51results about How to "High plane precision" patented technology

A resin stamper is provided that is intended for use in an optical transfer-based nanostructure transfer apparatus and which is capable of automatic transport and alignment. The resin stamper includes a support member made of a light transmitting material and having mechanical strength, an intermediate layer also made of a light transmitting material, and a patterned resin layer which is also made of a light transmitting material. The support member is larger in size than the intermediate layer and the patterned resin layer. The intermediate layer is more flexible than the patterned resin layer. Also, the patterned resin layer has a pattern of high and low areas formed in a surface thereof that is the obverse of the pattern of high and low areas in a mold.

The invention provides a cloud control aerial image photogrammetry method for LiDAR point cloud data. The method comprises the steps that firstly, GPS / POS auxiliary aerial triangulation is conducted on an image, initial camera distortion and image orientation parameters are calculated, and meanwhile sparse feature point cloud and image three-dimensional feature lines are generated; secondly, rigidregistration is performed on the LiDAR point cloud and the image sparse feature point cloud through ICP and ICL algorithms, rigid transformation parameters of the sparse feature point cloud relativeto the LiDAR point cloud are calculated, and exterior orientation elements of the image are updated by using the rigid transformation parameters; and finally, regional network adjustment is carried out under the constraint of LiDAR point cloud control information, and image orientation parameters are optimized. Rigid registration and LiDAR constrained regional network adjustment are repeatedly iterated until the variation of the error in image orientation meets a preset threshold value. According to the method, large-proportion high-precision geometric orientation of the aerial image under thecondition of no field control point is realized by taking the LiDAR point cloud as a geometric reference without dependence on the field control point, and the efficiency of image photogrammetry processing in the information era is greatly improved.

In order to prevent deterioration of the flatness of a sheet-form workpiece, this laser processing device is provided with a work table, an outer periphery mounting unit (114), a first movable mounting unit (112), a second movable mounting unit (113), a workpiece restraining unit (121), a processing head unit (109), and a movable dust collection unit (123). The first movable mounting unit (112) and second movable mounting unit (113) are provided on the work table and inside of the outer periphery mounting unit (114), and can move vertically. The workpiece restraining unit (121) is provided on the outer periphery mounting unit (114), and the processing head unit (109) is provided above the first movable mounting unit (112) or the second movable mounting unit (113). The movable dust collection unit (123) is provided inside of the outer periphery mounting unit (114) and can move horizontally. This laser processing method involves a first laser processing step, a first step for lowering the second movable mounting unit, a first step for moving the dust collection unit, a first step for raising the first movable mounting unit, and a second laser processing step.

The invention belongs to the technical field of SAR antenna supporting and positioning, and particularly relates to an expandable plane supporting and positioning device for an SAR antenna. The devicecomprises an SAR antenna frame structure, a plane positioning device, an inter-antenna-plate connecting assembly, a star antenna connecting assembly, a star side panel, a star plate I and a star plate II, wherein the star side panel is arranged on the SAR antenna frame structure; the other end of the star body plate I is hinged with the star body plate II through an antenna inter-plate connectingassembly; the plane positioning device is arranged at the connecting end between the star plate I and the star plate II and used for self-locking and positioning when the star plate I and the star plate II are located in the same plane. Main functions are achieved through the lock pin structure, the mass of the SAR antenna unfolding mechanism is greatly reduced, and the satellite launching cost is greatly reduced.

The invention discloses an integrated shock absorption type engine accessory bracket device, belongs to an engineering part working together with an engine, in particular relates to a structural member or a combined piece which is connected through a screw, a clamping hoop and the like and used for fixing machine parts. The integrated shock absorption type engine accessory bracket device comprises a bracket main body and bracket mounting holes (8), a tension wheel mounting hole (3) and generator mounting holes (5) which are connected with the engine, wherein the tension wheel mounting hole (3) and a tension wheel positioning hole (4) are formed in a boss (93) on the left side face (close to the bottom) of the bracket main body; the generator mounting holes are formed in a U-shaped boss (95); the U-shaped boss is arranged at the bottom of the main body and is close to the right side; and the width of the U-shaped boss is smaller than that of the bottom of the bracket main body. The integrated shock absorption type engine accessory bracket device is specially arranged on a specially-shaped bracket and integrates multiple accessory mounting functions; the number of brackets and an occupied space are reduced; the precision of the plane of a wheel train is improved; and the manufacturing and maintenance costs are reduced. Moreover, the belt adjustment range is expanded; mounting is simplified; torque vibration is greatly reduced; the service life of a belt is prolonged; and therefore, the application level of the engine is improved.

