An engineering surveying device based on remote sensing surveying technology

Abstract

The application provides an engineering surveying and mapping device based on remote sensing surveying and mapping technology, and relates to the technical field of surveying and mapping unmanned aerial vehicles.The device comprises an unmanned aerial vehicle body, the upper end of the unmanned aerial vehicle body is detachably provided with a storage battery, the storage battery is a lithium battery, the bottom of the unmanned aerial vehicle body is provided with a support and a detection probe, the side of the unmanned aerial vehicle body is provided with a flight part, the flight part comprises a motor-driven rotating propeller, the upper end of the flight part is provided with a cutting part, and the cutting part can cut a kite string on a cable.The cutting part is arranged at the upper end of the flight part, a plurality of differential rotating annular saw blades form a cutting force, and the kite string on the cable can be quickly cut off.The saw teeth of the annular saw blade have sharp edges, and the differential rotation can firmly clamp the string and efficiently cut the string, so that the unmanned aerial vehicle is prevented from losing control, crashing or interrupting surveying and mapping due to the winding of the string around the flight part.

Description

Technical Field

[0001] This invention relates to the field of surveying drone technology, and in particular to an engineering surveying device based on remote sensing surveying technology. Background Technology

[0002] In the field of engineering surveying, drones based on remote sensing mapping technology have become core equipment for topographic surveying, engineering planning, and other operations due to their advantages of flexibility, maneuverability, and efficient data acquisition. Existing remote sensing mapping drones typically include core components such as the drone body, battery, support frame, detection probe, and flight unit. The drone body serves as the supporting foundation, with a lithium battery at the top providing power. The support frame at the bottom provides support for takeoff and landing. The detection probe is responsible for collecting geographic remote sensing data, and the flight unit on the side uses a motor to drive the propeller to achieve takeoff and flight. These drones can be widely used in surveying operations in various engineering scenarios, including urban areas, suburbs, and industrial zones.

[0003] In actual operations, when drones fly in areas with dense cable networks (such as around urban power transmission lines or in suburban agricultural cable distribution areas), they are highly susceptible to encountering obstacles such as kite strings and abandoned cables tangled in the cables. These strings are soft and strong, and once they come into contact with the high-speed rotating propeller, they can easily become entangled in the motor or propeller of the flight unit, causing the propeller to jam, the motor to overload and be damaged, and ultimately leading to safety accidents such as drone loss of control and crashes. Furthermore, entanglement can directly interrupt remote sensing mapping operations, not only increasing equipment maintenance costs but also affecting project progress due to the interruption of survey data acquisition, and may even lead to missing data in the surveyed area, affecting the accuracy of subsequent project planning. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an engineering surveying device based on remote sensing mapping technology.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an engineering surveying device based on remote sensing mapping technology, comprising a UAV body with a centrally supported structure. A lithium battery is detachably mounted on the upper surface of the UAV body along the vertical direction to provide power to the entire device. A bracket and a detection probe are mounted on the lower surface of the UAV body extending vertically downwards. The bracket is symmetrically distributed on both sides of the detection probe for support during UAV takeoff and landing. The detection probe is located at the center of the lower surface of the UAV body and is used for remote sensing mapping of engineering geographic information. At least three flight sections are arranged radially outwards on the circumferential side of the UAV body. Each flight section has a built-in drive motor. The output shaft of the drive motor extends radially outwards along the flight section, and a propeller is coaxially fixed at the end of the output shaft. The drive motor drives the propeller to rotate, providing lift for the UAV. A cutting part is installed on the upper surface of the flight unit in a horizontal direction. The cutting end of the cutting part is set to face the outside of the drone, which can cut the kite line hanging on the cable during the flight of the drone, so as to avoid the line getting tangled in the flight unit and affecting flight safety.

[0006] Preferably, the cutting part includes a blade part, which is composed of multiple annular saw blades. Each annular saw blade is coaxially arranged on the upper end of the flight part in the vertical direction, and each annular saw blade can rotate relative to the flight part around its own axis. The multiple ring-shaped saw blades rotate at different speeds, and the combination of different speeds creates a cutting force, which can efficiently cut the kite string hanging on the cable.

