Online measurement method and device for soil nutrient information

Abstract

The invention discloses a soil nutrient information on-line measurement method and device in the technical field of soil nutrient measurement. The soil nutrient information on-line measurement device comprises a mounting frame, a grip, an operation screen, a driving motor, a hollow driving pipe, a spiral drilling blade and a sampling barrel arranged on the surface of the driving pipe. By utilizing the sampling barrel, the driving pipe and the drilling blades, the sampling barrel can go deep into soil to isolate external air, so that the situation that nutrients in deep soil are taken out and are in contact with the air to be oxidized, and consequently the detection result is influenced is avoided, and an extracting solution is injected into the soil to preliminarily extract the soil; on one hand, nutrients in the soil can be leached out, the detection accuracy is improved to a certain extent, on the other hand, the humidity of the soil can be increased, full contact between the detection head and the soil is guaranteed, the detection result is guaranteed, detection can be directly carried out in the field, additional operation is not needed, the operation process is simplified, and the detection efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of soil nutrient measurement, and in particular to an online soil nutrient information measurement method and device. Background Art

[0002] Online soil nutrient measurement is a technology that uses sensors, the Internet of Things, or automated equipment to monitor key nutrients (such as nitrogen, phosphorus, potassium, pH, organic matter, etc.) in the soil in real time. It aims to provide data support for precision agriculture, environmental monitoring, or scientific research.

[0003] In the existing technology, when measuring soil nutrients online, the direct detection method of ion selective electrodes is usually used: this method inserts ion selective electrodes into the soil for detection, and the selective membrane on the surface of the ion selective electrode can make specific ions (such as 、 、 However, the test results are affected by soil texture, humidity, temperature, and the contact between the electrode and the soil, resulting in large deviations in the measurement results. Or use the chemical extraction test method: this method requires sampling the soil first, then using chemical extracts to extract the effective nutrients in the soil, and finally analyzing and testing with laboratory instruments. The sampling and transportation during the test process takes a long time, the test results cannot be obtained in time, and the test relies on laboratory equipment, which is difficult to test in the field. Summary of the Invention

[0004] The purpose of the present invention is to provide a method and device for online measurement of soil nutrient information to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: an online soil nutrient information measuring device, comprising a mounting frame, a handle, an operating screen, a drive motor, a hollow drive tube, a spiral drilling blade, a sampling barrel disposed on the surface of the drive tube, a liquid storage box mounted on the surface of the mounting frame and connected to the drive tube, and an electric valve disposed within the liquid storage box, wherein a plurality of detection heads controlled by an external driver are hingedly connected to the inner wall surface of the sampling barrel; The driving tube surface is provided with a plurality of water outlet holes, the bottom of the driving tube is provided with a drill bit with a hollow upper end, the drill bit surface is hinged with two fan-shaped sealing plates that can be expanded laterally, and the two sealing plates can seal the bottom of the sampling cylinder after being expanded, the inner wall of the sampling cylinder is provided with an annular groove, the inner wall of the groove is provided with two guide grooves with one end tilted upward, a rotating ring is rotatably connected in the groove, and two through grooves are provided on the surface of the rotating ring, and the side of the sealing plate passes through the through groove and extends into the guide groove.

[0006] As a further solution of the present invention, an inclined stirring rod is provided on the surface of the driving tube, and the stirring rod is located between the sealing plate and the drilling blade.

[0007] As a further solution of the present invention, the upper end surface of the sampling cylinder is provided with two through grooves that penetrate the side wall of the sampling cylinder and are connected to the groove, the sampling cylinder surface is rotatably connected with an adjusting ring, the inner surface of the adjusting ring is fixedly connected with two connecting rods that pass through the through grooves and are connected to the rotating ring, a plurality of blocks with inclined bottoms are fixedly connected to the inside of the driving tube, the drill bit rotates at the bottom of the driving tube, and the inside of the drill bit is connected to a synchronous ring that slides up and down, the surface of the synchronous ring is provided with a plurality of slots that engage with the blocks, and the surface of the drill bit is slidably connected to a lifting ring located above the sealing plate, and the sealing plate can cause the lifting ring to move when it is flipped, and the lifting ring is fixed inside A lifting block is fixedly connected, and the lifting block passes through the drill bit and extends to the bottom of the synchronous ring. A through-hole is provided on the surface of the drill bit corresponding to the position of the lifting block. An elastically retractable sealing block is connected between the lifting block and the through-hole. A fixing frame is fixedly installed on the surface of the driving tube, and a limiting groove is provided on the surface of the fixing frame. The sampling cylinder is rotatably connected to the fixing frame, and an elastically retractable limiting block is fixedly connected to the upper end of the sampling cylinder. An annular adjusting plate is provided at the upper end of the adjusting ring, and an arc groove passing through the adjusting plate is provided on the surface of the adjusting plate. The telescopic end of the limiting block slides in the arc groove through a movable column, and the rotation of the adjusting plate can shrink the limiting block through the arc groove and the movable column.

