Heat dissipation method for three-dimensional modeling system carried by unmanned aerial vehicle

Abstract

The invention discloses a heat dissipation method for a three-dimensional modeling system carried by an unmanned aerial vehicle, and relates to the technical field of thermal management, and the method comprises the steps: obtaining a target position through a positioning device, setting a preset route, controlling the unmanned aerial vehicle to collect a target image according to the preset route, receiving the image through a set top box, and feeding back the image to an upper computer. After the collection task is completed, the unmanned aerial vehicle is controlled to return to the ground, the maximum center-of-gravity distance between the set top box and the unmanned aerial vehicle is determined according to the maximum center-of-gravity offset of the unmanned aerial vehicle, the heat dissipation space is increased, a temperature sensor is arranged in the set top box to monitor the temperature in real time, and it is ensured that when the temperature exceeds a threshold value, an air cooling radiator can be started in time for heat dissipation; according to the technical scheme, the installation distance between the unmanned aerial vehicle and the set top box is increased, the heat dissipation efficiency is improved, the risk of local heat accumulation is reduced, meanwhile, the temperature sensor is used for monitoring the temperature of the set top box in real time and dissipating heat in time, performance degradation and image quality reduction of the set top box are prevented, and the working efficiency and stability of the unmanned aerial vehicle are improved.

Description

Technical Field

[0001] The present application relates to the technical field of thermal management, and in particular to a heat dissipation method for a three-dimensional modeling system carried by an unmanned aerial vehicle. Background Art

[0002] At present, the UAV aerial photography 3D rapid modeling system has been widely used in the 3D reconstruction of outdoor terrain. This system can capture images of a large area through the camera carried by the drone, and use computer vision technology to generate high-precision 3D models. This technology is not limited to the modeling of outdoor terrain, but can also be applied to the modeling of indoor environments, providing accurate 3D data support for the fields of architecture, engineering, film and television production, etc. The set-top box is one of the core components in the UAV aerial photography 3D rapid modeling system. It is responsible for processing a large amount of image data obtained from the drone camera and transmitting this data to the ground station or the cloud for 3D modeling. The set-top box is closely related to the performance and stability of the entire system, and its working status directly affects the quality of the final generated 3D model.

[0003] The current UAV aerial photography 3D rapid modeling system has exposed a series of problems caused by poor heat dissipation of the set-top box in practical applications, especially in long-term and high-load operation environments. These problems seriously affect the performance and reliability of the system: 1. The UAV set-top box generates a lot of heat when processing a large amount of image data and performing complex calculations. Due to the imperfect design of the heat dissipation system, the heat cannot be discharged in a timely and effective manner, resulting in a gradual increase in the temperature inside the set-top box. The high temperature environment will cause key components such as the controller in the set-top box to overheat and exceed their normal operating temperature range. When the temperature exceeds the critical point, the system may automatically shut down or crash to protect the hardware, but this will cause the UAV to interrupt the operation and affect the completion of the 3D modeling task. 2. The processor in the set-top box usually automatically reduces the operating frequency under high temperature conditions to reduce heat generation. This phenomenon is called "frequency reduction protection". Although this mechanism protects the hardware, it also directly leads to a decrease in computing speed, making the image processing and 3D modeling process slow. High temperature may also affect the wireless communication module in the set-top box, resulting in unstable data transmission or reduced speed. Especially in scenarios where large amounts of data need to be transmitted in real time, transmission delays can seriously affect the accuracy and efficiency of modeling. 3. The life of electronic components will be significantly shortened if they are in a high temperature environment for a long time. For example, components such as capacitors and chips may age faster due to long-term overheating, eventually leading to frequent equipment failures. To deal with the problem of poor heat dissipation, users may need to frequently replace or repair set-top box related components, which not only increases maintenance costs, but may also cause the drone to lose availability in critical missions.

[0004] A series of problems caused by poor heat dissipation of the drone set-top box not only affect the stability and efficiency of the system, but also directly lead to a decline in the quality of 3D model construction. In a high temperature environment, the processor in the set-top box may reduce the operating frequency, resulting in a decrease in the accuracy of image processing. Due to the slow processing speed and unstable transmission data, some image data may not be fully processed or omitted, resulting in incomplete or missing details in the generated 3D model. This is particularly evident for application scenarios that require fine modeling. Model generation is forced to be interrupted due to overheating or restarting. Restarting modeling may lead to inconsistent model data or inability to fully recover, resulting in incomplete modeling results. Summary of the invention

[0005] The purpose of this application is to optimize heat dissipation by optimizing the installation distance between the drone and the set-top box, and promptly perform cooling treatment according to real-time temperature changes, thereby significantly improving the heat dissipation effect of the set-top box, reducing the risk of local heat accumulation, avoiding performance degradation and image quality degradation caused by high temperature, and improving the stability and work efficiency of the drone in three-dimensional modeling tasks.

