Soil erosion thickness measuring instrument

By designing a marker pole and splicing pole structure, and utilizing a bevel gear system and the oblique insertion of reinforcing feet, the measurement error problem caused by the tilt of the marker stake was solved, thus achieving accuracy and convenience in measuring soil erosion thickness.

CN121977412APending Publication Date: 2026-05-05SHANDONG UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG UNIV OF TECH
Filing Date
2026-03-23
Publication Date
2026-05-05

AI Technical Summary

Technical Problem

In existing technologies, marker stakes are prone to tilting during soil erosion, leading to inaccurate measurement data and affecting the measurement results of soil erosion thickness.

Method used

A soil erosion thickness measuring instrument was designed, which adopts a marking rod and splicing rod structure. The bevel gear system is driven by rotating the fixing knob, so that the reinforcing foot is inserted into the soil at an angle. Combined with the adjusting ring and positioning plate, it can achieve rapid calibration and fixation, prevent the device from tilting, and achieve rapid disassembly and installation through splicing components.

Benefits of technology

It effectively prevents the device from tilting due to soil erosion, ensures the accuracy of measurement data, and improves the convenience and ease of storage of the device.

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Abstract

The invention discloses a soil erosion thickness measuring instrument, and relates to the field of soil thickness monitoring, the soil erosion thickness measuring instrument comprises a marking rod and a splicing rod, the bottom end of the marking rod is provided with a splicing groove, the top end of the splicing rod is fixedly connected with the bottom end of the marking rod through a splicing assembly, the bottom end of the splicing rod is fixedly provided with a fixed rod, and the lower side of the splicing rod is provided with a plurality of telescopic ports. According to the marking device, the fixing rotary knob is rotated, the fixing rotary knob drives the driving rod to rotate, the driving rod drives the first-stage bevel gear to rotate, the first-stage bevel gear drives the second-stage bevel gear to rotate, the second-stage bevel gear drives the transmission rod to rotate, and the transmission rod drives the fixing threaded rod to rotate; the rotating block drives the reinforcing feet to diffuse outwards with the fixing rod as the center, so that the reinforcing feet are obliquely inserted into the soil, the device is reinforced, and the problem that the device is inclined due to external conditions such as soil erosion during measurement, and the measurement result is affected is solved.
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Description

Technical Field

[0001] This invention relates to the field of soil thickness monitoring, and in particular to a soil erosion thickness measuring instrument. Background Technology

[0002] Soil erosion thickness refers to the thickness of the soil layer that is eroded and displaced within a unit of time under the combined effects of natural stresses (such as water, wind, gravity, and freeze-thaw cycles) and human activities. Soil erosion thickness is one of the important indicators for measuring the degree of soil erosion. Therefore, it is necessary to measure soil thickness regularly to assess its effectiveness in formulating soil and water conservation measures. When measuring soil, the erosion needle method is usually used, and stakes are required during the measurement.

[0003] In existing technologies, when using the erosion needle method for measurement, a flat wooden board is first placed at the slope marker position. A screwdriver with a diameter equal to that of the marker is drilled into the soil through the hole in the board and then screwed out in the opposite direction. The marker is then inserted and gently tapped into the soil with a hammer until the marker head is close to the wooden board. The board is then removed. At the same time, the distance from the top of the marker to the topsoil on the right side of the slope is measured. After a certain period of time (such as one or two years), the distance from the top of the marker to the topsoil on the right side is measured again. The difference between the two distances is the measured soil erosion thickness on the slope. In actual use, the marker may be affected by soil erosion, resulting in a large loss of soil fixed at its base, which may cause the marker to tilt. After the marker tilts, its measured height position will change, thus affecting the data when measuring again. Therefore, we disclose a soil erosion thickness measuring instrument to meet people's needs. Summary of the Invention

[0004] The purpose of this application is to provide a soil erosion thickness measuring instrument to solve the problem of soil thickness monitoring mentioned in the background art.

