102 results about "Hyperboloid" patented technology

The invention relates to the technical field of building simulation, and discloses a BIM-based special-shaped hyperboloid building site model generation method and system, and the method comprises the steps: collecting the multi-source heterogeneous point cloud data of a special-shaped hyperboloid building site to construct a three-dimensional feature tensor model, and recognizing the key curvature mutation point of the tensor model to construct a space reference topology network; based on the digital skeleton model, geometric contour features are analyzed, hyperboloid fitting is carried out, and an initial BIM model is obtained; performing multi-physics field coupling simulation on the initial model to obtain a target BIM model; extracting curvature distribution and structural stress parameters of the target BIM model to obtain basic model parameters, and constructing a building performance prediction model in combination with historical performance reference data; and inquiring a bearing capacity standard and a deformation threshold value, and analyzing the optimal curved surface parameter combination and a prestress applying strategy to obtain optimized simulation parameters, so as to simulate the special-shaped hyperboloid building by utilizing target model simulation. According to the method, the simulation precision of the special-shaped hyperboloid building can be improved.

The invention discloses an arc-shaped curved surface ribbed beam spherical roof construction optimization method based on spatial data, and relates to the technical field of building construction. According to the method, a multi-dimensional data acquisition and preprocessing system covering coordinates, loads and temperatures is constructed, a support, template and steel bar three-dimensional model is constructed based on a standardized data set, and dynamic regulation and control of template curved surface precision are realized in combination with curved surface modeling and a CPDI deviation index algorithm, so that the method is adaptive to the hyperboloid form of the cross arc ribbed beam, and the construction efficiency is improved. The load distribution uniformity of a supporting system is analyzed in real time, real-time linkage of data and a three-dimensional model is achieved by means of a digital twin platform, the construction parameter adjustment response time is effectively shortened, the formwork reworking and frame body reinforcing cost is reduced, and the node load standard deviation is greatly reduced through dynamic optimization of the vertical rod density and the inclined strut angle; in cooperation with temperature data closed-loop regulation and control, concrete inside and outside temperature difference over-limit cracking is avoided, early warning and management and control of risks in the whole construction process are achieved, and it is guaranteed that the geometric shape of the roof meets the design requirement.

The application discloses a knuckle, which comprises a ring topology structure, a disc body and a front axle, the ring topology structure and the front axle are connected to the two sides of the disc body respectively, two pin holes are arranged on the ring topology structure and are located on the same axis, and the curved surface surrounded by the outer end of the ring topology structure is a saddle-shaped hyperboloid, and the two pin holes are arranged at the convex position of the saddle-shaped hyperboloid. The application further discloses a design method of the knuckle. The knuckle obtained by the application has a reasonable structure, and can avoid the problems of crack expansion and overall failure of components caused by the fracture of the root of the vertical rib on the knuckle in the prior art.

The invention discloses a hyperboloid plate finished product acceptance inspection detection method and system, and belongs to the technical field of plate detection. Ideal required hyperboloid plates and actual hyperboloid plates are respectively divided into a plurality of ideal single curved plates and a plurality of actual single curved plates, and corresponding ideal single-plate three-dimensional point cloud models and actual single-plate three-dimensional point cloud models are obtained; after multiple matching point pairs are obtained and pose alignment is carried out, the qualification condition of the actual hyperboloid plate is analyzed according to the curvature deviation of each matching point pair, overall detection is converted into local single plate analysis, a detection blind area caused by hyperboloid geometric complexity is effectively solved, the pose deviation between the actual model and the ideal model is eliminated through pose alignment, and the detection accuracy is improved. Consistency of comparison references is ensured, and detection accuracy is improved.

The invention provides a hyperbolic variable cross-section construction process optimization method, and belongs to the technical field of building construction.The method includes the steps that precise geometric data of a hyperbolic variable cross-section structure is obtained to establish a geometric parameter matrix, and a high-precision finite element analysis model is established through a self-adaptive mesh refinement algorithm; establishing a double-layer game grid optimization model to realize coordination and balance of calculation precision and efficiency, establishing a prestressed tendon three-dimensional path planning model, optimizing a spatial arrangement path of the prestressed tendon in a hyperboloid by adopting a genetic algorithm, accurately calculating a curvature radius and a friction loss coefficient of the prestressed tendon, and adjusting arrangement parameters according to a prestress loss rate. And a real-time monitoring system is established to dynamically adjust construction parameters, and the technical problem of low prestress transmission efficiency caused by complex spatial path planning of the prestressed tendons in the construction process of the hyperbolic variable cross-section structure is solved.

