312 results about "Catenary" patented technology

A control system for a towed object (1, 6; 20; 30; 50) in or on a body of water comprise one or more towing members (3) extending between the object (1) and a towing vessel (2). One or more ballast members (4) are movably connected to a respective one of said one or more towing members (3) and controllably movable at least a distance along its respective towing member. The towed object (1) may be controlled by moving one or more ballast members (4) on a towing member (3) in order to control the catenary (c) of a towing member (3). Individual ballast members (4) may be manipulated individually in order to correct, preserve or otherwise change the geometry of a trawl.

The invention relates to the technical field of railway catenary monitoring, in particular to a multi-source sensing fusion method and system for state evaluation of a catenary compensation device, and the method comprises the steps: obtaining multi-source sensing data such as vibration, temperature and current, generating a phase space trajectory through employing a self-adaptive phase space reconstruction technology, and carrying out the state evaluation of the catenary compensation device; multiple topological features are extracted to form topological feature vectors, and the vectors are combined with temperature and current data to construct a fault probability model. According to the method, the health degree score of the contact network compensation device can be calculated, trend prediction can be carried out, early warning information can be generated, high-precision early warning is realized, the clamping stagnation risk of the pulley block can be predicted three months in advance, passive response is converted into active prevention, the maintenance efficiency and safety of the contact network are remarkably improved, and the maintenance cost is reduced. By means of the innovative technology, the safety of railway operation is improved, the maintenance cost is reduced, and revolutionary transformation is brought to the railway industry.

The invention discloses a method and a system for evaluating the reliability of a contact network system under an icing galloping condition. The method comprises the following steps: collecting icing galloping data of the overhead line system in real time, and carrying out load conversion and statistics on parts of the overhead line system in icing galloping by adopting a rain flow counting method; the reliability of parts under the icing galloping condition is calculated through the Miner cumulative damage theory, and weight distribution of the overhead line system is conducted through an analytic hierarchy process; based on the reliability and the weight distribution result of each part under the icing galloping condition, evaluating the reliability of the overhead line system of the data acquisition anchor section until the evaluation task is finished; the method and the system provided by the invention are suitable for evaluating the operation reliability of the contact network system in the icing galloping section, can provide support for operation and maintenance of the contact network system after icing galloping occurs, and have wide application prospects.

The invention belongs to the technical field of geospatial information systems, and particularly relates to a component-level catenary three-dimensional model lightweight three-dimensional tile conversion method, which comprises the following steps: S1, forming a component-level fine model data set with semantic annotations; s2, constructing a detail level division rule; s3, reconstructing a lightweight linear component model; s4, constructing a comprehensive evaluation function Q, deleting the body-shaped components of which the Q values are smaller than a preset threshold value, and retaining the body-shaped components of which the Q values are greater than or equal to the preset threshold value; s5, obtaining optimized body-shaped component model data; and S6, according to the detail level division rule in the S2, assembling and recombining the lightweight linear component model in the S3 and the optimized body-shaped component model data in the S5, generating a hierarchical component structure, converting each component into a three-dimensional instance model, and outputting a three-dimensional tile data structure. And efficient organization and visualization of the contact network BIM model in the GIS environment are realized.

The invention discloses an intelligent surveying and mapping system for catenary equipment in a tunnel, which relates to the technical field of catenary engineering detection and comprises a multi-source data acquisition module, a multi-source data fusion module, an identification and parameter calculation module, a modeling and interaction module and a data management and application output module. According to the invention, by deploying the multi-dimensional sensor, the limitation of traditional manual inspection or dependence of a single sensor is broken through aiming at the environments of insufficient illumination, high dust concentration and the like in the tunnel, the laser scanner can penetrate through the dust to obtain the three-dimensional geometric framework of the equipment, and the Beidou positioning assembly is bound with the collection action in real time; the problem of positioning deviation caused by weak GPS signals in the tunnel is solved, the environment sensor group monitors parameters such as temperature, humidity and illumination in real time, and through a dynamic adaptation fusion coefficient formula, sensor data weight is calculated, original coordinate deviation is corrected, a four-dimensional fusion data set is constructed, and errors caused by environment interference or data isolation in a traditional method are solved.

