Terrain flatness laser measurement device and method for territorial space planning

Abstract

The invention discloses a terrain flatness laser measurement device and method for territorial space planning, and the device comprises a hand-push frame, the bottom of the hand-push frame is fixedly provided with a drive plate mechanism, the left and right sides of the drive plate mechanism are provided with track mechanisms, and the two track mechanisms are disposed on the ground; and the laser measuring mechanism is used for measuring the flatness of the ground for territorial space planning, and the laser measuring mechanism is arranged at the bottom of the driving plate mechanism. According to the terrain flatness laser measurement device and method for territorial space planning, through mutual cooperation of the hand-push frame, the driving plate mechanism, the laser measurement mechanism, the cleaning mechanism and the track mechanism, in the whole measurement process, the laser measurement mechanism and the cleaning mechanism work cooperatively through the same power source, synchronous propulsion of measurement and purging is achieved, and the measurement precision is improved. The measurement efficiency is ensured, and the influence of external environmental factors on the measurement result is reduced to the maximum extent.

Description

Technical Field

[0001] This invention relates to the field of laser measurement technology, specifically to a laser measurement device and method for terrain flatness in land spatial planning. Background Technology

[0002] In land use planning, topographic flatness is a core parameter for land development, urban infrastructure, and ecological restoration, directly affecting project feasibility, cost control, and planning accuracy.

[0003] Referring to the patent application with publication number CN212109921U, a flatness measuring device for construction engineering is disclosed. The terrain of the area to be measured is imaged onto imaging paper using a laser lamp. The flatness of the terrain in the measuring area can be seen intuitively, and the flatness of the measuring area can be judged from the image to determine whether the flatness of the measuring area is qualified.

[0004] A comprehensive analysis of the above-mentioned patents reveals the following shortcomings: Existing laser measurement devices and methods for terrain flatness in land spatial planning typically use laser rangefinders to measure ground flatness. However, during the measurement process, the laser signal emitted by the laser rangefinder is easily interfered with by external strong light, high humidity, and ground debris, resulting in inaccurate measurement results. Furthermore, it is difficult to efficiently and comprehensively reflect ground flatness during the measurement. Therefore, it is necessary to provide a laser measurement device and method for terrain flatness in land spatial planning to solve the above-mentioned technical problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a laser measurement device and method for terrain flatness in land spatial planning. It solves the problem that while laser rangefinders are commonly used to measure ground flatness, the laser signals emitted by these sensors are easily interfered with by external factors such as strong light, high humidity, and ground debris, resulting in inaccurate measurement results and difficulty in efficiently and comprehensively reflecting ground flatness.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a laser measurement device for terrain flatness in land spatial planning, comprising: A push frame, wherein a drive plate mechanism is fixedly installed at the bottom of the push frame, and a track mechanism is provided on both the left and right sides of the drive plate mechanism, and both track mechanisms are placed on the ground; A laser measuring mechanism is used to measure the flatness of the ground for land use planning. The laser measuring mechanism is located at the bottom of the drive plate mechanism. A cleaning mechanism is used to pre-blow and sweep the ground to be measured. The cleaning mechanism is located at the bottom of the drive plate mechanism and in front of the laser measurement mechanism.

[0007] Preferably, the drive plate mechanism includes a top plate, with sliders fixedly installed on both the left and right sides of the top plate. A servo motor is fixedly installed on the top left side of the top plate. The output shaft of the servo motor rotatably passes through the bottom of the top plate and is fixedly installed with a vertical shaft. A large gear is fixedly sleeved at the bottom of the vertical shaft. A drive frame assembly located above the large gear is fixedly sleeved at the lower part of the vertical shaft. A support rod is rotatably installed at the end of the drive frame assembly away from the vertical shaft. A U-shaped rod is rotatably installed at the end of the support rod away from the drive frame assembly. A connecting rod is fixedly installed at the bottom of the U-shaped rod away from the support rod. Limit sleeves are fixedly installed at the front and rear parts of the bottom right side of the top plate. The U-shaped rod slides through the interior of the two limit sleeves. A protective box is sleeved on the outside of the servo motor. The bottom of the protective box is fixedly connected to the top of the top plate.