[0007] Preferably, each annular saw blade of the blade section is an annular plate structure. A drive ring is fixedly fixed to the inner ring end of the annular saw blade along the axial direction. The drive ring is coaxially arranged with the annular saw blade. An annular groove is formed circumferentially in the middle of the annular body of the saw blade. This annular groove is coaxially arranged with the annular saw blade. A limiting part passes through the annular groove. The annular saw blade achieves stable rotation around its own axis through the cooperation of the annular groove and the limiting part. The side of the drone body is fixedly connected to a drive motor in the horizontal direction by a fixing plate. The output shaft of the drive motor is set towards the drive ring of the annular saw blade, and a drive unit is assembled at the end of the output shaft. The free end of the drive unit is pressed against the outer peripheral wall of the drive ring. The drive motor drives the drive unit to rotate, thereby driving the annular saw blade to rotate to achieve the cutting action.

[0008] Preferably, the drive unit includes a rotating shaft, which is coaxially fixed to the output shaft end of the drive motor in the horizontal direction. The axis of the rotating shaft is perpendicular to the axis of the annular saw blade. A center plate is fixedly sleeved on the surface of the rotating shaft along the axial direction. A first movable plate and a second movable plate are respectively provided on the upper and lower sides of the center plate. Both the first and second movable plates are sleeved on the surface of the rotating shaft and can slide freely along the axial direction of the rotating shaft. Spring strips are fixedly connected between the first movable plate and the center plate, and between the second movable plate and the center plate. The spring strips are evenly distributed along the circumference of the rotating shaft. Nuts are provided at both ends of the rotating shaft. The nuts are threaded into the rotating shaft. By rotating the nuts, the first and second movable plates can be pressed along the axial direction of the rotating shaft, causing the movable plates to slide towards the center plate and press the spring strips. Different ring saw blades correspond to different drive ring diameters. The spring bar undergoes elastic deformation under compression, and its free end is tightly pressed against the outer peripheral wall of the corresponding drive ring. When the drive motor drives the rotating shaft to rotate, the ring saw blades of different diameters are driven to rotate through the friction between the spring bar and the drive ring, and the difference in drive ring diameter creates a speed difference.

[0009] Preferably, the outer peripheral wall of the annular saw blade is uniformly provided with saw teeth along the circumferential direction, and the cutting edge of the saw teeth is inclined towards the direction of rotation. During the differential rotation of multiple annular saw blades, the saw teeth can clamp the kite string from different directions and cut the string with the cutting force of the cutting edge.

[0010] Preferably, multiple elastic bars are provided, and they are evenly distributed circumferentially along the axis of rotation between the center plate and the first movable plate, and between the center plate and the second movable plate. Each spring is curved, with its curvature pointing outwards away from the axis of rotation, ensuring that the free end of the spring can fit tightly against the outer peripheral wall of the drive ring, thus guaranteeing the stability of power transmission.

[0011] Preferably, the limiting part includes a central shaft, which is fixed vertically at the center of the upper end face of the flight unit. The axis of the central shaft coincides with the axis of the annular saw blade. Multiple isolation parts are axially spaced on the surface of the central shaft, each isolation part located between two adjacent annular saw blades, used to separate the multiple annular saw blades vertically to prevent interference during rotation. The upper outer peripheral wall of the central shaft is provided with external threads, and a clamping plate is screwed onto the upper end of the central shaft via the threaded engagement. The lower end face of the clamping plate abuts against the upper end face of the uppermost annular saw blade, achieving axial limiting of the annular saw blade. The central shaft passes vertically through the annular grooves of each ring saw blade, and the annular grooves are in clearance fit with the central shaft to provide space for the rotation of the ring saw blades.

[0012] Preferably, the isolation part consists of a first clamping plate and a second clamping plate. The second clamping plate is fixedly sleeved on the surface of the central shaft in the horizontal direction, and the first clamping plate is movably sleeved on the central shaft and can slide along the central shaft axis. The first clamp plate and the second clamp plate are arranged opposite to each other, forming an installation space between them. The roller is installed in the installation space and rotates within it. The first clamp plate and the second clamp plate are detachably connected to facilitate the installation and replacement of the roller.

