Three-Dimensional Model Reconstruction and Damage Assessment Method for Wide-Area Scenes Based on Remote Sensing Data

Abstract

The present invention belongs to the field of remote sensing technology, and specifically relates to a method for reconstructing a three-dimensional model of a wide-area scene and damage assessment based on remote sensing data, including the following steps: A1. When building a three-dimensional model of the houses in a scene of a region, the remote sensing information of the three-dimensional scene can be detected in advance by a drone to obtain the images and three-dimensional information of the houses in the region; through the water-cooled copper tubes installed on the side walls on both sides of the drone body, during the normal use of the drone body, the water-cooled copper tubes can be displaced outward by the pulling of the counterweight balls, so that the water-cooled copper tubes exchange the high temperature generated inside the heat dissipation chamber with the outside, increasing the heat exchange effect inside the heat dissipation chamber, reducing the crash of the drone body caused by high temperature. At the same time, the moving effect of the water-cooled copper tubes can cause the water-cooled copper tubes to retract when the drone body lands and is stored, reducing the obstruction to the drone operator.

Description

Technical Field

[0001] The present invention belongs to the technical field of remote sensing, and specifically relates to a method for reconstructing a three-dimensional model of a wide-area scene based on remote sensing data and damage assessment. Background Art

[0002] Remote sensing image data is a digital image in modern society. It uses a photographic method to scan and process the images of a certain area, thereby obtaining geographical data for subsequent monitoring and management of resources. In urban planning, through remote sensing image data, it is convenient for staff to provide basic data support for urban construction based on information such as topography, building layout, and transportation network.

[0003] The basic sources of remote sensing image data are satellite platforms and aerial platforms. The regional remote sensing data is scanned through high-altitude photography. Among them, unmanned aerial vehicle (UAV) photography can take advantage of its small size to take off and land quickly, and is suitable for obtaining remote sensing data with a small range and high resolution.

[0004] In the prior art, during the process of a UAV obtaining regional remote sensing data, the interior of the UAV is often in a sealed state to prevent sand and other particulate matter from entering. At the same time, during the shooting process, a large amount of heat is generated during the processor's image processing. As a result, after long-term use, heat accumulates inside the UAV, leading to equipment crashes.

[0005] Therefore, the present invention provides a method for reconstructing a three-dimensional model of a wide-area scene based on remote sensing data and damage assessment. Summary of the Invention

[0006] In order to make up for the deficiencies of the prior art and solve at least one of the technical problems proposed in the background art.

[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: The method for reconstructing a three-dimensional model of a wide-area scene based on remote sensing data and damage assessment according to the present invention, the method for reconstructing and evaluating a three-dimensional model of a wide-area scene based on remote sensing data, and the method for reconstructing and evaluating a three-dimensional model of a wide-area scene based on remote sensing data include the following steps:

[0008] A1. When building a three-dimensional model of the houses in a scene of a region, the UAV can first be used to detect the remote sensing information of the three-dimensional scene to obtain the images and three-dimensional information of the houses in the region;

[0009] A2. When building a building model, the scene information obtained by UAV survey can be used to reconstruct the model of the building according to the three-dimensional information of the building. Subsequently, texture mapping and fitting can be performed on the completed model through the image information.

[0010] A3. After the model of the three-dimensional scene is made, the staff can intuitively plan the urban buildings through the three-dimensional model scene of the area. At the same time, after a geological disaster occurs, the three-dimensional model can assist the municipal construction to rebuild it.

[0011] A method for damage assessment of a wide-area scene three-dimensional model based on remote sensing data, characterized in that: this assessment method is applicable to the above-mentioned method for reconstructing and evaluating a wide-area scene three-dimensional model based on remote sensing data, and includes the following steps:

[0012] S1. When the buildings in an area are damaged, the staff can use a surveying and mapping drone to scan the three-dimensional models of the buildings in the area, so as to obtain the remote sensing data of the buildings in the area;

[0013] S2. After obtaining the data of the damaged buildings in the area, reconstruct the three-dimensional model through three-dimensional data and textures. Subsequently, by comparing the reconstructed three-dimensional model with the three-dimensional model before damage, damage data can be obtained;

[0014] S3. After comparing the two groups of three-dimensional models, a basic building damage report can be obtained, so as to assist the construction personnel to repair or reconstruct the building.