The invention particularly discloses an approximate fitting and rapid assembling method for large-scale construction of double curved surfaces with stiffening ribs, and relates to the technical field of double curved surface thin plate structure assembling. The method comprises the following specific steps: when a hyperboloid is split, firstly, a model is gridded into triangular surface units, the triangular surface units are split into zigzag units with numbers and angle marks, stiffening rib plates with lug plates are arranged at bending positions and numbered, after the units are flattened, holes are dug at the connecting positions, and after typesetting and combination, accurate cutting is performed by a numerical control machine tool; during restoration fitting and assembling, the zigzag units and the stiffening rib plate lug plates are bent according to the marked angles, internal reinforcement of the units is completed through rivet connection, and then the stiffening rib plates are used for iteratively splicing the adjacent units so as to restore the whole hyperboloid. The method solves the problems of efficiency and cost of traditional double-curved-surface machining, has structural strength and economical efficiency, and is suitable for large-scale construction in the fields of building decoration and the like.

The invention discloses a partition fitting method for a free hyperboloid curtain wall skin, and aims to solve the problem that an optimal result of fitting sampling cannot be obtained by an existing hyperboloid curtain wall skin fitting method. The method comprises the following steps: setting arc edge sampling points on two arc edges II of an initial plate model, projecting a sampling line midpoint to the model to generate a sampling projection point, generating a first plane by the arc edge sampling points and the sampling projection point, projecting two arc edges I of the model to the first plane to generate an arc projection line and an arc edge projection line, obtaining a midpoint of a connecting line of corresponding nodes on the two projection lines and generating a middle curve, calculating a distance value from the nodes of the two projection lines to the middle curve, locking the positions of the arc edge sampling point and the middle curve when the distance value is minimum, forming a pressure arc line by the connecting line of two end points of the middle curve and the midpoint, and stretching to form a cylinder, and enabling the model to coincide with the normal of the side wall of the cylinder, projecting the arc edge of the model to the cylinder to form a single-curved-surface plate model, and outputting a pressure arc line, an angular point deviation value and an arc edge midpoint deviation value.

The utility model discloses a cambered surface forming machine of a hyperbolic aluminum veneer, which comprises a U-shaped seat, the inner side surface of the U-shaped seat is provided with a quick dismounting assembly, the quick dismounting assembly comprises a mounting plate, the two side surfaces of the mounting plate are fixedly provided with limiting blocks, the inner wall of the mounting plate is in threaded connection with a threaded frame, one end of the threaded frame is fixedly provided with a first round handle, and the other end of the threaded frame is fixedly provided with a second round handle. A mounting block is rotatably connected to the inner wall of one end of the threaded frame, a connecting column is slidably mounted on the inner wall of the mounting block, a disc is fixedly mounted at one end of the connecting column, a limiting column is fixedly mounted on the outer surface of one side of the disc, a limiting ring fixedly sleeves the outer wall of the connecting column, and a spring is fixedly mounted on the inner wall of one side of the limiting ring. The connecting columns are pulled to drive the springs to be compressed, so that the limiting columns are slidably mounted on the inner walls of the first compression roller and the second compression roller, the first compression roller and the second compression roller are quickly disassembled and assembled, mold rollers are conveniently replaced, and the flexibility and practicability of the device are greatly improved.

