18results about How to "Reduce alignment errors" patented technology

The invention belongs to the technical field of knowledge graph construction, and particularly relates to a multi-source heterogeneous data fusion and knowledge graph automatic construction system, which comprises a semantic extraction module for extracting minimum semantic fragments from multi-source data and performing cross-source alignment to generate a symbolized semantic framework; the data purification module converts multi-source data into symbolic predicates according to the framework, filters low-evidence data and outputs a purification set; the ternary generation module inputs the initial triad candidate set into a minimum rule grammar, and extracts entities, relationships and attributes to generate an initial triad candidate set; the disambiguation calibration module generates entity two-hop topological fingerprints based on the candidate set, completes disambiguation alignment and corrects conflicts, and outputs unambiguous structured knowledge; the mapping fusion module fuses the mapping information with the minimum connected ontology, and constructs and verifies an initial mapping knowledge domain; and the incremental updating module processes newly added data, performs incremental merging and maintains consistency, and forms a complete knowledge graph. According to the method, through full-link automatic construction, efficient fusion and high-quality atlas are realized.

The application discloses a butt joint device for pipeline welding and belongs to the technical field of pipeline welding, which comprises a holding mechanism and a butt joint mechanism. The holding mechanism comprises two holding arc plates which are hingedly connected, and arc-shaped insertion grooves are formed in the holding arc plates. The butt joint mechanism comprises two butt joint outer plates which are hingedly connected, and a butt joint inner plate which is movably inserted into the butt joint outer plates and is slidably matched with the arc-shaped insertion grooves. Welding ports are formed in the butt joint outer plates in a penetrating manner. In the scheme, the holding mechanism and the butt joint mechanism are connected, so that the pipelines on both sides can be centrally positioned, the operation of assisting in the central positioning of the pipelines by additional workers is avoided, the central positioning error can be greatly reduced, the conditions such as incomplete welding and large butt joint ports in the pipeline welding are prevented, and the welding quality is improved. One person can operate the butt joint device, the labor cost and a large amount of time are saved, the construction efficiency is remarkably improved, the construction period is reduced, and the butt joint device has great popularization and application values.

The invention discloses a face gear on-machine measurement comprehensive error compensation method based on sequential decoupling. Specifically, a sequential decoupling compensation strategy is provided for solving the problem that the measurement precision is limited due to mutual coupling of a measuring head pre-stroke error and a workpiece installation coordinate system error in the prior art. The method comprises the following steps: firstly, establishing a measuring head pre-stroke error model through standard ball calibration, and performing anisotropic compensation on a tooth surface measuring point by utilizing Delou inner triangulation and a weighted interpolation method; secondly, based on the compensated data, the outer cylindrical surface and the tooth top plane of the face gear are accurately fitted through an iterative optimization algorithm, an accurate measurement coordinate system is established, and the initial phase of the C axis is optimized; and finally, reconstructing an actual tooth surface by adopting a two-stage NURBS curved surface fitting method, and calculating a normal deviation. According to the method, an error propagation chain is effectively cut off through a strict execution sequence, the overall precision and reliability of on-machine measurement are remarkably improved, and a key technical support is provided for face gear closed-loop manufacturing.

This utility model relates to the field of molding die technology and discloses a precision positioning secondary molding die, including a base. A first positioning mechanism is provided on the top of the base, and a second positioning mechanism is provided on the rear side of the base. Limiting posts are fixedly connected to the left and right sides of the top of the base. A lower die is inserted into the top of the base, and connecting blocks are fixedly connected to the left and right sides of the lower die. Pins are inserted into the connecting blocks. In use, when the rectangular steel plate after punching needs to be further processed for secondary molding through the first positioning mechanism, the first hydraulic cylinder drives the moving table and the upper die to move down precisely. The limiting sleeve slides along the limiting post and cooperates with the limiting shaft to limit the connection between the moving table and the upper die, ensuring that the alignment error between the upper die and the lower die is minimal. The second hydraulic cylinder pushes the limiting plate to contact the workpiece on the top of the lower die, limiting the displacement of the workpiece from the front and back direction. The cooperation of the pins and the fixed shaft securely installs the lower die on the base.

