20 results about "Planar model" patented technology

The invention discloses an indoor scene three-dimensional reconstruction method based on deep fusion and confidence modeling, and belongs to the technical field of computer vision. According to the method, composite data frames such as a color image, a depth map, an IMU (Inertial Measurement Unit) and a camera attitude are comprehensively utilized to carry out regional three-dimensional reconstruction on an indoor scene: firstly, the scene is divided into a smooth region (such as a wall, a ground, a ceiling, a glass plane, a mirror surface, a blackboard and other planes) and a complex curved surface region; aiming at the smooth area, adopting geometric prior guide plane fitting provided by a visual large model, and combining sensor attitude information to quickly reconstruct a regular plane model; for a complex curved surface area, a multi-frame point cloud fusion strategy is adopted to accumulate different view angle information, and a deep residual error refining network is utilized to recover curved surface details, so that a high-precision curved surface model is obtained. According to the method, the three-dimensional structure of the indoor scene can be efficiently reconstructed, the global framework of the smooth area is reserved, and the details of the surface of a complex object are depicted in detail.

This invention discloses a method for verifying the drag performance of a penguin-shaped biomimetic AUV, comprising the following steps: establishing a computational domain for the penguin-shaped biomimetic AUV; meshing the computational domain of the penguin-shaped biomimetic AUV; setting boundary and physical conditions for the computational domain of the penguin-shaped biomimetic AUV; setting the outflow surface of the computational domain of the penguin-shaped biomimetic AUV as a pressure outlet, and the inflow surface, upper, lower, and side surfaces as velocity inlets, setting the mid-longitudinal section as a symmetry plane, and setting the AUV model surface as a wall surface; calculating the viscous drag of the penguin-shaped biomimetic AUV when it navigates in still water, and using the computational fluid dynamics software STAR-CCM+ to predict the drag at three modeling stages for three types of AUV models.

The application discloses a laser radar SLAM method based on a multi-modal structure semantic feature, and comprises the following steps: acquiring laser radar point cloud data; performing cylindrical point cloud segmentation on the laser radar point cloud data based on an ERFNet method; performing ground point cloud segmentation based on a BEV projection view method; performing planar point cloud segmentation based on a region growing method; fitting the cylindrical point cloud into a cylindrical model, and fitting the ground point cloud and the planar point cloud into planar models respectively; acquiring a matching relationship between different cylindrical models, and acquiring a matching relationship between different planar models, and constructing a structure semantic map; storing the structure semantic map based on a voxel plane; and updating the structure semantic map based on a model matching and map incremental updating algorithm. The application effectively improves the laser radar SLAM positioning precision, and proposes an intuitive multi-modal structure semantic map, so that the construction and real-time updating of three kinds of structure semantic model maps can be realized.

The present application discloses a method for processing a plane model, which includes: drawing multiple sets of plane model texture constraint maps and determining the texture replacement range between components; making a set of standard plane models and exporting corresponding driver files; sorting out the composition logic of the standard plane model, formulating a component hierarchical structure diagram and a standard component level ID identification table; splitting and reorganizing the multiple sets of plane model texture constraint maps according to the composition logic, the component hierarchical structure diagram and the standard component level ID identification table, generating multiple reorganized plane models, and driving the reorganized plane models with the driver file. The present application also discloses a plane model processing system, an electronic device and a computer-readable storage medium. In this way, the rendering freedom of the plane model can be improved and the production cost and cycle can be reduced.

The invention discloses a point group action model calculation method for piston ring coating crack calculation in the technical field of mechanical design. The method comprises the following steps: selecting a two-dimensional non-local thermal-mechanical coupling model; acquiring initial parameters of the piston ring coating-matrix plane model; obtaining load parameters of the piston ring coating-matrix plane model; a programming language is used for building a piston ring coating-matrix plane model, point group division is carried out, and neighborhood points are determined; boundary condition constraints are applied to the piston ring coating plane model; using a programming language to set tiny defects in the piston ring coating-matrix plane model; and carrying out visualization processing on the calculation result output in the previous step by utilizing visualization software. According to the method, the working environment of the piston ring coating is simplified, an ideal two-dimensional model is established, and the crack initiation and extension conditions of the piston ring coating under the thermal-mechanical coupling effect and different load conditions are simulated and analyzed.

