673 results about "Cable tension" patented technology

The invention provides a power transmission line monitoring method based on edge calculation, and the method comprises the steps: deploying an intelligent edge calculation unit at a key node of a power transmission line, and collecting the icing thickness, environment temperature and humidity, cable tension and other multi-source data in real time; processing the data by using an edge calculation fusion algorithm, generating a real-time early warning signal and an abnormal data set, and calculating a risk assessment index by using an adaptive neural network optimization algorithm in combination with a historical environment; when the risk assessment index reaches an early warning threshold value, data are uploaded to a remote monitoring center through a communication module, a fault point is quickly positioned, a fault diagnosis report is generated, and real-time monitoring of the state of the power transmission line and intelligent management of safe operation are achieved.

The invention provides a ship automatic mooring control strategy optimization method and system based on multi-source data, and the method comprises the steps: firstly obtaining multi-source perception data of a target ship, carrying out the preprocessing of the data, forming a standard data set, extracting dynamic feature parameters from the preprocessed data through a sliding time window, and obtaining a target ship automatic mooring control strategy; comprising ship dynamic offset, environment interference intensity and mooring energy consumption distribution parameters. A dynamic optimization strategy generation model is called, and an optimization parameter set is generated according to the difference between the ship dynamic offset and the safety threshold value, the matching degree between the environment interference and the interference threshold value and the deviation between the mooring energy consumption and the optimization target. According to the set, parameters of an executing mechanism of the automatic ship mooring control system are dynamically adjusted, a control instruction is generated, meanwhile, the ship attitude offset and the cable tension fluctuation amount during mooring are monitored in real time, finally, feedback correction is conducted on the optimized parameter set based on the monitoring result, and a corrected control strategy is obtained. Therefore, the continuous optimization of the automatic mooring control strategy of the ship is realized, and the safety and efficiency of mooring are effectively improved.

The invention belongs to the technical field of railway transportation safety, provides a railway contact net carrier cable tension online monitoring and early warning method and system, and aims at solving the technical problems that in the prior art, capturing is not comprehensive, and different environments are difficult to adapt. Acquiring a tension data stream by using a context awareness technique; analyzing the tension data flow by using a hidden Markov model to obtain a preliminary analysis result, processing by using a neural network, generating an abnormal mode recognition result, performing risk assessment by using a Bayesian network algorithm and a digital twin technology to obtain a preliminary fault estimation probability, and predicting a target fault estimation probability in combination with multi-context sensing data; a self-adaptive control algorithm is used for generating an adjusted alarm threshold value, when the monitored tension value exceeds the adjusted alarm threshold value, early warning information is generated in time, and processing is carried out through the block chain technology to obtain target early warning information; according to the technical scheme provided by the invention, the monitoring and early warning capabilities of the railway overhead line system carrier cable are comprehensively improved.

The invention relates to a water-drop-shaped captive balloon high-altitude wind power generation system. The water-drop-shaped captive balloon and kite cloth carried by the water-drop-shaped captive balloon are used for generating lift force to drive a ground power generator to generate power. The lift force generation mechanism is that the windward side and the wind resistance are increased by adjusting the pitch angles of the aerostat and the bearing kite cloth, and the wind resistance is converted into cable tension to drive power generation. A V-shaped pulley expansion mode is adopted to uniformly distribute tension of main and auxiliary cables, so that bag damage caused by non-uniform stress in a posture adjusting process is avoided; the captive balloon is provided with an attitude controller, communicates with a ground control system through wireless data transmission, adjusts the take-up and pay-off speed of a main cable and an auxiliary cable to control the pitching angle to achieve lift force control, and greatly improves the power generation efficiency. The main cable power output winch drives a generator to generate electricity through a one-way bearing, and the input end is connected with a motor through a clutch to achieve cable recovery. The backpack kite cloth can be controlled to open and close through a small winch to increase and decrease wind resistance; lift force and wind resistance control is optimized, the power generation efficiency is improved, safety is enhanced, operation is simplified, and maintenance is convenient.

