37results about How to "Guaranteed splicing accuracy" patented technology

The invention discloses a box-type steel column splice joint and further discloses a mounting method of the box-type steel column splice joint. The box-type steel column splice joint comprises an upper column unit and a lower column unit. A connecting unit used for connecting the upper column unit with the lower column unit is arranged between the upper column unit and the lower column unit, one end of the connecting unit is fixedly connected to the inner wall of the end of the lower column unit, and the other end of the connecting unit is higher than the lower column unit and is fixedly connected to the inner wall of the end of the upper column unit after butt joint and insertion of the upper column unit. The mounting method comprises the steps of prefabricating of the steel column units,hoisting of all the units, butt joint and temporary fixing, welding and the like. The box-type steel column splice joint and the mounting method thereof are suitable for super high-rise steel structure buildings and steel columns made of special steel, bearing special loads and high in safety level, and have the advantages that safety, economy and convenience are achieved, the splicing precisionis high, the strength is good, and the quality is excellent.

The invention discloses a multi-camera networking positioning calibration method for an aircraft digital assembly. A global control point in a measurement field is measured through laser tracking, anda global measurement coordinate system is constructed through an adjustment model, so that the overall error of aircraft profile measurement can be effectively controlled. An auxiliary reference point is measured through a photogrammetric network of multi-camera networking, and high-precision local measurement data is efficiently obtained. Through an RANSAC algorithm, a global control point and an auxiliary reference point are aligned and fused, the problem of global splicing error accumulation of local measurement data is solved, and the high-precision global measurement coordinate system (measurement field) is constructed. According to the invention, through combination of laser tracking and multi-camera networking, dependence on the number of laser tracker equipment can be effectivelyreduced, the construction cost of the measurement field is reduced, the automatic construction capability of the measurement field can be improved through photogrammetry, and the measurement efficiency is improved.

The invention belongs to the technical field of a display screen, and particularly relates to a splicing device for splicing adjacent display screen box bodies together. The splicing device comprisesa connection plate, operation rods and a plurality of buckling mechanisms for being buckled with the display screen box bodies; each buckling mechanism is mounted on the lateral surface of the connection plate, which is back to the display screen box bodies; first ends of the operation rods are mounted on the buckling mechanisms for controlling the buckling mechanisms to move; locking mechanisms for locking the buckling mechanisms buckled on the display screen box bodies with the display screen box bodies are arranged at second ends of the operation rods. The splicing device disclosed by the invention is simple in structure and simple to operate; the splicing device can be conveniently disassembled from the display screen box body, meanwhile, the connection plate can be firmly and fixedlymounted on the display screen box bodies, so that the adjacent display screen box bodies are more simply and reliably spliced together.

The invention provides a non-linear image splicing sequence obtaining method and device based on an unmanned aerial vehicle, and the method comprises the steps: storing a large number of disordered aerial images in each divided region according to coordinate information; calculating the similarity between the to-be-spliced image and other to-be-spliced images in the target area of the to-be-spliced image, and the position information of each deviation direction of each to-be-spliced image, so as to screen out spliced images in eight directions; and continuously carrying out iterative calculation in the target area of the obtained spliced image until all the images are calculated, and obtaining the splicing sequence of the images. Compared with an ordered splicing method in the prior art, the method has the advantages that the spliced images are calculated in the corresponding range through the scheme, the nonlinear image splicing sequence is generated through iterative calculation, the splicing accuracy between the images is guaranteed, and the image splicing efficiency is greatly improved.

The invention provides a part surface pattern detection method based on binocular vision and reverse model reconstruction. The method comprises the following steps: acquiring a large curved surface part processing file; based on the part surface pattern, performing high-precision contour three-dimensional reconstruction under a multi-boundary condition to obtain contour point cloud data of a plurality of different measurement viewpoints, and splicing the contour point cloud data of the plurality of different measurement viewpoints to obtain a target pattern three-dimensional point cloud; geodesic distances from all machining points on the standard digital-analog contour to the four positioning holes are calculated; fitting a curved surface of the to-be-measured large curved surface part in actual measurement based on the structured light, and reversely generating an actual measurement CAD contour; and carrying out modulus comparison on the three-dimensional point cloud of the target pattern and the actually measured CAD contour, and calculating a contour detection error. The method does not need to be fixed through a clamp in the measuring process, data comparison can still be conducted after the part deforms, and automatic and high-precision measurement of the surface machining pattern of the large curved surface part is achieved.

