Soil nutrient detection device based on near infrared spectrum technology

Abstract

The invention relates to the technical field of analysis and detection, in particular to a soil nutrient detection device based on a near infrared spectrum technology, which comprises a control handle, a fixed disc is fixedly connected to the outer wall of the control handle, a rotating disc is rotatably connected to one end, away from the control handle, of the fixed disc, and a gear ring is fixedly connected to the outer wall of the rotating disc. The gear and the gear ring are meshed with each other, a plurality of sampling mechanisms capable of sampling soil are fixedly mounted in the gear ring, a plurality of rotary power-assisted mechanisms are fixedly mounted at one end, close to the fixed disc, of the gear ring, and the rotary power-assisted mechanisms can rotate the sampling mechanisms, so that the sampling mechanisms can better sample the soil; each group of sampling mechanism is internally provided with a discharging structure capable of discharging soil, the outer wall of the fixed disc is fixedly provided with an infrared spectrometer, and the infrared spectrometer can detect the soil in the corresponding sampling mechanism and can sample excessive soil.

Description

Technical Field

[0001] The invention relates to the technical field of analysis and detection, in particular to a soil nutrient detection device based on near infrared spectroscopy technology. Background Art

[0002] With the development of agricultural modernization, soil environmental monitoring, geological exploration and other fields, it is becoming increasingly important to quickly and accurately detect soil components. Traditional soil detection methods are usually through laboratory chemical analysis, which is cumbersome and troublesome. Since different soil components have unique absorption and reflection characteristics in the infrared band, the analysis of these spectral characteristics can better identify the organic matter, minerals, water and nutrients in the soil.

[0003] However, existing infrared soil spectrometers have limitations in practical applications. On the one hand, many infrared spectrometers are large in size and complex in structure, making them difficult to be brought to field work sites, limiting their application in soil testing in large areas of farmland and remote areas, as well as real-time soil analysis. On the other hand, during testing, a single sample cannot fully represent the overall condition of the soil, especially in areas where soil components are unevenly distributed. Currently, most spectrometers lack the convenience of multiple sampling tests, which affects the efficiency and accuracy of testing.

[0004] Chinese patent (publication number CN105319172B), which discloses a soil nutrient detection device based on visible-near infrared spectroscopy technology, including a measuring box chamber installed on a mobile platform, a GPS module and a liquid crystal display module installed on the top of the mobile platform, and a generator and a three-point suspension device installed at the front end of the mobile platform. The measuring box chamber is sealed on five sides, and the bottom opening is in contact with the soil surface. The light source is installed on the top of the measuring box chamber, and the optical fiber probe is installed in the middle of the measuring box chamber; the optical fiber probe is connected to the controller via a spectrometer, the GPS module and the liquid crystal display module are both connected to the controller, and the three-point suspension device is connected to the tractor. The invention realizes continuous detection of soil nutrients, has simple structure and operation, low cost, and is easy to promote. The entire detection process is pollution-free and is suitable for continuous and uninterrupted detection in large areas of farmland.

[0005] According to the above scheme, it can be seen that in the above scheme, only the components in the soil are detected, and when in use, due to its large size and inconvenient to carry, it can only detect the outer surface of the soil, and the components inside the soil cannot be detected. It has limitations. In order to solve the problem that it is too large to be carried and can only detect the outer surface of the soil, and the components inside the soil cannot be detected, we propose a soil nutrient detection device based on near-infrared spectroscopy technology. Summary of the invention

[0006] The purpose of the present invention is to provide a soil nutrient detection device based on near infrared spectroscopy technology to solve the problems raised in the above background technology.

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

[0008] A soil nutrient detection device based on near-infrared spectroscopy technology comprises a control handle, the outer wall of the control handle is fixedly connected to a fixed disc, and the end of the fixed disc away from the control handle is connected to a rotating disc by rotation, the outer wall of the rotating disc is fixedly connected to a gear ring, and a driving motor is fixedly installed at the bottom of the control handle, the output end of the driving motor is fixedly connected to a gear, and the gear and the gear ring are meshed with each other;

[0009] A plurality of sampling mechanisms for sampling soil are fixedly installed inside the gear ring, and a plurality of rotation assist mechanisms are fixedly installed at one end of the gear ring close to the fixed disc, and the rotation assist mechanism can rotate the sampling mechanism so that the sampling mechanism can better sample the soil. A unloading structure for unloading soil is installed inside each group of the sampling mechanisms, and an infrared spectrometer is fixedly installed on the outer wall of the fixed disc, and the infrared spectrometer can detect the soil inside the corresponding sampling mechanism.

