Gradient measuring device for land measurement

Abstract

The invention discloses a gradient measuring device for land measurement, and relates to the technical field of land measurement and survey, the gradient measuring device comprises a tripod, a sleeve is fixedly mounted at the center of the tripod, a telescopic rod is sleeved with the sleeve, a top plate is fixedly mounted on the top surface of the telescopic rod, and a rotating column is rotatably connected to the top surface of the top plate; a supporting plate is fixedly mounted on the top surface of the rotating column, a disc is arranged above the supporting plate, a first driving motor is fixedly mounted in the disc, an output shaft of the first driving motor is rotationally connected with a rotating disc, and a clamping groove is formed in the rotating disc; the measuring mechanism is arranged on the rotating disc, the measuring mechanism comprises a shell, and a clamping block is fixedly installed on the bottom face of the shell, and through the arrangement of the measuring mechanism and the moving mechanism, the precision and reliability of measurement are improved, and the flexibility and adaptability of measurement are also enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of land measurement and surveying, and in particular to a slope measuring device for land surveying. Background Art

[0002] Slope measurement is a vital task in the fields of land surveying, topographic surveying, and civil engineering. Traditional slope measurement methods often rely on manual operations, such as using traditional measuring tools such as levels and theodolites to obtain slope values ​​through observation and calculation. However, these methods are not only cumbersome to operate, but also easily affected by human factors, resulting in large errors in the measurement results.

[0003] Existing equipment requires workers to manually level the probe to keep it in a horizontal position. However, this manual leveling method has many limitations. First, manual leveling depends on the experience and skill level of the workers. Operational differences between different personnel may lead to inconsistent measurement results, thereby reducing the accuracy and reliability of the measurement. In addition, the manual leveling process is cumbersome and time-consuming. Especially in complex terrain or large-scale measurement tasks, this inefficient operation method will greatly increase the workload and time cost. Secondly, manual leveling is also easily affected by environmental factors. For example, in the case of strong winds or uneven ground, manual leveling is difficult to ensure that the probe always remains in an accurate horizontal position, which will lead to an increase in measurement errors. In addition, if you want to measure the slope data accurately, you need to measure the slope at different distances and compare multiple sets of data. However, the existing equipment needs to be folded up, moved a certain distance, and then set up again. The equipment also needs to be re-leveled, which greatly reduces the work efficiency of the staff. If multiple measurements and comparisons are not performed, the measured data will be inaccurate, affecting subsequent work steps.

[0004] Therefore, based on the above search and in combination with the prior art, a slope measuring device for land surveying is proposed to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a slope measuring device for land surveying to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A slope measuring device for land surveying comprises: a tripod, a sleeve is fixedly installed at the center of the tripod, a telescopic rod is sleeved inside the sleeve, a top plate is fixedly installed on the top surface of the telescopic rod, a rotating column is rotatably connected to the top surface of the top plate, a support plate is fixedly installed on the top surface of the rotating column, a disc is arranged above the support plate, a driving motor 1 is fixedly installed inside the disc, an output shaft of the driving motor 1 is rotatably connected to the rotating disc, a card slot is provided inside the rotating disc; a measuring mechanism, the measuring mechanism is arranged on the rotating disc, the measuring mechanism comprises: a shell, a card block is fixedly installed on the bottom surface of the shell, the card block is adsorbed on the card slot, and a protective shell is fixedly installed on the side wall of the shell; a moving mechanism, the moving mechanism is arranged on the support plate; a driving assembly, the driving assembly is arranged on the disc and is used to rotate the support plate.

[0008] Preferably, the measuring mechanism also includes: two mounting seats, the two mounting seats are respectively arranged on the top surface and the bottom surface inside the shell, a detection head is movably connected between the two mounting seats, a gyroscope is fixedly installed inside the shell, a processor is fixedly installed on the side wall of the shell, a mounting groove is opened on the side wall of the tripod, and the measuring mechanism also includes an adjustment component.

[0009] Preferably, the adjustment component includes: a second drive motor, the second drive motor is fixedly mounted inside the mounting groove, the output shaft of the second drive motor is rotatably connected to a clamp ring, the side wall of the clamp ring is rotatably connected to a rotating ball, the side wall of the clamp ring is fixedly mounted with a third drive motor, the output shaft of the third drive motor is connected to the side wall of the rotating ball, and the rotating ball fits against the side wall of the detection head.