The invention belongs to the field of the space technology, and specifically relates to a space splicing, positioning, locking and adjusting integrated mechanism and a space splicing reflector. The mechanism comprises a capturing unit, a positioning unit, a locking unit and an adjusting unit. The capturing unit comprises a capturing hole and an insertion probe. The positioning unit comprises a positioning limiting hole with the central axis being parallel to the central axis of the insertion probe, wherein one end of the positioning limiting hole is connected with the capturing hole, and the other end of the positioning limiting hole is connected with the locking unit. The adjusting unit is connected with the locking unit. The mechanism solves technical problems that a conventional splicing and locking mechanism is complex in structure and is low in positioning precision, is additionally provided with the adjusting unit and is enabled to be adjustable.

The invention relates to a touch screen laser spliced pattern structure and an etching wiring method thereof in the technical field of a touch screen. A first etching wire is connected with an adjacent second etching wire at a spliced position by a first right angle bent structure; extension lines of the first etching wire and the second etching wire intersect with each other; and an intersectionangle is alpha. According to the invention, the right angle transition splicing structure is added at the oblique line splicing position, so that splicing accuracy of oblique line segments can be ensured, and a short circuit caused by splicing deviation is avoided.

The invention discloses a general-purpose multifunctional adjustable space-borne antenna test platform, which relates to the technical field of antenna test devices, and specifically includes a chassis frame, a rotating platform, a support frame and a working platform, and the upper surfaces of the chassis frames are respectively provided with bearings Seat, universal ball and auxiliary support feet, the surface of the bearing seat is provided with a slewing support, and the top of the slewing support is fixedly connected with the bottom of the rotating platform. Through the installation of universal wheels, worm gear lifts and adjustment devices, it is compatible with various caliber antenna array darkroom tests, effectively reducing design and production costs. It can fine-tune the pitch and azimuth angle of the antenna array, greatly improving The effect of the leveling efficiency of the darkroom antenna is solved, and the parameters such as the flatness of the antenna and the parallelism between the antenna array and the scanning frame in the darkroom have a great influence on the direction of the antenna array. The test platform needs to have the guarantee of the flatness of the array. And azimuth, pitch angle adjustment function.

A laser splicing pattern structure and its etching wiring method in the field of touch screen technology, a first etching line and an adjacent second etching line are connected through a first right-angle bending structure at the splicing place; the first etching line and the second etching line The extension lines of the two etching lines coincide. The present invention adopts right-angled horizontal etching lines and vertical etching lines to be connected to the joints of oblique line segments, which can ensure the splicing accuracy of oblique line segments and avoid short circuit caused by splicing deviations.

The invention provides a display substrate and a manufacturing method thereof. The manufacturing method comprises the steps that a substrate and a metal wire gating polarizer WGP imprinting template are provided, alignment marks positioned in a non-pixel region are positioned on the substrate, a metal film layer is formed on the substrate, a plurality of grating regions are formed on the metal film layer through recognizing the alignment marks and utilizing the WGP imprinting template, one of the grating region is formed through one-time imprinting of the WGP imprinting template, and a splicing position of the adjacent grating regions is positioned in the non-pixel region. The manufacturing method provided by the invention can be used for forming the grating regions on the metal film layer of the substrate through recognizing the alignment marks in the non-pixel region, so that the splicing position of the adjacent grating regions is positioned in the non-pixel region, thereby ensuring splicing precision, and preventing defects occurred in spliced gratings from affecting the subsequent display content.

The invention discloses a video image splicing method and device. Video image mosaic method of the present invention comprises the following steps: obtain video image; Adopt FFT-Mellin transform to judge the overlapping degree of video image adjacent frame, and select key frame according to overlapping degree; Carry out image registration to adjacent key frame; Will carry out Keyframe stitching for image registration into panoramas. The invention also discloses a video image splicing device.

The invention discloses a waterproof wear-resistant building brick. The waterproof wear-resistant building brick comprises a first protective layer, a butt joint layer, a preset layer, a bonding layerand preset steel bar pieces, wherein a connecting cavity is formed in the inner surface of the first protective layer, the inner side of the connecting cavity is connected with the butt joint layer in a bonding mode, the butt joint layer is connected with the inner surface of the first protective layer, the inner surface of the butt joint layer is connected with the preset layer in a bonding mode, the preset layer is connected with the first protective layer, a containing groove is formed in the inner surface of the butt joint layer, the outer surface of the butt joint layer is connected witha second protective layer in a bonding mode, and the second protective layer is connected with the outer side of the preset layer. According to the waterproof wear-resistant building brick, in the splicing process of a plurality of groups of building bricks, the building bricks are stably nested and vertically spliced through the vertically butted preset steel bar pieces, the splicing precision between the building bricks is further enhanced through the cooperation of the preset steel bar pieces and positioning pieces which are nested and butted, and the supporting strength and stability of the building bricks are improved while the splicing precision of the plurality of groups of building bricks is guaranteed through the preset steel bar pieces.