[0010] As a further embodiment of the present invention, the sampling mechanism includes two groups of first retractable arms, and the two groups of the first retractable arms are fixedly connected to the outer wall of the rotating disk, and the opposite ends of the two groups of the first retractable arms are fixedly connected to retractable rods, and one end of one group of retractable rods away from the first retractable arms is fixedly connected to an abutment wheel, and a dislocation opening is opened on the outer wall of the fixed disk, the abutment wheel is located inside the dislocation opening, and the end of the abutment wheel away from the first retractable arm is fixedly connected to a recovery wheel.

[0011] As a further feature of the present invention, the recovery wheel is fixedly connected to a matching round block at one end away from the abutment wheel, and a plurality of mounting grooves are provided on the outer wall of the matching round block, and a reset spring is fixedly connected to the inside of each group of the mounting grooves, and an abutment ball is fixedly connected to one end of each group of the reset springs away from the inner wall of the mounting groove, and a matching round tube is fixedly connected to the outer wall of a group of retraction rods close to the matching round tube, and a plurality of hemispherical grooves are provided on the inside of the matching round tube, and the outer wall of each group of abutment balls is clamped in the corresponding inner wall of the hemispherical groove, and a pull rope is fixedly connected to the outer wall of the recovery wheel.

[0012] As a further feature of the present invention, a sampling tube is arranged between the two groups of first retractable arms, the sampling tube is slidably installed inside the fixed disc, and the end of the sampling tube close to the abutment wheel is fixedly connected to a third ring, and the outer wall of the third ring is fixedly connected to a matching frame, the end of the matching frame away from the sampling tube is rotatably connected to a matching block, the end of the matching block away from the matching frame is fixedly connected to a pull rope, a limiting retractable strip is fixedly connected between the third ring and each group of first retractable arms, and the outer wall of the sampling tube is fixedly connected to the first ring.

[0013] As a further feature of the present invention, a sliding block is fixedly connected to the outer wall of the first ring, a plurality of rubber bands are fixedly connected between the first ring and the third ring, and the end of the first ring away from the third ring is rotatably connected to the second ring, a first spring is fixedly connected between the second ring and the fixed disk, and the inner wall of the second ring is slidably connected to the outer wall of the sampling tube, and a closed semicircular tube is fixedly connected between the second ring and the rotating disk.

[0014] As a further feature of the present invention, the rotation assist mechanism comprises two groups of closed semicircular tubes, the outer wall of each group of closed semicircular tubes is rotatably connected to the first retractable arm via a rotating bar, and the two groups of closed semicircular tubes are slidably connected to the outer wall of the rotating disc.

[0015] As a further feature of the present invention, two groups of second rotating arms and first rotating arms are rotatably connected between each two groups of closed semicircular tubes, and each group of second rotating arms is rotatably connected to the corresponding first rotating arm. Two groups of second springs are also fixedly connected between each two groups of closed semicircular tubes, and an incomplete threaded hole is provided in each group of opposite closed semicircular tubes.

[0016] As a further feature of the present invention, the unloading structure includes a shrinkable rubber sleeve, and the shrinkable rubber sleeve is fixedly connected to the corresponding inner wall of the sampling tube. One end of the shrinkable rubber sleeve away from the inner wall of the sampling tube is fixedly connected with a friction tooth, and the outer wall of the friction tooth abuts against the inner wall of the sampling tube.

[0017] As a further feature of the present invention, a plurality of abutting rubber sleeves are fixedly connected to the outer wall of the rotating disc, and an arc block is fixedly connected to one end of the abutting rubber sleeve away from the rotating disc, and each group of the abutting rubber sleeves is fixedly connected to the corresponding shrinking rubber sleeve through a pipe, and an abutting rod is fixedly connected to one end of the fixed disc close to the abutting rubber sleeve.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. When the present invention is used, when the sampling tube rotates and collides with the soil, its circumferential surface continuously contacts the soil and exerts a force. The centrifugal force and tangential friction force generated by this rotation help to quickly break up the soil agglomeration structure, making soil particles easier to separate and move. Compared with simple vertical insertion sampling, the rotating sampling tube can penetrate the soil more quickly and reduce the sampling time.