[0006] The technical solution of the present application is to provide a heat dissipation method for a three-dimensional modeling system carried by an unmanned aerial vehicle, the method comprising:

[0007] Step 1, obtaining the location of the target to be photographed by the drone, and setting a preset route based on the location of the target to be photographed;

[0008] Step 2: preset a maximum center of gravity offset of the drone based on the height of the drone body, determine a maximum center of gravity distance between the set-top box and the drone according to the maximum center of gravity offset, and install the set-top box with an air-cooled radiator above the drone according to the maximum center of gravity distance, wherein the maximum center of gravity offset is proportional to the maximum center of gravity distance;

[0009] Step 3, control the drone to fly according to the preset route, use the camera to capture the image of the target and send it to the set-top box, the set-top box pre-processes the image and sends the processed image to the host computer;

[0010] Step 4, a temperature sensor is set inside the set-top box, and the temperature of the set-top box is measured by the temperature sensor. When the measured temperature reaches a preset temperature threshold, the set-top box turns on the air-cooling radiator for heat dissipation. When the measured temperature does not reach the preset temperature threshold, the set-top box turns off the air-cooling radiator.

[0011] Step 5: After completing image acquisition, control the drone to return to the ground.

[0012] Furthermore, step 2 specifically includes the following steps:

[0013] Step 2.1: Based on the height H1 of the drone, the maximum center of gravity offset of the drone is preset to ΔX max , where the height H1 of the drone body and the maximum center of gravity offset ΔX max is proportional to;

[0014] Step 2.2, calculate the total center of gravity position of the top box and the drone, and calculate the maximum center of gravity offset ΔX of the drone according to the total center of gravity position and the preset maximum center of gravity offset ΔX of the drone. max , the maximum center of gravity distance D between the computer top box and the drone max ;

[0015] Step 2.3, based on the maximum center of gravity distance D between the drone and the set-top box max Select a bracket of corresponding length and use the bracket to install the set-top box with air-cooled radiator above the drone.

[0016] Furthermore, the maximum center of gravity offset is ΔX max for:

[0017] ΔX max =e·H1

[0018] Where e is a real number, e∈[0.1,0.2].

[0019] Furthermore, the total center of gravity of the set-top box and the drone is:

[0020]

[0021] Where, X total is the total center of gravity position of the set-top box and the drone, M1 is the mass of the drone, M2 is the mass of the set-top box, X1 is the initial center of gravity position of the drone, D is the center of gravity distance between the drone and the set-top box, and the total center of gravity offset between the set-top box and the drone is:

[0022] X total -X1

[0023] The total center of gravity offset between the set-top box and the drone satisfies:

[0024] X total -X1≤ΔX max

[0025]

[0026] Get the maximum center of gravity distance D between the drone and the set-top box max for:

[0027]

[0028] Furthermore, in step 1, the position of the shooting target is obtained through the positioning device, and the position of the shooting target is used as the central reference point of the UAV flight. A three-dimensional coordinate system is established in the UAV flight control software with the central reference point as the origin, the east direction as the x-axis, the north direction as the y-axis, and the vertical direction as the z-axis. A group of image acquisition points are set based on the three-dimensional coordinate system, and the coordinate information of the image acquisition points is input into the UAV flight control software. Based on the coordinate information of the image acquisition points, the flight control software is used to set the preset route of the UAV flight.

[0029] Furthermore, step 3 specifically includes:

[0030] The drone is controlled to fly along a preset route and arrive at different image acquisition points in sequence. Each time it arrives at an image acquisition point, the position of the camera on the drone is adjusted to face the shooting target. The camera is used to capture the image of the shooting target and send it to the image processing module of the set-top box. The image processing module filters the received image, converts the filtered image into a data packet, and sends the data packet to the host computer on the ground through the communication module in the set-top box.

