An aerial survey laser ranging device for being mounted on a drone

Abstract

The present invention discloses a flight survey laser ranging device for being mounted on an unmanned aerial vehicle in the technical field of flight survey equipment. The flight survey laser ranging device includes a mounting platform, a mounting rack is connected to the upper end surface of the mounting platform, a center of gravity adjusting mechanism is installed at the lower end of the mounting platform, two shock absorption mechanisms are installed at the lower end of the center of gravity adjusting mechanism, a measurement adjusting mechanism is installed at the lower end of the two shock absorption mechanisms, and a rangefinder is installed on the measurement adjusting mechanism through a fixing mechanism; through the structural setting of the shock absorption mechanism in this solution, after this device is mounted on the unmanned aerial vehicle, during the driving process of the unmanned aerial vehicle, when the unmanned aerial vehicle turns left or right, or ascends or descends, or accelerates or decelerates, due to the effect of inertia, relative movement will occur when the rangefinder is mounted on the unmanned aerial vehicle, further causing the rangefinder to shake. The shock absorption mechanism can buffer the shake received by the rangefinder, thereby improving the measurement accuracy of the rangefinder.

Description

Technical Field

[0001] The present invention relates to the technical field of aerial surveying equipment, and particularly to an aerial surveying laser ranging device for being mounted on a drone. Background Art

[0002] An aerial surveying laser ranging device mounted on a drone is usually called LIDAR, also known as a lidar. It uses a technology similar to a sonar system, but uses laser pulses instead of sound waves to measure distances. LIDAR can create extremely accurate three-dimensional models by scanning an entire area and is mainly applied in fields such as remote sensing, geological exploration, and military reconnaissance. With the development of technology and the continuous increase in social demands, the demand for high-precision ranging equipment carried by drones is also increasing day by day.

[0003] After retrieval, Chinese Patent No. CN201711186437.9 discloses an aerial surveying laser ranging device for being mounted on a drone, which includes a drone main body, a control module, and a ranging module. The ranging module includes a laser generator, a collimating objective lens located at the emission end of the laser generator for converting the light emitted by the laser generator into a collimated measurement beam, a receiving objective lens for receiving the reflected measurement light reflected from the object to be measured and imaging it, a photodetector disposed inside the laser ranging module for receiving the reflected measurement light, and an optical path conversion mechanism disposed on the propagation path of the collimated measurement beam. The optical path conversion mechanism includes a diaphragm that can be rotated to a reflective position and a light-transmitting position. The above device only needs to install the ranging module around the outside of an ordinary drone, and can realize the function of automatically measuring the distance from obstacles during the flight of the drone, and send out signals in time to realize the process of avoiding obstacles.

[0004] Most of the existing aerial surveying laser ranging devices mounted on drones are rigidly connected to the drones. Since there are many size models of drones and the mounting positions on different types of drones are different, after the ranging devices of different models are mounted on the drones, the overall center of gravity of the drones and the mounted aerial surveying laser ranging devices will change, further causing the drones to be unable to stabilize themselves during flight. For this reason, we propose an aerial surveying laser ranging device for being mounted on a drone. Summary of the Invention

[0005] The purpose of the present invention is to provide an aerial surveying laser ranging device for being mounted on a drone to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides an aerial survey laser ranging device for being mounted on a drone, which includes a mounting platform and a rangefinder. A mounting rack is connected to the upper end surface of the mounting platform. A center of gravity adjusting mechanism is installed at the lower end of the mounting platform. Two shock absorption mechanisms are installed at the lower end of the center of gravity adjusting mechanism. A measurement adjusting mechanism is installed at the lower end of the two shock absorption mechanisms. The rangefinder is installed on the measurement adjusting mechanism through a fixing mechanism;

[0007] The center of gravity adjusting mechanism includes a first motor connected to the surface of the mounting platform. A steering plate is connected to the output shaft of the first motor. The steering plate is located below the mounting platform. Mounting seats are connected to both ends of the first motor. A limiting rod and a lead screw are inserted in parallel in the two mounting seats. A second motor is installed on the side surface of the steering plate. The second motor is fixedly installed on one of the mounting seats, and its output shaft is in transmission connection with the lead screw. Sliding platforms are installed on the surfaces of the limiting rod and the lead screw. There are two sets of sliding platforms. Each set of sliding platforms is in threaded connection with the lead screw and is slidably connected to the limiting rod. The two shock absorption mechanisms are respectively installed on the two sliding platforms.