The invention discloses a method for measuring quasi-static stress deformation in a large-view-field plane. The method comprises the following steps that: (1) randomly scattered black and white spot features are prepared for a measured surface; (2) a main camera is fixed to shoot a picture of the center of a measurement area to serve as a center view, and the proportional relation between image pixels and the actual view field size is determined; (3) before loading, an auxiliary camera shoots a picture around the center view as a supplementary view, and the pictures are spliced to form a panoramic reference image; (4) after loading, the main camera takes a picture as a deformed center view, the auxiliary camera takes a picture around the center view as a deformed supplementary view, and the pictures are spliced to form a panoramic deformed image; and (5) a deformation field and a strain field are calculated for the two panoramic images by using a digital image correlation method. According to the measurement method, camera calibration is not needed, measurement of large-view-field plane deformation is simple and convenient, and full-field measurement of a large-size plane is achieved.

The invention discloses an LED display screen box. The sides of the LED display screen box are provided with at least one protruded part and at least one connecting part respectively, the protruded part comprises a first protruded part and a second protruded part which are sequentially connected, the distance between the protruded surface of the first protruded part and the box is larger than the distance between the protruded surface of the second protruded part and the box, the connecting part comprises a first connecting surface and a second connecting surface which are connected sequentially, and the distance between the first connecting surface and the box is larger than the distance between the second connecting surface and the box. The protruded part and the connecting part are arranged into a step shape, so that the connecting position of the display screen box can be in staggered stereoscopic layout, the display screen splicing flatness is controlled, and splicing precision is guaranteed.

A touch screen laser splicing pattern structure and its etching wiring method in the field of touch screen technology, a first etching line and an adjacent second etching line are connected through a first right-angle bending structure at the splicing place; the first etching line and the The extension lines of the second etching lines intersect at an angle of α. The present invention adds a right-angle transitional splicing structure at the splicing part of the diagonal line, which can ensure the splicing accuracy of the diagonal line segment and avoid short circuit caused by splicing deviation.

The invention provides a device and method for measuring the full-aperture intermediate-frequency profile of an ultra-high-precision plane mirror. The measuring device is used to measure the full-aperture intermediate-frequency profile of an ultra-high-precision plane mirror. The device includes: a white light interferometer, a microscopic objective lens, an axial displacement stage, Tilt adjustment table, lifting device, two standard mirrors and autocollimator, computer system and marble base. The white light interferometer is installed on the lifting device on the marble beam; the measuring platform composed of the axial displacement table and the tilt adjustment table is installed on the marble base, and the measurement process is monitored in real time by two vertically installed autocollimator angle measurement systems The space attitude of the ultra-high-precision plane mirror to be measured; the computer system is connected with the white light interferometer to collect the surface shape information of the ultra-high-precision plane mirror aperture area; the inner surface shape information of the next sub-aperture of the ultra-high-precision plane mirror is obtained by adjusting the translation stage, and finally according to the self- The collimator detection data is combined with the splicing data processing software to obtain the full-aperture surface shape error of the ultra-high-precision plane mirror.

The invention relates to a coiled material supply device for flexible circuit board production. The coiled material supply device comprises a support plate, a coiled material support mechanism, a first guide roller, a coiled material splicing mechanism, a group of flat steel plates, a coiled material thickness detection mechanism, a second guide roller and a tension control mechanism, wherein the coiled material support mechanism comprises an air expansion shaft which is rotationally mounted on the support plate; the first guide roller is positioned above the front side of the air expansion shaft; the coiled material splicing mechanism is arranged at the rear side of the first guide roller; the group of flat steel plates are detachably connected to two sides of the upper surface of a fixing part of the coiled material splicing mechanism through bolts; the coiled material thickness detection mechanism is arranged below the rear side of the fixing part and is used for detecting the residual thickness of the coiled material; the second guide roller is located at the rear side of the fixing part, and a third guide roller set which is arranged up and down is rotationally mounted at the upper part of the second guide roller; and the tension control mechanism is arranged at the upper side of the fixing part of the coiled material splicing mechanism. The coiled material supply device is compact in structure and small in occupied space; the splicing precision can be effectively improved, so that rapid and accurate splicing of new / old coiled materials is realized; and the offset when the new coiled material is output can be effectively reduced.

