22 results about "Spherical space" patented technology

The invention discloses a real-time virtual environment view layout algorithm based on spherical space guidance. The algorithm comprises the following steps that an original view is acquired and preprocessed; abstracting into a circular structure and completely mapping to a constructed spherical view projection structure; weight analysis is carried out, a preset threshold value is compared, a high-weight standard view set and a low-weight standard view set are divided, and dynamic batch layout optimization processing is carried out on the high-weight standard view set; constructing a space pressure function field for the low-weight standard view set, and determining a target position by using a space pressure field guiding method; smooth movement from the current position to the target position is achieved through a Bezier curve interpolation method; and when the viewpoint or view angle change exceeds the threshold value, re-calculating the layout until the change amplitude is smaller than the threshold value, and generating a final layout. According to the method, the spherical space projection and the adaptive mechanical model are combined, the large-scale view layout is optimized, the method has the advantages of being efficient, stable and real-time, and the data visualization effect in the virtual environment is improved.

The invention discloses a three-dimensional sliding verification method and device with an anti-cracking function, and relates to the technical field of equipment verification, and the method comprises the following steps: randomly selecting a chartlet, a geometric figure and a chartlet coordinate; cutting the chartlet to obtain puzzle blocks and a cut chartlet; the map coordinates are converted into corresponding spherical coordinates, and the clipped map is rendered to a sphere space; projecting the sphere space rendered with the clipped chartlet to a touch screen of a client, and projecting the jigsaw blocks to the center of the touch screen of the client; adjusting the posture of the spherical space until the jigsaw blocks and the clipped chartlet form a corresponding chartlet; the to-be-spliced blocks and the clipped chartlet form a corresponding chartlet, and it is judged that identity verification is passed. According to the method, the chartlet is cut, and then the chartlet is spliced by means of the three-dimensional sphere, so that the use of a traditional verification code is canceled, the verification code is prevented from being cracked by a robot, and certain convenience and reliability are achieved.

The invention belongs to the technical field of three-dimensional reconstruction and robots, and particularly relates to an active viewpoint planning method based on uncertainty driving and information enhancement, which comprises the following steps of: firstly, calculating uncertainty based on a volume occupancy field of a current scene through a spherical uncertainty sampling (SUS) module; mapping to a spherical space to guide the sampling of high-quality candidate viewpoints; then, through a multi-expert information gain network (MEIGN) module, carrying out multi-modal feature coding and fusion on the agent point set sampled in the scene, and accurately estimating the visibility gain of each candidate viewpoint; and finally, selecting the viewpoint with the maximum information gain as the next optimal viewpoint. According to the invention, through effective combination of the sampling strategy and the gain estimation network, the efficiency and accuracy of three-dimensional reconstruction are significantly improved.

The invention provides a mirror reflection effect rendering method and device, electronic equipment and a storage medium, and the method comprises the steps: determining a visual angle vector corresponding to a to-be-rendered pixel point in a mirror model under a world coordinate system; determining a sphere space corresponding to the mirror surface model; determining reflection vectors corresponding to the pixel points based on the sphere space and the view angle vectors corresponding to the pixel points; wherein the reflection vector points to the target intersection point from the sphere center position of the sphere space; the length of the reflection vector is the radius of the sphere space; the target intersection point is the intersection point farthest from the virtual camera in the intersection points of the straight line where the visual angle vector is located and the sphere space; and on the basis of the reflection vectors corresponding to the pixel points, determining sampling coordinates of the pixel points in an environment map of the current scene, and sampling the environment map on the basis of the sampling coordinates to obtain a specular reflection effect. In the mode, the reflection vector has direction and fixed length information at the same time, it is ensured that the mirror reflection effect conforms to the physical law, and the visual immersion of the game is enhanced.

This invention relates to the field of shower head life testing, and more particularly to a device for testing the lifespan of shower head switching and ball head oscillation. The device includes a test frame and a movable component fitted onto the outside of an arc-shaped frame. The test frame includes an arc-shaped frame and positioning rods at both ends of the arc-shaped frame. The positioning rods are axially rotatably fixed to the shower head mounting rod. The movable component moves along the arc-shaped frame. A telescopic rod is connected to the side of the movable component near the positioning rods. A positioning frame is fixed to the end of the telescopic rod, and the interior of the positioning frame is filled with a positioning element made of elastic material. This invention, through the cooperation between the arc-shaped frame and the movable component, combined with the rotatability of the positioning rods, can control the free positioning of the movable component within a spherical space. Combined with the use of a universal ball head fixing method for the shower head, it ensures that the shower head is fixed by the positioning element and can be freely adjusted within the spherical space for testing. Only a random path needs to be set to simulate the uncertainty of human operation.

