Building deformation detection device based on unmanned aerial vehicle vision

Abstract

The invention relates to the technical field of unmanned aerial vehicles, and discloses a building deformation detection device based on unmanned aerial vehicle vision, which comprises a surveying and mapping unmanned aerial vehicle, a surveying and mapping camera is mounted at the belly of the surveying and mapping unmanned aerial vehicle, and the surveying and mapping surface of the surveying and mapping camera is divided into a radar surveying and mapping surface and an image photographing surface and is provided with a stage surface cleaning mechanism. The surveying and mapping surface is used for dynamically managing the surveying and mapping camera; the first protective film is timely wound and replaced through the winding piece, it can be ensured that the radar surveying and mapping part is always in the optimal working state, the first protective film can effectively prevent the radar surveying and mapping part from being polluted and damaged by external environments such as moisture, dust and dirt, and therefore it is ensured that the radar can continuously and stably work; and the data accuracy and reliability are improved.

Description

Technical Field

[0001] The present invention relates to the field of unmanned aerial vehicles, and more particularly to a building deformation detection device based on unmanned aerial vehicle vision. Background Art

[0002] A construction surveying drone is an unmanned aerial vehicle that is specially used in the fields of construction engineering, topographic surveying, urban planning, disaster assessment, etc. to obtain high-precision geospatial data and image information. This type of drone is usually equipped with high-resolution cameras, lidar, multi-spectral sensors and other equipment, and can perform three-dimensional modeling, topographic surveying, building facade scanning and other tasks.

[0003] In UAV mapping, the camera system and radar system on the mapping camera usually do not work in isolation, but complement each other and work together. The camera system can provide rich surface image information, while the radar system can provide high-precision distance and three-dimensional coordinate information. By integrating these two types of data, more accurate and complete surface models and maps can be generated. Before surveying, it is necessary to plan a suitable flight route for the drone based on factors such as the shape, size and surrounding environment of the building. This route should ensure that the drone can fully and accurately capture the image data of the building. The drone flies according to the planned route while maintaining a stable flight attitude. During the flight, the sensor will continuously capture the image data of the building. These data usually include images of the building from multiple perspectives and angles for subsequent three-dimensional reconstruction and deformation analysis.

[0004] However, when surveying the deformation of buildings in the mountains, after the surveying drone rises to a high altitude, when the humidity is high, water droplets and fog will appear on the shooting surface, and the backscattering coefficient of the lidar will also tend to increase accordingly, which may affect the measurement precision and accuracy of the lidar and cause errors in the surveying data. For this reason, we propose a building deformation detection device based on drone vision. Summary of the invention

[0005] The present invention provides a building deformation detection device based on drone vision, which solves the problem in the related art that when the humidity is high, water droplets and fog will appear on the shooting surface, and the backscattering coefficient of the laser radar will also tend to increase accordingly, which may affect the measurement precision and accuracy of the laser radar and cause errors in the surveying and mapping data.

[0006] The present invention provides a building deformation detection device based on drone vision, comprising a surveying drone, a surveying camera is installed on the belly of the surveying drone, the surveying surface of the surveying camera is divided into two parts: a radar surveying surface and an image photographing surface, and the surveying surface of the surveying camera is provided with a stage surface clearing mechanism for dynamically managing the surveying surface of the surveying camera; The stage surface cleaning mechanism includes a protective film, a film-releasing member and a winding member. The film-releasing member includes a reel-unloading member with a built-in protective film. The film outlet of the reel-unloading member is recessed in the radar mapping surface of the mapping camera mapping surface. The winding member includes a winding drum. The winding drum has a built-in film collecting drum for collecting used protective film. A film buffering arm 2 is fixedly provided on one side of the film inlet of the winding drum and is installed on the opposite side of the air contact surface. A humidity sensor is fixedly provided on the side of the film inlet of the winding drum away from the film buffering arm 2, directly facing the air contact surface of the protective film.

[0007] Furthermore, the surveying and mapping UAV includes a parking platform, which is set up at a preset shooting point of the surveying and mapping camera. The surveying and mapping UAV flies to the parking platform at the first surveying and mapping point, adjusts the angle of the surveying and mapping camera to be the same as the first surveying and mapping angle, and then surveys the designated building.