[0020] 2. When the present invention is used, the closed semicircular tube and the sampling tube are made of quartz material, which has many advantages for infrared spectrometer to detect internal soil. Optically, quartz has good transmittance in the infrared band and good optical uniformity, which can reduce light loss and scattering, ensure the accuracy of spectral signals, and facilitate accurate analysis of soil components. Moreover, chemically, quartz has strong chemical stability and does not react with soil components, which can ensure the accuracy of the detection results. Moreover, since the sampling tube is inserted into the soil, when the sampling tube is tilted, the soil inside the sampling tube will be broken, and the soil will remain inside the sampling tube. The soil inside the sampling tube can be better detected by the infrared spectrometer, avoiding the problem of only detecting the outer surface of the soil, and reducing the error of the experiment.

[0021] 3. When the present invention is used, due to its small overall structure, it is suitable for use in various places and is easy for staff to carry. In addition, the design of multiple sets of sampling tubes can sample the soil multiple times, which is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is the front view of the soil nutrient detection device based on near-infrared spectroscopy technology.

[0023] Figure 2 This is a side view of a soil nutrient detection device based on near-infrared spectroscopy technology.

[0024] Figure 3 This is the rear view of the soil nutrient detection device based on near-infrared spectroscopy technology.

[0025] Figure 4 This is a schematic diagram of the position structure of the recovery wheel in the soil nutrient detection device based on near-infrared spectroscopy technology.

[0026] Figure 5 This is a schematic diagram of the position structure of the first spring in the soil nutrient detection device based on near-infrared spectroscopy technology.

[0027] Figure 6 This is a schematic diagram of the position structure of the rubber belt in the soil nutrient detection device based on near-infrared spectroscopy technology.

[0028] Figure 7 This is a schematic diagram of the structure of the sampling mechanism in the soil nutrient detection device based on near-infrared spectroscopy technology.

[0029] Figure 8This is a schematic diagram of the position structure of the matching round blocks in the soil nutrient detection device based on near-infrared spectroscopy technology.

[0030] Fig. 9 This is a schematic diagram of the position structure of the closed semicircular tube in the soil nutrient detection device based on near-infrared spectroscopy technology.

[0031] Fig.10 This is a schematic diagram of the position structure of the sliding block in the soil nutrient detection device based on near-infrared spectroscopy technology.

[0032] Fig.11 This is a schematic diagram of the internal structure of the sampling tube in the soil nutrient detection device based on near-infrared spectroscopy technology.

[0033] Fig.12 Schematic diagram of the internal structure of the closed semicircular tube in the soil nutrient detection device based on near-infrared spectroscopy technology.

[0034] In the figure: 1. control handle; 2. display screen; 3. infrared spectrometer; 4. fixed disc; 5. drive motor; 6. gear; 7. mounting ring; 8. gear ring; 9. rotating disc; 10. sampling tube; 11. first spring; 12. rotating bar; 13. retracting rod; 14. pull rope; 15. dislocation port;

[0035] 16. Recovery wheel; 17. Abutment wheel; 18. First retractable arm; 19. Closed semicircular tube; 20. Matching circular tube; 21. First rotating arm; 22. Second spring; 23. Rubber band; 24. First circular ring; 25. Second circular ring; 26. Friction tooth; 27. Matching block; 28. Matching frame; 29. ​​Incomplete threaded hole;

[0036] 30. Slide groove; 31. Sliding bar; 32. Limiting and shrinking bar; 33. Third circular ring; 34. Sliding block; 35. Shrinking rubber sleeve; 36. Abutting ball; 37. Matching circular block; 38. Abutting rubber sleeve; 39. Abutting rod; 40. Second rotating arm; 101. Sampling mechanism; 201. Rotation assist mechanism; 301. Unloading structure. DETAILED DESCRIPTION

[0037] 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.

