Land space planning topographic survey device

Abstract

The invention relates to the technical field of topographic survey, in particular to a territorial space planning topographic survey device which comprises a survey shell, the top of the survey shell is fixedly connected with a fixing rod, and the bottom of the survey shell is fixedly connected with a positioning rod; the outer surface of the positioning rod is fixedly connected with a supporting plate; the outer surface of the fixing rod is rotationally connected with a rotating ring, and the outer surface of the rotating ring is fixedly connected with a first adjusting rod; according to the invention, the electromagnet is electrified during measurement, the electromagnet and the measurement magnet generate like pole repulsion at the moment, the measurement magnet moves into the measurement shell, the measurement bottom plate can detect the magnetic force of the measurement magnet at the moment, and plane data are obtained by comparing the height difference of all the measurement magnets; the data obtained through the method are electronic measurement data, the measurement precision can be improved, paper does not need to be replaced as in the prior art when measurement errors occur, and measurement can be conducted again only by resetting the position of the measurement magnet.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of topographic survey, in particular to a land space planning topographic survey device. BACKGROUND

[0002] Land space planning is a guide for national space development, a spatial blueprint for sustainable development, and a basic basis for various development, protection and construction activities. It optimizes the development and protection pattern of land space, strengthens the protection and control of ecological space, strictly guards the boundaries of urban development, strictly controls the increase of urban construction land, and controls the time sequence of stages. At the same time, it also needs to increase the potential of existing land use, promote the composite use of aboveground and underground space, and improve the level of land conservation and intensive use. When using underground space, artificial excavation of pits and caves is often used, and gas storage tanks, oil storage tanks and the like are buried. At the same time, natural pits and caves can be used, but they need to be measured before use and the stability of the pits and caves needs to be analyzed to ensure the safety of the buried gas storage tanks, oil storage tanks and the like. Considering that there may be small concave or convex on the bottom surface of the pit when measuring the pit, the prior art can only measure the contour of the pit, but cannot obtain the depth information. When placing equipment such as gas storage tanks and oil storage tanks in the pit, uneven stress may occur due to the existence of concave or convex, which may cause the equipment to deteriorate in strength. If the convex is too large, the equipment may be punctured, which may cause internal gas and liquid to leak, which not only may cause resource waste, but also may cause land pollution. SUMMARY

[0003] The purpose of the present application is to provide a land space planning topographic survey device to solve the problems raised in the background art.

[0004] To solve the above technical problems, the present application is realized by the following technical scheme: The present application is a land space planning topographic survey device, comprising a measurement shell, a fixed rod is fixedly connected to the top of the measurement shell, and a positioning rod is fixedly connected to the bottom of the measurement shell; a support plate is fixedly connected to the outer surface of the positioning rod; A rotating ring is rotatably connected to the outer surface of the fixed rod, a first adjusting rod is fixedly connected to the outer surface of the rotating ring, a sliding groove is formed in one end of the first adjusting rod away from the rotating ring, a second adjusting rod is slidably connected in the sliding groove, a positioning block is fixedly connected to one end of the second adjusting rod away from the first adjusting rod, a detection unit is fixedly connected to one side of the positioning block away from the second adjusting rod, a lifting rod is slidably connected in the positioning block, and universal wheels are arranged at the bottom of the lifting rod; The inner bottom surface of the measuring shell is fixedly connected with a measuring bottom plate, a plurality of sliding holes are uniformly formed in the top of the measuring shell, and a measuring magnet is slidably connected in the sliding hole.

[0005] Further, a limiting shell is arranged between every two measuring magnets, the limiting shell is fixedly connected with the top of the measuring shell, limiting magnets are fixedly connected on both sides of the measuring shell close to the measuring magnets, and the limiting magnets are used for limiting and fixing the measuring magnets in the stop state.

[0006] Further, the adjusting unit comprises an adjusting block, an adjusting plate and two adjusting fixing frames, the first rack plate is fixedly connected to one side of the adjusting block close to the detection shell; the adjusting plate is slidably connected with the first rack plate, the second rack plate is fixedly connected to the top surface of one side of the adjusting plate close to the first rack plate, and the sliding groove is formed in one end of the adjusting plate close to the detection shell; the sliding groove is slidably connected with the lifting rod; The adjusting fixing frames are symmetrically fixed on both sides of the first adjusting rod, four through holes are formed in the surface close to the top of each adjusting fixing frame, the first rotating shaft, the first fixed shaft, the second fixed shaft and the second rotating shaft are arranged in the through hole from the lifting rod to the detection shell; the first rotating shaft and the second rotating shaft are fixedly connected with the through hole, and the first fixed shaft and the second fixed shaft are rotatably connected with the through hole; The outer surface of the first rotating shaft is rotatably connected with a driving gear, the driving gear is engaged with the first rack plate, the driving gear is engaged with a first large gear, the first large gear is fixedly connected with the first fixed shaft, the first fixed shaft is fixedly connected with a first small gear on the side away from the first large gear, the first small gear is engaged with a second large gear, the second large gear is fixedly connected with the second fixed shaft, the second fixed shaft is fixedly connected with a second small gear on the side away from the second large gear, the second small gear is engaged with a third large gear, the third large gear is rotatably connected with the second rotating shaft, and the third large gear is engaged with the second rack plate.