[0015] Preferably, the three-dimensional reconstruction model and the three-dimensional model before damage can be overlapped and compared in three-dimensional software. Through the comparison results, the basic damaged area can be obtained. At the same time, based on the three-dimensional model before damage, the surrounding environment can be observed to determine whether there are dangerous goods near the damaged building, providing basic data support for on-site rescue personnel and reconstruction personnel

[0016] Preferably, the surveying and mapping drone in S1 includes a drone body; a heat dissipation chamber is provided inside the drone body; water-cooled copper tubes are slidably connected to both sides of the drone body; the ends of the water-cooled copper tubes slide inside the heat dissipation chamber; a first fixed column is fixedly connected inside the heat dissipation chamber; a roller is rotatably connected to the middle of the first fixed column at the middle of the water-cooled copper tube; a pull rope is wound around the middle of the water-cooled copper tube; the end of the pull rope passes around the roller and then passes through the bottom of the drone body, and a counterweight ball is fixedly connected to the bottom.

[0017] Preferably, a second fixed column is fixedly connected to the middle of the heat dissipation chamber; a limiting cylinder is fixedly connected to the middle of the second fixed column; an elastic rope is provided inside the limiting cylinder; the end of the elastic rope is fixedly connected to the middle of the water-cooled copper tube; a plurality of groups of first collision columns are fixedly connected to the side wall of the limiting cylinder; a plurality of groups of rubber rods are fixedly connected to the side wall of the elastic rope; a collision ball is fixedly connected to the end of the rubber rod; the collision ball is in contact with the side wall of the first collision column.

[0018] Preferably, a pair of air bags are fixedly connected to the inside of the elastic rope at the central position; a first limiting block is fixedly connected to the side wall of the elastic rope; a gas guide pipe is fixedly connected to the side wall of the first limiting block, and the other end of the gas guide pipe is communicated with the air bag.

[0019] Preferably, side plates are fixedly connected to both sides of the UAV body; a space communicated with the heat dissipation chamber is opened inside the side plates, and a water-cooled copper pipe slides inside the side plates; a first sliding groove is opened in the side plates at the position where the water-cooled copper pipe is located; a first rotating shaft is hinged to the side wall of the first sliding groove through a torsion spring; second limiting blocks are fixedly connected to both sides of the first rotating shaft in the up-and-down direction, and the side walls of the second limiting blocks are in contact with the side wall of the water-cooled copper pipe; a plurality of rubber columns are fixedly connected to the contact surface between the second limiting blocks and the water-cooled copper pipe; a second collision column is fixedly connected to the side wall of the second limiting block.

[0020] Preferably, a positioning cylinder is slidably connected inside the water-cooled copper pipe; a plurality of rollers are rotatably connected to the side wall of the positioning cylinder, and all of them are in contact with the side wall of the water-cooled copper pipe; a fan blade is installed inside the positioning cylinder; first magnets are fixedly connected to the outer side walls of the positioning cylinder; second magnets are fixedly connected to both sides of the first sliding groove inside the side plates, and the first magnets and the second magnets attract each other magnetically.

[0021] Preferably, a second rotating shaft is hinged to the inside of the positioning cylinder in the water flow direction through a torsion spring; a shaking plate is fixedly connected to the side wall of the second rotating shaft, and the end of the shaking plate is triangularly arranged.

[0022] Preferably, protective shells are provided on both side walls of the UAV body, and the bottom of the protective shell is hollow; a pair of pins are fixedly connected to the side wall of the protective shell; grooves with the same shape are opened at the top of the side plates at the same position as the pins; a plurality of flow guide plates are installed around the protective shell.

