33 results about "Commercial software" patented technology

The invention provides a thermal elastic structure joint topological optimization method based on MATLAB and ABAQUS, and belongs to the technical field of thermal elastic structure optimization design. Firstly, finite element models of mechanical loads and thermal loads are established in ABAQUS, and files are exported; then calling an ABAQUS operation model in MATLAB, extracting core data such as nodes, units and a stiffness matrix, and constructing a parameterized thermodynamic finite element model based on an SIMP method; calculating a function value and sensitivity by taking volume minimization as a target and taking global stress and temperature constraint as conditions; and finally, iteratively optimizing the design variables by adopting a moving asymptote algorithm, and obtaining a final topological configuration through a filtering method. Through deep cooperation of MATLAB and ABAQUS, core finite element data of commercial software is extracted at a time for optimization iteration, repeated data generation and interaction are avoided, the calculation efficiency is greatly improved, and an efficient solution is provided for processing the topological optimization problem of stress and temperature constraints under complex heat-force loads.

The embodiment of the application discloses a kind of identification methods of pointer chasing memory access mode, the execution trajectory of binary instruction generated when target program runs is obtained by binary instrumentation, the execution trajectory of binary instruction is statically analyzed to obtain five-level consistency query result, address dependency relationship category and context stability category are obtained by dynamic analysis, on this basis, value flow causality verification is executed, address dependency relationship category, five-level consistency query result, value flow verification causality result and context stability category are successively combined to carry out multilevel determination, the final determination result of each binary instruction is generated, and whether the binary instruction is pointer chasing memory access mode is confirmed according to the final determination result, without source code, pointer chasing memory access mode can be accurately identified, and multi-level confidence determination is provided, which can be directly applied to commercial software, third-party library and legacy system etc. Source code unavailable scene.

The present application relates to a kind of diesel engine electronic control system hardware PCB power supply function model calibration and identification method, this method is in the process of traditional mature PCB performance simulation commercial software to PCB is carried out performance evaluation, the concept of diesel engine electronic control system hardware PCB power supply function model is established, the model parameter class is reasonably divided, then on this basis, the calibration method that can effectively improve model precision is proposed, and the identification method that can verify model precision is correspondingly given.The proposed method breaks through the present situation that simulation precision is difficult to control in the traditional PCB performance evaluation process, and forms a scheme that can guarantee model precision by means of the two main links of calibration and identification.Its contribution lies in establishing the bridge between traditional commercial software simulation and equipment digital prototype construction, and it is an important part of diesel engine electronic control system digital prototype construction.

The application relates to the technical field of fluid mechanics, in particular to a slot flow direct numerical simulation method and device, electronic equipment and a storage medium, wherein the method comprises the following steps: constructing a calculation domain reflecting the flow characteristics of slot flow; performing grid division on the calculation domain based on a dimensionless wall distance standard, and setting boundary conditions according to the flow characteristics of the slot flow; based on the divided grid and the boundary conditions, selecting a laminar flow model to perform steady-state calculation, and iterating to convergence to obtain a slot flow laminar flow initial flow field; loading the slot flow laminar flow initial flow field into a transient solver, calling a preset flow disturbance program, superimposing a high-intensity disturbance in the initial stage of transient calculation, so as to realize high-efficiency evolution simulation of the slot flow from laminar flow to fully developed turbulent flow, and output flow field parameters representing the turbulent flow characteristics. Therefore, the problems of low turbulent flow triggering efficiency and poor calculation precision in the near-wall region when a commercial software is used to simulate slot flow in the related art are solved.

The invention discloses a viscoelastic-plastic numerical simulation method, which comprises the following steps of: receiving physical modeling and solving control data of a viscoelastic-plastic material, constructing a convex cone planning model for uniformly describing elastoplasticity, viscoelasticity and friction multi-physical field coupling behaviors according to the physical modeling and solving control data, expressing a plastic yield criterion and a viscous flow law as second-order cone constraints, converting the model into a second-order cone complementary equation; converting the equation into an implicit immobile point iterative equation by adopting a modular system matrix splitting iterative algorithm, performing matrix splitting on a system stiffness matrix, and constructing an iterative solution format with calculation complexity at a quadratic level; and performing iterative calculation to convergence based on the format and the input data, and outputting numerical results of a displacement field, a stress field and a strain field. According to the method, multi-field coupling behaviors are unified to a convex cone planning framework, solving is conducted through an efficient iterative algorithm, the calculation efficiency and stability of large-scale viscoelastic-plastic numerical simulation are improved, and the problem of calculation bottleneck caused by existing commercial software multi-field decoupling and general solver explicit inversion is solved.