The utility model provides a kind of track inertial navigation measurement system, including track detection car, two wireless digital display displacement meters are symmetrically arranged and are installed in the downside of track detection car horizontal axis by connecting seat, and the mobile measuring end of one wireless digital display displacement meter is slidably connected to the downside of track detection car by sliding piece, the bottom of sliding piece is connected with first rolling piece, and the mobile measuring end of another wireless digital display displacement meter is connected with second rolling piece, and first rolling piece and second rolling piece are respectively rollingly connected to the inside standard track gauge of left and right tracks, and automatic leveling base is connected to the upper side of middle part of track detection car by fixing part and is built-in with multi-axis sensor.The utility model can directly measure track gauge value by two wireless digital display displacement meters, three-dimensional coordinate measurement component can obtain the three-dimensional coordinates of the center of automatic leveling base, then according to the azimuth angle, inclination and track gauge value measured by multi-axis sensor, the three-dimensional coordinate values of left and right tracks are calculated, so that the space attitude of track can be quickly measured for the initial adjustment of track.

The pipe joint comprises an upper portion, a middle portion and a lower portion, and the upper portion, the middle portion and the lower portion jointly form a through circulation channel. An annular insertion block is arranged on the top face of the upper portion, a circle of platform is arranged on the periphery of the annular insertion block, a sunken solder groove is formed in the side, close to the annular insertion block, of the surface of the platform, and dual positioning of the annular insertion block and the platform facilitates reduction of welding alignment errors. A plurality of through screw holes are formed in the lower part; the outer diameter of the cylindrical structure where the first vertical face is located is larger than the outer diameter of the middle portion and smaller than the outer diameter of the lower portion, the middle portion is concave inwards relative to the upper portion and the lower portion, and the concave structure of the middle portion serves as a thermal expansion buffer area and is matched with smooth transition of the first inclined face, so that the welding thermal stress concentration coefficient can be effectively reduced, thermal deformation is reduced, and the welding seam cracking rate is reduced. According to the pipe joint for the plate heat exchanger, through the stepped axial structure, a multi-stage positioning reference and stress dispersion system is formed, and the comprehensive performance of the pipe joint can be remarkably improved.

A tunnel MJS construction method foundation reinforcing device and a method for using the same, the reinforcing device comprising a rack, a grouting machine, an infrared emitter, an infrared receiver, a first mounting assembly, a second mounting assembly, the infrared emitter being rotatably connected to one side of a grouting rod on the grouting machine through the first mounting assembly, the infrared emitter being coaxial with the grouting rod on the grouting machine when the first mounting assembly is rotated to a first position, the second mounting assembly comprising a positioning disc, a gear and a plurality of support rods, the infrared receiver and the gear being coaxially arranged on the positioning disc, the support rod comprising a fixed rod and a rack, one end of the rack being engaged with the gear, and the other end of the rack being fixedly connected to one end of the fixed rod, the gear being used to drive the plurality of fixed rods to synchronously extend until the other end face of the fixed rod is in contact with the inner wall of the grouting hole. The design realizes the alignment of the grouting hole and the grouting hole through the matching of the infrared emitter and the infrared receiver, and has small alignment error and good precision.

A display device, an optical device, and an electronic device are provided. The display device includes: a substrate; a first electrode on the substrate; a pixel defining film on the first electrode; a light emitting stack on the first electrode and the pixel defining film; a second electrode on the light emitting stack; and an encapsulation layer on the second electrode, in which the encapsulation layer includes a plurality of sub-encapsulation layers, and at least two ends of the plurality of sub-encapsulation layers are aligned in one direction.