[0005] To achieve the above objectives, this application provides the following technical solution: a soil erosion thickness measuring instrument, comprising a marking rod and a splicing rod, wherein the bottom end of the marking rod is provided with a splicing groove, the top end of the splicing rod is fixedly connected to the bottom end of the marking rod through a splicing assembly, a fixing rod is fixedly installed at the bottom end of the splicing rod, and a plurality of telescopic openings are provided on the lower side of the splicing rod, wherein a stabilizing assembly for vertical stabilization of the marking rod is slidably installed in the plurality of telescopic openings; The stabilizing component includes several rotating blocks, which are slidably installed in several telescopic openings. Each rotating block has a reinforcing foot fixedly installed at its bottom end. A cavity is formed inside the splicing rod, and a limiting piece is slidably installed in the cavity. A connecting block is fixedly installed on the lower side of the limiting piece. Several lifting blocks are fixedly installed on the surface of the connecting block. The bottom ends of the lifting blocks are rotatably connected to the top ends of the rotating blocks. A drive unit for extending and retracting the reinforcing feet is rotatably installed on the inner bottom wall of the cavity.

[0006] Preferably, the drive unit includes a fixed threaded rod, which is rotatably mounted on the inner bottom wall of the cavity. The connecting block is screwed onto the surface of the fixed threaded rod. The upper side of the limiting plate has a clearance hole for avoiding the fixed threaded rod. One side of the splicing rod has a drive hole, and a drive rod is rotatably mounted in the drive hole. A first-stage bevel gear is fixedly mounted at one end of the drive rod. A transmission rod is fixedly mounted at the top end of the fixed threaded rod. A second-stage bevel gear is fixedly mounted on the surface of the transmission rod. The first-stage bevel gear meshes with the second-stage bevel gear. A fixing knob is fixedly mounted at the other end of the drive rod.

[0007] Preferably, the surface of the fixing rod is provided with a plurality of guide grooves, and a guide block for guiding the reinforcing foot is fixedly installed in each of the plurality of guide grooves.

[0008] Preferably, a mounting groove is provided on one side of the marking rod, a scale is fixedly installed in the mounting groove, an adjusting ring is slidably installed on the surface of the marking rod, and a positioning plate is fixedly installed on one side of the adjusting ring.

[0009] Preferably, the marking rod has several positioning grooves on both sides, the adjusting ring has sliding openings on both sides, a moving block is slidably installed in each of the two sliding openings, an L-shaped plate is fixedly installed on one side of each of the two moving blocks, two spring rods are fixedly installed on the opposite sides of each of the two L-shaped plates, and the same positioning block is fixedly installed at the other end of each of the two spring rods.

[0010] Preferably, the sliding opening has an installation groove, an adjusting block is slidably installed in the installation groove, and two rotating rods are rotatably installed on the inner wall of the adjusting block, with the other ends of the two rotating rods rotatably installed on one side of the two moving blocks respectively.

[0011] Preferably, a rotating hole is provided on one side of the adjusting ring, an adjusting threaded rod is rotatably installed in the rotating hole, the adjusting block is screwed onto the surface of the adjusting threaded rod, and an adjusting port for rotation is provided at one end of the adjusting threaded rod.

[0012] Preferably, the splicing assembly includes a splicing block, which is fixedly installed on the top of the splicing rod. A sliding groove is provided on one side of the marking rod, and a connecting hole is provided in the sliding groove. A plug rod is slidably installed in the connecting hole. A plug groove is provided on one side of the splicing block, and a reset unit is fixedly installed on the other end of the plug rod.

[0013] Preferably, the reset unit includes a slider, which is fixedly installed at one end of the plug rod and slidably installed in a sliding groove. A slide rod is fixedly installed on one side of the slider, a baffle is fixedly installed in the sliding groove, the slide rod is slidably installed on the baffle, a compression spring is sleeved on the surface of the slide rod, and a magnetic suction hole is opened at one end of the slide rod.

[0014] Preferably, a platform is fixedly installed at the top of the marking rod, and a label plate is fixedly installed on the upper side of the platform.