[0007] Further, the first adjusting rod is fixedly connected with a limiting plate on the top of one side close to the second adjusting rod, an adjusting support rod is slidably connected in the limiting plate, and the top of the adjusting support rod is fixedly connected with the adjusting plate.

[0008] Further, the detection unit comprises a detection shell, a sliding block is slidably connected in the detection shell, and a rotating shaft is rotatably connected to one end of the sliding block away from the detection shell.

[0009] Furthermore, a slot is provided inside the detection housing and the positioning block, and a reset spring is fixedly connected between the detection housing and the sliding block; a locking block is fixedly connected to the end of the sliding block away from the rotating shaft, the locking block is slidably connected to the slot, and energized contacts are provided on both sides of the locking block near the sliding block, and the energized contacts are electrically connected to the electromagnet.

[0010] Furthermore, a limiting block is slidably connected to the outer surface of the measuring rod, and the limiting block is slidably connected to the first adjusting rod.

[0011] Furthermore, a support frame is slidably connected to the outer surface of the positioning rod, and the bottom of the support frame is in contact with the ground.

[0012] The present invention has the following beneficial effects: 1. In this invention, an electromagnet is energized during measurement. At this time, the electromagnet and the measuring magnet repel each other, causing the measuring magnet to move into the measuring housing. The measuring base plate can detect the magnetic force of the measuring magnet and obtain planar data by comparing the height differences of all measuring magnets. The data obtained by this method is electronic measurement data, which not only increases the accuracy of the measurement, but also eliminates the need to replace paper as in existing technologies when measurement errors occur. Simply repositioning the measuring magnets is sufficient to remeasure.

[0013] 2. When the measuring rod descends, the distance between the electromagnet and the measuring magnet will be closer. Since the magnetic force of the electromagnet remains unchanged, when the electromagnet approaches the measuring distance, the measuring magnet will move further into the measuring housing. At this time, the measuring base plate will compare the height difference of the measuring magnet, thereby obtaining depth data during measurement. When measuring pits with special designs on the bottom, such as drainage channels, the data can be saved at the same time during measurement, so as to compare the rationality of the design later and ensure that the equipment will not be damaged after being placed in the pit.

[0014] 3. In this invention, the transmission ratio is reduced and the torque is decreased simultaneously when the first large gear, the first small gear, the second large gear, and the second small gear rotate. This achieves deceleration and proportionally reduces the distance the lifting rod moves and the distance the measuring rod moves. This prevents the measuring rod from deviating from the measurement area during measurement, thus reducing the occurrence of incomplete measurement data. More data can be obtained through proportionally reduced measurements, and more accurate dimensions can be obtained based on the reduction ratio during subsequent data analysis, thereby increasing measurement accuracy. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is an overall sectional view of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of a portion of point A in the middle; Figure 4 This is a partial view of the measuring casing of the present invention; Figure 5 This is a schematic diagram of the structure of the first adjusting rod, the second adjusting rod, and the adjusting unit of the present invention; Figure 6 This is an exploded view of the first adjusting rod, the second adjusting rod, and the adjusting unit of the present invention; Figure 7 This is a partial view of the measuring rod of the present invention; Figure 8 This is a schematic diagram of the structure at the drive gear of the present invention; Figure 9 This is a schematic diagram of the structure of the detection unit of the present invention; Figure 10 This is a cross-sectional view of the detection unit of the present invention.