[0008] Furthermore, the corners of the surveying and mapping UAV are respectively equipped with arms, and the end of each arm is equipped with a rotor body. A mounting part is installed at the belly of the surveying and mapping UAV, and a control rolling mechanism is arranged on one of the rotor bodies. The control rolling mechanism includes a thrust receiving cylinder, and the rotating column of the rotor body passes through the thrust receiving cylinder. A telescopic column is penetrated inside the upper wall of the thrust receiving cylinder, and a magnetic block is fixedly embedded on the bottom wall of the telescopic column. A blocking plate is fixedly arranged on one side of the rotating column of the rotor body, and the telescopic column is not in contact with the blocking plate in an initial state.

[0009] Furthermore, a swivel ring is rotatably embedded on the outer wall of the thrust receiving cylinder, a rotating plate rotatably connected to the thrust receiving cylinder is fixedly arranged on the inner side of the swivel ring, a plurality of magnetic balls are rotatably arranged inside the rotating plate, and the magnetic balls are divided into magnetic and non-magnetic parts, a ball-moving column is arranged below the magnetic balls, a fixing ring is fixedly arranged below the ball-moving column, and the fixing ring is fixedly connected to the rotor body.

[0010] Furthermore, a take-up wheel is fixedly provided below the pushed cylinder, a reciprocating belt is fixedly provided between the take-up wheels, an assembly block is fixedly provided at one end of the reciprocating belt away from the take-up wheel, the assembly block is slidably connected to the machine arm, and an elastic belt is fixedly provided on one side of the assembly block away from the reciprocating belt.

[0011] Furthermore, a side box is fixedly provided on the side wall of the surveying and mapping camera, and a reduction gear group composed of multiple groups of gears and pulleys is rotatably provided inside the side box, and the connections between the gears and the pulleys are ratchet connections, a connecting rope is wrapped around the power supply end of the reduction gear group, and the end of the connecting rope away from the reduction gear group is connected to the assembly block, a transmission belt is provided at the end of the reduction gear group away from the power supply, and an electromagnet fixedly connected to the side box is provided on one side of the reduction gear group, a pulling wire is fixedly connected to the telescopic arm of the electromagnet, and the end of the pulling wire away from the electromagnet is fixedly connected to the swivel.

[0012] Furthermore, the film unwinding part also includes unwinding drum 2, and the protective films released from unwinding drum 1 and unwinding drum 2 are respectively the first protective film and the second protective film. The internal rotation of the winding drum has two mounting columns, and film winding drums are engaged with the two mounting columns, and the two film winding drums respectively wind up the first protective film and the second protective film.

[0013] Furthermore, a gear rotatably connected to the winding drum is fixedly provided at one end of the two mounting posts close to the side box, and a gear wheel 1 rotatably connected to the winding drum is meshed between the two pinions.

[0014] Furthermore, a film-slowing arm 1 is fixedly arranged on one side of the film-collecting cylinder close to the winding opening of the second protective film, and a film-slowing arm 2 and a humidity sensor are respectively arranged on both sides of the film-collecting cylinder close to the winding opening of the first protective film.

[0015] Furthermore, a first film roll is rotatably arranged inside the unwinding reel one, and an unused first protective film is wound around the first film roll; a second film roll is rotatably arranged inside the unwinding reel two, and an unused second protective film is wound around the second unwinding reel.

[0016] The beneficial effects of the present invention are: The present invention can ensure that the radar mapping part is always in the best working state by timely rolling up and replacing the first protective film through the rolling piece. The first protective film can effectively prevent the radar mapping part from being polluted and damaged by the external environment such as moisture, dust, dirt, etc., thereby ensuring that the radar can work continuously and stably and improving the accuracy and reliability of the data. The first protective film and the second protective film are automatically reeled up through the reel control mechanism. The operator can flexibly adjust the covering status of the protective film according to the actual picture effect, which effectively protects the surveying and mapping camera lens, prolongs its service life, and reduces the phenomenon of blurred shooting images caused by lens contamination. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the rotor body structure of the present invention; Figure 3It is a schematic diagram of the upward-looking structure of the surveying and mapping UAV of the present invention; Figure 4 It is a schematic diagram of the structure of the mounting member of the present invention; Figure 5 It is a partial cross-sectional structural schematic diagram of the thrust receiving cylinder of the present invention; Figure 6 It is a schematic diagram of the side box structure of the present invention; Figure 7 It is a schematic diagram of the winding drum structure of the present invention; Figure 8 It is a schematic diagram of the internal structure of the side box of the present invention; Fig. 9 The present invention Figure 8 The enlarged schematic diagram at A in the middle; Fig.10 It is a schematic diagram of the internal structure of the winding drum of the present invention.