[0008] Preferably, the drive frame assembly includes an inner rod with a plurality of positioning holes evenly distributed inside the inner rod. A hollow rod is slidably fitted onto the outside of the inner rod. A bolt is threaded through the surface of the hollow rod and the inside of one of the positioning holes. One end of the inner rod is fixedly fitted onto the outside of the vertical shaft, and the end of the hollow rod away from the vertical shaft is rotatably connected to a support rod.

[0009] Preferably, the laser measuring mechanism includes a receiving box, the top center of which is fixedly connected to the bottom of a connecting rod. Several cylinders are uniformly fixedly arranged from left to right on the top of the inner cavity of the receiving box. A laser ranging sensor is fixedly arranged in the middle of the top of the inner cavity of each cylinder. A piston plate is slidably arranged between the inner walls of each cylinder. A target plate is fixedly arranged in the middle of the top of the piston plate.

[0010] Preferably, a guide rod is fixedly provided at the bottom center of the piston plate, the bottom of the guide rod slides through the bottom of the receiving box and is fixedly provided with a caster wheel, a spring is sleeved on the outside of the guide rod, a baffle plate located inside the receiving box is fixedly sleeved in the middle of the guide rod, the spring is located between the bottom of the cylinder and the top of the baffle plate, a central processing unit is fixedly provided at the bottom of the inner cavity of the receiving box, and protrusions are fixedly provided at the upper and lower parts of the front end of the receiving box.

[0011] Preferably, the cleaning mechanism includes a box body, a rotating shaft is rotatably arranged between the left and right side walls of the inner cavity of the box body, a plurality of worm gears are uniformly fixedly sleeved on the outside of the rotating shaft from left to right, a first bevel gear is fixedly sleeved on the left side of the rotating shaft, and a plurality of shafts are uniformly rotatably arranged on the top of the inner cavity of the box body from left to right, and a worm wheel is fixedly sleeved on the outside of each shaft.

[0012] Preferably, the rear part of the worm gear meshes with the front part of the corresponding worm, a fan is fixedly installed at the bottom of the shaft, a short shaft is rotatably installed on the top left side of the inner cavity of the box, a second bevel gear is fixedly installed at the bottom of the short shaft, the second bevel gear meshes with the first bevel gear, a small gear is fixedly sleeved on the upper part of the short shaft, and a medium gear is rotatably installed on the top of the inner cavity of the box and to the right of the short shaft, the right side of the small gear meshes with the left side of the medium gear.

[0013] Preferably, the lower part of the vertical shaft rotates through the top of the box body, the large gear is located inside the box body, the right side of the middle gear meshes with the left side of the large gear, the bottom of the box body is fixedly connected to a blower hood, the top of the box body is evenly provided with several air inlets, L-shaped plates are fixedly provided on both the left and right sides of the box body, the top of the L-shaped plates is fixedly connected to the bottom of the top plate, and the upper and lower parts of the rear wall of the box body are provided with sliding grooves, and the two protrusions slide in the corresponding sliding grooves respectively.

[0014] Preferably, both of the track mechanisms include a track, the front end of the track is provided with an insertion interface, the rear end of the track is fixedly provided with an insertion block adapted to the insertion interface, the bottom front and rear ends of the track are fixedly provided with support legs, and the slider is slidably sleeved on the outside of the track.

[0015] This invention also provides a method for measuring topographic flatness using laser technology in land spatial planning. The method employs a laser measurement device for topographic flatness in land spatial planning and includes the following steps: Step 1: Place the two track mechanisms on the ground for land space planning. Depending on the length of the ground to be measured, flexibly increase the number of track mechanisms on the left and right sides. Install the newly added track mechanisms at the front end of the left track mechanism and the front end of the right track mechanism respectively, so that the two adjacent track mechanisms are connected end to end. Step 2: Then push the hand-operated frame forward to start the drive plate mechanism. The drive plate mechanism, laser measurement mechanism and cleaning mechanism move forward accordingly. During the process, under the action of the drive plate mechanism, the laser measurement mechanism moves forward and also moves back and forth in the left and right directions. The bottom of the laser measurement mechanism is always in contact with the ground to perform laser measurement of the flatness of the ground. Step 3: Simultaneously, under the action of the drive plate mechanism, the cleaning mechanism blows and sweeps the ground to be measured in advance, keeping the ground clean, thereby improving the measurement accuracy of the laser measuring mechanism on the ground. Beneficial effects

[0016] This invention provides a laser measurement device and method for terrain flatness in land spatial planning. Compared with the prior art, it has the following advantages: 1. A laser measurement device and method for terrain flatness in land spatial planning, which, through the cooperation between the hand-pushing frame, the drive plate mechanism, the laser measurement mechanism, the cleaning mechanism and the track mechanism, achieves synchronous advancement of measurement and purging through the same power source during the entire measurement process, ensuring measurement efficiency and minimizing the impact of external environmental factors on the measurement results.