[0008] As a further solution of the present invention, the upper end of the synchronization ring is fixedly connected to a blocking cylinder extending into the interior of the driving tube, and a plurality of water-permeable holes arranged in a staggered manner with the water outlet holes are opened on the surface of the blocking cylinder.

[0009] As a further solution of the present invention, a spiral groove is provided on the surface of the driving tube, and a spiral blade is elastically slidably connected in the spiral groove. The spiral blade is located between the drilling blade and the stirring rod, and the upper end of the spiral blade is in contact with the bottom of the drilling blade. A vertical groove is provided on the surface of the driving tube that passes through the spiral groove, and an L-shaped blocking rod is elastically slidably connected in the vertical groove. The upper end of the blocking rod is above the fixed frame, and an arc block with an inclined end is fixedly connected to the inner surface of the adjustment plate. The movement of the arc block can squeeze the blocking rod to move upward, and the bottom of the blocking rod extends to the position of the spiral blade and blocks the spiral blade.

[0010] As a further solution of the present invention, the stirring rod slides on the surface of the driving tube, and the lifting ring is connected to the stirring rod via a connecting block.

[0011] As a further solution of the present invention, a blocking ring is fixedly connected to the surface of the rotating ring, and the blocking ring is used to block the detection head. A detection port is opened on the surface of the blocking ring.

[0012] As a further solution of the present invention, the bottom of the sampling tube is threadedly connected to a mounting ring, the bottom of the mounting ring is fixedly connected to a plurality of cutting teeth, the bottom of the tail end of the guide groove passes through a groove, the bottom of the through groove passes through a rotating ring, the adjustment plate is installed on the surface of the adjustment ring and the adjustment plate and the adjustment ring are detachable, and a detachable blocking block is installed on the surface of the movable column.

[0013] As a further solution of the present invention, the surface of the sampling tube is elastically slidably connected to a limit block, and the surface of the adjustment ring is provided with two limit grooves.

[0014] A soil nutrient information online measurement method, the specific steps of the method are as follows: Step 1: When measuring soil nutrients online, use the handle, drive motor, drive tube, drilling blade, drill bit and sampling tube to make the sampling tube penetrate deep into the soil; Step 2: Then use the adjusting ring, connecting rod and rotating ring to expand the sealing plate to seal the bottom of the sampling tube; Step 3: Then use the liquid storage box, electric valve, drive pipe and water outlet to inject the extract in the liquid storage box into the soil; Step 4: After the extract has leachated for a period of time, the external controller drives multiple detection heads to move into the soil to detect the nutrients leached into the soil; Step 5: The operation screen will collect and store the nutrient data measured by multiple detection heads.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention utilizes a sampling tube, a drive tube, and a drilling blade, so that the sampling tube can penetrate deep into the soil, isolating it from external air, and preventing nutrients extracted from the deep soil from coming into contact with air and being oxidized, thereby affecting the detection results. Furthermore, the extractant is injected into the soil to perform a preliminary extraction of the soil. On the one hand, this can leach nutrients from the soil, improving the accuracy of the detection to a certain extent. On the other hand, it can increase the humidity of the soil, ensuring sufficient contact between the detection head and the soil, ensuring the detection results. Furthermore, the detection can be performed directly in the field without the need for additional operations, simplifying the operation process and improving detection efficiency. During the process of measuring soil nutrient information, the stirring rod rotates synchronously with the rotation of the drive tube. The tilted stirring rod can cut and crush the soil that enters the sampling tube along the sealing plate, preventing the soil from being in a blocky state, which affects the subsequent extraction of nutrients from the soil by the extractant and the detection of the detection head. In the process of measuring soil nutrient information of the present invention, after drilling and sampling are completed, the sampling tube and the drill bit can be separated from the driving tube by using the adjustment ring and the adjustment plate, and the driving motor can be started again to drive the driving tube, the fixing frame and the stirring rod to rotate. The drill bit, the sampling tube and the sealing plate will not rotate with them, and the stirring rod can continue to stir and crush the soil, thereby facilitating the subsequent leaching and detection of soil nutrients. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a flow chart of the method of the present invention; Figure 2 It is a schematic diagram of the overall structure of the present invention; Figure 3 It is a schematic diagram of the overall structure of the present invention after being cut apart; Figure 4 for Figure 3 Schematic diagram of the structure at A in the middle; Figure 5 for Figure 3 Schematic diagram of the structure at B in the middle; Figure 6 This is a structural diagram of the connection relationship between the driving tube, the fixing frame, the sampling tube, the adjusting ring and the adjusting plate in the present invention; Figure 7 This is a structural diagram of the positional relationship among the sampling tube, the adjustment ring, and the connecting rod in the present invention; Figure 8 for Figure 7 Schematic diagram of the structure at C in the middle; Figure 9 Schematic diagram of the structure of the sampling tube after being cut open in the present invention; Figure 10 for Figure 9 Schematic diagram of the structure at D in the middle; Figure 11 Schematic diagram of the structure of the sampling tube and the driving tube after being cut apart in the present invention; Figure 12 for Figure 11 Schematic diagram of the structure at E in the middle; Figure 13 Schematic diagram of the connection between the adjusting ring, the connecting rod and the rotating ring in the present invention; Figure 14 This is a schematic structural diagram of the positional relationship among the driving tube, drilling blades, and spiral blades in the present invention; Figure 15 for Figure 14 Schematic diagram of the structure at F in the middle; Figure 16 This is a structural diagram of the connection relationship between the driving tube, the sealing plate and the rotating ring in the present invention; Figure 17 for Figure 16 Schematic diagram of the structure at G in the middle; Figure 18 for Figure 16 Schematic diagram of the structure at H in the middle; Figure 19 This is a structural diagram showing the positional relationship among the drive tube, synchronizer ring and blocking cylinder of the present invention; Figure 20 Schematic diagram of the explosion structure of the synchronization ring, lifting ring and drill bit in the present invention; Figure 21 It is a schematic structural diagram of the drive tube after being cut open in the present invention.