[0023] The beneficial effects of the present invention are as follows:

[0024] 1. For the method for reconstructing a three-dimensional model of a wide-area scene and damage assessment based on remote sensing data of the present invention, through the water-cooled copper pipes installed on both side walls of the UAV body, during the normal use of the UAV body, the water-cooled copper pipes can be displaced outward by the pulling of the counterweight balls, so that the water-cooled copper pipes exchange the high temperature inside the heat dissipation chamber with the outside, increasing the heat exchange effect inside the heat dissipation chamber and reducing the deadlock of the UAV body caused by high temperature. At the same time, the moving effect of the water-cooled copper pipes can make the water-cooled copper pipes retract when the UAV body lands and is stored, reducing the obstruction to the drone pilot.

[0025] 2. The 3D model reconstruction and damage assessment method for wide-area scenes based on remote sensing data according to the present invention can drive the middle part of the elastic rope to contract through the pulling effect of the water-cooled copper tube, causing the rubber rod to rotate towards the middle part of the elastic rope. When the elastic rope returns to its original position, it drives the collision ball to collide with the side wall of the first collision column, and reduces the coverage of dust and impurities on the water-cooled copper tube through the vibration effect. Brief Description of the Drawings

[0026] The present invention will be further described below in conjunction with the drawings.

[0027] Figure 1 is the flowchart of the reconstruction and assessment method in the present invention;

[0028] Figure 2 is the flowchart of the damage assessment method in the present invention;

[0029] Figure 3 is the perspective view in the present invention;

[0030] Figure 4 is the perspective view of the water-cooled copper tube in the present invention;

[0031] Figure 5 is the schematic diagram of the internal structure of the UAV body in the present invention;

[0032] Figure 6 is the schematic diagram of the structure of the water-cooled copper tube in the present invention;

[0033] Figure 7 is the schematic diagram of the structure of the positioning cylinder in the present invention.

[0034] In the figure: 1. UAV body; 11. Heat dissipation chamber; 12. Water-cooled copper tube; 13. First fixed column; 14. Roller; 15. Pulling rope; 16. Counterweight ball; 2. Limit cylinder; 21. Second fixed column; 22. Elastic rope; 23. First collision column; 24. Rubber rod; 25. Collision ball; 3. Airbag; 31. First limit block; 32. Air guide tube; 4. Side plate; 41. First chute; 42. First rotating shaft; 43. Second limit block; 44. Second collision column; 5. Positioning cylinder; 51. Fan blade; 52. First magnet; 53. Second magnet; 6. Second rotating shaft; 61. Jitter plate; 7. Protective shell; 71. Plug; 72. Flow guide plate. Detailed Embodiments

[0035] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0036] As Figures 1 to 7As shown in the figure, the method for evaluating the three-dimensional model reconstruction of a wide-area scene based on remote sensing data according to the embodiment of the present invention includes the following steps:

[0037] A1. When building a three-dimensional model of the houses in the scene of a region, the remote sensing information of the three-dimensional scene can be detected by a drone in advance to obtain the images and three-dimensional information of the houses in the region;

[0038] A2. When building a building model, the scene information obtained by the drone survey can be used to reconstruct the model of the building according to the three-dimensional information of the building. Subsequently, texture mapping and fitting can be performed on the completed model through the image information;

[0039] A3. After the production of the three-dimensional scene model is completed, the staff can intuitively plan the urban buildings through the three-dimensional model scene of the region. At the same time, after a geological disaster occurs, the three-dimensional model can be used to assist the municipal construction for reconstruction.

[0040] The method for evaluating the damage of the three-dimensional model of the wide-area scene based on remote sensing data is characterized in that: this evaluation method is applicable to the method for evaluating the three-dimensional model reconstruction of the wide-area scene based on remote sensing data described above, and includes the following steps:

[0041] S1. When the buildings in a region are damaged, the staff can use a surveying drone to scan the three-dimensional models of the buildings in the region to obtain the remote sensing data of the buildings in the region;

[0042] S2. After obtaining the data of the damaged buildings in the region, the three-dimensional model is reconstructed through the three-dimensional data and texture mapping. Subsequently, by comparing the reconstructed three-dimensional model with the three-dimensional model before damage, damage data can be obtained;

[0043] S3. After comparing the two groups of three-dimensional models, a basic building damage report can be obtained, so as to assist the construction personnel in repairing or reconstructing the building.

