15 results about "Projection line" patented technology

The embodiment of the present disclosure relates to a kind of steel anchor beam space cable conduit assembly positioning method.The method comprises: arranging platform on hardened ground, and arranging first longitudinal and transverse reference line on the platform;According to the first longitudinal and transverse reference line on the platform, tooling structure is arranged on the platform, and the tooling structure is used for the assembly positioning of cable conduit;Second longitudinal and transverse reference line is arranged on wallboard, and steel bracket is positioned according to the first longitudinal and transverse reference line on the platform and the second longitudinal and transverse reference line on the wallboard;Cable conduit is initially arranged on wallboard by tooling structure;According to the preset horizontal bridge direction angle, the theoretical projection line of cable conduit on platform is determined, and baseline is hung on the intersection of cable conduit, the position of cable conduit in horizontal direction is adjusted by tooling structure, to make baseline intersection on theoretical projection line;According to preset angle, the position of cable conduit in vertical direction is adjusted.The positioning of the embodiment of the present disclosure to cable conduit is accurate and efficient.

The application discloses a saw blade detection system based on multi-source data fusion, and particularly relates to the technical field of saw blade detection; the saw blade detection system is characterized in that: side surface image data of a saw blade is collected, tooth back surface projection line features and edge geometry features are extracted, initial visual feature data of the saw blade is established; side surface image data is continuously collected in actual processing, side edge projection line features and edge position changes are compared and analyzed, visual wear data is determined; main shaft current data is synchronously collected and current change trends and variability are analyzed, current wear data is determined; normal wear and tooth loss abnormal trends of the saw blade are analyzed based on the visual wear data and the current wear data, visual degradation features and current abnormal features are obtained; visual and current fusion feature data is calculated in combination with product processing unqualified rate, and a saw blade scrapping trigger threshold is established; finally, fusion feature data and the scrapping threshold are compared in real time, so that the saw blade scrapping or replacement time is determined; and the application improves the precision and reliability of saw blade state monitoring.

This application relates to the field of data analysis technology, and in particular to a method, apparatus, computer device, storage medium, and computer program product for extracting profile lines from oblique photogrammetry data. The method includes: dividing the oblique photogrammetry data into multiple block files according to a geographic grid, with each block file containing a root node corresponding to a specific block file, and hierarchically storing node files corresponding to child nodes derived from the root node; identifying target block files and target node files that intersect with the projection line data; reading specific geometric data from the target node files, with the geometric data associated with profile line extraction; using a preset intersection algorithm to traverse the geometric data in all target node files to obtain profile points, and connecting the profile points to generate target profile lines. This method can improve the efficiency of profile line extraction in large-scale oblique photogrammetry data and reduce the computational load of profile line extraction.

This invention relates to the field of shipbuilding technology and discloses a method for lofting and unfolding a sloping cylindrical structure, comprising the following steps: S1, creating a side view and a normal section view; S2, obtaining the minor axis projection line HV in the side view; S3, obtaining the minor axis section projection line H1V1 and the major axis section projection line P1W1 in the normal section view; S4, obtaining the major axis projection line PW in the side view; S5, drawing perpendicular lines from points P and W to the center line of the cylinder to obtain line segment QT; S6, dividing the normal section view into equal parts, projecting each division point onto line segment QT to obtain equal division projection points, and unfolding the sloping contour to obtain unfolding points; S8, repeating S7, smoothly connecting each unfolding point; S9, obtaining the generatrix unfolding points, connecting two generatrix unfolding points to complete the lofting and unfolding diagram of the sloping cylindrical structure. Using the minor axis projection line and the major axis projection line as a reference, the lofting and unfolding of the cylinder is achieved, realizing accurate lofting and unfolding of any sloping cylindrical structure, facilitating cylinder installation.

This invention discloses a saw blade detection method and system based on multi-source data fusion, specifically relating to the field of saw blade detection technology. By simultaneously acquiring high-speed visual images of the saw blade's front and side views and spindle current signals, the initial tooth profile reference features of the saw blade are extracted. Furthermore, the system monitors in real time changes in the straightness of the projection line, the amount of cutting edge retraction, and abnormal changes in the current signal during the saw blade cutting process. By fusing visual and current data analysis, the normal wear and degradation trend of the saw blade and abnormal tooth loss characteristics are observed, thereby achieving accurate identification of saw blade wear or tooth loss conditions. A comprehensive evaluation is then performed based on the defect rate of sawn products, ultimately outputting an accurate and reliable saw blade replacement control signal. This invention effectively improves the accuracy of saw blade condition detection and the timeliness of replacement decisions, avoiding processing quality problems and ensuring production efficiency and processing safety.