[0017] 2. A laser measurement device and method for terrain flatness in land spatial planning, through the cooperation of tracks, connectors, connector blocks, and drive frame components, allows connector blocks in the newly added track mechanism to be inserted into the corresponding connectors according to the length of the ground to be measured, so that adjacent track mechanisms can be spliced ​​end to end, ultimately enabling multiple track mechanisms to cover the entire measurement path. Since the drive frame component consists of an inner rod, a hollow rod, and bolts, the relative position of the hollow rod and the inner rod can be adjusted by unscrewing the bolts, thereby changing the left and right reciprocating movement amplitude of the laser measurement mechanism. With multiple sets of laser ranging sensors, it can flexibly adapt to measurement areas of different widths. Through the splicable track mechanism and the dual adjustment design of adjustable measurement width, the measurement coverage range is flexibly adjustable to adapt to measurement scenarios of different scales and widths.

[0018] 3. A laser measurement device and method for terrain flatness in land spatial planning, which utilizes the cooperation between a laser rangefinder, a target plate, casters, and springs. Since the casters are always in contact with the ground, when the ground undulates, the springs provide continuous downward elastic pressure to the piston plate through the baffle, pushing the casters to closely adhere to the ground and move up and down synchronously with the terrain undulations, ensuring that the positional changes of the target plate are completely consistent with the ground undulations. Several cylinders are evenly arranged from left to right inside the housing, and each cylinder is equipped with a laser rangefinder and a target plate, which can simultaneously collect distance data from multiple measuring points on the same vertical section. Combined with the left-right reciprocating movement of the laser measurement mechanism and the forward movement of the entire device, the measurement coverage is increased, avoiding the randomness of single-point measurements, and can efficiently and comprehensively reflect the flatness of the ground.

[0019] 4. A laser measurement device and method for terrain flatness in land spatial planning, which, through the cooperation of a housing box, a cylinder, a laser rangefinder sensor, and a target plate, effectively reduces measurement errors caused by factors such as strong light, high humidity, and ground debris, and improves the accuracy of distance measurement. The device utilizes a double-guided structure that restricts the movement direction of the laser measurement mechanism, preventing skewing or shaking during reciprocating movement. This is achieved by the laser rangefinder sensor being housed within the cylinder, which blocks external background light and rainwater, thus avoiding interference with the laser signal. The target plate is fixed to the top of the piston plate, ensuring a stable position and perpendicular alignment with the laser rangefinder sensor, guaranteeing clear and discernible laser reflection signals.

[0020] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0021] Figure 1 This is a perspective view of the present invention; Figure 2 This is an assembly drawing of the pusher frame, drive plate mechanism, laser measurement mechanism and cleaning mechanism of the present invention; Figure 3 This is an assembly cross-sectional view of the drive plate mechanism, laser measurement mechanism, and cleaning mechanism of the present invention; Figure 4 For the present invention Figure 3 A magnified view of a section at point A in the middle; Figure 5 This is an exploded view of the drive plate mechanism, laser measurement mechanism, and cleaning mechanism of the present invention; Figure 6 This is a perspective view of the drive plate mechanism of the present invention; Figure 7 This is an assembly drawing of the drive frame assembly, support rod, U-shaped rod, and limiting sleeve of the present invention; Figure 8 This is an exploded view of the drive frame assembly of the present invention; Figure 9 This is a cross-sectional perspective view of the laser measurement mechanism of the present invention; Figure 10 This is a cross-sectional perspective view of the cleaning mechanism of the present invention.