[0038] Example 1: Please refer to Figure 1 , 2As shown in Figures 3 and 4, in an embodiment of the present invention, a soil nutrient detection device based on near-infrared spectroscopy technology includes a control handle 1, a trigger is installed on the outer wall of the control handle 1, a fixed disc 4 is fixedly connected to the outer wall of the control handle 1, and the end of the fixed disc 4 away from the control handle 1 is rotatably connected to a rotating disc 9, and a plurality of weight-reducing holes are opened on the outer walls of the rotating disc 9 and the fixed disc 4, and the plurality of weight-reducing holes are respectively distributed in a circle on the outer walls of the fixed disc 4 and the rotating disc 9, a gear ring 8 is fixedly connected to the outer wall of the rotating disc 9, and a driving motor 5 is fixedly installed on the bottom of the control handle 1, a gear 6 is fixedly connected to the output end of the driving motor 5, and the gear 6 and the gear ring 8 are meshed with each other, and a gear 6 is fixedly installed inside the gear ring 8. A plurality of sampling mechanisms 101 for sampling soil are provided, and a plurality of rotating assist mechanisms 201 are fixedly installed on one end of the gear ring 8 close to the fixed disc 4, and the rotating assist mechanism 201 can rotate the sampling mechanism 101, so that the sampling mechanism 101 can better sample the soil, and a discharging structure 301 for discharging soil is installed inside each group of sampling mechanisms 101, an infrared spectrometer 3 is fixedly installed on the outer wall of the fixed disc 4, and the infrared spectrometer 3 can detect the soil inside the corresponding sampling mechanism 101, a display screen 2 for displaying the structure swept by the infrared spectrometer 3 is fixedly installed on the upper end of the control handle 1, and a mounting ring 7 is fixedly connected to the outer wall of the rotating disc 9.

[0039] Example 2: Please refer to Figure 4 , 5 As shown in Figures 6, 7 and 8, the sampling mechanism 101 includes two groups of first retractable arms 18, and the two groups of first retractable arms 18 are fixedly connected to the outer wall of the rotating disk 9, and the two groups of first retractable arms 18 are symmetrically distributed on the outer wall of the rotating disk 9. The opposite ends of the two groups of first retractable arms 18 are fixedly connected with retractable rods 13, and one end of one group of retractable rods 13 away from the first retractable arms 18 is fixedly connected with an abutment wheel 17, and an anti-skid rubber pad is pasted on the outer wall of the abutment wheel 17, and the anti-skid rubber pad can enhance the friction between the outer wall of the abutment wheel 17 and the fixed disk 4, and a dislocation opening 15 is opened on the outer wall of the fixed disk 4, and the dislocation opening 15 is curved, and the dislocation opening 15 is adapted to each group of abutment wheels 17, and the abutment wheels 17 are located inside the dislocation opening 15, and the abutment The end of the wheel 17 away from the first retracting arm 18 is fixedly connected to the recovery wheel 16, and the end of the recovery wheel 16 away from the abutment wheel 17 is fixedly connected to the matching round block 37, and the outer wall of the matching round block 37 is provided with a plurality of installation grooves, and each group of installation grooves is fixedly connected with a return spring, and each group of return springs is fixedly connected with an abutment ball 36 at one end away from the inner wall of the installation groove, and the abutment ball 36 is spherical, and the outer wall of a group of retracting rods 13 close to the matching circular tube 20 is fixedly connected to the matching circular tube 20, and the matching circular tube 20 is provided with a plurality of hemispherical grooves, and the plurality of hemispherical grooves are circumferentially distributed inside the matching circular tube 20, and the outer wall of each group of abutment balls 36 is clamped in the inner wall of the corresponding hemispherical groove, and the outer wall of the recovery wheel 16 is fixedly connected with the pull rope 14;

[0040] Specifically, when the recovery wheel 16 rotates, the pull rope 14 is pulled. When the pull rope 14 is pulled to the limit and cannot be pulled, the abutment wheel 17 is still rotating closely against the outer wall of the fixed disc 4, and the abutment wheel 17 also drives the recovery wheel 16 to rotate. The recovery wheel 16 drives the matching round block 37 to rotate. The matching round block 37 drives all the return springs and the abutment balls 36 to move in the inner wall of the matching round tube 20. The abutment balls 36 will break away from the corresponding hemispherical groove inner wall and enter the next group of hemispherical grooves, and the cycle repeats in sequence.