An electronic device, a method and a computer program product for guiding positioning of the electronic device during image capturing. The method includes, while an electronic device is in an image capturing mode using a camera, determining if a first preview image contains a face of a subject whose image is to be captured. In response to determining the preview image contains the face of the subject, the method includes calculating a deviation angle based on an eye level of the target subject and a projection line of a lens of the camera and determining if the deviation angle is within a deviation angle range. In response to determining the deviation angle is not within the deviation angle range, the method includes determining a first direction to move the electronic device to reduce the deviation angle and outputting an indication to move the electronic device in the first direction.

The application discloses a kind of fusion BIM digital twin's net rack hoisting blind area dynamic calculation method and device.The method obtains the coordinates of the end point of the rod in the net rack digital model, the attribute of the rod, the coordinates of the ball node ball center, the attribute of the node and the layout information of the candidate tower crane, determines the hoisting coverage area of each tower crane in horizontal plane and forms total coverage area of tower crane;According to the geometric overlapping relationship of the projection position of rod and ball node and total coverage area of tower crane, extract blind area component, wherein the part of rod projection line segment is located outside total coverage area of tower crane to determine uncovered length, and the ball center projection point is located outside total coverage area of tower crane to determine blind area ball node;Further based on uncovered length, component attribute and cost parameter, calculate component level blind area cost, generate spatial distribution characteristics according to the spatial coordinates of blind area component, and output the two as candidate tower crane layout evaluation parameter, to improve the matching degree of tower crane blind area evaluation and net rack site hoisting and transportation demand.

A method (40) for calibrating a vehicle camera (23) designed to take infrared images is proposed, wherein several irregularly distributed markings (32) are arranged on a vehicle roof (30) and wherein the markings (32) are visible by means of the vehicle camera (23), comprising the steps, Capturing a sequence of multiple infrared images of a vehicle interior using the vehicle camera (23), wherein the position of the vehicle camera (23) is changed for each of the multiple infrared images, extracting the markings (32) from each of the multiple infrared images, projecting projection lines from the vehicle camera (23) to the extracted markings (32) on the multiple infrared images, Determining the intersection points of the projection lines with the vehicle roof (30) to determine a position of the markings (32), Determining displacement vectors of the markers (32) across the multiple infrared images as a function of the determined position of the markers (32), Estimating a change in position, translation, rotation and / or scaling of the vehicle camera (23) depending on the determined displacement vectors of the markers (32), Calibrating the vehicle camera (23) by updating the position of the vehicle camera (23) depending on the estimated change in position, translation, rotation and / or scaling of the vehicle camera (23).

The application relates to a projection line control method for the installation angle of a sloping plate, which comprises the following steps: S01: compartment positioning is ended, and it is determined that the perpendicularity meets the standard requirements; S02: construction drawings are determined; S04: the sloping plate is hoisted and hoisted to the reference sloping plate positioning line on the compartment; S05: the sloping plate is welded on the compartment, it is determined that the projection line in the sloping plate installation process is opposite to the reference projection line made in S03, it is determined that the projection point in the sloping plate installation process is opposite to the reference projection point made in S03, and the welding is ended. The application has the effects of controlling the positioning angle in the sloping plate manufacturing process and the electric welding operation process, and improving the installation precision of the sloping plate.

This application discloses a method and system for segmenting multilayer coupled transmission lines. The method includes: acquiring geometric data of each layer of transmission lines to construct a planar geometric object, and establishing an index structure for spatial query by layer; obtaining a set of candidate transmission lines located within the spatial query range corresponding to the target transmission line through the index structure; judging the geometric relationship of the candidate transmission line set and selecting a set of coupled transmission lines that meet the preset coupling conditions with the target transmission line; randomly selecting one transmission line from the set of coupled transmission lines as the reference transmission line, and projecting the remaining transmission lines in the set of coupled transmission lines along the direction of the reference transmission line to obtain a set of projection line segments with the same direction; finding at least one interval with an overlapping projection relationship in the set of projection line segments to form a co-projection interval group; and mapping the co-projection interval group back to the corresponding target transmission line to perform coupled segmentation processing on the transmission line.