[0010] Preferably, the moving mechanism includes: two connecting plates, both of which are rotatably connected to the two side walls of the support plate by hinges, the top surface of the support plate and the top surfaces of the two connecting plates are provided with sliding grooves, the bottom surfaces of the sliding grooves are provided with multiple electromagnets, the inside of the sliding grooves is slidably connected with a slider, the top surface of the slider is connected to the bottom surface of the disc, and the moving assembly also includes a limiter.

[0011] Preferably, the limiting member comprises: two limiting blocks, the two limiting blocks are respectively fixedly mounted on the two side walls of the sliding block, limiting grooves are respectively provided on the two side walls of the sliding groove, the two limiting blocks slide in the two limiting grooves, and knobs are rotatably connected to both sides of the bottom surface of the support plate.

[0012] Preferably, the driving assembly includes: gear one, which is rotatably connected to the top surface of the disc, a connecting rod is fixedly installed on the bottom surface of the gear one, a coupling shaft is fixedly installed on the outer surface of the connecting rod and the outer surface of the rotating column, a belt is arranged between the two coupling shafts, and the driving assembly also includes a meshing part.

[0013] Preferably, the engaging member comprises: a toothed belt, the toothed belt is fixedly mounted on the side wall of the rotating disk, the toothed belt does not contact with the gear, and a moving groove is provided on the top surface of the disk.

[0014] Preferably, the engaging part also includes: an electric push rod, which is fixedly mounted on the side wall of the movable groove, and a movable block is fixedly mounted on the output shaft of the electric push rod, and the movable block slides in the electric push rod, and the top surface of the movable block is rotatably connected to gear 2, and gear 2 is respectively engaged with gear 1 and the toothed belt.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In the present invention, by providing a measuring mechanism, high-precision and automation of slope measurement is achieved. The measuring mechanism senses the spatial posture change of the measuring device in real time through a gyroscope, ensures that the detection head is always kept in a horizontal position, and improves the accuracy of measurement. At the same time, through the coordinated work of the second drive motor and the third drive motor, the angle of the detection head can be automatically adjusted according to the deflection angle data fed back by the gyroscope to meet the measurement requirements of different slopes. This automatic adjustment function not only simplifies the measurement process, but also reduces the error caused by human operation, making the measurement result more reliable;

[0017] 2. The mobile mechanism in the present invention provides a stable mobile platform for the measuring device, so that the measuring mechanism can perform accurate slope measurement at different positions. The mobile mechanism realizes the smooth sliding of the measuring mechanism in the slide groove through the cooperation of the electromagnet and the slider, so that the measuring position can be easily adjusted to meet the measurement requirements of different slopes. At the same time, the mobile mechanism also has excellent stability and safety. The setting of the limit groove and the limit block ensures that the slider will not be separated from the slide groove during the movement, thereby avoiding the accidental fall off or damage of the measuring mechanism. This design not only improves the stability of the measurement, but also ensures the safety of the operator. In addition, the coordinated work of the mobile mechanism and the drive assembly realizes the longitudinal movement measurement of the measuring mechanism. By turning on the electric push rod, the gear two is meshed with the gear one and the toothed belt, and then starting the drive motor to drive the rotating disk to rotate, the longitudinal movement of the measuring mechanism can be realized. This design not only improves the flexibility of the measurement, but also further expands the measurement range, so that the present invention can be applied to more complex measurement scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the expanded structure of the connecting plate of the present invention;

[0020] Figure 3 It is a schematic diagram of the explosion structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the split structure of the protective shell of the present invention;

[0022] Figure 5 It is a schematic diagram of the internal structure of the measuring mechanism of the present invention;

[0023] Figure 6 This is a schematic diagram of the split structure of the regulating component of the present invention;

[0024] Figure 7 It is a schematic diagram of the overall structure of the mobile mechanism of the present invention;

[0025] Figure 8 It is a bottom view of the structure of the moving mechanism of the present invention.