The invention provides a cloud control aerial image photogrammetry method for LiDAR point cloud data. The method comprises the steps that firstly, GPS / POS auxiliary aerial triangulation is conducted on an image, initial camera distortion and image orientation parameters are calculated, and meanwhile sparse feature point cloud and image three-dimensional feature lines are generated; secondly, rigidregistration is performed on the LiDAR point cloud and the image sparse feature point cloud through ICP and ICL algorithms, rigid transformation parameters of the sparse feature point cloud relativeto the LiDAR point cloud are calculated, and exterior orientation elements of the image are updated by using the rigid transformation parameters; and finally, regional network adjustment is carried out under the constraint of LiDAR point cloud control information, and image orientation parameters are optimized. Rigid registration and LiDAR constrained regional network adjustment are repeatedly iterated until the variation of the error in image orientation meets a preset threshold value. According to the method, large-proportion high-precision geometric orientation of the aerial image under thecondition of no field control point is realized by taking the LiDAR point cloud as a geometric reference without dependence on the field control point, and the efficiency of image photogrammetry processing in the information era is greatly improved.

The invention discloses a plane constraint error model and a robot self-calibration method. The method comprises the following steps of 1, establishing a robot kinematics model; 2, establishing a robot tail end position error model; 3, establishing the plane constraint error model; 4, driving a robot to measure the constraint plane; 5, identifying kinematics parameters of the robot; and 6, verifying the calibration result. The plane constraint error model and the self-calibration method have the beneficial effects that firstly, cost is low, wherein one calibration block with relatively high precision is needed, and cost not exceeds one thousand while the advanced measuring equipment tends to be tens of thousands or more millions in cost; secondly, a plane accurate spatial equation can be obtained, compared with a traditional plane constraint calibration method, the calibration precision is improved; thirdly, compared with a traditional plane constraint error model, the error model is greatly simplified; and fourthly, the calibration block can be placed in the working space of the robot in any posture, and the difficulty of calibration experiments is reduced.

A ball array mask includes: a metal mask, which includes through holes into which minute balls are inserted, and which is positioned at a location above an object to be mounted; a hollow frame; a stretchable sheet, edges of the metal mask being affixed to the hollow frame by the stretchable sheet; and projection members that are attached to respective corners of the metal mask so as to pull the metal mask outwardly.

The invention relates to a large vertical water pump centering device capable of presetting offset and a method for presetting offset, and belongs to the technical field of water pump centering. The device comprises a disc type centering support and an adjustable steel wire heavy punch device. The disc type centering support comprises an installation disc and a centering platform, and the centering support is fixedly connected with the centering platform. The adjustable steel wire heavy punch device comprises an annular mounting base plate located at the bottom, and an annular working platformon the top. The working platform and the mounting chassis are fixedly connected through a plurality of supporting columns. A bottom sliding rail is fixedly connected to the surface of the working platform through pins. A first sliding block is arranged on the surface of the bottom sliding rail in a sliding mode. And a second sliding block is slidably arranged on the top face of the first slidingblock, a steel wire heavy punch retracting and releasing mechanism is fixedly connected to the top of the second sliding block, a first sliding block driving mechanism is connected to the rear end ofthe first sliding block in the sliding direction, and a second sliding block driving mechanism is connected to the rear end of the second sliding block in the sliding direction.

The aim of the invention is to provide a silent chain which realizes excellent left-and-right balance and stable engaging with low vibration in the width direction of chain through the exterior and interior random arrangement of link plate, restrains the fatigue damage of link plate and abrasion extending of chain, reduces the load of chain assembling and load of manufacturing precision. In the silent chain (100), after the inner engaging surfaces (111b) of link plates (111) which are parallel arranged on the width direction of chain with an exterior and interior random arrangement engages with the sprockets, the external engaging surfaces (111c) of the link plates (111) engage with an on-station state thereby transmitting power, wherein, the inner engaging surfaces (111b), the inner pin-hole surfaces (111a) and external engaging surfaces (111c) which are blanked by punching on the link plates (111) are provided with shearing surfaces simultaneously formed on more than 70% of the plate thickness using the gear shaving processing after punching.