[0018] In the figure: 11, mapping drone; 12, mounting parts; 13, mapping camera; 14, machine arm; 15, rotor body; 2, stage cleaning mechanism; 21, unwinding drum 1; 22, winding drum; 23, unwinding drum 2; 24, film easing arm 1; 25, first protective film; 26, second protective film; 27, film easing arm 2; 28, humidity sensor; 29, film rolling drum 1; 201, film winding drum; 202, toothed disc 1; 203, film rolling drum 2; 204, Mounting column; 3. Winding control mechanism; 31. Push cylinder; 32. Winding wheel; 33. Pulling wire; 34. Reciprocating belt; 35. Assembly block; 36. Elastic band; 37. Rotating plate; 38. Magnetic ball; 39. Fixed ring; 301. Ball-moving column; 302. Magnetic block; 303. Telescopic column; 304. Swivel; 41. Side box; 43. Connecting rope; 44. Electromagnet; 45. Reduction gear set; 46. Transmission belt; 5. Blocking plate; 6. Stop platform. DETAILED DESCRIPTION

[0019] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0020] like Figure 1 and Figure 2As shown, a building deformation detection device based on drone vision includes a surveying drone 11, a surveying camera 13 is installed on the belly of the surveying drone 11, and the surveying surface of the surveying camera 13 is divided into two parts: a radar surveying surface and an image photographing surface. The surveying surface of the surveying camera 13 is provided with a stage clearing mechanism 2 for dynamically managing the surveying surface of the surveying camera 13; The stage surface cleaning mechanism 2 includes a protective film, a film-releasing member and a winding member. The film-releasing member includes a winding drum 21 with a built-in protective film. The film outlet of the winding drum 21 is recessed in the radar mapping surface of the mapping camera 13. The winding member includes a winding drum 22. The winding drum 22 has a built-in film collecting drum 201 for collecting used protective films. A film buffer arm 27 is fixedly provided on one side of the film inlet of the winding drum 22 and is installed on the opposite side of the air contact surface. A humidity sensor 28 is fixedly provided on the side of the film inlet of the winding drum 22 away from the film buffer arm 27, directly facing the air contact surface of the protective film.

[0021] The surveying and mapping UAV 11 can perform surveying and mapping in flight or at a fixed location on the parking platform 6. This flexibility allows the surveying and mapping work to be adjusted according to actual needs and conditions, thereby improving the convenience and efficiency of the surveying and mapping work.

[0022] The surveying and mapping UAV 11 includes a parking platform 6, which is set up at a preset shooting point of the surveying and mapping camera 13. The surveying and mapping UAV 11 flies to the parking platform 6 at the first surveying point, adjusts the angle of the surveying and mapping camera 13 to be the same as the first surveying angle, and then surveys the designated building.

[0023] The parking platform 6 is a pole, and a platform for taking off and landing the mapping drone 11 is fixed on the top of the pole. Since the parking platform 6 is located on a distant mountain top, the mapping drone 11 can map the building from an inclined angle. This inclined mapping can provide data from different perspectives of the building, which helps to more fully understand the structure and characteristics of the building. The surveying and mapping UAV 11 takes off from the take-off point and flies to the designated parking platform 6 according to the preset route. The parking platform 6 is set at the preset shooting point of the surveying and mapping camera 13 to ensure that the surveying and mapping UAV 11 can reach the ideal surveying and mapping position. After the surveying and mapping UAV 11 lands on the parking platform 6, the angle of the surveying and mapping camera 13 is adjusted through the airborne control system to keep it consistent with the angle during the first surveying and mapping. Then, the surveying and mapping camera 13 shoots and maps the designated building, and the surveying and mapping data is transmitted to the ground station or data center by wireless means for subsequent processing and analysis; By fixing the position of the surveying and mapping UAV 11 and the angle of the surveying and mapping camera 13 by the parking platform 6, it can be ensured that consistent and high-precision data can be obtained each time the surveying and mapping is performed, which helps to reduce the surveying and mapping errors caused by changes in the position or angle of the surveying and mapping UAV 11.

