63 results about "Reference alignment" patented technology

Inclinometer and directional field sensor readings can have gain, offset, and non-orthogonality errors, as well as reference alignment rotation errors. When a series of readings are taken by a three axis sensor with a variety of different orientations, the resulting dataset looks like a perfect hypothetical sphere in the absence of any errors; with errors as mentioned above the dataset looks like an offset, rotated, ellipsoidal quadratic surface. This invention provides a simple method of removing the above errors from a tilt reference device. A disclosed algorithm is divided into two distinct components: the ellipsoidal quadratic surface component, which covers gain, offset, and axis misalignment; and the rotation component, which covers rotation relative to a set of reference axes. The solution presented here addresses both components combined, or separated and for inclinometers, magnetometers and rate sensors.

The invention provides a numerical control machining clamping and positioning device for a large thin-wall conical shell part and belongs to the technical field of numerical control machining. The numerical control machining clamping and positioning device aims at solving the problems that when machining is conducted without an external clamping and fixing tool, the final size is difficult to guarantee, the part scrapping phenomenon is likely to happen, and the amount of feed is usually reduced in order to avoid the situation, so that machining efficiency is low, time is wasted, and the period is long. A conical barrel is supported on a workbench through supporting bolts of the clamping and positioning device, and the large-diameter end of the conical barrel is placed upwards; the machined workpiece is placed in the conical barrel, and the machined workpiece and the conical barrel are coaxially arranged; and a large-end conical ring liner plate is pressed on a large-end conical stop opening of the machined workpiece, and the machined workpiece is axially fixed through pressing plate bolts and pressing plates. It is guaranteed that the machined thin-wall conical shell part is not deformed in the machining process; angular reference alignment is convenient, and axial positioning is accurate; the structure is simple, and clamping and fixing are reliable; and the manufacturing period is short, and cost is low.

A method is provided for enhancing edge detection for edges of irregular surfaces in a machine vision inspection system. The inspection system comprises an edge feature video tool configured to determine profile data for an edge feature based on a plurality of differently focused images. An edge-referenced alignment compensation is provided related to substantially minimizing a respective offset amount of the edge feature at respective locations along a directional filtering direction used for directionally filtering the plurality of differently focused images prior to determining the profile data for the edge feature. In some embodiments, the plurality of differently focused images may be directionally filtered using a directional filtering sub region (DFS) defined relative to a point corresponding to a PFF basis pixel location in each of the plurality of images, each DFS having a relatively longer dimension along the directional filtering direction.

The invention relates to a laying machine. The laying machine comprises a machine body, travelling wheels, a reference alignment device and a loading laying device, wherein the travelling wheels are fixed at the bottom of the machine body, a handle is arranged at the front part of the machine body, the reference alignment device is mounted on the upper end surface of the machine body, and the loading laying device is mounted at the middle part of the upper end of the reference alignment device. The laying machine disclosed by the invention has the advantages of being reasonable in structural design, high in automation degree, convenient to operate and control, and the like, can realize automatic laying of ceilings, replaces a traditional manner that builders climb a ladder for laying, improves the laying efficiency and has the protective effect on the builders.

This liquid crystal display device (100) includes: a vertical alignment liquid crystal layer (30); first and second substrates (10, 20); first and second electrodes (11, 21) arranged on the first and second substrates to face the liquid crystal layer; and two photo-alignment films (12, 22). Each pixel region includes first and second liquid crystal domains, of which the reference alignment directions defined by the two photo-alignment films are a first direction and a second direction different from the first direction, respectively. The first electrode has a slit cut region (11R1), through which a slit (11s) has been cut to run substantially parallel to the reference alignment direction, in a part of a region allocated to each of the first and second liquid crystal domains. The width (W) of the slit is set so that when the highest grayscale voltage is applied to the first electrode, an effective applied voltage decreases by at least 0.5 V and the alignment direction of liquid crystal molecules (30a) shifts with respect to the reference alignment direction by less than 45 degrees.

The invention discloses a gear scanning algorithm for template matching and point cloud comparison. The method comprises a line scanning algorithm, a splicing algorithm, a model matching algorithm anda model comparison algorithm, and the main working logic is that a line laser scans the surface contour of a workpiece through the movement of a linear module, and each section contour of the workpiece is obtained through the analysis and calculation of the line scanning algorithm; splicing the obtained section contours in real time through a splicing algorithm to obtain a three-dimensional pointcloud of an actual workpiece; aligning a theoretical three-dimensional model and the actual three-dimensional point cloud as a reference through a model matching algorithm; comparing the two three-dimensional models subjected to reference alignment to obtain the defect information of each gear. According to the method, a rapid algorithm for scanning the gears and determining the defect positionsis realized through the combination of various algorithms and hardware data, so that the speed and accuracy of determining the defect positions of the gears are greatly improved, and the subsequent determination of the positioning parameters for repairing the gears is facilitated.