[0008] A further technical solution of the present invention: The shock absorption mechanism includes an installation box connected to the lower end surface of the sliding platform. The inside of the installation box is hollow and open downward. A limiting seat is connected inside the installation box. A spherical limiting groove is provided on the lower end surface of the limiting seat. A limiting ball is inside the spherical limiting groove on the surface of the limiting seat. A limiting sliding rod is connected to the lower end of the limiting ball. The lower end of the limiting sliding rod is inserted into a limiting sleeve rod. The measurement adjusting mechanism is connected to the lower end of the limiting sleeve rod. Limiting protrusions are connected to the two side surfaces of the limiting sliding rod. A limiting sliding groove adapted to the limiting protrusions is provided on the surface of the limiting sleeve rod. The limiting protrusions are inserted into the limiting sliding groove. A first shock absorption spring is connected to the lower end surface of the limiting sliding rod. The other end of the first shock absorption spring is connected to the inner wall of the limiting sleeve rod.

[0009] A further technical solution of the present invention: The measurement adjusting mechanism includes a fixing plate connected to the lower ends of the two shock absorption mechanisms. A third motor is connected to the surface of the fixing plate. A mounting shaft is inserted into the lower end of the fixing plate. The output shaft of the third motor is in transmission connection with the mounting shaft. A steering platform is connected to the lower end of the mounting shaft. A steering block is hinged inside the steering platform. A mounting plate is connected to the lower end surface of the steering block. A fourth motor is connected to the surface of the steering platform. The output shaft of the fourth motor is in transmission connection with the steering block. The fixing mechanism is installed on the surface of the mounting plate.

[0010] A preferred technical solution of the present invention: There are two limiting rods, symmetrically arranged on both sides of the lead screw.

[0011] A preferred technical solution of the present invention: The surface area of the spherical limiting groove in the limiting seat that wraps the limiting ball is greater than one-half.

[0012] A preferred technical solution of the present invention: A limiting slide rail is connected to the surface of the limiting slide rod, a limiting insertion rod is connected in the limiting slide rail, a telescopic rod is inserted in the limiting slide rail, a jack is arranged on the surface of the telescopic rod, the limiting insertion rod is inserted in the jack, two groups of second shock-absorbing springs are sleeved on the surface of the limiting insertion rod, one end of each of the two groups of second shock-absorbing springs is connected to the telescopic rod and the other end is connected to the inner wall of the limiting slide rail, the other end of the telescopic rod is inserted in the sleeve, and the sleeve is connected to the surface of the installation box.

[0013] A preferred technical solution of the present invention: Limiting card slots are arranged on both side surfaces of the installation plate. The fixing mechanism includes two groups of sliding plates connected to the side surface of the installation plate. A threaded hole is arranged at the upper end of the sliding plate and a fixing bolt is inserted in the threaded hole. The sliding plate is inserted into the limiting card slot on the side surface of the installation plate through the fixing bolt. A horizontal clamping plate is arranged on the side surface of the sliding plate and a vertical clamping plate is arranged at the bottom.

[0014] A preferred technical solution of the present invention: At least two groups of limiting slide rails are connected to the surface of the limiting slide rod and are vertically distributed. One group of the limiting slide rails is parallel to the mounting platform, and the heights of two adjacent groups of the limiting slide rails are different.

[0015] A preferred technical solution of the present invention: One end of the telescopic rod inserted in the sleeve is connected with a return spring, and the other end of the return spring is connected to the inner wall of the sleeve.