[0031] Furthermore, step 4 specifically includes:

[0032] The temperature sensor is connected to the controller inside the set-top box, and the temperature sensor is turned on before the drone takes off. The temperature sensor is used to detect the temperature of the set-top box in real time, and the measured temperature signal is sent to the controller inside the set-top box. The controller compares the measured temperature with the preset temperature threshold. When the measured temperature is greater than or equal to the preset temperature threshold, the controller inside the set-top box turns on the air-cooled radiator to dissipate heat for the set-top box. When the measured temperature is less than the preset temperature threshold, the controller turns off the air-cooled radiator and stops dissipating heat.

[0033] The beneficial effects of this application are:

[0034] First, the technical solution in the present application effectively prevents the instability of the drone due to uneven load during flight by setting the maximum center of gravity offset of the drone and the installation distance of the set-top box, thereby ensuring that the drone can fly stably in a complex flight environment; the technical solution in the present application increases the heat dissipation distance between the set-top box and the drone, which can significantly improve the heat dissipation effect. When the set-top box is in direct contact with the drone or the distance is too close, the heat generated cannot be effectively discharged, which may cause the set-top box to overheat, thereby affecting its working performance. By optimizing the distance, the air-cooled heat dissipation system of the set-top box can better play its role, reduce the risk of local heat accumulation, avoid circuit failure or performance degradation caused by excessive temperature, and improve the working efficiency of the set-top box.

[0035] Second, the technical solution in the present application sets a temperature sensor that can monitor the temperature status of the set-top box in real time. When the temperature of the set-top box exceeds a preset threshold, the controller can promptly start the air-cooled radiator for heat dissipation, effectively avoiding the performance degradation of the set-top box due to excessive temperature, such as reduced operating speed, reduced image processing efficiency, and other problems; in addition, the timeliness of heat dissipation also reduces the image quality degradation caused by thermal noise, ensures the clarity and accuracy of the captured image, and has a positive effect on subsequent image recognition and analysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The advantages of the above and / or additional aspects of the present application will become apparent and easily understood in the description of the embodiments in conjunction with the following drawings, in which:

[0037] Figure 1 is a schematic flow chart of a heat dissipation method for a three-dimensional modeling system mounted on a drone according to an embodiment of the present application;

[0038] Figure 2 is a schematic diagram of the overall structure of a three-dimensional modeling system carried by a drone according to an embodiment of the present application;

[0039] Figure 3 It is a schematic diagram of the structure of a bracket between a set-top box and a drone according to an embodiment of the present application.

[0040] Among them, 1- drone, 2- set-top box, 3- bracket. DETAILED DESCRIPTION

[0041] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0042] In the following description, many specific details are elaborated to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited to the specific embodiments disclosed below.

[0043] like Figure 1 As shown, this embodiment provides a heat dissipation method for a three-dimensional modeling system mounted on an unmanned aerial vehicle, comprising:

[0044] Step 1: Get the location of the target being photographed by the drone, and set a preset route based on the location of the target being photographed.

[0045] The position of the shooting target is obtained through the positioning device, and the position of the shooting target is used as the central reference point of the UAV flight. A three-dimensional coordinate system is established in the UAV flight control software with the central reference point as the origin, the due east direction as the x-axis, the due north direction as the y-axis, and the vertical direction as the z-axis. A set of image acquisition points is set based on the three-dimensional coordinate system, and the coordinate information of the image acquisition points is input into the UAV flight control software. The flight control software is used to set the preset flight route of the UAV based on the coordinate information of the image acquisition points, ensuring that the UAV can reach each image acquisition point in sequence during the flight according to the preset route. Among them, the flight control software can be used to set the preset flight route of the UAV in an existing method.

[0046] It should be noted that in practice, the operator needs to independently set the image collection points according to the specific collection task. For example, when modeling a building, it is necessary to collect images at different heights and angles. The preset route needs to include all image collection points. The UAV flies according to the preset route and arrives at different image collection points in turn for image collection.

[0047] In this embodiment, the positioning device for obtaining the position of the target photographed by the drone can be an existing device, such as a GPS positioning system.

