698 results about "Catenary" patented technology

Axial flow devices using rigid spiral band profiled blade catenaries attached variably along and around an axially elongated profiled hub, of axially oriented profile section sequences 75 mapped relative to truncated cones-of-generation. Upon rotation and lubricity-masked progression through axial planes-of-shear, this time-domain sequence travels in 2-dimensional axial-datum-plane-relative path-excursions and ejects frictional adhesions via anguillar reverse vortex street thrust due to an after-body accelerating wave shape-sequence 48. This guides bound vortex pressures at linear path-velocity substantially parallel to the collective plane-of-shear, conferring higher differential pressures through path-vector-addition, improved force-vector orientation, extended laminar flows, lower form drag and tip vorticity. As a wind turbine, path-vectors are added to inflow, ducting an increased mass flow inward for increased power extraction per diameter. As a propeller, path-vector-subtraction guides the wave front flight-path-transverse, allowing higher flight velocities and improving thrust-per-torque through enhanced force vectors and mass flow rates.

This invention provides a production riser system that enables fluid communication in a deepwater drilling environment through the use of a variable buoyancy device supporting both a hybrid riser tower and an steel catenary riser (SCR) system. Fluid communication is enabled between a surface production facility or unloading buoy and local and remote subsea (or remote non-subsea) production and export systems.

A method and apparatus for making a mesh reflector that may be used to produce a shaped reflector is provided. The mesh reflector may be an umbrella-style deployable mesh reflector capable of approximating both parabolic and arbitrarily shaped reflecting surfaces, including those with regions of reversed curvature. The reflecting surface may be provided by a soft mesh attached to a highly pre-tensioned net composed of two sets of substantially parallel chords forming a plurality of parallelogram-shaped facets. The net/mesh may be made to conform to the desired shape by pulling and/or pushing on it at each of its facet corners via a set of finely adjustable tension ties and/or compression rods, the distal ends of which react against a set of pre-tensioned catenary-shaped chords disposed on the aft side of the mesh. The net/mesh and the aft catenaries may be supported and pretensioned by a set of substantially stiff radial ribs connected to a central hub by a means capable of providing high deployment torque and a means for controlling and coordinating the deployment of the ribs so that they reach their fully deployed positions nearly simultaneously. Methods for fabricating the mesh and attaching it to the net are also provided.

The invention discloses a high-speed rail catenary geometric parameter detection non-contact compensation and Kalman filtering correction method. The method mainly comprises the steps that firstly, a video camera is triggered to collect video images at equal intervals through an encoder on a wheel set; the regions where target light spots appear in the images are predicted according to prediction strategies; the positions of the target light spots in the images are located according to the centroid method and the image morphology method; the angle of roll vibration is detected through an angle sensor, and compensation is performed on the vibration through coordinate transformation; contact wire height and pull-off values are figured out according to mapping transformation of the light spots from the position of an image coordinate system to the position of a world coordinate system; finally, detecting values are corrected through the Kalman filter equations. According to the method, the defects that the system is low in detecting accuracy, poor in real-time processing performance and the like are effectively overcome, the processing efficiency of the system is improved, and the requirements of high-speed rail catenary on-line detection for real-time performance and accuracy are well satisfied.

A method of controlling a neutral section operation of a train (14) including a lead locomotive (16) and at least one remote locomotive (12) in communication with the lead locomotive. The locomotives are electrically powered from respective electrical connections to a catenary (22) having at least one neutral section (26). The method includes sensing when a lead locomotive is proximate the neutral section of the catenary. The lead locomotive then commands the remote locomotive to perform a neutral section operation when the lead locomotive has traveled a distance equal to a distance (20) between the lead locomotive and the remote locomotive. The lead locomotive determines when to issue a neutral section command based on a speed of the lead locomotive and an elapsed time from when the lead locomotive senses its location proximate the neutral section.

The invention relates to a drilling engineering technology in petroleum engineering, in particular to a method for monitoring the track of an actually drilled wellbore. The method comprises the following steps: acquisition of inclination survey data and naturalization treatment; determination of characteristic parameters of a wellbore track model; determination of a hole inclination equation and an azimuth equation; calculation of coordinate increment; calculation of surveying point coordinates; and so on. As for large-displacement wells containing catenary or parabola tracks and various directional wells and horizontal wells, the method can accurately monitor the coordinates of various surveying points, so as to make the monitoring result accord with the practice of the drilling engineering, thereby effectively improving the construction precision and the reliability of catenary drilling and parabola drilling.