[0016] In the accompanying drawings, the components represented by the reference numerals are as follows: 1-mounting frame, 2-handle, 3-operation screen, 4-drive motor, 5-drive tube, 6-drilling blade, 7-sampling tube, 8-liquid storage box, 9-electric valve, 10-detection head, 11-water outlet, 12-drill bit, 13-sealing plate, 14-groove, 15-guide groove, 16-rotating ring, 17-through groove, 18-through groove, 19-adjusting ring, 20-connecting rod, 21-stirring rod, 22-block, 23-synchronizing ring, 24-slot, 25-lifting ring, 26- Lifting block, 27-through-hole, 28-sealing block, 29-fixing frame, 30-limiting groove, 31-limiting block, 32-adjusting plate, 33-arc groove, 34-moving column, 35-blocking cylinder, 36-water permeable hole, 37-spiral groove, 38-spiral leaf, 39-vertical groove, 40-blocking rod, 41-arc block, 42-connecting block, 43-blocking ring, 44-detection port, 45-mounting ring, 46-cutting teeth, 47-blocking block, 48-limiting block, 49-limiting groove. DETAILED DESCRIPTION

[0017] See also Figures 1-21The present invention provides a technical solution: an online soil nutrient information measuring device, comprising a mounting frame 1, a handle 2, an operating screen 3, a drive motor 4, a hollow drive tube 5, a spiral drilling blade 6, a sampling tube 7 disposed on the surface of the drive tube 5, a liquid storage box 8 mounted on the surface of the mounting frame 1 and connected to the drive tube 5, and an electric valve 9 disposed inside the liquid storage box 8. A plurality of detection heads 10 controlled by an external driver are hingedly connected to the inner wall surface of the sampling tube 7; A plurality of water outlet holes 11 are provided on the surface of the driving tube 5. A drill bit 12 with a hollow upper end is provided at the bottom of the driving tube 5. Two fan-shaped sealing plates 13 that can be expanded laterally are hinged on the surface of the drill bit 12. When the two sealing plates 13 are expanded, the bottom of the sampling tube 7 can be sealed. An annular groove 14 is provided on the inner wall of the sampling tube 7. Two guide grooves 15 with one end tilted upward are provided on the inner wall of the groove 14. A rotating ring 16 is rotatably connected in the groove 14. Two through grooves 17 are provided on the surface of the rotating ring 16. The side of the sealing plate 13 passes through the through groove 17 and extends into the guide groove 15. When measuring soil nutrient information in the field, the sampling tube 7 is placed upright on the ground using the handle 2 at a preset detection position. At this time, the sealing plate 13 is in an open state, and the sealing plate 13 is in an inclined state under the lifting effect of the tilted end of the guide groove 15. Then the driving motor 4 drives the driving tube 5, the drill bit 12, the drilling blade 6 and the sampling tube 7 to rotate synchronously. The sealing plate 13 rotates downwardly to cut into the soil and reduce resistance. The rotation of the drilling blade 6 can make the drilled soil move upward along the drilling blade 6, and the sampling tube 7 gradually penetrates into the soil. The inside of the soil, then when the sampling tube 7 reaches the preset depth, the soil at the preset depth enters the inside of the sampling tube 7, and then the drilling is stopped. The rotation of the rotating ring 16 can drive the sealing plate 13 to rotate through the through groove 17. The end of the sealing plate 13 will rotate to a horizontal state under the guidance of the guide groove 15 and gradually expand to seal the bottom of the sampling tube 7. The sealing plate 13 can seal the soil in the sampling tube to prevent the soil from escaping from the sampling tube during the subsequent measurement process. Then the electric valve 9 is opened, and the extracting liquid in the liquid storage box 8 passes through the electric valve 9 and the drive After the moving tube 5, it is injected into the soil through the water outlet 11. The nutrients in the soil can be leached by the extracting liquid. The sealing plate 13 can block the extracting liquid to prevent the extracting liquid from penetrating into the soil outside the sampling tube and affecting the detection results. After a period of leaching, the multiple detection heads 10 are driven by an external driver to rotate into the soil. The detection heads 10 can detect the soil at different positions in the sampling tube 7. The present invention uses the sampling tube 7, the driving tube 5 and the drilling blade 6 to enable the sampling tube 7 to penetrate deep into the soil, isolate the external air, and prevent the nutrients extracted from the deep soil from coming into contact with the air and oxidizing, thereby affecting the detection results. The extracting liquid is injected into the soil to perform preliminary extraction of the soil. On the one hand, it can leach the nutrients in the soil and improve the accuracy of the detection to a certain extent. On the other hand, it can increase the humidity of the soil, ensure sufficient contact between the detection head 10 and the soil, and ensure the detection results. In addition, the detection can be carried out directly in the field without the need for additional operations, simplifying the operation process and improving the detection efficiency. The operation screen 3 can statistically analyze the data detected by multiple detection heads 10.

[0018] In the process of measuring soil nutrient information, the soil cannot be broken when entering the sampling tube. As a further solution of the present invention, an inclined stirring rod 21 is provided on the surface of the driving tube 5. The stirring rod 21 is located between the sealing plate 13 and the drilling blade 6. During the measurement of soil nutrient information, the stirring rod 21 will rotate synchronously when the driving tube 5 rotates. The inclined stirring rod 21 can cut and crush the soil that enters the sampling tube 7 along the sealing plate 13, thereby preventing the soil from being in a blocky state and affecting the subsequent extraction of nutrients in the soil by the extractant and the detection of the detection head 10.