[0048] Step 2, presetting the maximum center of gravity offset of the drone based on the height of the drone body, determining the maximum center of gravity distance between the set-top box and the drone according to the maximum center of gravity offset, and installing the set-top box with an air-cooled radiator above the drone according to the maximum center of gravity distance, wherein the maximum center of gravity offset is proportional to the maximum center of gravity distance; specifically comprising the following steps:

[0049] Step 2.1: Based on the height H1 of the drone, the maximum center of gravity offset of the drone is preset to ΔX max , where the height of the drone is proportional to the maximum center of gravity offset, and the maximum center of gravity offset is ΔX max for:

[0050] ΔX max =e·H1

[0051] Where, e is a real number, e∈[0.1,0.2];

[0052] Step 2.2, calculate the total center of gravity position of the top box and the drone, and calculate the maximum center of gravity distance between the top box and the drone based on the total center of gravity position and the preset maximum center of gravity offset of the drone, as follows:

[0053] The total center of gravity of the set-top box and the drone is:

[0054]

[0055] Where, X total is the total center of gravity position of the set-top box and the drone, M1 is the mass of the drone, M2 is the mass of the set-top box, X1 is the initial center of gravity position of the drone, and D is the center of gravity distance between the drone and the set-top box. Thus, the total center of gravity offset between the set-top box and the drone is:

[0056] X total -X1

[0057] The maximum center of gravity offset of the drone is ΔX max , then the total center of gravity offset between the set-top box and the drone satisfies:

[0058] X total -X1≤ΔX max

[0059]

[0060] Get the maximum center of gravity distance D between the drone and the set-top box max for:

[0061]

[0062] In this embodiment, Figures 2 to 3 As shown, the flight stability of the drone requires that the total center of gravity of the set-top box and the drone cannot deviate too far from the initial center of gravity of the drone. The specific value depends on the structural design of the drone. Normally, the maximum center of gravity offset allowed for the total center of gravity is within 10% to 20% of the overall size of the drone.

[0063] Step 2.3, based on the maximum center of gravity distance D between the drone and the set-top box max Select a bracket of corresponding length and use the bracket to install the set-top box with air-cooled radiator above the drone.

[0064] In this embodiment, after selecting a bracket of corresponding length, the bracket is installed directly above the drone, and then the set-top box is fixed above the bracket by bolts.

[0065] In this embodiment, both the drone and the set-top box will generate heat during operation. If the set-top box is directly fixed above the drone, the heat generated by the drone and the set-top box cannot be discharged well. Being in high temperature for a long time is not conducive to the operation of the set-top box. Direct contact between the drone and the set-top box or a small distance between them is also not conducive to heat dissipation. Heat will accumulate in this narrow space, causing local temperature rise. Therefore, it is necessary to increase the distance between the drone and the set-top box on the basis of ensuring the stable flight of the drone, so that the air cooling of the set-top box can better dissipate heat and reduce the risk of local heat accumulation.

[0066] Step 3, control the drone to fly according to the preset route, use the camera to capture the image of the target and send it to the set-top box, the set-top box pre-processes the image and sends the processed image to the host computer on the ground.

[0067] The drone is controlled by a ground remote control to fly along a preset route and arrive at different image acquisition points in sequence. Each time it arrives at an image acquisition point, the position of the camera on the drone is adjusted to face the shooting target. The camera is used to capture the image of the shooting target and send it to the image processing module of the set-top box. The image processing module filters the received image and converts the filtered image into a data packet in a specific format (a format that can be recognized by the host computer), and sends the data packet in the specific format to the host computer on the ground through the communication module in the set-top box for subsequent processing.

[0068] In this embodiment, before capturing images of the target, the route verification needs to be performed to ensure that all image acquisition points are within the flyable area. If some image acquisition points are outside the flyable area of ​​the drone, the coordinates of these image acquisition points need to be reset. After starting the flight mission, the drone will fly according to the preset route and take pictures at the image acquisition points.

[0069] In this embodiment, after receiving the image captured by the camera, the image processing module first performs filtering processing through a built-in filter to reduce noise on the image, and then converts the image into a data packet in a specific format, wherein the filter adopts an existing filter, such as a Gaussian filter, a mean filter, etc.

[0070] Step 4: a temperature sensor is set inside the set-top box, and the temperature of the set-top box is measured by the temperature sensor. When the measured temperature reaches a preset temperature threshold, the set-top box turns on the air-cooled radiator for heat dissipation. When the measured temperature does not reach the preset temperature threshold, the set-top box turns off the air-cooled radiator.

[0071] A temperature sensor is set inside the set-top box, and the temperature sensor is connected to a controller inside the set-top box. The temperature sensor is turned on before the drone takes off, and the temperature of the set-top box is detected in real time using the temperature sensor. The measured temperature signal is sent to the controller inside the set-top box, and the controller compares the measured temperature with a preset temperature threshold. When the measured temperature is greater than or equal to the preset temperature threshold, the controller inside the set-top box turns on an air-cooled radiator to dissipate heat for the set-top box. When the measured temperature is less than the preset temperature threshold, the controller inside the set-top box turns off the air-cooled radiator to stop heat dissipation.