An airframe butt joint attitude-adjusting method meeting stringer reference alignment and straightness requirements includes the steps: measuring end face reference points and linear guide rail reference points of a fixed airframe section and an attitude-adjusting airframe section and coordinates of the position of an attitude-adjusting system three-dimensional positioner connector connected with the attitude-adjusting airframe section by a laser tracker; building airframe end face reference point matching and straightness matching target functions, and accordingly building a mathematic model for airframe butt joint attitude-adjusting calculation; performing iterative calculation for the airframe butt attitude-adjusting model by a Gauss-Newton method to obtain coordinates of optimal butt joint positions of the attitude-adjusting airframe section and the fixed airframe section and obtain a transformational matrix from an initial position to a target position; calculating the coordinates of the target position of an attitude-adjusting system three-dimensional positioner connector connected with the attitude-adjusting airframe section according to the obtained transformational matrix, and butting the attitude-adjusting airframe section and the fixed airframe section by controlling movement of the attitude-adjusting system three-dimensional positioner from the initial position to the target position.

The invention provides an apparatus and a method for focal plane change measurement. The measurement method comprises the following steps of entering a reference state, calibrating a position of a reference exposure focal plane, updating inclination of a cornerstone relative to the reference exposure focal plane, aligning a reference mask to obtain a reference alignment focal plane change amount and calculate a position of the reference alignment focal plane, measuring the height and a tilt value of a reference leveling point of a workpiece table datum plate by using a focus and level sensor when the workpiece table datum plate moves to the reference position vertically; starting an exposure process, calculating a drift distance of zero plane of the focus and level sensor before wholly leveling the base; aligning a real mask, and calculating a real alignment focal plane change amount to obtain a position of the real alignment focal plane, thereby guaranteeing that the base is always at an optimum focal plane during the exposure.

The invention belongs to a tool design technology, and relates to a quick milling positioning device. A lot of irregular rotating parts exist in the field of mechanical manufacturing; and the parts are complex in appearance and incapable of being machined by a lathe, and need to be milled. As the parts are the rotating parts, are infirm in clamping on a milling machine and difficult in reference alignment, and have accumulation errors, the parts are low in machining efficiency, and the precision is difficult to satisfy assembly requirements. The quick milling positioning device of the rotating parts fixes the parts on the milling machine for machining through a pressing tool, and can adjust the machining positions of the parts through adjusting dowel pins. The quick milling positioning device solves the milling machining problem of the rotating parts on the milling machine, is high in part machining precision and stable in product quality, and improves the machining efficiency.

The invention discloses an alignment method for an exposure machine. The alignment method comprises the following steps of taking any one of multiple alignment marks from a same alignment region as the reference alignment mark, and taking other alignment marks except the reference alignment mark as backup alignment marks; performing alignment by the reference alignment mark; choosing one of the backup alignment marks for performing alignment when the alignment is unsuccessful by the reference alignment mark; and when the alignment is also unsuccessful by the chosen backup alignment mark, repeatedly performing the operation of choosing one of the backup alignment marks for performing alignment. According to the alignment method for the exposure machine, after one time of wrong alignment occurs, the backup alignment marks are chosen automatically for performing alignment again; and therefore, the waste of production cost caused by automatic alarm and machine halt when the reference alignment is unsuccessful of the exposure machine, or the out-of-service of a substrate caused by partial failed alignment are avoided.

Methods and systems for determining one or more alignment parameters for use in a process performed on a specimen are provided. One method includes determining measures of similarity between images generated by an imaging system for corresponding locations in each of two or more pairs of dies on a specimen and performing cluster analysis based on the determined measures of similarity to identify the images that are most similar to each other and to assign different subsets of the images that are most similar to each other to different die clusters, respectively. The method also includes separately determining one or more alignment parameters for two or more of the different die clusters. The one or more alignment parameters are used for aligning images generated by the imaging system for the specimen or another specimen to a common reference.

