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

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 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 comprises 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 being larger in size than the intermediate layer and the patterned resin layer, the intermediate layer being more flexible than the patterned resin layer, and the patterned resin layer having 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.

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 discloses a flatness tester and the using method for the tester. The tester is provided with a seat tube, at sides of which lugs are provided, on the lugs, adjusting bolts are provided through internal threads; in the seat tube, a shaft rod is provided, which is fixed in the seat tube by a bearing; the upper end of the shaft rod is provided with a balance arm that extends toward two sides; the balance arm is vertical to the shaft rod; the bottom of the shaft rod is a flat guideway with high flatness; the guide way is vertical to the shaft rod; on the guideway, a measuring instrument that can slide on the guideway is mounted. By the adjusting bolts, the central line of the shaft rod can be adjusted to coincide with a reference line, so that the guideway is parallel with an ideal plane; moving the measuring instrument to different locations on the guideway and rotating the shaft rod can measure the difference from points on the circumferences of different radiuses to the guideway, hence calculate the flatness of the measured plane. The invention has few components, simple structure, and low cost. By measuring flatness through measuring the distance difference from points on the plane to the guideway, so long that the flatness of the guideway is high, the accuracy of the measuring instrument is high, the accuracy of the flatness measurement will be very high.

The invention discloses a sapphire substrate polishing device and a polishing process. A rotating shaft is rotatably mounted on a frame, a polishing table is fixed to the top end of the rotating shaft, a crystal polishing pad is fixed to the upper surface of the polishing table, an abrasive feeding mechanism is arranged above the crystal polishing pad, a fixing ring is mounted on a mechanical armthrough a rubber wheel, a substrate fixing disk is arranged in the fixing ring, a pressing mechanism for pressing a sapphire substrate fixed by the substrate fixing disk towards the crystal polishingpad is arranged above the substrate fixing disk, the crystal polishing pad is formed by adhering crystal chips of the same thickness onto the upper surface of the polishing table through ultraviolet glue, and the gap between each two adjacent crystal chips ranges from 0.5mm to 2mm. After polishing, the planeness of the sapphire substrate is smaller than 5 micrometers, the surface roughness of thesapphire substrate is smaller than 0.3 nanometer, the surface of the substrate is not provided with complicated products, complicated post cleaning is omitted, cost is saved, and the rate of finishedproducts is increased.

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 aim of the invention is to fabricate lens with high plane precision. The method includes: preparing a glass equipment 12 in a triangular prism shape and forming a medium multilayer film 11 on a film forming face 10C of the glass equipment 12. The forming face 10 is distorted by stress generated on the medium multilayer film 11, but before the medium multilayer film 11 is formed, a curved surface shape is preformed on the film forming face 10C, so that a concave or a convexity is formed in a direction opposite to the stress generated on the medium multilayer film 11. In addition, the curved surface shape is formed on the film forming face 10C according to a complanation curvature of the film forming face 10C when the medium multilayer film 11 is formed. Due to correction is performed while the medium multilayer film 11 is formed on the film forming face 10C, complanation of the film forming face 10C can be achieved. Thereby, the medium multilayer film 11 will not distort and problems such as aberration and the like can be eliminated.

In a support beam connecting structure used for a floor of a building, each of a first and a second support beam has two reference slant faces formed opposed to each other, and a joint member has connecting reference slant faces opposed to each other. The reference slant faces of one of the first and second support beams and the connecting reference slant faces of the joint member are made close contact with each other, and the one support beam and the joint member are secured to each other by a bolt and a nut, whereby the one support beam and the joint member are connected together while centering them in a vertical direction. Then, the other support beam and the joint member are secured to each other by a bolt and a nut. Therefore, when the first support beam and the second support beam, which are disposed perpendicular to each other, are connected together by the joint member, the upper faces of the first support beam and the second support beam can be made easily and precisely flush with each other on a plane.

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 a magnetostriction coefficient measuring device comprising a gas floating platform, a laser vibration measurement instrument, an excitation unit, a reflective sheet self-adhering unit, a sliding unit and a sampling unit. The sliding unit includes one pair of guide rails and a U-shaped guide rail installed on the guide rails in a sliding manner. The sampling unit includes amechanical gripper installed at the U-shaped guide rail in a sliding manner, a front sucking disc arranged at one end of the mechanical gripper, a rear sucking disc arranged at the other end of the mechanical gripper, a sample to-be-tested frame, a sample measuring frame, and a sample recycling frame, wherein the sample to-be-tested frame, the sample measuring frame, and the sample recycling frameare arranged between the guide rails. The reflective sheet self-adhering unit includes an electric turntable disposed beside the sample to-be-tested frame and an electromagnetic chuck mounted on themechanical gripper. According to the magnetostriction coefficient measuring device, the reproducibility of measuring a magnetostrictive strain amount and a noise level value of an oriented electricalsteel sheet can be controlled to be less than 3%; and the measurement accuracy exceeds the control requirements of the laboratory. Besides, the non-contact measurement of the magnetostriction coefficient of the electrical steel sheet is realized and the efficiency is high.

