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284 results about "Vertical deflection" patented technology

The vertical deflection (VD; also known as deflection of the plumb line and astro-geodetic deflection) at a point on the Earth is a measure of how far the gravity direction has been shifted by local anomalies such as nearby mountains. They are widely used in geodesy, for surveying networks and for geophysical purposes.

Three-dimensionally adjustable disconnectable curtain wall connecting device and construction method thereof

ActiveCN101956438ASolve the adjustmentSolve the different size of the board seamCovering/liningsWallsVertical deflectionKeel
The invention relates to a three-dimensionally adjustable disconnectable curtain wall connecting device. In the three-dimensionally adjustable disconnectable curtain wall connecting device, the section of a back pendant has a chair shape; a back bolt hole is formed at the back of the chair and is in threaded connection with an embedded nut at the back of each curtain wall plate through a back bolt; the back chair legs have L shapes and are propped against the back of each curtain wall plate; a jackscrew bolt hole is formed on the chair surface and is connected with an adjustable supporting piece of which the upper end is embedded between the front and back chair legs through a jackscrew bolt; the adjustable supporting piece is formed by connecting a supporting plate, a vertical plate and an adjusting plate to be a whole; the supporting plate is in top contact connection with the jackscrew bolt; the thread height of the jackscrew bolt is more than the longitudinally adjusting distance of each curtain wall plate; and a long round hole vertical to the wall body is formed on the adjusting plate. The device solves the problems that the position of each curtain wall plate cannot be adjusted, the plate gaps are different in sizes, the curtain wall plates are staggered with one another and the like so as to guarantee the appearance of the curtain wall and overcomes the defect that the installation of the traditional curtain wall plates completely depends on the control level and the vertical deflection of keels at the same time, so that the construction quality can be controlled easily.
Owner:泛华建设集团有限公司

Dynamic measuring device and method for plumb line deviation kept on basis of astronomical attitude reference

The invention discloses a dynamic measuring device and method for plumb line deviation kept on the basis of an astronomical attitude reference. An INS / GPS attitude measurement subsystem and an LGU / GPS attitude measurement subsystem are built, wherein an initial value adopted for attitude updating by the LGU / GPS attitude measurement subsystem is provided by attitude information output by a star sensor. The difference between the attitude output by the LGU / GPS attitude measurement subsystem and the attitude output by the INS / GPS attitude measurement subsystem is obtained, and further the plumb line deviation is calculated. Finally, jump errors in the measuring values of the plumb line deviation are finally corrected, and low frequency errors in the measuring values of the plumb line deviation are corrected by utilizing global gravity model data. The systems in the invention are simple; the method provided by the invention is strong in robustness, and the measuring results are stable; requirements to GPS accuracy are lowered; compared with a traditional vector airborne gravitometer which relies on high precision difference GPS, the dynamic measuring device provided by the invention only requires common GPS single point positioning to meet accuracy requirements. Therefore, the application scope of the measuring method is expanded.
Owner:NAT UNIV OF DEFENSE TECH

Efficient paint stirring equipment for building decoration

The invention discloses efficient paint stirring equipment for building decoration. The equipment comprises a bottom plate, a first connecting rod, a second connecting rod, a sliding sleeve, a rack, a first gear, a first rotating shaft, a stirring tube, a chute, a slide block, a first stirring rod, a second stirring rod, a universal rolling wheel, a spiral rail, a first belt wheel, a second belt wheel, a third rotating shaft, a second gear and a third gear. The efficient paint stirring equipment for building decoration is provided with the first connecting rod, the second connecting rod, the sliding sleeve, the rack and the first gear; through the matching of the components, the first stirring rod and the second stirring rod are driven to do positive and reverse rotation, so that the stirring efficiency is improved; the chute, the slide block, the universal rolling wheel and the spiral rail are installed; through the matching of the components, the first stirring rod and the second stirring rod realize the vertical deflection during the rotation; the stirring efficiency is improved; the first belt wheel, the belt, the second belt wheel, the third rotating shaft, the second gear and the third gear are installed, so that the rotating directions of the stirring tube and the first rotating shaft are opposite; and the stirring efficiency is improved.
Owner:王佳宝

Plumb line deviation dynamic measurement device and method based on combination of INS and GPS

