Land surveying and mapping calibration equipment

By designing a land surveying and calibration equipment equipped with a walking vehicle and a laser guide, the problem that existing equipment cannot measure the distance between calibration points is solved, and the calibration effect with high applicability and accuracy is achieved.

CN119958513AInactive Publication Date: 2025-05-09YUXI NORMAL UNIV +1

Patent Information

Application Number
CN202510139233.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-08
Publication Date
2025-05-09
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Existing land surveying and mapping calibration equipment cannot achieve distance measurement between the starting two calibration points during calibration, and the operation is complex and the applicability is relatively simple.

Method used

A land surveying and calibration equipment including a walking vehicle and a laser guide is designed. The pulling wire is pulled out through the wheel and the drive motor on the walking vehicle. Combined with the laser guide and the guide assembly, the distance between the calibration starting point and the end point is measured.

Benefits of technology

It is realized that not only the starting point can be calibrated during surveying and mapping, but also the distance between the starting points can be measured, which improves the applicability and accuracy of the equipment.

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Abstract

The invention discloses land surveying and mapping calibration equipment which comprises a walking vehicle and a laser guiding instrument used in cooperation with the walking vehicle, a storage battery is installed at the front end of the upper end of the walking vehicle, a rotating wheel is rotationally connected to the rear portion of the upper end of the walking vehicle, a driving motor is installed on one side of the upper end of the walking vehicle, and a guiding assembly is arranged in the middle of the front end of the upper end of the walking vehicle. An electric push rod is installed in the middle of the front end of the outer wall of the walking vehicle, a line pressing assembly is arranged at the lower end of the electric push rod, a calibration rod is detachably connected to one side of the upper end of the walking vehicle, and a sliding buckle is slidably connected to the outer wall of the calibration rod; a pressing rod is rotationally connected between the left side and the right side of the lower end of the inner wall of each fixing groove in a matched mode, and a notch is formed in the rear end of the outer wall of the walking vehicle. The method not only can calibrate the starting points during surveying and mapping, but also can measure the distance between the starting points in the calibration process, and is high in applicability.
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Description

Technical Field

[0001] The present invention relates to the technical field of surveying and mapping equipment, and in particular to a land surveying and mapping calibration device. Background Art

[0002] Land surveying is the work of measuring and mapping the quantity, distribution and topography of various types of land using surveying and remote sensing technology. It includes topographic surveying, cadastral surveying, land leveling surveying, current land use surveying, and investigation of reserve resources such as barren hills and wastelands.

[0003] According to patent number CN214583281U, a utility model patent for a fixed-point marking device for engineering measurement includes two slide grooves symmetrically opened on both sides of the interior of the positioning frame, the inner sides of the two slide grooves are slidably connected with sliders, a slide plate is fixed between the two sliders, the outer sliding sleeve of the slide plate is provided with a calibration needle slider, the calibration needle is inserted and fixed at the center position of the calibration needle slider, and two side shells are symmetrically arranged on both sides of the exterior of the positioning frame. The utility model, through the fixed mobile switching mechanism, inserts the pointed cone into the soil when the device is used, plays the role of fixing the device, prevents the device from being offset during calibration, and affects the calibration accuracy, and when the device is moved, the moving wheel can be brought into contact with the ground, so that the pointed cone is separated from the ground, which is convenient for moving the device and reduces the labor intensity of workers during movement.

[0004] Although the above technical solution can be used to measure and map the calibration points, the operation is relatively complicated in actual use, and the distance measurement between the two initial calibration points cannot be realized during calibration. It only plays the role of punching calibration and has a relatively single applicability. Summary of the invention