[0019] In the process of measuring soil nutrient information, the stirring rod 21 can only crush the soil during the sampling process, and cannot continuously stir the soil. As a further solution of the present invention, the upper end surface of the sampling cylinder 7 is provided with two through grooves 18 that penetrate the side wall of the sampling cylinder 7 and are connected to the groove 14. The surface of the sampling cylinder 7 is rotatably connected with an adjusting ring 19, and the inner surface of the adjusting ring 19 is fixedly connected with two connecting rods 20 that pass through the through grooves 18 and are connected to the rotating ring 16. A plurality of blocks 22 with inclined bottoms are fixedly connected to the inside of the driving tube 5, and the drill bit 12 rotates at the bottom of the driving tube 5. The inner side of the drill bit 12 is connected to a synchronous ring 23 that slides up and down. A plurality of slots 24 that engage with the blocks 22 are provided on the surface of the synchronous ring 23. The surface of the drill bit 12 is slidably connected with a lifting ring 25 located above the sealing plate 13. When the sealing plate 13 is flipped, The lifting ring 25 is enough to move. A lifting block 26 is fixedly connected to the inner side of the lifting ring 25. The lifting block 26 passes through the drill bit 12 and extends to the bottom of the synchronous ring 23. A through-hole 27 is provided on the surface of the drill bit 12 corresponding to the position of the lifting block 26. An elastically retractable sealing block 28 is connected between the lifting block 26 and the through-hole 27. A fixing frame 29 is fixedly installed on the surface of the driving tube 5. A limiting groove 30 is provided on the surface of the fixing frame 29. The sampling cylinder 7 is rotatably connected to the fixing frame 29. An elastically retractable limiting block 31 is fixedly connected to the upper end of the sampling cylinder 7. An annular adjusting plate 32 is provided on the upper end of the adjusting ring 19. An arc groove 33 passing through the adjusting plate 32 is provided on the surface of the adjusting plate 32. The telescopic end of the limiting block 31 slides in the arc groove 33 through the moving column 34. The rotation of the adjusting plate 32 can retract the limiting block 31 through the arc groove 33 and the moving column 34. In the process of measuring soil nutrient information, during drilling, the sealing plate 13 is in an inclined state, and the lifting ring 25 and the lifting block 26 are above the through-hole 27 under the top action of the sealing plate 13, and the lifting block 26 lifts the synchronous ring 23, the clamping block 22 and the clamping groove 24 are in a clamping state, and the limiting block 31 is in the limiting groove 30. Then, when the driving motor 4 drives the driving tube 5 to rotate, the driving tube 5 drives the drill bit 12 to rotate synchronously through the clamping block 22, the clamping groove 24 and the synchronous ring 23, and the driving tube 5 drives the sampling tube 7 to rotate synchronously through the fixing frame 29, the limiting groove 30 and the limiting block 31. Subsequently, after the drilling sampling is completed, when the adjusting ring 19 and the adjusting plate 32 are rotated, the adjusting ring 19 drives the connecting rod 20 and the rotating ring 16 Synchronously rotating, the adjustment plate 32 rotates so that the movable column 34, under the guidance of the arc groove 33, causes the limiting block 31 to contract and move out of the limiting groove 30. The sealing plate 13 rotates to a horizontal position and gradually expands under the guidance of the through groove 17 and the guide groove 15. The lifting ring 25 and the lifting block 26 move downward under the contraction of the sealing block 28. The synchronous ring 23 moves downward under the action of gravity, and the block 22 disengages from the groove 24. Then, after the sealing plate 13 closes the bottom of the sampling tube 7, the drive motor 4 can be started again to drive the drive tube 5, the fixing frame 29 and the stirring rod 21 to rotate. The drill bit 12, the sampling tube 7 and the sealing plate 13 will not rotate with it. The stirring rod 21 can continue to stir and crush the soil, thereby facilitating the subsequent leaching and detection of soil nutrients.

[0020] During the measurement of soil nutrient information and drilling sampling, soil can easily enter the driving tube 5 through the water outlet 11, causing blockage inside the driving tube 5. As a further solution of the present invention, a blocking cylinder 35 extending into the driving tube 5 is fixedly connected to the upper end of the synchronization ring 23. The blocking cylinder 35 has a plurality of water holes 36 arranged in a staggered manner with respect to the water outlet 11. In the process of measuring soil nutrient information, when drilling and sampling, the synchronous ring 23 is on the upper side of the lifting block 26, and the water hole 36 and the water outlet hole 11 are staggered. During the drilling process, the soil cannot enter the inside of the driving tube 5 through the water outlet hole 11, ensuring the unblocking of the inside of the driving tube 5. Then, after the drilling is completed, when the synchronous ring 23 and the blocking cylinder 35 move downward, the water hole 36 is connected with the water outlet hole 11, and the extract inside the driving tube can smoothly flow out from the water hole 36 and the water outlet hole 11.

