Terrain flatness measuring device for land space planning

Abstract

The invention belongs to the technical field of terrain flatness measurement, and particularly relates to a terrain flatness measuring device for territorial space planning, which comprises a counterweight hemisphere, a mounting frame is fixedly connected to the top end of the counterweight hemisphere, first rotating rods are fixedly connected to the front end and the rear end of the mounting frame, and a rotating ring is jointly and rotationally connected to the exteriors of the two first rotating rods. Second rotating rods are fixedly connected to the two sides of the rotating ring correspondingly, supporting frames are rotationally connected to the ends, away from the rotating ring, of the two second rotating rods correspondingly, and index plates are installed outside the first rotating rods and the second rotating rods correspondingly. Through the arrangement of the counterweight hemisphere, the mounting rack, the first rotating rod, the rotating ring and the second rotating rod which cooperate with each other under the action of gravity, two groups of data are produced while the topographic flatness is measured, so that the detection data during topographic flatness measurement are more comprehensive, the detection data of the topographic flatness are more stereoscopic, and the detection accuracy is improved. And the precision of terrain flatness detection is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of terrain flatness measurement, and specifically relates to a terrain flatness measurement device for land space planning. Background Art

[0002] Land space planning is a guide for the country's spatial development and a spatial blueprint for sustainable development. It is the basic basis for various development, protection, and construction activities. In the process of establishing a land space planning system and supervising its implementation, it is necessary to integrate spatial plans such as main functional area planning, land use planning, and urban and rural planning into a unified land space planning to achieve "multiple plans in one", and strengthen the guiding and restrictive role of land space planning on various special plans. In this process, the measurement of terrain flatness is essential.

[0003] Some solutions have also been proposed in the prior art for terrain flatness measurement. For example, a Chinese patent with the publication number CN114252048B discloses a terrain flatness measurement device for land space planning. By means of a distance sensor arranged on the mounting ring, it can measure the distance between the distance sensor and the bottom of the base, thereby being able to calculate the flatness.

[0004] In the above technical solution, it is proposed to detect the flatness of the terrain by means of a distance sensor. However, there are quite a few drawbacks in actual use. For example, in a long uphill section, the distance sensor only works during the uphill and downhill processes and cannot effectively measure the slope. At the same time, if the vehicle happens to be driving on a ground protrusion on one side, since the distance sensor can only simply detect the distance from the installation position to the ground and knows that there is a protrusion here, it cannot accurately give the data of the protrusion.

[0005] Therefore, the present invention provides a terrain flatness measurement device for land space planning. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art and solve at least one of the technical problems proposed in the background art.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: A terrain flatness measurement device for land space planning according to the present invention includes a counterweight hemisphere. The top of the counterweight hemisphere is fixedly connected with a mounting frame. Both the front and rear ends of the mounting frame are fixedly connected with a first rotating rod. A rotating ring is rotatably connected to the outside of the two first rotating rods. Both sides of the rotating ring are fixedly connected with a second rotating rod. One end of the two second rotating rods away from the rotating ring is rotatably connected with a support frame. Index plates are installed on the outside of the first rotating rod and the second rotating rod. The index plate is fixedly connected with the rotating ring through a connecting rod.

[0008] Preferably, a dial is installed inside the dividing plate, a pointer is slidably connected to the side of the dial close to the rotating ring, the two No. 1 rotating rods are fixedly connected to the pointer, and the two No. 2 rotating rods pass through the pointer and are fixedly connected to it.

[0009] Preferably, a paddle is fixedly connected to the top of the pointer, and a variable resistor is slidably connected to the end of the paddle away from the dial.

[0010] Preferably, a lubrication assembly is provided above the No. 1 rotating rod and the No. 2 rotating rod, and the lubrication assembly includes an oil storage shell, and the four oil storage shells are fixedly connected to the rotating ring and the support frame respectively, and a counterweight piston is slidably connected inside the oil storage shell, and a telescopic rod is fixedly connected to the top of the counterweight piston, and the telescopic rod passes through the oil storage shell and is slidably connected thereto, and a limit plate is fixedly connected to the top of the telescopic rod, and the limit rods are slidably connected inside the limit plate and on both sides of the telescopic rod, and a pair of support springs are provided on the outside of the limit rods.