The invention relates to the field of image processing, in particular to a hyperbolic plate coating uniformity evaluation method and system based on machine vision. Comprising the steps of obtaining a hyperbolic plate image; acquiring a curvature region image set according to the hyperbolic plate image; determining a visual angle image set according to the curvature area image set, and obtaining a brightness image set according to the visual angle image set; calculating the image quality of each image in the brightness image set, and determining a target visual angle image in each brightness image set; extracting an image corresponding to each target view angle image from the view angle image set to obtain a uniformity analysis image, and obtaining a hue analysis image according to the uniformity analysis image; calculating a gradient difference threshold value of the hue analysis image, and converting the hue analysis image according to the gradient difference threshold value to obtain a converted image; and calculating the uniformity of the uniformity analysis image according to the converted image, and determining the uniformity quality of the hyperbolic plate. According to the invention, the accuracy of uniformity detection on the coating of the hyperbolic plate can be improved.

The present invention discloses an adjustment and installation system for a hyperbolic-shaped single-curved ceiling and its construction method, which includes a roof main steel structure, a conversion layer structure, and a hyperbolic-shaped ceiling. The conversion layer structure includes a vertically suspended steel frame, a main keel adjusted along the plate direction, a hanging secondary keel, a keel attitude adjustment component, and a ceiling hanging adjustment component. The two ends of adjacent keel segments and the bottom end of the suspender are adjustably connected through the keel attitude adjustment component. The ceiling hanging adjustment component is longitudinally arranged corresponding to the hanging secondary keel, and transversely arranged corresponding to the ceiling board segment. The top of the ceiling hanging adjustment component is buckled on the corresponding hanging secondary keel. The present invention adopts the method of equal plate but unequal seam. The width of the ceiling board is a fixed value, and the hyperboloid is adjusted by controlling the attitude of the ceiling board and the width of the board seam. There is no need to perform variable cross-section welding processing on the arc-shaped ceiling board, which ensures the problem of the overall hyperbolic curvature of the arc-shaped double-curved ceiling, enables batch production of the board, and guarantees the construction quality.

This invention provides a hyperboloid concealed door and its installation method, belonging to the field of concealed door technology. The hyperboloid concealed sliding door includes a wall and a concealed door. Its features include: the concealed door is fixedly installed on the right wall via a damping hinge; an expansion fixing assembly is installed inside the left wall, which is fixedly connected to an air pump via a branch pipe and a main air pipe; a laser sensor for sensing the concealed door's reset is installed at the bottom of the left wall; a distance sensor for detecting the concealed door's deformation is installed on the wall; a touch-sensitive switch for sensing personnel touching and controlling the opening and closing of the concealed door is installed on the left wall; and a main control box is installed inside the wall, containing a control chip. This invention solves the problem of easy deformation after prolonged use, which obstructs the opening and closing of the concealed door.

The utility model discloses a curved surface modeling warped unit curtain wall structure which comprises glass curtain wall units, stand columns, cross beams and connecting pieces, the stand columns and the cross beams are arc-shaped rods, the stand columns and the cross beams are arranged in a staggered mode and form unit frames, and the glass curtain wall units are arranged in the unit frames through the connecting pieces. The glass curtain wall units are fixedly arranged in the unit frames, and the adjacent glass curtain wall units are arranged in a staggered mode. The warping modeling of the glass curtain wall unit is realized through the connecting piece, the hyperboloid modeling of the building appearance is formed through the matching of the decorative plate, the building structure is not greatly changed, the increase of the construction cost is avoided, the curved surface and warping effects are realized by utilizing the plane glass, the construction cost is further reduced, and the construction efficiency is improved. And meanwhile, the device has the advantages of stable structure, graceful shape and convenience in maintenance.

The invention relates to the technical field of building curtain wall engineering, and discloses a wave double-curved-surface curtain wall mounting structure which comprises a mounting frame and a plurality of pieces of glass and further comprises a moving mechanism, and the moving mechanism is mounted on the side wall of the mounting frame and used for fixing the mounted glass. In the sliding process of the U-shaped plate, the side wall of the U-shaped plate pushes the arc-shaped block, the arc-shaped block swings around the side wall of the supporting strip, the distance between the arc-shaped block and the U-shaped plate is reduced, so that the arc-shaped block is bent to make contact with the side wall of the bottom glass, and then when the positioning strip is subjected to downward acting force of the top glass, the arc-shaped block swings around the side wall of the supporting strip. A buffer space is applied to the supporting strip to protect the bottom glass, the situation that the supporting strip is inclined and touches the bottom glass due to the fact that the downward pressure applied by the top glass is large when the glass is installed is reduced, the glass is kept complete, and the overall quality of the structure is improved when the structure is used for installing the wave-shaped curtain wall.