The invention provides a catenary geometrical parameter dynamic detection method based on triangulation, and the method is applied to a vehicle-mounted pantograph catenary dynamic monitoring system or a hand-push type catenary patrol detection vehicle. The method comprises the following steps: 1) obtaining pixel coordinates (xPixel, yPixel) of a catenary in an image and angle change (xAngle, yAngle) of a detection device; 2) carrying out data processing: dividing the whole test range into N sections, and carrying out calibration on each section to enable each section to form a group of camera calibration parameters, judging and obtaining the calibration height section of each pixel coordinate according to the pixel coordinates obtained in the step 1), and obtaining stagger value and height value according to the camera calibration parameters of the height section; 3) carrying out data correction: through correction conversion, obtaining actual stagger value and height value of the catenary; and 4) carrying out slope calculation. The method, based on the triangulation principle, can effectively detect the height, stagger value, distance between two lines and slope of the catenary, thereby ensuring measurement accuracy in the whole range, and eliminating large-range error.

The invention provides a locomotive pantograph-catenary hard point photoelectric vibration comprehensive detection and GPS positioning method. The method includes steps: conversion from arc light to electric signals, analysis and processing of the electric signals, analysis of vibration signals, obtaining of a hard point value via calculation, and GPS accurate positioning. A locomotive pantograph-catenary hard point photoelectric vibration comprehensive detection and GPS positioning system mainly comprises a photoelectric sensor, an acceleration sensor, a signal conditioning device, an isolation transformer, an acquisition card, a control computer, a display, a memory, and a GPS positioner. According to the method and the system, acceleration detection of the hard point and photoelectric detection of the hard point are effectively combined, more accurate discrimination of the hard point can be made via double discrimination, accurate positioning of the hard point of a contact system is realized by employing an advanced GPS positioning module, the search and maintenance of faults are simple, and failure to adapt to the development requirement of high-speed rails and false and missed judgments can be avoided.

A system of suspended photovoltaic modules relative to a surface wherein modules are suspended generally parallel and spaced apart along the length of dual pairs of catenary cables. A hanger assembly permits initial attachment of a module during installation as the cables are mounted to the rear surfaces of the modules via mid clamp assemblies. End clamp assemblies attach the modules to the cables proximate stanchions having two spaced posts joined by cross beams, a top cross beam angled to define an inclined plane. The respective pairs of cables supporting the modules are joined with cable cross ties to form a catenary shape. The modules may be suspended in a generally consistent inclined plane or a slightly concave curve. The catenary cables and clips are sized and shaped to allow the modules limited sway movement as necessary to reduce stresses and forces during wind or other adverse weather events.

A mooring line for an oceanographic buoy system includes four sections. The first section is a protected cable that is connectable to the buoy. The second section is an energy absorbing cable. The third section is a weighted cable. The fourth section is a buoyant cable that is connectable to the anchor. The four sections are connected in series by smooth transitional connections. When the mooring line is deployed, it has an inverse catenary lay.

The invention discloses an AC electrified railway traction in-phase power supply device based on a YNd11 connection transformer, the traction transformer of the device is a three-phase transformer (T1) connected in YNd11, and the three primary sides of the transformer (T1) in a YN connection The three phases A, B, and C are connected to the high-voltage public power grid, and the low-voltage side terminals (a, b, c) of the transformer are connected to a power flow controller (IC), and the terminals a and b are connected to the electrified railway catenary (TR) . The device can realize the same-phase power supply for the entire railway line without phase separation, and the power supply voltage is stable, ensuring the high-speed and heavy-load operation of the locomotive; at the same time, the device can eliminate the negative sequence, reactive power and harmonics of the railway traction load on the electric energy of the public grid impact, low cost, and easy implementation.