[0041] See also Figure 4 , 5 As shown in , 6, 7, 10, and 12, a sampling tube 10 is arranged between the two groups of first contraction arms 18, and the sampling tube 10 is slidably installed inside the fixed disc 4, and one end of the sampling tube 10 away from the recovery wheel 16 is fixedly connected to a plurality of friction teeth 26, and the plurality of friction teeth 26 are circumferentially distributed on the outer wall of the sampling tube 10, and each group of friction teeth 26 is triangular, and the triangular shape can better break the soil, and one end of the sampling tube 10 close to the abutment wheel 17 is fixedly connected to a third ring 33, and the outer wall of the third ring 33 is fixedly connected to a matching frame 28, and the end of the matching frame 28 away from the sampling tube 10 is rotatably connected to a matching block 27 through a rotating shaft, and the end of the matching block 27 away from the matching frame 28 is fixedly connected to the pull rope 14, and the third ring 33 is connected to each group of first contraction arms 18. A limited shrinkage strip 32 is fixedly connected, a first ring 24 is fixedly connected to the outer wall of the sampling tube 10, a sliding block 34 is fixedly connected to the outer wall of the first ring 24, a plurality of rubber bands 23 are fixedly connected between the first ring 24 and the third ring 33, and the rubber bands 23 are made of rubber material, which has good elasticity and corrosion resistance and is durable, and the plurality of rubber bands 23 are distributed in a circle between the first ring 24 and the third ring 33, and the end of the first ring 24 away from the third ring 33 is rotatably connected to the second ring 25, a first spring 11 is fixedly connected between the second ring 25 and the fixed disk 4, and the inner wall of the second ring 25 is slidably connected to the outer wall of the sampling tube 10, and a closed semicircular tube 19 is fixedly connected between the second ring 25 and the rotating disk 9.

[0042] See also Figure 6 , 9As shown in FIG. 10 , the rotation assist mechanism 201 includes two groups of closed semicircular tubes 19, each group of closed semicircular tubes 19 has a rotating bar 12 rotatably connected to the outer wall of the first contraction arm 18, and the two groups of closed semicircular tubes 19 are slidably connected to the outer wall of the rotating disk 9. The closed semicircular tubes 19 and the sampling tube 10 are both made of quartz material, and quartz has good transmittance in the infrared band, especially in the near-infrared and mid-infrared regions (from the shorter wavelength of the near-infrared to most of the commonly used wavelength ranges of the mid-infrared, such as the 2-25 μm wavelength range). The infrared light can be effectively transmitted through the quartz container to reach the soil sample, and the absorption and reflection of the infrared light by the soil sample can also be accurately detected through the quartz container. The two groups of closed semicircular tubes 19 are symmetrically distributed on the outer wall of the rotating disk 9. Specifically, a plurality of slide grooves 30 are provided at one end of the rotating disk 9 close to the closed semicircular tubes 19, and a sliding bar 31 is slidably connected inside each group of slide grooves 30. The sliding bars 31 are fixed to the corresponding closed semicircular tubes 19. The inner wall of the slide groove 30 and the outer wall of the sliding bar 31 are both coated with lubricating oil. When the closed semicircular tube 19 drives the sliding bar 31 to move in the corresponding inner wall of the slide groove 30, the slide groove 30 can provide a guiding effect on the closed semicircular tube 19 through the sliding bar 31, and also has a limiting effect, and improves the stability of the closed semicircular tube 19 when moving. The lubricating oil can also reduce the friction between the sliding bar 31 and the inner wall of the slide groove 30. Two sets of second rotating arms 40 and first rotating arms 21 are rotatably connected between each two sets of closed semicircular tubes 19, and Each set of second rotating arms 40 is rotatably connected to the corresponding first rotating arms 21, and each set of first rotating arms 21 is symmetrically distributed with the corresponding second rotating arms 40. Two sets of second springs 22 are fixedly connected between each two sets of closed semicircular tubes 19. An incomplete threaded hole 29 is provided in the opposite set of each set of closed semicircular tubes 19. Each set of incomplete threaded holes 29 is adapted to the sliding block 34. It is worth noting that when the incomplete threaded holes 29 provided in the two sets of closed semicircular tubes 19 are connected to each other, a complete threaded hole will be formed.

