Multifunctional measuring instrument for engineering surveying and mapping

Abstract

The invention relates to the technical field of engineering surveying and mapping, in particular to a multifunctional measuring instrument for engineering surveying and mapping, which comprises a camera and a base, the camera is rotatably connected to the base, three first frame legs are hinged to the bottom of the base, and second frame legs are slidably connected to the first frame legs. According to the multifunctional measuring instrument for engineering surveying and mapping, each time when the multifunctional measuring instrument for engineering surveying and mapping is placed on the ground, the adjusting assembly can control the second frame leg to slide on the first frame leg so as to adjust the levelness of the base, a stopping assembly is further arranged in the mounting base, and after the adjusting assembly completes adjustment, the stopping assembly enables the adjusting assembly to stop running, so that the levelness of the base is adjusted. And it is ensured that the adjusting assembly stops running after the base is adjusted to be stable, so that the step of coarse adjustment of the multifunctional measuring instrument for engineering surveying and mapping by workers is reduced, and the working efficiency of the workers is improved.

Description

Technical Field

[0001] The invention relates to the technical field of engineering surveying and mapping, in particular to a multifunctional measuring instrument for engineering surveying and mapping. Background Art

[0002] Multifunctional measuring instruments are widely used in construction, transportation, water conservancy, mining and other fields. They can measure physical quantities such as angles, distances, heights, etc., improve work efficiency, reduce measurement errors, and ensure project quality. For example, in the construction field, multifunctional measuring instruments can be used to accurately measure the position and height of buildings to ensure the stability and safety of buildings.

[0003] Engineering surveying instruments need to perform multiple measurements at different angles when measuring, because a measurement may be interfered by various factors, such as instrument errors, the operator's technical level, environmental influences, etc. By measuring multiple times at different positions, these interference factors can be eliminated, thereby improving the accuracy and reliability of the measurement results. Under the same conditions, if the results of multiple measurements are close, it means that the measurement process is stable and the results are highly consistent. On the contrary, if the results are very different, performing multiple measurements means that the multifunctional measuring instrument for engineering surveying needs to be moved to different positions. After each move, the multifunctional measuring instrument must be adjusted for levelness, which increases the workload of the staff and reduces work efficiency.

[0004] In view of the above problems, the prior art provides some solutions. For example, patent application number: CN202110089394.2 provides a surveying instrument positioning device for surveying and mapping engineering and a positioning method thereof, comprising a vertical pole, a support fixedly connected to the top of the vertical pole, and a support leg evenly rotatably connected to the outer side of the support. By setting a longitudinal horizontal box and a transverse horizontal box, after the device is powered on, the longitudinal horizontal box is rotated by the angle motor on one side of the first fixed plate, so that the bubble inside the level is adjusted to the left and right horizontal lines of the cross mark center, and then the transverse horizontal box is rotated. When the transverse horizontal box rotates, the bubble inside the level at its top approaches the cross mark center on one side of the cross mark center until the bubble coincides with the cross mark center, indicating that the transverse horizontal box is in a horizontal position. Since the transverse horizontal box is in a horizontal position after adjustment, when the surveying instrument body is assembled, it only needs to be fine-tuned through the adjustment mechanism inside the surveying instrument body, thereby saving a lot of coarse adjustment time and making the measuring instrument more convenient to use. However, this solution requires an additional motor to be added to the surveying instrument for surveying and mapping engineering, which not only increases the failure rate of the device, but also increases the cost. Summary of the invention

[0005] The purpose of the present invention is to provide a multifunctional measuring instrument for engineering surveying and mapping, so as to solve the problem that the multifunctional measuring instrument for engineering surveying and mapping needs to be moved to different positions for multiple measurements, and the horizontality of the multifunctional measuring instrument needs to be adjusted after each movement, which increases the workload of the staff and reduces the work efficiency.

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

[0007] A multifunctional measuring instrument for engineering surveying and mapping comprises a camera and a base, wherein the camera is rotatably connected to the base, three legs 1 are hinged at the bottom of the base, and leg 2 is slidably connected to leg 1, a mounting seat is fixedly installed at the bottom of the base, three guide rails are fixedly installed inside the mounting seat, and three adjustment components with sliders are also arranged inside the mounting seat, and the three sliders are all slidably connected to the three guide rails, a buffer pad is arranged on one side of the guide rail, and the slider contacts the buffer pad, and when the base is tilted, the slider slides on the guide rail in a direction away from the buffer pad, and at this time the adjustment component controls leg 2 to slide on leg 1, and a stop component is also arranged inside the mounting seat, and when the base is horizontal, the stop component stops the adjustment component from running.