[0011] Preferably, an air intake pipe is connected through the outside of the oil storage shell and below the counterweight piston, and a flow guide pipe is connected through the bottom of the oil storage shell. One-way valves are installed inside the flow guide pipe and the air intake pipe.

[0012] Preferably, the interior of the counterweight hemisphere is hollow, and the bottom end of the counterweight hemisphere is slidably connected to a guide plug, and a bellows is fixedly connected to the bottom of the counterweight hemisphere and located outside the guide plug, and a spray pipe is fixedly connected to the bottom of the bellows, and a mounting plate is fixedly connected to the outside of the spray pipe, and both ends of the mounting plate are respectively fixedly connected to the support frame, and a discharge assembly is arranged between the guide plug and the bellows, and the discharge assembly is used to connect the interior of the counterweight hemisphere with the outside through the guide plug when the mounting plate is tilted.

[0013] Preferably, the discharge assembly includes a No. 1 support block and a No. 2 support block, and the No. 1 support block and the No. 2 support block are respectively fixedly connected to the spray pipe and the guide plug through a plurality of short rods, a pull cable is fixedly connected between the No. 1 support block and the No. 2 support block, a positioning rod is fixedly connected to the top of the guide plug, and a support plate is slidably connected to the top of the positioning rod, and the support plate is fixedly connected to the inner wall of the counterweight hemisphere through a plurality of inclined rods, and a return spring is fixedly connected between the guide plug and the support plate and on the outside of the positioning rod.

[0014] Preferably, a connecting rope is fixedly connected to the top of the support plate, and a plurality of connecting ropes are fixedly connected to the tops of floating sheets.

[0015] Preferably, a plurality of air cavities are formed inside the mounting frame. Both sides of the air cavity are communicated with the top surface of the mounting frame through an air exchange pipe, and the bottom of the air cavity is communicated with the inside of the counterweight hemisphere through a blowing pipe. An iron ball is arranged inside the air cavity above the connection part between the air cavity and the air exchange pipe. An elastic cloth is fixedly connected between the iron ball and the inner wall of the air cavity. One-way valves are installed inside both the air exchange pipe and the blowing pipe.

[0016] Preferably, an electromagnet is fixedly connected to the top surface of the inner wall of the air cavity.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. For a terrain flatness measuring device for land spatial planning according to the present invention, by arranging a counterweight hemisphere, a mounting frame, a first rotating rod, a rotating ring, and a second rotating rod, they cooperate with each other under the action of gravity, and two groups of data are generated simultaneously when measuring the terrain flatness, so that the detection data during terrain flatness measurement is more comprehensive, making the detection data of terrain flatness more three-dimensional and improving the accuracy of terrain flatness detection.

[0019] 2. For a terrain flatness measuring device for land spatial planning according to the present invention, when the mobile device travels to a raised part, the mobile device will tilt to a certain extent, thereby driving the mounting plate to tilt. At this time, the paint discharging assembly starts to work and discharges the paint, achieving the effect of automatically marking the raised part. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 is a three-dimensional view of the present invention;

[0022] Figure 2 is a front view of the present invention;

[0023] Figure 3 is a side view of the present invention;

[0024] Figure 4 is a schematic structural diagram of the mounting frame in the present invention;

[0025] Figure 5 is a schematic structural diagram of the pointer in the present invention;

[0026] Figure 6 is a schematic structural diagram of the rheostat in the present invention;

[0027] Figure 7 is a partial cross-sectional view of the oil storage shell in the present invention;

[0028] Figure 8 is a partial cross-sectional view of the counterweight hemisphere in the present invention;

[0029] Figure 9 It is a schematic diagram of the floating plate structure in the present invention;

[0030] Figure 10 It is a schematic diagram of the spraying pipe structure in the present invention;

[0031] Figure 11 It is the present invention Figure 8 An enlarged schematic diagram at position A.

