Land area measuring device for territorial resource planning
By using a universal pulley and belt drum design in the land area measuring device, combined with a drive mechanism and a laser rangefinder, the problem of accuracy in measuring complex terrain and large areas of land is solved, and fast and accurate land area calculation is achieved.
Patent Information
- Application Number
- CN202511319223.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-16
- Publication Date
- 2025-10-17
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing technologies have difficulty accurately capturing key measurement points when measuring complex terrain or large areas of land, and manual operations are time-consuming and labor-intensive, affecting measurement accuracy.
The land area measuring device adopts a universal pulley installed on the base, with a belt drum and a measuring component. The driving mechanism controls the descent of the measuring component and the stretching of the belt scale to form a regular geometric shape, and combines with a laser rangefinder for precise measurement.
It realizes fast and accurate measurement of complex terrain and large areas of land, improves measurement accuracy and efficiency, and adapts to the measurement needs of areas of different shapes.
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Figure CN120800147A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of land area measurement, and particularly relates to a land area measurement device for land and resource planning. BACKGROUND
[0002] Land planning can reasonably allocate land resources in a certain area, and allocate land resources to various users according to the needs of different industries and different purposes, so as to maximize the use of land resources. In the process of land planning, various data measurements need to be performed on the land within the planning range, such as land area measurement.
[0003] For land area measurement within the planning range, a manual measurement ruler is generally laid out, and the edge is measured one by one, and a scaled-down drawing is finally drawn, and then calculation is performed according to the drawn drawing. However, the measurement process is relatively cumbersome, and a large amount of human and material resources are consumed. The existing patent CN117516348B discloses a land area measurement device for land planning, which comprises an angle correction mechanism, an adapter assembly, a middle measurement assembly and an end measurement assembly. The bottom of the middle measurement assembly and the end measurement assembly is provided with a plug-in mechanism. The top of the middle measurement assembly is provided with a first top plate, and each middle measurement assembly is provided with two adapter assemblies. The middle measurement assembly and the end measurement assembly are connected by a measurement belt. The measurement device connects one middle measurement assembly and two end measurement assemblies, and measures the length of two routes of the planning edge and the included angle relationship between the two routes through an angle disc.
[0004] However, the above-mentioned patent still has the following deficiencies: In the measurement process, if the topography of the planning land is complex, there are many winding edges or irregular shapes, etc. It may be difficult to accurately capture all the key measurement points by relying on the combination of the middle measurement assembly and the two end measurement assemblies alone. At the same time, for large-area land measurement, frequent movement and adjustment of the measurement assembly not only consumes time and effort, but also may affect the accuracy of the final measurement due to human operation errors. SUMMARY
[0005] The present application relates to the technical field of land area measurement, and particularly relates to a land area measurement device for land and resource planning.
[0006] To solve the above technical problems, the present application specifically provides the following technical solutions: The utility model provides a land area measuring device for land and resources planning, including the base, the bottom of base is uniformly installed with a plurality of universal pulleys, be provided with the belt cylinder on the base, the top of belt cylinder is provided with the mounting seat, the four all of mounting seat are equipped with the through slot, the through slot all rotationally arranged have the rotating cylinder, the inside all of rotating cylinder are connected with measuring assembly, be provided with the drive mechanism for driving measuring assembly rotation lifting on the mounting seat, the outer wall of belt cylinder is uniformly provided with a plurality of with measuring assembly corresponds and is used for fixing measuring assembly's clamping mechanism along the circumferential direction, the outer wall of belt cylinder is provided with the opening on one side, the one end of belt ruler is rolled in the belt cylinder through the roll spring, the other end passes through the opening and is sequentially wound on the outer wall of a plurality of measuring assembly and is fixed on the initial end's measuring assembly.