[0008] It is easy to understand that when the multifunctional measuring instrument for engineering surveying and mapping needs to measure a certain building multiple times, it is necessary to move the multifunctional measuring instrument for engineering surveying and mapping to different positions. However, each time it is moved to a position, the level of the multifunctional measuring instrument must be adjusted, which increases the workload of the staff and reduces the work efficiency. The design sets an adjustment component so that whenever the multifunctional measuring instrument for engineering surveying and mapping is placed on the ground, the adjustment component will adjust the level of the base by controlling the second leg to slide on the first leg, and a stop component is also set inside the mounting base. When the adjustment component completes the adjustment, the stop component stops the adjustment component from running, ensuring that the adjustment component stops running after the base is adjusted smoothly. Therefore, the setting reduces the steps for the staff to make rough adjustments to the multifunctional measuring instrument for engineering surveying and mapping, thereby improving the work efficiency of the staff.

[0009] Preferably, the adjustment component includes a connector, and the number of the connectors is 3, and the three connectors are hinged at the bottom of the base. The interior of the guide rail is a hollow structure, and a vent hole is provided on the guide rail. The vent hole connects the interior of the guide rail with the outside of the guide rail. The connector is a hollow structure, and one end of the connector is fixedly connected to the guide rail, and the interior of the connector is connected to the interior of the guide rail. The other end of the connector is also fixedly connected to a gas cylinder, and the interior of the connector is connected to the interior of the gas cylinder. A connecting rod is fixedly connected to the second leg, and one end of the connecting rod is fixedly connected to a piston. The piston is slidably connected to the inside of the gas cylinder, and the outside of the piston fits against the inner wall of the gas cylinder.

[0010] It is easy to understand that when the base is tilted, the slider located at the lower position will slide on the guide rail due to the action of gravity and block the vent hole, while the slider located at the higher position cannot slide toward the vent hole. At this time, the piston will squeeze the gas inside the gas cylinder, causing the vent hole to continue to deflate, thereby causing the leg on the side of the slider located at the higher position to continuously shrink until the base returns to a horizontal position. This design can automatically adjust the levelness of the base without the need for an additional power device and level detection device to be set on the base. The structure is simple and compact, and the manufacturing cost is also reduced.

[0011] Preferably, the stop assembly includes a gasket, which is fixedly connected to the bottom of the slider. A spring 1 is also provided inside the mounting seat. The number of the springs 1 is 3. One end of the spring 1 is fixedly connected to the gasket, and the other end of the spring 1 is fixedly connected to the inner wall of the mounting seat. The spring 1 pushes the slider toward the outside of the mounting seat. When the base tilts, the slider compresses the spring 1 in the direction away from the buffer pad and slides on the guide rail.

[0012] It is easy to understand that when the base tilts, the slider located at the lower position will slide on the guide rail due to the action of gravity and block the bleed hole, while the slider located at the higher position cannot slide toward the bleed hole, which causes the bleed hole to continue to deflate. At this time, after the base is balanced under the adjustment of the adjustment component, the guide rail where the slider located at the higher position is located has only recovered to the horizontal level, and the slider still cannot move toward the bleed hole. At this time, the bleed hole is still continuously deflated, which will cause the base to tilt again. The design sets a stop component inside the mounting base. When the base is in a horizontal state, the spring pushes the slider to block the bleed hole. When the base tilts, the slider located at the higher position squeezes the spring away from the bleed hole. When the base is adjusted to balance, the spring will push the slider to block the bleed hole, causing all the bleed holes to stop deflation, and the adjustment component stops working at this time. Therefore, the design ensures that the adjustment component can stop in time after completing the adjustment to avoid the adjustment component continuing to work and causing the base to tilt again, thereby improving the adjustment accuracy.

[0013] Preferably, three rectangular holes are provided on the mounting seat, and the three rectangular holes are respectively located at the ends of the three guide rails. A lifting block is hinged on the three rectangular holes. When the three legs are folded, the legs are in contact with one end of the lifting block, and the other end of the lifting block is in contact with the slider. At this time, the distance from the end of the lifting block in contact with the slider to the inner wall of the mounting seat is equal to the width of the vent hole.