The present invention belongs to the field of building construction technology, and discloses a node structure and a method for constructing a hyperbolic large-span steel structure with a node structure. In the present invention, the node structure includes a first node component, and the first node component includes an L-shaped support plate and an edge sealing combination. The L-shaped support plate includes a first plate, a second plate and a rib plate that are vertically arranged in pairs. The first plate and the second plate form an L-shaped structure. The second plate and the rib plate are both vertically arranged on the steel beam. The first plate is against the steel truss plate. The edge sealing combination is connected to the steel beam and is arranged around the outside of the steel truss plate. In the present invention, the L-shaped support plate is used to ensure the safe and smooth installation of the steel truss plate, and the edge sealing combination is used to achieve its efficient and accurate installation. At the same time, the stepped paving and two-time concrete pouring method can not only ensure the production and installation accuracy of the hyperbolic floor decking, but also ensure the strength of the hyperbolic floor decking and the overall stability of the hyperbolic large-span steel structure.

The utility model relates to the field of glue brushing devices, in particular to a glue brushing device based on GRG hyperboloid gradient diffuser surface treatment. The utility model provides the glue brushing device based on GRG hyperboloid gradient diffuser surface treatment, which is convenient to flexibly combine and use. Comprising a liquid storage box, a brush and pressing pieces, the detachably combined brush is assembled on the lower portion of the liquid storage box through a mounting groove, clamping grooves used for mounting the pressing pieces are formed in the inner wall of the mounting groove at intervals, and the pressing pieces are used for axially clamping and limiting the assembled brush. By the adoption of the structure of the extensible spliced single brush assemblies and the T-shaped installation grooves, rapid combination and installation of the multiple single brushes are supported so that the brushes with different wide faces can be achieved through combination, liquid guide grooves between the brushes with the different wide faces can be sealed through the synergistic effect of spring clamping blocks of pressing pieces and sealing gaskets, and use is flexible and convenient; stepless adjustment of the brushing angle is achieved by pressing the button, so that an operator can complete continuous glue brushing operation of a complex curved surface in a single-hand holding state.

The application is a method for calibrating the center of a linear in unit sphere model projection hyperboloid camera, characterized by using only one image containing two straight line images, five internal parameters of the camera are recovered. First, the pixel coordinates of the edge points of the two straight line images and the mirror profile image are extracted from one image respectively, and the equations of the two straight line images and the mirror profile image are obtained by using the least square method. On the basis of obtaining the equations of the two straight line images and the mirror profile image, the common vanishing point of each straight line image and the mirror profile image is obtained by solving the generalized eigenvector, and the vanishing line of the mirror profile image corresponding to the support plane is recovered by connecting the two common vanishing points. According to the polar point-polar line relationship, the polar point of the mirror profile image corresponding to the vanishing line is recovered, that is, the principal point. Because the two straight line images and the mirror profile image correspond to three different support planes, the vanishing line of the support plane corresponding to the two straight line images can be recovered by using the principal point. The vanishing line is associated with the corresponding straight line image, and the constraints of three pairs of independent circular ring point images are recovered. The image of the absolute quadratic curve is Cholesky decomposed and inversely solved, and the camera internal parameter matrix is uniquely determined.

The utility model discloses a special-shaped hyperboloid single-layer reticulated shell steel structure which comprises two pieces of edge steel, a steel body assembly is arranged on the edge steel, the steel body assembly comprises fixing blocks, a first supporting rod, a second supporting rod, a stand column and a movable rod, the fixing blocks are evenly arranged on the two sides of the edge steel, and the first supporting rod is arranged on the first supporting rod. Every two fixing blocks form a group, the first supporting rods and the second supporting rods are connected to the fixing blocks respectively, the stand columns are evenly arranged on the second supporting rods, the moving rods are connected to the stand columns in a sliding mode, fixing assemblies are arranged on the stand columns, each fixing assembly comprises a fixing groove, a moving groove and a fixing rod, and the moving rods are arranged in the fixing grooves. The fixing grooves are formed in the moving rods, the number of the fixing grooves is two, and the moving grooves are formed in the stand columns, so that the technical problem that in the actual using process of the special-shaped double-curved-surface single-layer latticed shell steel structure mentioned in the background technology, due to the fact that the shape of the structure is irregular or local weak links possibly exist in the design is solved.