A joint positioning method for spatial points by means of onboard LiDAR point cloud and high resolution images includes the steps: denoising original LiDAR data; generating a high-precision DEM (digital elevation model); manually supplementing elements of exterior orientation of images acquired by high-precision POS (point-of-sale) data; calculating object-side coordinates (X, Y and Z) of identical points by means of multi-image forward intersection after calculating initial values by means of two-image forward intersection by the aid of two optional points among the selected identical points; and obtaining precise object-side coordinates (X, Y and Z') corresponding to the identical points by the aid of the object-side coordinates of the identical points solved by means of previous multi-image forward intersection. By means of multi-image forward intersection realized on the premise of elevation constraint of the LiDAR point cloud, object-side coordinates of acquired image points are quite high in plane precision and elevation precision.

The invention provides a high-precision water channel reconstruction method based on multi-star source information coupling. refactoring method. The invention fills the blank of surveying and mapping waterways based on satellite remote sensing information, greatly improves the vertical and plane accuracy of existing satellite digital surface models for river waterways, and can provide decision-making support for wading emergency rescue in areas lacking data.

The invention discloses a coating for mineral cast guide surfaces, a preparation method thereof, and a guide surface having the coating. The coating comprises, by weight, 20-35% of silicon carbide, 15-25% of silicon micro-powder, 15-25% of solid glass beads, 15-25% of epoxy resin, 0.01-0.06% of a leveling agent, 0.02-0.1% of a dispersing and anti-settling agent, 0.01-0.06% of hollow glass beads, 0.03-0.05% of a toner, 3.0-7.0% of an amine curing agent and 0.5-1.5% of a curing accelerator. A coating layer formed after coating mineral cast guide surface with the coating and carrying out compression molding increases the rigidity and the wear resistance of the mineral cast guide surface, greatly improves the planar precision of the guide surface, controls the precision to be in 10 [mu]m, and reduces the thermal deformation coefficient of the guide surface by 50% or above.

The invention discloses a magnetostrictive coefficient measuring device, comprising an air-floating platform, a laser vibrometer, an excitation unit, a reflective sheet self-adhesive unit, a sliding unit and a sampling unit; the sliding unit includes a pair of guide rails and is slidably installed U-shaped guide rail on the guide rail; the sampling unit includes a mechanical gripper slidably mounted on the U-shaped guide rail, a front suction cup arranged on one end of the mechanical gripper, a rear suction cup arranged on the other end of the mechanical gripper, and a mechanical gripper arranged on the guide rail. The sample frame to be measured, the sample measurement frame and the sample recovery frame are between; the self-adhesive unit of the reflective sheet includes an electric turntable arranged next to the sample frame to be measured and an electromagnetic chuck installed on the mechanical gripper. The measuring device measures the magnetostrictive strain amount of the grain-oriented electrical steel sheet and the reproducibility of the noise level value can be controlled within 3%, and the measurement accuracy exceeds the control requirements of the laboratory; at the same time, the measuring device realizes the magnetostrictive coefficient of the electrical steel sheet. non-contact measurement with high efficiency.

The invention discloses a checking tool shared by manual and automatic gear pedal assemblies of automobiles. The XYZ three-way detection block of the automatic gear pedal pad and the XYZ three-way detection block of the manual gear pedal pad are arranged on the left side of the table, wherein The XYZ three-way detection block of the automatic transmission pedal pad is fixed, and the XYZ three-way detection block of the manual transmission pedal pad is set on the guide rail of the table, which can be slid on the table to adjust the position so that the manual and automatic transmission pedals of the same model can be detected with the same inspection tool; and The clamping pliers are set to clamp the workpiece, the positioning block is used to position the workpiece, and the detection block is set to detect the size, which can detect the size with high precision; the invention not only makes the installation hole size accuracy and flatness accuracy of the manual and automatic gear pedal assembly of the automobile And the position degree is higher than the technical requirements, and it is supplied to the OEM in the form of an assembly, which reduces the line stoppage of the OEM due to unstable dimensions and improves the efficiency.

The invention discloses an assembling method of a refrigerator casing inner cooling tube. Inner cooling tube automatic stretching equipment comprises a rack and two sliding platforms. The sliding platforms are arranged on the rack in a sliding manner. The rack is provided with a driving mechanism, wherein the driving mechanism is used for driving the sliding platforms to slide; each sliding platform is provided with multiple guiding rollers; and each sliding platform is further provided with a clamping assembly, wherein the clamping assemblies are used for locating and clamping the inner cooling tube. By means of the assembling method, machining efficiency of the inner cooling tube can be improved, and the machining and forming effect is optimized.