[0021] In the process of measuring soil nutrient information, there is a lot of soil at the detection position after drilling, which is inconvenient for detection. As a further solution of the present invention, a spiral groove 37 is provided on the surface of the driving tube 5, and a spiral leaf 38 is elastically slidably connected in the spiral groove 37. The spiral leaf 38 is located between the drilling leaf 6 and the stirring rod 21, and the upper end of the spiral leaf 38 is in contact with the bottom of the drilling leaf 6. A vertical groove 39 is provided on the surface of the driving tube 5, which passes through the spiral groove 37. An L-shaped blocking rod 40 is elastically slidably connected in the vertical groove 39. The upper end of the blocking rod 40 is located above the fixing frame 29. An arc block 41 with an inclined end is fixedly connected to the inner surface of the adjustment plate 32. The movement of the arc block 41 can squeeze the blocking rod 40 to move upward, and the bottom of the blocking rod 40 extends to the position of the spiral leaf 38 and blocks the spiral leaf 38. During the drilling sampling process, the spiral blade 38 is blocked by the blocking rod 40. When the driving tube 5 drives the drilling blade 6 and the spiral blade 38 to rotate, the soil enters the sampling tube 7 and moves upward along the surface of the spiral blade 38 and the drilling blade 6. Then, after the drilling sampling is completed, when the sampling tube 7 stops penetrating into the soil, the drill bit 12 is released by rotating the adjusting ring 19 and the adjusting plate 32. When the synchronous rotation of the sampling tube 7 and the driving tube 5 is released, the arc block 41 rotates together under the drive of the adjusting plate 32. When the arc block 41 moves to the position of the blocking rod 40, the end of the arc block 41 moves from the bottom of the blocking rod 40 to squeeze and lift the blocking rod 40 upward. The bottom of the blocking rod 40 moves out of the range of the spiral groove 37 to release the obstruction to the spiral blade 38. At this time, the soil fills the sampling tube 7, and the spiral blade 38 is squeezed by the soil. It will not move upward along the spiral groove 37 immediately. Then, when the driving tube 5 drives the spiral blade 38 to rotate together with the drilling blade 6 again, the soil on the surface of the spiral blade 38 can continue to move upward along the surface of the spiral blade 38 and the drilling blade 6. The soil at the detection position can be pushed to move upward along the spiral blade 38 when the spiral blade 38 rotates. When the soil moves, the squeezing effect on the spiral blade 38 is weakened, and the spiral blade 38 can move upward along the spiral groove 37 with the soil. After the spiral blade 38 moves upward, a certain operating detection space can be reserved for the detection position, which is convenient for the stirring rod 21 to stir and crush the soil and the leaching of nutrients in the soil. In addition, the reduction of soil at the detection position can reduce the resistance to the movement of the detection head 10, so that the detection head 10 can move to the middle position of the soil for easy detection.