[0005] The purpose of the present invention is to provide a land surveying and mapping calibration device, which can not only calibrate the starting point during surveying and mapping, but also measure the distance between the starting points during the calibration process, and has high applicability.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A land surveying and calibration device, comprising a traveling vehicle and a laser guide used in conjunction with the traveling vehicle, wherein a storage battery is installed at the front end of the upper end of the traveling vehicle, a fixing buckle arranged in a U shape is arranged at the upper end of the traveling vehicle behind the storage battery, a rotating wheel is connected between the left and right sides of the inner wall of the fixing buckle for cooperation and rotation, a pulling wire is wound around the outer wall of the rotating wheel, a driving motor for driving the rotating wheel to rotate is installed at one side of the fixing buckle at the upper end of the traveling vehicle, a power output shaft of the driving motor passes through the fixing buckle and is fixedly connected to the rotating wheel, a guiding assembly is arranged at the middle position of the front end of the upper end of the traveling vehicle, a connecting frame arranged in a U shape is arranged at the middle position of the front end of the outer wall of the traveling vehicle, and an electric push rod is arranged at the middle position of the rear end of the inner wall of the connecting frame;

[0008] A wire pressing assembly is provided at the lower end of the electric push rod, and displacement sensors for measuring the rotation amount of the wire pressing assembly are installed on the left and right sides of the outer wall of the wire pressing assembly. A control panel is provided at the front end of the upper end of the traveling vehicle, and the driving motor, the battery, the electric push rod and the displacement sensor are all electrically connected to the control panel. The free end of the pull wire passes through the guide assembly and the connecting frame, and the free end of the pull wire is provided with a buckle. A calibration rod is detachably connected to one side of the upper end of the traveling vehicle, and the lower end of the calibration rod is conically arranged, and the outer wall of the calibration rod is slidably connected with a sliding buckle for fixing the buckle.

[0009] The front and rear ends of the upper end of the outer wall of the calibration rod are both provided with fixing grooves inwardly, and the left and right sides of the lower end of the inner wall of each fixing groove are rotatably connected with a pressing rod that can rotate up and down and cooperate with it. A limiting block is provided under the outer wall of each pressing rod. When each pressing rod is rotated downward, it can be vertically arranged with the calibration rod through the limiting block. The inner wall of each fixing groove is provided with a permanent magnet that can adsorb and fix the pressing rod. The edge of the upper end of the calibration rod is provided with a rectangular side groove downwardly, and the laser guide is installed on the side groove and is detachably connected to it. The bottom of the laser guide is recessed upward and provided with a positioning groove that cooperates with the side groove to fix it. The rear end of the outer wall of the walking measuring vehicle is provided with a notch that cooperates with the laser guide along its length.

[0010] By adopting the above technical solution, when using it, first move the device to the position where the surveying and mapping needs to be calibrated by the traveling vehicle, then remove the calibration rod from the traveling vehicle, turn the pressing rod in the fixed groove downward to a horizontal position, and the limit block can play a role of limiting support for the pressing rod, and then fix the calibration rod at the calibration starting position through two pressing rods, and then install the laser guide on the upper end of the calibration rod, and start it to work. The guide line emitted by the laser guide can make the traveling vehicle and the calibration rod in a straight line through the slot, and then slide the slider to make it close to the ground and fix it, and then operate the control The control panel is powered by a battery to enable the drive motor to work and drive the rotating wheel to reverse. At this time, the staff fixes the ring buckle on the slide buckle, extends the electric push rod, and allows the wire pressing assembly to press the pull wire on the ground. Then the traveling vehicle moves to the calibration end point. During this process, the drive motor drives the rotating wheel to rotate at a constant speed to pull out the pull wire. When the traveling vehicle moves to the calibration end point, the guide assembly can keep the pull wire in the middle position of the traveling vehicle and press the pull wire to the ground through the wire pressing assembly. At the same time, the displacement sensor can roughly measure the distance between the calibration starting point and the end point through the rotation amount of the wire pressing assembly.

[0011] The present invention is further configured as follows: the traveling vehicle comprises a support plate, a plurality of hub motors installed at the bottom of the support plate and distributed in an array, and a vertical pole arranged at the front end of the upper end of the support plate.

[0012] The present invention is further configured as follows: the guide assembly includes a fixed frame with openings at both ends, fixed rods respectively arranged on the left and right sides of the inner wall of the fixed frame, and guide wheels respectively rotatably connected to the outer wall of each fixed rod at the same axial position height and cooperating with each other.

[0013] By adopting the above technical solution, the pull wire can be kept close to the ground during the movement of the traveling vehicle, thereby reducing the error in measuring the distance between the calibration starting points.