[0014] It is easy to understand that the design is provided with a lifting block on the mounting seat. When the three legs are folded up, the leg one will squeeze the lifting block. At this time, the other end of the lifting block will squeeze the slider to make the slider away from the vent hole to keep the vent hole unobstructed. At this time, the staff will stretch the leg two and then unfold the three legs one. At this time, the leg one is away from the lifting block, and the leg one no longer exerts pressure on the leg one. This design avoids the situation that when the staff stretches the leg two, if the slider blocks the vent hole, the leg two will be unable to be stretched. This design can ensure the unobstructed vent hole when the three legs are folded, and ensure that the leg one can be smoothly stretched when the adjustment component has not yet worked, which is convenient for the staff's operation and improves work efficiency.

[0015] Preferably, the gas cylinder includes a fixed end and a sliding end, the fixed end is fixedly connected to the connector, the sliding end is slidably connected to the fixed end, the piston is slidably connected to the inside of the sliding end, a vent hole is opened at the bottom of the connector, the vent hole connects the inside of the connector with the inside of the fixed end, baffle 1 is hinged on both sides of the vent hole, a torsion spring is provided at the hinge between baffle 1 and the connector, a long plate is fixedly connected to the inside of the sliding end, baffle 2 is fixedly connected to one end of the long plate, spring 2 is provided between the fixed end and the sliding end, baffle 1 is fitted with baffle 2, at this time the fixed end and the sliding end are not connected, when the sliding end squeezes the spring, baffle 2 moves away from baffle 1, at this time the fixed end and the sliding end are connected.

[0016] It is easy to understand that when the staff fully unfolds the three legs on the base, the staff needs to place the multifunctional measuring instrument for engineering surveying and mapping with the legs facing down on the ground. In this process, the three legs may collide, causing the gas inside the gas cylinder to be compressed, and then causing the leg two to shrink. The design splits the gas cylinder into a fixed end and a sliding end. Only when the multifunctional measuring instrument for engineering surveying and mapping is completely placed on the ground, the three legs will bear the gravity of the multifunctional measuring instrument for engineering surveying and mapping. The sliding end will compress the internal spring two and release it to move. At this time, the baffle two inside the sliding end moves with the sliding end. When the baffle two is completely away from the baffle one inside the fixed end, the leg two can slide. Therefore, the design avoids the shrinkage of the leg two due to collision when the multifunctional measuring instrument for engineering surveying and mapping is put down again, which increases the inclination angle of the base and increases the adjustment time of the adjustment component.

[0017] Preferably, a threaded hole is provided on the first leg, and a knob is also provided on the first leg. The knob passes through the threaded hole and is threadedly connected to the first leg, and one end of the knob passes through the first leg and contacts the second leg.

[0018] It is easy to understand that after the adjustment component is adjusted, when the multifunctional measuring instrument for engineering surveying and mapping starts to measure, since the frame legs one and two are supported by the gas inside the compressed gas cylinder, and the compressed gas has a certain elasticity, this will cause the frame legs one and two to slide when the multifunctional measuring instrument for engineering surveying and mapping is measuring, causing the multifunctional measuring instrument for engineering surveying and mapping to shake during measurement, thereby affecting the measurement accuracy. In addition, the vent hole is sealed by the slider, and the gas inside the gas cylinder may leak during measurement, which also causes sliding between the frame legs one and two. The design also provides a knob on the frame leg one. After the adjustment component is adjusted, the staff can turn the knob to make one end of the knob pass through the frame leg one and contact the frame leg two, and reinforce the frame leg two. Therefore, the design ensures the stability of the multifunctional measuring instrument for engineering surveying and mapping during measurement.

[0019] Preferably, the vent hole is located at the front side of the buffer pad and fits with the buffer pad, and when the slider contacts the buffer pad, the slider completely covers the vent hole.

[0020] It is easy to understand that the design sets the vent hole on the front side of the buffer pad and fits with the buffer pad. When the slider contacts the buffer pad, the slider will completely block the vent hole. When the base is tilted, the slider only needs to leave the buffer pad to connect the inside of the guide rail with the outside of the guide rail through the vent hole. This design avoids the situation where the base is not tilted at a large angle and the slider only moves a short distance. If the vent hole is still a certain distance away from the buffer pad, the slider may block the vent hole after the slider compression spring is displaced, resulting in the inability to adjust the adjustment component. Therefore, this design improves the reliability of the adjustment component. In addition, this design ensures that as long as the base is tilted, the vent hole will open despite the small tilt angle, and the adjustment component will start to adjust. Therefore, this design improves the adjustment accuracy of the adjustment component.