[0007] As a preferred scheme of the utility model, the measuring assembly comprises a screw rod, a rotating plate, a limiting sleeve shaft, a rotating shaft and a limiting roll, the screw rod is threadedly connected to the inside of the rotating cylinder, the rotating plate is fixedly connected to the bottom of the screw rod, a taper rod is coaxially fixed to the bottom of the rotating plate, the limiting sleeve shaft is movably sleeved on the outside of the screw rod, and the bottom of the limiting sleeve shaft is rotatably connected with the rotating plate; the rotating shaft is movably sleeved on the outside of the limiting sleeve shaft and is limitingly and slidably connected with the limiting sleeve shaft; the limiting roll is fixedly sleeved on the outer wall of the rotating shaft; and the belt ruler is sequentially wound on the outer wall of the corresponding rotating shaft.
[0008] As a preferred scheme of the utility model, the clamping mechanism comprises a positioning plate, two arc-shaped clamping plates and a control assembly for driving the two arc-shaped clamping plates to rotate to open or close, the two arc-shaped clamping plates are used for clamping the limiting roll, the positioning plate is fixed on the outer wall of the belt cylinder, and the control assembly is located on the positioning plate.
[0009] As a preferred scheme of the utility model, two arc-shaped limiting pieces are symmetrically arranged on the limiting roll, an annular limiting clamping hole is formed between the two arc-shaped limiting pieces and the rotating shaft, the belt ruler sequentially passes through the corresponding limiting clamping hole and is fixedly connected with the limiting roll at the initial end.
[0010] As a preferred scheme of the utility model, the control assembly comprises an electric push rod, one end of the electric push rod is fixedly provided with a positioning rod, and the other end is fixedly provided on the outer wall of the belt cylinder; a guide groove is formed in the positioning plate, two intersecting hinged rods are coaxially and rotatably connected to the positioning rod, and the two hinged rods are slidably connected with the guide groove; and the same side end portions of the two arc-shaped clamping plates are rotatably connected with the corresponding hinged rods.
[0011] As a preferred scheme of the present application, the driving mechanism is provided with multiple driving mechanisms, the driving mechanism comprises a gear ring, a gear and a driving motor, the gear ring is fixedly sleeved on the outer wall of the rotating drum; the gear is rotationally arranged on one side of the mounting seat close to the gear ring and is engaged with the gear ring; the driving motor is mounted in the mounting seat, and the output end of the driving motor is coaxially fixed with the gear.
[0012] As a preferred scheme of the present application, the top side of the mounting seat is fixedly connected with a handrail, and the handrail is provided with anti-skid lines.
[0013] As a preferred scheme of the present application, the top two sides of the rotating plate are symmetrically provided with mounting screw holes, and the interiors of the two mounting screw holes are both threadedly connected with positioning bolts.
[0014] As a preferred scheme of the present application, a supporting rod is rotationally arranged at the center of the mounting seat, the top of the supporting rod is fixedly connected with a mounting platform, and the top of the mounting platform is mounted with a laser range finder.
[0015] The present application has the following beneficial effects compared with the prior art: Through the driving mechanism, multiple measuring assemblies are sequentially moved downwards from the interior of the mounting seat to be inserted into the ground, at the same time, the clamping mechanism clamps and fixes the measuring assemblies in the process of descending, then the base is dragged, the base drives the belt ruler to stretch, and the belt ruler is tightly stretched and straightened, so that the area of the land can be accurately calculated through the stretching length of the belt ruler; When all the measuring assemblies are fixed at the adjacent bending points at the edge of the measuring area, the belt ruler is sequentially wound on the multiple measuring assemblies, so that the belt ruler wound outside the measuring assemblies can form a regular geometric shape, such as a square or a rectangle, thereby realizing accurate mapping of the measuring area, being suitable for complex terrain, and realizing rapid and accurate measurement of the area of the land. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only exemplary, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.
[0017] Figure 1 It is an overall structural schematic view of the present application; Figure 2 It is a top view structural sectional view of the mounting seat provided by the present application; Figure 3 It is a sectional view of the belt cylinder provided by the present application; Figure 4 Provides a partial structural schematic diagram of the measurement component of the present invention; Figure 5 Provides a front structural cross-sectional view of the measurement assembly of the present invention; Figure 6 A structural schematic diagram of a clamping mechanism is provided for the present invention.