The invention discloses a rendering method and device, a storage medium, equipment and a program product, and the method comprises the steps: firstly extracting transparent channel data of a source special effect, and generating at least one static texture containing the transparent channel data; then a planar model is obtained, texture coordinates of the planar model are annular texture coordinates, and the left side and the right side of the texture can be closed and connected in a three-dimensional space when the planar model carries out texture sampling; providing a dynamic rendering texture according to at least one static texture containing the transparent channel data generated by extracting the transparent channel data of the special effect; performing material rendering on the planar model by using the dynamic rendering texture; finally, the texture coordinates of the plane model are driven to roll in the annular direction so that the source special effect can be played on the plane model in a loop mode, and the annular direction is determined based on the annular texture coordinates. According to the rendering method provided by the invention, seamless circulation of the special effect can be automatically realized, and the original detail effect of the source special effect is reserved.

The invention provides a layout method and device for a two-dimensional cutting component in a special-shaped plane. The layout method comprises the steps that initialization data used for layout of the special-shaped plane are obtained; creating a component plane model based on the layout plane data and the two-dimensional cutting component data; calculating the geometric dimensions of the segmentation units according to the two-dimensional cutting component data and the industrial seam data; based on the component plane model, the geometric dimensions of the segmentation units and the laying constraint, segmentation lines are created, and an orthogonal segmentation line set located in the special-shaped plane is obtained according to the component plane model and the segmentation lines; and segmenting the component plane model according to the orthogonal segmentation line set to complete the cutting layout model. When the method is applied to the two-dimensional cutting component layout of the special-shaped plane, a complicated special-shaped layout plane can be processed, the two-dimensional cutting component layout of the special-shaped plane, which takes the complete two-dimensional cutting component as a main part and takes the special-shaped component units as an auxiliary part, can be quickly and accurately obtained, and the irregular component required by the edge of the special-shaped plane is generated.

In the design of various structures, this system enables the automatic generation of flags that reflect the attribute information of the structure included in the 3D model. [Solution] The automatic calculation device 1 includes a 3D model acquisition unit 10a that acquires a 3D terrain model and a 3D plan model representing the current terrain and plan, and a 3D structure model representing the structure; an attribute information acquisition unit 10b that acquires attribute information of the structure included in the 3D structure model and attribute information of the structure input from the user; an automatic drawing unit 10c that automatically draws flags based on the attribute information acquired by the attribute information acquisition unit 10b; and a display unit 11 that displays the flags drawn by the automatic drawing unit 10c together with the shape of the structure model.

This invention discloses a slope surface displacement inspection and monitoring system and method based on grouped planar target points and robust fusion of multiple images. The system includes: a target point layout module, a planar coordinate modeling module, an image acquisition and processing module, a target point identification module, a homography solution module, a matrix optimization module, a displacement inversion module, a fusion module, an early warning module, and a data management module. This invention uses uniquely coded target points, which significantly improves the reliability of automatic identification and cross-time-series matching of slope monitoring points. By grouping slope target points according to local coplanar features, this invention avoids errors caused by establishing a unified planar model for complex slopes as a whole, thus improving the accuracy of geometric modeling.

The application provides a layout method and device of a two-dimensional cutting component in a special-shaped plane, comprising: obtaining initialization data for layout of a special-shaped plane; creating a component plane model based on layout plane data and two-dimensional cutting component data; calculating geometric dimensions of a segmentation unit according to two-dimensional cutting component data and seam data; creating a segmentation line based on the component plane model, the geometric dimensions of the segmentation unit and laying constraints; obtaining a set of orthogonal segmentation lines in the special-shaped plane according to the component plane model and the segmentation line; and segmenting the component plane model according to the set of orthogonal segmentation lines to complete a cutting layout model. Application of the method to two-dimensional cutting component layout in a special-shaped plane can process complex special-shaped layout planes, and can quickly and accurately obtain a two-dimensional cutting component layout of a special-shaped plane mainly composed of complete two-dimensional cutting components and supplemented by special-shaped component units, and generate irregular components required by a special-shaped plane edge.