[0044] The above three-dimensional reconstruction model and the three-dimensional model before damage can be overlapped and compared in three-dimensional software. The basic damaged area can be obtained through the comparison results. At the same time, the surrounding environment can be observed according to the three-dimensional model before damage to determine whether there are dangerous goods near the damaged building, providing basic data support for the on-site rescue personnel and reconstruction personnel.

[0045] The mapping UAV in the above S1 includes a UAV body 1; a heat dissipation chamber 11 is provided inside the UAV body 1; water-cooled copper tubes 12 are slidably connected to both sides of the UAV body 1; the ends of the water-cooled copper tubes 12 slide inside the heat dissipation chamber 11; a first fixing column 13 is fixedly connected inside the heat dissipation chamber 11; a roller 14 is rotatably connected to the middle of the first fixing column 13 at the middle of the water-cooled copper tube 12; a pull rope 15 is wound around the middle of the water-cooled copper tube 12; the end of the pull rope 15 passes around the roller 14 and then passes through the bottom of the UAV body 1, and a counterweight ball 16 is fixedly connected to the bottom; during the mapping process of the UAV body 1, as the shooting time increases, the temperature inside the UAV body will gradually rise. At this time, the water-cooled copper tubes 12 installed on both sides of the UAV body 1 can utilize their good heat absorption effect to diffuse the heat to the external air through the water-cooled copper tubes 12. At the same time, after the UAV body 1 takes off, the counterweight ball 16 will fall by itself due to the loss of the supporting effect at the bottom, generating a downward pulling effect, driving the pull rope 15 in the middle of the water-cooled copper tube 12 to be pulled, causing the water-cooled copper tube 12 to displace, so that the area of the water-cooled copper tube 12 outside the UAV body 1 increases, and it cooperates with the airflow generated by the fan blades of the UAV body 1 to dissipate heat quickly. Through the water-cooled copper tubes 12 installed on the side walls of both sides of the UAV body 1, during the normal use of the UAV body 1, the water-cooled copper tube 12 can be displaced outward by the pulling of the counterweight ball 16, so that the water-cooled copper tube 12 exchanges the high temperature inside the heat dissipation chamber 11 with the outside, increasing the heat exchange effect inside the heat dissipation chamber 11, reducing the crash of the UAV body 1 caused by high temperature. At the same time, the moving effect of the water-cooled copper tube 12 can retract the water-cooled copper tube 12 when the UAV body 1 lands and is stored, reducing the obstruction to the operator.

[0046] A second fixing column 21 is fixedly connected to the middle of the above-mentioned heat dissipation bin 11; a limiting cylinder 2 is fixedly connected to the middle of the second fixing column 21; an elastic cord 22 is arranged inside the limiting cylinder 2; the end of the elastic cord 22 is fixedly connected to the middle of the water-cooled copper pipe 12; multiple groups of first collision columns 23 are fixedly connected to the side wall of the limiting cylinder 2; multiple groups of rubber rods 24 are fixedly connected to the side wall of the elastic cord 22; a collision ball 25 is fixedly connected to the end of the rubber rod 24; the side wall of the collision ball 25 is in contact with the side wall of the first collision column 23; during the displacement of the water-cooled copper pipe 12, the elastic cord 22 will be subjected to a pulling effect. Under the influence of the pulling force, the middle of the elastic cord 22 will gradually deform and contract, causing the rubber rod 24 to tilt towards the middle. When the UAV body 1 lands for battery replacement or storage, the water-cooled copper pipe 12 is reset under the pulling force of the elastic cord 22, and the rubber rod 24 will drive the collision ball 25 to impact the side wall of the first collision column 23, generating vibration. Through the pulling effect of the water-cooled copper pipe 12, the middle of the elastic cord 22 can be driven to contract, causing the rubber rod 24 to rotate towards the middle of the elastic cord 22. Subsequently, when the elastic cord 22 resets, it drives the collision ball 25 to collide with the side wall of the first collision column 23, and the dust and impurities on the water-cooled copper pipe 12 are reduced by the vibration effect.