[0022] In the diagram: 1. Hand-operated frame; 2. Drive plate mechanism; 21. Top plate; 22. Slider; 23. Servo motor; 24. Vertical shaft; 25. Large gear; 26. Drive frame assembly; 261. Inner rod; 262. Positioning hole; 263. Hollow rod; 264. Bolt; 27. Support rod; 28. U-shaped rod; 29. ​​Connecting rod; 210. Limiting sleeve; 211. Protective box; 3. Laser measuring mechanism; 31. Receiving box; 32. Cylinder; 33. Laser rangefinder sensor; 34. Piston plate; 35. Target plate; 6. Guide rod; 37. Caster wheel; 38. Spring; 39. Central processing unit; 310. Protrusion; 4. Cleaning mechanism; 41. Box body; 42. Shaft; 43. Worm gear; 44. First bevel gear; 45. Shaft; 46. Worm wheel; 47. Fan; 48. Short shaft; 49. Second bevel gear; 410. Pinion; 411. Medium gear; 412. Blower cover; 413. L-shaped plate; 414. Slide groove; 5. Track mechanism; 51. Track; 52. Plug interface; 53. Plug block; 54. Support leg. Detailed Implementation

[0023] 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.

[0024] This invention provides two technical solutions: like Figure 1 The first embodiment is shown: a laser measurement device for terrain flatness in land spatial planning, comprising: The push frame 1 has a drive plate mechanism 2 fixedly installed at its bottom. The drive plate mechanism 2 has a track mechanism 5 on both its left and right sides, and both track mechanisms 5 are placed on the ground. Laser measuring mechanism 3 is used to measure the flatness of the ground for land use planning. Laser measuring mechanism 3 is located at the bottom of drive plate mechanism 2. The cleaning mechanism 4 is used to clean the ground to be measured in advance. The cleaning mechanism 4 is located at the bottom of the drive plate mechanism 2 and in front of the laser measurement mechanism 3.

[0025] Through the cooperation between the pusher 1, drive plate mechanism 2, laser measurement mechanism 3, cleaning mechanism 4 and track mechanism 5, the laser measurement mechanism 3 and cleaning mechanism 4 work together through the same power source to achieve synchronous advancement of measurement and purging during the entire measurement process. This ensures measurement efficiency and minimizes the impact of external environmental factors on the measurement results.

