first sectional view of the present invention.

[0029] Figure 5 is of the present invention Figure 4 enlarged view at B in

[0030] Figure 6 is a second sectional view of the present invention.

[0031] Figure 7 is of the present invention Figure 6 enlarged view at C in

[0032] Figure 8 is a schematic diagram of the disassembly of the sample box of the present invention.

[0033] Figure 9 is a partial sectional view of the water pumping tank of the present invention.

[0034] Annotation of reference numerals in the drawings: 1 UAV frame, 2 landing gear, 3 water tank, 4 first electric push rod, 5 fixed drill bit, 6 second electric push rod, 7 water pumping tank, 8 sampling assembly, 9 grass blocking assembly, 10 cleaning assembly, 11 drill cylinder, 12 fixed cylinder, 13 lifting rod, 14 placement plate, 15 positioning plate, 16 sample box, 17 first rotating shaft, 18 first synchronous belt drive, 19 first gear, 20 first motor, 21 second rotating shaft, 22 second synchronous belt drive, 23 second motor, 24 second gear, 25 gear ring, 26 lifting frame, 27 piston rod, 28 piston plate, 29 first water pipe, 30 second water pipe, 31 first fixing plate, 32 second fixing plate, 33 third fixing plate, 34 fourth fixing plate, 35 lifting plate, 36 air pipe, 37 mounting ring, 38 shielding cloth, 39 fixing ring, 40 grass guard plate, 41 third gear, 42 third water pipe. DETAILED DESCRIPTION OF THE INVENTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0036] In one embodiment, Figures 1-9 As shown, a soil sampling device for detecting organic carbon in grassland soil includes an unmanned aerial vehicle frame 1, a sampling component 8, a grass blocking component 9, and a cleaning component 10. The unmanned aerial vehicle frame 1 is fixedly connected to two symmetrical landing frames 2 through a bracket. The unmanned aerial vehicle frame 1 is fixedly connected to two symmetrical second electric push rods 6 through a bracket. The output ends of the two second electric push rods 6 are fixedly connected to a lifting plate 35.

[0037] The sampling assembly 8 is arranged on the lifting plate 35 and is used to sample and collect grassland soil in different areas;

[0038] The grass blocking assembly 9 is arranged on the landing frame 2 to prevent a large amount of grass from entering the sampler during sampling;

[0039] The cleaning component 10 is disposed on the drone frame 1 and is used to clean the sampling component 8 .

[0040] In one embodiment, the sampling assembly 8 includes a third fixing plate 33 and a fourth fixing plate 34, the upper surface of the lifting plate 35 is fixedly connected to the fourth fixing plate 34 through a bracket, the upper surface of the fourth fixing plate 34 is fixedly connected to the third fixing plate 33 through a bracket, the upper surface of the third fixing plate 33 is fixedly connected to the second fixing plate 32 through a bracket, and the upper surface of the second fixing plate 32 is fixedly connected to the first fixing plate 31 through a bracket;

[0041] The fourth fixed plate 34 is fixedly connected to the first motor 20 and the second motor 23 through a bracket, the output end of the first motor 20 is connected to the second rotating shaft 21, the first fixed plate 31 and the second fixed plate 32 are commonly connected to the first rotating shaft 17 through a bearing, the third fixed plate 33 and the fourth fixed plate 34 are commonly connected to the drill barrel 11 through a bearing, a fixed cylinder 12 is slidably provided on the inner wall of the drill barrel 11, the fixed cylinder 12 is fixedly connected to the first fixed plate 31, the fixed cylinder 12 is connected to the lifting rod 13 through a bearing, the part of the lifting rod 13 located in the fixed cylinder 12 is provided with a spiral blade, the part of the lifting rod 13 located outside the fixed cylinder 12 is transmission-connected to the first rotating shaft 17 through the second synchronous belt driving member 22, the first rotating shaft 17 is transmission-connected to the second rotating shaft 21 through the first synchronous belt driving member 18, the third gear 41 is fixedly connected to the peripheral side of the drill barrel 11, the second rotating shaft 21 is fixedly connected to the first gear 19, and the first gear 19 is meshed with the third gear 41.