[0013] Preferably, the end face of the first clamping plate facing the second clamping plate and the end face of the second clamping plate facing the first clamping plate are both provided with semi-circular rotating grooves. The two rotating grooves are spliced ​​together to form a circular groove. When the first clamping plate and the second clamping plate are fixedly installed close to each other, the roller is precisely embedded in the spliced ​​rotating groove, and the two ends of the roller are respectively rotatably engaged with the inner walls of the two rotating grooves, allowing it to rotate freely around its own axis. The outer peripheral wall of the roller makes rolling contact with the inner wall of the annular groove of the ring saw blade. The rolling of the roller reduces the friction when the ring saw blade rotates, allowing the ring saw blade to rotate smoothly.

[0014] Preferably, the second clamping plate has a square groove on its end face facing the first clamping plate. The square groove extends vertically through the upper and lower end faces of the second clamping plate. An installation block is fixed to the upper end face of the first clamping plate, and the shape of the installation block is adapted to the square groove. When the first and second clamping plates are assembled, the installation block can be inserted vertically into the square groove. The upper end face of the installation block has a cross groove extending vertically through the lower end face of the installation block. The pin has a conical structure and is screwed vertically into the cross groove. As the pin is screwed into the cross groove, the conical pin will expand the cross groove in all directions, so that the side wall of the installation block is tightly against the inner wall of the square groove, thereby firmly fixing the first and second clamping plates.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are as follows: 1. In this invention, by setting a cutting section at the upper end of the flight unit, multiple differentially rotating annular saw blades are used to generate a cutting force, which can quickly cut the kite string hanging on the cable. The saw teeth of the annular saw blades have sharp cutting edges, which, together with the differential rotation, can firmly clamp the string and cut it efficiently, avoiding the string from getting tangled in the flight unit, causing the UAV to lose control, crash, or interrupt surveying.

[0016] 2. In this invention, the drive unit adapts to drive rings of different diameters via a spring clip. The spring clip is clamped by a nut pressing against a movable plate. This eliminates the need for a separate drive motor for each ring-shaped saw blade; a single drive motor can drive multiple saw blades to rotate at different speeds. The curved, outward-arched design of the spring clip ensures a tight fit with the drive ring, resulting in stable power transmission. It also simplifies the device structure, reduces energy consumption, and, combined with a removable lithium battery, further enhances the drone's endurance, making it suitable for long-duration engineering surveying needs.

[0017] 3. In this invention, the limiting part achieves axial positioning of the annular saw blade through the central shaft, the isolation part, and the clamping plate. The roller of the isolation part makes rolling contact with the annular groove of the annular saw blade, greatly reducing rotational friction resistance and making the rotation of the annular saw blade smoother, avoiding jamming that affects the cutting effect. The first clamping plate and the second clamping plate are connected by a pin-tightening detachable connection, which facilitates the installation, replacement, and maintenance of the roller. At the same time, the annular saw blade, the battery, and other components are all designed to be detachable, reducing the maintenance difficulty and operating cost of the device and extending its overall service life.

[0018] 4. This invention organically combines remote sensing mapping technology with rope cutting functionality. The detection probe continuously collects geographical information such as terrain and landforms of the engineering area during the drone's flight, while the cutting unit simultaneously addresses aerial rope obstacles, clearing obstacles without interrupting the surveying operation. The surveying data is transmitted and corrected in real time, ensuring accuracy and completeness, avoiding omissions in the surveying area or data deviations caused by obstacles. This achieves a collaborative operation mode of simultaneous surveying and obstacle clearing, significantly improving the overall efficiency of engineering surveying. Attached Figure Description

[0019] Figure 1 This invention presents a three-dimensional structural schematic diagram of an engineering surveying device based on remote sensing mapping technology; Figure 2 This invention provides a schematic diagram of the cutting section of an engineering surveying device based on remote sensing mapping technology; Figure 3 This invention provides a partial schematic diagram of the blade section in an engineering surveying device based on remote sensing mapping technology; Figure 4 This invention provides a partial schematic diagram of a limiting part in an engineering surveying device based on remote sensing mapping technology; Figure 5 This invention proposes an engineering surveying device based on remote sensing mapping technology. Figure 5 Disassembly diagram; Figure 6 This invention presents a schematic diagram of the drive unit in an engineering surveying device based on remote sensing mapping technology.

