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338results about How to "Reduce alignment time" patented technology
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Initial alignment method of speedometer-assisted strapdown inertial navigation system during running
ActiveCN103743414AImprove adaptabilityReduce preparation timeMeasurement devicesComputer graphics (images)Computer vision
The invention discloses an initial alignment method of a speedometer-assisted strapdown inertial navigation system during running. The method comprises coarse alignment and fine alignment. The method disclosed by the invention can effectively solve the problem of initial alignment of a vehicle during running. High-precision alignment can be quickly realized by the strapdown inertial navigation system under the help of the speedometer without special movements or stop of the vehicle or external assistant information such as road signs.
Owner:SOUTHEAST UNIV
SINS/GPS/polarized light combination navigation system modeling and dynamic pedestal initial aligning method
ActiveCN103217159AImprove estimation accuracyHigh degree of autonomyNavigational calculation instrumentsAviationSimulation
The invention provides a SINS / GPS / polarized light combination navigation system modeling and a dynamic pedestal initial aligning method, which relates to the dynamic pedestal initial aligning method for vehicle, ship and aviation aircraft. The invention concretely comprises the following steps: (1) establishing a SINS error equation as an initial aligning state equation; (2) according to a polarization azimuth, a GPS outputted speed and a position, establishing an initial aligning measurement equation base on the polarization azimuth error, a speed error and a position error; (3) estimating an attitude error, a speed error and a position error using a Kalman filtering; (4) correcting the feedbacks of the attitude, the speed and the position of SINS. The SINS outputs the attitude, the speed and the position information of the carrier to users. The invention has the advantages of high precision, small computational complexity and good anti-interference capability, and is used for improving the aligning precisions of vehicle, ship and aviation aircraft, with reduced initial aligning time.
Owner:BEIHANG UNIV
INS/GNSS/polarization/geomagnetism combined navigation alignment method based on Kalman filtering
ActiveCN109556632AGood autonomyReduce power consumptionNavigation by speed/acceleration measurementsNavigation systemInertial navigation system
The invention relates to an INS (Inertial Navigation System) / GNSS (Global Navigation Satellite System) / polarization / geomagnetism combined navigation alignment method based on Kalman filtering. The method comprises the following steps: selecting an initial aligned state variable, and establishing an error equation of a combined navigation system; performing matching and fusing to establish a polarization measuring equation according to a polarization azimuth angle output by a polarization sensor and an azimuth angle output by the INS; establishing a geomagnetism measuring equation according toa heading angle output by a magnetometer and the heading angle output by the INS; performing matching and fusing to establish an error measuring equation according to a speed and position informationoutput by the GNSS, the speed and the position information output by the INS; establishing a unified measuring equation for the combined navigation system by utilizing an augmented reality technology;designing a Kalman filter to estimate physical quantities such as a misalignment angle, a speed error, a position error, etc., of the combined navigation system; and performing feedback correction onan attitude, the speed and the position of the combined navigation system to improve the initial alignment estimation precision. The method has the advantages of being high in precision, small in calculation amount and high in compatibility, and the initial alignment time is reduced.
Owner:NORTH CHINA UNIVERSITY OF TECHNOLOGY
SINS dynamic base transfer alignment method based on satellite positioning
ActiveCN101750066AThe difficulty of avoiding ambiguityHigh precisionNavigation by speed/acceleration measurementsKaiman filterFault tolerance
A SINS dynamic base transfer alignment method based on satellite positioning includes the following steps: (1) the baseline vector direction of the GPS dual-antenna is in accordance with the navigation direction of the SINS, wherein one antenna is positioned at a carrier and the other antenna is positioned at the sub-carrier of the SINS, a GPS dual-antenna Doppler observational equation is used to establish the observational equation of SINS dynamic base transfer alignment method, and the position and speed information received by the GPS receiver are used as the position and speed of the initial state SINS; (2) an attitude error equation and an speed error equation of the SINS are established and used as the error state equation of the alignment method; (3) a kalman filter is adopted for attitude error and speed error estimation; (4) the feedback correction on attitude and speed are carried out for the SINS, and the SINS output the attitude and speed information of the carrier to the user. The SINS dynamic base transfer alignment method based on satellite positioning has high processing speed, high accuracy, small computation quantity, strong fault tolerance and is not affected by the deflection deformation of the carrier.
