Earthwork volume calculation method based on unmanned aerial vehicle digital elevation model
Through aerial photography of the drone, the problem of poor accuracy in earthwork calculation in the existing technology is solved, and a high-precision and high-automation and high-automation calculation method is realized.
Patent Information
- Application Number
- CN202411385350.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-02-28
AI Technical Summary
In the prior art, the accuracy of the earthwork calculation method is poor and depends on a large amount of field work.
The earthwork calculation method based on the digital elevation model of the drone is adopted, and the terrain information is collected through aerial photography of the drone, and the digital elevation model after the original landform and earthwork are generated, and the excavation calculation is performed using spatial analysis and superposition analysis.
It realizes high-precision earthwork calculations, reduces field workload, improves the level of internal automation, and is suitable for a variety of terrain and engineering.
Smart Images
Figure CN119538627A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the field of earthwork engineering calculation, and in particular relates to an earthwork volume calculation method based on an unmanned aerial vehicle digital elevation model. Background Art
[0002] Earthwork calculations are involved in mining, construction, municipal administration, and transportation. Traditional calculation methods include grid method, triangulated network method, and cross-section method. Grid method is generally used for projects with relatively flat terrain, triangulated network is used for projects with relatively undulating terrain, and cross-section method is used for linear projects. The accuracy of the calculation method depends on the amount of field work. Summary of the invention
[0003] The technical problem to be solved by the present invention is to provide a method for calculating earthwork volume based on a UAV digital elevation model, which solves the problem of poor accuracy of the calculation method in the prior art.
[0004] The present invention adopts the following technical solutions to solve the above technical problems:
[0005] The earthwork volume calculation method based on the UAV digital elevation model includes the following steps:
[0006] Step 1: Select the survey area. Find the area to be photographed on the map and circle the area to generate KML format data.
[0007] Step 2: Design aerial photography, select flight routes, import KML data, and adjust drone aerial photography parameters;
[0008] Step 3: Set ground marking points on site and measure their coordinates, then take aerial photos, extract the original landform photos and photos after earthwork processing;
[0009] Step 4: Process the pictures taken by the drone to finally obtain two digital elevation models: the original landform and the processed earthwork model;
[0010] Step 5: Find the dot-marked image through the two digital elevation models, and input the corresponding coordinates of the dot for verification;
[0011] Step 6: Perform fill and cut calculations on the two digital elevation models of the original landform and the processed earthwork through spatial analysis and overlay analysis.
[0012] In step 2, the drone aerial photography parameters include camera selection, flight altitude, flight speed, and route speed.
[0013] The take-off speed of the drone shall not exceed 10m / s, the flight altitude shall be greater than the highest building height of the site, and the route speed shall be adjusted according to the actual flight altitude.
[0014] In step 3, the on-site identification points are marked with 500×500mm.
[0015] The image processing process in step 4 is as follows:
[0016] Multi-view geometric image matching is used to obtain a sparse point cloud, which is then encrypted to obtain a dense point cloud, which is then meshed and texture mapped.
[0017] The aerial photography route is formulated according to the following rules:
[0018] Select a corner of the aerial photography area as the starting point, fly along one of the edges to the adjacent corner, and then fly along the S route to the diagonal position of the starting point as the end point.
[0019] The distance between adjacent routes of the S route is set according to the specific shooting area.
[0020] The images taken by the drone are processed through the Smart3D processing platform.
[0021] In step 6, spatial analysis and overlay analysis were performed using ARGIS software.
[0022] A computer-readable storage medium stores computer-readable instructions, which, when executed by a processor, call all or part of the steps of the method.
[0023] Compared with the prior art, the present invention has the following beneficial effects:
[0024] 1. Effectively utilize the mobility and flexibility of drones to collect on-site terrain information, generate a complete digital elevation model through the Smart3D processing platform, and automatically, quickly and efficiently calculate the excavation and filling volume of the site earthwork construction process.
[0025] 2. The earthwork volume calculation method based on the UAV digital elevation model achieves small field workload and high office automation, and is suitable for earthwork volume calculation in various terrains and projects. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 This is a schematic diagram of the route for aerial photography based on a drone according to the present invention. DETAILED DESCRIPTION
[0027] The structure and working process of the present invention will be further described below in conjunction with the accompanying drawings.
[0028] The earthwork volume calculation method based on the UAV digital elevation model includes the following steps:
[0029] Step 1: Select the survey area. Find the area to be photographed on the map and circle the area to generate KML format data.
[0030] Step 2: Design aerial photography, select flight routes, import KML data, and adjust drone aerial photography parameters;
[0031] Step 3: Set ground marking points on site and measure their coordinates, then take aerial photos, extract the original landform photos and photos after earthwork processing;
[0032] Step 4: Process the pictures taken by the drone to finally obtain two digital elevation models: the original landform and the processed earthwork model;
[0033] Step 5: Find the dot-marked image through the two digital elevation models, and input the corresponding coordinates of the dot for verification;
[0034] Step 6: Perform fill and cut calculations on the two digital elevation models of the original landform and the processed earthwork through spatial analysis and overlay analysis.
[0035] Specific embodiments, such as Figure 1 As shown,
[0036] The earthwork volume calculation method based on the UAV digital elevation model includes the following steps:
[0037] Step 1: Select the survey area. Use map software to find the area to be photographed on the map and circle the area to generate KML format data.
