15 results about "Surface type" patented technology

The present application relates to the technical field of optical aspheric surface, especially points to a kind of free curved surface characterization method based on CGH lens zero position compensation detection optical path, with the detection of free curved surface as the guide, based on zero position compensation detection principle, according to ray tracing method, Snell's law, diffraction principle and equal optical path principle, using the parameters required by interferometer incident wave front as plane wave, compensator as single CGH lens zero position compensation detection system indirectly characterizes free curved surface shape, by using XY polynomial and Zernike standard phase polynomial, the mathematical description of free curved surface is realized in design stage can determine its measurement scheme, and according to the characterization method self-defined a kind of aspheric surface type, called zero position free curved surface.The free curved surface characterization method improves the degree of freedom of free curved surface shape and the feasibility of zero position compensation method, reduces the detection difficulty of free curved surface shape, realizes the function of zero position free curved surface design can be detected.

The invention discloses a shape error correction method for free-form surface machining, which comprises the following steps of: analyzing the path characteristics of an original cutter through a linearization error theory, establishing a slow cutter servo turning cutter path simulation model, and describing the cutting path of the cutter by adopting an Archimedes spiral. And on the basis, cutter radius compensation is carried out, cutter contact data after compensation are obtained, and the accuracy of a cutting track is ensured. Then, obtaining point clouds of the free-form surface to be processed, and obtaining source point clouds and target point clouds respectively; in order to realize reliable matching between the source point cloud and the target point cloud, point cloud coarse registration is used for coarse registration, and then point cloud fine registration is used for fine registration. And finally, calculating a shape error through a least square method, and applying the shape error to correction so as to obtain a processed free-form surface type.

The invention provides an automatic identification method and system for contour features of a blasting area of bench blasting, and the method comprises the following steps: defining a contour surface type of blasting design based on blasting design requirements; intercepting a target three-dimensional surface patch excavation body from the three-dimensional terrain or the design model, and determining the construction sequence of the target three-dimensional surface patch excavation body relative to other excavation bodies; obtaining normal vectors and geometric features of each patch of the target three-dimensional patch excavation body, and identifying the contour surface type to which each patch belongs according to the defined contour surface type; and extracting and fitting to generate contour lines and contour points based on the identified various contour surfaces. According to the method, the time for manual identification in the blasting area is effectively shortened, the data processing efficiency is improved, and application and development of automation and intelligence of intelligent blasting design in surface mines, large capital construction projects and the like are promoted.

The invention provides a modeling method for a three-period minimum curved surface structure, and relates to the technical field of three-dimensional curved surface modelling, and the method comprises the steps: determining the curved surface type and function parameters of the three-period minimum curved surface structure; generating a curved surface point cloud based on the curved surface type and the function parameters, and obtaining feature curve point set data by intercepting intersection points of the equidistant plane and the curved surface point cloud; performing duplicate removal and sorting on the characteristic curve point set data by utilizing a point location sorting method to obtain optimized characteristic curve point set data; and on the basis of the optimized characteristic curve point set data, generating a characteristic curve, and performing model construction to obtain a solid model, thereby completing reverse modeling of the three-period minimal curved surface structure. According to the method, the problems of insufficient curved surface precision, poor model editability and high post-processing difficulty in the existing three-period minimal curved surface structure modeling method are solved.

The invention relates to the technical field of optical element machining, and particularly discloses an x offset value adjusting method and device for aspheric surface, spherical surface and free-form surface machining and a storage medium. A corresponding aspheric coefficient is input for programming, and the aspheric arc height is determined to be correct; acquiring aspheric surface shape errors, and when the surface shape errors are in an M shape, a V shape, a W shape and an inverted V shape, changing the curvature radius R to convert the aspheric surface shape errors into the V shape or the inverted V shape; obtaining a PV value of a V-shaped or inverted V-shaped surface error and a corresponding x coordinate; in the aspheric software, a z value is input, a deviation value of an aspheric surface is calculated, for the aspheric software which completes parameter programming, an x coordinate is input, a corresponding vector height value z value is obtained, an x + x coordinate is input, a corresponding vector height value z + z is obtained, and x is a cutter deviation value generated by a machine tool during machining; inputting a cutter deviation value in the corresponding cutter number parameters of the single-point machine tool; and after aspheric surface measurement analysis, cutter radius or program radius adjustment is carried out according to the R.