[0047] A pair of air bags 3 are fixedly connected to the center position inside the above-mentioned elastic cord 22; a first limiting block 31 is fixedly connected to the side wall of the elastic cord 22; a gas guide pipe 32 is fixedly connected to the side wall of the first limiting block 31, and the other end of the gas guide pipe 32 is communicated with the air bag 3; during the displacement of the water-cooled copper pipe 12, with the stretching effect generated by the elastic cord 22, the middle of the elastic cord 22 will gradually contract and generate a squeezing effect on the air bag 3. At the same time, due to the contraction and stretching of the air bag 3, the rubber rod 24 will gradually approach the air bag 3 until it fits. After the internal gas of the air bag 3 is discharged, an adsorption effect will be generated to secondarily fix the collision ball 25. Through the stretching effect of the elastic cord 22, the air bag 3 can be driven to generate extrusion, so that the fixing effect is increased after the collision ball 25 contacts the first limiting block 31, and the energy storage provided for the reset of the rubber rod 24 is reduced.

[0048] The above-mentioned drone body 1 is fixedly connected to side panels 4 on both sides; a space is opened inside the side panel 4 that communicates with the heat dissipation compartment 11, and the water-cooling copper tube 12 slides inside the side panel 4; the above-mentioned side panel 4 is provided with a No. 1 slide groove 41 at the position where the water-cooling copper tube 12 is located; the side wall of the No. 1 slide groove 41 is hinged to the No. 1 rotating shaft 42 by a torsion spring; the No. 2 limit blocks 43 are fixedly connected to the upper and lower sides of the above-mentioned rotating shaft 42, and the side walls of the No. 2 limit blocks 43 are in contact with the side walls of the water-cooling copper tube 12; the contact surfaces of the No. 2 limit blocks 43 and the water-cooling copper tube 12 are fixedly connected with multiple groups of rubber columns; the side walls of the No. 2 limit blocks 43 are fixedly connected with the No. 2 collision columns 44; in the process of displacement of the water-cooling copper tube 12 During the movement, the No. 2 limit block 43 will gradually increase the friction with the water-cooled copper tube 12 under the action of its own rubber column, so that the No. 2 limit block 43 will produce an inclined angle along the moving angle of the water-cooled copper tube 12, causing the No. 2 collision column 44 to break away from the contact with the water-cooled copper tube 12. Then, when the friction force is greater than the blocking effect of the No. 2 limit block 43, the No. 2 limit block 43 will be reset, driving the No. 2 collision column 44 to collide with the side wall of the water-cooled copper tube 12. Through the multiple groups of No. 2 limit blocks 43 installed inside the No. 1 slide groove 41, the No. 2 limit block 43 can be driven to continuously produce a shaking effect on the side wall of the water-cooled copper tube 12 during the movement of the water-cooled copper tube 12, so that the No. 2 collision column 44 continuously collides with the side wall of the water-cooled copper tube 12, driving the water-cooled copper tube 12 itself to vibrate, causing dust on the surface of the water-cooled copper tube 12 in the air to fall, reducing impurity coverage and improving the heat dissipation effect.

[0049] A positioning cylinder 5 is slidably connected inside the above-mentioned water-cooled copper tube 12; a plurality of groups of rollers are rotatably connected to the side wall of the positioning cylinder 5 and are all in contact with the side wall of the water-cooled copper tube 12; a fan blade 51 is installed inside the positioning cylinder 5; a first magnet 52 is fixedly connected to the outer side wall of the positioning cylinder 5; on both sides of the first sliding groove 41 inside the side plate 4, a second magnet 53 is fixedly connected, and the first magnet 52 and the second magnet 53 attract each other magnetically; during the shooting process of the UAV body 1, due to the need for battery replacement during its own operation, the UAV body 1 needs to take off and land back and forth. At this time, as the UAV body 1 rises and falls, the water-cooled copper tube 12 can be displaced back and forth under the influence of the counterweight ball 16. When the water-cooled copper tube 12 moves, the positioning cylinder 5 is displaced to the position where the first sliding groove 41 is located. Through the magnetic attraction effect of the first magnet 52 and the second magnet 53, the position of the positioning cylinder 5 itself is kept unchanged during the movement of the water-cooled copper tube 12, so that the liquid inside the water-cooled copper tube 12 rotates after passing through the fan blade 51, increasing the flow effect and mixing of the water flow. By installing the positioning cylinder 5 inside the water-cooled copper tube 12, during the movement of the water-cooled copper tube 12, the rotation effect of the copper hot pot fan blade 51 can be achieved, increasing the mixing speed of the water flow, thereby keeping the water temperature inside the water-cooled copper tube 12 in a consistent state, increasing the water flow velocity at the same time, and further increasing the heat dissipation effect of the water-cooled copper tube 12.