The invention relates to the technical field of pantograph-catenary system monitoring, and discloses a nonlinear pantograph-catenary system state prediction method based on a physical information neural network, and the method comprises the steps: obtaining the structural parameters of a catenary and a pantograph in a nonlinear pantograph-catenary system, and the train speed; a multi-expert Mama network based on Fourier transform is constructed; utilizing the first full connection layer to map input features formed by the structural parameters of the contact net and the pantograph and the train speed to a high-dimensional feature space to obtain first high-dimensional features; frequency domain features are extracted from the first high-dimensional features by using a plurality of cascaded multi-expert Mamba network layers, and time sequence features are modeled at the same time; fusing the spliced frequency domain feature and the time sequence feature by using a second full connection layer to obtain a second high-dimensional feature fusing the time-frequency energy and the dynamic evolution information; and performing nonlinear pantograph-catenary system state prediction according to the second high-dimensional features. According to the invention, the state prediction accuracy of the nonlinear pantograph-catenary system can be improved.

The invention provides a mountain slope transmission system catenary determining method and device, and the method comprises the steps: obtaining the arrangement parameters of a transmission system on a mountain slope, and the arrangement parameters at least comprise the horizontal distance between two fixed points of the transmission system, the vertical height difference, and the total length of a rope of the transmission system; based on the arrangement parameters, a simultaneous equation with the catenary opening coefficient as a core unknown quantity is established, and the simultaneous equation comprises the arc length constraint of the catenary and the height difference constraint of the two end points at the same time; solving the simultaneous equation to obtain a numerical solution of the catenary opening coefficient; and determining a catenary shape and a core engineering index of the transmission system on the mountain slope under the action of gravity according to the solved catenary opening coefficient. According to the method and the device, the engineering design precision is improved, and material redundancy and adjustment cost caused by shape uncertainty are saved.

The invention discloses a three-dimensional reconstruction method, device and equipment for a power transmission conductor, and a storage medium. The method comprises the following steps: acquiring original point cloud data of a conductor in a target area; performing coarse extraction on the original point cloud data to obtain coarse extraction point cloud data; performing classification extraction on the coarsely extracted point cloud data to obtain target point cloud data; conducting wire aerial form fitting on the target point cloud data based on a catenary equation to obtain a catenary aerial fitting result; according to the method, the lead in the target area is reconstructed according to the catenary air fitting result, the lead three-dimensional scene model is obtained, the real state and the space relation of the transmission lead can be reflected more accurately, and the reconstruction quality of the lead three-dimensional scene model is improved.

The invention discloses a vortex-induced fatigue analysis method and device for a deep-sea steel catenary riser, electronic equipment and a storage medium, and belongs to the technical field of ocean facilities. The method comprises the following steps: acquiring motion data of an offshore platform; determining an equivalent oscillatory flow of the offshore platform based on the motion data; according to the equivalent oscillatory flow, vortex-induced vibration response of the deep-sea steel catenary riser is determined based on fluid-structure interaction effect analysis; according to the vortex-induced vibration response, the equivalent stress time history of the deep-sea steel catenary riser is obtained through calculation, and therefore a vortex-induced fatigue analysis result is determined. According to the invention, the platform motion can induce the riser to generate vortex-induced vibration, the equivalent mode is established to convert the platform motion into the oscillatory flow, and the fluid-solid coupling effect between the riser and the flow field is considered, so that the calculation is easy to realize and the precision is high; the perfection degree and reliability of the vortex-induced fatigue analysis result of the deep-sea steel catenary riser can be improved, and the fatigue damage degree of the deep-sea steel catenary riser can be accurately mastered.

The invention relates to the technical field of power transmission line construction, in particular to a continuous uphill and downhill construction sag determination method and system considering the influence of a strain string, and the method comprises the steps: obtaining basic parameters of a continuous uphill and downhill line; the method comprises the following steps: establishing a mechanical model containing a strain string, regarding the strain string as a catenary unit with distributed weight, forming a continuous span combined stress system with a lead, and constructing a mechanical equilibrium equation set of the system; based on the mechanical equilibrium equation set, adopting an iterative algorithm to solve the tension value of the continuous-gear wire gear by gear, taking the initial tension of the first gear as a starting point, and sequentially iterating to determine the final tension; calculating a construction sag value according to the final tension in combination with each span parameter and a tension string deflection angle; and outputting the sag value of each gear and the corresponding wire clamp installation position adjustment parameter. According to the method, the sag calculation precision of the continuous uphill and downhill terrains is improved, and the design and construction accuracy is guaranteed.