[0016] A preferred technical solution of the present invention: The sliding plate is set to be "L"-shaped. The horizontal clamping plate is installed in the middle of the vertical plate body of the L-shaped sliding plate through a horizontal slide rod. A threaded hole is arranged on the surface of the sliding plate and a horizontal limiting bolt is inserted in the threaded hole. The horizontal limiting bolt abuts against the surface of the horizontal slide rod; the vertical clamping plate is installed in the middle of the horizontal plate body of the L-shaped sliding plate through a vertical slide rod. A threaded hole is arranged on the surface of the sliding plate and a vertical limiting bolt is inserted in the threaded hole. The vertical limiting bolt abuts against the surface of the vertical slide rod.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] (1) Through the structural arrangement of the center-of-gravity adjustment mechanism in the present application, after the device is mounted on the unmanned aerial vehicle, the center-of-gravity position of the device and the unmanned aerial vehicle as a whole can be adjusted through the center-of-gravity adjustment mechanism, further facilitating the stable flight of the unmanned aerial vehicle;

[0019] (2) Through the structural arrangement of the shock absorption mechanism in this application, after this device is mounted on a drone, during the flight of the drone, when the drone turns left or right, moves up or down, or accelerates or decelerates, due to inertia, the rangefinder mounted on the drone will undergo relative movement, further causing the rangefinder to shake. The shock absorption mechanism can buffer the shaking received by the rangefinder, thereby improving the measurement accuracy of the rangefinder.

[0020] (3) Through the structural arrangement of the measurement adjustment mechanism and the fixing mechanism in this application, drones of different models can be installed on the measurement adjustment mechanism, and the angle orientation and tilt angle of the measurement adjustment mechanism can be adjusted through the measurement adjustment mechanism, improving the applicability of this device. Brief Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of the present invention;

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

[0023] Figure 3 is a bottom view schematic structural diagram of the present invention;

[0024] Figure 4 is a bottom view schematic structural diagram of the center of gravity adjustment mechanism of the present invention;

[0025] Figure 5 is a schematic structural diagram of the center of gravity adjustment mechanism of the present invention;

[0026] Figure 6 is a schematic structural diagram of the shock absorption mechanism of the present invention;

[0027] Figure 7 is a schematic internal structural diagram of the shock absorption mechanism of the present invention;

[0028] Figure 8 is an exploded schematic structural diagram of the shock absorption mechanism of the present invention;

[0029] Figure 9 is a partial exploded schematic structural diagram of the shock absorption mechanism of the present invention;

[0030] Figure 10 is a schematic structural diagram of the adjustment mechanism of the present invention;

[0031] Figure 11 is a schematic installation diagram of the rangefinder of the present invention;

[0032] Figure 12 is a schematic structural diagram of the fixing mechanism of the present invention.

[0033] In the figure: 1. Mounting platform; 2. Mounting rack; 3. Center of gravity adjustment mechanism; 301. First motor; 302. Steering plate; 303. Mounting seat; 304. Limiting rod; 305. Lead screw; 306. Second motor; 307. Slide table; 4. Shock absorption mechanism; 401. Mounting box; 402. Limiting seat; 403. Limiting ball; 404. Limiting slide bar; 405. Limiting sleeve bar; 406. First shock absorption spring; 407. Limiting convex block; 408. Limiting chute; 409. Sleeve; 410. Telescopic rod; 411. Return spring; 412. Limiting slide rail; 413. Limiting insertion rod; 414. Insertion hole; 415. Second shock absorption spring; 5. Measurement and adjustment mechanism; 501. Fixed plate; 502. Third motor; 503. Mounting shaft; 504. Steering platform; 505. Steering block; 506. Fourth motor; 507. Mounting plate; 508. Limiting card slot; 6. Fixing mechanism; 601. Slide plate; 602. Fixing bolt; 603. Horizontal slide bar; 604. Horizontal clamping plate; 605. Horizontal limiting bolt; 606. Vertical slide bar; 607. Vertical clamping plate; 608. Vertical limiting bolt; 7. Rangefinder. Detailed implementation mode