The invention relates to a site parametric modeling method and device, computer equipment, a readable storage medium and a program product. The method comprises the following steps: acquiring site modeling parameters corresponding to an initial plane model of a target site, wherein the site modeling parameters are determined according to the form of the initial plane model; generating a form change curve of the initial plane model based on the site modeling parameters and a preset curve generation tool; segmenting the initial plane model based on the morphological change curve to obtain a plurality of sub-site models; and performing grouping processing on the sub-site models through a preset grouping strategy to obtain a target site modeling model corresponding to the target site. By adopting the method, the field modeling efficiency can be improved.

To provide a simulation method, simulation device, and program using a large model that reflects actual specifications.SOLUTION: A simulation device includes: an acquisition unit that acquires geometric shape information of an uneven surface of an object; a creation unit that associates the geometric shape information of the uneven surface with a three-dimensional planar model composed of elements that can be numerically analyzed by a computer, to create a reference uneven surface model composed of elements that can be numerically analyzed, and further creates an uneven surface model of a preset size larger than the reference uneven surface model by duplicating the reference uneven surface model and joining the plurality of reference uneven surface models; and an analysis unit that brings the uneven surface model and a structural model composed of elements that can be numerically analyzed into contact with each other, moves the structural model relatively over the uneven surface model in a contact state, and acquires a physical quantity generated in at least one of the structural model and the uneven surface model when the structural model is moved relatively over the uneven surface model.SELECTED DRAWING: Figure 1

The invention discloses a model rendering method and device, electronic equipment and a computer readable storage medium, according to the embodiment of the invention, ambient light information of a game scene is obtained, a planar model is constructed, and the display view angle of the game scene is a fixed view angle; based on a target vector of a virtual camera facing the game scene, determining a world space coordinate corresponding to the planar model in the game scene; controlling a target light source in the game scene to rotate towards the virtual camera to obtain a target light direction corresponding to the target light source, and determining light and shadow effect information in the target light direction based on the target light direction and the ambient light information; and based on the light and shadow effect information, the material information of a target virtual object and the world space coordinates, performing rendering processing on the planar model to obtain the target virtual object configured for a game picture with preset picture quality of the game scene. According to the embodiment of the invention, the presentation effect of the three-dimensional object with medium and low image distribution quality can be improved, and the rendering performance consumption is reduced.

The application discloses a three-dimensional weaving forming method of a marine propeller blade preform, which comprises the following steps: firstly, converting an original blade three-dimensional model with bending, twisting, variable cross-section and variable thickness characteristics into a planar model by means of three-dimensional software; and secondly, taking a thick area of a blade root in a planar form as a starting weaving section, and weaving according to a four-step three-dimensional multi-directional weaving process. The three-dimensional weaving forming method can realize near-net-size integral forming of a large-size propeller blade with complex characteristics such as bending, twisting, variable cross-section and variable thickness, effectively solves the problems of poor interlaminar bonding strength of conventional laminated composite blades and serious secondary processing damage, and guarantees the stability of the overall mechanical properties of the blade.

This invention provides a method, apparatus, device, and storage medium for determining the offset of brush angles. The method determines the position of the geometric center line of the commutator and the position of the brush center line in a planar model of a single-phase series motor. The geometric center line is offset from the brush center line by a predetermined angle along the direction of armature rotation of the single-phase series motor. This causes the commutating element of the single-phase series motor to generate a commutating electromotive force (EMF) when cutting the main pole magnetic field. The commutating EMF is opposite in direction to the reactive EMF and rotational EMF generated by the commutating element cutting the armature magnetic field, and they cancel each other out. This solves the problem of potential sparking between the commutator and the motor brushes when the motor commutation is poor.