The invention discloses a modeling method, device and equipment for a sling lifting net blocking system and a storage medium. The method comprises the following steps: acquiring working state parameters of a bearing cable under the overhead line crossing construction working condition, and determining an initial bearing cable curve based on a catenary formula, boundary conditions of suspension points on two sides of the bearing cable and the working state parameters of the bearing cable; constructing a finite element analysis model based on the initial bearing cable curve, and determining stress distribution data and deformation data of the bearing cable based on the finite element model; and under the condition that the stress distribution data and the deformation data meet preset engineering requirements, determining the finite element analysis model as a target mechanical analysis model. The technical effects of accurately simulating the stress and deformation of the bearing cable and guaranteeing the construction safety are achieved.

The invention discloses a linear variation stiffness matrix method for suspension bridge space cable forming form finding, relates to the technical field of bridge numerical simulation, and solves the defects of a stiffness matrix in the process of solving the suspension bridge forming form finding through a segmented catenary method. The method comprises the steps that a suspension bridge is simplified into a space cable system composed of a main span, a side span and an anchor span, and the main span, the side span and the anchor span are sequentially subjected to a bridge forming and shape finding process; the linear change stiffness matrix solved in the bridge forming and shape finding process of the main span is used for representing the linear relation between the displacement change of the control point and the initial force change of the main cable; according to the method, an analytical expression of a linear change stiffness matrix is deduced, and an efficient iterative algorithm is established. According to the algorithm, the initial force correction is directly calculated according to the displacement error of the control point in each iteration.

The invention discloses a method for calculating and visualizing the bearing capacity of a power transmission line under extreme meteorological conditions based on GIM and WebGIS. The method comprises the whole process from data analysis to real-time stress monitoring. A three-dimensional model of a power assembly is constructed by analyzing a GIM file of a power transmission line, and the three-dimensional model is exported into a standard format for verification. Meteorological data are collected and processed, meteorological parameter influence coefficients are configured, ultimate bearing capacity is calculated, and stress analysis and safety evaluation are carried out. The space coordinates of the sag conductor are calculated based on the three-dimensional model of the power transmission line, and a real-time conductor model is generated in combination with meteorological data and physical parameters of the catenary. And dynamically updating the state of the power transmission line through a three-dimensional visualization technology in combination with the tower model, the stress data, the lead model and the lead deformation degree, so as to find potential risks in time and take countermeasures. According to the scheme, accurate decision support can be provided for safety monitoring and maintenance of the power transmission line.

The invention discloses a cable-stayed bridge inhaul cable design method, device and equipment and a readable storage medium, and relates to the technical field of bridge design, and the method comprises the following steps: obtaining cable-stayed bridge inhaul cable calculation parameters, and constructing an endpoint tangent two-dimensional catenary equation; calculating the length of a catenary according to the cable-stayed bridge cable calculation parameters; calculating a projection vector of a catenary and an included angle between the catenary and an XYZ coordinate axis according to the cable-stayed bridge cable calculation parameters and an end point tangent two-dimensional catenary equation; inputting the projection vector of the catenary and the included angle between the catenary and the XYZ coordinate axis into the tower end conduit geometric model to obtain the length of the cable conduit and the coordinates of the two ends of the cable conduit; outputting the length of the catenary, the projection vector of the catenary, the included angle between the catenary and the XYZ coordinate axis, the length of the cable conduit and the coordinates of the two ends of the cable conduit, and completing the design of the cable-stayed bridge cable. In the cable-stayed bridge cable design, manual calculation is reduced, the design efficiency is improved, and complex manual iterative calculation and the situation that a formula needs to be redesigned due to the change of the shape of a bridge tower are avoided.