[0020] Legend: 1. UAV body; 2. Battery; 3. Bracket; 4. Detection probe; 5. Flight section; 6. Cutting section; 61. Fixing plate; 62. Drive motor; 63. Drive section; 631. Rotating shaft; 632. First movable plate; 633. Center plate; 634. Second movable plate; 635. Spring bar; 636. Nut; 64. Blade; 641. Ring saw blade; 642. Annular groove; 643. Drive ring; 65. Limiting section; 651. Central shaft; 652. Pressure plate; 653. First clamping plate; 654. Second clamping plate; 655. Roller; 656. Rotating groove; 657. Square groove; 658. Mounting block; 659. Pin. Detailed Implementation

[0021] Example 1, such as Figure 1-6As shown, an engineering surveying device based on remote sensing mapping technology uses a drone body 1 as its core supporting structure. The upper surface of the drone body 1 has a pre-reserved installation interface adapted to a battery 2. The battery 2 is detachably connected to the drone body 1 through this interface, facilitating subsequent charging or quick replacement. Supports 3 are installed on the bottom of the drone body 1 on both sides. A detection probe 4 is fixed in the center area of ​​the bottom of the drone body 1. The mounting height of the supports 3 is higher than the detection end of the detection probe 4, allowing it to directly contact the ground during drone takeoff and landing, preventing the detection probe 4 from being impacted or worn. Three flight sections 5 extend from the circumferential sides of the drone body 1 in a uniformly distributed direction. The connection points between each flight section 5 and the drone body 1 are reinforced to ensure structural stability during flight. The drive motor 62 inside each flight section 5 works in conjunction with the propeller, generating lift after startup and propelling the drone into the air smoothly. A cutting section 6 is fixedly installed on the upper surface of the flight section 5, positioned close to the outer end of the flight section 5, allowing the cutting section 6 to preferentially contact any kite lines that may become entangled during drone flight.

[0022] The cutting section 6's blade section 64 is composed of multiple annular saw blades 641, which are coaxially arranged in the vertical direction. A certain distance is maintained between adjacent annular saw blades 641 to prevent mutual friction or collision during rotation. The inner ring of each annular saw blade 641 extends outward to form a drive ring 643. The drive ring 643 and the annular saw blade 641 are an integral structure. The outer peripheral wall of the drive ring 643 is treated to increase surface friction, ensuring effective power transmission when in contact with the drive section 63. An annular groove 642 is formed around the center of the annular saw blade 641. The width of the annular groove 642 matches the fitting structure of the limiting section 65, providing space for the installation and function of the limiting section 65. A fixing plate 61 is fixed to the side of the UAV body 1. The extension direction of the fixing plate 61 is towards the flight part 5. The drive motor 62 is mounted on the fixing plate 61 by a fastening structure. The output shaft of the drive motor 62 is aligned with the drive ring 643 of the annular saw blade 641. The drive part 63 at the end of the output shaft is tightly fitted with the outer peripheral wall of the drive ring 643 to form a stable power transmission contact.