Owner:NAT UNIV OF DEFENSE TECH
Exposure method, exposure apparatus, and method of manufacturing device
InactiveUS20130148123A1Improve throughputReduce alignment timePhotomechanical apparatusUsing optical meansMagnificationComputer science
Owner:CANON KK
Coupling aligning device for waveguide chip and photo-diode (PD) array and aligning method applying coupling aligning device
InactiveCN102866471ACoupling and alignment are simpleEasy to operateCoupling light guidesAutomatic controlLight spot
The invention provides a coupling aligning method for a waveguide chip and a photo-diode (PD) array. An infrared light source is adopted for lighting, so that the PD array is clearly imaged in a monitoring instrument through an infrared charge coupled device (CCD); a fine adjustment frame is adjusted to control the heights and the horizontal positions of the waveguide chip and the PD array, so that a light spot reflected by the waveguide chip perpendicularly drops on a PD photosensitive surface, and further high-efficiency coupling is achieved, or a driving module is connected with a computer to automatically adjust a six-dimensional fine adjustment frame; the computer acquires infrared CCD image information through a data acquisition card; automatic control software processes an image to obtain a light spot array reflected by the waveguide chip and a slope and a position difference of a PD photosensitive surface array; the automatic control software controls an axial direction adjusted to the six-dimensional fine adjustment frame, so that the light spot array is superposed with the PD photosensitive surface array. The invention also provides a coupling aligning device for the waveguide chip and the PD array. By the method and the device, the alignment time of the waveguide chip and the PD array can be shortened, and the alignment efficiency and the repetitiveness are improved, so that the consistency of a product is guaranteed.
Owner:GUANGXUN SCI & TECH WUHAN
Transmission line automatic jacking alignment platform device and automatic alignment method thereof
InactiveCN104209750AReduce alignment timeImprove alignment accuracyMetal working apparatusTransmission lineImage sensing
A transmission line automatic jacking alignment platform device and an automatic alignment method thereof are suitable for carrying out alignment on a first workpiece and a second workpiece. The transmission line automatic jacking alignment platform device comprises a transmission unit, a jacking carrier unit, a lifting pressing combining unit and an automatic alignment unit. The jacking carrier unit comprises a moving carrying table which can bear the first workpiece and a jacking mechanism which can push the moving carrying table. The lifting pressing combining unit comprises a frame body and a rotating carrying table which can bear the second workpiece. The automatic alignment unit comprises an image sensing module arranged on the frame body and a laser sensing module. The image sensing module and the laser sensing module can sense the included angle and the offset amount between the first workpiece and the second workpiece and then control the rotating carrying table and the moving carrying table, and the first workpiece and the second workpiece are aligned with each other. The automatic alignment method is suitable for the transmission line automatic jacking alignment platform device.
Owner:AISIDI OPTICAL TECH SUZHOU
Liquid crystal display and substrate
The invention discloses a liquid crystal display and a substrate. The invention aims at solving the problem that the substrate positioning of the existing products with substrates, particularly the liquid crystal display, requires long time. The liquid crystal display comprises an array substrate and a color film substrate, wherein the array substrate and the color film substrate are both provided with combination type positioning marks, each combination type positioning mark comprises a rough positioning mark and a fine positioning mark, and the fine positioning mark is located on the peripheral area of the rough positioning mark; the rough positioning mark of the array substrate corresponds to the rough positioning mark of the color film substrate; and the fine positioning mark of the array substrate corresponds to the fine positioning mark of the color film substrate. The invention can be applied to products related to substrate positioning, in particular to the liquid crystal display.