[0021] Preferably, three sliding covers are provided on the mounting seat, the three sliding covers are all slidably connected to the mounting seat, and the three sliding covers are respectively located at outlets of three air vents.

[0022] It is easy to understand that when the multifunctional measuring instrument for engineering surveying and mapping works in an environment with severe dust, dust and impurities will enter the inside of the mounting base through the vent holes on the mounting base. At this time, the dust and impurities will contaminate the slider and guide rail on the inner wall of the mounting base, thereby increasing the friction coefficient between the slider and the guide rail, and causing the slider and the guide rail to wear more severely. The design arranges a sliding cover on the outside of the vent hole. After the adjustment component in the multifunctional measuring instrument for engineering surveying and mapping is adjusted, the staff can slide the sliding cover to seal the vent hole. This design prevents dust and impurities from entering the inside of the mounting base when the multifunctional measuring instrument for engineering surveying and mapping is working, thereby increasing the service life of the slider and the guide rail.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The design sets an adjustment component and a stop component inside the mounting base, so that whenever the multifunctional measuring instrument for engineering surveying and mapping is placed on the ground, the adjustment component will adjust the horizontality of the base by controlling the second leg to slide on the first leg, and a stop component is also set inside the mounting base. When the adjustment component completes the adjustment, the stop component stops the adjustment component to ensure that the adjustment component stops after the base is adjusted smoothly. Therefore, this setting reduces the steps for the staff to roughly adjust the multifunctional measuring instrument for engineering surveying and mapping, and improves the work efficiency of the staff.

[0025] 2. This design sets a slider inside the mounting base. When the base tilts, the slider at the lower position will slide on the guide rail due to gravity and block the vent hole, while the slider at the higher position cannot slide toward the vent hole. At this time, the piston will squeeze the gas inside the gas cylinder, causing the vent hole to continue to deflate, thereby causing the leg on the side of the slider at the higher position to continuously shrink until the base returns to a horizontal position. This design can automatically adjust the levelness of the base without setting an additional power device and level detection device on the base. The structure is simple and compact, and the manufacturing cost is reduced.

[0026] 3. The design sets a stop group inside the mounting base. When the base is in a horizontal state, the spring pushes the slider to block the vent hole. When the base is tilted, the slider at a high position squeezes the spring away from the vent hole. When the base is adjusted to balance, the spring pushes the slider to block the vent hole, so that all the vent holes stop deflation, and the adjustment component stops working. Therefore, the design ensures that the adjustment component can stop in time after the adjustment is completed, avoiding the adjustment component from continuing to work and causing the base to tilt again, thereby improving the adjustment accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the multifunctional measuring instrument for engineering surveying and mapping of the present invention;

[0028] Figure 2 for Figure 1 Sectional view at AA;

[0029] Figure 3 for Figure 2 Enlarged view of point B in the middle;

[0030] Figure 4 It is a structural schematic diagram of the tripod 1, the tripod 2 and the mounting base of the present invention;

[0031] Figure 5 for Figure 4 Sectional view at CC;

[0032] Figure 6 for Figure 5 Enlarged view of point D in the middle;

[0033] Figure 7 It is a schematic diagram of the structure of the tripod 1 and the tripod 2 of the present invention;

[0034] Figure 8 for Figure 7 Sectional view at EE;

[0035] Fig. 9 for Figure 8 Enlarged view of point F in the middle.