[0024] The corners of the surveying and mapping UAV 11 are respectively equipped with arms 14, and a rotor body 15 is installed at the end of each arm 14. A mounting part 12 is installed at the belly of the surveying and mapping UAV 11. A control and rolling mechanism 3 is arranged on one of the rotor bodies 15. The control and rolling mechanism 3 includes a thrust cylinder 31. The rotating column of the rotor body 15 passes through the thrust cylinder 31. A telescopic column 303 is penetrated inside the upper wall of the thrust cylinder 31. A magnetic block 302 is fixedly embedded on the bottom wall of the telescopic column 303. A blocking plate 5 is fixedly arranged on one side of the rotating column of the rotor body 15. In the initial state, the telescopic column 303 does not contact the blocking plate 5.

[0025] like Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, a swivel ring 304 is rotatably embedded on the outer wall of the thrust cylinder 31, and a rotating plate 37 rotatably connected to the thrust cylinder 31 is fixedly arranged on the inner side of the rotating ring 304. A plurality of magnetic balls 38 are rotatably arranged inside the rotating plate 37, and the magnetic balls 38 are divided into magnetic and non-magnetic parts. A ball-shifting column 301 is arranged below the magnetic balls 38, and a fixing ring 39 is fixedly arranged below the ball-shifting column 301, and the fixing ring 39 is fixedly connected to the rotor body 15.

[0026] like Figure 7 , Figure 8 and Fig. 9 As shown, a take-up wheel 32 is fixedly provided below the pushed cylinder 31, a reciprocating belt 34 is fixedly provided between the take-up wheels 32, an assembly block 35 is fixedly provided at one end of the reciprocating belt 34 away from the take-up wheel 32, the assembly block 35 is slidably connected to the arm 14, and an elastic belt 36 is fixedly provided on the side of the assembly block 35 away from the reciprocating belt 34.

[0027] A side box 41 is fixedly provided on the side wall of the surveying and mapping camera 13. A reduction gear group 45 composed of multiple groups of gears and pulleys is rotatably provided inside the side box 41, and the connection between the gears and the pulleys is a ratchet connection. A connecting rope 43 is wound around the energy supply end of the reduction gear group 45, and the end of the connecting rope 43 away from the reduction gear group 45 is connected to the assembly block 35. A transmission belt 46 is provided at the end of the reduction gear group 45 away from the energy supply. An electromagnet 44 fixedly connected to the side box 41 is provided on one side of the reduction gear group 45, and a pulling wire 33 is fixedly connected to the telescopic arm of the electromagnet 44, and the end of the pulling wire 33 away from the electromagnet 44 is fixedly connected to the swivel 304.

[0028] The film unwinding part also includes an unwinding drum 23. The protective films released from the unwinding drum 21 and the unwinding drum 23 are respectively the first protective film 25 and the second protective film 26. The winding drum 22 is internally rotated with two mounting posts 204. Both mounting posts 204 are engaged with film winding drums 201, and the two film winding drums 201 respectively wind up the first protective film 25 and the second protective film 26.

[0029] A gear rotatably connected to the winding drum 22 is fixedly disposed on one end of the two mounting posts 204 close to the side box 41 , and a toothed disc 202 rotatably connected to the winding drum 22 is meshed between the two pinions.

[0030] like Figure 8 , Fig. 9 and Fig.10 As shown, a film buffer arm 1 24 is fixedly provided on one side of the film collection tube 201 close to the winding opening of the second protective film 26 , and a film buffer arm 27 and a humidity sensor 28 are respectively provided on both sides of the film collection tube 201 close to the winding opening of the first protective film 25 .