[0017] The attached diagram lists the components represented by each number as follows: In the diagram: 1. Measuring housing; 11. Measuring magnet; 112. Measuring base plate; 113. Limiting housing; 114. Limiting magnet; 12. Fixing rod; 121. Rotating ring; 13. Positioning rod; 131. Support frame; 132. Support plate; 14. First adjusting rod; 141. Adjusting slot; 142. Second adjusting rod; 143. Sliding slot; 144. Adjusting fixing frame; 145. Limiting plate; 15. Measuring rod; 151. Limiting block; 152. Electromagnet; 16. Lifting rod; 161. Positioning block; 162. Adjusting block; 163. Caster wheel; 2. Adjusting unit; 21. First rack plate; 22. Adjusting plate; 221. Second rack plate; 222. Adjusting support rod; 223. Sliding groove; 23. Drive gear; 231. First rotating shaft; 24. First large gear; 241. First fixed shaft; 242. First small gear; 25. Second large gear; 251. Second fixed shaft; 252. Second small gear; 26. Third large gear; 261. Second rotating shaft; 3. Detection unit; 31. Detection housing; 32. Sliding block; 33. Rotating shaft; 34. Locking block; 341. Power contact; 342. Locking groove; 35. Return spring. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-10 As shown, the present invention is a land spatial planning topographic surveying device, including a surveying shell 1, a fixing rod 12 fixedly connected to the top of the surveying shell 1, a positioning rod 13 fixedly connected to the bottom of the surveying shell 1, and a support plate 132 fixedly connected to the outer surface of the positioning rod 13. A rotating ring 121 is rotatably connected to the outer surface of the fixed rod 12. A first adjusting rod 14 is fixedly connected to the outer surface of the rotating ring 121. A sliding groove 143 is provided at the end of the first adjusting rod 14 away from the rotating ring 121. A second adjusting rod 142 is slidably connected in the sliding groove 143. A positioning block 161 is fixedly connected to the end of the second adjusting rod 142 away from the first adjusting rod 14. A detection unit 3 is fixedly connected to the side of the positioning block 161 away from the second adjusting rod 142. A lifting rod 16 is slidably connected in the positioning block 161. A universal wheel 163 is provided at the bottom of the lifting rod 16. A measuring base plate 112 is fixedly connected to the bottom surface of the measuring housing 1. Multiple sliding holes are evenly opened on the top of the measuring housing 1, and a measuring magnet 11 is slidably connected in the sliding holes. An adjusting groove 141 is opened on the surface of the first adjusting rod 14 near the rotating ring 121. A measuring rod 15 is slidably connected in the adjusting groove 141. An electromagnet 152 is fixedly connected to the bottom of the measuring rod 15. An adjusting unit 2 is provided between the measuring rod 15 and the lifting rod 16.

[0020] In this embodiment, considering that when measuring a pit, there may be small depressions or protrusions on the bottom surface of the pit, the existing technology can only measure the outline of the pit and cannot obtain depth information. When it is necessary to place equipment, such as gas tanks or oil tanks, into the pit, the presence of depressions or protrusions may cause uneven stress, resulting in poor equipment strength. If the protrusion is too large, it may cause the equipment to be punctured, which may lead to internal gas and liquid leakage. This may not only waste resources but also pollute the land. Before measurement, the positioning rod 13 is inserted into the ground and contacts the ground through the support plate 132. At this time, the position of the measuring shell 1 can be fixed. Then, the lifting rod 16 is pulled to the pit wall. At this time, the second telescopic rod will slide in the sliding groove 143 in the first telescopic rod until the lifting rod 16 contacts the pit wall. At this time, the positioning work before measurement is completed. During measurement, the lifting rod 16 rotates along the edge of the pit, causing the positioning block 161 to rotate around the fixed rod 12. The rotation of the positioning block 161 causes the second adjusting rod 142 and the first adjusting rod 14 to rotate as well, and the rotating ring 121 to rotate on the fixed rod 12. When the first adjusting rod 14 rotates, it causes the measuring rod 15 in the adjusting slot 141 to rotate. At this time, the measuring rod 15 is energized, and the electromagnet 152 at the bottom of the measuring rod 15 is also energized. The electromagnet 152 generates a magnetic field, and the magnetic poles at the bottom of the electromagnet 152 align with the top of the measuring magnet 11. When the poles are identical, the electromagnet 152 will repel the measuring magnet 11, causing the measuring magnet 11 to move into the measuring housing 1. At this time, the measuring base plate 112 can detect the magnetic force of the measuring magnet 11 and obtain planar data by comparing the height differences of all measuring magnets 11. The data obtained by this method is electronic measurement data, which not only increases the accuracy of the measurement, but also eliminates the need to replace the paper as in existing technologies when measurement errors occur. Simply reset the position of the measuring magnet 11 to remeasure. In addition, the dust in the pit will not cause excessive errors in the measurement results during measurement, and it can be used normally in humid environments. When the bottom of the pit has depressions or protrusions, during measurement, the caster wheel 163 will descend or rise along the depressions or protrusions, which will drive the lifting rod 16 to rise or fall. When the lifting rod 16 rises or falls, the heights of the first adjusting rod 14 and the second adjusting rod 142 remain unchanged. The lifting rod 16 will drive the adjusting unit 2 to rise or fall. When the height of the adjusting unit 2 changes, it will drive the measuring rod 15 to rise or fall. When the measuring rod 15 falls, the distance between the electromagnet 152 and the measuring magnet 11 will be closer. Since the magnetic force of the electromagnet 152 remains unchanged, when the electromagnet 152 is close to the measuring distance, the measuring magnet 11 will move further into the measuring housing 1. At this time, the measuring base plate 112 will compare the height difference of the measuring magnet 11 and mark it in the electronic measurement data when the height difference is obvious. In this way, depth data can be obtained during measurement. When measuring pits with special bottom designs, such as drainage channels, the data can be saved at the same time during measurement so as to compare whether the design is reasonable in the later stage, and to ensure that the equipment placed in the pit will not be damaged.