The invention discloses a special-shaped steel pipe concrete pipe section hoisting dynamic pose control method, relates to the technical field of ocean engineering underwater pipeline installation, and mainly solves the problems of insufficient dynamic response and low space pose control precision when a special-shaped pipe section is hoisted in a complex water flow environment. The method comprises the steps that pipe section space pose design parameters are obtained, the pitch angle and the rolling angle of a pipe section are monitored in real time through an inclination angle sensor set, disturbance torque generated by real-time water flow force is calculated, sling length compensation amount is generated, and the take-up and pay-off speed of a chain block at each lifting point is independently adjusted; and meanwhile, adjusting mooring ropes moored on the two sides are pulled to control the horizontal rotation angle of the pipe section, the height of a lifting hook and tension of the mooring ropes are fed back and adjusted in cooperation with a floating crane positioning system, and finally accurate underwater in-position of the pipe section to the preset position of the seabed is achieved. The device is mainly used for hoisting and sinking operation of the special-shaped concrete filled steel tube section in the marine environment, water flow interference can be effectively resisted, and accurate butt joint and installation quality of a pipe section connector are guaranteed.

The invention relates to a negative Poisson's ratio metamaterial cell element structure based on a three-rod tension structure, which belongs to the field of mechanical metamaterials and comprises a three-rod tension integral structure component and a degree-of-freedom constraint component. Under the action of a three-rod nine-cable tension integral structure, when the structure is not subjected to external load, the structure is subjected to interaction of internal stress, and the balance is achieved in a self-stabilization state; and under the state of external load, the upper surface and the lower surface can generate a torsion effect, and the structure can recover to the initial state after the external load is removed again. The negative Poisson's ratio metamaterial cell element structure based on the three-rod tension structure has the advantages of self-adaptability, self-recovery, compression-torsion characteristic and the like. The tensegrity structure and the mechanical metamaterial structure are combined, the types of existing mechanical metamaterial cell element structures are enriched, and a brand new direction is opened up for design, analysis and application of the tensegrity mechanical metamaterial structure.

The invention provides an anomaly detection method and system based on Bi-LSTM and ST-GCN, and the method comprises the steps: constructing a space-time joint modeling frame for bridge health monitoring through the staged fusion of a bidirectional long-short time memory neural network (Bi-LSTM) and a space-time diagram convolutional neural network (ST-GCN) based on a point-line-plane three-stage detection mechanism for a tied arch bridge; the method comprises the following steps: extracting time sequence characteristics of a cable force meter through Bi-LSTM, identifying a single-sensor hardware fault, separating shared characteristics and sensor private characteristics from multi-sensor time sequence data, and enhancing sensor identity distinction degree and inhibiting interference factors such as temperature through decoupling comparison loss; the sensor private features are used as node features in an ST-GCN neural network, spatial positions among different sensors are identified by adopting a time attention mechanism through ST-GCN, spatial topological association and long-term time sequence dependence among the sensors are captured, and connection probability anomaly under a static adjacency relation is analyzed; and finally, the identified spatial position is analyzed and self-adaptive early warning is carried out, and a multi-node collaborative abnormal region is positioned through a connected domain algorithm, so that local damage and global abnormality are accurately positioned. The function of monitoring whether the bridge structure is damaged or not is achieved. Compared with a traditional machine learning database, more experimental parameters and a larger experimental data set are selected; the defect of low prediction precision of traditional machine learning is avoided, and the method has very high accuracy and reliability.

The utility model relates to the technical field of cable production, and discloses a tension adjusting device for cable production, two ends of a transverse frame of a support frame are respectively provided with a cable traction mechanism, a vertical frame of the support frame is provided with a lifting adjusting mechanism, and a lifting table of the lifting adjusting mechanism is provided with a cable tensioning mechanism. According to the utility model, by utilizing the horizontal traction of the traction roller in the cable traction mechanism and the butt clamping and limiting of the limiting roller, the tension traction work of cables with different thicknesses can be adapted, the on-site flexible adaptability is stronger, and when the tension traction is carried out, by utilizing the mechanical lifting and position correction of the lifting adjusting mechanism, under the elastic tension of the cable tension mechanism, the tension of the cables with different thicknesses can be adjusted. According to the cable tensioning and pulling device, real-time dynamic tensioning and pulling work can be conducted on a cable in the production and conveying process, the cable keeps proper tensioning performance to be conveyed and produced, the elastic buffering performance is better, and meanwhile the good self-adjusting tensioning adaptation performance is achieved.

