701 results about "Catenary" patented technology

The invention relates to a device for displacement of at least a small volume of liquid (5) under the effect of an electrical control, including a substrate (1) provided with first electrically conducting means (2), the device also comprising second electrically conducting means (3) arranged facing the first electrically conducting means (2), the first electrically conducting means and the second electrically conducting means possibly being connected to electrical power supply means to enable the application of electrostatic forces to the small liquid volume (5). The second electrically conducting means include at least one conducting wire (3) arranged parallel to the substrate and at a fixed distance from the substrate to enable displacement of the small volume of liquid (5) along said conducting wire (3) under the effect of the applied electrostatic forces.

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.

Apparatus for monitoring alignment of a transverse member conveyor. The member is attached transversely at opposite end portions to two parallel endless chains includes two position sensors affixed and located transversely adjacent to each chain and each other. One or more targets are attached to link(s) of each chain, and at predetermined distances from the member. The position sensors inductively or magnetically sense the relative position of the target(s) on each chain with respect to the respective position sensor adjacent the chain, and send a signal comparing the target and sensor proximity with respect to the target on each chain. This allows determination of whether the opposite end portions of the member attached to the respective chains are aligned transversely within predetermined tolerance limits. Another aspect is monitoring a single position on an endless chain. Another aspect monitors chain catenary.

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.

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 describes apparatuses and methods of monitoring fatigue, structural response, and operational limits in structural components. More particularly, the present invention relates to fatigue, response, and operational monitoring systems on steel catenary risers using optical fiber sensors. The sensors can be pre-installed on new risers, or post-installed sub-sea on existing risers, using a variety of methods.

An apparatus and method for reducing vibrational effects of track chain assembly catenary hang is disclosed. A work machine includes a pair of track roller assemblies one positioned on each side of the work machine. The vibration reducing apparatus and method includes repositioning undercarriage components to vary the catenary hang from one side of the work machine to the other.

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 high speed railway catenary fault diagnosis method based on a deep convolution neural network. The method comprises the following steps: the two-dimensional gray scale image of a high speed railway catenary supporting device is acquired; the deep convolution neural network is pre-trained through a catenary training set, the deep convolution neural network is put to a faster RCNN for training, an equipotential line in the two-dimensional gray scale image is extracted through a trained model and is segmented, and an equipotential line region picture is acquired; and the acquired equipotential line region picture is sequentially subjected to the following processing: the brightness and the contrast are adjusted; recursive Otsu presegmentation is carried out; and ICM / MPM (Iteration condition model / maximization of the posterior marginal) is used to segment and corrode and expand the picture, equipotential line pixel points are obtained, the maximum connected domain is extracted, and the number N of independent connected domains in the equipotential line pixel point region is counted; and if N is larger than m, separable strand fault is judged to happen to the part of the equipotential line. The equipotential line can be accurately positioned, the fault diagnosis accuracy is improved, and the actual production needs are met.

An arrangement and method are disclosed for providing a fluid flow path between a seabed supply of hydrocarbons and a turret moored storage vessel. A steel catenary riser interface buoy provides support for a steel catenary riser and the lower end of a flexible riser. This arrangement allows both risers to be pre-installed prior to arrival of the storage vessel or other floating storage facility. A turret interface buoy, secured to an upper end of the flexible riser is used in the installation process as well as in the hook-up of the riser system to the storage vessel.

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 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).

The invention discloses a ground automatic neutral-section passing device and a control method thereof. The ground automatic neutral-section passing device comprises a train identification unit, a logic control system, a valve control unit, a thyristor valve block unit consisting of two thyristor valve blocks connected in series, and a current detection unit for detecting the current of the thyristor valve blocks, which are connected successively, wherein the thyristor valve block unit is connected with a two-phase power supply arm and a neutral zone of a catenary respectively; the logic control system is connected to one of the thyristor valve blocks according to an identified train travelling position and direction control to supply power for the neutral zone; and when phase change is needed, the logic control system is connected to the other thyristor valve block according to the state switching of thyristor current. According to the control method, neutral-section passing is realized through controlling the two thyristor valve blocks, and when the phase change is performed, if the current of one of the thyristor valve blocks achieves a cross-zero state through detection and judgment, the other thyristor valve block is opened immediately. The ground automatic neutral-section passing device and the control method disclosed by the invention have the advantages of being capable of realizing automatic neutral-section passing of a train under a condition that the power is not cut off, high in reliability, stable in operation, extremely small in power-off dead zone of the neutral zone, and the like.

The invention relates to a drilling engineering design in the petroleum drilling engineering, in particular to wellbore trajectory optimized design and control in the highly-displacement well. For three-stage and four-stage catenary sections, the design of wellbore trajectory is finished through 12 steps. The invention puts forward a new method of two-dimensional catenary trajectory design. A plurality of units with different azimuth wander ratio is divided according to natural deviating rule of formation, which is combined to the formation condition that conforms to the actual situations of drilling engineering. On the basis of maintaining the characteristics and advantages of catenary trajectory and regarding to the influence of natural deviating rule of formation, a method of three-dimensional catenary trajectory design is put forward, which can not only scientifically work out the azimuth lead angle and initial azimuth, but also work out the trajectory parameters of every point inthe wellbore trajectory. The realization of three-dimensional wander trajectory design of catenary section has real meaning of guidance for the drilling design and construction of the highly-displacement well. The invention is used in the field of petroleum and geological exploration.

Dynamic motion decoupling is effected with the use of mass, added mass, buoyancy, submerged weight and drag in areas of relatively low tension. High curvatures of lines on some configurations, together with their low slope may be utilized. The original line configuration may or may not be modified. Known motion suppressing device designs can be used. Because of the low slope on some configurations, said motion suppressing devices can be installed on arbitrarily long line segments to achieve objections required. Novel, drag and added mass enhancing devices effective in all directions can be used to increase the suppression effectiveness and / or in order to reduce the number of devices used. This invention is suitable for use on new designs and it is also suitable for retrofitting on existing, already installed lines.

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.

The invention provides a working platform leveling device for a catenary working car of a railway contact line. The device comprises a leveling mechanism, a leveling hydraulic system and a leveling electronic control system, wherein the leveling mechanism comprises a front seat beam, a rear seat beam and a lift rotary working platform base; the front seat beam and the rear seat beam are fixedly connected with a frame respectively; two sides of the front end of the lift rotary working platform base are connected with the front seat beam through a rotating shaft at the front part; two sides of the rear end of the lift rotary working platform base are connected with the rear seat beam through a rotating shaft at the rear part, and the lift rotary working platform base can rotate left and right around the rotating shaft; and the rear seat beam at the two sides of rear end of the lift rotary working platform is fixedly connected with a leveling cylinder installation seat for installing a cylinder respectively; and a piston rod of the leveling oil cylinder is connected with the lift rotary working platform seat. The working platform leveling device is assembled with a lift rotary working platform of the catenary working car of the railway contact line, so that automatic / manual leveling of the lift rotary working platform when the catenary working car operates on an ultrahigh route of an outer rail can be realized.

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.