[0026] like Figures 2 to 10The second embodiment is shown, the main difference from the first embodiment being: a laser measurement device for terrain flatness in land spatial planning, the drive plate mechanism 2 includes a top plate 21, with sliders 22 fixedly mounted on both the left and right sides of the top plate 21, a servo motor 23 fixedly mounted on the top left side of the top plate 21, the output shaft of the servo motor 23 rotating through the bottom of the top plate 21 and fixedly mounted on a vertical shaft 24, a large gear 25 fixedly mounted on the bottom of the vertical shaft 24, a drive frame assembly 26 fixedly mounted on the lower part of the vertical shaft 24 above the large gear 25, a support rod 27 rotatably mounted on the end of the drive frame assembly 26 away from the vertical shaft 24, and a U-shaped rod 28 rotatably mounted on the end of the support rod 27 away from the drive frame assembly 26, the U-shaped rod 28 being away from the support rod 24. A connecting rod 29 is fixedly installed at one end of the bottom of the 7. Limit sleeves 210 are fixedly installed at the front and rear of the bottom right side of the top plate 21. A U-shaped rod 28 slides through the interior of the two limit sleeves 210. A protective box 211 is fitted around the outside of the servo motor 23. The bottom of the protective box 211 is fixedly connected to the top of the top plate 21. The drive frame assembly 26 includes an inner rod 261. Several positioning holes 262 are evenly opened inside the inner rod 261. A hollow rod 263 is slidably fitted around the outside of the inner rod 261. A bolt 264 is threaded through the surface of the hollow rod 263 and the interior of one of the positioning holes 262. One end of the inner rod 261 is fixedly fitted around the outside of the vertical shaft 24. The end of the hollow rod 263 away from the vertical shaft 24 is rotatably connected to the support rod 27. Next, the laser measuring mechanism 3 includes a receiving box 31. The top center of the receiving box 31 is fixedly connected to the bottom of the connecting rod 29. Several cylinders 32 are evenly fixedly arranged from left to right on the top of the inner cavity of the receiving box 31. A laser ranging sensor 33 is fixedly arranged in the center of the top of the inner cavity of each cylinder 32. A piston plate 34 is slidably arranged between the inner walls of each cylinder 32. A target plate 35 is fixedly arranged in the center of the top of the piston plate 34. A guide rod 36 is fixedly arranged in the center of the bottom of the piston plate 34. The bottom of the guide rod 36 slides through the bottom of the receiving box 31 and is fixedly equipped with a universal wheel 37. A spring 38 is sleeved on the outside of the guide rod 36. A baffle plate located inside the receiving box 31 is fixedly sleeved in the middle of the guide rod 36. The spring 38 is located in the cylinder 32. Between the bottom of the housing 31 and the top of the baffle, a central processing unit 39 is fixedly installed at the bottom of the inner cavity of the housing 31. Protrusions 310 are fixedly installed at the top and bottom of the front end of the housing 31. The cleaning mechanism 4 includes a housing 41. A rotating shaft 42 is rotatably installed between the left and right side walls of the inner cavity of the housing 41. Several worm gears 43 are evenly fixedly fitted on the outside of the rotating shaft 42 from left to right. A first bevel gear 44 is fixedly fitted on the left side of the rotating shaft 42. Several shafts 45 are evenly rotatably installed on the top of the inner cavity of the housing 41 from left to right. A worm wheel 46 is fixedly fitted on the outside of each shaft 45. The rear of the worm wheel 46 meshes with the front of the corresponding worm gear 43. A fan 47 is fixedly installed at the bottom of the shaft 45. A short shaft 48 is rotatably installed on the left side of the top of the inner cavity of the housing 41.A second bevel gear 49 is fixedly mounted at the bottom of the short shaft 48, meshing with the first bevel gear 44. A small gear 410 is fixedly mounted on the upper part of the short shaft 48. A medium gear 411 is rotatably mounted at the top of the inner cavity of the box 41, to the right of the short shaft 48. The right side of the small gear 410 meshes with the left side of the medium gear 411. The lower part of the vertical shaft 24 rotatably passes through the top of the box 41. A large gear 25 is located inside the box 41, with the right side of the medium gear 411 meshing with the left side of the large gear 25. A blower hood 412 is fixedly connected to the bottom of the box 41. The top of the box 41... The box 41 has several evenly spaced air inlets. L-shaped plates 413 are fixedly installed on both the left and right sides of the box body 41. The top of the L-shaped plates 413 is fixedly connected to the bottom of the top plate 21. Slide grooves 414 are provided on the upper and lower parts of the rear wall of the box body 41. Two protrusions 310 slide within their respective slide grooves 414. Both track mechanisms 5 include a track 51. An insertion interface 52 is provided at the front end of the track 51. A plug-in block 53, compatible with the insertion interface 52, is fixedly installed at the rear end of the track 51. Support legs 54 are fixedly installed at both the front and rear ends of the bottom of the track 51. A slider 22 is slidably fitted onto the outside of the track 51.