[0032] In the figure: 1, counterweight hemisphere; 2, mounting bracket; 3, first rotating rod; 4, rotating ring; 5, second rotating rod; 6, support frame; 7, indexing plate; 8, dial; 9, pointer; 10, paddle; 11, rheostat; 12, oil storage shell; 13, counterweight piston; 14, telescopic rod; 15, limiting plate; 16, limiting rod; 17, diversion pipe; 18, intake pipe; 19, diversion plug; 20, bellows; 21, spraying pipe; 22, mounting plate; 23, first support block; 24, cable; 25, second support block; 26, positioning rod; 27, support disc; 28, connecting rope; 29, floating plate; 30, air cavity; 31, air exchange pipe; 32, blowing pipe; 33, iron ball; 34, elastic cloth; 35, electromagnet. Specific embodiments

[0033] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0034] As Figures 1 to 6 shown, a topographic flatness measuring device for territorial space planning according to an embodiment of the present invention includes a counterweight hemisphere 1, the top end of the counterweight hemisphere 1 is fixedly connected with a mounting bracket 2, both the front and rear ends of the mounting bracket 2 are fixedly connected with a first rotating rod 3, and the outer parts of the two first rotating rods 3 are jointly rotatably connected with a rotating ring 4. Both sides of the rotating ring 4 are fixedly connected with a second rotating rod 5, and the ends of the two second rotating rods 5 away from the rotating ring 4 are rotatably connected with a support frame 6. Indexing plates 7 are installed on the outer parts of the first rotating rod 3 and the second rotating rod 5, and the indexing plates 7 are fixedly connected with the rotating ring 4 through connecting rods; during work, when this embodiment is in use, first, the device needs to be installed on a vehicle or other mobile device through the support frame 6. It should be noted that the levelness of the installation position needs to be ensured, and there should be no protrusions or depressions on the surface of the installation position. After the device is installed, drive the mobile device to the area to be measured and move along the planned measurement path to measure;

[0035] Taking Figure 1 the front and rear ends of the vehicle as the forward and backward directions of the vehicle as an example, when starting the measurement, it can be split into the following scenarios:

[0036] Scenario 1: When the mobile device travels to an uphill area and assuming that the left and right sides of the mobile device are at the same height at this time, the mobile device will tilt to adapt to the slope or protrusion. When the mobile device tilts, the support frame 6 will also tilt accordingly. Under the action of gravity, the counterweight hemisphere 1 will exert a continuous pulling force on the mounting bracket 2, thus always pulling the mounting bracket 2 vertically downward. Under the action of this pulling force, the rotating ring 4 will drive the second rotating rod 5 to deflect by a certain angle inside the support frame 6. Since the left and right sides of the mobile device are at the same height at this time, there is no force in the left and right directions, so the mounting bracket 2 will not drive the first rotating rod 3 to deflect on the rotating ring 4. When the second rotating rod 5 deflects, it will cause the reading in the dial 7 to change. By the change of the reading inside the dial 7, the inclination angle of the slope can be known;

[0037] Scenario 2: When the mobile device travels on the road surface and there is a situation where one side of the mobile device is higher than the other side, that is, one side of the device's tires travels on a soil slope, and assuming that the front and rear ends of the mobile device are at the same height at this time, under the action of gravity, the mounting bracket 2 will drive the first rotating rod 3 to deflect inside the rotating ring 4. When the first rotating rod 3 deflects, it will cause the reading in the dial 7 to change. By the change of the reading inside the dial 7, the inclination angle of the slope can be known;

[0038] Scenario 3: When the mobile device travels to an uphill area and one side of the mobile device is higher than the other side, at this time, under the action of gravity, both the first rotating rod 3 and the second rotating rod 5 will deflect to varying degrees;

[0039] By setting the counterweight hemisphere 1, the mounting bracket 2, the first rotating rod 3, the rotating ring 4, and the second rotating rod 5, they cooperate with each other under the action of gravity, generating two groups of data simultaneously when measuring the terrain flatness, thus making the detection data more comprehensive when measuring the terrain flatness, making the detection data of the terrain flatness more three-dimensional, and improving the accuracy of the terrain flatness detection.

[0040] As Figures 1 to 6 shown, a dial 8 is installed inside the dial 7. A pointer 9 is slidably connected to the side of the dial 8 close to the rotating ring 4. Both of the first rotating rods 3 are fixedly connected to the pointer 9. Both of the second rotating rods 5 penetrate through the pointer 9 and are fixedly connected to it; during operation, when the first rotating rod 3 or the second rotating rod 5 deflects, it will simultaneously drive the pointer 9 to slide on the dial 8, and the operator can record the current ground flatness situation by observing the data on the dial 8.