[0036] In the figure: 1. camera; 2. base; 3. leg 1; 4. leg 2; 5. mounting base; 6. guide rail; 7. slider; 8. buffer pad; 9. connector; 10. vent hole; 11. gas cylinder; 12. connecting rod; 13. piston; 14. gasket; 15. spring 1; 16. rectangular hole; 17. lifting block; 18. fixed end; 19. sliding end; 20. vent hole; 21. baffle 1; 22. long board; 23. baffle 2; 24. spring 2; 25. threaded hole; 26. knob; 27. slide cover. DETAILED DESCRIPTION

[0037] The present invention provides a multifunctional measuring instrument for engineering surveying and mapping, and the technical scheme is as follows:

[0038] See also Figures 1 to 9 A multifunctional measuring instrument for engineering surveying and mapping includes a camera 1 and a base 2, the camera 1 is rotatably connected to the base 2, three legs 3 are hinged at the bottom of the base 2, and a leg 2 4 is slidably connected to the leg 1 3, a mounting seat 5 is fixedly installed at the bottom of the base 2, three guide rails 6 are fixedly installed inside the mounting seat 5, and three adjustment components with sliders 7 are also arranged inside the mounting seat 5, the three sliders 7 are all slidably connected to the three guide rails 6, a buffer pad 8 is arranged on one side of the guide rail 6, and the slider 7 contacts the buffer pad 8, when the base 2 tilts, the slider 7 slides on the guide rail 6 in a direction away from the buffer pad 8, and at this time the adjustment component controls the leg 2 4 to slide on the leg 1 3, and a stop component is also arranged inside the mounting seat 5, and when the base 2 is horizontal, the stop component stops the adjustment component from running.

[0039] For further information, see Figures 1 to 9, the adjustment component includes a connector 9, the number of connectors 9 is 3, and the three connectors 9 are hinged at the bottom of the base 2. The interior of the guide rail 6 is a hollow structure, and a vent hole 10 is also provided on the guide rail 6. The vent hole 10 connects the interior of the guide rail 6 with the outside of the guide rail 6. The connector 9 is a hollow structure, one end of the connector 9 is fixedly connected to the guide rail 6, and the interior of the connector 9 is connected to the interior of the guide rail 6. The other end of the connector 9 is also fixedly connected to a gas cylinder 11, and the interior of the connector 9 is connected to the interior of the gas cylinder 11. A connecting rod 12 is fixedly connected to the second leg 4, and one end of the connecting rod 12 is fixedly connected Piston 13, piston 13 is slidably connected inside the gas cylinder 11, the outer side of the piston 13 is in contact with the inner wall of the gas cylinder 11, the stop assembly includes a gasket 14, the gasket 14 is fixedly connected to the bottom of the slider 7, a spring 15 is also provided inside the mounting seat 5, the number of springs 15 is 3, one end of the spring 15 is fixedly connected to the gasket 14, and the other end of the spring 15 is fixedly connected to the inner wall of the mounting seat 5, the spring 15 pushes the slider 7 toward the outside of the mounting seat 5, when the base 2 is tilted, the slider 7 compresses the spring 15 in the direction away from the buffer pad 8 and slides on the guide rail 6.

[0040] See also Figures 1 to 9 , three rectangular holes 16 are provided on the mounting seat 5, and the three rectangular holes 16 are respectively located at the ends of the three guide rails 6, and the three rectangular holes 16 are hinged with a lifting block 17. When the three legs 3 are retracted, the legs 3 are in contact with one end of the lifting block 17, and the other end of the lifting block 17 is in contact with the slider 7. At this time, the distance from the end of the lifting block 17 in contact with the slider 7 to the inner wall of the mounting seat 5 is equal to the width of the vent hole 10. The gas cylinder 11 includes a fixed end 18 and a sliding end 19. The fixed end 18 is fixedly connected to the connector 9, and the sliding end 19 is slidably connected to the fixed end 18. The piston 13 is slidably connected to the inside of the sliding end 19. A vent hole 20 is provided at the bottom of the connector 9, and the vent hole 20 connects the inside of the connector 9 with the inside of the fixed end 18. Baffles 21 are hinged on both sides of the vent hole 20, and a torsion spring is provided at the hinge between the baffle 21 and the connector 9. A long plate is fixedly connected to the inside of the sliding end 19 22, a baffle plate 23 is fixedly connected to one end of the long plate 22, a spring 24 is arranged between the fixed end 18 and the sliding end 19, the baffle plate 1 21 fits with the baffle plate 23, at this time the fixed end 18 and the sliding end 19 are not connected internally, when the sliding end 19 squeezes the spring, the baffle plate 23 moves away from the baffle plate 1 21, at this time the fixed end 18 and the sliding end 19 are connected internally, a threaded hole 25 is opened on the leg 1 3, a knob 26 is also arranged on the leg 1 3, the knob 26 passes through the threaded hole 25 and is threadedly connected to the leg 1 3, one end of the knob 26 passes through the leg 1 3 and contacts with the leg 2 4, the venting hole 10 is located at the front side of the buffer pad 8 and fits with the buffer pad 8, when the slider 7 contacts with the buffer pad 8, the slider 7 completely blocks the venting hole 10, and three sliding covers 27 are arranged on the mounting seat 5, the three sliding covers 27 are all slidably connected to the mounting seat 5, and the three sliding covers are respectively located at the outlets of the three venting holes 10.