[0026] In the figure: 1. tripod; 2. sleeve; 3. telescopic rod; 4. top plate; 5. rotating column; 6. support plate; 7. disc; 8. driving motor 1; 9. rotating disc; 10. slot; 11. shell; 12. protective shell; 13. block; 14. mounting seat; 15. detection head; 16. gyroscope; 17. processor; 18. mounting slot; 19. driving motor 2; 20. clamping ring; 21. rotating ball; 22. driving motor 3; 23. hinge; 24. connecting plate; 25. slide slot; 26. electromagnet; 27. slider; 28. knob; 29. ​​gear 1; 30. connecting rod; 31. coupling; 32. belt; 33. toothed belt; 34. moving slot; 35. electric push rod; 36. moving block; 37. gear 2; 38. limit slot; 39. limit block. DETAILED DESCRIPTION

[0027] 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.

[0028] In a typical implementation of this application, please refer to Figures 1 to 8 As shown, a slope measuring device for land surveying comprises:

[0029] A tripod 1, a sleeve 2 is fixedly installed at the center of the tripod 1, a telescopic rod 3 is sleeved inside the sleeve 2, a top plate 4 is fixedly installed on the top surface of the telescopic rod 3, a rotating column 5 is rotatably connected to the top surface of the top plate 4, a supporting plate 6 is fixedly installed on the top surface of the rotating column 5, a disc 7 is arranged above the supporting plate 6, a driving motor 8 is fixedly installed inside the disc 7, an output shaft of the driving motor 8 is rotatably connected to a rotating disc 9, and a card slot 10 is provided inside the rotating disc 9;

[0030] The measuring mechanism is arranged on the rotating disk 9 and includes:

[0031] A housing 11, a card block 13 is fixedly mounted on the bottom surface of the housing 11, the card block 13 is adsorbed on the card slot 10, and a protective shell 12 is fixedly mounted on the side wall of the housing 11;

[0032] A moving mechanism, the moving mechanism is arranged on the supporting plate 6;

[0033] The driving assembly is arranged on the disc 7 and is used to rotate the supporting plate 6 .

[0034] The measuring mechanism also includes: two mounting seats 14, the two mounting seats 14 are respectively arranged on the top surface and the bottom surface inside the shell 11, a detection head 15 is movably connected between the two mounting seats 14, a gyroscope 16 is fixedly installed inside the shell 11, a processor 17 is fixedly installed on the side wall of the shell 11, a mounting groove 18 is opened on the side wall of the tripod 1, and the measuring mechanism also includes an adjustment component.

[0035] As a preferred implementation in this embodiment, please refer to Figures 4 to 6 As shown, the adjustment component includes: a drive motor 2 19, the drive motor 2 19 is fixedly installed inside the mounting groove 18, the output shaft of the drive motor 2 19 is rotatably connected to a clamp ring 20, the side wall of the clamp ring 20 is rotatably connected to a rotating ball 21, the side wall of the clamp ring 20 is fixedly installed with a drive motor 3 22, the output shaft of the drive motor 3 22 is connected to the side wall of the rotating ball 21, and the rotating ball 21 fits against the side wall of the detection head 15.

[0036] The above features can be used to measure the slope, and the angle of the detection head 15 can be adjusted. Specifically, when it is necessary to measure the slope, the tripod 1 is first fixed on the ground, and then the shell 11 is fixed on the rotating disk 9 by adsorbing the block 13 and the slot 10, and the telescopic rod 3 is adjusted to a suitable position. At this time, the instrument is started. At this time, if the bracket is not level with the bottom surface, the gyroscope 16 will deflect, and the deflection angle of the gyroscope 16 will be transmitted to the processor 17. The processor 17 transmits the processed data to the drive motor 2 19 and the drive motor 3 22. If the gyroscope 16 deviates laterally, the drive motor 3 22 will be started at this time, and the gyroscope 16 will rotate according to the rotation of the gyroscope 16. When the angle comes, the rotating ball 21 rotates, causing the detection head 15 on one side of the rotating ball 21 to deviate. If the gyroscope 16 deviates vertically, the driving motor 2 19 will be started, and the clamp ring 20 will be rotated to the horizontal direction, and then the driving motor 3 22 will be turned on to make the detection head 15 deviate vertically. This step can keep the detection head 15 in a horizontal position. At this time, the detection head 15 will first observe the top of the slope, and then move the detection head 15 to the lowest point of the slope for observation through the driving motor 2 19, the clamp ring 20, the rotating ball 21 and the driving motor 3 22. After that, the observed data will be processed and calculated by the processor 17, and then transmitted to the staff to measure the slope;