[0021] Specifically, a limiting shell 113 is provided between every two measuring magnets 11. The limiting shell 113 is fixedly connected to the top of the measuring shell 1. Limiting magnets 114 are fixedly connected to both sides of the measuring shell 1 near the measuring magnets 11. The limiting magnets 114 are used to limit and fix the measuring magnets 11 in the stopped state.

[0022] In this embodiment, considering that the measuring magnet 11 is located at the top of the limiting housing 113, the measuring magnet 11 may move downward due to gravity during measurement, which may cause the measuring magnet 11 to move excessively and cause measurement errors. By setting the limiting housing 113 and the limiting magnet 114, after the measuring magnet 11 moves, the position of the limiting magnet 114 can be limited by the magnetic force of the limiting magnet 114, and the measuring magnet 11 is prevented from moving on its own due to gravity or other reasons. Since the limiting magnet 114 is only used to limit and fix the measuring magnet 11, when the electromagnet 152 pushes the measuring magnet 11 to move, the limiting magnet 114 has little effect on the measuring magnet 11 and will not produce a large error.

[0023] Specifically, the adjustment unit 2 includes an adjustment block 162, an adjustment plate 22, and two adjustment fixing brackets 144. The adjustment block 162 is fixedly connected to a first rack plate 21 on the side near the detection housing 31. The adjustment plate 22 is slidably connected to the first rack plate 21. A second rack plate 221 is fixedly connected to the top surface of the adjustment plate 22 on the side near the first rack plate 21. A sliding groove 223 is provided at the end of the adjustment plate 22 near the detection housing 31. The sliding groove 223 is slidably connected to the lifting rod 16. The adjusting and fixing frame 144 is symmetrically fixed on both sides of the first adjusting rod 14. The surface of the adjusting and fixing frame 144 near the top is provided with four through holes. A first rotating shaft 231, a first fixed shaft 241, a second fixed shaft 251 and a second rotating shaft 261 are respectively arranged in the through holes from the lifting rod 16 to the detection housing 31. The first rotating shaft 231 and the second rotating shaft 261 are fixedly connected to the through holes, and the first fixed shaft 241 and the second fixed shaft 251 are rotatably connected to the through holes. A drive gear 23 is rotatably connected to the outer surface of the first rotating shaft 231. The drive gear 23 meshes with the first rack plate 21. The drive gear 23 meshes with a first large gear 24. The first large gear 24 is fixedly connected to the first fixed shaft 241. A first small gear 242 is fixedly connected to the side of the first fixed shaft 241 away from the first large gear 24. The first small gear 242 meshes with a second large gear 25. The second large gear 25 is fixedly connected to the second fixed shaft 251. A second small gear 252 is fixedly connected to the side of the second fixed shaft 251 away from the second large gear 25. The second small gear 252 meshes with a third large gear 26. The third large gear 26 is rotatably connected to the second rotating shaft 261. The third large gear 26 meshes with the second rack plate 221.