[0022] During the measurement of soil nutrient information, the position of the stirring rod 21 cannot be changed, making it difficult to stir the soil on the surface of the sealing plate 13. As a further solution of the present invention, the stirring rod 21 slides on the surface of the driving tube 5, and the lifting ring 25 is connected to the stirring rod 21 by a connecting block 42; During the measurement of soil nutrient information, the stirring rod 21 can cut and crush the soil passing through it. Then, after the sampling is completed, the sealing plate 13 is used to seal the bottom of the sampling tube 7 through the adjusting ring 19. The sealing plate 13 is rotated to a horizontal position, and the lifting ring 25 moves downward, and the stirring rod 21 is driven to move downward synchronously through the connecting block 42. After the stirring plate moves downward, it can stir and crush the soil near the sealing plate 13, which is convenient for the subsequent leaching and detection of nutrients in the soil.

[0023] During the soil drilling and sampling process, the soil is likely to come into contact with the detection head 10 when entering the sampling tube 7, thereby causing deviations in the detection data. As a further solution of the present invention, a shielding ring 43 is fixedly connected to the surface of the rotating ring 16. The shielding ring 43 is used to shield the detection head 10, and a detection port 44 is opened on the surface of the shielding ring 43; During the process of drilling and sampling the soil, the detection head 10 is blocked by the shielding ring 43, and the soil will not contact the detection head 10 when entering the sampling tube 7, so as to avoid the soil contacting the detection head 10 in advance during the sampling process to contaminate the detection head 10, thereby affecting the subsequent detection results of the detection head 10. After the drilling is completed, when the adjusting ring 19, the connecting rod 20 and the rotating ring 16 are rotated, the rotating ring 16 drives the shielding ring 43 to rotate, and the detection port 44 rotates to the position of the detection head 10, so as to facilitate the movement of the detection head 10.

[0024] During the process of measuring soil nutrient information, it is difficult to clean the interior of the sampling tube 7. As a further solution of the present invention, a mounting ring 45 is threadedly connected to the bottom of the sampling tube 7. A plurality of cutting teeth 46 are fixedly connected to the bottom of the mounting ring 45. The bottom of the tail end of the guide groove 15 passes through the groove 14. The bottom of the through groove 17 passes through the rotating ring 16. The adjusting plate 32 is mounted on the surface of the adjusting ring 19 and is detachable from the adjusting ring 19. A detachable blocking block 47 is mounted on the surface of the movable column 34. When cleaning is required after measuring the soil nutrient information, the mounting ring 45 at the bottom of the sampling barrel 7 can be disassembled and removed, and then the sealing plate 13 can be directly taken out from the tail end of the guide groove 15 and the bottom of the through groove 17 when it moves to the tail end of the guide groove 15. After the blocking block 47 is removed, the sampling barrel 7 and the adjusting plate 32 can be moved upward a part, which is convenient for operating the sealing plate 13. Then the adjusting ring 19 and the adjusting plate 32 are disassembled, and the sampling barrel 7 can be directly removed to expose the drilling leaves 6 and the spiral leaves 38, which is convenient for cleaning the surfaces of the drilling leaves 6 and the spiral leaves 38 and the soil inside the sampling barrel. The cutting teeth 46 can reduce the cutting resistance of the sampling barrel 7 when drilling the soil.