Owner:BOE TECH GRP CO LTD +1
Digital holographic stamped anti-counterfeiting packing bag and production method thereof
ActiveCN103922018ARealize integrationHigh number of security featuresDuplicating/marking methodsBagsHot stampingInformation layer
The invention belongs to the technical field of anti-counterfeiting materials and particularly relates to a digital holographic stamped anti-counterfeiting packing bag and a production method thereof. The digital holographic stamped anti-counterfeiting packing bag comprises a packing bag body and anodized aluminum; the anodized aluminum is composed of a base layer, a transfer layer and a gum layer; the transfer layer is composed of a release layer, an information layer and an aluminized layer. The anodized aluminum is printed on the packaging bag body by hot stamping. The production method includes selecting materials, designing, making a plate and die-pressing, aluminizing, printing and partially aluminizing, coating with a printed layer, tagging, applying gum, gilding, and cutting and hot-sealing. The digital holographic stamped anti-counterfeiting packing bag and the production method thereof have the advantages that holographic anti-counterfeiting packing, print anti-counterfeiting packing and digital anti-counterfeiting packaging are integrated by means of the bidirectional-positioning hot stamping technique, various anti-counterfeiting features are applied to the packing bag according to needs of customers and features of the packing bag, the single anti-counterfeiting means of the original packing bag is broken, unachievable untransferability of anti-counterfeiting labels is achieved, and secondary use of anti-counterfeiting contents is avoided.
Owner:SHANDONG TAIBAO PREVENTING COUNTERFEIT
Stage equipped with alignment function, processing apparatus having the stage equipped with alignment function, and method of aligning substrate
InactiveUS20110062641A1High precision alignmentReduce alignment timeConveyorsSemiconductor/solid-state device manufacturingEngineeringGas supply
There is provided an inexpensive stage which is equipped with an alignment function and is capable of easily performing high-accuracy alignment especially in a θ direction even in case an object to be processed is large in weight. The stage equipped with an alignment function has a stage main body for holding a substrate while leaving a processing surface thereof open to access. The stage is provided with: a suction means capable of sucking that surface of the substrate which lies opposite to the processing surface; a gas supply means for supplying a gas to such a region of the substrate as is other than a portion sucked by the suction means; and a drive means to give a rotating force to the suction means so that the substrate can be rotated on the same plane by causing the suction means to serve as the center of rotation.
Owner:ULVAC INC
Alignment method and apparatus for array type optical probe scanning IC photoetching system
InactiveCN1333554AQuality assuranceSolve the problem of low yieldSemi-permeable membranesPhotomechanical apparatusGraphicsServo actuator
Firstly, according to the defined key points of circuit pattern, coding distinctive characteristics of circuit pattern, etching them on the silicon wafer, setting a pair a calibrating pattern, makingt he calibrating pattern position at circuit pattern place, and the calibrating pattern is formed from calibrating subpatterns. According to the key points of pattern, on the silicon wafer etching calibrating subpattern, when the alignment is made to key point of pattern, fetching calibrating subpattern coordinate and making comparison of said coordinate with recorded coordinate of calibrating subpattern. In the inveneted equipment the working table is placed on the base seat, and driven by precision servo-actuator, the silicon wafer to be worked can be fixed on the working table by means of suction cup, calibrating optical head and optical probe array are positioned over silicon wafer, a pair of calibrating optical heads is positioned in the middle of optical probe array are positioned over silicon wafer, a pair of calibrating optical heads is positioned in the middle of optical probes, the optcial probes array is arranged in the rectangular form. Said invention can save alignment time of pattern and can raise alignmant efficiency.