The utility model discloses a vertical boom, including flange cover and section, the outer surface one side of flange cover is equipped with flange body, and flange body fixed sleeve is connected in the outer surface of section, the outer surface one side of flange body is fixedly connected with support plate, the outer surface one side of support plate is fixedly connected with steel pipe, the top and bottom of steel pipe all are fixedly connected with bearing assembly, and two bearing assemblies are rotatably connected with the swing arm of common. The top of swing arm is equipped with the jib that penetrates to the bottom. In the utility model, through adopting the swing arm support structure of symmetrical arrangement of double bearing assembly, effectively solved the radial wobble problem of traditional boom because of single point support. Specifically, the rigid support system of sealing bearing and bearing seat that is symmetrically arranged up and down forms, makes swing arm always keep stable axial motion track in the rotation process, eliminates the phenomenon of deflection because of uneven force.

This invention discloses a method for centering and flash welding rails, belonging to the field of rail welding technology, to solve at least one of the problems in existing technologies: poor centering accuracy of rail samples and residual misalignment after rail centering and welding. The centering method of this invention includes: placing multiple linear laser sensors on the side and top surfaces of the rail head of two rail samples respectively; measuring the deviation of the side surfaces of the rail head of two rail samples, determining if the deviation is below a threshold; measuring the deviation of the top surfaces of the rail head of two rail samples, determining if the deviation is below a threshold; if not, controlling the movement of electrodes on the welding rig to adjust the relative position of the two rail samples in the vertical direction, so that the deviation of the top surfaces of the rail head of the two rail samples is below the threshold. This invention can be used for rail centering and flash welding.

This invention discloses a broadband dielectric resonant antenna for 5G communication, comprising a substrate assembly and a dielectric resonator. The substrate assembly includes a dielectric substrate with a top ground layer on its top surface. A coupling slot and the dielectric resonator are located on the top ground layer. The dielectric resonator comprises four rectangular bodies and three dielectric arms. Adjacent rectangular bodies are connected by dielectric arms. The four rectangular bodies and three dielectric arms are integrally formed into a single structure, with a rectangular slot in the center of each rectangular body. This broadband dielectric resonant antenna for 5G communication has a simple and compact structure, small overall size, and low production cost. By integrating the four units through dielectric arms, the dielectric resonator only needs to be installed once, significantly reducing alignment errors during unit installation and ensuring antenna performance. This dielectric resonant antenna can cover the N257, N258, and N261 frequency bands in 5G communication, achieving broadband coverage.

This utility model discloses a clamping device for screen production. It relates to the field of screen production technology and includes: a clamp, with a linkage device slidably connected to the inner wall of the clamp and an anti-slip device fixedly connected to the outer wall of the clamp. The linkage device includes a limiting rod, and a control handle is symmetrically threaded to the outer wall of the limiting rod via a threaded line. By setting the linkage device and the limiting rod, multiple clamps are symmetrically slidably connected and linearly arrayed along their outer walls, enabling multiple clamps to simultaneously clamp the screen. This multi-point coordinated action can evenly distribute the clamping force to multiple edge positions of the screen, avoiding the problem of excessive local force that occurs when using traditional single-point or few-point clamping. It is especially suitable for large-size screen production, effectively reducing the risk of screen breakage and deformation due to uneven force. The slider achieves the purpose of fixing the clamp through its sliding connection with the limiting rod.

The disclosure provides an engineering quantity determination method and system based on laser point cloud cross section extraction, relating to the technical field of engineering survey. The method comprises: determining a plurality of cross section extraction positions by using a design three-dimensional chamber axis, and generating a transverse section line perpendicular to the design three-dimensional chamber axis at each cross section extraction position; performing point cloud search and slicing processing on the chamber point cloud data by using each transverse section line to obtain cross section point cloud data at each cross section extraction position; generating an excavation transverse section at each cross section extraction position by using the cross section point cloud data; generating a design transverse section at each cross section extraction position by using the design three-dimensional chamber axis and the design chamber transverse section, and matching the excavation transverse section and the design transverse section at the same cross section extraction position to obtain cross section comparison data at each cross section extraction position; and determining the excavation difference engineering quantity corresponding to the target chamber by using the cross section comparison data.