The invention discloses a three-wheel inspection robot mechanism capable of crossing over the catenary of a pole and tower, which comprises a three arm groups; each arm group is installed on a base respectively through a gear box and respectively provided with two rotational degrees of freedom in a horizontal plane, two rotational degrees of freedom in a vertical plane and one rolling degree of freedom, and a front hand clamp is respectively installed on the wrist via each arm group, which can prevent the robot from dropping out from a power line; and a gravity center adjusting and balancing mechanism is arranged below the base, which can freely slide in front of, behind and on left and right of the robot body, and a robot electrical device connected below the gravity center adjusting and balancing mechanism is taken as a balancing block, so that the arm group which moves away can newly return to the power line after finishing the planning actions. By adopting the structure, the robot can stably run on the power line and also can cross over the obstacles on the power line, such as wire clips, vibration dampers and the like, and more importantly, the robot can smoothly cross over the drainage wire.

The invention discloses a suspension rod force and main cable shape combined calculation method for a suspension bridge. The method comprises the following steps of (1) establishing a coordinate system by taking a mid-span left tangent point and suspension points of the suspension bridge as coordinate origins, and representing catenaries of main cable sections; (2) supposing a group of suspensionrod forces, namely endowing each suspension force with an initial value; (3) calculating a completed bridge cable shape and an internal force of a mid-span main cable by utilizing an analysis method;(4) according to the numerical values calculated in the step (3), building a suspension bridge finite element model, calculating the suspension rod force, checking an error between a value of the suspension rod force and an assumed value of the suspension rod force by using a Euclidean norm, and if the error exceeds a limit value, returning to the step (2) together with the newly calculated suspension rod force, otherwise, obtaining the mid-span main cable shape and the accurate suspension rod force of the suspension bridge; and (5) calculating a side-span main cable shape by utilizing a horizontal component of the internal force of the mid-span main cable as an existing condition. According to the method, the accurate suspension rod force and the corresponding completed bridge main cableshape of the suspension bridge can be obtained, wherein the completed bridge main cable shape comprises accurate position of the tangent point.

The railway system has a DC voltage catenary (20) connected to a rectifier bridge block (40) that is in turn connected to a transformer (30) joined to a three-phase AC grid (10). The device (50) has a first DC/DC voltage raising block (51) connected between the catenary (20) and an intermediate bus that is connected to a second DC/AC three-phase current generation block (52) joined to the transformer (30). The first block (51) allows raising the DC voltage of the catenary (20) generating a controlled voltage with which the second block (52) generates a high-quality three-phase current that is delivered to the grid (10).

A system and a process are provided for transferring a cryogenic fluid such as liquefied natural gas between a floating transport vessel and a storage vessel. The fluid is transferred through at least one submerged/subsea/subsurface catenary flexible conduit, the conduits being configured to avoid damage from waves and abrasion or contact with the other conduits, the vessels, or other objects. A conduit transfer vessel is provided for storing the conduit in the water, delivering the conduit to each transport vessel, but standing off from the transport vessel during cryogenic fluid transfer, and then retrieving the conduit from the transport vessel, which greatly improves the safety of the cryogenic fluid transfer operations.

A method and apparatus for confirming whether wire bonds are successfully made to sites on a workpiece by an ultrasonic bonding tool using wire supplied to an entrance bore through the tool from a despooling wire supply spool, and for providing a fault detection status signal if bonds are not successfully made, utilizes an automatic wire despooler which includes a spool drive motor for rotating a wire supply spool to thereby pay out wire from the supply spool to form a drooping catenary-shaped length of slack wire, located between the spool and an output wire guide having an aperture through which wire is supplied to a bonding machine head that supports an ultrasonic bonding tool. The apparatus includes a proximity-type feed sensor for detecting when the catenary straightens and shortens a predetermined amount in response to tension caused by moving the tool tip between successive bond sites, thereby drawing wire out through an exit opening of the bonding tool bore. Shortening the slack length a predetermined amount straightens and elevates the center part or vertex of the catenary upwardly towards the proximity sensor; when the slack length is sufficiently short, the catenary vertex is brought into the detection range of the proximity sensor, which then outputs an electrical signal that causes the drive motor to rotate a predetermined amount in a forward sense, paying out wire from the supply spool and increasing the length of the slack length catenary segment to a value which causes the catenary to droop below the detection range of the proximity sensor. After each wire interconnection made between a pair of bond sites of normal or greater length, or a small number of very short interconnections, the proximity sensor is interrogated by a computer logic means to determine that the despooler has been run to advance at least the minimum length of wire. If there has been no run, a bond fault alarm status signal is generated, halting further bonding operations.