[0031] The unwinding drum 21 is provided with a film roll 29 for rotation inside, and the unused first protective film 25 is wound on the film roll 29. The unwinding drum 23 is provided with a film roll 203 for rotation inside, and the unused second protective film 26 is wound on the unwinding drum 23. During the flight, the surveying camera 13 will continuously capture image data of the building. These data usually include images of multiple viewing angles and angles of the building for subsequent three-dimensional reconstruction and deformation analysis. The collected image data will be transmitted to the onboard computer or ground station for further processing. These processes include image registration, feature extraction, three-dimensional reconstruction and other steps, and finally generate a three-dimensional model or deformation analysis report of the building. Through the image recognition algorithm, the feature points or identification points of the building can be identified from the images captured by the drone, and then, the deformation of the building can be calculated using the matching relationship between these feature points or identification points in different images.

[0032] The camera carried by the surveying and mapping drone 11 obtains images of the target area by shooting horizontally or at other angles. Through professional image processing software, feature points can be extracted from the images. These feature points are significant landmarks on the ground or artificially set landmarks. Combined with the spatial coordinate information of the ground control points, the three-dimensional coordinates of each feature point can be calculated using the triangulation principle or other related algorithms. These coordinate information constitutes a three-dimensional model of the ground. The laser radar system of the surveying camera 13 generates a laser beam through a laser and emits a pulse to the target. When the laser beam meets the target, it will be reflected. The reflected laser signal will be received by the optical receiver of the laser radar. By measuring the time difference from the emission to the reception of the laser pulse and combining it with physical parameters such as the speed of light, the distance of the target can be calculated. The received reflected signal will be processed through amplification, digitization and other processing steps to extract information such as the distance, speed, and direction of the target; In the surveying of the surveying drone 11, the image capture system and radar system of the surveying camera 13 usually do not work in isolation, but complement and cooperate with each other. The image capture system can provide rich surface image information, while the radar system can provide high-precision distance and three-dimensional coordinate information. By fusing these two types of data, a more accurate and complete surface model and map can be generated.

[0033] The humidity sensor 28 monitors the humidity changes on the surface of the protective film in real time. Once the humidity abnormality is found, it is converted into a corresponding electrical signal output and an early warning signal is immediately issued. The early warning signal can be linked with the radar mapping system to suspend or adjust the mapping operation. According to the data fed back by the humidity sensor 28, the lens parameters or mapping strategy of the mapping camera 13 can be adjusted to adapt to different humidity environments. The data of the humidity sensor 28 is combined with the radar mapping data for comprehensive analysis to evaluate the impact of humidity on mapping accuracy, which helps to formulate more accurate mapping error correction methods and improve the accuracy of building deformation detection.

[0034] By timely rolling up and replacing the first protective film 25 through the winding piece, it can be ensured that the radar mapping part is always in the best working state. The first protective film 25 can effectively prevent the radar mapping part from being polluted and damaged by the external environment such as moisture, dust, dirt, etc., thereby ensuring that the radar can work continuously and stably and improving the accuracy and reliability of the data; The first protective film 25 and the second protective film 26 are automatically rolled up by the rolling control mechanism 3. The operator can flexibly adjust the covering state of the protective film according to the actual picture effect, effectively protecting the lens of the surveying and mapping camera 13, extending its service life, and reducing the phenomenon of blurred shooting pictures caused by lens contamination.

[0035] First, the operator controls the remote control on the ground to control the surveying and mapping UAV 11 to fly to a high altitude, and uses the surveying and mapping camera 13 to perform surveying and mapping. When the surveying and mapping UAV 11 flies to a specified altitude, if the air humidity in the high altitude is high, the panel of the surveying and mapping camera 13 may fog or have water droplets on it. At this time, the operator controls the electromagnet 44 to work through the controller, pulls the pulling wire 33 through the telescopic arm of the electromagnet 44, pulls the rotating ring 304 to rotate 30° through the pulling wire 33, and drives the rotating plate 37 to rotate 30° through the rotating ring 304. At the same time, when the rotating plate 37 rotates, the magnetic ball 38 passes by the ball-moving column 301, and the magnetic ball 38 is rotated by the ball-moving column 301, so that the magnetic side of the magnetic ball 38 faces upward, and the repulsive force of the magnetic ball 38 on the magnetic block 302 is used to push the telescopic column 303 to extend upward. At this time, when the propeller of the rotor body 15 rotates, it drives the blocking plate 5 to rotate, and pushes the telescopic column 303 through the blocking plate 5, and drives the push cylinder 31 to rotate through the telescopic column 303, and drives the reel 32 to rotate through the push cylinder 31 to reel the reciprocating belt 34, so that the reciprocating belt 34 pulls the assembly block 35 to slide; When the working time of the electromagnet 44 is reached, the assembly block 35 is reset by the elastic pull of the elastic band 36 to achieve the effect of reuse.