[0015] In summary, the technical effects and advantages of this invention are as follows: 1. In this invention, rotating the fixed knob drives the drive rod to rotate, which in turn drives the first-stage bevel gear to rotate. The first-stage bevel gear drives the second-stage bevel gear to rotate, which in turn drives the transmission rod to rotate. The transmission rod drives the fixed threaded rod to rotate, which in turn drives the connecting block to move. The connecting block drives the lifting block to move downward, which in turn drives the rotating block to move downward. The rotating block drives the reinforcing feet to move downward, causing the four reinforcing feet to extend and insert into the soil. During the extension process, when the rotating block moves and adheres to the guide block of the fixed rod, it is squeezed by the guide block, causing the rotating block to rotate. The rotating block drives the reinforcing feet to spread outward from the fixed rod as the center, causing them to insert obliquely into the soil, thus reinforcing the device and preventing the device from tilting due to soil erosion or other external conditions during measurement, which could affect the measurement results.

[0016] 2. In this invention, an adjusting rod is inserted into the adjusting port. Rotating the adjusting rod causes the adjusting threaded rod to rotate, which in turn causes the adjusting block to move. The adjusting block then causes two rotating rods to rotate, gradually increasing the angle between them. The two rotating rods then cause two moving blocks to move away from each other, while the two moving blocks cause two L-shaped plates to move closer together. The two L-shaped plates, via spring rods, cause the positioning blocks to move, disengaging them from the positioning slots and unlocking the adjusting ring. The ring is then moved up and down according to the calibrated dimensions and a ruler. This causes the positioning plates to move up and down until the calibrated position is reached. Afterward, the adjusting threaded rod is rotated in the opposite direction to re-insert the two positioning blocks into the positioning slots, fixing the positioning plates in place. The distance from the positioning plates to the soil is recorded, achieving the effect of rapid calibration and measurement data.

[0017] 3. In this invention, the sliding rod drives the sliding piece to move, and the sliding piece drives the insertion rod to move, causing the insertion rod to retract into the sliding groove. Then, the splicing block at the top of the splicing rod is inserted into the splicing groove of the marking rod, and the insertion hole is aligned with the insertion rod. The sliding rod is released, and the sliding piece is driven to move by the compression spring. The sliding piece drives the insertion rod to move, so that the insertion rod is inserted into the splicing hole, thereby fixing the insertion block. This achieves the effect of quick disassembly and installation of the device, and improves the ease of storage when not in use. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional view of the adjusting ring in this invention; Figure 3 This is a schematic diagram of the scale and its related structures in this invention; Figure 4 This is a cross-sectional view of the splicing component in this invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the splicing rod in this invention; Figure 6 for Figure 5 A magnified schematic diagram of the structure of region A in the middle.

[0020] In the diagram: 1. Marking rod; 2. Splicing rod; 3. Fixing rod; 4. Rotating block; 5. Reinforcing foot; 6. Limiting piece; 7. Connecting block; 8. Lifting block; 9. Transmission rod; 10. Drive rod; 11. First-stage bevel gear; 12. Second-stage bevel gear; 13. Fixing threaded rod; 14. Fixing knob; 15. Guide block; 16. Adjusting ring; 17. Moving block; 18. L-shaped plate; 19. Spring rod; 20. Positioning block; 21. Rotating rod; 22. Adjusting block; 23. Adjusting threaded rod; 24. Adjusting port; 25. Positioning plate; 26. Scale; 27. Splicing block; 28. Insertion rod; 29. ​​Sliding piece; 30. Sliding rod; 31. Baffle; 32. Compression spring; 33. Magnetic hole; 34. Platform; 35. Label plate. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1-6 The embodiments provided by the present invention are as follows: A soil erosion thickness measuring instrument includes a marking rod 1 and a splicing rod 2. The bottom end of the marking rod 1 is provided with a splicing groove. The top end of the splicing rod 2 is fixedly connected to the bottom end of the marking rod 1 through a splicing component. A fixing rod 3 is fixedly installed at the bottom end of the splicing rod 2. Several telescopic openings are provided on the lower side of the splicing rod 2. A stabilizing component for vertical stabilization of the marking rod 1 is slidably installed in the several telescopic openings. The stabilizing component includes several rotating blocks 4, which are slidably installed in several telescopic openings. Each rotating block 4 has a reinforcing foot 5 fixedly installed at its bottom end. The splicing rod 2 has a cavity inside, in which a limiting piece 6 is slidably installed. A connecting block 7 is fixedly installed on the lower side of the limiting piece 6. Several lifting blocks 8 are fixedly installed on the surface of the connecting block 7. The bottom ends of the lifting blocks 8 are rotatably connected to the top ends of the rotating blocks 4. A drive unit for extending and retracting the reinforcing feet 5 is rotatably installed on the inner bottom wall of the cavity. The bottom end of the marking rod 1 has four telescopic openings, in which a rotating block 4 is installed. Each rotating block 4 has a reinforcing foot 5 fixedly installed at its bottom end. The reinforcing foot 5 is conical to facilitate fixing when inserted into the soil.