[0072] In this embodiment, when the drone flies according to the predetermined route and collects images through the camera, the set-top box is in working state for a long time, and its temperature continues to rise. If the heat dissipation is insufficient or exceeds the temperature range required for operation, it will have an adverse effect on the performance of the set-top box. Specifically, excessive temperature will slow down the operation speed of the controller and the image processing module, affecting the efficiency of real-time image reception and processing; excessive temperature will introduce thermal noise, which will reduce the quality of the image, specifically manifested as random bright spots, interference points or blurred parts appearing in the image, and the filter in the image processing module cannot accurately distinguish between noise and effective information, resulting in a decrease in the quality of the processed image, affecting the recognition and analysis of subsequent images; excessive temperature will also cause the controller inside the set-top box to stop working or restart, causing the drone mission to be interrupted or the image data to be lost. Therefore, it is necessary to use a temperature sensor to detect the temperature of the set-top box in real time and dissipate heat in time when its temperature reaches the preset temperature threshold.

[0073] Step 5: After completing the image acquisition task, control the drone to return to the ground.

[0074] After the drone flies according to the preset route and completes image collection at all image collection points in sequence, it is controlled to return to the ground to complete the image collection task.

[0075] The technical solution of the present application is described in detail above in combination with the accompanying drawings. The present application proposes a heat dissipation method for a drone-mounted three-dimensional modeling system, including: step 1, obtaining the position of the drone shooting target, and setting a preset route based on the position of the shooting target; step 2, presetting the maximum center of gravity offset of the drone based on the height of the drone body, determining the maximum center of gravity distance between the set-top box and the drone according to the maximum center of gravity offset, and installing the set-top box with an air-cooled radiator above the drone according to the maximum center of gravity distance, wherein the maximum center of gravity offset is positive to the maximum center of gravity distance; step 3, controlling the drone to fly according to the preset route, using a camera to capture an image of the shooting target and sending it to the set-top box, the set-top box pre-processes the image and sends the processed image to the upper computer on the ground; step 4, setting a temperature sensor inside the set-top box, using the temperature sensor to measure the temperature of the set-top box, when the measured temperature reaches the preset temperature threshold, the set-top box turns on the air-cooled radiator for heat dissipation, and when the measured temperature does not reach the preset temperature threshold, the set-top box turns off the air-cooled radiator; step 5, after completing the image acquisition task, control the drone to return to the ground.

[0076] The technical solution of the present application increases the installation distance between the drone and the set-top box, significantly improves the heat dissipation effect while ensuring the stable flight of the drone, and effectively discharges the heat generated by the set-top box by optimizing the distance, reducing the risk of local heat accumulation, avoiding circuit failure or performance degradation caused by excessive temperature, and improving the working efficiency of the set-top box. The temperature sensor is set to monitor the temperature state of the set-top box in real time, and the air-cooled radiator can be started in time for heat dissipation when the temperature exceeds the preset threshold, effectively avoiding the problem of set-top box performance attenuation caused by excessive temperature, and the problem of image quality degradation caused by thermal noise. This combination of stable monitoring and distance adjustment not only improves the adaptability of the set-top box in different environments, but also enhances its reliability in drone image acquisition tasks, greatly improves the working efficiency and stability of the drone, and provides a solid guarantee for the smooth progress of the three-dimensional modeling task.

[0077] The steps in this application can be adjusted in order, combined, and deleted according to actual needs.

[0078] The units in the device of the present application can be combined, divided and deleted according to actual needs.

[0079] Although the present application is disclosed in detail with reference to the accompanying drawings, it should be understood that these descriptions are merely exemplary and are not intended to limit the application of the present application. The scope of protection of the present application is defined by the appended claims and may include various modifications, alterations and equivalents made to the invention without departing from the scope and spirit of the present application.