A time grating sensor for spherical multi-dimensional rotation angle measurement. The time grating sensor comprises a stator base body (1) and a rotor base body (2). The stator base body (1) is spherical shell-shaped, the rotor base body (2) is spherical and located in the spherical shell of the stator base body (1), and a gap is reserved between the surface of the rotor base body (2) and the inner surface of the stator base body (1), so that the rotor base body (2) is suspended and concentric with the stator base body (1). Six excitation units having the same shape and size are uniformly distributed at intervals on the inner surface of the stator base body (1). The centers of the six excitation units are located at the centers of six faces of a cube externally tangent to the inner surface of the stator base body (1). Eight sensing units having the same shape and size are uniformly distributed at intervals on the surface of the rotor base body (2). The eight sensing units are respectively symmetrically distributed on eight quadrants of a space rectangular coordinate system taking the center of the rotor base body (2) as the origin. Also disclosed is a mounting structure for the time grating sensor for spherical multi-dimensional rotation angle measurement. The solution above can realize high-accuracy multi-dimensional rotation angle measurement in a spherical space, simple structure, thorough decoupling, and strong anti-interference capability.

The embodiment of the application discloses a kind of grasping pose estimation method and related equipment, it is characterized in that, the method includes: based on the M sample points in the object point cloud of target object, determine the M sample point clouds of the object point cloud, each sample point cloud in the M sample point clouds is the point cloud of the object point cloud in corresponding target space, the corresponding target space is the spherical space with the M sample points in corresponding sample point as ball center and with preset length as radius;Wherein, the number of points included in each sample point cloud is greater than preset value;Based on the M sample point clouds and grasping end model parameter, M grasping poses are calculated, and the grasping end model parameter includes the width and depth of grasping end model;Select one grasping pose from the M grasping poses as the target grasping pose for grasping the target object.Using the embodiment of the application can improve the robot grasping efficiency, accuracy in complex scene.

The invention belongs to the field of aircraft structure design, and relates to a structural reliability reevaluation method and device based on spherical decomposition sampling. The method comprises the following steps: S1, determining an observation space and a failure space of an input sample; s2, extracting a sample pool according to the prior distribution of the input samples, and dividing the sample pool into spherical spaces which are not overlapped with each other; s3, calculating a first probability of the observation event alone, a first variable coefficient of the observation event alone, a second probability of the combination of the observation event and the failure event, and a second variable coefficient of the combination of the observation event and the failure event; s4, when the first variable coefficient or the second variable coefficient exceeds a set value, the number of layers of the spherical space with the maximum variance is determined, and the sample size is increased in the spherical space; and S5, calculating a posterior failure probability according to the first probability and the second probability. According to the method, the number of prior samples required for calculating the posterior failure probability is reduced, and the calculation efficiency of structural reliability reevaluation is improved.

This invention discloses a rapid positioning welding jig for spherical nodes in a space frame and its usage method, relating to the field of welded spherical space frame assembly construction technology. It includes a welding base, a member positioning device, an adjustable base for the support rod, a member support rod, and a top support. The welding base is used to place the welded sphere. The member positioning device is sleeved on the welded sphere to achieve precise layout of the contact position between the member and the welded sphere. The adjustable base for the support rod is arranged around the welding base, and the member support rod is installed on the adjustable base. The top support is hinged to the top of the member support rod to support one end of the member. The other end of the member is welded and fixed to the welded sphere. The rapid positioning welding jig for spherical nodes in a space frame provided by this invention and its usage method solve the problems of difficulty in ensuring positioning accuracy, cumbersome installation and dismantling of fixing devices, difficulty in moving them, high construction safety risks, and difficulty in controlling welding deformation in the prior art.

This product is an ice maker for producing spherical ice, and consists of an outer container with an open top and an inner container that has a flange and is separable into two parts, and when assembled, a spherical space for pouring ice-making liquid is formed inside, with the part excluding the flange being housed within the outer container.