[0023] like Figure 5 and Figure 6 As shown, the drive unit includes a fixed threaded rod 13, which is rotatably mounted on the inner bottom wall of the cavity. A connecting block 7 is screwed onto the surface of the fixed threaded rod 13. A clearance hole for avoiding the fixed threaded rod 13 is provided on the upper side of the limiting plate 6. A drive hole is provided on one side of the splicing rod 2. A drive rod 10 is rotatably mounted in the drive hole. A first-stage bevel gear 11 is fixedly mounted on one end of the drive rod 10. A transmission rod 9 is fixedly mounted on the top end of the fixed threaded rod 13. A second-stage bevel gear 12 is fixedly mounted on the surface of the transmission rod 9. The first-stage bevel gear 11 meshes with the second-stage bevel gear 12. A fixed knob 14 is fixedly mounted on the other end of the drive rod 10. The cavity is cuboid in shape, and its limiting plate 6 is rectangular, with its side fitting against the cavity.

[0024] like Figure 5As shown, the surface of the fixing rod 3 is provided with several guide grooves, and guide blocks 15 for guiding the reinforcing foot 5 are fixedly installed in each of the guide grooves. The guide blocks 15 are triangular, and their inclined surfaces can guide the rotating block 4 to rotate. The rotating block 4 can drive the reinforcing foot 5 to tilt and insert while moving downward, thereby increasing the fixing stability.

[0025] like Figure 3 As shown, a mounting groove is provided on one side of the marking rod 1, and a scale 26 is fixedly installed in the mounting groove. An adjusting ring 16 is slidably installed on the surface of the marking rod 1, and a positioning plate 25 is fixedly installed on one side of the adjusting ring 16. The scale 26 has scale lines on its surface. When performing measurement calibration, the distance from the bottom of the positioning plate 25 to the soil surface of the measurement area should be measured quickly.

[0026] like Figure 2 As shown, several positioning grooves are provided on both sides of the marking rod 1, and sliding openings are provided on both sides of the adjusting ring 16. Moving blocks 17 are slidably installed in both sliding openings. L-shaped plates 18 are fixedly installed on one side of each of the two moving blocks 17. Two spring rods 19 are fixedly installed on the opposite sides of the two L-shaped plates 18. The same positioning block 20 is fixedly installed at the other end of each of the two spring rods 19. An installation groove is provided in the sliding opening, and an adjusting block 22 is slidably installed in the installation groove. Two rotating rods 21 are rotatably installed on the inner wall of the adjusting block 22. The other ends of the two rotating rods 21 are rotatably installed on one side of each of the two moving blocks 17. A rotating hole is provided on one side of the adjusting ring 16, and an adjusting threaded rod 23 is rotatably installed in the rotating hole. The adjusting block 22 is screwed onto the surface of the adjusting threaded rod 23. An adjusting port 24 for rotation is provided at one end of the adjusting threaded rod 23.

[0027] like Figure 4 As shown, the splicing assembly includes a splicing block 27, which is fixedly installed on the top of the splicing rod 2. A sliding groove is provided on one side of the marking rod 1, and a connecting hole is provided in the sliding groove. A plug-in rod 28 is slidably installed in the connecting hole. A plug-in groove is provided on one side of the splicing block 27, and a reset unit is fixedly installed on the other end of the plug-in rod 28. The reset unit includes a slider 29, which is fixedly installed on one end of the plug-in rod 28 and slidably installed in the sliding groove. A slide rod 30 is fixedly installed on one side of the slider 29, and a baffle 31 is fixedly installed in the sliding groove. The slide rod 30 is slidably installed on the baffle 31. A compression spring 32 is sleeved on the surface of the slide rod 30, and a magnetic attraction hole 33 is provided at one end of the slide rod 30. A magnet is provided in the magnetic attraction hole 33. By inserting a measured magnetic rod, the magnet can be attracted, thereby pulling out the slide rod 30, effectively avoiding accidental contact.