[0050] A second rotating shaft 6 is hinged inside the positioning cylinder 5 in the water flow direction through a torsion spring; a shaking plate 61 is fixedly connected to the side wall of the second rotating shaft 6, and the end of the shaking plate 61 is triangularly arranged; during the movement of the water-cooled copper tube 12, due to the influence of magnetic adsorption on the positioning cylinder 5, the water-cooled copper tube 12 and the positioning cylinder 5 will be in a relative movement state. At this time, the water flow will fluctuate after passing through the fan blade 51, and the fluctuating water flow will directly contact the shaking plate 61, causing the shaking plate 61 to swing up and down, increasing the shaking amplitude of the subsequent water flow. Through the direct contact between multiple groups of shaking plates 61 and the water flow, the mixing speed of the water flow can be increased, the water flow temperature inside the water-cooled copper tube 12 can be increased and dissipated outward, and further the temperature rise inside the heat dissipation bin 11 can be reduced.

[0051] Both side walls of the above-mentioned drone body 1 are provided with protective shells 7, and the bottom of the protective shell 7 is hollow; a pair of pins 71 are fixedly connected to the side wall of the above-mentioned protective shell 7; grooves with the same shape are opened at the top of the above-mentioned side plate 4 at the same position as the pins 71; a plurality of groups of flow guiding plates 72 are installed around the above-mentioned protective shell 7; during the process of the drone body 1 taking off and shooting buildings in a specified area, the protective shells 7 installed on both side walls of the drone body 1 can protect the water-cooled copper tubes 12, keep the water-cooled copper tubes 12 in a safe state in the air, and reduce the direct contact with impurities. Through the installation effect of the protective shell 7, during the flight of the drone body 1, in the face of emergencies such as hail and branches, the water-cooled copper tubes 12 can be protected to reduce deformation and breakage caused by direct contact.

[0052] During the working process, during the mapping process of the drone body 1, as the shooting time increases, the temperature inside the drone body will gradually rise. At this time, the water-cooled copper tubes 12 installed on both sides of the drone body 1 can utilize their good heat absorption effect to make the heat diffuse from the water-cooled copper tubes 12 to the external air. At the same time, after the drone body 1 takes off, due to the loss of the supporting effect at the bottom of the counterweight ball 16, it will fall by itself, generating a downward pulling effect, driving the pulling rope 15 in the middle of the water-cooled copper tube 12 to be pulled, causing the water-cooled copper tube 12 to displace, so that the area of the water-cooled copper tube 12 outside the drone body 1 itself increases, and it cooperates with the airflow generated by the fan blades of the drone body 1 to dissipate heat quickly. During the displacement of the water-cooled copper tube 12, the elastic cord 22 will be subjected to a pulling effect. Under the influence of the pulling force, the middle part of the elastic cord 22 will gradually deform and contract, causing the rubber rod 24 to tilt towards the middle. When the drone body 1 lands for battery replacement or storage, the water-cooled copper tube 12 will reset under the pulling force of the elastic cord 22, and the rubber rod 24 will drive the collision ball 25 to impact the side wall of the first collision column 23, generating vibration.