[0018] The numbers in the figure represent the following: 1. Base; 2. Universal pulley; 3. Belt drum; 4. Mounting seat; 5. Through slot; 6. Rotating drum; 7. Measuring assembly; 8. Driving mechanism; 9. Clamping mechanism; 10. Belt ruler; 11. Opening; 12. Handrail; 13. Positioning bolt; 14. Support rod; 15. Mounting platform; 16. Laser rangefinder; 71. Screw; 72. Rotating plate; 73. Limit sleeve; 74. Rotating shaft; 75. Limit roll; 76. Taper rod; 78. Arc-shaped limit plate; 79. Limiting hole; 81. Gear ring; 82. Gear; 91. Arc-shaped splint; 92. Positioning plate; 93. Control assembly. DETAILED DESCRIPTION
[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0020] Example like Figures 1-6 As shown, the present invention provides a land area measuring device for national land resources planning, including a base 1, a plurality of universal pulleys 2 are evenly installed on the bottom of the base 1, a belt drum 3 is provided on the base 1, a mounting seat 4 is provided on the top of the belt drum 3, through grooves 5 are provided on all sides of the mounting seat 4, a rotating drum 6 is rotatably provided in each through groove 5, a measuring component 7 is threadedly connected in each rotating drum 6, a driving mechanism 8 for driving the measuring component 7 to rotate and lift is provided on the mounting seat 4, a plurality of clamping mechanisms 9 corresponding to the measuring components 7 and used to fix the measuring components 7 are evenly provided on the outer wall of the belt drum 3 along the circumferential direction, a belt ruler 10 is wound in the belt drum 3, an opening 11 is provided on one side of the outer wall of the belt drum 3, one end of the belt ruler 10 is wound in the belt drum 3 by a winding spring, and the other end of the belt ruler 10 passes through the opening 11 and is sequentially wound around the outer walls of the plurality of measuring components 7 and fixed on the measuring component 7 at the initial end.
[0021] In use, firstly, the overall measuring device is moved to the measuring site through the plurality of universal pulleys 2, and then the operator can start the driving mechanism 8 to drive the rotating drum 6 at the initial end to rotate, since the measuring assembly 7 is threadedly connected inside the rotating drum 6, the rotation of the rotating drum 6 drives the measuring assembly 7 to descend.
[0022] Specifically, the measuring assembly 7 comprises a screw rod 71, a rotating plate 72, a limiting sleeve shaft 73, a rotating shaft 74 and a limiting roll 75, the screw rod 71 is threadedly connected inside the rotating drum 6, the rotating plate 72 is fixedly connected to the bottom of the screw rod 71, and the bottom of the rotating plate 72 is coaxially fixedly connected with a taper rod 76, the limiting sleeve shaft 73 is movably sleeved outside the screw rod 71, and the bottom of the limiting sleeve shaft 73 is rotatably connected with the rotating plate 72, the rotating shaft 74 is movably sleeved outside the limiting sleeve shaft 73 and is limitingly and slidably connected with the limiting sleeve shaft 73, and the limiting roll 75 is fixedly sleeved on the outer wall of the rotating shaft 74; the belt scale 10 is wound on the outer wall of the corresponding rotating shaft 74 in sequence.
[0023] In the initial state, the rotating shaft 74 is fixed in position by the clamping mechanism 9, at this time, with the continuous rotation of the rotating drum 6, the screw rod 71 can move downward along the inside of the limiting sleeve shaft 73, the screw rod 71 drives the rotating plate 72 and the taper rod 76 to move downward until the taper rod 76 is stably inserted into the ground; at the same time, the position of the rotating drum 6 does not change, while the rotating shaft 74 and the limiting roll 75 outside it remain in the original position under the action of the clamping mechanism 9, the limiting sleeve shaft 73 can vertically move downward along the inside of the rotating shaft 74, at this time, the clamping mechanism 9 is loosened and the fixed state of the rotating shaft 74 is released; then the base 1 is moved to the next to-be-measured site, in the process of moving the base 1, since one end of the belt scale 10 is fixedly connected with the measuring assembly 7 at the initial end, in the process of moving the base 1, the belt scale 10 is stretched, with the continuous movement of the base 1, the belt scale 10 will be gradually unfolded, then according to the above operation, the other measuring assemblies 7 are sequentially inserted into the ground to realize the positioning of the subsequent measuring points.