Claims

1. A heat dissipation method for a three-dimensional modeling system mounted on an unmanned aerial vehicle, characterized in that: The method includes: Step 1, obtaining the location of the target to be photographed by the drone, and setting a preset route based on the location of the target to be photographed; Step 2: preset a maximum center of gravity offset of the drone based on the height of the drone body, determine a maximum center of gravity distance between the set-top box and the drone according to the maximum center of gravity offset, and install the set-top box with an air-cooled radiator above the drone according to the maximum center of gravity distance, wherein the maximum center of gravity offset is proportional to the maximum center of gravity distance; Step 3, controlling the drone to fly according to the preset route, using a camera to capture an image of the shooting target and sending it to a set-top box, the set-top box pre-processing the image and sending the processed image to a host computer; Step 4, setting a temperature sensor inside the set-top box, using the temperature sensor to measure the temperature of the set-top box, when the measured temperature reaches a preset temperature threshold, the set-top box turns on an air-cooled radiator for heat dissipation, and when the measured temperature does not reach the preset temperature threshold, the set-top box turns off the air-cooled radiator; Step 5: After completing image acquisition, control the drone to return to the ground.

2. The heat dissipation method of the three-dimensional modeling system mounted on an unmanned aerial vehicle according to claim 1, characterized in that: The step 2 specifically includes the following steps: Step 2.1: Based on the height H1 of the drone body, the maximum center of gravity offset of the drone is preset to ΔX max , where the height H1 of the drone body and the maximum center of gravity offset ΔX max is proportional to; Step 2.2, calculating the total center of gravity position of the set-top box and the drone, and calculating the maximum center of gravity offset ΔX of the drone according to the total center of gravity position and the preset maximum center of gravity offset ΔX of the drone. max , the maximum center of gravity distance D between the computer top box and the drone max ; Step 2.3, based on the maximum center of gravity distance D between the drone and the set-top box max Select a bracket of corresponding length and use the bracket to install the set-top box with air-cooled radiator above the drone.

3. The heat dissipation method for the three-dimensional modeling system mounted on an unmanned aerial vehicle according to claim 1, characterized in that: The maximum center of gravity offset is ΔX max for: ΔX max =e·H1 Where e is a real number, e∈[0.1,0.2].

4. The heat dissipation method for the three-dimensional modeling system mounted on an unmanned aerial vehicle according to claim 1, characterized in that: The total center of gravity of the set-top box and the drone is: Where, X total is the total center of gravity position of the set-top box and the drone, M1 is the mass of the drone, M2 is the mass of the set-top box, X1 is the initial center of gravity position of the drone, D is the center of gravity distance between the drone and the set-top box, and the total center of gravity offset between the set-top box and the drone is: X total -X1 The total center of gravity offset between the set-top box and the drone satisfies: X total -X1≤ΔX max Get the maximum center of gravity distance D between the drone and the set-top box max for:

5. The heat dissipation method for the three-dimensional modeling system mounted on an unmanned aerial vehicle according to claim 1, characterized in that: In the step 1, the position of the shooting target is obtained by a positioning device, and the position of the shooting target is used as the central reference point of the UAV flight. A three-dimensional coordinate system is established in the UAV flight control software with the central reference point as the origin, the east direction as the x-axis, the north direction as the y-axis, and the vertical direction as the z-axis. A group of image acquisition points are set based on the three-dimensional coordinate system, and the coordinate information of the image acquisition points is input into the UAV flight control software. The flight control software is used to set a preset route for the UAV flight based on the coordinate information of the image acquisition points.

6. The heat dissipation method for the three-dimensional modeling system mounted on an unmanned aerial vehicle according to claim 1, characterized in that: The step 3 specifically includes: The drone is controlled to fly along a preset route and arrive at different image acquisition points in sequence. After arriving at an image acquisition point each time, the position of the camera on the drone is adjusted to face the shooting target. The image of the shooting target is captured by the camera and sent to the image processing module of the set-top box. The image processing module filters the received image, converts the filtered image into a data packet, and sends the data packet to the upper computer on the ground through the communication module in the set-top box.

7. The heat dissipation method for the three-dimensional modeling system mounted on an unmanned aerial vehicle according to claim 1, characterized in that: The step 4 specifically includes: The temperature sensor is connected to the controller inside the set-top box, and the temperature sensor is turned on before the drone takes off. The temperature sensor is used to detect the temperature of the set-top box in real time, and the signal of the measured temperature is sent to the controller inside the set-top box. The controller compares the measured temperature with a preset temperature threshold. When the measured temperature is greater than or equal to the preset temperature threshold, the controller inside the set-top box turns on the air-cooled radiator to dissipate heat for the set-top box. When the measured temperature is less than the preset temperature threshold, the controller turns off the air-cooled radiator to stop heat dissipation.

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