[0034] The present invention will be further described below in conjunction with the drawings and embodiments. The attached Figures 1 to 12 All are the drawings of the embodiments, which are drawn in a simplified manner and are only used to clearly and concisely illustrate the purpose of the embodiments of the present invention. The technical solutions shown in the drawings below are the specific solutions of the embodiments of the present invention and are not intended to limit the scope of the present invention to be protected. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0035] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings, or the orientation or positional relationships in which the product of the invention is usually placed during use, or the orientation or positional relationships commonly understood by those skilled in the art. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for differential description and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should also be noted that, unless otherwise clearly specified and defined, terms such as "set" and "connect" should be understood in a broad sense. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The embodiment provides an aerial survey laser ranging device for being mounted on a drone, as Figures 1 to 3 shown. The aerial survey laser ranging device includes a mounting platform 1. A mounting frame 2 is connected to the upper end surface of the mounting platform 1. Through the mounting frame 2, the mounting platform 1 can be mounted on the drone. A center-of-gravity adjustment mechanism 3 is installed at the lower end of the mounting platform 1. After the mounting platform 1 is mounted on the drone at different positions through the mounting frame 2, the center-of-gravity adjustment mechanism 3 can adjust the center-of-gravity position of the device and the drone as a whole, further facilitating the stable flight of the drone. A shock-absorbing mechanism 4 is installed at the lower end of the center-of-gravity adjustment mechanism 3. When the center-of-gravity adjustment mechanism 3 completes the center-of-gravity adjustment, during the flight of the drone, when the drone turns left or right, ascends or descends, or accelerates or decelerates, due to inertia, relative movement will occur to the ranging instrument 7 mounted on the drone, further causing the ranging instrument 7 to shake. The shock-absorbing mechanism 4 can buffer the shaking received by the ranging instrument 7, thereby improving the measurement accuracy of the ranging instrument 7. And a measurement adjustment mechanism 5 is installed at the lower end of the shock-absorbing mechanism 4. The ranging instrument 7 is installed on the measurement adjustment mechanism 5 through a fixing mechanism 6. Through the measurement adjustment mechanism 5, the ranging instrument 7 can be adjusted during measurement, and through the fixing mechanism 6, ranging instruments 7 of different models can be fixed on the measurement adjustment mechanism 5, improving the applicability of the device.

[0038] The center-of-gravity adjustment mechanism 3 in the embodiment is as Figure 4 and Figure 5As shown in the figure, it includes a first motor 301 connected to the surface of the mounting platform 1. A steering plate 302 is connected to the output shaft of the first motor 301. The steering plate 302 is located below the mounting platform 1. By turning on the first motor 301, the steering plate 302 can be driven to rotate. At the same time, both ends of the first motor 301 are connected with mounting seats 303. Two parallelly distributed limiting rods 304 and a lead screw 305 are inserted into the two groups of mounting seats 303. The two limiting rods 304 are symmetrically arranged on both sides of the lead screw 305. A second motor 306 is installed on the side surface of the steering plate 302. The second motor 306 is fixed on one of the mounting seats 303, and its output shaft is in transmission connection with the lead screw 305. After the second motor 306 is turned on, the lead screw 305 is driven to rotate. Matching sliders 307 are installed on the surfaces of the limiting rods 304 and the lead screw 305. The sliders 307 are provided in two groups. Each group of sliders 307 is threadedly sleeved on the lead screw 305 and slidably connected to the limiting rods 304. When the lead screw 305 rotates, the sliders 307 can be driven to move horizontally on the lead screw 305 and the limiting rods 304.

[0039] After the mounting frame 2 is fixed on the unmanned aerial vehicle, the second motor 306 is used to drive the lead screw 305 to rotate within the two groups of sliders 307, further controlling the sliding of the two groups of sliders 307 on the surface of the lead screw 305. And the two groups of sliders 307 can only linearly slide on the surfaces of the limiting rods 304 and the lead screw 305, further changing the positions of the two groups of sliders 307 below the steering plate 302, so as to adjust the overall center of gravity position of the center of gravity adjustment mechanism 3 after being installed on the unmanned aerial vehicle, facilitating the stable operation of the unmanned aerial vehicle during flight. And when the unmanned aerial vehicle swings due to the influence of wind during flight, the second motor 306 is used to drive the sliders 307 to slide to change the center of gravity position, which can balance the swing of the unmanned aerial vehicle. At the same time, the first motor 301 can drive the steering plate 302 to rotate, enabling the sliders 307 to slide and adjust in any direction, improving the overall applicability of the center of gravity adjustment mechanism 3.

