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517 results about "Mutual position" patented technology

Method and device for realizing augmented reality

The invention provides a method and a device for realizing augmented reality. The method comprises the following steps of obtaining a real scene, and obtaining interest points in a preset range and corresponding interest point information according to a camera site and a viewing direction of the real scene; establishing a virtual plane, mapping the obtained interest points on the virtual plane according to a mutual position relation among the interest points, and adding corresponding interest point information labels at positions, at which the interest points are mapped; forming an augmented reality view by overlaying the virtual plane, to which the interest point information labels are added, in the real scene, wherein the virtual plane is in parallel to a horizontal plane in the real scene based on visual sense; outputting and showing the augmented reality view, and adjusting the virtual plane according to real-time information of the real scene to enable that the virtual plane always is in parallel to the horizontal plane in the real scene based on the visual sense. According to the method and the device for realizing the augmented reality, the distance relation among the interest points and the mutual position relation between the interest points and the users can be more intuitively shown for the users.
Owner:TENCENT TECH (SHENZHEN) CO LTD

Coarse alignment method for fiber optic gyro strapdown inertial navigation system based on single axis rotation

InactiveCN101629826AImproved Coarse Alignment AccuracyNavigation by speed/acceleration measurementsFiberAccelerometer
The invention provides a coarse alignment method for a fiber optic gyro strapdown inertial navigation system based on single axis rotation. The coarse alignment method comprises the following steps: (1) determining initial position parameters of a carrier by a GPS; (2) collecting the data output by a fiber optic gyroscope and a quartz accelerometer and processing the data; (3) determining a transfer matrix Ti<n> of a navigation coordinate system and an inertial coordinate system according to the mutual position relation of the coordinate systems; (4) allowing a single axis of an inertial measurement unit to continuously rotate, setting superposition of an initial time IMU coordinate system s and a carrier coordinates b, then allowing the inertial measurement unit to continuously rotate around a positive direction of an azimuth axis ozb of the carrier coordinate system with an angular velocity Omega=6 degrees/s; (5) determining the relative position relation of the inertial coordinate system and a base inertial coordinate system; and (6) determining an expression of a strapdown matrix after coarse alignment is over according to the calculated relative conversion relation of the coordinate systems calculated in step (3), (4) and (5). The coarse alignment method can help obtain higher coarse alignment precision under a swinging interference condition.
Owner:HARBIN ENG UNIV

Steel box girder assembling construction method

The invention provides a construction method for assembling steel box girders, which is used for the hoisting construction of the steel box girders during the road and bridge construction. The method comprises the steps as follows: a first steel box girder section is hoisted; a second steel box girder section is hoisted and suspended on the soleplate of the first steel box girder section; a connecting clamp plate is arranged at the top plate of the first steel box girder section and the second steel box girder section and is respectively suspended on top of the first steel box girder section and welded on the top of the second steel box girder section; hoisting equipment is removed; the mutual position of the steel box girder sections is adjusted and the steel box girder sections are welded to each other; the connecting clamp plate is removed; the temporary pier is removed; and the assembly is completed. As the residual assembly is adopted, the steel box girder construction under complex construction environment has large elasticity, thus ensuring the assembly precision and quality; the loading form is adopted to carry out the assembly of the steel box girder, thus solving the problem that the temporary pier is difficult to be arranged when the site is restricted; the construction time of hoisting equipment and the use of the temporary piers are reduced; and the whole assembly process is simple, feasible, safe, reliable, economical and reasonable.
Owner:GUANGZHOU MUNICIPAL ENG GROUP

Machining method of rolling bearing formed by whole and precise hard turning and molding of sleeve ring