The utility model discloses a hyperbolic roll bending machine for aluminum veneer hyperbolic processing, which comprises a protective plate, the outside of the protective plate is fixedly connected with two guide frames, the inner walls of the two guide frames are slidably connected with pressing plates, the outside of each pressing plate is fixedly connected with a sliding block, the outside of each pressing plate is fixedly connected with a plurality of first springs, and each first spring is fixedly connected with a plurality of second springs. The outer portions of the sliding blocks are rotationally connected with brush wheels, the inner wall of the protection plate is movably connected with a connecting column, the outer portion of the connecting column is fixedly connected with a cleaning plate, the inner wall of the cleaning plate is fixedly connected with a plurality of second springs, and a plurality of leakage grooves are formed in the inner wall of the protection plate. And the inner wall of the guide frame is rotationally connected with a guide assembly for guiding subsequent parts. According to the aluminum veneer cleaning device, the aluminum veneer moves forwards under the action of the rollers to drive the brush wheels to rotate so as to clean impurities on the surface, meanwhile, the cleaning plate cleans the lower portion of the aluminum veneer, the impurities fall off from the leakage groove, and the product quality is effectively improved.

The invention relates to the technical field of cooling towers, and discloses a construction method of a hyperbolic steel structure cooling tower, which comprises the following steps: acquiring process parameters; an original point is selected on a tower bottom circle, a linear generatrix capable of generating a target hyperboloid in a rotating mode is accurately determined through a geometric construction method, construction logic is converted from curve arrangement on a curved surface to curved surface generation through a linear skeleton, fundamental simplification of a structural system is achieved, a spherical node structure does not need to be used, and the method is easy to implement and high in practicability. The steel consumption and the construction cost are remarkably reduced, meanwhile, rod piece machining and on-site installation are more convenient and faster, and the structural force transmission efficiency and the overall stability are improved.

This invention relates to the field of glass processing technology, and in particular to a production apparatus and process for 3D hyperboloid glass covers, which solves the problem of poor finished product quality of 3D hyperboloid glass covers formed by traditional molds. The apparatus includes a protective mechanism, which includes a pressure cylinder. A forming mechanism is installed inside the pressure cylinder. The forming mechanism includes a lower mold. A sealing frame is vertically slidably connected to the upper part of the lower mold. A rectangular frame is fixedly connected to the bottom wall of the pressure cylinder on the outer side of the lower mold. The glass cover to be formed is placed in the lower mold. When the glass cover to be formed is heated and high-pressure inert gas is introduced into the pressure cylinder, the gas pressure acts on the glass cover to be formed, causing the glass cover to deform and adhere to the lower mold. The process includes atmosphere replacement, heating, pressurization, annealing, and material removal. This invention uses gas pressure to drive the glass cover to adhere to the lower mold, avoiding poor quality in the later forming process.

The invention provides a double-curved-surface quadrupole rod device, a double-curved-surface quadrupole rod system and a manufacturing method of the double-curved-surface quadrupole rod device. The double-curved-surface quadrupole rod device comprises at least one pole rod and a fixing structure. The fixing structure comprises a fixing seat, a positioning ball, a spring and a fastening screw; one part of one side of the outer surface of the pole rod is a hyperboloid, one part of the other side of the outer surface of the pole rod is a round surface, a pair of parallel planes are arranged between the hyperboloid and the planes, and the four planes jointly form the outer surface of the pole rod; the fixing base is of a three-dimensional columnar structure, the center of the fixing base is hollow, the pole rod is arranged in the fixing base, and the round face of the outer surface of the pole rod is matched with the inner surface of the fixing base. Through the design of the hyperboloid pole rod, a more ideal hyperboloid electric field can be generated, the influence of a high-order field is reduced, the trajectory offset of charged particles is avoided, and the resolution and sensitivity of the mass spectrometer are improved.