The application discloses a kind of DWG file batch browsing and structured reading method based on lightweight design engine.The application constructs the complete process of "batch preprocessing-multithreading analysis-structured extraction-cross-platform browsing" by integrating open source DWG analysis technology and lightweight design architecture.The method realizes bottom DWG format analysis based on LibreDWG, generates lightweight intermediate files through redundant data elimination and geometry simplification, realizes efficient processing of batch files by combining multi-thread task scheduling;At the same time, structured data such as layer, entity geometry parameter and text attribute can be automatically extracted and standardized stored;Finally, cross-platform batch browsing of desktop and Web is supported, with interactive functions such as layer control, text search and measurement.The application is independent of commercial CAD software, and the batch processing efficiency is improved by more than 300% compared with traditional solutions, the lightweight file size is reduced by 60%-80%, and can be widely used in engineering design collaboration, BIM data integration, drawing automatic review and other scenes.

The invention discloses a method and device for determining the minimum turning radius, a storage medium and an electronic device, and relates to the field of vehicle maneuvering characteristic calculation.The method comprises the steps that under the condition that a vehicle executes a steering event, steering information of the vehicle is obtained, the steering information at least comprises the maximum inner side turning angle of a front wheel of the vehicle and the maximum outer side turning angle of the front wheel of the vehicle; the correction amount of the steering information is determined according to the maximum inner side rotating angle of the front wheel and the maximum outer side rotating angle of the front wheel, and the steering information is updated according to the correction amount; and determining the minimum turning radius of the vehicle through the updated turning information. Therefore, by the adoption of the technical scheme, the problem that the estimation precision of the minimum turning radius of the vehicle is poor under the condition that commercial software is not used in the related technology is solved, and the estimation precision of the minimum turning radius of the vehicle is improved.

The invention provides a geological reservoir fracture modeling grid cell determination method based on oscillator dynamic energy optimization and high-order interaction, and relates to the field of geology. According to the method, a dynamic energy optimization framework of an Ising machine is introduced into geomechanical modeling through fusion of amplitude dynamics and a high-order interaction model, the defects that in a traditional method, the physical significance of an energy function is fuzzy, and grid size effect correction is insufficient are overcome, and based on the real-value energy function of a complex oscillator variable and gradient descent, the dynamic energy optimization framework of the Ising machine is introduced into geomechanical modeling. Global convergence of mechanical parameters of the fracture network is realized, and the problem of local extremum of a traditional phase model is avoided; the fracture rigidity parameter is converted into a third-order polynomial energy item, and nonlinear characteristics of normal / shear deformation of the fracture surface are accurately described; a three-cycle method and a dynamic energy threshold value are combined, the grid size is synchronously optimized in the position-scale-azimuth dimension, the characterization error of fracture surface density and mechanical parameter anisotropy is reduced, and a standard grid format compatible with commercial software can be directly output.

The invention relates to the technical field of geological exploration, in particular to a crustal stress double-grid processing method, system and equipment and a medium. According to the invention, by establishing a complex fracture geometric structure characterization method, a complex fracture geometric structure grid subdivision method and a fluid-solid coupling double-grid spatial discretization method, fracture data in various commercial software formats can be correctly and efficiently converted into fracture grids in a four-dimensional ground stress model; the accuracy of matrix grid cutting of the crack and the conductivity algorithm and the accuracy of equivalent stiffness calculation of the unit where the crack is located are ensured, and the simulation degree and the solving efficiency of the dual-grid system for solving the four-dimensional ground stress simulation fluid-solid coupling problem are ensured. The four-dimensional crustal stress dynamic evolution simulation coupling grid is adopted, high precision can be achieved, high calculation efficiency is achieved, and industrial application is met.