[0024] In the above process, through the belt scale 10 wound on the rotating shaft 74 of the plurality of measuring assemblies 7 in sequence, when the base 1 drives the belt scale 10 to stretch, the belt scale 10 is tightly stretched and straightened, so that the area of the land can be accurately calculated by measuring the stretching length of the belt scale 10. When all the measuring assemblies 7 are fixed at the adjacent bending points at the edge of the measuring area, the belt scale 10 wound outside the measuring assembly 7 can form a regular geometric shape, such as a square or a rectangle, so as to realize the accurate surveying and mapping of the measuring area. When all the measuring assemblies 7 are stably inserted into the ground and the positioning is completed, the operator can quickly and accurately calculate the area of the measured land by reading the scale on the belt scale 10 combined with the known geometric shape. The rapid and accurate measurement of the land area is realized, which provides strong technical support for the planning and utilization of land resources.
[0025] The limiting sleeve shaft 73 and the limiting sliding connection of the rotating shaft 74 are prior art, specifically, a protrusion is arranged on the outside of the limiting sleeve shaft 73, and a groove for the sliding of the protrusion is arranged on the inner wall of the rotating shaft 74, so that the rotating plate 72 is lowered to drive the limiting sleeve shaft 73 to vertically move downwards along the inner wall of the rotating shaft 74.
[0026] The application can not only realize the length data between two measuring points, but also realize the acquisition of the length data between multiple measuring points and the angle data between multiple measuring lines, and can adapt to the measurement of different shapes of the to-be-measured region, further improving the flexibility and application range of the measurement.
[0027] The rotating cone rod 76 is inserted into the ground, which not only realizes the stable positioning of the measuring point, but also avoids the measurement error caused by the uneven hardness of the ground in the traditional measurement method. At the same time, the cone rod 76 can make the measuring point deep into the ground surface, effectively reducing the influence of the ground attachments on the measurement result, and further improving the accuracy of the measurement. The clamping mechanism 9 can keep the height position of the rotating shaft 74 unchanged, so that the height of the belt scale 10 is always located at the same position, avoiding the problem that the height difference caused by the movement of the belt scale 10 due to the lifting of the measuring assembly 7 affects the measurement data.
[0028] Further, the cooperation of the clamping mechanism 9 and the limiting roll 75 can realize the quick fixing and releasing of the measuring assembly 7, ensuring the stability and accuracy of the belt scale 10 during the lifting of the screw rod 71, and improving the precision and measurement efficiency of the land area measurement. The sequential winding and tensioning and straightening mode of the belt scale 10 can ensure the accuracy and reliability of the measurement data.
[0029] Further, two arc-shaped limiting pieces 78 are symmetrically arranged on the limiting roll 75, and an annular limiting clamping hole 79 is formed between the two arc-shaped limiting pieces 78 and the rotating shaft 74, the belt scale 10 sequentially passes through the corresponding limiting clamping hole 79, and one end of the belt scale 10 is fixedly connected with the limiting roll 75 at the initial end.
[0030] Exemplarily, in addition to the limiting roll 75 at the initial end, the arc-shaped limiting pieces 78 are arranged on the remaining limiting rolls 75, and the belt scale 10 sequentially passes through the limiting clamping hole 79 between the two arc-shaped limiting pieces 78 during the stretching process. Therefore, the belt scale 10 will be limited in the limiting clamping hole 79 when stretched, thereby ensuring the stability and accuracy of the belt scale 10 during the stretching process. This design effectively avoids the possible deviation or distortion of the belt scale 10 during the stretching process, further improving the measurement accuracy. At the same time, this structure of the limiting roll 75 also facilitates the quick recovery and arrangement of the belt scale 10 after the measurement is completed, improving the practicability and convenience of the overall measuring device.
[0031] Specifically, the clamping mechanism 9 comprises a positioning plate 92, two arc-shaped clamping plates 91 and a control assembly 93 for driving the two arc-shaped clamping plates 91 to rotate to open or close, the two arc-shaped clamping plates 91 are symmetrically arranged about the limiting roll 75 and used for clamping the limiting roll 75; the positioning plate 92 is fixed on the outer wall of the belt cylinder 3, the positioning plate 92 is provided with a guide groove, and the control assembly 93 is located on the positioning plate 92.