The invention discloses a plumb line deviation dynamic measurement device and method based on combination of an INS and a GPS. The method comprises the steps that firstly, an INS/GPS attitude measurement subsystem and an LGU/GPS attitude measurement subsystem are built, and an attitude matrix output by the INS/GPS is utilized to initialize the LGU/GPS attitude measurement subsystem at the moment when measurement is started; secondly, the LGU/GPS and the INS/GPS are used for conducting attitude calculating respectively, and the difference between the attitude angle output by the LGU/GPS and the attitude angle output by the INS/GPS is calculated; finally, an optimal estimated value of plumb line deviation is obtained through a Kalman filtering method by the aid of a global gravity model by establishing an observation equation and a state equation for plumb line deviation measurement with the difference between the attitude angle output by the LGU/GPS and the attitude angle output by the INS/GPS as the observed quantity. The plumb line deviation dynamic measurement device and method based on combination of the INS and the GPS can effectively reduce the complexity and cost of a system, improve the measurement accuracy and reliability, and are independent of the measurement environment, high in operability and convenient to implement.
Owner:NAT UNIV OF DEFENSE TECH

Accurate and rapid calculation method for global and local ocean disturbing gravity

The invention discloses an accurate and rapid calculation method for global and local ocean disturbing gravity, which belongs to the technical field of geodetic surveying. The method is used for global ocean disturbing gravity calculation, FFT calculation is carried out on each latitude circle by supplementing observation data in a global area, and then summation calculation is carried out in a longitude direction, and the processing method ensures the consistency of the result after the FFT calculation and the result of the original analysis algorithm. With respect to local ocean disturbing gravity calculation, a kernel function forms a cyclic matrix by supplementing a certain amount of data in the kernel function and the observation data, and then the consistency of the result and the result of the original analysis algorithm is ensured by virtue of FFT calculation. According to the method disclosed by the invention, a calculation formula is provided for calculating disturbing gravity by virtue of ocean height measurement satellite data, and an accurate and rapid method is given simultaneously. The method disclosed by the invention can also be applied to resolution for most of integral problems in physical geodesy, for example, resolution for geoidal surface, the deviation of plumb line, terrain correction and the like.
Owner:西安测绘研究所

Sigma-springs for suspension systems

Sigma-spring can be used as a passive vehicle suspension system of built-in damping, a passive vehicle suspension system with hydraulic damper, a semi-active vehicle suspension system of two opposite Sigma-springs (10,11) of built-in damping, or a semi-active vehicle suspension system of two opposite Sigma-springs (10,11) penetrated at line of external loading by hydraulic damper (12). The Sigma-spring is a spring of a special Sigma-shape above which mass can be suspended vertically while under static or dynamic loading conditions. The outer two arms of the Sigma-shape of the spring are inclined such that to be horizontal while fully loaded ensuring safe compression pattern. The Sigma-shape has two opposite sets of turns of different sizes one of small radius of curvature at the side of line of the applied external load and the opposite one has large radius of curvature in order to maximize spring vertical deflection capability. Thickness throughout the Sigma-spring developed length is graduated in order to minimize induced stresses, weight, and cost. Stiffness of the Sigma-spring can be nonlinear in order to provide improved vibration isolation and can be adjusted for same compact space allowance through increasing or decreasing its number of turns. The Sigma-spring can be made of Polymeric Matrix Composite of resin strengthened at nano-scale by nanometer-sized powder E-glass fibers. Moreover, the Sigma-spring can be made of Metallic Matrix Composite or of whole metallic monolithic material.
Owner:ELMOSELHY SALAH AHMED MOHAMED

Geoid-vertical line deviation correction method and system for GNSS-R specular reflection point

InactiveCN109696697AAdvantages of high spatial resolution observationHigh measurement accuracySatellite radio beaconingVertical deflectionImage resolution
The invention discloses a geoid-vertical line deviation correction method and system for a GNSS-R specular reflection point. The method comprises the steps of acquiring spatial position information ofnavigation satellites and a receiver; determining a specular reflection point on the reference ellipsoid according to the spatial position information of the navigation satellites and the receiver; introducing the elevation correction amount, iteratively correcting the specular reflection point on the reference ellipsoid to the geoid to obtain a specular reflection point on the geoid; calculatingthe spatial geometric relationship between the normal projection of the geoid and the reflection path, determining the vertical line deviation correction amount of the specular reflection point, anditeratively correcting the normal direction of the reflection path to the normal direction of the geoid, and carrying out iterative correction on the specular reflection point on the geoid to obtain afinal specular reflection point corrected by the vertical line deviation on the geoid. The geoid-vertical line deviation correction method and system improve the positioning accuracy of the specularreflection point and provide support for acquiring a marine gravity field with high spatial resolution and high precision.
Owner:CHINA ACADEMY OF SPACE TECHNOLOGY