Owner:TSINGHUA UNIV
Omni-directional launch control method and device for carrier rocket as well as computer equipment
ActiveCN110304270AAchieve full range launch controlImprove quick response abilityLaunch systemsCosmonautic partsQuaternionLaunch control
The invention is applicable to the technical field of rocket control, and provides an omni-directional launch control method and device for a carrier rocket as well as computer equipment and a storagemedium. The method comprises the following steps that an initial attitude angle is acquired, moreover, an initial quaternion is calculated, wherein the initial attitude angle comprises an initial rolling angle; a real-time angle increment of the current control period is acquired, and the real-time quaternion is calculated; a standard quaternion is calculated according to the initial rolling angle; an attitude angle deviation is calculated on the basis of the real-time quaternion and the standard quaternion, and a target attitude control signal is obtained according to the attitude angle deviation and is output to an execution mechanism. The initial quaternion is calculated through the initial attitude angle to obtain the standard quaternion and the real-time quaternion, the attitude angle deviation is obtained through calculation and is resolved to obtain the target attitude control signal for controlling the rocket, omni-directional launch control of the rocket is realized without rotating an indexing mechanism, the indexing mechanism is omitted, so that the cost is saved, the time for rotating the rocket for alignment is shortened, and the rapid response capability and the automatic level of the rocket are improved.
Owner:宁波天擎航天科技有限公司
Panda type polarization maintaining fiber side looking shaft alignment device and panda type polarization maintaining fiber side looking shaft alignment method
InactiveCN103592722ASimple structureLow costCoupling light guidesPolarization-maintaining optical fiberEngineering
The invention discloses a panda type polarization maintaining fiber side looking shaft alignment device and a panda type polarization maintaining fiber side looking shaft alignment method. Side looking images of two fibers are acquired through an imaging microscope, a central position of the fibers and the largest light intensity position are found out by utilizing a digital image processing method, an absolute difference of the values at two positions is acquired, a relation curve of the absolute difference and a turning angle can be acquired by synchronously turning the two fibers for multiple times, secondary fitting on multiple points near the largest value point of the curve is carried out to acquire characteristic angles, characteristic angle difference of the two fibers is calculated, so a stress shaft deviation angle of the two fibers is acquired, one fiber is turned to acquire a needed stress shaft deviation angle, and thereby shaft alignment of the polarization maintaining fibers is realized. The method and the device which are mainly applied to the panda type polarization maintaining fibers can realize shaft alignment of various types of panda type polarization maintaining fibers, has advantages of high shaft alignment precision, good shaft alignment repeatability, short shaft alignment time, high shaft alignment efficiency and realized automation shaft alignment and can be used for detecting a welding angle after welding of a fiber.
Owner:ZHEJIANG UNIV
Alignment method of an underwater large misalignment angle based on SINS (Strapdown Inertial Navigation System)/DVL (Doppler Velocity Log) of SRQKF (Square-root Quadrature Kalman Filter)
ActiveCN105806363AImprove alignment accuracyReliable Attitude InformationMeasurement devicesGauss–Hermite quadratureSquare root filtering
The invention discloses an alignment method of an underwater large misalignment angle based on SINS (Strapdown Inertial Navigation System) / DVL (Doppler Velocity Log) of SRQKF (Square-root Quadrature Kalman Filter). The alignment method comprises the following steps: step 1: establishing a nonlinear error model and a nonlinear filtering equation of the SINS under the large misalignment angle; step 2: constructing the SRQKF by utilizing a multivariate Gauss point and coefficient configuration method and a square-root filtering method in Gauss-Hermite quadrature; and step 3: estimating the misalignment angle by utilizing the SRQKF, and correcting a strapdown attitude matrix, thus obtaining accurate strapdown attitude matrix and attitude angle. The alignment method disclosed by the invention has the advantage that the underwater alignment accuracy and alignment speed of the carrier strapdown system are improved.
