338results about How to "Reduce alignment time" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

The invention discloses a jig and carrier plate used for attaching circuit board strength reinforcing pieces. The jig used for attaching the circuit board strength reinforcing pieces is characterized by comprising a bottom plate and a cover plate. The bottom plate is provided with an upper surface used for supporting a circuit board. The cover plate is matched with the bottom plate and used for clamping the circuit board placed on the upper surface. The cover plate is provided with at least one first through hole. The first through holes make the circuit board be exposed partially. According to the jig used for attaching the circuit board strength reinforcing pieces, the bottom plate is adopted for supporting the circuit board, the circuit board is covered by the cover plate, and a region, to be reinforced, of the circuit board is exposed through the first through hole in the cover plate, and then the strength reinforcing pieces are embedded into the first through holes to be attached to the circuit board. Due to the fact that the cover plate has a certain thickness, an operator can accurately embed the strength reinforcing pieces into the first through holes and pasting the strength reinforcing pieces to be region to be reinforced, pasting precision is greatly improved, meanwhile, time for alignment through the naked eyes is shortened, and working efficiency is improved.

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.

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.