[0028] like Figure 1 As shown, a platform 34 is fixedly installed at the top of the marker rod 1, and a label plate 35 is fixedly installed on the upper side of the platform 34.

[0029] Working principle of this invention: When using the device, first insert the magnetic rod into the magnetic hole 33 and pull the slide rod 30. The slide rod 30 drives the slide piece 29 to move, and the slide piece 29 drives the insertion rod 28 to move, so that the insertion rod 28 retracts into the groove. Then, insert the splicing block 27 at the top of the splicing rod 2 into the splicing groove of the marking rod 1, and align the insertion hole with the insertion rod 28. Release the slide rod 30, and the action of the compression spring 32 drives the slide piece 29 to move. The slide piece 29 drives the insertion rod 28 to move, so that the insertion rod 28 is inserted into the splicing hole, thereby fixing the insertion block and completing the connection between the marking rod 1 and the splicing rod 2. Next, insert the fixing rod 3 into the soil to be measured. After the fixing rod 3 and splicing rod 2 are fully inserted into the soil, part the soil appropriately to expose the fixing knob 14. Then rotate the fixing knob 14. The fixing knob 14 drives the drive rod 10 to rotate. The drive rod 10 drives the first-stage bevel gear 11 to rotate. The first-stage bevel gear 11 drives the second-stage bevel gear 12 to rotate. The second-stage bevel gear 12 drives the transmission rod 9 to rotate. The transmission rod 9 drives the fixing threaded rod 13 to rotate. The fixing threaded rod 13 drives the connecting block 7 to move. The connecting block 7 drives the lifting block 8 to move downward. The lifting block 8 drives the rotating block 4 to move downward. The rotating block 4 drives the reinforcing feet 5 to move downward, so that the four reinforcing feet 5 extend and insert into the soil. During the extension process, when the rotating block 4 moves and fits against the guide block 15 of the fixing rod 3, it is squeezed by the guide block 15, causing the rotating block 4 to rotate. The rotating block 4 drives the reinforcing feet 5 to spread outward from the fixing rod 3 as the center, so that they are inserted into the soil at an angle, completing the reinforcement of the device. Then, the soil is backfilled to hide the fixing knob 14. Next, measure the soil thickness in the area as needed. Insert the adjusting rod into the adjusting port 24 and rotate the adjusting rod. The adjusting rod drives the adjusting threaded rod 23 to rotate, which in turn drives the adjusting block 22 to move. The adjusting block 22 drives the two rotating rods 21 to rotate, gradually increasing the angle between the two rotating rods 21. The two rotating rods 21 drive the two moving blocks 17 to move away from each other, and the two moving blocks 17 drive the two L-shaped plates 18 to move closer to each other. The two L-shaped plates 18 drive the positioning block 20 to move through the spring rod 19, causing the positioning block 20 to disengage from the positioning groove. Unlock the adjusting ring 16. Move the adjusting ring 16 up and down according to the calibrated dimensions and the scale 26. The adjusting ring 16 drives the positioning plate 25 up and down to adjust to the calibrated position. Then, rotate the adjusting threaded rod 23 in the opposite direction to re-insert the two positioning blocks 20 into the positioning groove and fix the positioning plate 25. Record the distance from the positioning plate 25 to the soil and fill in the calibration information and measurement date on the label plate 35 for recording. Once the measurement date has arrived, the distance from the positioning plate 25 to the soil is remeasured, and the difference is calculated with the calibration data to obtain the soil erosion thickness data.