[0027] Through the cooperation between the track 51, the interface 52, the connector block 53, and the drive frame assembly 26, the connector block 53 in the newly added track mechanism 5 can be inserted into the corresponding interface 52 according to the length of the ground to be measured, so that adjacent track mechanisms 5 can be spliced ​​end to end, and finally multiple track mechanisms 5 can cover the entire measurement path. Since the drive frame assembly 26 is composed of an inner rod 261, a hollow rod 263, and a bolt 264, unscrewing the bolt 264 can adjust the relative position of the hollow rod 263 and the inner rod 261, thereby changing the left and right reciprocating movement amplitude of the laser measuring mechanism 3, in conjunction with multiple sets of laser ranging sensors. The device 33 can flexibly adapt to measurement areas of different widths. Through the connectable track mechanism 5 and the dual-adjustment design with adjustable measurement width, the measurement coverage is flexibly adjustable to adapt to measurement scenarios of different scales and widths. Through the cooperation between the laser rangefinder 33, target plate 35, casters 37, and springs 38, since the casters 37 are always in contact with the ground, when the ground undulates, the springs 38 provide continuous downward elastic pressure to the piston plate 34 through the baffle, pushing the casters 37 to closely adhere to the ground and move up and down synchronously with the terrain undulations, ensuring that the positional changes of the target plate 35 are completely synchronized with the ground undulations. The housing 31 contains several cylindrical bodies 32 evenly arranged from left to right. Each cylindrical body 32 is equipped with a laser rangefinder 33 and a target plate 35, which can simultaneously collect distance data from multiple measuring points on the same vertical cross-section. Combined with the left-right reciprocating movement of the laser measuring mechanism 3 and the forward movement of the entire device, the measurement coverage is increased, avoiding the randomness of single-point measurements. This allows for efficient and comprehensive reflection of ground flatness. Through the cooperation between the housing 31, cylindrical bodies 32, laser rangefinder 33, and target plate 35, and because the laser rangefinder 33 is located inside the cylindrical body 32, the cylindrical body 32 can block external background light and rainwater. This design ensures that the laser signal is not interfered with by the external environment. The target plate 35 is fixed on the top of the piston plate 34, and its position is stable and perpendicular to the laser range sensor 33, which ensures that the laser reflection signal is clearly distinguishable. This effectively reduces the measurement error caused by factors such as strong light, high humidity, and ground debris, and improves the accuracy of distance measurement. Since the U-shaped rod 28 slides through the two limit sleeves 210, and the protrusion 310 of the receiving box 31 slides in the groove 414 of the cleaning mechanism 4, the double guide structure can limit the movement direction of the laser measuring mechanism 3 and avoid deviation or shaking when moving left and right.

[0028] This invention also provides a method for measuring topographic flatness using laser technology in land spatial planning. The method employs a laser measurement device for topographic flatness in land spatial planning and includes the following steps: Step 1: Place the two track mechanisms 5 on the ground for land space planning. Depending on the length of the ground to be measured, the number of track mechanisms 5 on the left and right sides can be increased flexibly. Install the newly added track mechanisms 5 at the front end of the left track mechanism 5 and the front end of the right track mechanism 5 respectively, so that the two adjacent track mechanisms 5 are connected end to end. During the process, insert the plug block 53 of the newly added track mechanism 5 into the plug interface 52 of the rear track mechanism 5 to perform a tight splicing operation until the total length of the track covers the entire measurement path. Step 2: Push the pusher 1 to the starting end of the measurement path, then push the pusher 1 forward to start the servo motor 23 in the drive plate mechanism 2. The drive plate mechanism 2, laser measurement mechanism 3, and cleaning mechanism 4 move forward accordingly. During the process, under the action of the drive plate mechanism 2, the laser measurement mechanism 3 moves forward and also moves back and forth in the left and right directions. The bottom of the laser measurement mechanism 3 is always in contact with the ground to perform laser measurement of the flatness of the ground. During the process, the servo motor 23 drives the vertical shaft 24 to rotate at a constant speed. The vertical shaft 24 synchronously drives the drive frame assembly 26 and the large gear 25 to rotate. Adjust the drive frame in advance according to the measurement width requirements. To adjust the length of component 26, unscrew bolt 264 and adjust the position between hollow rod 263 and inner rod 261. Once the required measurement width is achieved, screw bolt 264 through the surface of hollow rod 263 and into the corresponding positioning hole 262 to lock the length of drive frame component 26. When drive frame component 26 rotates, its end drives U-shaped rod 28 to reciprocate linearly in the left and right directions under the constraint of two limit sleeves 210 via support rod 27. U-shaped rod 28 drives receiving box 31 to move synchronously via connecting rod 29. At the same time, protrusion 310 slides in slide groove 414, further restricting the movement direction of receiving box 31. During operation, the casters 37 at the bottom of the container 31 remain in contact with the ground. When the ground is uneven, the casters 37 push the piston plate 34 up and down along the inner wall of the cylinder 32 via the guide rod 36. During this process, the baffle moves up and down with the guide rod 36, and the spring 38 extends and retracts, providing continuous downward elastic pressure to the piston plate 34, ensuring that the casters 37 always remain in close contact with the ground and move synchronously with the ground's undulations. At this time, the laser rangefinder 33 inside each cylinder 32 continuously emits laser signals towards the target plate 35 below. After being reflected by the target plate 35, the laser is received again by the laser rangefinder 33, thereby achieving the observation of the top of the inner cavity of the cylinder 32. The distance between the wall and the target plate 35 is measured by the laser range sensor 33, which transmits the measured real-time distance data to the central processing unit 39. The central processing unit 39 synchronously collects, stores and analyzes the distance data transmitted by multiple laser range sensors 33. Since the distance change between the top wall of the inner cavity of the cylinder 32 and the target plate 35 is positively correlated with the height of the ground undulation, the central processing unit 39 uses the initial measurement point as the reference plane, calculates the height deviation of each measurement point relative to the reference plane, and combines the left and right reciprocating movement trajectory of the laser measuring mechanism 3 and the forward movement speed of the whole device to construct a three-dimensional terrain data model of the measurement area and output the ground flatness parameters in real time. Step 3: Simultaneously, under the action of the drive plate mechanism 2, the cleaning mechanism 4 pre-cleans the ground to be measured, keeping the ground clean and thus improving the measurement accuracy of the laser measuring mechanism 3. During the process, as the large gear 25 rotates, the medium gear 411 and the small gear 410 rotate accordingly, driving the short shaft 48 to rotate. Since the second bevel gear 49 at the bottom of the short shaft 48 meshes with the first bevel gear 44 on the left side of the rotating shaft 42, it drives the rotating shaft 42 to rotate. Since several worm gears 43 on the rotating shaft 42 mesh with corresponding worm wheels 46, from The drive shaft 45 and fan 47 rotate at high speed. When the fan 47 rotates at high speed, it draws in external air through the air inlet and blows the air out through the blower shroud 412 to sweep the ground to be measured. Since the cleaning mechanism 4 is located in front of the laser measuring mechanism 3, when the device moves forward, the cleaning mechanism 4 will sweep the area that the laser measuring mechanism 3 is about to pass through in advance, effectively removing dust, fallen leaves and other debris from the ground, avoiding the omnidirectional wheel 37 from bumping due to debris, ensuring the stability of the target plate 35 position and improving the accuracy of distance measurement.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser measurement device for terrain flatness in land spatial planning, characterized in that, include: A push frame, wherein a drive plate mechanism is fixedly installed at the bottom of the push frame, and a track mechanism is provided on both the left and right sides of the drive plate mechanism, and both track mechanisms are placed on the ground; A laser measuring mechanism is used to measure the flatness of the ground for land use planning. The laser measuring mechanism is located at the bottom of the drive plate mechanism. A cleaning mechanism is used to pre-blow and sweep the ground to be measured. The cleaning mechanism is located at the bottom of the drive plate mechanism and in front of the laser measurement mechanism.