Owner:SOUTHEAST UNIV
Initial alignment method suitable for rocking base
InactiveCN103017787AReduce alignment timeImprove environmental adaptabilityNavigation by speed/acceleration measurementsThree axis accelerometerDigital filter
The invention provides an initial alignment method suitable for a rocking base. The method comprises the following steps: synchronously collecting the angular rate information of a three-axis gyro and the specific force information of a three-axis accelerometer at real time when a base is influenced by rocking interference; carrying out coarse alignment; obtaining the transformation relationship between a carrier coordinate system and a semi-fixed coordinate system according to the navigation, horizontal rocking and transverse rocking information input by an inertial navigator; projecting the acceleration information in the carrier coordinate system onto the three axis of the semi-fixed coordinate system, and carrying out integration; processing signals by a high-pass digital filter; selecting the extracted ship instantaneous linear movement speed information as the speed reference, reducing the extracted speed by a speed calculated by the inertial navigator to obtain the difference, and building a state equation and a measurement equation of a Kalman filter by taking the difference as the measurement value of the Kalman filter; and discretizing the Kalman filter to complete alignment. The initial alignment method provided by the invention has the advantages of shorter alignment time, higher alignment precision, and higher environment adaptability in comparison with an alignment method using position error as the measurement value.
Owner:HARBIN ENG UNIV
Micro-domain laser probe component analyzer based on optical fiber waveguide
ActiveCN103512868AReduce complexityImprove coaxialityAnalysis by material excitationDelayed pulseBeam expander
The invention discloses a micro-domain laser probe component analyzer based on optical fiber waveguide. The analyzer comprises a Nd:YAG laser, a wavelength-tunable laser, a CCD monitoring camera, a computer, a grating spectrometer, a focusing objective lens, a displacement platform, a digital delay pulse generator, and an enhanced CCD. The focusing lens is a reflective focusing lens. The Nd:YAG laser and the wavelength-tunable laser both adopt optical fiber waveguide for carrying out laser pulse transmission; laser pulse is collimated by using an optical fiber collimator and expanded by a beam expander, and enters the focusing objective lens. Laser pulse transmitted by the Nd:YAG laser burns a surface micro-domain on a sample to be analyzed, such that plasma is formed; the laser pulse transmitted by the wavelength-tunable laser is applied on the plasma, such that resonance excitation is caused; one end of the optical fiber is used for collecting spectral signal transmitted by the plasma, and the other end is connected with an optical fiber interface of the grating spectrometer. According to the invention, precise qualitative and quantitative analysis of laser probe upon substance micro-domain components can be realized.
Owner:HUAZHONG UNIV OF SCI & TECH
Method for detecting the center of wafer and storage medium storing a program for executing the method
InactiveUS20080068618A1Shortening wafer alignment timeReduce exerciseSemiconductor/solid-state device testing/measurementSemiconductor/solid-state device manufacturingComputer science
A method detects a center of a wafer having a notch when aligning the wafer mounted on a movable mounting table. The method includes capturing an image of the wafer by using an imaging unit, the image including the notch; extracting an edge line from the image of the wafer; detecting a shape of the notch from the edge line; and calculating the center of the wafer based on the shape of the notch.
Owner:TOKYO ELECTRON LTD
Alignment method of INS/GNSS/polarization/geomagnetic integrated navigation system based on least squares
ActiveCN109556631AGood autonomyReduce power consumptionNavigation by speed/acceleration measurementsState variableNavigation system
The invention relates to an alignment method of an INS / GNSS / polarization / geomagnetic integrated navigation system based on the least squares. The method comprises the following steps: selecting an initial aligned state variable; establishing a polarization measurement equation according to the match and fusion of a polarization azimuth angle which is output by a polarization sensor and an azimuthangle which is output by the INS; establishing a geomagnetic measurement equation according to heading angles which are respectively output by a magnetometer and the INS; establishing an error measurement equation according to the match and fusion of the velocity and position information which are output by the GNSS and the velocity and position information which are output by the INS; using the augmentation technology to establish a unified measurement equation of the INS / GNSS / polarization / geomagnetic integrated navigation system; using the least squares technique to estimate the physical quantities such as a misalignment angle, a velocity error, a position error and the like of the INS / GNSS / polarization / geomagnetic integrated navigation system; and performing feedback correction on the attitude, the velocity, and the position of INS / GNSS / polarization / geomagnetic integrated navigation system to improve the initial alignment estimation accuracy.