[0036] When the assembly block 35 is pulled to slide by the reciprocating belt 34, the connecting rope 43 is pulled at the same time. As the connecting rope 43 is stretched, the reduction gear set 45 is driven to rotate, and the transmission belt 46 is driven to rotate through the reduction gear set 45; The reduction gear set 45 can be combined at will according to the needs. In addition, the connection between the gear and the pulley is a ratchet connection, so that the reduction gear set 45 can only rotate in one direction, and a torsion spring is arranged inside the pulley connected to the connecting rope 43, so that the connecting rope 43 can be rewound.

[0037] The transmission belt 46 drives the toothed disc 1 202 to rotate, the toothed disc 1 202 drives the two mounting posts 204 to rotate, and the mounting posts 204 drive the two film collection cylinders 201 to rotate, and at the same time, the first protective film 25 and the second protective film 26 are rolled up, so that the radar lens surface and the camera lens surface are protected by the first protective film 25 and the second protective film 26, so that the unused first protective film 25 and the second protective film 26 can protect the radar lens surface and the camera lens surface again, and as the first protective film 25 and the second protective film 26 are rolled up, the unused first protective film 25 and the second protective film 26 are pulled out from the film roll cylinder 1 29 and the film roll cylinder 2 203, so that the clean first protective film 25 and the second protective film 26 cover the radar lens surface and the camera lens surface; When the first protective film 25 is rolled up by the film-winding cylinder 201, the outer surface of the first protective film 25 contacts the humidity sensor 28, so that the water droplets on the first protective film 25 rub against the humidity sensor 28, and the data collected by the humidity sensor 28 is combined with the radar mapping data; The staff can replace the film roll one 29 and the film roll two 203 before using the surveying and mapping drone 11, and replace the new first protective film 25 and the second protective film 26.

[0038] The above describes an embodiment of the present embodiment, but the present embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present embodiment, ordinary technicians in this field can also make many forms, all of which are within the protection of the present embodiment.

Claims

1. A building deformation detection device based on drone vision, comprising a surveying drone (11), wherein a surveying camera (13) is installed on the belly of the surveying drone (11), wherein the surveying surface of the surveying camera (13) is divided into two parts: a radar surveying surface and an image taking surface, and wherein: The surveying and mapping surface of the surveying and mapping camera (13) is provided with a stage surface clearing mechanism (2) for dynamically managing the surveying and mapping surface of the surveying and mapping camera (13); The stage surface cleaning mechanism (2) comprises a protective film, a film unwinding member and a winding member, the film unwinding member comprises a winding drum (21) with a built-in protective film, the film outlet of the winding drum (21) being recessed in the radar mapping surface of the mapping camera (13), the winding member comprises a winding drum (22), the winding drum (22) having a built-in film collecting drum (201) for collecting used protective films, a second film buffering arm (27) being fixedly provided on one side of the film inlet of the winding drum (22) and being installed on the opposite side of the air contact surface, a humidity sensor (28) being fixedly provided on the side of the film inlet of the winding drum (22) away from the second film buffering arm (27) and directly facing the air contact surface of the protective film.

2. A building deformation detection device based on drone vision according to claim 1, characterized in that: The surveying and mapping unmanned aerial vehicle (11) comprises a parking platform (6), wherein the parking platform (6) is set up at a preset shooting point of the surveying and mapping camera (13). The surveying and mapping unmanned aerial vehicle (11) flies to the parking platform (6) at the first surveying and mapping point, adjusts the angle of the surveying and mapping camera (13) to be the same as the first surveying and mapping angle, and then surveys and maps the designated building.