[0040] The embodiment provides an aerial survey laser ranging device for unmanned aerial vehicle mounting, as Figures 1 to 3 shown, shock absorption mechanisms 4 are installed at the lower ends of the two groups of sliders 307, as Figures 6 to 8As shown, the shock absorption mechanism 4 includes a mounting box 401 connected to the lower surface of the sliding table 307. The inside of the mounting box 401 is hollow and open downward. A limiting seat 402 is connected inside the mounting box 401. A spherical limiting groove is provided on the lower surface of the limiting seat 402. The limiting ball 403 is inserted into the spherical limiting groove provided on the surface of the limiting seat 402, and the surface area of the spherical limiting groove in the limiting seat 402 that wraps the limiting ball 403 exceeds one-half, so that the limiting ball 403 will not fall even when it is hanging upside down in the spherical limiting groove on the surface of the limiting seat 402; the lower end of the limiting ball 403 is connected to a limiting slide rod 404, and the lower end of the limiting slide rod 404 is inserted into a limiting sleeve rod 405. After the distance measuring instrument 7 is installed on the measuring and adjusting mechanism 5 through the fixing mechanism 6, the measuring and adjusting mechanism 5 can be mounted through the shock absorption mechanism 4. Under the action of gravity, the measuring and adjusting mechanism 5 will pull the limiting sleeve rod 405 to slide downward on the surface of the limiting slide rod 404 until the limiting sleeve rod 405 slides to the lowermost end of the limiting slide rod 404.

[0041] The shock absorption mechanism 4 in the embodiment is as Figures 6 to 8 As shown, limiting protrusions 407 are connected to both side surfaces of the limiting slide rod 404, and a limiting chute 408 adapted to the limiting protrusions 407 is provided on the surface of the limiting sleeve rod 405. The limiting protrusions 407 are inserted into the limiting chute 408. The limiting protrusions 407 can limit between the limiting slide rod 404 and the limiting sleeve rod 405, and can prevent the limiting sleeve rod 405 from slipping off the surface of the limiting slide rod 404. At the same time, a first shock absorption spring 406 is connected to the lower surface of the limiting slide rod 404, and the other end of the first shock absorption spring 406 is connected to the inner wall of the limiting sleeve rod 405. When the limiting sleeve rod 405 slides downward, it will pull the first shock absorption spring 406 to extend, further preventing the limiting sleeve rod 405 from completely sliding to the lowermost end of the limiting slide rod 404. During the flight of the drone, when the drone suddenly ascends or descends, the distance measuring instrument 7 is installed on the measuring and adjusting mechanism 5 through the fixing mechanism 6. Due to inertia, the distance measuring instrument 7 will suddenly shake up and down. The limiting sleeve rod 405 slides on the surface of the limiting slide rod 404, and squeezes or pulls the first shock absorption spring 406 during the sliding process. Further, the elasticity of the first shock absorption spring 406 buffers the pulling or compression, thereby reducing the amplitude of the up and down shaking of the distance measuring instrument 7 and preventing the monitoring data of the distance measuring instrument 7 from being inaccurate.

[0042] The shock absorption mechanism 4 in the embodiment is as Figures 6 to 9As shown, a limiting slide rail 412 is connected to the surface of the limiting slide bar 404. At the same time, a limiting insertion rod 413 is connected inside the limiting slide rail 412. The telescopic rod 410 is inserted into the limiting slide rail 412. And a jack 414 is arranged on the surface of the telescopic rod 410. The limiting insertion rod 413 is inserted into the jack 414. Therefore, the telescopic rod 410 can linearly slide on the surface of the limiting insertion rod 413. Two groups of second shock-absorbing springs 415 are sleeved on the surface of the limiting insertion rod 413. One end of each of the two groups of second shock-absorbing springs 415 is connected to the telescopic rod 410 and the other end is connected to the inner wall of the limiting slide rail 412. The initial position of the telescopic rod 410 on the surface of the limiting insertion rod 413 is at the central position. Therefore, no matter which side the telescopic rod 410 slides on the surface of the limiting insertion rod 413, it will squeeze the second shock-absorbing spring 415 on that side and pull the second shock-absorbing spring 415 on the other side. The other end of the telescopic rod 410 is inserted into the sleeve 409. When the drone accelerates or is locked during forward and backward movement, the rangefinder 7 is installed on the measurement adjustment mechanism 5. Due to inertia, relative movement will occur. At this time, relative movement occurs through the limiting slide rail 412 and the telescopic rod 410. Further, the elastic force of the two groups of second shock-absorbing springs 415 is used to buffer the relative movement, thereby reducing the movement amplitude and further buffering the shaking of the rangefinder 7. At least two groups of limiting slide rails 412 are connected to the surface of the limiting slide bar 404 and are vertically distributed. And one group of limiting slide rails 412 is parallel to the mounting platform 1. So that no matter which direction the drone moves in the front, back, left or right directions, the shaking amplitude of the rangefinder 7 can be buffered. The heights of two adjacent groups of limiting slide rails 412 are different and are staggeredly distributed to avoid interference. At the same time, the sleeve 409 is connected to the surface of the mounting box 401. And a return spring 411 is connected to the end of the telescopic rod 410 inserted into the sleeve 409. The other end of the return spring 411 is connected to the inner wall of the sleeve 409. Therefore, when the drone moves to one side, the telescopic rod 410 in the vertical direction will slide in the sleeve 409. And the telescopic rod 410 will pull or squeeze the return spring 411 during the sliding process, further buffering the sliding amplitude of the telescopic rod 410. And after the drone flies stably, the telescopic rod 410 will reset under the elastic force of the return spring 411.