[0043] See also Figure 3 , 4As shown in Figures 11, the unloading structure 301 includes a shrinkable rubber sleeve 35, and the shrinkable rubber sleeve 35 is fixedly connected to the inner wall of the corresponding sampling tube 10. The end of the shrinkable rubber sleeve 35 away from the inner wall of the sampling tube 10 is fixedly connected with a friction tooth 26, and the outer wall of the friction tooth 26 abuts against the inner wall of the sampling tube 10. A rubber sealing strip is installed on the outer wall of the friction tooth 26, and the rubber sealing strip can enhance the sealing between the friction tooth 26 and the inner wall of the sampling tube 10. A plurality of abutting rubber sleeves 38 are fixedly connected to the outer wall of the rotating disc 9, and the end of the abutting rubber sleeve 38 away from the rotating disc 9 is fixedly connected with a bending block, and each group of abutting rubber sleeves 38 is fixedly connected to the corresponding shrinkable rubber sleeve 35 through a pipeline. An abutting rod 39 is fixedly connected to the end of the fixed disc 4 close to the abutting rubber sleeve 38, and the outer wall of the abutting rod 39 is also provided with a bending arc shape. The bending arc shape of the abutting rod 39 and the bending arc block can reduce the friction between the two.

[0044] The working principle of the present invention is:

[0045] When the present invention is used, the upper end of the rotating disk 9 is aligned with the soil to be sampled, and the trigger is pressed at this time. The trigger starts the driving motor 5, and the driving motor 5 drives the gear ring 8 and the rotating disk 9 to rotate through the gear 6. The rotating disk 9 drives all the first contraction arms 18 to rotate, and the first contraction arms 18 drive the abutment wheel 17 to abut against the outer wall of the fixed disk 4 through the contraction rod 13. When the abutment wheel 17 moves to the inside of the dislocation opening 15, since the abutment wheel 17 will be located inside the dislocation opening 15, the two groups of first contraction arms 18 will extend, and the first contraction arms 18 will pull the closed semicircular tube 19 through the rotating bar 12. At this time, the two groups of closed semicircular tubes 19 will move in opposite directions. At this time, the first spring 11 will drive the sampling tube 10 to move through the second ring 25, and the sliding block 34 will move along the gap between the two groups of closed semicircular tubes 19. At this time, the sampling tube 10 will impact the soil, and the sampling tube 10 will quickly insert into the soil. When the sampling tube 10 releases the insertion When the sampling tube 10 is inserted, the trigger is released, the driving motor 5 is powered off, and the gear 6 and the gear ring 8 stop rotating the rotating disc 9, so that the rotating disc 9 cannot move all the sampling tubes 10. In the process of moving the sampling tube 10, the rubber belt 23 drives the sampling tube 10 to rotate quickly through the first ring 24. When the sampling tube 10 drives the third ring 33 to rotate, the third ring 33 drives the matching frame 28 to rotate. The matching frame 28 and the matching block 27 can effectively prevent the pull rope 14 from being knotted and entangled with the third ring 33, so that the sampling tube 10 rotates. The sampling tube 10 can better break the soil and better allow the sampling tube 10 to be inserted into the soil. When the sampling tube 10 is inserted into the soil, it is only necessary to tilt the sampling tube 10. At this time, the soil inside the sampling tube 10 will be broken by the sampling tube 10, and the soil will remain in the sampling tube 10. At this time, the sampling tube 10 needs to be removed from the soil. When it is necessary to take samples again for testing, the driving motor 5 is started again.