[0032] The control assembly 93 can comprise an electric push rod, one end of the electric push rod is fixedly provided with a positioning rod, and the other end is fixedly provided on the outer wall of the belt cylinder 3; the positioning rod is coaxially and rotatably connected (hinged) with two crossed hinged rods, the two hinged rods are slidably connected with the guide groove; and the same side end portions of the two arc-shaped clamping plates 91 are rotatably connected (hinged) with the corresponding hinged rods. The electric push rod drives the positioning rod to move, thereby driving one end of the two hinged rods to move along the two ends of the guide groove, so as to drive the two arc-shaped clamping plates 91 to synchronously rotate to open or close. Of course, the specific structure of the control assembly 93 can also be designed according to actual needs, as long as the above functions can be realized.
[0033] In the initial state, the two arc-shaped clamping plates 91 are in a closed state to clamp and fix the limiting roll 75 outside the rotating shaft 74. When it is needed to release the rotating shaft 74, the control assembly 93 is used to drive the two arc-shaped clamping plates 91 to move along the guide groove on the positioning plate 92 and to rotate to open after the movement, so as to release the fixing state of the rotating shaft 74. The design of the clamping mechanism 9 not only has a simple structure and is convenient to operate, but also can effectively quickly fix and release the measuring assembly 7, so as to ensure the stability of the position of the tape measure 10 in the lifting process of the screw rod 71.
[0034] Specifically, the driving mechanism 8 is provided in plurality, the driving mechanism 8 comprises a gear ring 81, a gear 82 and a driving motor, the gear ring 81 is fixedly sleeved on the outer wall of the rotating drum 6, the gear 82 is rotatably arranged in the installation seat 4 and close to one side of the gear ring 81, and the gear 82 is engaged with the gear ring 81, and the driving motor is installed in the installation seat 4, and the output end of the driving motor is fixedly connected with the gear 82 in a same shaft.
[0035] After the driving motor is started, the gear 82 and the gear ring 81 are engaged to drive the rotating drum 6 to rotate, so as to realize the accurate control of the lifting speed of the measuring assembly 7, and further improve the measurement accuracy and flexibility.
[0036] In addition, one side of the top of the installation seat 4 can be fixedly connected with a handrail 12, the handrail 12 is provided with anti-skid lines, so as to facilitate an operator to hold and move the whole measuring device, and the anti-skid lines can increase the friction force when the operator holds, thereby improving the safety and stability of operation.
[0037] The top two sides of the rotating plate 72 can be symmetrically provided with mounting screw holes, and the interiors of the two mounting screw holes are both threadedly connected with positioning bolts 13. By rotating and inserting the positioning bolts 13 into the ground, the auxiliary positioning of the rotating plate 72 can be realized, the inclination of the measuring assembly 7 is avoided, and thus the accuracy and stability of the measurement are ensured.
[0038] A supporting rod 14 is rotatably arranged at the center of the mounting seat 4, the top of the supporting rod 14 is fixedly connected with a mounting platform 15, and the top of the mounting platform 15 is mounted with a laser range finder 16. The straight-line distance between multiple measuring points can be accurately measured by the laser range finder 16, and the accuracy of the measurement is further improved.
[0039] The scope of protection of the application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the application within the spirit and protection scope of the application, and such modifications or equivalent replacements shall also be considered to fall within the protection scope of the application.
Claims
1. A land area measuring device for land resources planning, comprising a base (1), a plurality of universal pulleys (2) evenly mounted on the bottom of the base (1), characterized in that: A belt drum (3) is provided on the base (1), a mounting seat (4) is provided on the top of the belt drum (3), through grooves (5) are provided on all sides of the mounting seat (4), a rotating drum (6) is rotatably provided in the through grooves (5), a measuring assembly (7) is threadedly connected in the rotating drum (6), a driving mechanism (8) for driving the measuring assembly (7) to rotate and lift is provided on the mounting seat (4), a plurality of clamping mechanisms (9) corresponding to the measuring assembly (7) and used to fix the measuring assembly (7) are evenly provided on the outer wall of the belt drum (3) along the circumferential direction, a belt ruler (10) is wound in the belt drum (3), and an opening (11) is provided on one side of the outer wall of the belt drum (3); one end of the belt ruler (10) is wound in the belt drum (3) by a winding spring, and the other end passes through the opening (11) and is sequentially wound on the outer walls of the plurality of measuring assemblies (7) and fixed on the measuring assembly (7) at the initial end.