[0030] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A soil erosion thickness measuring instrument, comprising a marking rod and a splicing rod, characterized in that: The bottom end of the marker rod is provided with a splicing groove. The top end of the splicing rod is fixedly connected to the bottom end of the marker rod through a splicing assembly. A fixing rod is fixedly installed at the bottom end of the splicing rod. Several telescopic openings are provided on the lower side of the splicing rod. A stabilizing assembly for vertical stability of the marker rod is slidably installed in the several telescopic openings. The stabilizing component includes several rotating blocks, which are slidably installed in several telescopic openings. Each rotating block has a reinforcing foot fixedly installed at its bottom end. A cavity is formed inside the splicing rod, and a limiting piece is slidably installed in the cavity. A connecting block is fixedly installed on the lower side of the limiting piece. Several lifting blocks are fixedly installed on the surface of the connecting block. The bottom ends of the lifting blocks are rotatably connected to the top ends of the rotating blocks. A drive unit for extending and retracting the reinforcing feet is rotatably installed on the inner bottom wall of the cavity.

2. The soil erosion thickness measuring instrument according to claim 1, characterized in that: The drive unit includes a fixed threaded rod, which is rotatably mounted on the inner bottom wall of the cavity. The connecting block is screwed onto the surface of the fixed threaded rod. The upper side of the limiting plate has a clearance hole for avoiding the fixed threaded rod. One side of the splicing rod has a drive hole, in which a drive rod is rotatably mounted. One end of the drive rod is fixedly mounted with a primary bevel gear. The top end of the fixed threaded rod is fixedly mounted with a transmission rod. The surface of the transmission rod is fixedly mounted with a secondary bevel gear. The primary bevel gear meshes with the secondary bevel gear. The other end of the drive rod is fixedly mounted with a fixing knob.

3. The soil erosion thickness measuring instrument according to claim 1, characterized in that: The surface of the fixing rod is provided with several guide grooves, and guide blocks for guiding the reinforcing feet are fixedly installed in each of the several guide grooves.

4. The soil erosion thickness measuring instrument according to claim 1, characterized in that: The marking rod has a mounting groove on one side, and a scale is fixedly installed in the mounting groove. An adjusting ring is slidably installed on the surface of the marking rod, and a positioning plate is fixedly installed on one side of the adjusting ring.

5. A soil erosion thickness measuring instrument according to claim 4, characterized in that: The marking rod has several positioning grooves on both sides, the adjusting ring has sliding openings on both sides, a moving block is slidably installed in each of the two sliding openings, an L-shaped plate is fixedly installed on one side of each of the two moving blocks, two spring rods are fixedly installed on the opposite sides of each of the two L-shaped plates, and the same positioning block is fixedly installed on the other end of each of the two spring rods.

6. A soil erosion thickness measuring instrument according to claim 5, characterized in that: An installation groove is provided in the sliding opening, and an adjusting block is slidably installed in the installation groove. Two rotating rods are rotatably installed on the inner wall of the adjusting block, and the other ends of the two rotating rods are rotatably installed on one side of the two moving blocks respectively.

7. A soil erosion thickness measuring instrument according to claim 6, characterized in that: A rotating hole is provided on one side of the adjusting ring, and an adjusting threaded rod is rotatably installed in the rotating hole. The adjusting block is screwed onto the surface of the adjusting threaded rod, and an adjusting port for rotation is provided at one end of the adjusting threaded rod.

8. A soil erosion thickness measuring instrument according to claim 1, characterized in that: The splicing assembly includes a splicing block, which is fixedly installed on the top of the splicing rod. A sliding groove is provided on one side of the marking rod, and a connecting hole is provided in the sliding groove. A plug rod is slidably installed in the connecting hole. A plug groove is provided on one side of the splicing block, and a reset unit is fixedly installed on the other end of the plug rod.

9. A soil erosion thickness measuring instrument according to claim 8, characterized in that: The reset unit includes a slider, which is fixedly installed at one end of the plug rod and slidably installed in a sliding groove. A slide rod is fixedly installed on one side of the slider, and a baffle is fixedly installed in the sliding groove. The slide rod is slidably installed on the baffle, and a compression spring is sleeved on the surface of the slide rod. A magnetic suction hole is opened at one end of the slide rod.

10. A soil erosion thickness measuring instrument according to claim 1, characterized in that: A platform is fixedly installed at the top of the marking rod, and a label plate is fixedly installed on the upper side of the platform.