[0053] During the displacement of the water-cooled copper tube 12, with the stretching effect generated by the elastic cord 22, the middle part of the elastic cord 22 will gradually contract to produce a squeezing effect on the airbag 3. At the same time, due to the contraction of the airbag 3, the rubber rod 24 will gradually approach the airbag 3 until it fits. After the internal gas of the airbag 3 is discharged, an adsorption effect will be generated to secondarily fix the collision ball 25. During the displacement of the water-cooled copper tube 12, the first rotating shaft 42 installed inside the first chute 41 can make the second limiting block 43 contact and fit with the side wall of the water-cooled copper tube 12 under the action of the torsion spring. At this time, during the movement of the water-cooled copper tube 12, under the action of its own rubber column, the second limiting block 43 will gradually increase the friction with the water-cooled copper tube 12, causing the second limiting block 43 to tilt at an angle along the moving angle of the water-cooled copper tube 12, so that the second collision column 44 disengages from the contact with the water-cooled copper tube 12. Subsequently, when the friction force is greater than the blocking effect of the second limiting block 43, the second limiting block 43 will reset, driving the second collision column 44 to collide with the side wall of the water-cooled copper tube 12.

[0054] During the process of the UAV body 1 taking pictures, due to the need to replace the battery itself, the UAV body 1 needs to take off and land back and forth. At this time, with the lifting and lowering of the UAV body 1, the water-cooled copper tube 12 can be displaced back and forth under the influence of the counterweight ball 16. When the water-cooled copper tube 12 moves, the positioning cylinder 5 is displaced to the position where the first chute 41 is located. Through the magnetic attraction effect of the first magnet 52 and the second magnet 53, the position of the positioning cylinder 5 itself is kept unchanged during the movement of the water-cooled copper tube 12, so that the liquid inside the water-cooled copper tube 12 rotates after passing through the fan blade 51, increasing the flow effect and mixing of the water flow. During the movement of the water-cooled copper tube 12, due to the influence of magnetic adsorption on the positioning cylinder 5, the water-cooled copper tube 12 and the positioning cylinder 5 will be in a relative movement state. At this time, the water flow will fluctuate after passing through the fan blade 51, and the fluctuating water flow will directly contact the shaking plate 61, causing the shaking plate 61 to swing up and down, increasing the shaking amplitude of the subsequent water flow. During the process of the UAV body 1 taking pictures of the buildings in the designated area after taking off, the protective shells 7 installed on both side walls of the UAV body 1 can protect the water-cooled copper tube 12, keeping the water-cooled copper tube 12 in a safe state in the air and reducing the direct contact with impurities.

[0055] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for three-dimensional model reconstruction and damage assessment of wide-area scenes based on remote sensing data, characterized in that: The three-dimensional model reconstruction and damage assessment method for wide-area scenes based on remote sensing data includes the following steps: S1. When the buildings in an area are damaged, use a mapping drone to scan the three-dimensional models of the buildings in the area to obtain the remote sensing data of the buildings in the area; S2. After obtaining the data of the damaged buildings in the area, reconstruct the three-dimensional model with the three-dimensional data and textures. Subsequently, by comparing the reconstructed three-dimensional model with the three-dimensional model before damage, damage data can be obtained; S3. After comparing the reconstructed three-dimensional model with the three-dimensional model before damage, a building damage report can be obtained to assist construction workers in repairing or reconstructing the building; The reconstructed three-dimensional model and the three-dimensional model before damage can be overlapped and compared in three-dimensional software. The damaged area can be obtained through the comparison results. At the same time, based on the three-dimensional model before damage, the surrounding environment can be observed to determine whether there are dangerous goods near the damaged building, providing basic data support for on-site rescue workers and reconstruction workers; In S1, the mapping drone includes a drone body (1); a heat dissipation chamber (11) is provided inside the drone body (1); water-cooled copper tubes (12) are slidably connected to both sides of the drone body (1); the ends of the water-cooled copper tubes (12) slide inside the heat dissipation chamber (11); a first fixing column (13) is fixedly connected inside the heat dissipation chamber (11); a roller (14) is rotatably connected to the middle of the first fixing column (13) and located in the middle of the water-cooled copper tube (12); a pulling rope (15) is wound around the middle of the water-cooled copper tube (12); the end of the pulling rope (15) bypasses the roller (14) and then passes through the bottom of the drone body (1), and a counterweight ball (16) is fixedly connected to the bottom. The counterweight ball (16) can pull the water-cooled copper tube (12) to generate displacement by its own weight, pulling the water-cooled copper tube (12) out of the drone body (1). The water-cooled copper tube (12) can exchange the high temperature inside the heat dissipation chamber (11) with the outside, and cooperate with the airflow generated by the fan blades of the drone body (1) to dissipate heat quickly.