[0041] As Figures 5 to 6As shown, a dial 10 is fixedly connected to the top end of the pointer 9, and a variable resistor 11 is slidably connected to the end of the dial 10 away from the dial 8. During operation, there are certain deviations and large errors when observing data with the naked eye by humans, and there is also the situation that humans forget to record. In the embodiment of the present invention, a dial 10 and a variable resistor 11 are also designed. During the rotation of the pointer 9 with the first rotating rod 3 or the second rotating rod 5, the pointer 9 will also drive the dial 10 to slide on the variable resistor 11, thereby changing the resistance value of the variable resistor 11 in the circuit. By energizing the variable resistor 11 and monitoring the change of its resistance value, the position of the pointer 9 at this time can be known, and thus the flatness of the current ground can be known. Moreover, the resistance value data of the variable resistor 11 can also be transmitted through wireless signals, so as to achieve the effect of remote monitoring. In this way, the effect of automatically recording the terrain flatness data is achieved.

[0042] As Figures 1 to 4 , Figure 7 As shown, lubricating components are arranged above the first rotating rod 3 and the second rotating rod 5. The lubricating components include oil storage shells 12. The four oil storage shells 12 are respectively fixedly connected to the rotating ring 4 and the support frame 6. A counterweight piston 13 is slidably connected inside the oil storage shell 12. An expansion rod 14 is fixedly connected to the top end of the counterweight piston 13. The expansion rod 14 penetrates through the oil storage shell 12 and is slidably connected to it. A limiting plate 15 is fixedly connected to the top end of the expansion rod 14. Limiting rods 16 are slidably connected to both sides of the expansion rod 14 inside the limiting plate 15. A pair of support springs are sleeved outside the limiting rods 16.

[0043] An air inlet pipe 18 is connected in a penetrating manner to the outside of the oil storage shell 12 and below the counterweight piston 13. A diversion pipe 17 is connected in a penetrating manner to the bottom of the oil storage shell 12. Check valves are installed inside both the diversion pipe 17 and the air inlet pipe 18. During operation, when the mobile device is moving, it is inevitable that bumps will occur due to terrain problems. When bumps occur, the counterweight piston 13 inside the oil storage shell 12 will move up and down reciprocally. Specifically, when the counterweight piston 13 moves upward, it will drive the telescopic rod 14 to move upward. The movement of the telescopic rod 14 drives the limit plate 15 to move. The movement of the limit plate 15 stretches the support spring and then slides along the limit rod 16. At this time, the counterweight piston 13 will suck in external air through the air inlet pipe 18. Then the support spring gradually returns to its original position, pulling the limit plate 15 to move. The movement of the limit plate 15 pushes the counterweight piston 13 to slide downward inside the oil storage shell 12. At this time, the counterweight piston 13 will squeeze the air inside the oil storage shell 12 and press the lubricating oil stored inside the oil storage shell 12 into the connection between the first rotating rod 3 and the rotating ring 4 or the second rotating rod 5 and the support frame 6 for lubrication. It should be noted that the check valve inside the diversion pipe 17 is of the type that discharges to the outside of the oil storage shell 12, and the check valve inside the air inlet pipe 18 is of the type that enters the oil storage shell 12. Through such a design, the effect of automatically lubricating the first rotating rod 3 and the rotating ring 4 or the second rotating rod 5 and the support frame 6 is achieved, which can avoid abnormal rotation of the first rotating rod 3 and the rotating ring 4 or the second rotating rod 5 and the support frame 6 due to friction problems, and further avoid abnormal detection data, thereby improving the accuracy of the terrain flatness detection data. It should be noted that the amount of oil stored inside the oil storage shell 12 should be the same initially. After a period of use, it needs to be replenished in a timely manner to avoid a large deviation in the oil inside the oil storage shell 12, which may affect the detection accuracy.