Owner:NORTH CHINA UNIVERSITY OF TECHNOLOGY
Alignment scanning method for alignment mark
ActiveCN102096347AReduce placementReduce the overall heightPhotomechanical treatmentGratingProcess module
The invention discloses an alignment scanning method for an alignment mark. The method comprises the following steps that: 1, an alignment operation and management module transmits scanning parameters to a signal acquisition and processing module and a position acquisition and motion control module; 2, the position acquisition and motion control module plans a motion track comprising a scanning track in the process of scanning various sub-gratings and a transition track connected with different scanning tracks according to the scanning parameters and performance indexes of a motion table, and reaches an agreement with the alignment operation and management module to finish synchronous negotiation; 3, the motion table takes place and moves under the control of the position acquisition and motion control module according to the planned motion track; 4, the position acquisition and motion control module acquires position information for alignment and transmits the information to the alignment operation and management module, the signal acquisition and processing module acquires light intensity signals and transmits the light intensity signals to the alignment operation and management module; and 5, the alignment operation and management module calculates an alignment position of the mark according to the light intensity signals of a plurality of marked sub-gratings and the position information.
Owner:SHANGHAI MICRO ELECTRONICS EQUIP (GRP) CO LTD
UKF (unscented Kalman filter)-based alignment method for inertia/polarized light integrated navigation system under large misalignment angle
ActiveCN110672131AHigh precisionHigh precision attitude correction capabilityMeasurement devicesComputational physicsState vector
The invention relates to a UKF (unscented Kalman filter) alignment method for an inertia / polarized light integrated navigation system under a large misalignment angle. According to the method, the state vectors of the initial alignment of the inertia / polarized light integrated navigation system are selected to build the nonlinear error state equation of the inertia / polarized light integrated navigation system under the large misalignment angle; a solar vector is calculated according to a polarization azimuth angle measured by a polarized light sensor, and a polarized light nonlinear measurement equation is established; a speed error measurement equation is established according to the speed output of an inertial navigation system; the unified nonlinear measurement equation of the inertia / polarized light integrated navigation system is established by using an augmentation technology; the nonlinear equation of the inertia / polarized light integrated navigation system is discretized; an unscented Kalman filter is designed to estimate the error states such as misalignment angle, speed error, gyroscopic drift and accelerometer constant bias of the inertia / polarized light integrated navigation system; feedback correction is carried out on the attitude and speed of the inertia / polarized light integrated navigation system, and the initial alignment estimation precision and speed of theinertia / polarized light integrated navigation system under the large misalignment angle are improved. The method has the advantages of high precision, high speed and high autonomy.
Owner:NORTH CHINA UNIVERSITY OF TECHNOLOGY
Container loading-unloading automatic flow-line
InactiveCN101070122AReduce distanceSimple counterpointStorage devicesLoading/unloadingElectric carsLoading unloading
A container loading and unloading automatic pipeline is to transfer the container to the stack field through the aerial conveyor electric car matched by the ring viaduct, the bulkhead bridge and the gantry crane with load and unload at two ends in the track field. Then the container is transfer to the changing platform from the stack field and next to install it to the collecting block. The pipeline has not only decreased the distance between the hanger and the container, decreased the inertia of the container, reached the container allocation in pipeline by the laser to improve the efficiency, save the energy and decrease the pollution but improved the work safety to reach the loading and unloading automatically.