The invention discloses a visual worktable for workpiece conveying on a catenary, which at least comprises a worktable frame, a rotary table, a rotary table drive device and a machine vision system, wherein the upper surface of the rotary table is used for placing workpieces, the rotary table is provided with a fixture for clamping workpieces, and the rotary table is arranged above the worktable frame through a central shaft; the rotary table drive device is used for driving the rotary table to rotate around the central shaft; and the machine vision system is used for continuously acquiring an image of the surface of a workpiece on the rotary table and finding out a preset feature part of the workpiece in the rotating process of the rotary table, thereby obtaining a positioning rotating angle required by the forward or reverse rotation of the rotary table in the process of workpiece positioning according to the rotating angle of the rotary table when the feature part of the workpiece is measured, and outputting a control signal to the rotary table drive device to drive the rotary table to rotate forwardly or reversely for the positioning rotating angle so as to drive the workpiece to rotate to a correct orientation. The worktable can rotate a conveyed workpiece or a workpiece placed on the worktable to rotate a corresponding angle so as to provide an ideal workpiece orientation for an automatic conveying device, so that the automatic conveying device can be accurately hung on a catenary production line.

A parabolic trough solar collector system has a parabolic reflector used with an independently supported collector tube. The parabolic reflector has a reflective surface formed on a reflective surface support structure, supported by a circular support beam. This assembly rests on a plurality of support and drive rollers supported by a roller support arm, supported by a roller support column. The parabolic reflector assembly rotates against the rollers along a single axis to maintain a focus line of the parabolic reflector surface at the same location as the center of the circle described by the outer edge of the circular support beam. Located at this same focus line is the independently supported collector tube not attached to the parabolic trough reflector. The collector tube is supported on pipe roller hangers, which in turn are supported by a wire catenary system connected to support towers which straddle the parabolic reflector.

A system and method is provided for determining curvature for subsea riser system, including but not limited to drilling risers, steel catenary risers, lazy-wave catenary risers and riser jumpers, comprising the steps of: periodically measuring acceleration in a first lateral direction at said vertical position to obtain a first acceleration timetrace processing said first acceleration timetrace to obtain a first acceleration spectra; applying a transfer function to said first acceleration spectra to obtain a first curvature spectra; and processing said first curvature spectra to obtain a first curvature timetrace. Preferably the transfer function is determined by a method comprising the step of modelling the riser as a Tensioned Timoshenko Beam.

The curvature may be used to determine stress and fatigue damage in a structure from motions measured at a single location or a combination of motions measured at a single location with or without tension measurement. The method can be used to determine curvature and hence stress and fatigue damage from any source of excitation, for example the excitation at the tension ring by the top tensioner system, and the vortex induced vibration locked in at any water depth.

The invention provides a maximum sag modeling method of a substation flexible conductor on the basis of a catenary. The method includes the steps of firstly, dividing the substation flexible conductor into a strain insulator string and a flexible bus, and determining structure parameters and material parameters; secondly, establishing an X-Y coordinate system with a hanging point of the strain insulator string as an original point, establishing the spatial coordinate equation of the strain insulator string assuming that the hanging point bearing reaction force RA and the horizontal tension T0 are known, and obtaining the horizontal projection length and the perpendicular projection length of the strain insulator string; thirdly, establishing an x-y coordinate system with an end point of the flexible bus as an original point, and obtaining the flexible bus catenary equation on the basis of a catenary theory; fourthly, converting the flexible bus from the x-y coordinate system to the X-Y coordinate system through coordinate conversion, obtaining the substation flexible conductor sag expression through the combination of the spatial coordinate equation of the strain insulator string, and then obtaining the maximum sag value of the flexible conductor. On the basis of the known structure parameters and the known material parameters, the accurate maximum sag value is directly obtained according to any design stress of a substation, the sag control is facilitated, and quite high application value is obtained.