[0023] The drive unit 63's rotating shaft 631 is coaxially fixed with the output shaft of the drive motor 62. A center plate 633 is fixedly sleeved at the middle of the rotating shaft 631. The diameter of the center plate 633 is larger than the diameter of the rotating shaft 631, serving to limit and support the elastic strips 635. The first movable plate 632 and the second movable plate 634 are respectively sleeved on the rotating shaft 631 on the upper and lower sides of the center plate 633. The inner hole of the movable plate fits against the outer peripheral wall of the rotating shaft 631, ensuring smooth sliding along the axial direction of the rotating shaft 631. Multiple elastic strips 635 are evenly distributed circumferentially between the first movable plate 632 and the center plate 633, and between the second movable plate 634 and the center plate 633. The two ends of the elastic strips 635 are fixedly connected to the movable plate and the center plate 633 respectively. In their natural state, the elastic strips 635 have an outwardly arched curved shape, possessing good elastic recovery capability. Nuts 636 are provided at both ends of the rotating shaft 631. The nuts 636 are engaged with the threaded structure of the rotating shaft 631. When the nuts 636 are rotated, they move slowly along the axial direction of the rotating shaft 631, gradually pressing the corresponding first movable plate 632 or second movable plate 634, causing the movable plate to slide towards the center plate 633, thereby pressing the spring strip 635 to undergo elastic deformation. Under the action of deformation, the free end of the spring strip 635 tightly abuts against the outer peripheral wall of the drive ring 643. The drive rings 643 corresponding to different ring-shaped saw blades 641 have different diameters. The spring strip 635 adapts to the drive rings 643 of different diameters through its own elastic deformation, ensuring that each drive ring 643 can form effective contact with the spring strip 635 to achieve power transmission.

[0024] The outer circumferential wall of the ring saw 641 is evenly distributed with serrations. The cutting edges of the serrations are specially treated to have strong cutting ability. The orientation of the cutting edges is consistent with the rotation direction of the ring saw 641, so that the cutting edges can quickly cut into the kite line during cutting. Multiple ring saws 641 rotate synchronously under the drive of the drive unit 63. Due to the different diameters of the drive rings 643, the rotation speeds of the different ring saws 641 vary, creating a differential rotation effect. This differential speed coordination can firmly clamp the kite line, while the cutting force of the serrations quickly cuts the line.

[0025] The central shaft 651 of the limiting part 65 is vertically fixed at the center of the upper end face of the flying part 5. The axis of the central shaft 651 is completely coincident with the axis of the ring saw blade 641, ensuring that the ring saw blade 641 can rotate stably around the central shaft 651. Multiple isolation parts are provided axially along the surface of the central shaft 651. Each isolation part corresponds to the position between two adjacent ring saw blades 641, which serves to separate the ring saw blades 641 and prevent mutual interference during rotation. The isolation part consists of a first clamping plate 653 and a second clamping plate 654. The second clamping plate 654 is fixed on the central shaft 651, and the first clamping plate 653 is sleeved on the central shaft 651 and can move along the central shaft 651 axially. Semi-circular rotating grooves 656 are opened on the opposite end faces of both. The two rotating grooves 656 are spliced ​​together to form a circular space. The roller 655 is placed in the circular space and can rotate freely around its own axis. The second clamping plate 654 has a square groove 657 that runs through the upper and lower end faces. The upper end of the first clamping plate 653 extends into a mounting block 658. The shape of the mounting block 658 is adapted to the square groove 657. During assembly, the mounting block 658 is inserted into the square groove 657. The cross groove on the mounting block 658 cooperates with the conical pin 659. When the pin 659 is screwed into the cross groove, the conical structure of the pin 659 expands the mounting block 658 in all directions, so that the side wall of the mounting block 658 fits tightly against the inner wall of the square groove 657, thereby firmly fixing the first clamping plate 653 and the second clamping plate 654. The roller 655 is stably clamped between the two rotating grooves 656. The upper end of the central shaft 651 is provided with a threaded structure. The clamping plate 652 is screwed onto the upper end of the central shaft 651 through the threaded engagement. The lower end face of the clamping plate 652 abuts against the upper end face of the uppermost annular saw blade 641, restricting the axial movement of the annular saw blade 641 and ensuring that the annular saw blade 641 can only rotate around the central shaft 651. The central shaft 651 passes through the annular grooves 642 of each annular saw blade 641. The inner wall of the annular groove 642 forms a rolling contact with the outer peripheral wall of the roller 655. When the annular saw blade 641 rotates, the roller 655 rotates synchronously, effectively reducing the frictional resistance encountered by the annular saw blade 641 during rotation and ensuring smooth rotation.