[0041] See also Figures 1 to 9 When the staff installs the multifunctional measuring instrument for engineering surveying, they first slide the three sliding covers 27 on the mounting seat 5 to ensure that the three vent holes 10 are all in an unobstructed state, and then all the three leg legs 24 are stretched out of the leg legs 24. During the movement of the leg legs 13, the connecting rod 12 and the piston 13 on the leg legs 13 move together with the leg legs 13. At this time, the baffle 121 on the vent hole 20 is opened toward the sliding end 19 under the action of pressure. At this time, the outside of the gas mounting seat 5 enters the inside of the gas cylinder 11 through the vent hole 10 and the vent hole 20. When the three leg legs 24 are fully pulled out, the three leg legs 13 are rotated. , so that the three legs 13 are unfolded outward, and the connector 9 rotates toward the outside of the mounting seat 5 following the leg 13. At this time, one end of the connector 9 is away from the jacking block 17 on the rectangular hole 16 and no longer applies pressure to the jacking block 17, so that the jacking block 17 does not apply pressure to the slider 7. When the three legs 13 are fully unfolded, the multifunctional measuring instrument for engineering surveying and mapping leg 24 is placed downward on the ground. At this time, the leg 13 will bear the gravity of the multifunctional measuring instrument for engineering surveying and mapping. At this time, the fixed end 18 will squeeze the internal spring 24. At this time, the leg 13 will move along the direction of the leg 24, and the internal baffle 23 of the sliding end 19 will gradually move. The baffle plate 21 is far away from the fixed end 18. When the frame leg 3 stops moving and the baffle plate 23 is completely away from the baffle plate 21, the base 2 will tilt because it has not been adjusted yet. At this time, the slider 7 at the lower position is pressed by the spring 15 and moves along the guide rail 6 toward the vent hole 10, and completely blocks the vent hole 10. The slider 7 at the higher position will squeeze the spring due to its own gravity and move along the guide rail 6 in the direction away from the vent hole 10. At this time, the frame leg 24 on this side will be affected by the gravity of the multifunctional measuring instrument for engineering surveying and mapping, so that the piston 13 inside the sliding end 19 continuously squeezes the gas cylinder 11. The gas inside the gas cylinder 11 is discharged from the outside of the mounting seat 5 through the vent hole 10. At this time, the leg 2 4 on this side continues to shrink, and when the base 2 is close to horizontal, the spring 15 will push the slider 7 to move, so that all the sliders 7 inside the mounting seat 5 are in contact with the buffer pad 8 and all the vent holes 10 are blocked. At this time, the staff turns the knobs 26 on the three legs 3 respectively. At this time, one end of the knob 26 moves along the threaded hole 25 toward the leg 2 4 and against the leg 2 4. At this time, the staff completes the placement of the multifunctional measuring instrument for engineering surveying and completes the rough adjustment of the horizontality.

[0042] A specific embodiment of the present invention is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above described embodiment. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.

Claims

1. A multifunctional measuring instrument for engineering surveying and mapping, comprising a camera (1) and a base (2), wherein the camera (1) is rotatably connected to the base (2), the base (2) is hinged with three legs (3) at the bottom, and the legs (3) are also slidably connected with legs (4), characterized in that: A mounting seat (5) is fixedly installed at the bottom of the base (2), and three guide rails (6) are fixedly installed inside the mounting seat (5). Three adjustment components with sliders (7) are also arranged inside the mounting seat (5). The three sliders (7) are slidably connected to the three guide rails (6). A buffer pad (8) is arranged on one side of the guide rail (6). The slider (7) contacts the buffer pad (8). When the base (2) tilts, the slider (7) slides on the guide rail (6) in a direction away from the buffer pad (8). At this time, the adjustment component controls the second leg (4) to slide on the first leg (3). A stop component is also arranged inside the mounting seat (5). When the base (2) is horizontal, the stop component stops the adjustment component from running.