2. The laser measurement device for terrain flatness in land spatial planning according to claim 1, characterized in that: The drive plate mechanism includes a top plate, with sliders fixedly mounted on both the left and right sides of the top plate. A servo motor is fixedly mounted on the top left side of the top plate. The output shaft of the servo motor rotates through the bottom of the top plate and is fixedly mounted on a vertical shaft. A large gear is fixedly sleeved on the bottom of the vertical shaft. A drive frame assembly located above the large gear is fixedly sleeved on the lower part of the vertical shaft. A support rod is rotatably mounted on the end of the drive frame assembly away from the vertical shaft. A U-shaped rod is rotatably mounted on the end of the support rod away from the drive frame assembly. A connecting rod is fixedly mounted on the bottom of the U-shaped rod away from the support rod. Limit sleeves are fixedly mounted on the front and rear parts of the bottom right side of the top plate. The U-shaped rod slides through the interior of the two limit sleeves. A protective box is sleeved on the outside of the servo motor. The bottom of the protective box is fixedly connected to the top of the top plate.

3. The laser measurement device for terrain flatness in land spatial planning according to claim 2, characterized in that: The drive frame assembly includes an inner rod with several positioning holes evenly distributed inside. A hollow rod is slidably fitted onto the outside of the inner rod. A bolt is threaded through the surface of the hollow rod and the inside of one of the positioning holes. One end of the inner rod is fixedly fitted onto the outside of the vertical shaft, and the end of the hollow rod away from the vertical shaft is rotatably connected to a support rod.