[0042] Then, start the second electric push rod 6 again. The second electric push rod 6 drives the sampling assembly 8 to descend. At the same time, start the first motor 20. The rotation of the first motor 20 drives the rotation of the second rotating shaft 21. The second rotating shaft 21 drives the rotation of the first gear 19. The first gear 19 cooperates with the third gear 41 to drive the drill barrel 11 to rotate. Moreover, the drill barrel 11 cooperates with the conical structure located below the drill barrel 11, making it easier for the drill barrel 11 to enter the soil for sampling;

[0043] While the second rotating shaft 21 is rotating, through the cooperation of the first synchronous belt drive 18, the first rotating shaft 17, and the second synchronous belt drive 22, the lifting rod 13 is driven to rotate. The rotation of the lifting rod 13 drives the soil that has entered the fixed cylinder 12 to be lifted upward. When it reaches the top, it enters the sample box 16 through the feed hole, completing the collection of a regional sample.

[0044] In one embodiment, the fourth fixing plate 34 is fixedly connected with a second motor 23 through a bracket. The output end of the second motor 23 is connected with a second gear 24. The upper surface of the second fixing plate 32 is connected with a placement plate 14 through a bearing. A number of sample box grooves are provided on the upper surface of the placement plate 14. Sample boxes 16 are placed in the sample box grooves. The lower surface of the placement plate 14 is fixedly connected with a gear ring 25. The gear ring 25 penetrates through the second fixing plate 32. The gear ring 25 meshes with the second gear 24. A hole is provided on the side wall of the sample box 16. The fixed cylinder 12 is slidably connected with the outer side wall of the sample box 16. A feed hole is provided on the peripheral side of the fixed cylinder 12. The feed hole of the fixed cylinder 12 and the hole of the sample box 16 are at the same height. The placement plate 14 is connected with a positioning plate 15 through bolts. The fixed cylinder 12 penetrates through the positioning plate 15. The lower surface of the positioning plate 15 abuts against the sample box 16.

[0045] After sampling is completed, start the second electric push rod 6 again. While the second electric push rod 6 drives the sampling assembly 8 to rise, start the second motor 23 through program control. The second motor 23 drives the placement plate 14 to rotate one unit through the cooperation of the second gear 24 and the gear ring 25, so that the next sample box 16 is located at the feed hole of the fixed cylinder 12, facilitating the collection of grassland soil in the next area;

[0046] After sampling is completed, the bolts of the positioning plate 15 can be removed, the positioning plate 15 can be lifted, and then the six sample boxes 16 can be taken out and sent to the detection place for detection. The positioning plate 15 can fix the sample boxes 16 to prevent the sample boxes 16 from falling during flight.

[0047] In one embodiment, the cleaning component 10 includes a water tank 3 and a pumping tank 7. The upper surface of the first fixing plate 31 is fixedly connected with a lifting frame 26. The lifting frame 26 is fixedly connected with a piston rod 27. The piston rod 27 is connected to the lifting rod 13 through a bearing. The upper surface of the unmanned aerial vehicle frame 1 is fixedly installed with a water tank 3 and a pumping tank 7. The piston rod 27 is slidably connected through the pumping tank 7. One end of the piston rod 27 located inside the pumping tank 7 is fixedly connected with a piston plate 28. The lifting rod 13 is provided with a water delivery hole. A second water pipe 30 is arranged inside the piston rod 27. The second water pipe 30 is communicated with the water delivery hole of the lifting rod 13. The part of the second water pipe 30 located inside the pumping tank 7 is connected with a first water pipe 29. The first water pipe 29 is provided with a one-way valve. The water tank 3 and the pumping tank 7 are communicated through a third water pipe 42. The third water pipe 42 is provided with a one-way valve. A plurality of water spray heads are arranged on the periphery of the lifting rod 13.

[0048] While the second electric push rod 6 drives the sampling component 8 to descend for sampling, the second water pipe 30 drives the piston rod 27 to descend. The piston rod 27 drives the piston plate 28 to descend, and the water in the water tank 3 is pumped into the pumping tank 7 through the third water pipe 42. During the process that the second electric push rod 6 drives the sampling component 8 to ascend to end the sampling, the second water pipe 30 drives the piston rod 27 to ascend. The piston rod 27 drives the piston plate 28 to ascend, and the water in the pumping tank 7 flows into the lifting rod 13 through the first water pipe 29 and the second water pipe 30, and then sprays out from the spray heads on the periphery of the lifting rod 13 to wash the inner side wall of the fixed cylinder 12.

[0049] During the flushing process, the first motor 20 can be started in reverse to make the lifting rod 13 rotate in reverse, discharge the soil that has not entered the sample box 16 in the fixed cylinder 12, and wash it out of the fixed cylinder 12 with the water flow, completing the cleaning operation, effectively avoiding the soil remaining in the fixed cylinder 12 in the previous area from entering the next sample box 16 and affecting the soil detection result of the next area.