[0037] It is worth mentioning that the processor 17 will obtain the original angular velocity data from the gyroscope 16 sensor. These data are usually in degrees per second dps or radians per second rad / s, indicating the rotational angular velocity of the gyroscope 16 on each axis such as the x, y, and z axes. In order to obtain the deflection angle, the processor 17 needs to integrate the angular velocity data. In theory, the deflection angle at any time can be obtained by continuous integration. However, in practical applications, since the processor 17 can only process discrete data points, numerical integration methods such as trapezoidal integration or Simpson integration are usually used. When the time interval is small, it can be simplified to multiply the angular velocity by the time interval to approximate the angle change. That is, θ≈ω×Δt, where θ represents the angle change, ω represents the angular velocity, and Δt represents the time interval. This is an existing mature technical means, so it is not described in detail in the present invention.

[0038] As a preferred implementation in this embodiment, please refer to Figure 2 , Figure 3 , Figure 7 and Figure 8As shown, the moving mechanism includes: two connecting plates 24, the two connecting plates 24 are rotatably connected to the two side walls of the support plate 6 through hinges 23, the top surface of the support plate 6 and the top surfaces of the two connecting plates 24 are provided with a slide groove 25, the bottom surface of the slide groove 25 is provided with a plurality of electromagnets 26, the inside of the slide groove 25 is slidably connected with a slider 27, the top surface of the slider 27 is connected to the bottom surface of the disc 7, the moving assembly also includes a limit member, the limit member includes: two limit blocks 39, the two limit blocks 39 are respectively fixedly mounted on the two side walls of the slider 27, the two side walls of the slide groove 25 are provided with a limit groove 38, the two limit blocks 39 slide in the two limit grooves 38 respectively, and the two sides of the bottom surface of the support plate 6 are rotatably connected with knobs 28.

[0039] Through the above features, the slope can be measured at different positions to maintain the accuracy of measurement. Specifically, after the detection head 15 measures the initial data, the staff can unfold the two connecting plates 24 through the hinge 23, and then rotate the knob 28 on the bottom of the support plate 6 to the bottom of the connecting plate 24, so that the connecting plate 24 and the support plate 6 are on the same horizontal line. At this time, turning on the electromagnet 26 on one side can move the slider 27. The slider 27 is made of iron material. When the slider 27 moves, the disc 7 connected to the top surface of the slider 27 and the rotating disc 9 connected to the disc 7 move evenly, thereby driving the shell 11 to move. When the shell 11 moves, the internal detection head 15 and other parts will move synchronously, so that the detection head 15 can measure the slope at a fixed position, and then compare multiple data, thereby improving the accuracy of slope measurement, and the limit groove 38 and the limit block 39 prevent the slider 27 from disengaging from the slide groove 25 when moving, and this movement moves horizontally;

[0040] It is worth mentioning that the electromagnet 26 is composed of a coil wound by a wire and a magnetic field generated by the current in the coil. When a current is passed through the coil of the electromagnet 26, the current forms a magnetic field in the wire. According to Ampere's loop law, the magnetic field formed by the current will propagate along the direction of the closed loop. The generated magnetic field has a strong attraction to the slider 27. By changing the size or direction of the current, the attraction and repulsion of the electromagnet 26 on the slider 27 can be controlled, thereby realizing the movement of the iron block. This is an existing mature technical means, so it is not described in detail in the present invention.

[0041] As a preferred implementation in this embodiment, please refer to Figure 2 and Figure 3As shown, the driving assembly includes: a gear 29, which is rotatably connected to the top surface of the disc 7, a connecting rod 30 is fixedly installed on the bottom surface of the gear 29, and a coupling 31 is fixedly installed on the outer surface of the connecting rod 30 and the outer surface of the rotating column 5, and a belt 32 is arranged between the two couplings 31. The driving assembly also includes a meshing member, which includes: a toothed belt 33, which is fixedly installed on the side wall of the rotating disc 9, and the toothed belt 33 does not contact the gear 29. A moving groove 34 is opened on the top surface of the disc 7. The meshing member also includes: an electric push rod 35, which is fixedly installed on the side wall of the moving groove 34, and a moving block 36 is fixedly installed on the output shaft of the electric push rod 35. The moving block 36 slides in the electric push rod 35, and the top surface of the moving block 36 is rotatably connected to a gear 2 37, and the gear 2 37 is respectively meshed with the gear 29 and the toothed belt 33.