This application relates to a watertight connector, belonging to the field of underwater equipment, including a plug, a socket, and a locking screw. The plug housing has a plug receiving cavity, and a plug core is disposed within the plug receiving cavity, including a plug pin and a plug insulating core, with the insulating core covering the plug pin. The socket housing has a socket receiving cavity, and a socket core is disposed within the socket receiving cavity, including a socket pin and a socket insulating core, with the insulating core covering the head of the socket pin and an insertion hole corresponding to the head of the socket pin. The end of the socket housing has an annular insertion groove, and the plug housing has an insertion sleeve corresponding to the annular insertion groove. An annular sealing groove is provided on the outer peripheral wall of the insertion sleeve, and a first sealing ring is filled in the annular sealing groove. The plug and socket are mated and inserted, and the insertion is sealed by the first sealing ring. The locking screw further locks the plug and socket. This application improves the sealing performance of the watertight connector and facilitates disassembly.

The utility model discloses aluminum plate roll automatic winding device, including the bottom plate, the top of bottom plate is equipped with the deviation rectification subassembly for rectifying the deviation of aluminum roll before winding automatically, the utility model discloses the closed -loop rectification system of CCD laser scanner and electromagnetic actuator array assembly constitution, realizes dynamic real -time rectification, and the alignment error has been reduced, and simultaneously the air curtain nozzle assembly forms multidimensional protection, and high -speed airflow can blow away aluminum scrap to break the impurity adsorption path, and the gas film can physically isolate aluminum roll and magnetic pole surface, and the continuous airflow can also assist to take away part eddy current heat, and the water -cooling circulation system of cooperation electromagnetic actuator, help to reduce the rectification precision attenuation of equipment continuous operation because of temperature fluctuation, still through the tension monitoring module of force transducer and signal amplifier composition, improved production efficiency while the reduction effect of surface scratch of combination air curtain protection, further improved finished product quality and equipment capacity.

The utility model discloses a kind of starry sky roller blind mechanism for car, comprising: main frame, fixed in sunroof roof interior, the main frame includes shell, slide rail and limit board;Roller blind cloth, roller blind cloth adopts three-layer composite structure, from inside to outside in turn is light-blocking base layer, buffer middle layer and light-transmitting surface layer;Optical fiber bundle, optical fiber bundle is in buffer middle layer in "S" shape path extension to avoid excessive stretch when winding up.Optical fiber bundle penetrates the three-layer structure of roller blind cloth, output end is flush with light-transmitting surface layer and is not outstanding, and the friction scratch when winding up is completely eliminated;Buffer middle layer in "S" shape path design, so that optical fiber can be along path slightly deformed when winding up stretch, avoid direct stress fracture, ensure that there is no extrusion when optical fiber winding, and optical fiber fracture rate is greatly reduced.

A kind of mass quantum definition electric balance and its using method belong to metrology science and quality measurement technical field.Base has worm gear lifting assembly and laser interferometer and PSD assembly, with support frame connection, and flexible hinge weighing mechanism is arranged in movable end of worm gear lifting assembly;Support frame has permanent magnet system, and the middle part of permanent magnet system has vacuum air float guide rail, and vacuum air float guide rail is matched with flexible hinge weighing mechanism, and upper and lower ends are connected with support frame, and support frame is connected by auxiliary rod, auxiliary rod is connected with induction coil, and induction coil is in the middle part of permanent magnet system, and support frame is connected with counterweight.The invention adopts vacuum air float guide rail and is connected with induction coil by rigid connection design, suppresses the horizontal displacement and rotation change of induction coil in space, reduces force vector alignment error, improves mass measurement precision, shortens work path and limits space motion posture change, realizes fast and accurate balance force zero position measurement, improves operation efficiency.

The utility model provides an automatic chip mounting device for a battery array. The automatic chip mounting device comprises a pick-and-place mechanism, a dispensing mechanism, a platform mechanism and a movement mechanism. According to the utility model, the visual assembly is combined with the multi-axis module to realize high-precision placement and attachment of the cells, so that the alignment error of the cells and the cellular board is extremely small, and the photoelectric conversion efficiency is improved. And meanwhile, the double-screw dispensing mechanism is adopted, so that bonding failure caused by glue overflowing or insufficient glue amount is avoided. In addition, the suction cup assembly can grab a plurality of batteries at a time, and the production efficiency is improved.