[0046] When the soil is broken, the sampling tube 10 is taken out from the soil, and the driving motor 5 is started again. The driving motor 5 drives the rotating disc 9 to rotate here through the gear 6 and the gear ring 8, and the rotating disc 9 drives all the abutment wheels 17 to move. When the abutment wheel 17 in the dislocation opening 15 moves to abut on the outer wall of the fixed disc 4, the abutment wheel 17 will drive the recovery wheel 16 to rotate, and the recovery wheel 16 recovers the pull rope 14, and the pull rope 14 pulls the sampling tube 10, and the sampling tube 10 is reset. At the same time, when the abutment wheel 17 abuts against the outer wall of the fixed disc 4, the two groups of first contraction arms 18 drive the two groups of closed semicircular tubes 19 to close through the rotating bar 12. At this time, the second spring 22 will also drive the two groups of closed semicircular tubes 19 to close. It is worth noting that when the two groups of closed semicircular tubes 19 are closed, the outer wall of the abutment wheel 17 abuts and rotates with the outer wall of the fixed disc 4. At this time, the abutment wheel 17 will pull the pull rope 14 through the recovery wheel 16. 4 is pulled, because the sliding block 34 and the connecting port of the incomplete threaded hole 29 are still at a certain distance, the sliding block 34 will be engaged with the corresponding inner wall of the incomplete threaded hole 29 only after the two groups of closed semicircular tubes 19 are closed. At this time, because the sampling tube 10 is still being pulled to reset, the sampling tube 10 will drive the sliding block 34 to move in the inner wall of the incomplete threaded hole 29 through the first ring 24. Since a complete threaded hole will be formed after the two groups of incomplete threaded holes 29 are closed, the sliding block 34 will move in the inner walls of the two groups of incomplete threaded holes 29. The sliding block 34 drives the sampling tube 10 to rotate through the first ring 24. At this time, the rubber belt 23 used will be wrapped around the outer wall of the sampling tube 10 to store power until the next group of abutment wheels 17 moves to the inside of the dislocation opening 15, so that soils at multiple locations can be sampled. When the sampling tube 10 moves to the position of the infrared spectrometer 3, the infrared spectrometer 3 will irradiate the soil and analyze the soil.

[0047] When the curved block on the outer wall of the abutting rubber sleeve 38 corresponding to the sampling tube 10 filled with soil abuts against the abutting rod 39, the gas inside the abutting rubber sleeve 38 enters the shrinking rubber sleeve 35, and the shrinking rubber sleeve 35 pushes the friction teeth 26 to move in the inner wall of the sampling tube 10, and the friction teeth 26 pushes the soil inside the sampling tube 10 out.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A soil nutrient detection device based on near infrared spectroscopy technology, characterized in that: The invention comprises a control handle (1), wherein the outer wall of the control handle (1) is fixedly connected to a fixed disc (4), and one end of the fixed disc (4) away from the control handle (1) is rotatably connected to a rotating disc (9), the outer wall of the rotating disc (9) is fixedly connected to a gear ring (8), and a driving motor (5) is fixedly installed at the bottom of the control handle (1), and the output end of the driving motor (5) is fixedly connected to a gear (6), and the gear (6) and the gear ring (8) are meshed with each other; A plurality of sampling mechanisms (101) capable of sampling soil are fixedly mounted inside the toothed ring (8), and a plurality of rotation assist mechanisms (201) are fixedly mounted on one end of the toothed ring (8) close to the fixed disc (4), and the rotation assist mechanisms (201) can rotate the sampling mechanisms (101) so that the sampling mechanisms (101) can better sample the soil. A discharge structure (301) capable of discharging soil is installed inside each group of the sampling mechanisms (101), and an infrared spectrometer (3) is fixedly mounted on the outer wall of the fixed disc (4), and the infrared spectrometer (3) can detect the soil inside the corresponding sampling mechanism (101).

2. The soil nutrient detection device based on near infrared spectroscopy technology according to claim 1 is characterized in that: The sampling mechanism (101) comprises two groups of first retractable arms (18), and the two groups of first retractable arms (18) are fixedly connected to the outer wall of the rotating disc (9), and the opposite ends of the two groups of first retractable arms (18) are fixedly connected to retractable rods (13), wherein one end of the retractable rod (13) of one group is fixedly connected to an abutment wheel (17) at a point away from the first retractable arm (18), and the outer wall of the fixed disc (4) is provided with a dislocation opening (15), the abutment wheel (17) is located inside the dislocation opening (15), and the end of the abutment wheel (17) is fixedly connected to a recovery wheel (16) at a point away from the first retractable arm (18).