[0026] The working principle involves first precisely assembling all components of the device. Based on the actual dimensions of each ring saw blade 641 and drive ring 643, the nuts 636 at both ends of the rotating shaft 631 are rotated, squeezing the first movable plate 632 and the second movable plate 634 to ensure the elastic bar 635 is tightly pressed against the outer circumferential wall of the drive ring 643, guaranteeing stable power transmission. Simultaneously, the remote sensing mapping parameters are preset through the UAV control system, including the mapping range, data acquisition accuracy, flight path, and altitude, and the remote sensing detection frequency and data transmission protocol of the detection probe 4 are defined. After the UAV is started, the battery 2 powers the entire device. The built-in drive motor 62 in the flight unit 5 drives the propeller to rotate, generating lift. The UAV flies smoothly along the preset path. During this process, the remote sensing mapping technology is simultaneously activated. The detection probe 4, as the core remote sensing component, captures geographical information of the engineering area below through its built-in remote sensing sensor, including data on terrain undulations, landform features, and the distribution of engineering facilities. After preliminary analysis by the data processing module inside the UAV, this data is transmitted in real time to the ground control terminal, enabling dynamic monitoring of the mapping data. The drive motor 62 of the cutting section 6 starts, driving the rotating shaft 631 to rotate. The friction between the spring clip 635 and the drive ring 643 drives the rotation of each annular saw blade 641. Because the diameters of the drive rings 643 of different annular saw blades 641 vary, a differential rotation effect is created. When the UAV encounters a kite string on a cable during remote sensing mapping flight, the string quickly contacts the rotating annular saw blades 641. The differentially rotating saw teeth clamp the string from different directions, and the sharp blades quickly complete the cut, preventing the string from tangling with the flight section 5 and causing the UAV to lose control or the mapping to be interrupted, thus ensuring the continuity of the remote sensing mapping operation. Throughout the operation, the roller 655 of the limiting section 65 rolls in contact with the annular groove 642 of the annular saw blade 641, reducing rotational friction and ensuring smooth cutting. The isolation section separates adjacent annular saw blades 641 to avoid interference, and the pressure plate 652 ensures cutting stability through axial limiting. The detection probe 4 continuously collects remote sensing data and corrects it by combining it with the real-time flight attitude data of the UAV to ensure the accuracy of the surveying data. The collected remote sensing data is encrypted and stored in the local storage module of the UAV, and is simultaneously uploaded to the ground terminal so that the staff can check the surveying progress and data quality in real time. After the remote sensing surveying of all preset areas is completed, the UAV returns according to the planned route. The whole process realizes the collaborative operation of remote sensing surveying and obstacle removal, and efficiently completes the engineering surveying task.

[0027] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any other way. Any person skilled in the art may utilize the disclosed technical content to make changes or modifications to create equivalent embodiments applicable to other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, still fall within the protection scope of the present invention. In the description of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood through specific circumstances.

Claims

1. An engineering surveying and mapping device based on remote sensing mapping technology, comprising an unmanned aerial vehicle (UAV) body (1), characterized in that: The upper part of the drone body (1) is detachably equipped with a battery (2), wherein the battery (2) is a lithium battery. The bottom of the drone body (1) is equipped with a bracket (3) and a detection probe (4). The side of the drone body (1) is equipped with a flight unit (5), wherein the flight unit (5) includes a propeller driven by a motor. The upper part of the flight unit (5) is provided with a cutting part (6), wherein the cutting part (6) can cut the kite string hanging on the cable.

2. The engineering surveying device based on remote sensing mapping technology according to claim 1, characterized in that: The cutting part (6) includes a blade part (64), in which a ring saw (641) can rotate on the flying part (5). Multiple ring saws (641) are provided, and the rotation speeds of the multiple ring saws (641) are different, so multiple ring saws (641) can be used to cut kite strings.