[0042] Through the above features, the detection head 15 can be moved longitudinally for measurement. Specifically, when longitudinal measurement is required, the staff first turns on the electric push rod 35, so that the moving block 36 connected to the output shaft of the electric push rod 35 drives the gear 2 37 to mesh with the gear 1 29 and the toothed belt 33. At this time, the driving motor 1 8 is turned on to rotate the rotating disk 9. While the rotating disk 9 rotates, the gear 2 37 will drive the gear 1 29 to rotate, and the gear 1 29 will drive the connecting rod 30 and the coupling 31 on the connecting rod 30 to rotate synchronously. When the coupling 31 on the connecting rod 30 rotates, the coupling 31 on the rotating column 5 will rotate synchronously through the belt 32, so that the rotating column 5 rotates. When the rotating column 5 rotates, the support plate 6 will also rotate synchronously, and the two connecting plates 24 connected to the support plate 6 will be active. When the support plate 6 rotates to the appropriate position, the electric push rod 35 will shrink. At this time, the support plate 6 no longer rotates, and the driving motor 1 8 will drive the rotating disk 9 to rotate to the appropriate measurement position, so that the detection head 15 can measure the slope longitudinally;

[0043] It is worth mentioning that the belt 32 is made of a stretchable material, and the longitudinal movement of the detection head 15 is consistent with the operation of the upper lateral movement.

[0044] Working principle:

[0045] When in use, the tripod 1 is first firmly fixed on the ground as the basic support of the entire measuring device. Then, by adjusting the telescopic length of the telescopic rod 3 in the sleeve 2, the top plate 4 and the measuring mechanism above it can be adjusted to a suitable height to adapt to different measuring environments and needs. When it is necessary to measure the slope, the housing 11 is adsorbed with the card slot 10 on the rotating disk 9 through the card block 13 on its bottom surface to achieve a stable connection. At this time, the drive motor 18 is started, driving the rotating disk 9 to rotate, and then driving the entire measuring mechanism to rotate. When the gyroscope 16 senses that the measuring mechanism is deflected, the processor 17 will adjust the angle of the detection head 15 by controlling the operation of the drive motor 2 19 and the drive motor 3 22 according to the data of the deflection angle. If the gyroscope 16 is laterally offset, the drive motor 3 22 will start, and the rotating ball 21 will be rotated according to the angle of rotation of the gyroscope 16, so that the detection head 15 on one side of the rotating ball 21 is offset. If the gyroscope 16 is vertically offset, the drive motor 2 19 will be started, the clamp ring 20 will be rotated to the horizontal direction, and then the drive motor 3 22 will be turned on to make the detection head 15 vertically offset. This step ensures that the detection head 15 is always kept in a horizontal position, thereby improving the accuracy of the measurement. During the measurement process, the moving mechanism allows the measuring mechanism to move at different positions to maintain the accuracy of the measurement. The connecting plate 24 is unfolded by the hinge 23 and fixed on the same horizontal line by the knob 28, and then the electromagnet 26 is turned on to attract the slider 27 to slide in the slide 25. The movement of the slider 27 drives the movement of the disc 7, the rotating disk 9 and the entire measuring mechanism connected thereto. At the same time, the limit groove 38 and the limit block 39 ensure that the slider 27 will not be separated from the slide 25 during the movement. In addition, the drive assembly allows the measuring mechanism to perform longitudinal movement measurement. The electric push rod 35 is turned on to make the gear 2 37 mesh with the gear 1 29 and the toothed belt 33, and then the drive motor 1 8 is started to drive the rotating disk 9 to rotate. The rotation of the rotating disk 9 drives the synchronous rotation of the rotating column 5 and the support plate 6 through the transmission of the gear and the belt 32, thereby realizing the longitudinal movement of the measuring mechanism. When the support plate 6 rotates to the appropriate position, the electric push rod 35 contracts to fix the support plate 6 at this position. At this time, the driving motor 8 continues to drive the rotating disk 9 to rotate to the appropriate measuring position, so that the detection head 15 can measure the slope longitudinally. During the entire measurement process, the detection head 15 first observes the top of the slope, and then moves to the bottom of the slope for observation through the adjustment of the moving mechanism or the driving component. The observed data is processed and calculated by the processor 17, and then transmitted to the staff to enable them to accurately measure the slope.