The invention provides a three-dimensional range finder, which comprises: a shell; a supporting disc, wherein the shell is coaxially and rotationally arranged above the supporting disc, and a verticalpoint alignment device is fixedly arranged in the center of the bottom of the supporting disc; a reference alignment device, wherein the outer peripheral surface of the shell is fixedly provided withthe reference alignment device used for being aligned with a reference line; a distance measurement processing system comprising a data processing module, an interaction module and a distance measurement module, wherein the data processing module is electrically connected with the interaction module and the distance measurement module, and the measurement direction of the distance measurement module is perpendicular to the alignment direction of the reference alignment device; and a level adjusting device, wherein the supporting disc is provided with the level adjusting device used for keeping the shell horizontal. Through the cooperation of the reference alignment device and the level adjusting device, in combination with the arrangement that the measurement direction of the distance measurement module is perpendicular to the alignment direction of the reference alignment device, three-dimensional measurement can be accurately conducted on the distance and flatness of a to-be-measured wall, so that the measurement error is small, and use is convenient.

Currently, when base paper is replaced during corrugated board production, because no device for reference alignment exists, an operator performs alignment in a naked eye manner, the problem that deviation is large exists, and consequently the base paper consumed because of paperboard ridge exposing generated due to the fact that the base paper is not aligned with one another accounts for a large consumption proportion. The invention relates to the field of manufacturing industry and particularly provides an automatic paper receiving and aligning system for a corrugated board production line. The system comprises a control unit, a display unit, a fixing unit and a feeding-back unit. According to the system, by adding a movable monitoring alignment device, during machine table producing, paper changing and shifting of base paper in the manufacturing process, automatic identification is performed; the left and right positions of the remaining base paper are synchronously adjusted, and the purpose of automatic and synchronous alignment is achieved; and the malposition deviation generated because of manual naked eye alignment is avoided, the product ridge exposing is effectively eradicated, the alignment precision is high, the alignment speed is high, and the malposition of a paperboard is smaller than 2 mm.

Disclosed is an escalator system wherein when a handrail belt is moving from rotation of a plurality of elevator sheaves: a controller receives data from a plurality of sensors, identifies from the data a first sheave of the plurality of sheaves as comprising reference alignment value for the system, determines for the plurality of sheaves a respective plurality of alignment values, compares the plurality of alignment values with the reference alignment value, and provides a predetermined response when any of the plurality of alignment values diverges from the reference alignment value by morethan a predetermined amount.

A toner replenishing device of an image forming machine, including a toner cartridge receiving member (2) disposed in a machine body and having a cartridge inserting position and a cartridge mounting position; and a toner cartridge (4) having a container body with a toner discharge opening (88) and mounted detachably on the toner cartridge receiving member; wherein a reference alignment mark (111a) is provided at a machine body wall portion positioned above the toner cartridge receiving member, a first alignment mark (46a) is provided in the container body of the toner cartridge at a position opposite the reference alignment mark at the cartridge inserting position, and a second alignment mark (441a) is provided in the container body of the toner cartridge at a position opposite the reference alignment mark (111a) at the cartridge mounting position.

The invention relates to an inertial reference space-time accurate alignment method of an optical navigation sensor, and belongs to the technical field of Mars surround optical navigation sensor inertial reference alignment. The method comprises the following steps: step 1, when a normally working star sensor exists, entering step 2; otherwise, exiting the calibration process; 2, when the star sensor is in an attitude measurement mode, entering a step 3; otherwise, switching to an attitude measurement mode, and entering the step 3; step 3, calculating an attitude difference xk between each star sensor and the optical navigation sensor, wherein k is the serial number of the star sensor; 4, obtaining a calibration attitude difference yk of each star sensor by adopting a calibration algorithm; step 5, when the calibration attitude difference yk of the star sensor completes calibration, ending the attitude difference calibration work of the star sensor and the optical navigation sensor; otherwise, continuing to perform attitude difference calibration on the star sensor. According to the invention, error sources such as installation measurement errors and thermal deformation errors areavoided, and the in-orbit alignment precision of the optical navigation sensor is improved.

An image processing apparatus that can obtain a high-definition image by reducing an alignment mistake of a plurality of images. The image processing apparatus includes an alignment unit that performs sequential alignment that aligns adjacent images and reference alignment that aligns images other than a reference image to the reference image, and a control unit that controls the alignment unit to align a plurality of images that include a same object and are continuously picked up by an image pickup unit in time series by combining the sequential alignment and the reference alignment.