[0044] Such as Figures 1 to 4 、 Figures 8 - 10As shown, the interior of the counterweight hemisphere 1 is hollow. A flow guide plug 19 is slidably connected to the bottom end of the counterweight hemisphere 1. A corrugated pipe 20 is fixedly connected to the bottom of the counterweight hemisphere 1 and outside the flow guide plug 19. A spraying pipe 21 is fixedly connected to the bottom of the corrugated pipe 20. An installation plate 22 is fixedly connected to the outside of the spraying pipe 21. Both ends of the installation plate 22 are fixedly connected to the support frame 6 respectively. A flow discharging assembly is arranged between the flow guide plug 19 and the corrugated pipe 20. The flow discharging assembly is used to connect the interior of the counterweight hemisphere 1 with the outside through the flow guide plug 19 when the installation plate 22 is tilted; during operation, after detecting the terrain flatness, if there is a need to level the raised part, the raised part needs to be marked at this time. At this time, paint can be injected into the interior of the counterweight hemisphere 1. If there is no such requirement, there is no need to inject paint; after injecting the paint, when the mobile device travels to the raised part, the mobile device will tilt to a certain extent, thus driving the installation plate 22 to tilt. At this time, the flow discharging assembly starts to work, connecting the interior of the counterweight hemisphere 1 with the outside through the flow guide plug 19. Then the paint injected into the interior of the counterweight hemisphere 1 will flow out through the flow guide plug 19. The flowing paint will flow into the spraying pipe 21 through the corrugated pipe 20. Before actual use, a nozzle can be externally connected to the outside of the spraying pipe 21, so that the paint is sprayed out through the nozzle, thereby marking the raised part; specifically, the installation position of the nozzle can be selected at the axis of the front wheel of the mobile device. In this way, as soon as the front wheel of the mobile device contacts the raised part and tilts itself, the marking can start; in this way, the effect of automatically marking the uneven terrain is achieved, which is convenient for subsequent terrain processing; it should be noted that according to the different styles of the mobile device, there may be a situation where the raised area is too small, that is, less than the distance between the front and rear wheels of the mobile device. At this time, the paint in the counterweight hemisphere 1 will be mis-sprayed. Therefore, a solenoid valve can be added at the nozzle. During actual use, by observing the terrain flatness data, if the terrain tilt data appears and then returns in a very short time, and then the terrain tilt data appears again and the tilt data is exactly opposite to the previous upward tilt data, then the solenoid valve is closed at this time and no more paint is sprayed.

[0045] As Figures 1 to 4 、 Figures 8 - 10As shown, the discharging assembly includes a first support block 23 and a second support block 25. The first support block 23 and the second support block 25 are respectively fixedly connected to the spraying pipe 21 and the diversion plug 19 through a plurality of short rods. A cable 24 is fixedly connected between the first support block 23 and the second support block 25. The top end of the diversion plug 19 is fixedly connected with a positioning rod 26. The top end of the positioning rod 26 is slidably connected with a support disc 27. The support disc 27 is fixedly connected to the inner wall of the counterweight hemisphere 1 through a plurality of inclined rods. A return spring is fixedly connected between the diversion plug 19 and the support disc 27 and outside the positioning rod 26. During operation, it should be noted that a cavity is formed at the bottom end of the diversion plug 19, and diversion holes are formed on both sides of the diversion plug 19 at the cavity. The cavity is externally connected through the diversion holes. The second support block 25 is fixedly connected to the inner wall of the cavity through a short rod. In the initial state, the device described in the embodiment of the present invention is in a horizontal state. At this time, the cable 24 is in a taut state, and the return spring is in a stretched state. At this time, the diversion plug 19 is slidably connected inside the counterweight hemisphere 1, and the diversion holes are blocked by the inner wall of the counterweight hemisphere 1. Therefore, the paint inside the counterweight hemisphere 1 cannot be discharged through the diversion plug 19. When the traveling device tilts, the mounting plate 22 tilts at this time, driving the spraying pipe 21 to tilt. After the spraying pipe 21 tilts, it drives the first support block 23 to tilt. At this time, the height of the first support block 23 will change, so that the cable 24 cannot be pulled. At this time, the return spring loses the pulling force and starts to reset, thereby pulling the positioning rod 26 to slide upward in the support disc 27. The movement of the positioning rod 26 drives the diversion plug 19 to move until the diversion holes of the diversion plug 19 slide into the counterweight hemisphere 1. Therefore, the paint inside the counterweight hemisphere 1 can be injected into the cavity through the diversion holes and finally discharged through the cavity. Through the elastic movement of the return spring and the movement of the diversion plug 19, the paint at the bottom of the inner wall of the counterweight hemisphere 1 can also be stirred to avoid paint deposition.