3. The engineering surveying device based on remote sensing mapping technology according to claim 2, characterized in that: The blade (64) includes a ring saw (641), and a drive ring (643) is fixedly connected to the port of the ring saw (641). An annular groove (642) is provided on the ring saw (641), and a limiting part (65) is provided inside the annular groove (642). The ring saw (641) can rotate on the flight part (5) with the help of the limiting part (65). A drive motor (62) is fixedly connected to the UAV body (1) with the help of a fixing plate (61). The drive motor (62) abuts against the drive ring (643) with the help of the drive part (63). The drive motor (62) can drive the ring saw (641) to rotate and cut the kite string.

4. The engineering surveying device based on remote sensing mapping technology according to claim 3, characterized in that: The drive unit (63) includes a rotating shaft (631), which is fixedly mounted on the output shaft of the drive motor (62). A center plate (633) is fixedly connected to the surface of the rotating shaft (631). A first movable plate (632) and a second movable plate (634) are provided on the upper and lower sides of the center plate (633). The first movable plate (632) and the second movable plate (634) slide on the surface of the rotating shaft (631). A spring strip (635) is fixedly connected between the first movable plate (632) and the center plate (633). The second movable plate (634) is fixedly connected to the center plate (633). The device is connected to a spring bar (635) and also includes a nut (636). The nut (636) rotates on the surface of the shaft (631) to press the first movable plate (632) and the second movable plate (634) so ​​that they slide along the surface of the shaft (631) and press the spring bar (635). The spring bar (635) can be used to press against the drive ring (643) on the surface of different annular saw blades (641). The drive ring (643) on the surface of different annular saw blades (641) has a different diameter. The shaft (631) can drive the annular saw blades (641) of different diameters to have different rotation speeds, which facilitates cutting kite strings.

5. The engineering surveying device based on remote sensing mapping technology according to claim 4, characterized in that: The side of the ring saw (641) is provided with saw teeth, wherein the surface of the saw teeth is provided with cutting edges, and the multiple ring saws (641) can clamp and cut the kite string by rotating at different speeds.

6. The engineering surveying device based on remote sensing mapping technology according to claim 4, characterized in that: Multiple elastic bars (635) are provided, and the multiple elastic bars (635) are evenly arranged on the surface of the rotating shaft (631). The elastic bars (635) are curved away from the rotating shaft (631) and arch outward.

7. The engineering surveying device based on remote sensing mapping technology according to claim 3, characterized in that: The limiting part (65) includes a central shaft (651), which is fixed to the upper end of the flight part (5). An isolation part is fixedly connected to the surface of the central shaft (651), which can separate the two annular saw blades (641). A pressure plate (652) is threaded onto the upper end of the central shaft (651), and the central shaft (651) passes through the annular groove (642).

8. The engineering surveying device based on remote sensing mapping technology according to claim 7, characterized in that: The isolation section includes a first clamping plate (653) and a second clamping plate (654). The second clamping plate (654) and the central shaft (651) are fixed, while the first clamping plate (653) and the central shaft (651) are slidable. A roller (655) is rotatably installed between the first clamping plate (653) and the second clamping plate (654). The first clamping plate (653) and the second clamping plate (654) are detachable.

9. The engineering surveying device based on remote sensing mapping technology according to claim 8, characterized in that: A rotating groove (656) is provided between the first clamping plate (653) and the second clamping plate (654). When the first clamping plate (653) and the second clamping plate (654) are fixedly installed close to each other, the roller (655) is located in the rotating groove (656). The first clamping plate (653) and the second clamping plate (654) can clamp the roller (655). The roller (655) can rotate in the rotating groove (656) between the first clamping plate (653) and the second clamping plate (654). The roller (655) can contact the surface of the ring saw (641) to allow the ring saw (641) to rotate smoothly.

10. The engineering surveying device based on remote sensing mapping technology according to claim 8, characterized in that: The second clamping plate (654) has a square groove (657). The upper end of the first clamping plate (653) is fixedly connected to an installation block (658). When the first clamping plate (653) and the second clamping plate (654) are assembled together, the installation block (658) can be inserted into the square groove (657). The installation block (658) has a cross groove. A pin (659) is screwed into the center of the cross groove. The pin (659) has a conical structure. When the pin (659) is screwed into the cross groove, the installation block (658) expands and presses against the square groove (657) to fix the first clamping plate (653) and the second clamping plate (654).

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