The invention discloses an automatic modeling method and system for complex terrains and buildings / structures in consideration of surface roughness, and the method is realized based on an open source tool, and comprises the steps: collecting the types of terrains, buildings and roughness, and the actual measurement data of a wind field; automatically processing the topographic data through a script and generating an STL file with a transition section; simplifying the building contour and removing abnormal points by using an RDP algorithm and a standard deviation method; filtering the small building and calculating equivalent roughness; generating a building STL in combination with an open source modeling tool; a roughness surface patch is generated on the basis of the DaviportWieringa classification and the equivalent roughness; fusing the terrain, the building and the roughness surface patch; and in OpenFOAM, accurate binding of roughness and computational grids is realized through grid patch association, and wind field simulation and verification are carried out. According to the method, full-process automation is achieved, the modeling efficiency can be improved, the precision deviation of near-surface wind field simulation is reduced through a double-path roughness processing mechanism, and the problems that a traditional method is time-consuming in modeling, insufficient in precision and dependent on commercial software are effectively solved.

The application relates to an aero-engine thrust bearing multidimensional damage resistance prediction method and device, which comprises the following steps: determining the structural design information of an aero-engine thrust bearing; constructing a thrust bearing three-dimensional digital prototype with geometric feature topography, wherein the thrust bearing three-dimensional digital prototype comprises an inner ring, rotating rolling bodies and a retainer; and on the basis of the thrust bearing three-dimensional digital prototype, the aero-engine thrust bearing is subjected to damage resistance prediction according to the structural design information. The application adopts multiple dimensions to evaluate the design scheme of the bearing, is oriented to engineering design application, and the simulation environment constructed based on bearing special software and commercial software can realize cross-professional integration.

This invention discloses a method for the evolution of a tapered etching interface based on geometric visibility constraints, comprising: for each interface point, radiating outwards from the interface at a direction perpendicular to the vertical direction... θ The visibility of an interface point is determined by the angle of the ray; for the interface points determined to be visible, their etching rate is set; the etching rate is then substituted into the Narrow Band calculation flow to perform the tapered etching interface evolution. This invention transfers the concept of geometric visibility to tapered etching to construct its velocity function, achieving numerically stable and expected tapered interface evolution. The final result has an accuracy error of less than 5% compared with mainstream international commercial software. It is applicable to etching interface evolution problems in 3D process simulation, including but not limited to anisotropic etching, tapered etching, and multi-material etching processes, and is especially suitable for process simulation scenarios with geometric occlusion, suspended structures, or complex spatial morphologies.

The invention discloses a steady / unsteady hydrodynamic performance simulation method based on ship propeller shaft system propeller modeling. According to the model machine, for a propeller shaft propeller and propeller hub system, the steady open water hydrodynamic performance is calculated through a pressure-based separated solution algorithm. Based on ship propeller wake flow experiment data, parametric modeling is carried out on a wake flow field around the propeller; according to the prototype, various experimental data are input, hydrodynamic analysis commercial software Fluent is combined, and finally, on the basis of a k-epsilon turbulence model, the open water performance, the cavitation performance and the unsteady follow water dynamic performance of the structure are output. The method can be used for carrying out complete parameterized process simulation analysis on the ship propeller model which contains a plurality of hydrodynamic performance indexes and provides input from experimental data.

The application discloses a kind of based on industrial CT sequence image direct generation hexahedral grid method, comprising the following steps: 1) reading the CT sequence image of workpiece;2) the CT sequence image is preprocessed, to obtain target area with workpiece information;3) based on octree, target area is divided into several hexahedral grid;4) extracting core grid and its outer surface in hexahedral grid;5) fitting is carried out to core grid, and boundary grid is obtained;6) boundary grid unit is optimized in quality, and then the hexahedral grid corresponding to workpiece is obtained.This method uses the CT sequence image of workpiece as input, first image pre-processing, secondly, using octree divides grid, extracts core grid and outer surface, then boundary fitting is carried out, finally, grid optimization is carried out, realizes that CT image directly generates hexahedral grid, does not need third party commercial software to reconstruct the CAD model of workpiece, can improve automation degree, efficiency is promoted.

The application belongs to the technical field of computer vision, and discloses a kind of based on semantic point cloud's real scene three-dimensional visualization method and system, including step 1: point cloud processing and publishing;Step 2: visualization based on mass point cloud;Step 3: the fusion display of large scene real scene three-dimensional data and scene roaming.The application adopts multi-level slice+WebGL display technology, realizes the integration of ground and underground, indoor and outdoor in cloud environment, with colored point cloud as the base, attaching image, tilt model, panorama, vector and other data, forms a platform of independent intellectual property rights, breaks through the limitation of commercial software, reduces the threshold for use of each department, and provides support for improving the holographic display effect of basic geographic information, which can be used in natural resource monitoring, geological disaster prevention and control, city CT, forestry investigation, underground space census, power line patrol and other scene applications.The display engine of the application has great advantages in the beauty and expansibility of point cloud display.