[0046] As Figures 1 to 4 , Figures 8 - 10 shown, a connecting rope 28 is fixedly connected to the top end of the support disc 27. The top ends of a plurality of the connecting ropes 28 are fixedly connected with floating pieces 29. During operation, after the paint is injected into the counterweight hemisphere 1, although the gravity of the counterweight hemisphere 1 can be increased, the paint is prone to shake due to inertia during the movement of the mobile device. The inertial force generated by the shake will also affect the detection of the terrain flatness. Therefore, the floating pieces 29 are designed. When in use, the floating pieces 29 float on the surface of the paint, which can increase the surface tension of the paint, thereby reducing the shaking amplitude of the paint and improving the detection accuracy. It should be noted that when using the paint to mark the terrain, attention should be paid to the traveling speed of the traveling device to ensure the smoothness of the traveling and reduce the inertial error. The floating pieces 29 in the figure of the present invention are schematic diagrams in a floating state.

[0047] As Figures 1 to 4 ,Figures 8 - 11 As shown, a plurality of air cavities 30 are formed inside the mounting frame 2. Both sides of the air cavity 30 are communicated with the top surface of the mounting frame 2 through the air exchange pipes 31. The bottom of the air cavity 30 is communicated with the inside of the counterweight hemisphere 1 through the air blowing pipes 32. Inside the air cavity 30 and above the connection with the air exchange pipes 31, there is an iron ball 33. A elastic cloth 34 is fixedly connected between the iron ball 33 and the inner wall of the air cavity 30. One-way valves are installed inside both the air exchange pipes 31 and the air blowing pipes 32. During operation, when the traveling equipment is moving, once there is a bumpy situation, it will surely cause the paint inside the counterweight hemisphere 1 to shake. At this time, under the action of the bump, the iron ball 33 will pull the elastic cloth 34 to bounce back and forth inside the air cavity 30. When the iron ball 33 pulls the elastic cloth 34 to move upward, it will suck the external air through the air exchange pipes 31. Then the iron ball 33 pulls the elastic cloth 34 to move downward. At this time, the iron ball 33 will compress the air inside the air cavity 30 and blow it out through the air blowing pipes 32. The air blown out from multiple directions forms an air flow to interfere with the surface of the paint, dispersing the kinetic energy of the liquid ripples, so as to achieve a fast and stable effect.

[0048] As Figure 8 , Figure 11 shown, a through electromagnet 35 is fixedly connected to the top surface of the inner wall of the air cavity 30. During operation, by designing the through electromagnet 35, the iron ball 33 can be adsorbed when the paint is not in use, avoiding its influence on the accuracy during the non-paint detection. At the same time, the magnetic force of the through electromagnet 35 can also be changed through the gap to actively control the reciprocating lifting of the iron ball 33, so as to achieve the effect of independently controlling the air blowing.

[0049] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A terrain flatness measuring device for national land space planning, characterized in that: The invention comprises a weighted hemisphere (1), the top of the weighted hemisphere (1) is fixedly connected to a mounting frame (2), the front and rear ends of the mounting frame (2) are both fixedly connected to a first rotating rod (3), the exteriors of the two first rotating rods (3) are rotatably connected to a rotating ring (4), the two sides of the rotating ring (4) are both fixedly connected to a second rotating rod (5), the ends of the two second rotating rods (5) away from the rotating ring (4) are both rotatably connected to a supporting frame (6), and the exteriors of the first rotating rod (3) and the second rotating rod (5) are both installed with a dividing plate (7), and the dividing plate (7) is fixedly connected to the rotating ring (4) via a connecting rod.

2. The terrain flatness measuring device for national land space planning according to claim 1 is characterized in that: A dial (8) is installed inside the indexing plate (7), a pointer (9) is slidably connected to a side of the dial (8) close to the rotating ring (4), the two No. 1 rotating rods (3) are fixedly connected to the pointer (9), and the two No. 2 rotating rods (5) pass through the pointer (9) and are fixedly connected to it.