The invention relates to a meshbelt structure simulation method with heterogeneous left and right selvedges based on parameterized segmented modeling, which comprises the following steps of: deconstructing a meshbelt into three heterogeneous functional areas of left overlock, middle main body and right connection, and independently controlling by adopting a Bezier curve, a composite wave equation and a catenary fusion model respectively; the synchronous accurate expression of the closeness of the left side overlock coil, the warp and weft interweaving stability of the main body and the mechanical rationality of the right side U-shaped connection is realized, and the problem of geometric distortion caused by unified modeling in the prior art is solved. According to the method, a cross-scale coupling equation of tension (T), a friction coefficient (mu) and linear density (rho) is introduced, and a closed-loop mapping relation of technological parameters, geometrical morphology and mechanical response is established. For example, when the tension of the braid is increased, the curvature radius of the U-shaped connecting part is automatically reconstructed according to a formula, so that parameter regulation and control are upgraded from experience trial and error to intelligent optimization of physical driving.

The invention relates to the technical field of bridge engineering, in particular to an image-based suspension bridge main cable tension recognition method, device and equipment, and the method comprises the steps: obtaining a live-action image of a target suspension bridge, and calculating a transformation matrix according to the live-action image and the panel size of the target suspension bridge; on the basis of the pixel coordinates of the main cable in the live-action image, calculating the positive view angle two-dimensional coordinates of the main cable in combination with the transformation matrix; constructing a catenary analytic expression of the main cable according to the positive view angle two-dimensional coordinates, and obtaining a curvature value of the main cable and a slope of the main cable at any position; the horizontal force value of the main cable is calculated according to the curvature value, and the tension of the main cable at any position is calculated according to the slope of the main cable at any position and the horizontal force value. The method overcomes the limitation of equipment complexity and dependence on manual excitation in a traditional method, is simple to operate and low in cost, can efficiently identify the tension of the main cable in a non-contact manner, and is wide in application range and high in adaptability.

The invention provides a power transmission tower and wire safety assessment method and system under the action of avalanche-blast, and belongs to the technical field of power transmission engineering. A power transmission tower is equivalent to a multi-degree-of-freedom cantilever beam structure, a wire is equivalent to a catenary structure, and two working conditions of direct disaster of the power transmission tower and disaster of the wire are divided according to a spatial relationship between an avalanche core and an impact blast and a power transmission system; on the basis of power parameters obtained through avalanche-blast motion simulation, under the working condition that the power transmission tower is directly affected, the power parameters serve as loads to be applied to the power transmission tower model for power response analysis so as to evaluate safety; and under the working condition that the lead is affected, applying the lead as excitation to a lead model to solve lead response and tension, and transmitting the tension to the tower body to evaluate the overall safety of the tower line. According to the invention, comprehensive evaluation of the safety state of the power transmission system under the action of avalanche-blast is realized, and technical support is provided for planning, design and protection of a power transmission line in an avalanche-prone area.

The application discloses a high-speed railway pantograph-catenary arc electromagnetic radiation interference modeling analysis method, constructs a pantograph-catenary arc-pantograph power supply system integrated model containing a traction substation model, a traction network model, a train traction transmission system model, a train-track return current grounding system model and a pantograph-catenary arc model; under a pantograph-off arc transient condition, arc current is obtained through simulation calculation; and based on the arc current, a relationship between arc radiation power and spatial equivalent electric field intensity is established to represent the influence of time-varying characteristics of traction network electrical parameters on pantograph-catenary arc electromagnetic radiation interference. Under the pantograph-off arc transient condition, the real-time changes of impedance and capacitive reactance parameters of the traction network are involved in the unified solution of arc current formation, radiation power evolution and spatial electric field intensity calculation, and meanwhile, key coupling factors of the train high-voltage system and the train-track grounding system are mainly considered, so that the accuracy and engineering applicability of pantograph-catenary arc electromagnetic radiation interference analysis are improved.

The application discloses a kind of bite anti-disengagement type butterfly fixed support, the locking block of first connecting unit top is connected with the locking hole in the central force cable seat, the bite groove below locking block is connected with the bite hook of second connecting unit, the limit hole below bite groove is matched with bite hook, first installation part is arranged below limit hole, second installation part is arranged below bite hook, locking hole side wall is symmetrically provided with locking groove, locking groove is matched with the protruding place of both sides of locking block, annular fixing table is symmetrically provided between locking groove in the upper part of locking hole, locking groove is matched with the lower part of T-shaped locking rod, the central force cable seat is provided with first placing groove, and the second placing groove on the cover plate of central force cable seat is symmetrically arranged with first placing groove.The application uses the above-mentioned structure of a kind of bite anti-disengagement type butterfly fixed support, uses the connection mode of bite hook and bite groove, greatly reduces the use amount of bolt, and when catenary is used, stability is good and safety factor is high.