The invention discloses a non-intrusive EDFM method and device based on a modified double-hole double-permeability model, and belongs to the technical field of oil and gas reservoir numerical simulation. The method comprises the steps that S1, core parameters are obtained through EDFM calculation according to an actual oil reservoir model; s2, constructing a commercial reservoir numerical simulation software double-hole double-permeability model equivalent to the EDFM; and S3, setting and outputting a well model: setting the perforation section on the corresponding crack grid or matrix grid according to the well type, and operating the double-hole double-permeability model. According to the non-intrusive EDFM method and device based on the modified double-hole and double-permeability model, high-precision equivalence of the non-intrusive EDFM method and device and the EDFM model in daily oil production rate and pressure field distribution is achieved, NNC or additional grids do not need to be added, and the post-processing function of commercial software can be directly utilized; meanwhile, a mainstream simulator and a complex crack scene are compatible, the calculation efficiency is improved, the modeling difficulty and time cost are greatly reduced, and unconventional oil and gas reservoir development simulation can be effectively supported.

The embodiment of the invention provides a construction CAD webpage loading lightweight method and device and a storage medium, and the method comprises the steps: extracting vector data of a CAD file based on an open source software secondary development API, and exporting the vector data as a general vector format file; performing automatic lightweight processing and format conversion on the general vector format file according to service requirements; and loading the converted lightweight data format file through a front-end open source library to realize webpage loading and interaction. A full-open-source technical scheme is adopted, commercial software authorization is not needed, and the development and use cost is reduced. And all data processing is completed in the local server, so that the data security and autonomy are ensured. Through topological optimization and lightweight conversion of the CAD data, the webpage loading speed and rendering efficiency are improved, common hardware equipment can also run smoothly, and the problems of high cost, low speed and poor safety in the prior art are solved.

The application relates to a method for establishing an ethylene device product processing cost system, and belongs to the technical field of ethylene production. The method comprises the following steps: step 1, determining the circulating processing cost of intermediate products; step 2, determining the single-pass processing cost of the ethylene device; and step 3, adding the circulating processing cost of the intermediate products determined in step 1 and the single-pass processing cost of the ethylene device calculated in step 2 to determine the processing cost of the ethylene device products. In the method for establishing the ethylene device product processing cost system, the influence of intermediate products generated in the cracking process on raw materials is considered, and the difference between the processing costs of different types of cracking furnaces in cracking different types of raw materials is considered, so that the disadvantages of the prior art in calculating the product structure model of a specific cracking furnace and specific raw materials by using commercial software are overcome.

The application is suitable for the technical field of electron backscatter diffraction crystallography characterization, and provides a non-cubic crystal system EBSD three-dimensional texture high-precision visual analysis method, which comprises seven core steps of crystallography modeling, EBSD data reading and orientation extraction, ODF calculation, IPF color key preprocessing and mapping, pole figure and inverse pole figure calculation, weak texture partition identification and standardized data output; the application, through complete non-cubic crystal system symmetry modeling, reduces the triclinic crystal system orientation calculation error to less than 5 degrees; through Lambert projection coordinate explicit output and standardized data protocol, the visual closedness and format barriers of commercial software are broken; through dynamic threshold partition, the weak texture detection lower limit is reduced to 5 degrees, and the sensitivity is improved by about 80% compared with the traditional method; the application has high precision, strong compatibility and low cost, and can be widely applied to EBSD texture characterization work in the fields of material science, metallurgy, geology and the like.

The present application belongs to the technical field of hydrogen-oxygen proton exchange membrane fuel cell, and discloses a hydrogen-oxygen proton exchange membrane fuel cell passive drainage simulation method and system, which is used to solve the problem that the existing commercial CFD software modeling cannot be applied to PEMFC passive drainage simulation. The method is based on the PEMFC structure integrated with porous titanium water transfer plate, a three-dimensional calculation model containing a cathode equivalent porous titanium water transfer plate, a cathode solid plate area and a virtual cooling water flow channel is established; the physical property parameters and boundary conditions are configured, the near dead-end operation condition is set; the multi-physical field coupling solution is carried out, and the steady-state physical field distribution and the simulation polarization curve are obtained. The system adopts a corresponding modular structure and cooperatively realizes closed-loop simulation. The present application can provide support for passive drainage type battery structure optimization, reduce research and development cost, and has important engineering application value.