3. The terrain flatness measuring device for national land space planning according to claim 2, characterized in that: A paddle (10) is fixedly connected to the top end of the pointer (9), and a variable resistor (11) is slidably connected to one end of the paddle (10) away from the dial (8).

4. The terrain flatness measuring device for national land space planning according to claim 3 is characterized in that: A lubrication assembly is provided above the No. 1 rotating rod (3) and the No. 2 rotating rod (5), and the lubrication assembly comprises an oil storage shell (12). The four oil storage shells (12) are fixedly connected to the rotating ring (4) and the support frame (6) respectively. A counterweight piston (13) is slidably connected inside the oil storage shell (12). A telescopic rod (14) is fixedly connected to the top of the counterweight piston (13). The telescopic rod (14) passes through the oil storage shell (12) and is slidably connected thereto. The top of the telescopic rod (14) is fixedly connected to a limit plate (15). Limit rods (16) are slidably connected inside the limit plate (15) and on both sides of the telescopic rod (14). A pair of support springs are sleeved on the outside of the limit rods (16).

5. The terrain flatness measuring device for national land space planning according to claim 4, characterized in that: An air intake pipe (18) is connected through the outside of the oil storage shell (12) and below the counterweight piston (13), and a flow guide pipe (17) is connected through the bottom of the oil storage shell (12). Both the flow guide pipe (17) and the air intake pipe (18) are installed with a one-way valve.

6. The terrain flatness measuring device for national land space planning according to claim 5, characterized in that: The interior of the counterweight hemisphere (1) is hollow, and the bottom end of the counterweight hemisphere (1) is slidably connected to a guide plug (19), and a bellows (20) is fixedly connected to the bottom of the counterweight hemisphere (1) and located outside the guide plug (19), and a spray pipe (21) is fixedly connected to the bottom of the bellows (20), and a mounting plate (22) is fixedly connected to the outside of the spray pipe (21), and both ends of the mounting plate (22) are respectively fixedly connected to the support frame (6), and a discharge component is arranged between the guide plug (19) and the bellows (20), and the discharge component is used to connect the interior of the counterweight hemisphere (1) with the outside through the guide plug (19) when the mounting plate (22) is tilted.

7. The terrain flatness measuring device for national land space planning according to claim 6, characterized in that: The discharge assembly comprises a first support block (23) and a second support block (25), wherein the first support block (23) and the second support block (25) are respectively fixedly connected to the spray pipe (21) and the guide plug (19) through a plurality of short rods, a pull rope (24) is fixedly connected between the first support block (23) and the second support block (25), a positioning rod (26) is fixedly connected to the top end of the guide plug (19), a support plate (27) is slidably connected to the top end of the positioning rod (26), the support plate (27) is fixedly connected to the inner wall of the counterweight hemisphere (1) through a plurality of inclined rods, and a return spring is fixedly connected between the guide plug (19) and the support plate (27) and located outside the positioning rod (26).

8. The terrain flatness measuring device for national land space planning according to claim 7, characterized in that: A connecting rope (28) is fixedly connected to the top end of the support plate (27), and a plurality of connecting ropes (28) are fixedly connected to the top ends of floating sheets (29).

9. The terrain flatness measuring device for national land space planning according to claim 8, characterized in that: A plurality of air cavities (30) are provided inside the mounting frame (2); both sides of the air cavities (30) are connected to the top surface of the mounting frame (2) via a ventilation pipe (31); the bottom of the air cavity (30) is connected to the interior of the weighted hemisphere (1) via a blowing pipe (32); an iron ball (33) is provided inside the air cavity (30) and above the connection between the air cavity (30) and the ventilation pipe (31); an elastic cloth (34) is fixedly connected between the iron ball (33) and the inner wall of the air cavity (30); and one-way valves are installed inside both the ventilation pipe (31) and the blowing pipe (32).

10. The terrain flatness measuring device for national land space planning according to claim 9, characterized in that: The top surface of the inner wall of the air cavity (30) is fixedly connected with an electromagnet (35).

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