The application provides a surface type detection device and method for aspherical cylindrical lenses, comprising: a placing table, the placing table comprising an adjusting platform, a Y-axis displacement table arranged on the adjusting platform and movable along a Y-axis direction, an X-axis displacement table arranged on the Y-axis displacement table and movable along an X-axis direction, and a C-axis displacement table arranged on the X-axis displacement table and rotatable; and a detection probe arranged above the placing table; wherein the detection probe contacts the aspherical cylindrical lens through a probe needle, collects three-point coordinates of a predetermined position relationship, constructs a trigonometric function relationship and obtains a deflection angle, adjusts the deflection angle through the C-axis displacement table rotation, and adjusts the aspherical generatrix to a direction perpendicular to the detection path of the detection probe. The application adjusts the deflection angle through rotation, so that the aspherical generatrix and the detection path are in a perpendicular direction, thereby improving the precision of surface type compensation, improving the detection efficiency, and reducing the cost.

The invention provides a surface type in-situ measurement method and a thinning machine, and the method comprises the steps: obtaining and collecting a plurality of point data of a flat part located on a rotary table of the thinning machine, each point data comprises a point position and height information corresponding to the flat part, and the plurality of point data are collected on M ring layers with the center of the flat part as the center, n pieces of point data are collected in each circle layer; among all the point data in any two adjacent circle layers, on the basis of the point position contained in each point data and other adjacent point data, carrying out line connection so as to divide a plurality of independent areas which are not affiliated to each other between the two adjacent circle layers; determining an area surface type corresponding to each independent area based on height information contained in the point data, and further determining a surface type of the flat piece; and identifying the surface type of the flat part, and determining the surface type of the flat part. According to the invention, the problems of inaccurate surface type measurement of the flat part and low offline measurement efficiency in the prior art are solved.

The invention relates to the technical field of surface shape correction, in particular to a surface shape index measurement model construction method and a development condition evaluation method and system, and the method comprises the steps: carrying out the key point marking of a side face image, so as to make a standard side face image data set; generating a structural relationship among the key points corresponding to different standard angles based on the plurality of key points, and generating an optimized Gaussian heat map containing an elliptical heat map corresponding to each key point based on the structural relationship; introducing a GAT layer to take the key points as nodes, taking the structural relationship between the key points as edges, and calculating attention weights between the nodes and neighbor nodes to perform global space optimization; and performing supervised learning on the optimized Gaussian heat map and the real heat map based on an MSE loss function and an angle loss function to obtain a trained surface type index measurement model. The method has the effect of realizing accurate positioning of the side face key points so as to improve the calculation accuracy of the development angle.

The invention discloses a quadric surface fitting method for a three-dimensional model, electronic equipment and a storage medium. The method comprises the following steps: calculating grid information in a triangular surface grid of a three-dimensional model, wherein the grid information at least comprises a normal direction of a triangular surface, a normal direction of each vertex, a main curvature and a main direction; extracting a multi-target feature based on the grid information, wherein the multi-target feature comprises a dihedral angle feature, a curved surface type feature and a cross field rotation feature corresponding to a main direction; performing feature segmentation on the triangular surface grid according to the multi-target features to obtain a plurality of sub-blocks; and fitting and merging the plurality of sub-blocks to obtain a target quadric surface. By using the scheme of the invention, quadric surface processing with accurate segmentation, efficient combination and accurate fitting can be realized.

The invention discloses an SLM (selective laser melting) support-free forming method for low-angle feature self-adaptive recognition and shape property regulation and control, which has the following beneficial effects: (1) according to data processing, process configuration and forming processes of a selective laser melting technology, the shape property regulation and control are realized; parameters related to part placement, low-angle area distribution, angle feature self-adaptive identification, key process and forming strategy are optimized, and a reliable forming whole-process solution is provided for support-free forming of complex curved surfaces and closed runners. (2) through the angle feature adaptive identification and shape regulation and control method, complex curved surface feature discrimination and adaptive process configuration can be realized, various curved surface types are divided according to the curved surface features, the forming morphology and size precision of different curved surface features are improved, adaptive identification and shape regulation and control of a complex curved surface structure are realized, and the method is suitable for large-scale popularization and application. The problems of existing low-angle single energy input forming quality and stability are solved, the part forming quality is improved, the component design freedom degree is increased, and data processing and material cost is reduced.