3. The building deformation detection device based on drone vision according to claim 2 is characterized in that: The corners of the surveying and mapping UAV (11) are respectively equipped with arms (14), the end of each arm (14) is equipped with a rotor body (15), the belly of the surveying and mapping UAV (11) is equipped with a mounting member (12), one of the rotor bodies (15) is provided with a control roll mechanism (3), the control roll mechanism (3) comprises a thrust receiving cylinder (31), a rotating column of the rotor body (15) passes through the thrust receiving cylinder (31), a telescopic column (303) is penetrated inside the upper wall of the thrust receiving cylinder (31), a magnetic block (302) is fixedly embedded in the bottom wall of the telescopic column (303), a blocking plate (5) is fixedly provided on one side of the rotating column of the rotor body (15), and the telescopic column (303) is not in contact with the blocking plate (5) in an initial state.

4. The building deformation detection device based on drone vision according to claim 3 is characterized in that: The outer wall of the thrust receiving cylinder (31) is rotatably inlaid with a rotating ring (304), the inner side of the rotating ring (304) is fixedly provided with a rotating follower plate (37) rotatably connected to the thrust receiving cylinder (31), a plurality of magnetic balls (38) are rotatably provided inside the rotating follower plate (37), and the magnetic balls (38) are divided into two parts, magnetic and non-magnetic, a ball-moving column (301) is provided below the magnetic balls (38), a fixing ring (39) is fixedly provided below the ball-moving column (301), and the fixing ring (39) is fixedly connected to the rotor body (15).

5. The building deformation detection device based on drone vision according to claim 4 is characterized in that: A belt reel (32) is fixedly arranged below the pushed cylinder (31), a reciprocating belt (34) is fixedly arranged between the belt reel wheels (32), an assembly block (35) is fixedly arranged at one end of the reciprocating belt (34) away from the belt reel wheel (32), the assembly block (35) is slidably connected to the machine arm (14), and an elastic belt (36) is fixedly arranged at one side of the assembly block (35) away from the reciprocating belt (34).

6. The building deformation detection device based on drone vision according to claim 5 is characterized in that: A side box (41) is fixedly provided on the side wall of the surveying and mapping camera (13); a reduction gear set (45) composed of a plurality of gears and pulleys is rotatably provided inside the side box (41); the gears and pulleys are connected by ratchet connection; a connecting rope (43) is wound around one end of the reduction gear set (45) for power supply; the end of the connecting rope (43) away from the reduction gear set (45) is connected to an assembly block (35); a transmission belt (46) is provided at the end of the reduction gear set (45) away from the power supply; an electromagnet (44) fixedly connected to the side box (41) is provided on one side of the reduction gear set (45); a pulling wire (33) is fixedly connected to the telescopic arm of the electromagnet (44); and the end of the pulling wire (33) away from the electromagnet (44) is fixedly connected to a rotating ring (304).

7. The building deformation detection device based on drone vision according to claim 2 is characterized in that: The film unwinding member also includes a second unwinding drum (23), and the protective films released from the first unwinding drum (21) and the second unwinding drum (23) are respectively a first protective film (25) and a second protective film (26). The winding drum (22) is internally rotatably provided with two mounting posts (204), and both mounting posts (204) are provided with film winding drums (201) engaged thereon, and the two film winding drums (201) are used to wind up the first protective film (25) and the second protective film (26) respectively.

8. The building deformation detection device based on drone vision according to claim 7 is characterized in that: A pinion gear rotatably connected to the winding drum (22) is fixedly disposed at one end of the two mounting posts (204) close to the side box (41), and a toothed disc 1 (202) rotatably connected to the winding drum (22) is meshed between the two pinion gears.

9. The building deformation detection device based on drone vision according to claim 8, characterized in that: A first film buffer arm (24) is fixedly provided on one side of the film collecting cylinder (201) close to the winding opening of the second protective film (26), and the second film buffer arm (27) and the humidity sensor (28) are respectively provided on both sides of the film collecting cylinder (201) close to the winding opening of the first protective film (25).

10. The building deformation detection device based on drone vision according to claim 9, characterized in that: The first unwinding drum (21) is internally provided with a first film roll (29) for rotation, and an unused first protective film (25) is wound around the first film roll (29); the second unwinding drum (23) is internally provided with a second film roll (203) for rotation, and an unused second protective film (26) is wound around the second unwinding drum (23).

Images