[0050] In one embodiment, a hanging ring is arranged on the inner top wall of the pumping tank 7, and the first water pipe 29 passes through the hanging ring. This can prevent water from entering the lifting rod 13 during the water pumping process.

[0051] In one embodiment, the grass blocking component 9 includes a mounting ring 37 and a grass blocking plate 40. The landing frame 2 is fixedly connected with a mounting ring 37 through a bracket. The mounting ring 37 is fixedly connected with a fixed ring 39 through a connecting frame. Four grass blocking plates 40 are rotatably arranged on the fixed ring 39. A torsion spring is arranged at the connection between the grass blocking plate 40 and the fixed ring 39. A shielding cloth 38 is connected between two adjacent grass blocking plates 40.

[0052] Due to the arrangement of the shielding cloth 38, when the grass blocking plates 40 are in the unfolded state, it can prevent grass from drilling into the inside of the grass blocking plates 40 through the gaps between two adjacent grass blocking plates 40.

[0053] The coil spring is used to drive the grass guard plate 40 to reset.

[0054] While the second electric push rod 6 drives the sampling assembly 8 to descend for sampling, the drill tube 11 will open the grass baffle 40, and the grass baffle 40 will push the grass away. Most of the grass around the grass baffle 40 will be blocked outside the sampling range, effectively reducing the amount of grass entering the fixed tube 12 and reducing the workload of the staff in cleaning out the grass during the inspection process.

[0055] In one embodiment, two air pipes 36 are provided through the lower surface of the water pumping box 7 . The air pipes 36 pass through the lifting plate 35 . One end of the air pipes 36 away from the water pumping box 7 is provided through the grass baffle 40 .

[0056] While the second electric push rod 6 drives the sampling assembly 8 to descend for sampling, as the cleaning assembly 10 is simultaneously performing a pumping operation, the piston plate 28 descends, and the air below the piston plate 28 is discharged to the position of the grass baffle 40 through the air pipe 36, allowing the wind to blow outward from the inside of the grass baffle 40, causing the grass to bend outward, thereby reducing the amount of grass that bounces back into the grass baffle 40, and further improving the grass blocking effect of the grass baffle 40.

[0057] In one embodiment, four first electric push rods 4 are disposed on the upper surface of the landing gear 2 and are opposed to each other in pairs. A fixed drill bit 5 is disposed at the output end of the first electric push rod 4 .

[0058] The UAV is landed in the area to be inspected on the grassland, and the first electric push rod 4 is started first. The first electric push rod 4 drives the fixed drill bit 5 to descend and drill into the soil to fix the UAV.

[0059] The above embodiment discloses a soil sampling device for detecting organic carbon in grassland soil, and its specific working principle and process are as follows:

[0060] S1: Land the UAV in the area to be inspected on the grassland, start the first electric push rod 4, and the first electric push rod 4 drives the fixed drill bit 5 to descend and drill into the soil to fix the UAV;

[0061] S2: Start the second electric push rod 6 again, the second electric push rod 6 drives the sampling assembly 8 to descend, and at the same time start the first motor 20, the first motor 20 rotates to drive the second rotating shaft 21 to rotate, the second rotating shaft 21 drives the first gear 19 to rotate, the first gear 19 cooperates with the third gear 41 to drive the drill barrel 11 to rotate, and the drill barrel 11 cooperates with the conical structure located below the drill barrel 11, so that the drill barrel 11 can easily enter the soil for sampling.

[0062] While the second rotating shaft 21 rotates, the lifting rod 13 is driven to rotate through the cooperation of the first synchronous belt driving member 18, the first rotating shaft 17, and the second synchronous belt driving member 22. The rotation of the lifting rod 13 drives the soil entering the fixed cylinder 12 to be lifted upwards. When reaching the top, the soil enters the sample box 16 through the feed hole, completing the collection of samples of one area.

[0063] S3: After the sampling is completed, the second electric push rod 6 is started again. While the second electric push rod 6 drives the sampling assembly 8 to rise, the second motor 23 is started by program control. The second motor 23 drives the placement plate 14 to rotate one unit through the cooperation of the second gear 24 and the gear ring 25, so that the next sample box 16 is located at the feeding hole of the fixed cylinder 12, which is convenient for collecting grassland soil in the next area;

[0064] S4: After sampling, the bolts of the positioning plate 15 can be removed, the positioning plate 15 can be lifted, and then the six sample boxes 16 can be taken out and sent to the detection site for detection. The positioning plate 15 can fix the sample boxes 16 to prevent the sample boxes 16 from falling during flight.