This invention discloses a constant tension overhead line guiding device for electrified railway catenary, relating to the field of railway catenary technology. It includes: a high-position mounting frame fixedly connected to a constant tension overhead line vehicle; a mounting plate fixed to the top of the high-position mounting frame; and multiple opposing guide components mounted on the mounting plate. It also includes: a support cylinder rotatably connected to the guide components; an adjusting arm slidably sleeved inside the support cylinder; and a monitoring unit connected to the support cylinder for detecting tilting of cables passing through the guide components. Through the monitoring unit, this invention can detect in real time whether the cables passing through the guide components are tilting. When the cable tilts, it generates a lateral force on the support cylinder, causing the adjusting arm to slide within the support cylinder. Furthermore, by controlling the action of the adjusting unit, the position of the adjusting arm, support cylinder, and guide components is adjusted, achieving real-time correction of the cable's direction.

The application discloses a rigid contact net self-adaptive polishing control method and system, belongs to the technical field of track traffic power supply equipment maintenance, obtains the pantograph-catenary action historical data of each position along the busbar direction of the contact net, and constructs a contact wire damage index distribution curve; based on the damage index, a high damage interval is identified, roughness, corrugation amplitude and oxidation thickness parameters are extracted, a damage intensity vector is constructed, and a fuzzy comprehensive evaluation method is used to calculate the damage level score of each position; according to the scoring results, a preset polishing strategy library is matched, corresponding polishing wheel combinations, rotating speeds and contact pressures are determined, and a control parameter set is generated; the polishing device dynamically adjusts the working state according to the control parameters in the running process, and the method realizes the whole-process self-adaptive closed-loop control of state recognition, strategy decision, execution control and quality feedback of the contact wire polishing operation.

The invention discloses a dynamic correction method, device and equipment for a contact network conductor height measurement error and a medium, and is applied to the field of precision measurement of geometric parameters of a contact network. According to the method, the three-dimensional distortion degree corresponding to the original pull-out value sequence is analyzed, the three-dimensional distortion degree, the vertical acceleration and the pitch angle rate jointly construct a height guide error-distortion degree time sequence correlation model related to the height guide error, then the original height guide sequence is compensated and corrected, and the correction effect is verified. The guide height error-distortion degree time sequence correlation model effectively utilizes the internal stability of a pull-out value, and accurate traceability and measurement of the guide height error are realized; the dynamic adaptive capacity of the model is enhanced through the three-dimensional distortion degree, so that the model can intelligently adapt to changes of complex working conditions, and the robustness and reliability under different line conditions are remarkably improved; according to the method provided by the invention, an acquisition-correction-correction verification closed loop is formed, and the credibility and the accuracy of the contact network detection system are improved.

This invention discloses a method for detecting abnormal states of railway contact wire bolts, comprising: S1, acquiring contact wire bolt state monitoring images and performing cropping preprocessing to obtain image blocks; S2, detecting the preprocessed image blocks to obtain bolt targets; S3, classifying the bolt targets in the image blocks output in step S2 using a classification network to obtain the bolt target state; This invention can quickly and accurately detect abnormal states of bolts, improve the average detection rate of bolt positioning and the average identification accuracy of bolt defects, and reduce manual labor intensity.

The utility model provides an overhead line system composite material cantilever device insulation connector comprising a first insulation double-lug assembly, a second insulation double-lug assembly detachably connected with the first insulation double-lug assembly, and a first locking assembly for locking the first insulation double-lug assembly and the second insulation double-lug assembly. A gap for insertion of a cantilever is formed between the first insulating double-lug assembly and the second insulating double-lug assembly, the second insulating double-lug assembly is provided with a matching through groove, and the inner wall of the matching through groove is provided with a matching through hole; the second locking assembly and the third locking assembly are arranged on the cantilever connecting pin shaft. By adopting the structure, the cantilever connecting pin shaft is fixed by adopting a double-locking structure. Connection is simpler, the angle is freer, and the weight is lighter. The risk of partial discharge of the composite material cantilever device of the overhead line system can be avoided, and the power supply safety and reliability of the overhead line system of the electrified railway are improved.