2. The method for three-dimensional model reconstruction and damage assessment of a wide-area scene based on remote sensing data according to claim 1, wherein: A second fixing column (21) is fixedly connected to the middle of the heat dissipation chamber (11); a limiting cylinder (2) is fixedly connected to the middle of the second fixing column (21); an elastic rope (22) is provided inside the limiting cylinder (2); the end of the elastic rope (22) is fixedly connected to the middle of the water-cooled copper tube (12); multiple groups of first collision columns (23) are fixedly connected to the side wall of the limiting cylinder (2); multiple rubber rods (24) are fixedly connected to the side wall of the elastic rope (22); a collision ball (25) is fixedly connected to the end of the rubber rod (24); the side wall of the collision ball (25) is in contact with the side wall of the first collision column (23).

3. The method for reconstructing a three-dimensional model of a wide-area scene and damage assessment based on remote sensing data according to claim 2, wherein: A pair of air bags (3) are fixedly connected to the central position inside the elastic rope (22); a first limiting block (31) is fixedly connected to the side wall of the elastic rope (22); a gas guide pipe (32) is fixedly connected to the side wall of the first limiting block (31), and the other end of the gas guide pipe (32) is connected to the air bag (3).

4. The method for reconstructing a three-dimensional model of a wide-area scene and damage assessment based on remote sensing data according to claim 3, wherein: On both sides of the UAV body (1), side plates (4) are fixedly connected; a space communicating with the heat dissipation chamber (11) is provided inside the side plate (4), and the water-cooled copper pipe (12) slides inside the side plate (4); a first sliding groove (41) is provided in the side plate (4) at the position where the water-cooled copper pipe (12) is located; a first rotating shaft (42) is hinged to the side wall of the first sliding groove (41) through a torsion spring; second limiting blocks (43) are fixedly connected to both sides of the first rotating shaft (42) up and down, and the side walls of the second limiting blocks (43) are in contact with the side wall of the water-cooled copper pipe (12); a plurality of rubber columns are fixedly connected to the contact surfaces of the second limiting blocks (43) and the water-cooled copper pipe (12); a second collision column (44) is fixedly connected to the side wall of the second limiting block (43).

5. The method for reconstructing a three-dimensional model of a wide-area scene and damage assessment based on remote sensing data according to claim 4, wherein: A positioning cylinder (5) is slidably connected inside the water-cooled copper pipe (12); a plurality of rollers are rotatably connected to the side wall of the positioning cylinder (5), and all of them are in contact with the side wall of the water-cooled copper pipe (12); a fan blade (51) is installed inside the positioning cylinder (5); first magnets (52) are fixedly connected to the outer side walls of the positioning cylinder (5); second magnets (53) are fixedly connected to both sides of the first sliding groove (41) inside the side plate (4), and the first magnets (52) and the second magnets (53) attract each other magnetically.

6. The method for reconstructing a three-dimensional model of a wide-area scene and damage assessment based on remote sensing data according to claim 5, characterized in that: A second rotating shaft (6) is hinged to the inside of the positioning cylinder (5) in the water flow direction through a torsion spring; a shaking plate (61) is fixedly connected to the side wall of the second rotating shaft (6), and the end of the shaking plate (61) is triangularly arranged.

7. The method for reconstructing a three-dimensional model of a wide-area scene and damage assessment based on remote sensing data according to claim 4, characterized in that: On both side walls of the UAV body (1), protective shells (7) are provided, and the bottom of the protective shell (7) is hollow; a pair of pins (71) are fixedly connected to the side wall of the protective shell (7); grooves with the same shape are provided at the top of the side plate (4) at the same position as the pins (71); a plurality of flow guiding plates (72) are installed around the protective shell (7).

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