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2820 results about "Middle line" patented technology

There is two ways to find the midpoint of the line. One is object snap in the middle of line will show triangle it is the middle. Second choose object to draw or put to to the middle of the line then hold Control and click right click of mouse choose the mid Between 2 points it will go to the midpoint of the line .

Apparatus and methods for determining critical area of semiconductor design data

Disclosed are mechanisms for efficiently and accurately calculating critical area. In general terms, a method of determining a critical area for a semiconductor design layout is disclosed. The critical area is utilizable to predict yield of a semiconductor device fabricated from such layout. A semiconductor design layout having a plurality of features is first provided. The features have a plurality of polygon shapes which include nonrectangular polygon shapes. Each feature shape has at least one attribute or artifact, such as a vertex or edge. A probability of fail function is calculated based on at least a distance between two feature shape attributes or artifacts. By way of example implementations, a distance between two neighboring feature edges (or vertices) or a distance between two feature edges (or vertices) of the same feature is first determined and then used to calculate the probability of fail function. In a specific aspect, the distances are first used to determine midlines between neighboring features or midlines within a same feature shape, and the midlines are then used to determine the probability of fail function. A critical area of the design layout is then determined based on the determined probability of fail function. In specific implementations, the defect type is a short type defect or an open type defect. In a preferred implementation, the features may have any suitable polygonal shape, as is typical in a design layout.
Owner:KLA TENCOR TECH CORP

High-speed scanning and overall imaging three-dimensional (3D) measurement method

InactiveCN102589476AFast measurementLittle effect on reflectivityUsing optical meansThree dimensional measurementPrism
The invention relates to a visual inspection technology. In order to meet the requirements of fast and high-accurate surface three-dimensional (3D) topography online measurement and the detection requirements of a production line on intelligence, fastness, high accuracy and low cost, the invention adopts the technical scheme that: a high-speed scanning and overall imaging 3D measurement method comprises the following steps of: carrying out external modulation on a driving power supply by using a laser so as to control the output of a word line laser; rotating a multifaceted prism under the drive of a high-speed motor, wherein line-structured light outputted by the laser is reflected and projected to the surface of a measured object by the multifaceted prism; and placing a photoelectric detector at a position which is the limit position projected by the line-structured light during the rotating process of the multifaceted prism, carrying out exposure on an area-array CCD (Charge-Coupled Device) camera during the process that the line-structured light scans the whole area, and establishing a measurement model, wherein the 3D coordinate (xp, yp, zp) of the surface feature point of the measured object is obtained according to a formula by using an image coordinate (u[theta]p, v[theta]p) formed by the area-array CCD camera and [theta]p. The high-speed scanning and overall imaging 3D measurement method is mainly applied to the fast and high-accurate surface 3D topography online measurement.
Owner:TIANJIN UNIV

Vibration-type measurement pickup for measuring media flowing in two medium-lines, and inline measuring device having such a pickup

ActiveUS7127952B2Improved zero stabilityManufactured comparatively cost-favorablyVolume variation compensation/correction apparatusDirect mass flowmetersLine tubingMeasurement device
A measurement pickup includes at least four measuring tubes for conveying media to be measured. Each measuring tube has a first in- / outlet end and a second in- / outlet end. During operation, the measuring tubes vibrate, at least at times, especially simultaneously. The measurement pickup further includes an electromechanical exciter mechanism causing the measuring tube to vibrate, as well as a sensor arrangement reacting at least to local vibrations of the measuring tubes for producing at least one measurement signal influenced by vibrations of the measuring tubes. Of the at least four measuring tubes, two measuring tubes are, at least at times, inserted into the course of a first medium-line such that each of these two measuring tubes simultaneously conveys, in each case, a partial volume of a medium flowing through the first medium line, and two other measuring tubes of the at least four measuring tubes are, at least at times, inserted into the course of a second medium line such that each of these two measuring tubes simultaneous conveys, in each case, a partial volume of a second medium flowing through the second medium line. The measurement pickup can thus, on the one hand, have two media flowing through it, which differ measurably from one another in at least one physical property, for example mass flow rate, medium density and / or medium temperature, while having, on the other hand, despite the different media, a good zero-point stability.
Owner:ENDRESS HAUSER FLOWTEC AG