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 an A frame detection platform which comprises a cast iron plate, a pair of tripods, reference blocks, a back baffle plate, a front clamping device, a bolt, a back baffle frame, a positioning pin, an A frame, and a lateral positioning block, wherein the two tripods are symmetrical assembled at two ends of the cast iron plate, a 72-degree plane is formed by the two slopes of the tripods, the inner side symmetrical position of each of the tripods is fixedly equipped with the reference blocks which provide A frame left and right position references, the back baffle plate and the back baffle frame are connected by the bolt to form a whole body which is fixedly assembled on the cast iron plate, the front clamping device is fixed to the cast iron plate by a movable bolt, and one side of the front part of the cast iron plate (1) is removably equipped with the lateral positioning block (10). According to the A frame detection platform, the detection of the A frame for the glass substrate production can be realized.

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 coupling height measuring scale and relates to the measuring technology field. The measuring scale comprises a pedestal which is provided with a gauge stand hole. The gauge stand hole is provided with a gauge stand, a copper sleeve is arranged in the gauge stand, and a digital display dial indicator is arranged in the copper sleeve and is fixed by a set screw. A lower endof the pedestal is set to be a measured protruding platform, and a side surface of an upper end is provided with an overlapping curve. The side surface of the copper sleeve is provided with a throughgroove with a width of 1 mm. Problems that when commonly used measuring tools, such as a depth gauge and a dial indicator, are used to measure a distance value between an end surface of shaft bossingof the coupling and the end surface of a motor main shaft, measurement is difficult, an error is large and efficiency is low due to a condition limit of a measuring part can be solved.

The invention discloses a calibration plate with high-precision and low-cost for visible / infrared camera calibration and a calibration method thereof. The calibration plate comprises a substrate, a spread layer, a transition layer, a heating layer and an insulation layer. The substrate is a rectangular metal plate, the surface of the substrate is treated with black oxidation, and the upper surfaceis coated with a spread layer of the same material as the substrate. The spread layer is processed in accordance with the chess board pattern using a high-precision machine tool. The checkerboard pattern with obvious color contrast can meet the calibration of visible light camera. The transition layer, the heating layer and the insulation layer realize the function of uniformly heating the substrate, and the calibration of the infrared camera can be realized due to the difference in surface emissivity of different regions. The calibration plate has simple manufacturing process, high precisionand low cost, and can be widely used in the field of camera calibration.

The invention provides a high-precision water channel reconstruction method based on multi-star-source information coupling. The method comprises a water channel section determination method, a basic water channel section high-precision coupling reconstruction method, a fixed water channel section coupling reconstruction method and a river reach water channel terrain reconstruction method. According to the method, the blank of surveying and mapping a water channel based on satellite remote sensing information is filled up, the vertical and plane precision of an existing satellite digital surface model for the river water channel is greatly improved, and decision support can be provided for wading emergency rescue in areas lacking data.

The invention discloses a scarping tool for a bearing pad. The scraping tool comprises a linear flat edge. The scraping tool for the bearing pad provided by the invention is provided with the linear flat edge. When the bearing pad needs to be scraped, the knife edge of the linear flat edge is attached to a scraped surface, and the scraping tool is pressed to scrape once from a scraping position to the end part of a pad port. The knife edge of the scraping tool provided by the invention is a straight line and is in plane-line contact with the scraped surface instead of point contact, so that a large-area scraped surface can be scraped conveniently through one-time scraping, and the scraping efficiency is increased greatly. Line contact is adopted, so that the linearity of a straight line which is vertical to a scraping direction on the scraped surface can be ensured, and the planar accuracy of the scraped surface can be increased.

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 invention belongs to a clamping method of mechanical grinding machine machining and particularly relates to a flexible tool used for grinding and a grinding method. The flexible tool used for grinding and the grinding method are suitable for performing grinding on the plane portion of parts easy to deform. Bearing inner and outer ring matched rings belong to thin-walled parts, and are easy to deform and high in planeness and parallelism requirement. The flexible tool comprises a magnetic attracting workbench, and further comprises a flexible standard block, a first fixed standard block and a second fixed standard block; supporting is provided for the parts on the magnetic attracting workbench through the flexible standard block, the first fixed standard block and the second fixed standard block; the flexible stand block comprises an upper movable cushion block and a lower cushion block base; the upper movable cushion block and the lower cushion block base are made from a high magnetism conductivity material, and an inclined sliding matched face is arranged between the upper movable cushion block and the lower cushion block base; an upward force along the sliding matched face is provided for the movable cushion block through a compression spring; and the movable cushion block moves downwards along the sliding matched face under the gravity G of the parts. The parallelism and planeness precision during part grinding is improved.

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.