[0014] The present invention is further configured as follows: a positioning wheel is rotatably connected to a middle position below the rear end of the outer wall of the fixing frame.

[0015] By adopting the above technical solution, when the pull wire is pulled out, the positioning wheel can not only provide an upward supporting force for the pull wire, but also prevent the pull wire from being stuck in the two guide wheels, affecting the normal pulling out of the pull wire.

[0016] The present invention is further configured as follows: the wire crimping assembly includes a U-shaped fixing frame with an open lower end, a rotating shaft rotatably connected to the left and right sides of the inner wall of the fixing frame and with both ends extending out of the outer wall thereof, and a wire crimping wheel inside the fixing frame and arranged on the outer wall of the rotating shaft.

[0017] The present invention is further configured as follows: a wire crimping groove is provided in the middle of the outer wall of the wire crimping wheel, which is recessed inwards.

[0018] By adopting the above technical solution, the pull wire can be kept at the lower end of the wire pressing wheel during the process of pressing the pull wire to the ground, thereby preventing the pull wire from slipping out.

[0019] The present invention is further configured as follows: the sliding buckle includes a sliding sleeve, an L-shaped hook arranged on one side of the outer wall of the sliding sleeve, a threaded hole opened on the other side of the outer wall of the sliding sleeve and connected thereto, and a fixing bolt threadedly connected to the threaded hole.

[0020] The present invention is further configured as follows: guide shafts are rotatably connected between the upper and lower ends of the front end of the inner wall of the connecting frame, and a guide groove is recessed inwardly at the middle position of the outer wall of each guide shaft.

[0021] By adopting the above technical solution, a certain pulling force can be exerted when the wire is pulled out, thereby preventing the wire from being too loose and affecting the calibration result.

[0022] In summary, the present invention has the following beneficial effects:

[0023] First, the present invention can not only calibrate the starting point during surveying and mapping, but also measure the distance between the starting points during the calibration process, and has high applicability;

[0024] Secondly, the present invention allows the pull wire to always be attached to the ground through the cooperation of the sliding buckle and the wire pressing wheel, thereby avoiding the bending of the pull wire caused by the pull wire being in the air, thereby affecting the distance between the calibration starting points;

[0025] Thirdly, the cooperation of the laser guide and the positioning groove of the present invention can facilitate the staff to timely adjust the walking direction angle of the walking vehicle during the walking process of the walking vehicle, so as to avoid excessive position deviation angle between the calibration starting points. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is mainly used to show the position and connection relationship of each component;

[0028] Figure 3 It is a structural schematic diagram of the guide assembly of the present invention;

[0029] Figure 4 It is mainly used to display the crimping components;

[0030] Figure 5 Mainly used to display the slide buckle.

[0031] In the figure: 1. Traveling vehicle; 11. Support plate; 12. Hub motor; 13. Vertical pole; 14. Fixing buckle; 15. Rotating wheel; 16. Driving motor; 17. Pull wire; 18. Ring buckle; 19. Battery; 2. Guide assembly; 21. Fixed frame; 22. Fixed rod; 23. Guide wheel; 24. Positioning wheel; 25. Connecting frame; 26. Guide shaft; 27. Guide groove; 28. Electric push rod; 29. ​​Wire pressing assembly; 3. Fixed frame; 31. Rotating shaft; 32. Wire pressing wheel; 33. Wire pressing groove; 34. Displacement sensor; 35. Calibration rod; 36. Fixed groove; 37. Pressing rod; 38. Permanent magnet; 39. Limit block; 4. Sliding buckle; 41. Sliding sleeve; 42. Hook; 43. Threaded hole; 44. Fixing bolt; 45. Side groove; 46. Laser guide; 47. Positioning groove; 48. Notch; 49. Control panel. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0033] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front”, “back”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0034] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0035] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Example, see Figure 1-5A land surveying and calibration device comprises a traveling vehicle 1 and a laser guide 46 used in conjunction with the traveling vehicle 1. The traveling vehicle 1 comprises a support plate 11, four wheel hub motors 12 installed at the bottom of the support plate 11 and arranged in an array, and a vertical pole 13 arranged at the front end of the upper end of the support plate 11. A battery 19 is installed at the front end of the upper end of the traveling vehicle 1. A U-shaped fixing buckle 14 is arranged at the rear of the battery 19 at the upper end of the traveling vehicle 1. A rotating wheel 15 is connected between the left and right sides of the inner wall of the fixing buckle 14 for rotation. A pull wire 17 is wound around the outer wall of the rotating wheel 15. A driving motor 16 for driving the rotating wheel 15 to rotate is installed on one side of the fixing buckle 14, and the power output shaft of the driving motor 16 passes through the fixing buckle 14 and is fixedly connected to the rotating wheel 15. A guide assembly 2 is arranged in the middle position of the upper end of the traveling vehicle 1, and the guide assembly 2 includes a fixing frame 21 with openings at both ends, a fixing rod 22 respectively arranged on the left and right sides of the inner wall of the fixing frame 21, and two guide wheels 23 respectively rotatably connected to the outer wall of each fixing rod 22 at the same axial position height and cooperating with each other, and a positioning wheel 24 is rotatably connected to the middle position below the rear end of the outer wall of the fixing frame 21.