The invention discloses an indoor hyperboloid wall decoration model and an installation method thereof.According to the indoor hyperboloid wall decoration model and the installation method thereof, the hyperboloid wall decoration model is divided into a plurality of modularized hyperboloid composite decoration plates, machining of the hyperboloid composite decoration plates is completed at a factory end, and only installation of the hyperboloid composite decoration plates is conducted on a construction site; the curved surface construction precision of the whole wall surface hyperboloid model can be effectively ensured; meanwhile, when the double-curved-surface composite decorative plate is manufactured, the double-curved-surface composite decorative plate is divided into a plurality of single-curved-surface composite plates according to curve line type changes of the double-curved-surface composite decorative plate, the double-curved-surface line type of the double-curved-surface composite decorative plate is effectively guaranteed in the mode that the single-curved-surface composite plates are manufactured and then assembled, and meanwhile the manufacturing difficulty of the double-curved-surface composite decorative plate is lowered.

The invention relates to impact-resistant eyeglasses with a hyperboloid lens and an impact-resistant lens. The pair of impact-resistant glasses with the double-curved-surface lenses comprises at least one wearing unit and a lens unit, the wearing unit comprises at least one wearing part which extends for a preset length along a first linear direction. The lens unit comprises at least one assembling part and at least one impact-resistant lens fixedly arranged on the assembling part, and the impact-resistant lens is symmetrically assembled with the wearing unit by means of the assembling part about a symmetric center line. Each impact-resistant lens comprises at least one curved surface area which respectively extends along a second linear direction and a third linear direction, and the curved surface areas are bent at different curvatures in the second linear direction and the third linear direction.

The application provides a flow control method based on a hyperboloid fish scale bionic structure, which comprises the following steps: S1, constructing a main structure of an impeller blade, including a suction surface e and a pressure surface f, and fish scale areas g with multiple fish scale bionic structure coupling elements arranged on the suction surface e and the pressure surface f; S2, constructing and designing a single fish scale bionic structure coupling element, including a bottom surface attached to the blade surface and a top surface in a fish scale structure, the top surface comprises a folded hexagonal surface with the end points of the fold lines coinciding with the bottom surface, and three grooves parallel to the edges, and a space rectangular coordinate system is established with the end points of the fold lines as the origin, and the fish scale bionic structure coupling element is constructed in the space rectangular coordinate system; and S3, establishing multiple fish scale bionic structure arrangement rules. The application can improve the fluid flow characteristics of the blade surface and reduce noise generation based on the control of flow by the bionic structure.

The utility model discloses a hyperboloid paired joint universal shock absorber, which belongs to the technical field of shock absorbers and comprises a first spherical section and a second spherical section, and a corrugated section is fixedly mounted between the first spherical section and the second spherical section. A first flange and a second flange are symmetrically and fixedly installed at the two ends of the first spherical section and the two ends of the second spherical section correspondingly, first semi-rings and second semi-rings are symmetrically installed on the sides, close to each other, of the first flange and the second flange, and springs are fixedly installed between the two first semi-rings and between the two second semi-rings correspondingly. According to the device, the damping effect is improved, the replacement process of the spring is simplified, the structural strength is enhanced, and mounting and positioning are facilitated. Due to the beneficial effects, the shock absorber has a wide application prospect in industries such as chemical engineering which need to cope with high frequency or compound vibration.

The invention relates to the field of ship conduit welding, in particular to a laser welding positioning method for a ship conduit hyperboloid, which comprises the following steps: determining whether to perform parameter optimization for a welding positioning process or not according to a reference curvature evaluation index of a target welding component; when parameter optimization is executed, whether a dynamic acquisition analysis mode or a reference execution analysis mode is adopted for positioning execution optimization is determined according to the regional curvature difference index and the regional reference curvature index; during dynamic acquisition and analysis, determining whether to adjust the positioning acquisition parameters or not according to the acquisition mapping difference index, and determining to perform distribution characteristic analysis or distribution interference analysis on the mapping difference point location according to the acquisition mapping difference index; and determining whether optimization processing is executed or not according to the mapping difference distribution parameters of the reference welding areas during reference execution analysis. According to the method, the analysis efficiency and effectiveness of the welding positioning result of the ship guide pipe with the complex geometric structure are improved.