2. A multifunctional measuring instrument for engineering surveying and mapping according to claim 1, characterized in that: The adjustment component includes a connector (9), the number of the connectors (9) is 3, and the three connectors (9) are hinged at the bottom of the base (2). The interior of the guide rail (6) is a hollow structure, and the guide rail (6) is also provided with a venting hole (10), and the venting hole (10) connects the interior of the guide rail (6) with the exterior of the guide rail (6). The connector (9) is a hollow structure, one end of the connector (9) is fixedly connected to the guide rail (6), and the interior of the connector (9) is connected to the interior of the guide rail (6). The other end of the connector (9) is also fixedly connected to a gas cylinder (11), and the interior of the connector (9) is connected to the interior of the gas cylinder (11). A connecting rod (12) is fixedly connected to the second leg (4), and one end of the connecting rod (12) is fixedly connected to a piston (13), and the piston (13) is slidably connected to the interior of the gas cylinder (11), and the exterior of the piston (13) is in contact with the inner wall of the gas cylinder (11).

3. The multifunctional measuring instrument for engineering surveying and mapping according to claim 2, characterized in that: The stop assembly comprises a gasket (14), wherein the gasket (14) is fixedly connected to the bottom of the slider (7), and a spring (15) is also arranged inside the mounting seat (5). The number of the springs (15) is 3, and one end of the spring (15) is fixedly connected to the gasket (14), and the other end of the spring (15) is fixedly connected to the inner wall of the mounting seat (5). The spring (15) pushes the slider (7) toward the outside of the mounting seat (5). When the base (2) tilts, the slider (7) compresses the spring (15) in a direction away from the buffer pad (8) and slides on the guide rail (6).

4. The multifunctional measuring instrument for engineering surveying and mapping according to claim 3, characterized in that: Three rectangular holes (16) are provided on the mounting seat (5), and the three rectangular holes (16) are respectively located at the ends of the three guide rails (6). The three rectangular holes (16) are hinged with a lifting block (17). When the three legs (3) are retracted, the legs (3) are in contact with one end of the lifting block (17), and the other end of the lifting block (17) is in contact with the slider (7). At this time, the distance from the end of the lifting block (17) in contact with the slider (7) to the inner wall of the mounting seat (5) is equal to the width of the vent hole (10).

5. The multifunctional measuring instrument for engineering surveying and mapping according to claim 4, characterized in that: The gas cylinder (11) comprises a fixed end (18) and a sliding end (19), wherein the fixed end (18) is fixedly connected to the connector (9), the sliding end (19) is slidably connected to the fixed end (18), the piston (13) is slidably connected inside the sliding end (19), a vent hole (20) is provided at the bottom of the connector (9), the vent hole (20) connects the inside of the connector (9) with the inside of the fixed end (18), baffle plates (21) are hinged on both sides of the vent hole (20), and the baffle plates (21) are hinged to the connector (9). A torsion spring is provided at the hinge, a long plate (22) is fixedly connected inside the sliding end (19), one end of the long plate (22) is fixedly connected to a second baffle (23), a second spring (24) is provided between the fixed end (18) and the sliding end (19), the first baffle (21) and the second baffle (23) are in contact with each other, at this time, the fixed end (18) and the sliding end (19) are not connected inside, when the sliding end (19) squeezes the spring, the second baffle (23) moves away from the first baffle (21), at this time, the fixed end (18) and the sliding end (19) are connected inside.

6. The multifunctional measuring instrument for engineering surveying and mapping according to claim 5, characterized in that: The first leg (3) is provided with a threaded hole (25), and the first leg (3) is also provided with a knob (26). The knob (26) passes through the threaded hole (25) and is threadedly connected to the first leg (3). One end of the knob (26) passes through the first leg (3) and contacts the second leg (4).

7. The multifunctional measuring instrument for engineering surveying and mapping according to claim 3, characterized in that: The vent hole (10) is located at the front side of the buffer pad (8) and is in contact with the buffer pad (8). When the slider (7) is in contact with the buffer pad (8), the slider (7) completely blocks the vent hole (10).

8. The multifunctional measuring instrument for engineering surveying and mapping according to claim 7, characterized in that: Three sliding covers (27) are arranged on the mounting seat (5), the three sliding covers (27) are all slidably connected to the mounting seat (5), and the three sliding covers (27) are respectively located at the outlets of three air release holes (10).

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