[0037] A U-shaped connecting frame 25 is provided at the middle position of the front end of the outer wall of the traveling vehicle 1, and a guide shaft 26 is connected to the upper and lower ends of the front end of the inner wall of the connecting frame 25 in cooperation with rotation. The middle position of the outer wall of each guide shaft 26 is recessed inwardly and provided with a guide groove 27. An electric push rod 28 is installed at the middle position of the rear end of the inner wall of the connecting frame 25. A wire pressing assembly 29 is provided at the lower end of the electric push rod 28. The wire pressing assembly 29 includes a fixing frame 3 that is U-shaped and has an opening at the lower end, and is connected to the inner wall of the fixing frame 3 in cooperation with rotation. A rotating shaft 31 with both ends extending out of the outer wall on the left and right sides, a wire pressing wheel 32 in the fixed frame 3 and arranged on the outer wall of the rotating shaft 31, a wire pressing groove 33 is provided in the middle position of the outer wall of the wire pressing wheel 32, and a displacement sensor 34 is installed on the left and right sides of the outer wall of the fixed frame 3, which is sleeved on the outer wall of the rotating shaft 31 and used to measure its rotation amount. A control panel 49 is provided on the upper end of the outer wall of the vertical pole 13, and the drive motor 16, the battery 19, the electric push rod 28 and the displacement sensor 34 are all electrically connected to the control panel 49.

[0038] The free end of the pull wire 17 passes through the guide assembly 2, the positioning wheel 24, the two guide grooves 27 and the connecting frame 25. The free end of the pull wire 17 is provided with a ring buckle 18. A calibration rod 35 is detachably connected to one side of the upper end of the traveling vehicle 1. The lower end of the calibration rod 35 is conically arranged. The outer wall of the calibration rod 35 is slidably connected with a slide buckle 4 for fixing the ring buckle 18. The slide buckle 4 includes a sliding sleeve 41, a hook 42 arranged on one side of the outer wall of the sliding sleeve 41 and arranged in an L shape, a threaded hole 43 opened on the other side of the outer wall of the sliding sleeve 41 and connected thereto, and a fixing bolt 44 threadedly connected to the threaded hole 43. A fixing groove 36 is opened inward at both front and rear ends of the upper end of the outer wall of the calibration rod 35.

[0039] A pressing rod 37 that can rotate up and down and cooperate with it is rotatably connected between the left and right sides of the lower end of the inner wall of each fixed groove 36. A limit block 39 is provided at the bottom of the outer wall of each pressing rod 37. When each pressing rod 37 rotates downward, it can be vertically arranged with the calibration rod 35 through the limit block 39. The inner wall of each fixed groove 36 is provided with a permanent magnet 38 that can adsorb and fix the pressing rod 37. The edge of the upper end of the calibration rod 35 is downwardly provided with a rectangular side groove 45. The laser guide 46 is installed on the side groove 45 and is detachably connected to it. The bottom of the laser guide 46 is recessed upward and provided with a positioning groove 47 that cooperates with the side groove 45 to fix it. The rear end of the outer wall of the vertical rod 13 is provided with a notch 48 used in conjunction with the laser guide 46 along its length.