[0043] The embodiment provides an aerial survey laser ranging device for drone mounting, as Figure 6 and Figure 10As shown, the measurement adjustment mechanism 5 includes a fixing plate 501 connected to the lower ends of two groups of limit sleeve rods 405. A third motor 502 is connected to the surface of the fixing plate 501. At the same time, a mounting shaft 503 is inserted into the lower end of the fixing plate 501. The output shaft of the third motor 502 is in transmission connection with the mounting shaft 503. By turning on the third motor 502, the mounting shaft 503 can be driven to rotate. The lower end of the mounting shaft 503 is connected to a turntable 504. The turntable 504 is set in a "U" shape, and a steering block 505 is hinged inside the turntable 504. A mounting plate 507 is connected to the lower surface of the steering block 505. By driving the mounting shaft 503 to rotate through the third motor 502, the mounting plate 507 can be driven to rotate. The rangefinder 7 is installed on the surface of the mounting plate 507 through the fixing mechanism 6, further realizing the steering control of the mounting plate 507 and facilitating the rangefinder 7 to measure in different directions. A fourth motor 506 is connected to the surface of the turntable 504. The output shaft of the fourth motor 506 is in transmission connection with the steering block 505. When the fourth motor 506 is turned on, the steering block 505 connected to the mounting plate 507 is driven to rotate, adjusting the tilt angle of the rangefinder 7 and improving the convenience of using the rangefinder 7.

[0044] In the embodiment, the measuring mechanism 5 is as Figure 10 and Figure 11As shown, limiting card slots 508 are provided on both side surfaces of the mounting plate 507. The fixing mechanism 6 includes a sliding plate 601 connected to the side surface of the mounting plate 507. A threaded hole is provided at the upper end of the sliding plate 601, and a fixing bolt 602 is inserted into the threaded hole. The sliding plate 601 can be fastened to the outside of the limiting card slot 508 on the side surface of the mounting plate 507 through the fixing bolt 602, and the fixing bolt 602 can change its position within the limiting card slot 508 to further adjust the position of the sliding plate 601 on the side surface of the mounting plate 507. The sliding plate 601 is arranged in an "L" shape, and a horizontal sliding rod 603 is inserted into the middle of the vertical plate body of the sliding plate 601. One end of the horizontal sliding rod 603 is connected to a horizontal clamping plate 604. By sliding the sliding plate 601 to a proper position on the surface of the mounting plate 507 and further sliding the horizontal sliding rod 603, the horizontal clamping plate 604 abuts against the surface of the rangefinder 7. Through the cooperative use of two groups of fixing mechanisms 6, clamping and fixing of the rangefinder 7 are realized. Moreover, a threaded hole is provided on the surface of the sliding plate 601 and is communicated with the insertion hole of the horizontal sliding rod 603. A horizontal limiting bolt 605 is inserted into this threaded hole and abuts against the surface of the horizontal sliding rod 603 to further realize the fastening after the sliding of the horizontal sliding rod 603, thereby realizing the stable installation of the rangefinder 7. A vertical sliding rod 606 is inserted into the middle of the horizontal plate body of the sliding plate 601. One end of the vertical sliding rod 606 is connected to a vertical clamping plate 607. By sliding the vertical sliding rod 606, the vertical clamping plate 607 abuts against the surface of the rangefinder 7, which can further realize the clamping and fixing of the rangefinder 7. Moreover, a threaded hole is provided on the surface of the sliding plate 601 and is communicated with the insertion hole of the vertical sliding rod 606. A vertical limiting bolt 608 is inserted into this threaded hole and abuts against the surface of the vertical sliding rod 606 to further realize the fastening after the sliding of the vertical sliding rod 606, thereby realizing the stable installation of the rangefinder 7.