This invention belongs to the field of inductance parameter extraction technology, and discloses an efficient method and system for extracting and optimizing the layout of parasitic inductance parameters of power semiconductor modules. Based on the powerful simulation capabilities and co-simulation interfaces of commercial software ANSYS and MATLAB, it achieves efficient interaction of simulation data between software, facilitating the extraction of module parasitic inductance parameters and current sharing characteristics. Utilizing effective algorithms for analyzing parasitic inductance parameters and current sharing characteristics, it provides scientific guidance for optimizing module layout. This invention has the following significant advantages: Compared to the method of "human experience + hardware debugging," this invention adopts efficient simulation development methods, avoiding frequent hardware iterations in the manufacturing and verification stages, reducing development costs, thereby improving the R&D efficiency of multi-chip silicon carbide power modules and better supporting their higher-quality and more flexible development.

An external data set operation method and set operation device, the present application relates to the bank system in the process of reconciliation, data processing, there are a large number of set operation of two files, intersection operation. Using database technology, time-consuming more. The present application is provided with three hash mapping areas in the memory of the set operation device, each hash mapping area includes a plurality of linked lists: and read the first file and the second file contrast line by line, and the hash value, the primary key and the primary key value information of each row data are stored in the hash mapping area. Then, the left and right association algorithm is carried out on each first chain table and each second chain table, and the set operation is carried out, and the position information of the content mismatch is stored in the third hash mapping area, so that the set operation of the external data is realized. No database resources are occupied, no other commercial software is used, and no external data storage, result export and other links are needed, which is 50 times faster than the existing mode, and is of great significance to the improvement of the work efficiency of the bank system.

The application provides a multi-point approximation method based on an approximate Hessian matrix for structure optimization, comprising the following steps: step 1, establishing a finite element model of a spacecraft based on an initial design of a spacecraft structure; step 2, performing mechanical prediction of the spacecraft, and the analysis mode comprises static analysis, modal analysis, buckling analysis and transient response; step 3, establishing a structure optimization mathematical model, namely, defining an optimization target, a constraint function and a design variable; step 4, establishing a sequence approximation problem considering second-order information to approximate the original problem; step 5, estimating the Hessian matrix of the multi-point approximation function by using a quasi-Newton method; step 6, selecting known points by using a neighborhood selection strategy based on the Euclidean distance; step 7, establishing convergence discrimination and an automatic optimization system; step 8, method comparison, analysis and iteration explicitness; and setting an optimization example to illustrate the flow from spacecraft design to analysis and then to optimization, and the effectiveness is verified by comparing the results of the optimization method with those of a commercial software.

The application provides a thematic map frame finishing method and system, and belongs to the field of map making. The method is to obtain a base map range file, a rectangular base map and left and right lower corner note instructions through a windowed interactive interface, analyze the base map range file to obtain base map information, obtain geographical coordinates of four corner points of an inner frame according to the base map information, obtain document coordinates of the four corner points after coordinate conversion, draw a latitude and longitude grid, the inner frame and an outer frame, place the rectangular base map into the inner frame according to the calculated positioning points, realize the fitting of the actual base map and the inner frame, group and rotate the inner frame, the outer frame, the latitude and longitude grid and the rectangular base map together and place them flat, finally generate a map name, left and right lower corner texts and a scale, and output the thematic map after frame finishing. The application solves the defects of lack of standardization and flexibility of automatic frame finishing of commercial GIS software, realizes one-step standardization frame finishing, and improves the production efficiency and automation level.

This application discloses an authorization management method, apparatus, system, device, and computer storage medium. The method includes: an authorization slave node obtaining machine identity information of the server in the distributed system to which it belongs, and sending the machine identity information to a database; an authorization master node obtaining the machine identity information from the database, generating an authorization code based on the machine identity information, and sending the authorization code to the database; an authorization center obtaining the authorization code and generating an authorization file based on the authorization code, and sending it to the database; an authorization master node parsing the authorization file to obtain authorization information; and authorization slave nodes performing authorization operations on requests for commercial software usage rights from the server to which they belong, based on the authorization information. According to the embodiments of this application, unified authorization management of commercial software in a distributed system can be achieved.