The utility model discloses a hyperboloidal heavy current jack with a spring, which relates to the technical field of electric connectors, and comprises a jack main body, the upper side of the jack main body is provided with a sealing cover, the inner surface of the sealing cover is fixedly provided with an inner ring, the inner circular surface of the inner ring is provided with a circular groove, the left end of the jack main body is fixedly provided with a convex ring, and the convex ring is provided with a convex groove. An expansion rubber ring is fixedly installed on the outer circle face of the protruding ring, the inner diameter of the inner ring is matched with the diameter of the protruding ring, and the position, located on the surface of the protruding ring, of the expansion rubber ring is matched with the position, located on the inner side of the inner ring, of the annular groove. Compared with the conventional common hyperboloid spring-equipped high-current jack, the hyperboloid spring-equipped high-current jack has the advantages that the opening part of the jack main body can be fully and effectively sealed and protected when not in use, dust or water vapor is prevented from permeating through the opening to pollute the jack main body, the safety of the internal structure of the jack main body is ensured, the sealing cover can be automatically fixed, and the safety of the jack main body is ensured. And the sealing cover cannot be opened by rotating randomly, so that the stability of sealing protection is ensured.

The invention discloses a diamond piezoresistive effect pressure sensitive structure design method, which comprises the following steps of: forming a buried oxide layer through ion implantation by taking a single crystal diamond as a substrate, and processing a three-dimensional gradient cantilever beam array and a hyperboloid diaphragm initial contour on the diamond substrate by utilizing an oxygen plasma anisotropic etching technology; and then, carrying out crystal orientation selective etching by adopting Ar / Cl2 mixed gas to form a V-shaped stress concentration groove. And finally, through an atomic layer deposition technology, an Al2O3 / TiN composite transition layer is deposited on the surface of the double-curved-surface diaphragm, and gradient distribution of carrier mobility is regulated and controlled, so that synergistic enhancement of a piezoresistive effect and structural mechanics is realized. The structure is high in sensitivity, high in stability, excellent in corrosion resistance and abrasion resistance, good in heat dissipation performance and suitable for high-precision pressure measurement scenes.

The invention relates to the technical field of steel structure construction, in particular to a construction method of a multi-curvature hyperboloid steel structure aluminum plate curtain wall of an overpass, which comprises the following steps of: acquiring point cloud data of an annular overpass by adopting three-dimensional laser scanning equipment, and generating line data from the point cloud data to reconstruct an annular overpass model; selecting a plurality of feature points on the annular overbridge model as association points, and importing the steel structure data into the annular overbridge model; precise modeling of an annular overbridge main body is achieved through a three-dimensional laser scanning technology, and the suitability of a steel structure and the overbridge main body is ensured by combining data of the associated point butt joint steel structure; the installed keel is scanned and corrected subsequently, so that aluminum plate modeling is based on the actual keel form, and the modeling accuracy of the double-curved-surface curtain wall is greatly improved.

The present application relates to the technical field of myopia prevention and control lenses, and particularly relates to a double-curved surface defocus composite lens and a double-curved surface defocus composite glasses. The double-curved surface defocus composite lens comprises a central clear vision area, a discrete defocus area and an annular defocus area. The annular defocus area of the back curve generates a persistent optical defocus stimulation, the discrete defocus area of the front curve provides a high-intensity discrete stimulation, and the spatial superposition of the discrete defocus area of the front curve and the annular defocus area of the back curve forms a multi-dimensional stimulation, thereby breaking through the limitation of neural adaptability and maintaining a long-term prevention and control effect. The radial width of the annular defocus area of the back curve can accurately cover the peripheral sensitive visual field area of the retina, and in combination with the lenticule distribution of the discrete defocus area of the front curve, a persistent defocus intervention on the key area is formed. By synchronously correcting central vision and regulating the peripheral defocus state, the double effect inhibits the rapid growth of the eye axis and improves the efficiency of myopia prevention and control.