Owner:SHANGHAI HAILEI LASER TECH
Levelling and horizontal error testing device
ActiveCN107462227AReduce alignment timeFast Optical Alignment SpeedActive open surveying meansArtificial horizonsEngineeringElectric control
The invention provides a levelling and horizontal error testing device which comprises a base, a granite surface plate, a levelling and aiming device, a transmission system and an electric control box. The levelling and aiming device comprises a photoelectric auto-collimator, a pentaprism, a silicone oil tray, a single-axial laser alignment device and a support, wherein the photoelectric auto-collimator is used for optical aiming of platform leveling errors, the pentaprism is used for bending and turning the measuring optical axis of the photoelectric auto-collimator at 90 degrees and then aims to a platform standard hexahedron, the silicone oil tray is used for zero correction of the photoelectric auto-collimator, the single-axial laser alignment device is used for accurate alignment of the optical axis of the auto-collimator, and the support is used for installing the photoelectric auto-collimator, the pentaprism, the silicone oil tray and the single-axial laser alignment device. The levelling and horizontal error testing device can achieve automatic alignment of the optical axis, meanwhile achieves automatic measurement of leveling errors and is high in testing efficiency and good in test data consistency.
Owner:BEIJING INST OF AEROSPACE CONTROL DEVICES
Quick initial alignment method for moving base of SINS (strapdown inertial navigation system) based on lie group description
ActiveCN110702143AAvoid nonlinearityReduce alignment timeNavigation by speed/acceleration measurementsGyroscopeQuaternion
The invention discloses a quick initial alignment method for a moving base of an SINS (strapdown inertial navigation system) based on lie group description. The method comprises the following steps: replacing traditional quaternion description with lie group description to realize calculation of SINS attitude transformation; establishing a linear initial alignment model by using a lie group differential equation; establishing an augmented initial alignment model by taking gyroscopic drift as an augmented state quantity; and then realizing synchronous estimation of an initial attitude matrix and gyroscope constant drift by adopting a matrix-form Kalman filtering algorithm. According to the quick initial alignment method, the gyroscope constant drift is taken as the augmented quantity, and compared with a traditional initial alignment model, a more accurate augmented linear alignment model is established. The alignment method disclosed by the invention can realize one-step direct alignment of the SINS, greatly shortens the alignment time, is convenient for compensating errors in a strapdown resolving process, effectively improves the alignment precision, and is more suitable for practical engineering application.
Owner:BEIJING UNIV OF TECH
Integrated aspheric optical coupler for RF planarized automatic photonics packaging
InactiveUS6965714B2Accurate and reliable alignment of opticalLower assembly costsLaser detailsCoupling light guidesFiberPhotovoltaic detectors
The invention relates to an optical, integrated alignment device for accurately aligning and efficiently coupling energy between in-plane optical devices. A semiconductor substrate is etched to include a groove for an optical fiber and a lens for passing an optical signal from a cut fiber to a photodetector. The etched semiconductor substrate may be used to pass an optical signal from a surface light emitting device to a cut fiber. The end of the optical fiber is cut at a slant that redirects an optical signal from the fiber through the lens or vice-versa. The lens focuses the optical signal onto a target.
Owner:NORTHROP GRUMMAN SYST CORP
Exposure method
ActiveUS20090111060A1Improve alignment accuracyShorten the timeServometer circuitsPhotomechanical exposure apparatusPhotolithographyElectrical and Electronics engineering
An exposure method suitable for a photolithography process is described. First, a wafer with a group of alignment marks formed thereon is provided. A first alignment step is conducted by using the group of the alignment marks on the wafer to obtain a first calibration data. Next, a second alignment step is conducted by using a portion of the group of alignment marks on the wafer to obtain a second calibration data. The first calibration data is then compared with the second calibration data to obtain a comparison result. Next, a photoresist exposure step is conducted on the wafer according to the comparison result.