[0045] When the present invention works, after the mounting platform 1 is mounted on different positions of the unmanned aerial vehicle through the mounting frame 2, the center of gravity adjusting mechanism 3 adjusts the center of gravity position of the device and the whole unmanned aerial vehicle to facilitate the stable flight of the unmanned aerial vehicle. When the center of gravity adjusting mechanism 3 finishes adjusting the center of gravity, during the driving process of the unmanned aerial vehicle, if the unmanned aerial vehicle turns left and right, ascends and descends, or accelerates and decelerates, due to the action of inertia, the rangefinder 7 shakes. The shock absorption mechanism 4 can buffer the shaking received by the rangefinder 7, thereby improving the measurement accuracy of the rangefinder 7; the rangefinder 7 is mounted on the measurement adjusting mechanism 5 through the fixing mechanism 6. The measurement adjusting mechanism 5 can realize the adjustment of the rangefinder 7 during measurement, and different models of rangefinders 7 can be fixed on the measurement adjusting mechanism 5 through the fixing mechanism 6, improving the applicability of the device.

[0046] As described above, this is only one embodiment of the present invention, and its description is relatively specific and detailed. However, it should not be construed as a limitation on the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the appended claims.

Claims

1. An aerial survey laser ranging device for being mounted on a drone, comprising a mounting platform (1) and a rangefinder (7). A mounting rack (2) is connected to the upper end surface of the mounting platform (1). Characterized in that: A center of gravity adjusting mechanism (3) is installed at the lower end of the mounting platform (1). Two shock absorption mechanisms (4) are installed at the lower end of the center of gravity adjusting mechanism (3). A measurement adjusting mechanism (5) is installed at the lower end of the two shock absorption mechanisms (4). The rangefinder (7) is installed on the measurement adjusting mechanism (5) through a fixing mechanism (6). The center of gravity adjusting mechanism (3) includes a first motor (301) connected to the surface of the mounting platform (1). A steering plate (302) is connected to the output shaft of the first motor (301). The steering plate (302) is located below the mounting platform (1). Mounting seats (303) are connected to both ends of the steering plate (302). A limiting rod (304) and a lead screw (305) arranged in parallel are inserted into the two mounting seats (303). A second motor (306) is installed on the side surface of the steering plate (302). The second motor (306) is fixedly installed on one of the mounting seats (303), and its output shaft is in transmission connection with the lead screw (305). Sliding platforms (307) adapted to each other are installed on the surfaces of the limiting rod (304) and the lead screw (305). The sliding platforms (307) are provided in two groups. Each group of sliding platforms (307) is threadedly connected to the lead screw (305) and slidably connected to the limiting rod (304). The two shock absorption mechanisms (4) are respectively installed on the two sliding platforms (307).

2. The aerial survey laser ranging device for being mounted on a drone according to claim 1, Characterized in that: The shock absorption mechanism (4) includes a mounting box (401) connected to the lower end surface of the sliding platform (307). The interior of the mounting box (401) is hollow and open downward. A limiting seat (402) is connected inside the mounting box (401). A spherical limiting groove is provided on the lower end surface of the limiting seat (402). A limiting ball (403) is inside the spherical limiting groove on the surface of the limiting seat (402). A limiting sliding rod (404) is connected to the lower end of the limiting ball (403). The lower end of the limiting sliding rod (404) is inserted into a limiting sleeve rod (405). The measurement adjusting mechanism (5) is connected to the lower end of the limiting sleeve rod (405). Limiting protrusions (407) are connected to both side surfaces of the limiting sliding rod (404). A limiting sliding groove (408) adapted to the limiting protrusions (407) is provided on the surface of the limiting sleeve rod (405). The limiting protrusions (407) are inserted into the limiting sliding groove (408). A first shock absorption spring (406) is connected to the lower end surface of the limiting sliding rod (404). The other end of the first shock absorption spring (406) is connected to the inner wall of the limiting sleeve rod (405).