The application discloses a kind of based on shape perception enhancement three-dimensional model retrieval method, including the following steps, real picture is acquired and is handled, obtains the multiscale feature of real picture, the data obtained is input dynamic sparse feature correction module and is handled, obtains fusion feature, is randomly initialized in spherical space feature aggregation module Generation spherical space feature;Fusion feature is input spherical space feature aggregation module and is handled, obtain spherical vector, establish the matching relationship of spherical space feature and spherical vector, adopt cosine measure to calculate similarity and sort, the first 10 spherical space features of option similarity highest, the class label of the three-dimensional retrieval model corresponding to the first 10 spherical space features of similarity highest is regarded as the final three-dimensional model retrieval result output.The application is more accurate by the feature extraction of three-dimensional retrieval model to target shape in real picture, significantly improve the robustness of three-dimensional retrieval model when facing diversified real scene.

The multi-focus ultrasonic transducer comprises a shell, a first ceramic chip and a second ceramic chip, a first limiting space and a second limiting space are arranged in the shell; the first ceramic chip is arranged on the first limiting space and is positioned on the surface of the first spherical space; the second ceramic plate is arranged on the second limiting space and is positioned on the surface of the second spherical space; the radius of the first spherical space is smaller than or larger than that of the second spherical space; in the ultrasonic focusing direction, ultrasonic waves generated by the first ceramic wafer pass through the first sphere center of the first spherical space, and ultrasonic waves generated by the second ceramic wafer pass through the second sphere center of the second spherical space. The first ceramic chip and the second ceramic chip generate first ultrasonic waves and second ultrasonic waves respectively, the first ultrasonic waves are focused at the first sphere center to form a first focus, the second ultrasonic waves are focused at the second sphere center to form a second focus, and the focal lengths of the first focus and the second focus are different, so that the effects of multiple focuses and variable focus distance are achieved.

The invention discloses a visual pre-calibration-based zoom monitoring method for the nearest distance between two targets in a spherical space, and belongs to the field of zoom visual measurement. The problem that when a plurality of fixed-focus cameras are adopted to monitor the closest distance between the two targets to determine the collision risk, the closest distance between the two targets cannot be calculated correctly due to the fact that the observation view angle is shielded is solved. The invention provides a layout scheme for acquiring monitoring images in a multi-view manner by using two sets of zoom cameras, in the layout scheme, the two sets of cameras are mounted on a high-latitude circle of a northern hemisphere of a spherical sky, the optical axes of the cameras point to the center of the sphere, and three monitoring ranges with different magnifications are adopted through zooming, so that zoom monitoring of the center of a target chamber is realized; and the problem that the closest distance between the two targets cannot be calculated correctly due to the fact that the observation visual angle is shielded when multiple fixed-focus cameras are used for monitoring the closest distance between the two targets is solved. The method is mainly applied to target chamber center collision risk monitoring.

The application discloses a kind of point cloud weak supervision semantic segmentation method, device and medium based on spherical projection, belong to intelligent identification technical field.The method includes: obtaining the point cloud data of laser radar;Mapping point cloud data into image space;The data after mapping is input into the semantic segmentation model after training and is handled, obtains dense and sparse prediction result, realizes the semantic segmentation of point cloud data.The application projects point cloud data into spherical space, and the features of spherical space are input into the deep neural network added with contrast learning module, to process target point cloud data to obtain prediction result, which can effectively reduce the dependence of the model on data labels, improve the accuracy of point cloud segmentation results under the condition of label scarcity.

This invention provides a method and system for joint calibration of LiDAR and camera using spherical space alignment, comprising: acquiring point cloud data from a vehicle-mounted LiDAR and image data from a camera; constructing spherical domains formed by multiple spherical spaces, and extracting key features from the LiDAR point cloud data and camera image data; constructing a perception spherical space from the multiple spherical domains, and accessing different modal features in the multiple spherical domains through linear calibration to determine cross-domain fusion information of the perception spherical space; performing feature enhancement on the cross-domain fusion information of the perception spherical space to obtain enhanced cross-domain perception features; and sequentially performing geometric alignment and semantic weight alignment on the enhanced cross-domain perception features to obtain fused feature information. This invention, by introducing the concept of a perception spherical space, utilizes deep learning alignment of geometric features from the radar and semantic features from the camera in multimodal features, effectively overcoming the difficulty in eliminating the misalignment between radar and camera information in physical methods, and significantly improving the alignment accuracy between different sensor modalities.