At least one embodiment relates to signaling at least one texture patch representing a texture value of at least one in-between 3D sample, a texture patch being a set of 2D samples representing texture values of orthogonally projected 3D samples of a point cloud along projection lines onto a projection plane, and said at least one in-between 3D sample being a 3D sample of the point cloud having a depth value greater than a nearer 3D sample of the point cloud and lower than a farther 3D sample of the point cloud, said at least one in-between 3D sample and said nearer and farther 3D samples being projected along the same projection line.

This utility model discloses a bridge-breaking device, installed inside the discharge port of a wet sludge silo, including a bridge-breaking shaft, a first bridge-breaking section, and a second bridge-breaking section. The first bridge-breaking section is connected to the bridge-breaking shaft and has a first bridge-breaking scraper located outside the bridge-breaking shaft and arranged parallel to it. The second bridge-breaking section is also connected to the bridge-breaking shaft and has a second bridge-breaking scraper located outside the bridge-breaking shaft and arranged parallel to it. The projection lines of the second and first bridge-breaking scrapers on the bridge-breaking shaft are connected and distributed from one end of the shaft to the other. Compared with the prior art, during the rotation of the bridge-breaking shaft, the first and second bridge-breaking sections are driven to rotate. The arrangement of the first and second bridge-breaking scrapers allows for a sufficiently long contact position with the inner wall of the discharge port of the wet sludge silo, and also generates a squeezing force on the sludge towards the discharge port, resulting in a better bridge-breaking effect.

This invention relates to a multi-view display system, visualization system, and method for virtual pipelines. The visualization system includes an acquisition module, a creation module, and a generation module. The acquisition module acquires topographic image data and / or remote sensing image data of the area to be observed. The creation module generates a 3D GIS environment of the area to be observed based on the topographic image data and / or remote sensing image data. The generation module generates a pipeline model in the 3D GIS environment in response to the input of pipeline data. When generating a virtual pipeline, the long-distance pipeline data in the GIS environment includes projection line data. The projection line data converts the 3D topographic data of the Earth's surface into a 2D projection on a plane, clearly showing the pipeline's path and location on the map, thus displaying the pipeline data in a more intuitive way. Through the projection line data, users can clearly see the pipeline's path and location on the map, and by combining it with other geographic information, they can better understand the relationship between the pipeline and its surrounding environment.

The application discloses a method and system for segmenting multi-layer coupled transmission lines, wherein the method comprises: obtaining geometric data of each layer of transmission lines to construct a planar geometric object, and establishing an index structure for spatial query according to layers; obtaining a candidate transmission line set located in a spatial query range corresponding to a target transmission line through the index structure; and performing geometric relation judgment on the candidate transmission line set to screen out a coupled transmission line set satisfying a preset coupling condition from the target transmission line; selecting a transmission line in the coupled transmission line set as a reference transmission line, projecting the remaining transmission lines in the coupled transmission line set along the direction of the reference transmission line to obtain a group of projection line segments with consistent directions; finding at least one interval with an overlapping projection relation in the group of projection line segments to form a co-projection interval group; and reversely mapping the co-projection interval group to the corresponding target transmission line to perform coupling section segmentation processing on the transmission lines.

The disclosure provides a projection method, device and equipment of a three-dimensional mesh model and a storage medium. The method comprises: constructing edge topology information and a tree object of the three-dimensional mesh model; wherein the three-dimensional mesh model comprises a plurality of face patches, each face patch comprises a plurality of edges and a plurality of vertices; the edge topology information is generated according to the edges and vertices of the plurality of face patches; the tree object is obtained by dividing a bounding box of the three-dimensional mesh model; determining a candidate edge in the edge topology information according to a projection direction and a projection reference plane; wherein the candidate edge is an edge that needs to be subjected to visibility screening; determining a visible edge according to the projection direction, the candidate edge and the tree object; the visible edge is the candidate edge that can be projected onto the projection reference plane; projecting the visible edge according to the projection direction and the projection reference plane to obtain a two-dimensional projection line graph of the three-dimensional mesh model on the projection reference plane.