3. The aerial survey laser ranging device for being mounted on a drone according to claim 1 or 2, Characterized in that: The measurement and adjustment mechanism (5) includes a fixing plate (501) connected to the lower ends of two groups of shock absorption mechanisms (4). A third motor (502) is connected to the surface of the fixing plate (501). An installation shaft (503) is inserted into the lower end of the fixing plate (501). The output shaft of the third motor (502) is in transmission connection with the installation shaft (503). A turntable (504) is connected to the lower end of the installation shaft (503). A steering block (505) is hinged inside the turntable (504). An installation plate (507) is connected to the lower surface of the steering block (505). A fourth motor (506) is connected to the surface of the turntable (504). The output shaft of the fourth motor (506) is in transmission connection with the steering block (505). The fixing mechanism (6) is installed on the surface of the installation plate (507).

4. Aerial survey laser ranging device for UAV mounting according to claim 1 or 2, characterized in that: There are two limiting rods (304), symmetrically arranged on both sides of the lead screw (305).

5. Aerial survey laser ranging device for UAV mounting according to claim 2, characterized in that: The surface area of the spherical limiting groove in the limiting seat (402) that wraps the limiting ball (403) is greater than one half.

6. Aerial survey laser ranging device for UAV mounting according to claim 2, characterized in that: A limiting slide rail (412) is connected to the surface of the limiting slide bar (404). A limiting insertion rod (413) is connected inside the limiting slide rail (412). A telescopic rod (410) is inserted into the limiting slide rail (412). A jack (414) is arranged on the surface of the telescopic rod (410). The limiting insertion rod (413) is inserted into the jack (414). Two groups of second shock absorption springs (415) are sleeved on the surface of the limiting insertion rod (413). One end of each of the two groups of second shock absorption springs (415) is connected to the telescopic rod (410) and the other end is connected to the inner wall of the limiting slide rail (412). The other end of the telescopic rod (410) is inserted into a sleeve (409). The sleeve (409) is connected to the surface of the installation box (401).

7. Aerial survey laser ranging device for UAV mounting according to claim 3, characterized in that: Limiting card slots (508) are arranged on both side surfaces of the installation plate (507). The fixing mechanism (6) includes two groups of sliding plates (601) connected to the side surface of the installation plate (507). Threaded holes are arranged at the upper ends of the sliding plates (601) and fixing bolts (602) are inserted into the threaded holes. The sliding plates (601) are inserted into the limiting card slots (508) on the side surface of the installation plate (507) through the fixing bolts (602). A horizontal clamping plate (604) is arranged on the side surface of the sliding plate (601), and a vertical clamping plate (607) is arranged at the bottom.

8. Aerial survey laser ranging device for UAV mounting according to claim 6, characterized in that: At least two sets of limiting slide rails (412) are vertically connected to the surface of the limiting slide rod (404). One set of the limiting slide rails (412) is parallel to the mounting platform (1), and the heights of two adjacent sets of the limiting slide rails (412) are different.

9. Aerial survey laser ranging device for UAV mounting according to claim 6, characterized in that: One end of the telescopic rod (410) inserted into the sleeve (409) is connected with a return spring (411), and the other end of the return spring (411) is connected to the inner wall of the sleeve (409).

10. Aerial survey laser ranging device for UAV mounting according to claim 7, characterized in that: The sliding plate (601) is set in an "L" shape. The horizontal clamping plate (604) is installed in the middle of the vertical plate body of the L-shaped sliding plate (601) through a horizontal slide rod (603). Threaded holes are provided on the surface of the sliding plate (601), and horizontal limiting bolts (605) are inserted into the threaded holes. The horizontal limiting bolts (605) abut against the surface of the horizontal slide rod (603); the vertical clamping plate (607) is installed in the middle of the transverse plate body of the L-shaped sliding plate (601) through a vertical slide rod (606). Threaded holes are provided on the surface of the sliding plate (601), and vertical limiting bolts (608) are inserted into the threaded holes. The vertical limiting bolts (608) abut against the surface of the vertical slide rod (606).

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