The invention provides a machining method of a rolling bearing formed by whole and precise hard turning and molding of a sleeve ring. The machining method is characterized by comprising the following steps: after quenching and annealing heat treatment of the sleeve ring, carrying out the whole and precise hard turning and molding; and then combining and assembling a rolling body, wherein a sleeve ring rolling path comprises a fixed-curvature-groove-shape rolling path, a non-groove-shaped rolling path, a variable-curvature-shaped rolling path and a non-groove-shaped rolling path according to section shapes. The machining method disclosed by the invention overcomes the defects in the prior art that (1) performance defects on a machining surface, including grinding burn, a grinding metamorphic layer, grinding tensile stress, abrasive particle adhesion, scratches and the like, are caused by grinding and molding the sleeve ring; (2) shape defects on the machining surface that mutual position precision of all parts is not high, the shape of the rolling path cannot be accurately guaranteed and the like, are caused by carrying out a plurality of times of machining on different surfaces, even the same surface; (3) the defects that large investment of equipment, a tool clamp and personnel, and high machining cost are caused; and (4) the defects that a cutting solution needs to be used and the machining method is not environment-friendly enough are caused. The invention provides an anti-fatigue and green machining method which has the very great engineering actual meanings.
Owner:SHANGHAI F&S BEARING TECH

Device for measuring taper hole

The invention relates to a device for measuring a taper hole, which is composed of a base (2), a slide rod (5), a slide core (8), a contact (1) and a dial indicator (6), wherein the contact (1) is installed in a hole at the lower end of the slide rod (5) and the slide core (8) is installed in the slide rod (5); the dial indicator (6) is installed at the upper end of the slide rod (5) through an expansion ring (10); a locking screw (4) on the slide rod (5) is used for limiting a mutual position of the slide core (8) and the slide rod (5); the contact (1) is reliably contacted with the slide core (8) by springs (7 and 9) in the slide rod (5); the slide rod (5) is installed in the middle of the base (2) and the slide rod (5) can be observed from a window (3) on the side surface of the base (2); scales are arranged on the window (3) of the base and the slide rod, and a vernier depth gauge is formed by the base (2) and the slide rod (5). According to the device, the requirements on the measurement precision of the taper hole can be met and the requirements on an operator are not high; and the device provided by the invention can be used in a process after machining and a machining process, and has the characteristics of wide adaptability, convenience for manufacturing and the like.
Owner:CITIC DICASTAL

Method for laser powder-filled welding of aluminum/steel dissimilar metal joint without brazing flux

The invention discloses a method for laser powder-filled welding of an aluminum/steel dissimilar metal joint without a brazing flux, belonging to the technical field of high-power laser processing. The method comprises the following steps of: utilizing a laser powder-filled welding method and a synchronous powder feeding technique; enabling a joint arrangement form as follows: arranging an aluminum plate above a galvanized steel sheet and laying a layer of brazing material between two layers of plates; regulating the size of a laser spot and the size of a powder beam to be matched, and regulating the mutual position relationship of the powder beam and the laser spot so that a front half part is arranged in a back half part of the laser spot; and welding by optimal powder-filled welding process parameters so that an aluminum alloy and one side of the brazing material are molted and infiltrated with the galvanized steel sheet to form brazing connection on the premise of ensuring the galvanized steel sheet not to be melt. According to the method for the laser powder-filled welding of the aluminum/steel dissimilar metal joint without the brazing flux, disclosed by the invention, the brazing flux does not need to be used; added metal powders during welding can effectively increase the absorptivity of a workpiece on laser and the utilization rate of the laser; and in addition, the added powders can further effectively restrain heat cracks of the aluminum alloy during welding and improve the quality of the joint.
Owner:BEIJING UNIV OF TECH

Vehicle-road cooperation auxiliary driving method based on road surface grid system

The invention relates to a vehicle-road cooperation auxiliary driving method based on a road surface grid system; the method is characterized by comprising the following steps: A, dividing a road into grids in forwarding and lateral directions; B, arranging a plurality of groups of video monitoring devices on roadsides, wherein each group of monitoring devices are formed by a plurality of cameras, thus realizing visual field coverage in certain road section scope; C, monitoring vehicles in a visual field domination area in real time, determining vehicle occupied road grids, transmitting vehicle positions and grid occupation information between the plurality of monitoring devices in real time, and determining the vehicle positions and sizes according to the vehicle occupied road grids; D, transmitting the road surface grid information to a plurality of vehicles in real time, and combining with the vehicle auxiliary driving system so as to cooperatively determine mutual position relations and relative speed vectors of surrounding vehicles. The method can grid the existing road so as to provide a fixed coordinate system for vehicle real time positioning determination, and the grid occupied distribution conditions can serve as simplified indexes, thus providing high efficiency support for vehicle-road cooperation works.
Owner:SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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