The invention provides a warehouse-in and warehouse-out assembly line type settlement and access control linkage method and system for an intelligent warehouse, and relates to the technical field of intelligent warehousing, and the method comprises the steps: receiving a warehouse-out operation request for target goods, generating a corresponding to-be-executed warehouse-out task, and according to the to-be-executed warehouse-out task, executing the warehouse-out operation request; analyzing and acquiring a specific storage location identifier occupied by the target cargo in the warehouse storage plane model, retrieving coordinates of an original closed polygon boundary vertex sequence uniquely corresponding to the storage location identifier or describing a plane contour of the storage location identifier, and performing adaptive compression on the original vertex sequence by applying a polygon simplification algorithm, and generating a simplified polygon boundary vertex sequence coordinate. Through a series of automatic, digital and linkage technical means, the problems of risk release without settlement, low efficiency and the like are solved, and finally the safe, efficient and accurate intelligent management and control effect is achieved.

This invention discloses a method and system for path planning in 3D surface printing. The method includes: surface scanning, using a 3D laser scanner to scan the target surface; point cloud data preprocessing, preprocessing and optimizing the original point cloud data; model design, designing the model of the product to be printed and exporting it as point cloud data as the base point cloud data for registration; surface mapping, registering the base point cloud data of the model to be printed with the target point cloud data of the scanned surface model, mapping the planar model onto the surface; Z-axis coordinate change calculation, calculating the change of the Z-axis coordinate with the surface height during printing on the surface; and path planning, performing path planning processing on the point cloud data obtained after surface mapping, sorting the coordinates according to priority based on the required path to obtain the coordinates of each point on the complete printing path. This invention can improve the accuracy and detail of 3D printing.

The invention is suitable for the technical field of aerospace machinery processing, and provides a preparation method of a high-pressure-bearing aerospace engine thin-wall cylinder, which mainly comprises the steps of modeling and forming mold production, decomposition of a digital model into a plane model drawing, surface plate material treatment, plate material welding and splicing, blank material treatment, heat treatment and compression molding, and electron beam welding forming. The method comprises the following steps: modeling a cylinder of a water-cooling double-layer structure, decomposing the cylinder into a plane model drawing through a digital model, selecting straight plate materials, carrying out plane milling and flow channel processing, fully fitting and welding the two plate materials through vacuum diffusion welding, and carrying out heat treatment to form a semicircular cylinder. The two semicircular barrels are welded through vacuum variable-focus electron beam welding, so that rotary body welding is changed into plane welding, the purpose of welding multiple pieces at a time can be achieved, the rate of finished products can be increased, a modular machining production mode is adopted, the production period can be effectively shortened, the production cost is reduced, and the production efficiency is improved. And the overall production efficiency is improved.

To address the Z-direction drift problem during 3D LiDAR outdoor road mapping, the present invention discloses a 3D LiDAR odometry optimization method suitable for planar roads. The method comprises: extracting a frame of point cloud, removing point cloud distortion, and performing point cloud matching to obtain the robot's offset between two frames; proposing a road ground point extraction method to extract road seed points from the extracted ground point cloud; projecting the seed point set into a global coordinate system and using the singular value decomposition method to perform plane fitting on the seed point set to establish a plane model; using the position coordinates obtained from point cloud matching as predicted values, and the position coordinates calculated from the fitted plane model as observed values, performing Kalman filtering, and correcting the LiDAR odometry in real time. The present invention can effectively optimize the Z-axis drift problem generated when a mobile robot maps on a flat road, ensuring the accuracy of the mobile robot's mapping.

The invention provides a model conversion method and apparatus, and an electronic device. The method comprises the steps of obtaining a target image including a two-dimensional pattern; mapping the two-dimensional pattern in the target image on a preset plane model to obtain a mapped preset plane model; wherein the model shape of the mapped preset plane model is matched with the two-dimensional pattern in the target image; preprocessing the mapped preset plane model to obtain a target plane model; and increasing the display thickness of the target plane model to obtain a three-dimensional model. In the mode, the two-dimensional pattern in the target image is mapped on the preset planar model, then the display thickness of the planar model is increased, and the two-dimensional pattern can be converted into the three-dimensional model, so that the operation of converting the two-dimensional pattern into the three-dimensional model is simplified, and the efficiency of converting the two-dimensional pattern into the three-dimensional model is improved.