[0024] In this embodiment, it is considered that not only man-made pits will be measured, but also natural pits and caves. At the same time, it is considered that when the measured pit is large or the wall of the pit has large changes, if the scale of the measurement cannot be scaled up proportionally, it may lead to incomplete measurement data. When dealing with larger pits, the positioning block 161 and the lifting rod 16 need to move along the pit wall. This causes the second adjusting rod 142 to move outward a considerable distance. The adjusting block 162 then pulls the first rack plate 21 to move in the same direction as the second adjusting rod 142. As the first rack plate 21 moves, it drives the drive gear 23 to rotate. The drive gear 23 then drives the first large gear 24 to rotate. When the first large gear 24 rotates, it drives the first fixed shaft 241 to rotate, simultaneously driving the first small gear 242 to rotate. The first small gear 242 then drives the second large gear 25 to rotate. When the second large gear 25 rotates, it drives the second fixed shaft 251 to rotate. The first gear 24, the first pinion 242, the second gear 25, and the second pinion 26 rotate simultaneously. The second pinion 252 then drives the third gear 26 to rotate, which in turn moves the second rack plate 221. This movement of the rack plate 221, in turn, moves the adjusting plate 22. Because the first gear 24, the first pinion 242, the second gear 25, and the second pinion 252 reduce the transmission ratio and torque during rotation, deceleration is achieved. This proportionally reduces the distance the lifting rod 16 moves and the distance the measuring rod 15 moves, preventing the measuring rod 15 from deviating from the measurement area and reducing the likelihood of incomplete measurement data. When measuring the wall variations within a pit, more data can be obtained through proportionally scaled-down measurements. Furthermore, the precise dimensions can be obtained based on the scaling-down ratio during subsequent data analysis, thereby increasing the accuracy of the measurement. When the height of the lifting rod 16 changes, the adjusting block 162 will drive the first rack plate 21 to rise or fall. When the first rack plate 21 rises or falls, it will drive the adjusting plate 22 to rise or fall. At this time, the adjusting plate 22 will drive the measuring rod 15 to rise or fall. Thus, the height of the measuring rod 15 can be adjusted when there are depressions or protrusions on the ground, thereby obtaining the depth data of the pit. When the first rack plate 21 rises or falls, it will drive the adjusting fixing frame 144 to rise or fall and adapt to the height of the first rack plate 21, thereby ensuring that the drive gear 23 is always engaged with the first rack plate 21.

[0025] Specifically, a limiting plate 145 is fixedly connected to the top of the side of the first adjusting rod 14 near the second adjusting rod 142. An adjusting support rod 222 is slidably connected inside the limiting plate 145, and the top of the adjusting support rod 222 is fixedly connected to the adjusting plate 22.

[0026] In this embodiment, the limiting plate 145 and the adjusting support rod 222 can support the adjusting plate 22. When the adjusting plate 22 moves, the limiting plate 145 limits its movement to prevent the measuring rod 15 from leaving the measuring range. The adjusting support rod 222 can extend and retract when the adjusting plate 22 rises and falls, and always supports the adjusting plate 22 to increase the strength of the equipment and avoid the adjusting plate 22 from deviating from its position or breaking during use.

[0027] Specifically, the detection unit 3 includes a detection housing 31, a sliding block 32 is slidably connected inside the detection housing 31, and a rotating shaft 33 is rotatably connected to one end of the sliding block 32 away from the detection housing 31.

[0028] In this embodiment, when measuring along the wall of the pit, the positioning block 161 needs to be completely in contact with the wall to obtain the most accurate measurement data. However, when in contact with the wall, the positioning block 161 will be worn. After long-term use, the measurement accuracy may be reduced due to excessive wear. By configuring the housing 31 and the sliding block 32, the sliding block 32 can contact the wall surface and extend outward by the same distance as the wear after wear. This reduces the change in accuracy caused by wear during measurement, thus reducing the possibility of decreased accuracy of measurement data. The rotating shaft 33 can convert sliding friction into rotational friction, which can reduce the frictional force generated when moving along the axis and reduce the wear on the equipment. This can increase the service life of the equipment and reduce the cost of replacing parts.

[0029] Specifically, a slot 342 is provided inside the detection housing 31 and the positioning block 161, and a return spring 35 is fixedly connected between the detection housing 31 and the sliding block 32; a locking block 34 is fixedly connected to one end of the sliding block 32 away from the rotating shaft 33, and the locking block 34 is slidably connected to the slot 342. Both sides of the locking block 34 near the sliding block 32 are provided with energized contacts 341, and the energized contacts 341 are electrically connected to the electromagnet 152.

[0030] In this embodiment, considering that high precision and no error are required when measuring some pits, the undulation of the pit wall may cause measurement errors during the measurement. When the wall surface is uneven, the sliding block 32 will move outward under the action of the return spring 35, and keep the rotating shaft 33 in contact with the wall surface. As the position of the sliding block 32 changes, the sliding block 32 drives the locking block 34 to leave the locking slot 342. Since the energized contact 341 is electrically connected to the electromagnet 152, the energized contact 341 is no longer energized to the electromagnet 152, and the electromagnet 152 cannot push the measuring magnet 11 to move. When the locking block 34 re-enters the slot 342, the electromagnet 152 is still not energized. The electromagnet 152 can only be energized after the energizing contact 341 enters the slot 342. This can increase the accuracy of the measurement. Even if the wall is offset by a small distance, the measurement will not be able to continue. The locking block 34 needs to be fully inserted into the slot 342 before the measurement can be repeated to ensure the accuracy of the measurement and reduce the occurrence of the need to remeasure when errors occur.