The embodiment of the invention discloses a machining control method, machining equipment, a system and a storage medium. The method comprises the steps that a measurement area and measurement density corresponding to a to-be-machined area of a to-be-machined object are obtained; wherein the to-be-machined area comprises a rotating curved surface; determining a plurality of measurement points based on the measurement area and the measurement density, and generating a rotating curved surface model corresponding to the to-be-processed area according to the plurality of measurement points; in response to an operation of placing the to-be-processed image on the rotating curved surface model, generating a three-dimensional preview model; wherein the three-dimensional preview model is used for providing preview for the processing effect of the to-be-processed area. Therefore, when an object of a rotating curved surface type is machined, the machining effect can be displayed for a user more comprehensively and accurately through the three-dimensional preview model, so that the phenomenon of machining errors is reduced, and the effect of improving the machining reliability is achieved.

Various embodiments of a three-dimensional (3D) tactile map system and methods of implementing the system are described. In one example, the tactile map system includes a map base having a substantially planar substrate defining an x-y plane. The map base includes a top base surface and a bottom base surface, where the top base surface includes a ground surface texture. The tactile map system also includes a 3D scaled representation of a structure attached to the top surface of the map base. The 3D scaled representation can be configured with dimensions that are in proportion to the structure and extend in a z-direction from the base. The z-direction being orthogonal to the x-y plane. The 3D scaled representation includes a plurality of identified surfaces, each of the plurality of identified surfaces having a surface type of a plurality of surface types, each surface type corresponding to a selected surface texture.

The invention provides a surface type detection device and method. The surface type detection device comprises a movement device (33) and a two-axis detection device (34), the two-axis detection device (34) is mounted on a main body rack (13) of the movement device (33), and the laser tracker target ball (26) is arranged at the end part of a rotating shaft (24) of the two-axis detection device (34) and is used for carrying out signal interaction with a laser tracker (1) placed in the large-diameter ring opening workpiece (3) so as to form spatial position information of the laser tracker target ball (26); and according to the spatial position information of the target ball (26) of the laser tracker, obtaining the surface type detection data of the end surface of the large-diameter ring-opening workpiece. The device depends on the laser tracker and is combined with the ring opening end face moving device, and finally light and high-precision detection of equipment is achieved. Compared with a traditional suspension wire electrical measurement method and other methods, the method is higher in precision and more convenient.

The invention relates to the technical field of building information model data processing, in particular to a part batch nesting method based on a BIM model. The method comprises the steps that a part model is imported through a BIM visual programming platform, geometric information is extracted, and after surface discrete points are generated, the SVD plane fitting algorithm is adopted to judge whether a part is of a plane type or a curved surface type; basic grouping is completed based on a judgment result, and secondary filtering is carried out in combination with non-geometric attributes to realize refined grouping; and full-process automatic processing of projection expansion-attribute labeling-format exporting is carried out on curved surface parts, simplified process processing is carried out on plane parts, and a part information association list is synchronously generated. According to the method, through automatic identification classification and differentiation parallel processing channels, batch automatic processing of parts is realized, the curved surface expansion precision is ensured, calculation resource allocation is optimized, coherent circulation from a BIM design model to production processing data is ensured, and the collaborative efficiency of intelligent manufacturing is improved.

The application discloses a slope anchoring structure parameterized design system and method, wherein a benchmark anchoring structure design module constructs a benchmark anchoring structure model according to selected parameters; a plane anchoring structure design module calls the benchmark anchoring structure design module to construct a plane anchoring structure model group and a plurality of special plane anchoring structure models based on attribute values of a plane type slope surface, and obtains a plane anchoring structure model composed of a systematic plane anchoring structure model and a random plane anchoring structure model; the plane anchoring structure model is instantiated; a curved surface anchoring structure design module calls the benchmark anchoring structure design module to construct a curved surface anchoring structure model group and a plurality of special curved surface anchoring structure models based on attribute values of a curved surface type slope surface, and obtains a curved surface anchoring structure model composed of a systematic curved surface anchoring structure model and a random curved surface anchoring structure model; and the curved surface anchoring structure model is instantiated. The system is suitable for systematic slope anchoring structure design scenes and requirements.