[0038] Step 2: Design aerial photography, select flight route, import KML data, and adjust parameters such as drone camera selection, flight altitude, flight speed, and route speed.
[0039] Step 3: Set ground identification points on site and measure their coordinates, then take aerial photos and extract pictures of the original landform and pictures after earthwork processing.
[0040] This embodiment uses paint to mark ground points and measure their coordinates, then performs aerial photography to extract pictures of the original landform and pictures after earthwork processing.
[0041] Step 4: Process the pictures taken by the drone to finally obtain two digital elevation models of the original landform and the processed earthwork. In this embodiment, the pictures taken by the drone are imported into the Smart3D processing platform, and multi-view geometric image matching is performed on the taken images to obtain a sparse point cloud.
[0042] The sparse point cloud is then encrypted through the algorithm of the processing platform to obtain a dense point cloud, and then the dense point cloud is gridded and texture mapped, finally obtaining two digital elevation models of the original landform and the earthwork processing.
[0043] Step 5. Find the image with dot marks through the two digital elevation models, and input the corresponding coordinates of the marks for calibration. To ensure that there is no distortion in the aerial triangulation calculation, find the image with dot marks through the two digital elevation models, and input the corresponding coordinates of the marks for calibration to ensure the accuracy of the two digital elevation models.
[0044] Step 6: Use ARGIS software to perform spatial analysis and overlay analysis on the two digital elevation models of the original landform and the processed earthwork to calculate the cut and fill volume.
[0045] In this embodiment, the take-off speed of the UAV is no more than 10m / s, the navigation altitude is greater than the highest building height of the site, and the route speed is actually adjusted according to the different navigation altitudes.
[0046] On-site identification points are marked with 500×500mm.
[0047] The aerial photography route is formulated according to the following rules:
[0048] Select a corner of the aerial photography area as the starting point, fly along one of the edges to the adjacent corner, and then fly along the S route to the diagonal position of the starting point as the end point.
[0049] The distance between adjacent routes of the S route is set according to the specific shooting area.
[0050] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or apparatuses.
[0051] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.
[0052] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.
[0053] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0054] A computer-readable storage medium stores computer-readable instructions, which, when executed by a processor, call all or part of the steps of the method.
[0055] If the above functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program code.
[0056] It should be understood that the present solution is not limited to the above-mentioned specific implementation methods, and the devices and structures not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solution of the present solution without departing from the scope of the technical solution of the present solution, or modify it into an equivalent embodiment with equivalent changes, which does not affect the essential content of the present solution. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present solution without departing from the content of the technical solution of the present solution still falls within the scope of protection of the technical solution of the present solution.
Claims
1. The earthwork volume calculation method based on the UAV digital elevation model is characterized by: The steps include: Step 1: Select the survey area. Find the area to be photographed on the map and circle the area to generate KML format data. Step 2: Design aerial photography, select flight routes, import KML data, and adjust drone aerial photography parameters; Step 3: Set ground marking points on site and measure their coordinates, then take aerial photos, extract the original landform photos and photos after earthwork processing; Step 4: Process the pictures taken by the drone to finally obtain two digital elevation models: the original landform and the processed earthwork model; Step 5: Find the dot-marked image through the two digital elevation models, and input the corresponding coordinates of the dot for verification; Step 6: Perform fill and cut calculations on the two digital elevation models of the original landform and the processed earthwork through spatial analysis and overlay analysis.
2. The earthwork volume calculation method based on the UAV digital elevation model according to claim 1 is characterized in that: In step 2, the drone aerial photography parameters include camera selection, flight altitude, flight speed, and route speed.
3. The earthwork volume calculation method based on the UAV digital elevation model according to claim 2 is characterized in that: The take-off speed of the drone shall not exceed 10m / s, the flight altitude shall be greater than the highest building height of the site, and the route speed shall be adjusted according to the actual flight altitude.
4. The earthwork volume calculation method based on the UAV digital elevation model according to claim 1 is characterized in that: In step 3, the on-site identification points are marked with 500×500mm.
5. The earthwork volume calculation method based on the UAV digital elevation model according to claim 1 is characterized in that: The image processing process in step 4 is as follows: Multi-view geometric image matching is used to obtain a sparse point cloud, which is then encrypted to obtain a dense point cloud, which is then meshed and texture mapped.
6. The earthwork volume calculation method based on the UAV digital elevation model according to claim 1 is characterized in that: The aerial photography route is formulated according to the following rules: Select a corner of the aerial photography area as the starting point, fly along one of the edges to the adjacent corner, and then fly along the S route to the diagonal position of the starting point as the end point.
7. The earthwork volume calculation method based on the UAV digital elevation model according to claim 6 is characterized in that: The distance between adjacent routes of the S route is set according to the specific shooting area.
8. The earthwork volume calculation method based on UAV digital elevation model according to claim 1 is characterized in that: The images taken by the drone are processed through the Smart3D processing platform.
9. The earthwork volume calculation method based on UAV digital elevation model according to claim 1 is characterized in that: In step 6, spatial analysis and overlay analysis were performed using ARGIS software.
10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-readable instructions, and when the computer-readable instructions are executed by a processor, all or part of the steps of the method described in any one of claims 1 to 9 are called.