The invention discloses a method and a system for rapidly measuring cable force of a stay cable based on a digital image correlation method. The method comprises the following steps: acquiring video data of the stay cable; a line segment measurement calibration method is adopted, stay cable texture points serve as feature points, and a feature point selection mechanism is established; establishing a pixel-physical space coordinate mapping model based on a redundant observation method; model parameters are calculated through a collaborative calibration method; performing displacement measurement based on a digital image correlation method; establishing a double-layer feature extraction mechanism to complete local and global feature extraction; weight distribution of the local features and the global features is dynamically adjusted through a weight adaptive fusion strategy; and finally, establishing a double-layer tracking and failure recovery mechanism to complete hierarchical collaboration of coarse-grained global tracking and fine-grained local tracking. And carrying out fast Fourier transform on the dynamic displacement measurement result, and calculating to obtain the cable force. And reliable technical support is provided for non-contact accurate calculation and measurement of the cable force.

The invention discloses a prediction model-based anchor mooring force prediction method for an immersed tube workboat. According to the method, water area environment characteristics, ship body posture characteristics, anchor mooring parameter characteristics and construction state characteristics are used as key data characteristics for predicting the anchor mooring force of the immersed tube construction ship; according to the method, an anchor cable tension prediction model is constructed, historical data, reduced scale physical model test data, numerical simulation data and short-term test data are subjected to data fusion to form a data set, and the model is trained and verified; and finally, predicting the tension value of each anchor mooring line on line by using the trained anchor mooring line tension prediction model. According to the method, the stress condition of each anchor mooring line can be predicted in real time under multiple working conditions (such as sinking, leveling, steering and self-storage states), and powerful support is provided for accurate positioning and safety control of installation and construction of the immersed tunnel.

The invention provides a ship offshore operation decision-making method, electronic equipment, a medium and a product. The ship offshore operation decision-making method comprises the steps of obtaining operation data of a ship; the operation data are input into a decision model, ship operation prediction information output by the decision model is obtained, a ship operation strategy is generated according to the ship operation prediction information, the decision model comprises a convolutional neural network, a recurrent neural network and an attention module which are connected in sequence, and hyper-parameters of the convolutional neural network are determined based on a preset optimization algorithm; the ship operation strategy comprises at least one of an operation time window, cable tension and posture adjustment. According to the method, the ship operation information in the future time period can be accurately predicted, so that targeted adaptive decision suggestions are quickly provided, the ship can flexibly deal with various complex and sudden offshore operation conditions, the decision efficiency is high, the decision is not influenced by personal experience and feeling, the occurrence of wrong decisions is effectively reduced, and the operation safety is improved.

The invention discloses a state monitoring method for a bridge structure, and belongs to the technical field of bridge measurement and monitoring, and the method comprises the steps: obtaining an original data set of the inclination angle of a bridge main tower and the tension of an inhaul cable, analyzing a signal time feature representation factor, and carrying out the linear interpolation adjustment information judgment; and based on the original data set, analyzing an inhaul cable tension update value, then analyzing an inhaul cable tension residual error and an interpolation adjustment effect label, and carrying out signal reconstruction effect judgment. According to the method, the bridge structure can be continuously monitored, linear interpolation adjustment information is carried out by analyzing signal time characteristic characterization factors, whether adjustment is carried out or not is judged, calculation power waste is avoided, and the inhaul cable tension is aligned with a main tower inclination timestamp by analyzing inhaul cable tension update values through linear interpolation adjustment. A stay cable tension update value is analyzed to eliminate a cross-sensor clock asynchronous error, signals are classified by analyzing a frequency coherence factor, mutual interference of different frequency components in broadband signals is avoided through classification processing, and the structural health monitoring precision is remarkably improved.

The invention relates to the technical field of bridge engineering construction, in particular to a bridge girder hoisting system and a positioning method.The system collects position information in real time through Beidou positioning terminals of all hoisting points on a hoisting frame, cable force is monitored through pin shaft type force sensors, and after the position information is processed through a Beidou differential service system and a control center, the cable force is transmitted to a main girder hoisting system; and the winch is regulated and controlled to act and early warn abnormity. The positioning method comprises the steps of equipment installation, data acquisition, coordinate calculation, data processing and intelligent regulation and control, millimeter-level positioning achieved through Beidou difference, and lifting point height difference control through double-cable force monitoring and closed-loop control. The invention aims to solve the problems of unbalanced components and potential safety hazards caused by low measurement precision, asynchronous hoisting point displacement and large cable force monitoring error in traditional bridge girder hoisting.