2. The land area measuring device for land resources planning according to claim 1, characterized in that: The measuring assembly (7) comprises a screw (71), a rotating plate (72), a limiting sleeve (73), a rotating shaft (74) and a limiting roll (75), wherein the screw (71) is threadedly connected to the inside of the rotating drum (6), the rotating plate (72) is fixedly connected to the bottom of the screw (71), and a tapered rod (76) is coaxially fixed to the bottom of the rotating plate (72), the limiting sleeve (73) is movably sleeved on the outside of the screw (71), and the bottom of the limiting sleeve (73) is rotatably connected to the rotating plate (72); the rotating shaft (74) is movably sleeved on the outside of the limiting sleeve (73) and is limitedly slidably connected to the limiting sleeve (73); the limiting roll (75) is fixedly sleeved on the outer wall of the rotating shaft (74); and the belt ruler (10) is sequentially wound around the outer walls of the corresponding rotating shafts (74).
3. The land area measuring device for land resources planning according to claim 2, characterized in that: The clamping mechanism (9) includes a positioning plate (92), two arc-shaped clamping plates (91), and a control component (93) for driving the two arc-shaped clamping plates (91) to rotate open or close, the two arc-shaped clamping plates (91) are used to clamp the limiting roll (75), the positioning plate (92) is fixed on the outer wall of the belt drum (3), and the control component (93) is located on the positioning plate (92).
4. The land area measuring device for land resources planning according to claim 3, characterized in that: Two arc-shaped limiting pieces (78) are symmetrically arranged on the limiting roll (75), and an annular limiting clamping hole (79) is formed between the two arc-shaped limiting pieces (78) and the rotating shaft (74). One end of the belt ruler (10) passes through the corresponding limiting clamping hole (79) in sequence and is fixedly connected to the limiting roll (75) at the initial end.
5. The land area measuring device for land resources planning according to claim 3, characterized in that: The control assembly (93) includes an electric push rod, one end of which is fixed with a positioning rod, and the other end is fixed to the outer wall of the belt drum (3); a guide groove is provided on the positioning plate (92), and two cross hinge rods are coaxially connected to the positioning rod, and the two hinge rods are both slidably connected to the guide groove; the same side ends of the two arc-shaped clamping plates (91) are both rotatably connected to the corresponding hinge rod.
6. The land area measurement device for land resources planning according to claim 1, characterized in that: The driving mechanism (8) is provided with a plurality of gear rings (8), the driving mechanism (8) comprising a gear ring (81), a gear (82) and a driving motor, the gear ring (81) being fixedly sleeved on the outer wall of the rotating drum (6); the gear (82) being rotatably provided on a side of the mounting seat (4) close to the gear ring (81) and meshing with the gear ring (81); the driving motor being installed in the mounting seat (4), the output end of the driving motor being coaxially fixed with the gear (82).
7. The land area measurement device for land resources planning according to claim 1, characterized in that: A handrail (12) is fixedly connected to one side of the top of the mounting seat (4), and the handrail (12) is provided with anti-slip grooves.
8. The land area measurement device for land resources planning according to claim 2, characterized in that: Mounting screw holes are symmetrically provided on both sides of the top of the rotating plate (72), and positioning bolts (13) are threadedly connected to the interiors of the two mounting screw holes.
9. The land area measurement device for land resources planning according to claim 1, characterized in that: A support rod (14) is rotatably provided at the center of the mounting seat (4), a mounting platform (15) is fixedly connected to the top of the support rod (14), and a laser rangefinder (16) is installed on the top of the mounting platform (15).
Citation Information
Patent Citations
A land planning area measuring device
CN117516348B