[0031] Specifically, a limiting block 151 is slidably connected to the outer surface of the measuring rod 15, and the limiting block 151 is slidably connected to the first adjusting rod 14.

[0032] In this embodiment, the limiting block 151 can limit the movement of the measuring rod 15 to prevent deviation of the measuring angle and position, thereby increasing the measuring accuracy of the measuring rod 15. At the same time, it can limit the movement of the measuring rod 15 when it is raised or lowered, thus preventing the measuring rod 15 from deviating in angle during the raising or lowering process.

[0033] Specifically, a support frame 131 is slidably connected to the outer surface of the positioning rod 13, and the bottom of the support frame 131 is in contact with the ground.

[0034] In this embodiment, it is considered that the positioning rod 13 may not be able to be inserted into the ground when it encounters a hard ground, and may not be able to be completely fixed when it encounters a relatively soft ground; With the support frame 131 in place, when the positioning rod 13 encounters a hard surface, it can contact the ground through the support frame 131 to support the equipment. When encountering a soft surface, the support frame 131 can provide a larger support area, thereby increasing the stability of the support. At the same time, when the lifting rod 16 is pulled to rotate around the fixed rod 12, it can prevent the equipment from tipping over. This not only prevents damage to the equipment, but also achieves better stability and higher measurement accuracy.

[0035] When using, First, before measurement, insert the positioning rod 13 into the ground and make contact with the ground through the support plate 132. At this time, the position of the measuring housing 1 can be fixed. Then, pull the lifting rod 16 to the pit wall. At this time, the second telescopic rod will slide in the sliding groove 143 in the first telescopic rod until the lifting rod 16 contacts the pit wall. At this time, the positioning work before measurement is completed. By setting the limiting housing 113 and the limiting magnet 114, after the measuring magnet 11 moves, the position of the limiting magnet 114 can be limited by the magnetic force of the limiting magnet 114, and the measuring magnet 11 is prevented from moving on its own due to gravity or other reasons. Since the limiting magnet 114 is only used to limit and fix the measuring magnet 11, when the electromagnet 152 pushes the measuring magnet 11 to move, the limiting magnet 114 has little effect on the measuring magnet 11 and will not produce a large error.

[0036] Secondly, by setting the detection housing 31 and the sliding block 32, the sliding block 32 can contact the wall surface and extend outward by the same distance as the wear after wear, thereby reducing the change in accuracy caused by wear during measurement and reducing the possibility of reduced accuracy of measurement data; by setting the rotating shaft 33, sliding friction can be converted into rotational friction, which can reduce the friction force generated when moving along the axis and reduce the wear caused to the equipment, thereby increasing the service life of the equipment and reducing the cost of replacing parts; When the wall surface is uneven, the sliding block 32 will move outward under the action of the return spring 35, and keep the rotating shaft 33 in contact with the wall surface. As the position of the sliding block 32 changes, the sliding block 32 drives the locking block 34 to leave the locking slot 342. Since the energized contact 341 is electrically connected to the electromagnet 152, the energized contact 341 is no longer energized to the electromagnet 152, and the electromagnet 152 cannot push the measuring magnet 11 to move. When the locking block 34 re-enters the slot 342, the electromagnet 152 is still not energized. The electromagnet 152 can only be energized after the energizing contact 341 enters the slot 342. This can increase the accuracy of the measurement. Even if the wall is offset by a small distance, the measurement will not be able to continue. The locking block 34 needs to be fully inserted into the slot 342 before the measurement can be repeated to ensure the accuracy of the measurement and reduce the occurrence of the need to remeasure when errors occur.

