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

The invention belongs to the technical field of vehicle-borne radars, and particularly relates to a high-mobility large-scale radar vehicle. The radar vehicle comprises an assembling platform and an electronic equipment cabin, wherein leveling supporting legs are arranged on the lower plate surface of the assembling platform; a fixed antenna and a folded antenna are arranged at the electronic equipment cabin; the folded antenna is driven by a hydraulic driving assembly, so that two position conditions of withdrawing and unfolding are generated along a vertical surface; when the folded antenna is under a withdrawing condition, the antenna plate surface of the folded antenna is vertically arranged, when the folded antenna is under an unfolding condition, the antenna plate surface of the folded antenna is horizontally arranged, and the antenna plate surface of the folded antenna and the antenna plate surface of the fixed antenna are in the same plane; and the radar vehicle also comprises a servo control system and an electric generating system. According to the high-mobility large-scale radar vehicle disclosed by the invention, the situation that the width and the height are not exceeded during the transporting of radar antennas can be guaranteed, functions of quick erecting and quick removing of an antenna array surface can also be realized, and finally, the high mobility of the ground vehicle-borne radar is guaranteed.

A large wallboard class part digitized quality detection method includes the steps of firstly, conducting initialization operation before measurement, namely, fixing a wallboard class part to be measured, arranging the position of a laser tracker and the position of an articulated arm and conducting scanning region partition on the wallboard class part to be measured; secondly, arranging wallboard positioning points and point cloud registration points and recording the positions of the points through the laser tracker; thirdly, obtaining point cloud data and registration point coordinates in each region through the articulated arm; fourthly, obtaining a point cloud of a whole wallboard; fifthly, comparing the point cloud with a model and outputting the detection result. When detection is conducted on the large wallboard class part through the method, the accuracy is high, the operation is simple, and the use effect is good.

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 relates to a graph on-line splicing method and system for laser processing of a large format, and solves the problem that the splicing accuracy of an existing on-line splicing method cannot meet the processing requirement. The graph on-line splicing method comprises the following steps of 1) dividing a to-be-processed graph into N sub graphs, and acquiring the coordinate of the center point of each sub graph and the smallest rectangular region containing each sub graph; 2: turning on an indication power supply, enabling light beam emitted by the indication power supply to reach an X to-be-processed area, and scanning the boundary of the X to-be-processed area; 3) observing the X to-be-processed areas by a coaxial measuring unit, acquiring the images of the X to-be-processed areas, and obtaining the actual bounding box of the X to-be-processed areas by the control unit according to the acquired image; 4) comparing a theory bounding box with an actual bounding box; 5) adjusting the positions of X sub graphs in the control unit; and 6) completing the graph scanning of the X processing areas; and 7) repeating the step 2 to the step 6.

The invention belongs to the technical field of space and particularly relates to an androgynous cone rod type precise splicing mechanism for a space splicing reflection mirror. The precise splicing mechanism comprises a support main frame, wherein a mounting middle plate, a capturing device, a positioning device, a locking device, an adjusting device and a separating device on arranged on the support main frame, wherein the capturing device comprises a capturing hole and an insertion probe which are located on the same side of the mounting middle plate, and the axis of the capturing hole andthe axis of the insertion probe are arranged in parallel; and the positioning device, the locking device, the adjusting device and the separating device are arranged on the other side of the mountingmiddle plate. According to the androgynous cone rod type precise splicing mechanism, the technical problems that an existing splicing mechanism is complex in structure and poor in splicing precision are solved.

The invention discloses a three-dimensional configuration splicing method for a large component based on laser vision sensing, relates to the field of image measurement and data processing, and aims to solve the problems of large workload, low efficiency, poor anti-interference capability and difficulty in realizing on-line measurement of large complex profile straightness measurement. The three-dimensional configuration splicing method adopts an autonomously designed straightness splicing algorithm, breaks through the length limitation of single measurement, and is used for subsequent three-dimensional modeling and the like. The laser vision measurement method is derived from the idea of a pitch method, and the straightness of a large complex molded surface is measured by utilizing the advantages of accuracy, stability, real-time performance and the like of short-distance measurement of a laser vision sensor. The size of the molded surface of the large complex molded surface is large,so that the molded surface can be divided into a plurality of partially-overlapped sections with the length equal to that of laser stripes, segmented measurement is carried out in each segmented section, then data processing is carried out to carry out splicing reconstruction on a straightness curve, and the straightness of the large complex molded surface is calculated through the straightness curve obtained after splicing reconstruction. The method is applied to the field of image measurement.

The invention discloses a microscopic image splicing method and system, and belongs to the field of image processing, and the method comprises the steps: controlling an image collection unit to successively translate and collect microscopic images at all positions of a sample, and enabling the size of an overlapping region of adjacent images to be equal to a set value; searching source feature points in the source image overlapping area, determining corresponding target feature points in the microscopic image corresponding to the target image overlapping area, and the target image is the microscopic image after current splicing; searching all feature points in a window taking any target feature point as the center, calculating the distance between the corresponding source feature point and each feature point in the window, and judging whether the source feature point is matched with the feature point corresponding to the minimum distance according to the ratio of the minimum distance to the second minimum distance; splicing the source image and the target image according to a matching result, and taking the spliced image as the target image; and so on, until the last microscopic image is spliced to the target image. The calculated amount is small, the consumed time is short, and the splicing efficiency is greatly improved.

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 discloses a universal multifunctional adjustable satellite-borne antenna test platform, and relates to the technical field of antenna testing devices. The universal multifunctional adjustable satellite-borne antenna test platform specifically comprises a base disc frame, a rotating platform, a supporting frame and a working platform, wherein the upper surface of the base disc frame is provided with a bearing pedestal, universal balls and auxiliary supporting legs, the surface of the bearing pedestal is provided with a slewing bearing, and the top part of the slewing bearing is fixedly connected with the bottom part of the rotating platform. Through the arrangement of the universal wheels, a worm and gear lifter and an adjusting device, a darkroom test compatible with antennaarray planes with various apertures is achieved; the design and production cost is effectively reduced; the antenna array plane pitching and azimuth angle can be finely adjusted; the effect of darkroom antenna leveling efficiency is greatly improved, and the problems that parameters such as the antenna flatness and the parallelism between an antenna array plane and a darkroom scanning frame have large influences on the pointing direction of the antenna array plane and the test platform needs to have the functions of array plane flatness guarantee and azimuth and pitch angle adjustment are solved.

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 discloses a point cloud splicing method based on a precision control field and point cloud feature similarity. The method comprises: a reference measurement system constructing a control field and a global coordinate system, a sensor collecting mark points at an initial pose, and obtaining a source point set; the sensor collecting the mark points at the next pose to obtain a target point set; respectively solving an initial conversion relation RT0 between the source point set and the target point set; performing translation rotation on the target point set by utilizing the RT0, solving an overlapping region, and solving a conversion relation RT1 between the target point set and a global coordinate system based on point cloud similarity; searching candidate homonymy points by using the RT1 and each contrast point; continuously constructing a target function jointly constrained by the precision control field and the point cloud similarity, and iterating to obtain RT2; obtaining the conversion relation of all poses, and completing overall scanning. According to the scheme, the existing splicing process is optimized, and the requirement for the number of mark points is reduced; practicality, flexibility and efficiency of large complex object point cloud splicing are improved.

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.

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.

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 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.