3. The soil nutrient detection device based on near infrared spectroscopy technology according to claim 2 is characterized in that: The end of the recovery wheel (16) away from the abutment wheel (17) is fixedly connected to a matching round block (37), and the outer wall of the matching round block (37) is provided with a plurality of installation grooves, and each group of the installation grooves is fixedly connected to a reset spring, and the end of each group of the reset springs away from the inner wall of the installation groove is fixedly connected to an abutment ball (36), and the outer wall of a group of retractable rods (13) close to the matching circular tube (20) is fixedly connected to the matching circular tube (20), and the matching circular tube (20) is provided with a plurality of hemispherical grooves, and the outer wall of each group of abutment balls (36) is clamped in the inner wall of the corresponding hemispherical groove, and the outer wall of the recovery wheel (16) is fixedly connected to a pull rope (14).

4. The soil nutrient detection device based on near infrared spectroscopy technology according to claim 3 is characterized in that: A sampling tube (10) is arranged between the two groups of first retractable arms (18). The sampling tube (10) is slidably mounted inside the fixed disc (4). The end of the sampling tube (10) close to the abutment wheel (17) is fixedly connected to a third circular ring (33). The outer wall of the third circular ring (33) is fixedly connected to a matching frame (28). The end of the matching frame (28) away from the sampling tube (10) is rotatably connected to a matching block (27). The end of the matching block (27) away from the matching frame (28) is fixedly connected to a pull rope (14). A limited retractable strip (32) is fixedly connected between the third circular ring (33) and each group of first retractable arms (18). The outer wall of the sampling tube (10) is fixedly connected to a first circular ring (24).

5. The soil nutrient detection device based on near infrared spectroscopy technology according to claim 4 is characterized in that: A sliding block (34) is fixedly connected to the outer wall of the first circular ring (24), a plurality of rubber bands (23) are fixedly connected between the first circular ring (24) and the third circular ring (33), and a second circular ring (25) is rotatably connected to one end of the first circular ring (24) away from the third circular ring (33), a first spring (11) is fixedly connected between the second circular ring (25) and the fixed circular disk (4), and the inner wall of the second circular ring (25) is slidably connected to the outer wall of the sampling tube (10), and a closed semicircular tube (19) is fixedly connected between the second circular ring (25) and the rotating circular disk (9).

6. The soil nutrient detection device based on near infrared spectroscopy technology according to claim 1 is characterized in that: The rotation assist mechanism (201) comprises two groups of closed semicircular tubes (19), the outer wall of each group of closed semicircular tubes (19) being rotationally connected to a first retractable arm (18) via a rotation bar (12), and the two groups of closed semicircular tubes (19) being slidably connected to the outer wall of a rotating disc (9).

7. The soil nutrient detection device based on near infrared spectroscopy technology according to claim 6 is characterized in that: Two groups of second rotating arms (40) and first rotating arms (21) are rotatably connected between each two groups of the closed semicircular tubes (19), and each group of the second rotating arms (40) is rotatably connected to the corresponding first rotating arms (21). Two groups of second springs (22) are also fixedly connected between each two groups of the closed semicircular tubes (19), and an incomplete threaded hole (29) is provided in each group of the closed semicircular tubes (19) that are opposite to each other.

8. The soil nutrient detection device based on near infrared spectroscopy technology according to claim 1 is characterized in that: The unloading structure (301) comprises a shrinkable rubber sleeve (35), and the shrinkable rubber sleeve (35) is fixedly connected to the inner wall of the corresponding sampling tube (10), and one end of the shrinkable rubber sleeve (35) away from the inner wall of the sampling tube (10) is fixedly connected to a friction tooth (26), and the outer wall of the friction tooth (26) abuts against the inner wall of the sampling tube (10).

9. The soil nutrient detection device based on near infrared spectroscopy technology according to claim 8 is characterized in that: A plurality of abutting rubber sleeves (38) are fixedly connected to the outer wall of the rotating disc (9), and an arc block is fixedly connected to one end of the abutting rubber sleeve (38) away from the rotating disc (9), and each group of the abutting rubber sleeves (38) is fixedly connected to a corresponding shrinking rubber sleeve (35) through a pipeline, and an abutting rod (39) is fixedly connected to one end of the fixed disc (4) close to the abutting rubber sleeve (38).

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