[0025] During the measurement of soil nutrient information, the adjusting ring 19 cannot remain stable after rotation. As a further solution of the present invention, the surface of the sampling tube 7 is elastically slidably connected to the limiting block 48, and the surface of the adjusting ring 19 is provided with two limiting grooves 49; During the process of drilling and sampling the soil, the adjusting ring 19 is restricted by the limiting block 48 through the limiting groove 49 to keep it stable. Then, when the adjusting ring 19 is rotated after sampling, the limiting block 48 needs to be pushed downward to move out of the limiting groove 49. The adjusting ring 19 is rotated to make the limiting block 48 move to another limiting groove 49 to restrict the adjusting ring 19 again, so that the adjusting ring 19 can remain stable after rotation, and avoids the adjusting ring 19 from rotating during the rotation of the driving tube 5 after the adjusting ring 19 is rotated, thereby affecting the sealing of the sealing plate 13 on the sampling tube 7, resulting in a large deviation in the detection result. A soil nutrient information online measurement method, the specific steps of the method are as follows: Step 1: When measuring soil nutrients online, use the handle 2, drive motor 4, drive tube 5, drilling blade 6, drill bit 12 and sampling tube 7 to allow the sampling tube 7 to penetrate deep into the soil; Step 2: Then use the adjusting ring 19, the connecting rod 20 and the rotating ring 16 to expand the sealing plate 13 to seal the bottom of the sampling tube 7; Step 3: Then, use the liquid storage box 8, electric valve 9, drive pipe 5 and water outlet 11 to inject the extract in the liquid storage box 8 into the soil; Step 4: After the extract has leached for a period of time, the external controller drives the multiple detection heads 10 to move into the soil to detect the nutrients leached into the soil; Step 5: The operation screen 3 collects and stores the nutrient data measured by the multiple detection heads 10 .

Claims

1. A soil nutrient information online measuring device, comprising a mounting frame (1), a handle (2), an operating screen (3), a driving motor (4), a hollow driving tube (5), a spiral drilling blade (6), a sampling tube (7) arranged on the surface of the driving tube (5), a liquid storage box (8) mounted on the surface of the mounting frame (1) and connected to the driving tube (5), and an electric valve (9) arranged inside the liquid storage box (8), wherein a plurality of detection heads (10) controlled by an external driver are hinged on the inner wall surface of the sampling tube (7); characterized in that: The driving tube (5) is provided with a plurality of water outlet holes (11) on its surface. The driving tube (5) is provided with a drill bit (12) with a hollow upper end at its bottom. Two fan-shaped sealing plates (13) that can be expanded laterally are hinged on the surface of the drill bit (12). The two sealing plates (13) can seal the bottom of the sampling tube (7) after being expanded. The inner wall of the sampling tube (7) is provided with an annular groove (14). The inner wall of the groove (14) is provided with two guide grooves (15) with one end tilted upward. A rotating ring (16) is rotatably connected in the groove (14). Two through grooves (17) are provided on the surface of the rotating ring (16). The side of the sealing plate (13) passes through the through groove (17) and extends into the guide groove (15).

2. The soil nutrient information online measurement device according to claim 1, characterized in that: An inclined stirring rod (21) is provided on the surface of the driving tube (5), and the stirring rod (21) is located between the sealing plate (13) and the drilling blade (6).