Panoramic gaze camera space calibration method based on image splicing

ActiveCN103971375AAchieving Spatial CalibrationAccurate control of horizontal deflection angleImage enhancementImage analysisVertical deflectionMotion parameter
The invention discloses a panoramic gaze camera space calibration method based on image splicing. The method includes the steps that firstly, a rotation model of a PTZ camera in a panoramic speed dome is built; secondly, multiple PTZ images shot by the PTZ camera and including all information of scenes are spliced to acquire a panoramic image; thirdly, based on the panoramic image, a mapping relation H2 between pixel points of the panoramic image and motion parameters of the PTZ camera and a mapping relation H1 between the pixel points of the panoramic image and pixel points in a fisheye image are built; fourthly, based on the mapping relation H1 and the mapping relation H2, a mapping relation H between the pixel points of the fisheye image and the motion parameters of the PTZ camera is built, and then panoramic gaze camera space calibration is achieved. By the adoption of the method, a horizontal deflection angle and a vertical deflection angle of the PIZ camera in the panoramic gaze camera can be accurately controlled, the monitoring position of a region of interest of the fisheye image shot by a selected fisheye camera is made to be at the center of the image shot by the PTZ camera, and then accurate positioning monitoring is achieved.
Owner:NAT UNIV OF DEFENSE TECH

Sigma Sigma-springs for suspension systems

Sigma Σ-spring is a spring of a Sigma Σ-shape resembles the capital Sigma Σ letter, above which mass can be suspended vertically while under static or dynamic loading conditions. The outer two arms of the Σ-shape of the spring are inclined such mat to be horizontal while fully loaded ensuring safe compression pattern and providing pre-stressed condition that reduces stress at critically stressed sections. The Σ-shape has two opposite sets of turns of different sizes one of small radius of curvature at the side of line of loading of the mass that can be suspended vertically and the opposite one has large radius of curvature in order to maximize spring vertical deflection capability. Thickness throughout the Σ-spring developed length is graduated in order to minimize induced stresses, weight, and cost. Stiffness of the Σ-spring can be adjusted in compact space condition through increasing or decreasing number of turns of the Σ-spring. The Σ-spring is made of Polymeric Matrix Composite of resin strengthened by mineral clay powder providing built-in damping in addition to springing. Σ-spring of built-in damping can suspend mass passively as a stand-alone spring providing both of springing and damping, or semi-actively through two opposite Σ-springs of built-in damping providing both of springing and damping.
Owner:ELMOSELHY SALAH AHMED MOHAMED

Bypass type vector thrust device suitable for small unmanned aerial vehicle

ActiveCN104044742AControl normal flightRealize up and down deflectionAircraft power plant componentsLow speedVertical deflection
The invention relates to a vector thrust device, in particular to a bypass type vector thrust device. The bypass type vector thrust device is suitable for small unmanned aerial vehicles, and adopts the technical scheme that the bypass type vector thrust device comprises a thrust generation device, a vector nozzle assembly and a flow guide device, wherein the thrust generation device is used for generating air flow, the vector nozzle assembly is used for changing the direction of the air flow, the thrust generation device is a bypass fan (1), the flow guide device comprises a pipeline (4), circular fixing rings (2) and square fixing rings (6), the circular fixing rings (2) and the square fixing rings (6) are arranged at the front and back ends of the pipeline (4), and the vector nozzle assembly comprises a rudder (8), a turntable (12) and a tail nozzle port (10). The bypass type vector thrust device has the advantages that the vertical deflection of the tail nozzle port is realized by controlling a steering device to rotate, the vertical landing and takeoff and the hovering of the small unmanned aerial vehicle are realized, and the unmanned aerial vehicle is guaranteed to realize maneuvering flight at low speed and large angle of attack, and is controlled to normally fly by utilizing the vector thrust to provide additional operation torque when the operation of rudder surface nearly fails.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
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