The invention relates to a power transmission tower line system damage early warning method in severe convection weather, which comprises the following steps: step 1, acquiring the wind speed and rainfall in real time when severe convection weather occurs in an area where a power transmission tower line is located; converting the wind speed and the rainfall into a coupling force load of a corresponding part of a power transmission tower line according to a calculation method of Technical Regulations for Design of a Tower Structure of an Overhead Power Transmission Line DL / T 5486-2020; step 2, establishing a 110kV double-loop linear power transmission tower line model in commercial software Ansys, and after applying the coupling force load obtained in the step 1 to a tower line system, calculating stress at each dangerous point position of a main material and a ground wire; 3, evaluating the risk level of damage of the power transmission line tower under the current weather based on a statistics related theory; the method has the advantages that weather is monitored in real time, the double-loop power transmission tower line model is constructed, and deviation is effectively reduced.

The invention relates to an application software input and output file conversion and storage method and a software system, and belongs to the technical field of computer software data security and file processing, and the software system comprises an information definition module, a file reading module, a format conversion module and a file output module, the information definition module is used for storing and managing a suffix name number table, an information code table and a mapping function which are customized by a software development company; the file reading module is used for reading an original file to be converted in a binary mode; the format conversion module recombines and fills the data of the original file according to the defined conversion storage format; and the file output module is used for writing the converted data into a new file and storing the converted data with a unified suffix name. According to the invention, on the premise that the original architecture of the application software is not influenced, unified format conversion and data content protection can be carried out on the input and output files of the software, so that core data and an algorithm are effectively prevented from being read easily, and the security of the commercial software is enhanced.

The invention discloses a structure operation parameter identification method and system based on MATLAB, and belongs to the technical field of modal parameter identification technology and MATLAB program development, and the method comprises the following steps: constructing a structure model; a multi-channel response signal is imported, and signal preprocessing is carried out; selecting a modal parameter identification algorithm, and identifying core parameters including inherent frequency, damping ratio and vibration mode data; after the recognition algorithm is completed, collaborative output of parameters, graphs and data files is carried out, and static vibration mode visualization and vibration mode animation display are realized; the steps are respectively and correspondingly realized by a structure construction module, a signal processing module, a parameter identification module and a structure visualization module which are formed by the system. According to the invention, based on MATLAB environment development, commercial software authorization and hardware cost are greatly saved, and through algorithm white box, the technical threshold is reduced, and teaching popularization and industry innovation are assisted.

The application relates to a calculation method of the capacitance between a permanent magnet synchronous motor stator coil and a stator core. N winding coils of the same size arranged side by side in front of the stator core are regarded as ideal cylindrical conductors, one of the conductors and other two conductors adjacent to the one conductor are taken as a model for calculating the capacitance value between a single winding coil and the stator core, and the three adjacent conductors are conductor 1, conductor 2 and conductor 3 in turn. The calculation process comprises the following steps: step 1, calculating the coordinates of equivalent line charges of the three conductors; step 2, calculating the spatial potential distribution in the region x<‑D based on the mirror charge method and the superposition theorem; step 3, calculating the potential on the surface of the conductors; step 4, calculating the capacitance value of the conductor 2 to the stator core in the three-conductor model; and step 5, calculating the total capacitance of the winding to the stator core. The calculation method is simple, and the calculation result can be used as a supplement and a comparison of the calculation result of the commercial software without the need of purchasing and learning the commercial software.

The application discloses a target positioning method based on monocular depth estimation and scale recovery, and belongs to the field of aerial image processing, and specifically comprises the following steps: taking an image sequence actually shot by a UAV as the basis, using existing commercial software to produce a depth estimation data set under the UAV perspective; obtaining a relative depth map of a scene through an unsupervised monocular depth estimation network; estimating the height of a camera based on scene segmentation and a two-step ground point optimization algorithm, and then comparing the height with a prior real camera height to obtain a scale factor of the scene; combining the scale factor and the relative depth to obtain the absolute depth of the scene; detecting common targets through a target detection algorithm; and finally positioning the targets using the principle of pinhole imaging. The application combines the absolute depth estimation method and the target detection method, realizes positioning of common targets in a low-altitude UAV shooting scene, and has high accuracy.