The utility model discloses a spherical net rack hyperbolic conversion layer suspended ceiling structure which comprises a steel net rack, a conversion layer keel layer and a steel structure conversion mechanism. The transfer layer keel layer comprises a plurality of horizontal keels and longitudinal keels which are horizontally arranged; the transverse keel and the longitudinal keel are connected through a clamping mechanism. The steel structure switching mechanism is welded with the welding ball to achieve the connection stability and safety of the suspended ceiling structure, the switching round pipe is connected with the welding ball, the remaining space is increased, the bearing tension is increased, the requirement for bearing capacity can be met, meanwhile, the situation that a bolt hole is reserved in the welding ball is avoided, and the service life of the suspended ceiling structure is prolonged. The integrity of the welding ball and the quality of the suspended ceiling are ensured; the longitudinal and transverse keels of the transfer layer are connected through the hoop mechanism, meanwhile, welding for fixing during construction of the transfer layer is avoided, the longitudinal and transverse keels are connected through the hoop mechanism, the construction procedure is simplified, the construction efficiency is improved, and therefore potential safety hazards are reduced.

This disclosure discloses a method, apparatus, device, storage medium, and program product for drawing spatial lines, relating to the field of computer technology, and particularly to the field of intelligent transportation. The specific implementation scheme is as follows: based on the three-dimensional coordinates of the endpoints of the line to be drawn and the mesh partitioning information of the spherical space, the mesh encoding information of the endpoints is determined; based on the mesh encoding information of the endpoints, a spatial line including the endpoints is drawn in the spherical space. The technical solution of this disclosure improves the efficiency and quality of spatial line drawing.

The invention discloses a heterogeneous collaborative recommendation method and system for multi-geometric interactive embedding and graph convolution comparative learning, and the method comprises the steps: constructing a knowledge graph triple and a user-article interactive graph from original data, extracting head entities from the knowledge graph triple and the user-article interactive graph, embedding the head entities, and mapping the head entities to a Euclidean space, a hyperbolic space and a spherical space; after mapping results of different spaces are unified through tangent space projection, fusion of the different spaces is achieved through cross attention; after fusion is completed, a graph attention network is used for executing attention aggregation of message propagation, geometrical relationship coding and structure perception on an interaction graph, and final representations of the user and the article are obtained respectively. And according to the final representations of the users and the articles, generating predicted scores of all the articles by the target user, and sorting the predicted scores to generate a recommendation list to finish article recommendation.

Disclosed in the present invention is a spherical ice maker, comprising a spherical mold, a refrigeration device, and a water supply apparatus, wherein the water supply apparatus supplies water to a spherical space in the middle of the spherical mold, and the refrigeration device freezes the water in the spherical mold into ice; the spherical mold comprises a first mold and a second mold, each having a hemispherical structure; the first mold and the second mold fit together to form a spherical space; the refrigeration device comprises a compressor, a condenser, a dry filter, a capillary tube and an evaporator that are connected in a loop by means of pipes; a heat exchange network of the evaporator is embedded in a spherical surface of the first mold, and two ends of the heat exchange network extend out of an outer spherical surface on the first mold to form an evaporator inlet and an evaporator outlet, which are respectively connected to the capillary tube and a compressor suction line. In the present invention, the evaporator of the refrigeration device is embedded into the spherical mold, reducing the number of heat transfer stages and increasing device compactness.

This invention relates to a temporary lifting device, system, and lifting method for a spherical node in a space frame, and pertains to the field of construction technology for the overall lifting of welded spherical space frames. It includes a welded sphere, steel sleeves, stiffening plates, and a base plate. Steel sleeves are connected to the top and bottom of the welded sphere, and the bottom steel sleeve is connected to the base plate. A stiffening plate is welded between the base plate and the welded sphere. This invention solves the problems of existing technologies, such as the inability to reuse temporary scaffolding, low utilization rate, long construction period, long rental period for large lifting equipment, high cost, and high safety risks associated with high-altitude operations.

This invention discloses a construction method for the internal support structure of a spherical building, comprising: constructing the main body of the spherical space frame and reserving hanging nodes; dividing the internal support structure along its height into a lower support area, a middle transition area, and a top operating area, and constructing it using a zoned reverse construction method; first installing the lower support area, then assembling the annular ring beam and platform plate of the top operating area into an operating platform unit, lifting the whole to the design elevation and fixing it with the hanging nodes to form a high-altitude work platform; subsequently using this platform to complete the installation of the middle transition area, making the various areas connected to form a whole. This method transforms the permanent top structure into a construction platform, completely replacing full-span scaffolding, significantly saving on scaffolding material rental, transportation, and labor costs, avoiding the impact of scaffolding loads on the floor slabs, and freeing up internal working space. It is particularly suitable for renovation or cross-construction projects where the main structure is already enclosed, the space is cramped, and there is no large hoisting channel.