3. The online soil nutrient information measuring device according to claim 2, characterized in that: The upper end surface of the sampling cylinder (7) is provided with two through grooves (18) that penetrate the side wall of the sampling cylinder (7) and communicate with the groove (14); the surface of the sampling cylinder (7) is rotatably connected to an adjusting ring (19); the inner surface of the adjusting ring (19) is fixedly connected to two connecting rods (20) that penetrate the through grooves (18) and are connected to the rotating ring (16); the inside of the driving tube (5) is fixedly connected to a plurality of blocks (22) with inclined bottoms; the drill bit (12) rotates at the bottom of the driving tube (5); the inner side of the drill bit (12) is slidably connected to a synchronous ring (23); the surface of the synchronous ring (23) is provided with a plurality of card grooves (24) that engage with the card blocks (22); the surface of the drill bit (12) is slidably connected to a lifting ring (25) located above the sealing plate (13); when the sealing plate (13) is turned over, it can act to move the lifting ring (25); the inner side of the lifting ring (25) is fixedly connected to a lifting block (26); the lifting block (26) passes through the drill bit (12) and extends to the bottom of the synchronization ring (23). A through hole (27) is provided on the surface of the drill bit (12) at a position corresponding to the lifting block (26). An elastically retractable sealing block (28) is connected between the lifting block (26) and the through hole (27). A fixing frame (29) is fixedly installed on the surface of the driving tube (5). A limiting groove (30) is provided on the surface of the fixing frame (29). The sampling tube (7) is rotatably connected to the fixing frame (29). The upper end of the sampling tube (7) is fixedly connected to an elastically retractable limiting block (31), and the upper end of the adjusting ring (19) is provided with an annular adjusting plate (32). The surface of the adjusting plate (32) is provided with an arc groove (33) that penetrates the adjusting plate (32). The retractable end of the limiting block (31) slides in the arc groove (33) through the movable column (34). The rotation of the adjusting plate (32) can cause the limiting block (31) to retract through the arc groove (33) and the movable column (34).

4. The online soil nutrient information measuring device according to claim 3, characterized in that: The upper end of the synchronization ring (23) is fixedly connected to a blocking cylinder (35) extending into the interior of the driving tube (5), and a plurality of water-permeable holes (36) arranged in a staggered arrangement with the water outlet holes (11) are formed on the surface of the blocking cylinder (35).

5. The online soil nutrient information measuring device according to claim 3, characterized in that: The driving tube (5) is provided with a spiral groove (37) on its surface, and a spiral leaf (38) is elastically slidably connected in the spiral groove (37). The spiral leaf (38) is located between the drilling leaf (6) and the stirring rod (21), and the upper end of the spiral leaf (38) is in contact with the bottom of the drilling leaf (6). The driving tube (5) is provided with a vertical groove (39) penetrating the spiral groove (37). An L-shaped blocking rod (40) is elastically slidably connected in the vertical groove (39). The upper end of the blocking rod (40) is located above the fixing frame (29). The inner surface of the adjusting plate (32) is fixedly connected with an arc block (41) with an inclined end. The arc block (41) can squeeze the blocking rod (40) to move upward when it moves, and the bottom of the blocking rod (40) extends to the position of the spiral leaf (38) and blocks the spiral leaf (38).

6. The online soil nutrient information measuring device according to claim 3, characterized in that: The stirring rod (21) slides on the surface of the driving tube (5), and the lifting ring (25) is connected to the stirring rod (21) via a connecting block (42).

7. The online soil nutrient information measuring device according to claim 1, characterized in that: A shielding ring (43) is fixedly connected to the surface of the rotating ring (16), and the shielding ring (43) is used to shield the detection head (10). A detection port (44) is provided on the surface of the shielding ring (43).

8. The online soil nutrient information measuring device according to claim 3, characterized in that: The bottom of the sampling tube (7) is threadedly connected to a mounting ring (45), and the bottom of the mounting ring (45) is fixedly connected to a plurality of cutting teeth (46). The bottom of the tail end of the guide groove (15) passes through the groove (14), and the bottom of the through groove (17) passes through the rotating ring (16). The adjusting plate (32) is installed on the surface of the adjusting ring (19) and the adjusting plate (32) and the adjusting ring (19) are detachable. A detachable blocking block (47) is installed on the surface of the movable column (34).

9. The online soil nutrient information measuring device according to claim 1, characterized in that: The surface of the sampling tube (7) is elastically slidably connected to a limiting block (48), and the surface of the adjustment ring (19) is provided with two limiting grooves (49).

10. Step 1: When measuring soil nutrients online, use the handle (2), the drive motor (4), the drive tube (5), the drilling blade (6), the drill bit (12) and the sampling tube (7) to allow the sampling tube (7) to penetrate deep into the soil; Step 2: Then, using the adjusting ring (19), the connecting rod (20) and the rotating ring (16), the sealing plate (13) is unfolded to seal the bottom of the sampling tube (7); Step 3: Then, the extract in the liquid storage box (8) is injected into the soil using the liquid storage box (8), the electric valve (9), the drive tube (5) and the water outlet (11); Step 4: After the extract has been leached for a period of time, the external controller drives the plurality of detection heads (10) to move into the soil to detect the nutrients leached into the soil; Step 5: The operation screen (3) collects and stores the nutrient data measured by the multiple detection heads (10).

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