[0037] Subsequently, during measurement, the lifting rod 16 rotates along the edge of the pit, causing the positioning block 161 to rotate around the fixed rod 12. The rotation of the positioning block 161 causes the second adjusting rod 142 and the first adjusting rod 14 to rotate as well, and the rotating ring 121 to rotate on the fixed rod 12. When the first adjusting rod 14 rotates, it causes the measuring rod 15 in the adjusting slot 141 to rotate. At this time, the measuring rod 15 is energized, and the electromagnet 152 at the bottom of the measuring rod 15 is also energized. The electromagnet 152 generates a magnetic field, and the magnetic poles at the bottom of the electromagnet 152 align with the top of the measuring magnet 11. When the magnetic poles are the same, the electromagnet 152 will repel the measuring magnet 11, causing the measuring magnet 11 to move into the measuring housing 1. At this time, the measuring base plate 112 can detect the magnetic force of the measuring magnet 11 and obtain planar data by comparing the height differences of all measuring magnets 11. The data obtained by this method is electronic measurement data, which not only increases the accuracy of the measurement, but also eliminates the need to replace the paper as in existing technologies when measurement errors occur. Simply repositioning the measuring magnet 11 is sufficient to remeasure. In addition, the dust in the pit will not cause excessive errors in the measurement results during measurement, and it can be used normally in humid environments. When the bottom of the pit has depressions or protrusions, during measurement, the caster wheel 163 will descend or rise along the depressions or protrusions, which will drive the lifting rod 16 to rise or fall. When the lifting rod 16 rises or falls, the heights of the first adjusting rod 14 and the second adjusting rod 142 remain unchanged. The lifting rod 16 will drive the adjusting unit 2 to rise or fall. When the height of the adjusting unit 2 changes, it will drive the measuring rod 15 to rise or fall. When the measuring rod 15 falls, the distance between the electromagnet 152 and the measuring magnet 11 will be closer. Since the magnetic force of the electromagnet 152 remains unchanged, when the electromagnet 152 is close to the measuring distance, the measuring magnet 11 will move further into the measuring housing 1. At this time, the measuring base plate 112 will compare the height difference of the measuring magnet 11 and mark it in the electronic measurement data when the height difference is obvious. In this way, depth data can be obtained during measurement. When measuring pits with special bottom designs, such as drainage channels, the data can be saved at the same time during measurement so as to compare whether the design is reasonable in the later stage, and to ensure that the equipment placed in the pit will not be damaged.

[0038] Finally, when dealing with larger pits, since the positioning block 161 and the lifting rod 16 need to move along the pit wall, the second adjusting rod 142 will move outward a considerable distance. At this time, the adjusting block 162 will pull the first rack plate 21 to move in the same direction as the second adjusting rod 142. When the first rack plate 21 moves, it will drive the drive gear 23 to rotate. The drive gear 23 will then drive the first large gear 24 to rotate. When the first large gear 24 rotates, it will drive the first fixed shaft 241 to rotate, and simultaneously drive the first small gear 242 to rotate. The first small gear 242 will then drive the second large gear 25 to rotate. When the second large gear 25 rotates, it will drive the second fixed shaft 241 to rotate. 51 rotates, simultaneously driving the second pinion 252 to rotate. At this time, the second pinion 252 drives the third large gear 26 to rotate. When the third large gear 26 rotates, it drives the second rack plate 221 to move. When the second rack plate 221 moves, it drives the adjusting plate 22 to move. Since the transmission ratio is reduced and the torque is reduced when the first large gear 24, the first pinion 242, the second large gear 25, and the second pinion 252 rotate, deceleration can be achieved. The distance that the lifting rod 16 moves and the distance that the measuring rod 15 moves are proportionally reduced. This can prevent the measuring rod 15 from deviating from the measuring area during measurement, thereby reducing the occurrence of incomplete measurement data. When measuring the wall variations within a pit, more data can be obtained through proportionally scaled-down measurements. Furthermore, the precise dimensions can be obtained based on the scaling-down ratio during subsequent data analysis, thereby increasing the accuracy of the measurement. When the height of the lifting rod 16 changes, the adjusting block 162 will drive the first rack plate 21 to rise or fall. When the first rack plate 21 rises or falls, it will drive the adjusting plate 22 to rise or fall. At this time, the adjusting plate 22 will drive the measuring rod 15 to rise or fall. Thus, the height of the measuring rod 15 can be adjusted when there are depressions or protrusions on the ground, thereby obtaining the depth data of the pit. When the first rack plate 21 rises or falls, it will drive the adjusting fixing frame 144 to rise or fall and adapt to the height of the first rack plate 21, thereby ensuring that the drive gear 23 is always engaged with the first rack plate 21.