The invention discloses a high-precision true color three-dimensional reconstruction method, which comprises the following steps of: firstly, carrying out image acquisition: installing a left high-resolution gray scale camera and a right high-resolution gray scale camera in a horizontal relationship, keeping a certain distance, installing an optical machine between the two gray scale cameras, installing a low-resolution color camera above the optical machine, shooting a measured high-precision part, and finishing image acquisition; all shot images are transmitted to a computer, information of the surface of the measured high-precision part is recorded in a point cloud in a high-precision true color three-dimensional reconstruction mode, color texture information of the surface of the measured high-precision part is reflected, and non-contact high-precision true color three-dimensional reconstruction of the key part is achieved. According to the invention, a binocular color camera is replaced by the binocular high-precision gray scale camera, so that the range of wavelength capture is widened to a great extent, richer texture detail information of the measured high-precision part is reserved, and the measurement precision is improved to a great extent.

A three-dimensional configuration splicing method for large components based on laser vision sensing, which involves the fields of image measurement and data processing. For the problem of online measurement, the invention adopts the self-designed straightness splicing algorithm, which breaks through the length limit of a single measurement and is used for subsequent three-dimensional modeling. The laser vision measurement method of the present invention is derived from the idea of ​​the pitch method, and uses the advantages of the accuracy, stability, and real-time performance of the short-distance measurement of the laser vision sensor to measure the straightness of large and complex profiles. Due to the large size of the large and complex profile, the profile can be divided into multiple overlapping sections with the same length as the laser stripes, and the segmented measurement is carried out in each segmented area, and then the data processing is carried out to splice and reassess the straightness curve. structure, calculate the straightness of large and complex surfaces by splicing and reconstructing straightness curves. The invention is applied to the field of image measurement.

The invention discloses a piece-connecting-type printed circuit board and a cutting transplanting technology method. The piece-connecting-type printed circuit board comprises a base plate and at least one single-piece plate. The base plate is provided with a mounting hole. The mounting hole and the single-piece plate are matched in shape. A plurality of limiting parts which are turnup outwards are evenly arranged on the edge of the mounting hole. Protruding parts with the same number as the limiting parts are evenly arranged on the edge of the single-piece plate. The limiting parts and the protruding parts are matched. The limiting parts on the base plate are used for clamping the protruding parts on the single-piece plate in a buckling mode. According to the piece-connecting-type printed circuit board and the cutting transplanting technology method, the fact that the connecting gap between the base plate and the single-piece plate is small enough is guaranteed, and connecting accuracy is improved.

The invention discloses an improved feature extraction method and an image splicing method based on the same, and belongs to the technical field of digital image processing. According to the invention, the splicing speed of aerial images is improved under the condition that the splicing precision is not reduced. According to the feature extraction method, feature extraction is performed on to-be-spliced images I and I by using an FAST-9 algorithm, feature points are obtained by using Harris corner detection, a feature string is obtained through an improved BRISK algorithm, and the feature extraction is realized. Based on an ORB image splicing algorithm, the image splicing method combines characteristics of aerial images returned by an unmanned aerial vehicle to provide an improved ORB-based rapid image splicing algorithm, and realizes the technical effect of rapidly and efficiently obtaining a panorama. Through verification by simulation experiments, the invention can effectively improve the splicing speed of various splicing algorithms under the condition that the precision is not lost; the invention can be widely applied to splicing processing of aerial images; and the invention can quickly and accurately obtain global images of aerial photographing areas.

The splicing structure comprises a first wedge key assembly and a second wedge key assembly, wherein the first wedge key assembly and the second wedge key assembly are symmetrically installed in a key groove formed between two adjacent single box type cross beams, located on the left side and the right side of the key groove and used for adjusting the relative height between the two adjacent single box type cross beams; the bolt assemblies are installed between the two adjacent sections of single box type cross beams at intervals and used for fixedly connecting the two adjacent sections of single box type cross beams. The splicing precision can be guaranteed, the stability of the overall structure is improved, and the machining difficulty and the machining cost are reduced.