[0046] 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 slope measuring device for land surveying, characterized in that: include: A tripod (1), wherein a sleeve (2) is fixedly installed at the center of the tripod (1), a telescopic rod (3) is sleeved inside the sleeve (2), a top plate (4) is fixedly installed on the top surface of the telescopic rod (3), a rotating column (5) is rotatably connected to the top surface of the top plate (4), a supporting plate (6) is fixedly installed on the top surface of the rotating column (5), a disc (7) is arranged above the supporting plate (6), a driving motor (8) is fixedly installed inside the disc (7), an output shaft of the driving motor (8) is rotatably connected to a rotating disc (9), and a card slot (10) is provided inside the rotating disc (9); A measuring mechanism, wherein the measuring mechanism is arranged on a rotating disk (9), and the measuring mechanism comprises: A housing (11), a card block (13) being fixedly mounted on the bottom surface of the housing (11), the card block (13) being adsorbed on the card slot (10), and a protective shell (12) being fixedly mounted on the side wall of the housing (11); A moving mechanism, wherein the moving mechanism is arranged on a supporting plate (6); A driving assembly is arranged on the disc (7) and is used to rotate the supporting plate (6).

2. A slope measuring device for land surveying according to claim 1, characterized in that: The measurement organization also includes: Two mounting seats (14), the two mounting seats (14) are respectively arranged on the top surface and the bottom surface inside the shell (11), a detection head (15) is movably connected between the two mounting seats (14), a gyroscope (16) is fixedly installed inside the shell (11), a processor (17) is fixedly installed on the side wall of the shell (11), a mounting groove (18) is opened on the side wall of the tripod (1), and the measuring mechanism also includes an adjustment component.

3. A slope measuring device for land surveying according to claim 2, characterized in that: The adjustment components include: A second drive motor (19), wherein the second drive motor (19) is fixedly mounted inside the mounting groove (18), the output shaft of the second drive motor (19) is rotatably connected to a clamp ring (20), the side wall of the clamp ring (20) is rotatably connected to a rotating ball (21), the side wall of the clamp ring (20) is fixedly mounted with a third drive motor (22), the output shaft of the third drive motor (22) is connected to the side wall of the rotating ball (21), and the rotating ball (21) is in contact with the side wall of the detection head (15).

4. The slope measuring device for land surveying according to claim 1, characterized in that: The mobile mechanism includes: Two connecting plates (24), both of which are rotatably connected to the two side walls of the support plate (6) through hinges (23), the top surface of the support plate (6) and the top surfaces of the two connecting plates (24) are provided with a slide groove (25), the bottom surface of the slide groove (25) is provided with a plurality of electromagnets (26), the inside of the slide groove (25) is slidably connected with a slider (27), the top surface of the slider (27) is connected to the bottom surface of the disc (7), and the moving assembly also includes a limiter.

5. A slope measuring device for land surveying according to claim 1 or 4, characterized in that: the limiter include: Two limit blocks (39), the two limit blocks (39) are respectively fixedly mounted on the two side walls of the slider (27), the two side walls of the slide groove (25) are provided with limit grooves (38), the two limit blocks (39) slide in the two limit grooves (38), and the two sides of the bottom surface of the support plate (6) are rotatably connected with knobs (28).

6. The slope measuring device for land surveying according to claim 1, characterized in that: The drive components include: Gear 1 (29), the gear 1 (29) is rotatably connected to the top surface of the disc (7), a connecting rod (30) is fixedly installed on the bottom surface of the gear 1 (29), a coupling shaft (31) is fixedly installed on the outer surface of the connecting rod (30) and the outer surface of the rotating column (5), a belt (32) is arranged between the two coupling shafts (31), and the driving assembly also includes a meshing member.

7. A slope measuring device for land surveying according to claim 6, characterized in that: The meshing parts include: A toothed belt (33) is fixedly mounted on the side wall of the rotating disk (9), the toothed belt (33) does not contact the gear one (29), and a moving groove (34) is provided on the top surface of the disk (7).

8. The slope measuring device for land surveying according to claim 7, characterized in that: The engaging parts also include: An electric push rod (35) is fixedly mounted on the side wall of the moving groove (34); a moving block (36) is fixedly mounted on the output shaft of the electric push rod (35); the moving block (36) slides in the electric push rod (35); a top surface of the moving block (36) is rotatably connected to a gear 2 (37); the gear 2 (37) is respectively meshed with a gear 1 (29) and a toothed belt (33).

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