4. The laser measurement device for terrain flatness in land spatial planning according to claim 2, characterized in that: The laser measurement mechanism includes a receiving box, the top center of which is fixedly connected to the bottom of a connecting rod. Several cylinders are evenly fixedly arranged from left to right on the top of the inner cavity of the receiving box. A laser ranging sensor is fixedly arranged in the middle of the top of the inner cavity of each cylinder. A piston plate is slidably arranged between the inner walls of each cylinder. A target plate is fixedly arranged in the middle of the top of the piston plate.

5. A laser measurement device for terrain flatness in land spatial planning according to claim 4, characterized in that: A guide rod is fixedly installed at the bottom center of the piston plate. The bottom of the guide rod slides through the bottom of the receiving box and is fixedly equipped with a caster wheel. A spring is sleeved on the outside of the guide rod. A baffle plate located inside the receiving box is fixedly sleeved in the middle of the guide rod. The spring is located between the bottom of the cylinder and the top of the baffle plate. A central processing unit is fixedly installed at the bottom of the inner cavity of the receiving box. Protrusions are fixedly installed at the upper and lower parts of the front end of the receiving box.

6. The laser measurement device for terrain flatness in land spatial planning according to claim 5, characterized in that: The cleaning mechanism includes a box body, with a rotating shaft rotatably arranged between the left and right side walls of the inner cavity of the box body. Several worm gears are uniformly fixedly sleeved on the outside of the rotating shaft from left to right. A first bevel gear is fixedly sleeved on the left side of the rotating shaft. Several shafts are uniformly rotatably arranged on the top of the inner cavity of the box body from left to right. A worm wheel is fixedly sleeved on the outside of each shaft.

7. A laser measurement device for terrain flatness in land spatial planning according to claim 6, characterized in that: The rear part of the worm gear meshes with the front part of the corresponding worm. A fan is fixedly installed at the bottom of the shaft. A short shaft is rotatably installed on the top left side of the inner cavity of the box. A second bevel gear is fixedly installed at the bottom of the short shaft. The second bevel gear meshes with the first bevel gear. A small gear is fixedly sleeved on the upper part of the short shaft. A medium gear is rotatably installed on the top of the inner cavity of the box and to the right of the short shaft. The right side of the small gear meshes with the left side of the medium gear.

8. A laser measurement device for terrain flatness in land spatial planning according to claim 7, characterized in that: The lower part of the vertical shaft rotates through the top of the box. The large gear is located inside the box. The right side of the middle gear meshes with the left side of the large gear. The bottom of the box is fixedly connected to a blower hood. Several air inlets are evenly opened on the top of the box. L-shaped plates are fixedly installed on both the left and right sides of the box. The top of the L-shaped plates is fixedly connected to the bottom of the top plate. Slide grooves are opened on the upper and lower parts of the rear wall of the box. The two protrusions slide in the corresponding slide grooves respectively.

9. A laser measurement device for terrain flatness in land spatial planning according to claim 2, characterized in that: Both of the track mechanisms include a track, with an insertion interface at the front end of the track and a plug block adapted to the insertion interface fixedly installed at the rear end of the track. Support legs are fixedly installed at both the front and rear ends of the bottom of the track, and the slider is slidably sleeved on the outside of the track.

10. A laser measurement method for terrain flatness in land spatial planning, characterized in that: Using the laser measurement device for terrain flatness in land spatial planning as described in any one of claims 1-9, the method includes the following steps: Step 1: Place the two track mechanisms on the ground for land space planning. Depending on the length of the ground to be measured, flexibly increase the number of track mechanisms on the left and right sides. Install the newly added track mechanisms at the front end of the left track mechanism and the front end of the right track mechanism respectively, so that the two adjacent track mechanisms are connected end to end. Step 2: Then push the hand-operated frame forward to start the drive plate mechanism. The drive plate mechanism, laser measurement mechanism and cleaning mechanism move forward accordingly. During the process, under the action of the drive plate mechanism, the laser measurement mechanism moves forward and also moves back and forth in the left and right directions. The bottom of the laser measurement mechanism is always in contact with the ground to perform laser measurement of the flatness of the ground. Step 3: Simultaneously, under the action of the drive plate mechanism, the cleaning mechanism blows and sweeps the ground to be measured in advance, keeping the ground clean, thereby improving the measurement accuracy of the laser measuring mechanism on the ground.

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