Owner:NAN YA TECH
SINS large-azimuth misalignment angle initial alignment method based on self-adaptation UPF
InactiveCN105004351AOvercoming degeneracyImprove initial alignment accuracyMeasurement devicesEngineeringComputer vision
The invention discloses an SINS large-azimuth misalignment angle initial alignment method based on a self-adaptation UPF. The method includes the following steps that 1, an SINS non-linear error model is built; a misalignment angle between an ideal navigation coordinate system and a computed navigation coordinate system is presented by means of an Euler platform error angle, and the corresponding SINS non-linear error model is built according to the rotation sequence of the error angle. The method reduces influences caused by system simplification and noise statistic feature uncertainty on a system to some extent. Meanwhile, the UPF middle particle degradation phenomenon is well eliminated. Initial alignment precision of a strap-down inertial navigation system is improved, and alignment time is shortened. The method is a software method, system hardware does not need to be modified, and accordingly the method is convenient and feasible to practically implement.
Owner:SOUTHEAST UNIV
Jig and carrier plate used for attaching circuit board strength reinforcing pieces
ActiveCN103957666AImprove qualityReduce alignment timePrinted circuit manufactureEngineeringMechanical engineering
Owner:SHANGHAI MEADVILLE ELECTRONICS
Liquid crystal display and substrate thereof
A liquid crystal display, comprising an array substrate and a color filter substrate, wherein a combination type mark is disposed on both of the array substrate and the color filter substrate, and the combination type mark comprises a rough mark and a fine mark that is located around the rough mark; and wherein the rough mark on the array substrate corresponds to the rough mark on the color filter substrate, and the fine mark on the array substrate corresponds to the fine mark on the color filter substrate.
Owner:BEIJING BOE OPTOELECTRONCIS TECH CO LTD +1
Steel plate splicing device
InactiveCN108907549AReduce alignment timeTime, improve alignment efficiency and improveWelding/cutting auxillary devicesAuxillary welding devicesEngineeringSteel plates
The invention discloses a steel plate splicing device. The steel plate splicing device comprises a workbench, two guide rails, a crossbeam, a compaction mechanism, a welding mechanism and copper pad bases, wherein the two guide rails are arranged on the workbench in parallel, and the distance between the guide rails can be adjusted according to the sizes of steel plates to be welded; sliding basescorrespondingly matched with the guide rails are arranged at the two ends of the crossbeam; the compaction mechanism is fixed on the crossbeam and used for positioning the steel plates to be welded at the welding butt positions; guide sliding rails are arranged on the upper surface of the crossbeam, and the welding mechanism is arranged on the guide sliding rails in a sliding manner; the copper pad bases are fixed on the workbench and correspond to welded joint positions of the steel plates to be welded. The steel plate splicing device can improve the splicing efficiency of the steel plates and guarantees the quality of welded joints.
Owner:重庆大江智防特种装备有限公司
Tunable optical network unit for multi-wavelength passive optical network system and operating method thereof
InactiveUS20160020868A1Reducing upstream signal wavelength alignment timeReduce alignment timeWavelength-division multiplex systemsStar-type electromagnetic networksPhotovoltaic detectorsPhotodetector
A tunable optical network unit (ONU) for a multi-wavelength passive optical network (MW PON) system and an operation method thereof are provided. The tunable ONU includes a cyclic tunable filter configured to have cyclic wavelength transmission properties that allow all wavelength channels of both a downstream signal and an upstream signal and to vary a wavelength to pass therethrough; a wavelength splitter configured to split an upstream signal wavelength band and a downstream signal wavelength band; a photodetector element configured to detect a downstream signal that is transmitted through the wavelength splitter, passing through the cyclic tunable filter which is aligned to a specific downstream signal wavelength channel; and a tunable transmitter configured to output to the wavelength transmitter an upstream signal of a wavelength channel that is determined based on an aligned downstream signal wavelength channel of the cyclic tunable filter.
Owner:ELECTRONICS & TELECOMM RES INST
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