[0040] Usage: When in use, first move the device to the position where the surveying and mapping needs to be calibrated by the wheel hub motor 12 on the traveling vehicle 1, then remove the calibration rod 35 from the support plate 11, turn the pressing rod 37 in the fixing groove 36 downward and keep it away from the corresponding permanent magnet 38, and the limit block 39 can play a role of limiting support for the pressing rod 37 to make the pressing rod 37 at a vertical position angle with the calibration rod 35, and then fix the calibration rod 35 at the calibration starting point position through the two pressing rods 37, and then install the laser guide 46 on the upper end of the calibration rod 35, so that the positioning groove 47 It is fixed with the side groove 45 and then turned on. The guide line emitted by the laser guide 46 can make the walking vehicle 1 and the calibration rod 35 in a straight line through the groove 48 on the vertical pole 13. Then, the fixing bolt 44 in the threaded hole 43 is loosened, and the sliding sleeve 41 is slid downward to the position of the calibration rod 35 close to the ground and fixed by the fixing bolt 44. Then, the control panel 49 is operated to provide electricity from the battery 19 to make the drive motor 16 work, and drive the rotating wheel 15 on the fixing buckle 14 to reverse and pull out the pull wire 17, and then the staff fixes the ring buckle 18 on the hook 42.

[0041] Then, after the wire drawing 17 is located in the wire pressing groove 33 of the wire pressing wheel 32, the electric push rod 28 in the connecting frame 25 is extended and the wire pressing wheel 32 is placed on the ground, and then the traveling vehicle 1 is moved to the calibrated end point. During this process, the driving motor 16 drives the rotating wheel 15 to rotate at a constant speed to pull out the wire drawing 17, and the traveling vehicle 1 also drives the wire pressing wheel 32 to rotate through the rotating shaft 31 in the fixed frame 3. During this process, the two guide wheels 23 on the two fixed rods 22 in the guide assembly 2 can keep the wire drawing 17 in the middle of the traveling vehicle 1 at all times. The positioning wheel 24 on the fixed frame 21 can not only provide an upward supporting force for the downward pull wire 17, but also prevent the pull wire 17 from being stuck between the two guide wheels 23, and cooperate with and press the pull wire 17 to the ground through the wire pressing assembly 29. When the pull wire 17 is in the guide groove 27 of the two guide shafts 26 in the connecting frame 25, it can have a certain tension to prevent the pull wire 17 from being too loose. At the same time, the displacement sensor 34 can roughly measure the distance between the calibration starting point and the end point through the rotation amount of the rotating shaft 31.