[0065] In addition, while the second electric push rod 6 drives the sampling assembly 8 to descend for sampling, the second water pipe 30 drives the piston rod 27 to descend, and the piston rod 27 drives the piston plate 28 to descend, so that the water in the water tank 3 is pumped into the water pumping box 7 through the third water pipe 42. In the process of the second electric push rod 6 driving the sampling assembly 8 to rise and end the sampling, the second water pipe 30 drives the piston rod 27 to rise, and the piston rod 27 drives the piston plate 28 to rise, so that the water in the water pumping box 7 flows into the lifting rod 13 through the first water pipe 29 and the second water pipe 30, and then is sprayed out from the nozzle on the side of the lifting rod 13 to wash the inner wall of the fixed cylinder 12;

[0066] During the flushing process, the first motor 20 can be started in reverse to make the lifting rod 13 rotate in reverse, discharge the soil in the fixed cylinder 12 that has not entered the sample box 16, and flush it out of the fixed cylinder 12 with the water flow to complete the cleaning operation, effectively preventing the soil remaining in the fixed cylinder 12 of the previous area from entering the next sample box 16 when sampling the next area, thereby affecting the result of soil detection in the next area;

[0067] In addition, while the second electric push rod 6 drives the sampling assembly 8 to descend for sampling, the drill tube 11 will open the grass baffle 40, and the grass baffle 40 will move the grass away, so that most of the grass around the grass baffle 40 will be blocked outside the sampling range, effectively reducing the amount of grass entering the fixed tube 12 and reducing the workload of the staff to clean out the grass during the inspection process;

[0068] In addition, while the second electric push rod 6 drives the sampling assembly 8 to descend for sampling, since the cleaning assembly 10 is simultaneously performing a pumping operation, the piston plate 28 descends, and the air below the piston plate 28 is discharged through the air pipe 36 to the position of the grass baffle 40, causing the wind to blow outwards from inside the grass baffle 40, bending the grass outwards, reducing the number of grass that rebounds back into the grass baffle 40, and further improving the effect of the grass baffle 40 in blocking the grass;

[0069] And because of the provision of the shielding cloth 38, when the grass baffle 40 is in the unfolded state, it is possible to prevent grass from drilling into the inside of the grass baffle 40 through the gap between two adjacent grass baffles 40.

[0070] As described above, the above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A soil sampling device for detecting soil organic carbon in grasslands, characterized in that, It includes a drone frame (1), a sampling component (8), a grass blocking component (9), and a cleaning component (10). The drone frame (1) is fixedly connected with two symmetrical landing gears (2) through brackets. The drone frame (1) is fixedly connected with two symmetrical second electric push rods (6) through brackets. The output ends of the two second electric push rods (6) are jointly fixedly connected with a lifting plate (35); The sampling component (8) is arranged on the lifting plate (35) and is used for sampling and collecting grassland soil in different areas; The grass blocking component (9) is arranged on the landing gear (2) and is used to prevent a large amount of grass from entering the sampler during sampling; The cleaning component (10) is arranged on the drone frame (1) and is used to clean the sampling component (8).

2. The soil sampling device for detecting soil organic carbon in grassland soil according to claim 1, characterized in that, The sampling component (8) includes a third fixing plate (33) and a fourth fixing plate (34). The upper surface of the lifting plate (35) is fixedly connected with the fourth fixing plate (34) through a bracket. The upper surface of the fourth fixing plate (34) is fixedly connected with the third fixing plate (33) through a bracket. The upper surface of the third fixing plate (33) is fixedly connected with a second fixing plate (32) through a bracket. The upper surface of the second fixing plate (32) is fixedly connected with a first fixing plate (31) through a bracket; The fourth fixing plate (34) is fixedly connected with a first motor (20) and a second motor (23) through brackets. The output end of the first motor (20) is connected with a second rotating shaft (21). The first fixing plate (31) and the second fixing plate (32) are jointly connected with a first rotating shaft (17) through bearings. The third fixing plate (33) and the fourth fixing plate (34) are jointly connected with a drill barrel (11) through bearings. A fixed barrel (12) is slidably arranged on the inner wall of the drill barrel (11). The fixed barrel (12) is fixedly connected with the first fixing plate (31). The fixed barrel (12) is connected with a lifting rod (13) through a bearing. A spiral blade is arranged on the part of the lifting rod (13) located inside the fixed barrel (12). The part of the lifting rod (13) located outside the fixed barrel (12) is driven by a second synchronous belt driving member (22) to be in transmission connection with the first rotating shaft (17). The first rotating shaft (17) is in transmission connection with the second rotating shaft (21) through a first synchronous belt driving member (18). A third gear (41) is fixedly connected to the periphery of the drill barrel (11). The second rotating shaft (21) is fixedly connected with a first gear (19). The first gear (19) meshes with the third gear (41).