The application discloses a bridge section catenary support post position automatic arrangement method and device, equipment and a storage medium, and relates to the technical field of electrified railway catenary, and comprises the following steps: configuring standard span, maximum span, minimum span and maximum allowable value of adjacent span difference as design parameters in an initial catenary plane layout; automatically obtaining bridge and bridge pier table attributes based on a bridge table and a bridge pier table; performing support offset arrangement calculation based on the design parameters and the bridge and bridge pier table attributes to obtain selected support positions; and automatically arranging catenary support posts based on the selected support positions, so as to meet the requirements of bridge type description, catenary support post position and bridge pier table distance setting, and catenary support post automatic arrangement of a bridge section.

A golf ball dimple half profile is disclosed herein that can be defined by a piecewise function. The sub-functions that define the piecewise function can include, for example, a catenary function and a Gabriel's horn function. A transition between the sub-functions defining the piecewise function is smooth. At least one of the sub-functions can have a non-constant radius of curvature. The golf ball dimple half profile is rotated about the dimple's centroid to create the full dimple profile.

The invention relates to the field of ship navigation, in particular to a safety analysis method and device for ships connected with elevated cables in waves, electronic equipment and a computer readable storage medium. The method comprises the steps that a ship coupling motion equation set is constructed, and the ship coupling motion equation set comprises force and torque, acting on a first ship and a second ship, of an elevated cable; solving a ship coupling motion equation set based on the set wave data, and obtaining first ship coupling motion data, second ship coupling motion data and elevated cable mechanical data under the set wave data; and determining the safety of the first ship and the second ship based on the first ship coupling motion data, the second ship coupling motion data and the elevated cable mechanical data. According to the safety analysis method and device for the ship connected with the elevated cable in the wave, the electronic equipment and the computer readable storage medium, the technical effect of improving the navigation safety of the ship connected with the elevated cable in the wave can be achieved.

1. Name of the designed product: card holder (arc shape). 2. Use of the designed product: a placing device for mobile phone cards. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view 1.

The invention relates to the field of railway construction, and provides a railway contact network bearing wire replacement construction method which comprises the following steps: S1, preparing construction before wire replacement; s11, breaking and dismantling the existing crimping type electric connecting wire clamp, and replacing the existing crimping type electric connecting wire clamp with a bolt type electric connecting wire clamp; s12, the old elastic crane is temporarily dismantled; s13, parameters of the existing anchor section and elastic hoisting tension are comprehensively measured; s14, the anchor section parameters are divided into 30 sections of anchor section supporting column parameters, and the 30 sections of anchor section supporting columns are anchor section supporting columns from the first anchor section supporting column to the third anchor section supporting column; s15, operation vehicle marshalling: marshalling constant tension vehicles according to construction requirements; s16, making a working vehicle operation plan, and moving the working vehicle to a specified anchor section support column according to a No.30 anchor section support column; s2, line changing construction is carried out; S21, a carrier cable is replaced; s22, replacing a contact line; s3, fine adjustment construction; s31, the catenary is finely adjusted; and S4, performing dynamic inspection to recover the normal speed. The method has the effects of formulating the path of the anchor section strut and the operation vehicle and ensuring the operation stability.

The invention relates to the technical field of rail transit transportation, in particular to a rigid contact net polishing robot which comprises a rigid contact net and a polishing robot body, a battery box is fixedly connected into the polishing robot body, a hinge frame is fixedly connected to the side face of the battery box, a hinge connecting rod is rotationally connected to the hinge frame, and a hinge frame is arranged on the other side of the hinge connecting rod. An electric push rod is rotationally connected between the two hinge frames, a grinding disc is rotationally connected to the hinge frame on the outer side, and a detection mechanism is arranged on one side of the grinding robot. In the advancing process of the grinding robot, the abrasion point is detected and marked through the detection mechanism, then the electric push rod is started, the hinge connecting rod is driven to rise with the hinge frame on the battery box as the axis, and therefore the grinding disc is driven to move upwards and be attached to the abrasion point to grind the abrasion point, manual intervention for detection and grinding is not needed, the grinding efficiency is higher, and the labor intensity is lowered. And the polishing consistency is ensured, and potential safety hazards existing in manual polishing and additional damage to the rigid contact net are avoided.