[0042] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. After reading this specification, those skilled in the art can make creative modifications to this embodiment as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. A land surveying and mapping calibration device, comprising a traveling vehicle (1) and a laser guide (46) used in conjunction with the traveling vehicle (1), characterized in that: A storage battery (19) is installed at the front end of the upper end of the traveling vehicle (1); a fixing buckle (14) arranged in a U shape is arranged at the upper end of the traveling vehicle (1) behind the storage battery (19); a rotating wheel (15) is connected to the left and right sides of the inner wall of the fixing buckle (14) in a cooperative manner; a pull wire (17) is wound around the outer wall of the rotating wheel (15); a driving motor (16) for driving the rotating wheel (15) to rotate is installed at one side of the fixing buckle (14) at the upper end of the traveling vehicle (1); a power output shaft of the driving motor (16) passes through the fixing buckle (14) and is fixedly connected to the rotating wheel (15); a guide assembly (2) is arranged at the middle position of the front end of the upper end of the traveling vehicle (1); a connecting frame (25) arranged in a U shape is arranged at the middle position of the front end of the outer wall of the traveling vehicle (1); and an electric push rod (28) is arranged at the middle position of the rear end of the inner wall of the connecting frame (25); A wire pressing assembly (29) is provided at the lower end of the electric push rod (28), and displacement sensors (34) for measuring the rotation amount of the wire pressing assembly (29) are installed on both sides of the left and right sides of the outer wall of the wire pressing assembly (29). A control panel (49) is provided at the front end of the upper end of the traveling vehicle (1). The driving motor (16), the storage battery (19), the electric push rod (28) and the displacement sensor (34) are all electrically connected to the control panel (49). The free end of the pull wire (17) passes through the guide assembly (2) and the connecting frame (25), and the free end of the pull wire (17) is provided with a buckle (18). A calibration rod (35) is detachably connected to one side of the upper end of the traveling vehicle (1), and the lower end of the calibration rod (35) is conically arranged. The outer wall of the calibration rod (35) is slidably connected to a sliding buckle (4) for fixing the buckle (18); The front and rear ends of the upper end of the outer wall of the calibration rod (35) are both provided with fixing grooves (36) inwardly, and the left and right sides of the lower end of the inner wall of each fixing groove (36) are rotatably connected with a pressing rod (37) that can rotate up and down and cooperate with it. A limiting block (39) is provided below the outer wall of each pressing rod (37). When each pressing rod (37) rotates downward, it can be vertically arranged with the calibration rod (35) through the limiting block (39). The inner wall of each fixing groove (36) is provided with a fixing member that can be adsorbed and fixed. The permanent magnet (38) of the pressing rod (37) is provided, the edge of the upper end of the calibration rod (35) is provided with a rectangular side groove (45) downwardly, the laser guide (46) is installed on the side groove (45) and is detachably connected thereto, the bottom of the laser guide (46) is recessed upwardly and provided with a positioning groove (47) which cooperates with the side groove (45) to fix it, and the rear end of the outer wall of the traveling vehicle (1) is provided with a notch (48) along its length which cooperates with the laser guide (46).

2. A land surveying and calibration device according to claim 1, characterized in that: The traveling vehicle (1) comprises a support plate (11), a plurality of wheel hub motors (12) installed at the bottom of the support plate (11) and distributed in an array, and a vertical pole (13) arranged at the front end of the upper end of the support plate (11).

3. A land surveying and calibration device according to claim 1, characterized in that: The guide assembly (2) comprises a fixed frame (21) with openings at both the front and rear ends, fixed rods (22) respectively arranged on the left and right sides of the inner wall of the fixed frame (21), and guide wheels (23) respectively rotatably connected to the outer wall of each fixed rod (22) at the same axial position height and cooperating with each other.

4. A land surveying and calibration device according to claim 3, characterized in that: A positioning wheel (24) is rotatably connected to a middle position below the rear end of the outer wall of the fixing frame (21).

5. The land surveying and calibration equipment according to claim 1, characterized in that: The wire pressing assembly (29) comprises a fixing frame (3) which is arranged in a U-shape and has an opening at the lower end, a rotating shaft (31) which is rotatably connected to the left and right sides of the inner wall of the fixing frame (3) and has both ends extending out of the outer wall thereof, and a wire pressing wheel (32) which is inside the fixing frame (3) and arranged on the outer wall of the rotating shaft (31).

6. A land surveying and calibration device according to claim 5, characterized in that: A wire pressing groove (33) is provided in the middle of the outer wall of the wire pressing wheel (32) and is recessed inwards.

7. The land surveying and calibration equipment according to claim 1, characterized in that: The sliding buckle (4) comprises a sliding sleeve (41), a hook (42) arranged on one side of the outer wall of the sliding sleeve (41) and arranged in an L shape, a threaded hole (43) opened on the other side of the outer wall of the sliding sleeve (41) and connected thereto, and a fixing bolt (44) threadedly connected to the threaded hole (43).

8. The land surveying and mapping calibration equipment according to claim 1, characterized in that: A guide shaft (26) is rotatably connected between the upper and lower ends of the inner wall front end of the connecting frame (25), and a guide groove (27) is provided in the middle of the outer wall of each guide shaft (26) inwardly concave.

Citation Information

Patent Citations

  • Fixed point marking device for engineering surveying

    CN214583281U

Cited By

  • Fixed-point marked land measurement device and system

    CN120947597A