Tunnel back-break detection method based on laser-point cloud

The invention discloses a tunnel back-break detection method. The method includes the following steps that S1, according to center line data of a tunnel line, the thickness value and width value of a section are set, and tunnel section point cloud automatic partitioning is carried out; S2, the partitioned section point cloud is projected to the XOY plane, and a convex hull extraction method is adopted for carrying out automatic extraction of a section point cloud contour lines to obtain a measured section line; and S3, the tunnel design section is utilized, the distances between feature points of the tunnel design section and the measured section line and the locations of the feature points are calculated, and back-break automatic detection is carried out. Tunnel back-break detection is carried out by utilizing three-dimensional laser-point cloud data, and rapid partitioning of the section point cloud is achieved by adopting radius searching and a rectangular partitioning algorithm; on the basis of back-break area statistics of a polygonal intersection algorithm, the method is suitable for back-break detection of various types of tunnels; and compared with a traditional total-station section measurement mode, the detection efficiency is high, results are comprehensive and full and accurate, and the measurement precision meets the back-break detection requirement.
Owner:CHINA RAILWAY DESIGN GRP CO LTD

Multi-point pushing cumulative-gliding construction method for steel roof truss

The invention provides a multipoint incremental launching accumulative sliding construction method for steel roof truss. First, a slide support system of three chutes and six rails is set up; a high altitude assembly platform is set up beside the main structure; and a temporary support jig of the middle chute is set up along the midline of the main structure, using the concrete trough beam as the side chute. Then steel truss components are assembled on the ground, and are hoisted to the high altitude assembly platform to assemble a first sliding unit, and then the first sliding unit is connected with a hydraulic synchronous multipoint incremental launching mechanism; the hydraulic synchronous multipoint incremental launching mechanism consists of eight hydraulic crawl devices, three hydraulic pump stations and a synchronous incremental launching control system; after the first sliding unit is pushed, a second sliding unit is assembled and connected with the first sliding unit, and then a second time sliding is performed. Via such an assembly structure, the sliding movement is performed for n times, and then the backout bracket is unloaded, the high altitude assembly platform and the temporary support jig of the middle chute are dismounted. The invention solves the difficulty of safe and stable installation and emplacement in synchronous sliding of the steel roof truss, and at the same time reduces the engineering cost and shortens the construction period without affecting the construction of other structures.
Owner:BEIJING URBAN CONSTR GROUP +1

Testing method for laying ballastless tracks in early stage before overall completion of super long tunnel

ActiveCN102174893ASmall penetration errorImprove construction measurement accuracyHeight/levelling measurementTunnelsMathematical modelCurve fitting
The invention relates to a testing method for laying ballastless tracks in the early stage before overall completion of a super long tunnel. In the traditional tunnel construction method, a tunnel is dug in two directions both from the left cave and the right cave; and tracks are laid after the tunnel is finished; and the traditional construction method has the disadvantages of low construction progress, long construction period, low efficiency and risks of potential safety hazards. In the invention, multiple inclined shafts are arranged along the direction of a main cave; with the inclined shafts as a boundaries, the main cave construction is carried out in two directions by sections and the ballastless tracks are laid before the cave is dug through; a horizontal control network and a vertical control network are established to carry out measurement and data acquisition, the mathematical model of curve fitting is used to carry out centerline fitting so as to confirm the deviation between a through centerline and a theoretical centerline and carry out assessment to determine theoretical position of the centerline of sections dug through latterly; tracks of the through sections arelaid according to the fitted centerline, the sections under construction are measured and guided according to the fitted centerline to ensure that the centerline of the sections dug through latterly is consistent to the centerline of the sections with tracks laid. The method greatly accelerates construction progress and ensures smoothness and collinearity of the tracks laid in the early stage.
Owner:CHINA RAILWAY FIRST SURVEY & DESIGN INST GRP
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