[0039] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A land space planning topographic surveying device, comprising a surveying shell (1), wherein a fixing rod (12) is fixedly connected to the top of the surveying shell (1), and a positioning rod (13) is fixedly connected to the bottom of the surveying shell (1); a support plate (132) is fixedly connected to the outer surface of the positioning rod (13); Its features are: A rotating ring (121) is rotatably connected to the outer surface of the fixed rod (12). A first adjusting rod (14) is fixedly connected to the outer surface of the rotating ring (121). A sliding groove (143) is provided at the end of the first adjusting rod (14) away from the rotating ring (121). A second adjusting rod (142) is slidably connected in the sliding groove (143). A positioning block (161) is fixedly connected at the end of the second adjusting rod (14) away from the first adjusting rod (14). A detection unit (3) is fixedly connected on the side of the positioning block (161) away from the second adjusting rod (142). A lifting rod (16) is slidably connected in the positioning block (161). A universal wheel (163) is provided at the bottom of the lifting rod (16). A measuring base plate (112) is fixedly connected to the bottom surface of the measuring housing (1). A plurality of sliding holes are evenly opened on the top of the measuring housing (1). A measuring magnet (11) is slidably connected in the sliding holes. An adjusting groove (141) is opened on the side surface of the first adjusting rod (14) near the rotating ring (121). A measuring rod (15) is slidably connected in the adjusting groove (141). An electromagnet (152) is fixedly connected to the bottom of the measuring rod (15). An adjusting unit (2) is provided between the measuring rod (15) and the lifting rod (16).

2. The topographic surveying device for land spatial planning according to claim 1, characterized in that: A limiting shell (113) is provided between each pair of measuring magnets (11). The limiting shell (113) is fixedly connected to the top of the measuring shell (1). Limiting magnets (114) are fixedly connected to both sides of the measuring shell (1) near the measuring magnets (11). The limiting magnets (114) are used to limit and fix the measuring magnets (11) in the stopped state.

3. The topographic surveying device for land spatial planning according to claim 1, characterized in that: The adjustment unit (2) includes an adjustment block (162), an adjustment plate (22), and two adjustment fixing brackets (144). The adjustment block (162) is fixedly connected to a first rack plate (21) on the side near the detection housing (31). The adjustment plate (22) is slidably connected to the first rack plate (21). The top surface of the adjustment plate (22) near the first rack plate (21) is fixedly connected to a second rack plate (221). A sliding groove (223) is provided at the end of the adjustment plate (22) near the detection housing (31). The sliding groove (223) is slidably connected to the lifting rod (16). The adjusting bracket (144) is symmetrically fixed on both sides of the first adjusting rod (14). The adjusting bracket (144) has four through holes on its surface near the top. A first rotating shaft (231), a first fixed shaft (241), a second fixed shaft (251), and a second rotating shaft (261) are respectively arranged in the through holes from the lifting rod (16) to the detection housing (31). The first rotating shaft (231) and the second rotating shaft (261) are fixedly connected to the through holes, and the first fixed shaft (241) and the second fixed shaft (251) are rotatably connected to the through holes. A drive gear (23) is rotatably connected to the outer surface of the first rotating shaft (231). The drive gear (23) meshes with the first rack plate (21). The drive gear (23) meshes with a first large gear (24). The first large gear (24) is fixedly connected to the first fixed shaft (241). A first small gear (242) is fixedly connected to the side of the first fixed shaft (241) away from the first large gear (24). The first small gear (242) meshes with a second large gear (25). The second large gear (25) is fixedly connected to the second fixed shaft (251). A second small gear (252) is fixedly connected to the side of the second fixed shaft (251) away from the second large gear (25). The second small gear (252) meshes with a third large gear (26). The third large gear (26) is rotatably connected to the second rotating shaft (261). The third large gear (26) meshes with the second rack plate (221).

4. A land spatial planning topographic surveying device according to claim 3, characterized in that: The first adjusting rod (14) is fixedly connected to a limiting plate (145) on the top side near the second adjusting rod (142). An adjusting support rod (222) is slidably connected inside the limiting plate (145), and the top of the adjusting support rod (222) is fixedly connected to the adjusting plate (22).

5. A land spatial planning topographic surveying device according to claim 1, characterized in that: The detection unit (3) includes a detection housing (31), a sliding block (32) is slidably connected inside the detection housing (31), and a rotating shaft (33) is rotatably connected to one end of the sliding block (32) away from the detection housing (31).

6. A land spatial planning topographic surveying device according to claim 5, characterized in that: The detection housing (31) and the positioning block (161) are provided with a slot (342). A reset spring (35) is fixedly connected between the detection housing (31) and the sliding block (32). A locking block (34) is fixedly connected to one end of the sliding block (32) away from the rotating shaft (33). The locking block (34) is slidably connected to the slot (342). Both sides of the locking block (34) near the sliding block (32) are provided with energized contacts (341). The energized contacts (341) are electrically connected to the electromagnet (152).

7. A land spatial planning topographic surveying device according to claim 1, characterized in that: The outer surface of the measuring rod (15) is slidably connected to a limiting block (151), and the limiting block (151) is slidably connected to the first adjusting rod (14).

8. A land spatial planning topographic surveying device according to claim 1, characterized in that: The outer surface of the positioning rod (13) is slidably connected to a support frame (131), and the bottom of the support frame (131) is in contact with the ground.

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