3. The soil sampling device for detecting soil organic carbon in grasslands according to claim 2, characterized in that, The fourth fixing plate (34) is fixedly connected with a second motor (23) through a bracket. The output end of the second motor (23) is connected with a second gear (24). The upper surface of the second fixing plate (32) is connected with a placing plate (14) through a bearing. A plurality of sample box grooves are formed on the upper surface of the placing plate (14). A sample box (16) is placed in the sample box groove. A toothed ring (25) is fixedly connected to the lower surface of the placing plate (14). The toothed ring (25) penetrates through the second fixing plate (32). The toothed ring (25) meshes with the second gear (24). A hole is formed in the side wall of the sample box (16). The fixed cylinder (12) is slidably connected with the outer side wall of the sample box (16). A feeding hole is formed on the periphery of the fixed cylinder (12). The feeding hole of the fixed cylinder (12) and the hole of the sample box (16) are at the same height. The placing plate (14) is connected with a positioning plate (15) through a bolt. The fixed cylinder (12) penetrates through the positioning plate (15). The lower surface of the positioning plate (15) abuts against the sample box (16).

4. A soil sampling device for detecting soil organic carbon in grasslands according to claim 2, characterized in that, The cleaning assembly (10) includes a water tank (3) and a water pumping tank (7). A lifting frame (26) is fixedly connected to the upper surface of the first fixing plate (31). The lifting frame (26) is fixedly connected with a piston rod (27). The piston rod (27) is connected with a lifting rod (13) through a bearing. A water tank (3) and a water pumping tank (7) are fixedly installed on the upper surface of the drone frame (1). The piston rod (27) is slidably connected through the water pumping tank (7). One end of the piston rod (27) located in the water pumping tank (7) is fixedly connected with a piston plate (28). A water delivery hole is formed in the lifting rod (13). A second water pipe (30) is arranged in the piston rod (27). The second water pipe (30) is communicated with the water delivery hole of the lifting rod (13). A part of the second water pipe (30) located in the water pumping tank (7) is connected with a first water pipe (29). A one-way valve is arranged on the first water pipe (29). The water tank (3) and the water pumping tank (7) are communicated through a third water pipe (42). A one-way valve is arranged on the third water pipe (42). A plurality of water spray heads are arranged on the periphery of the lifting rod (13).

5. A soil sampling device for detecting soil organic carbon in grasslands according to claim 4, characterized in that, A hanging ring is arranged on the inner top wall of the water pumping tank (7). The first water pipe (29) penetrates through the hanging ring.

6. The soil sampling device for detecting soil organic carbon in grassland according to claim 4, wherein, The grass blocking assembly (9) includes a mounting ring (37) and a grass blocking plate (40). The landing frame (2) is fixedly connected with a mounting ring (37) through a bracket. The mounting ring (37) is fixedly connected with a fixing ring (39) through a connecting frame. Four grass blocking plates (40) are rotatably arranged on the fixing ring (39). A coil spring is arranged at the connection part of the grass blocking plate (40) and the fixing ring (39). A shielding cloth (38) is connected between two adjacent grass blocking plates (40).

7. A soil sampling device for detecting soil organic carbon in grasslands according to claim 4, characterized in that, Two air pipes (36) penetrate through the lower surface of the water pumping tank (7). The air pipes (36) penetrate through the lifting plate (35). One end of the air pipe (36) far away from the water pumping tank (7) penetrates through and is arranged on the grass blocking plate (40).

8. The soil sampling device for detecting soil organic carbon in grasslands according to claim 1, characterized in that, On the upper surface of the landing gear (2), there are four first electric push rods (4) that are pairwise opposite, and a fixed drill bit (5) is provided at the output end of the first electric push rod (4).

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