The invention provides a stay cable force recognition method based on frequency multiplication relation global optimization, and the method comprises the steps: recognizing a plurality of candidate frequencies through spectrum analysis based on stay cable vibration acceleration data collected in real time; the candidate frequency set is input into a fundamental frequency solving model, the sum of squares of frequency multiplication rounding deviation of each frequency and an approximate fundamental frequency is minimized through an optimization algorithm, and the approximate fundamental frequency is an optimization parameter for global search of the optimization algorithm; and determining a final fundamental frequency according to the solved approximate fundamental frequency, and outputting the cable force.

The invention discloses a polyethylene fiber cable tension test tool, and relates to the technical field of cable tests, the polyethylene fiber cable tension test tool comprises a base, the upper end of the base is fixedly provided with a bottom plate, one side of the bottom plate is fixedly provided with a telescopic piece, and the end part of the telescopic piece is fixedly provided with an adjusting assembly; the tension test is performed on the cable at different angles through the adjusting assembly; according to the tension test tool for the polyethylene fiber cable, when the swing block is stressed to rotate, the push plate rotationally mounted at the end part of the swing block is synchronously driven to move, a movable groove is formed in the end part of the movable plate, and the inner wall of the movable groove is in sliding connection with the outer surface of the lower end of the limiting block; and the outer surface of the positioning plate is in sliding connection with one side of the limiting block, so that when the swing block rotates, the positioning plate and the limiting block are driven to move on the inner wall of the movable groove until the positioning plate reaches the optimal position.

The invention relates to the technical field of cable testing, and discloses a tension testing device for cable processing, which comprises a rack, and a moving frame is slidably connected outside the rack; the lifting mechanism is mounted on the rack to drive the moving frame to move on the rack; the fixed pulley block is mounted at the top of the rack, and the fixed pulley block comprises a plurality of fixed pulleys which are symmetrically arranged; the two testing mechanisms are symmetrically arranged, the testing mechanisms are installed in the moving frame, each testing mechanism comprises a stretching assembly and two clamping assemblies which are symmetrically arranged, and the clamping assemblies are symmetrically arranged at the two ends of the stretching assembly; the testing mechanism further comprises a driving assembly, the driving assembly drives the stretching assembly to stretch the cable, the cable tension testing device can flexibly and randomly select tension testing objects for the cable, and the quality difference of different positions of the whole cable is comprehensively reflected.

The invention relates to a fault identification and fault-tolerant control device for controlling the cable allowance of an optical cable laying ship. The device comprises a fast fault identification module, a slow fault confirmation module and a fault-tolerant control instruction output unit. The rapid fault identification module predicts and generates candidate fault states based on the cable tension, the second derivative of the water depth, the model residual abrupt change and the tension trend; the low-speed fault confirmation module further performs stability confirmation on candidate fault states through filtering trend judgment, combined information entropy analysis and a multi-cycle consistency voting mechanism; the fault-tolerant control instruction output unit comprises a multi-model control subunit, a sliding mode control subunit and a finite time domain prediction subunit, and can fuse three types of control strategies to generate a fault-tolerant adjustment instruction after a fault is confirmed, thereby achieving the dynamic optimization control of the speed of the cable winch. According to the method, the cable allowance can be accurately controlled under complex sea conditions and topographic conditions, and the method has the capability of rapidly identifying abnormal states and dynamic fault tolerance.

The invention provides a cable tension testing machine, and belongs to the technical field of cable testing. Comprising a bottom plate and an electric control cabinet installed on the bottom plate, the left side and the right side of the upper surface of the bottom plate are fixedly connected with a left side plate and a right side plate correspondingly, two sliding rods are fixedly connected between the left side plate and the right side plate, and the left side and the right side of the outer surface of each sliding rod are slidably sleeved with a first movable block and a second movable block correspondingly; and a tension sensor is mounted between the left side of the first movable block and the left side plate. The end part of the cable is fixed, then the cable is wound on the outer surface of the winding column, so that the clamping assembly does not need excessive pressure, the cable is prevented from being damaged, the wound cable is limited by the mounting disc and the pressing disc through the pressing assembly, the fixing effect can be improved during testing, and the testing efficiency is improved. Meanwhile, the cable is wound on the outer sides of the guide wheels on the left side and the right side to form a straight line, the stress direction is not inclined during testing, and therefore the accuracy of the cable tension testing result is improved.

The invention provides a stay cable tensioning process simulation optimization design method and system based on finite element analysis, and the method comprises the steps: building a finite element model of a tower beam structure of a target cable-stayed bridge; the target cable-stayed bridge is a cable-stayed bridge constructed by a support method and provided with asymmetric leaning towers; based on the finite element model, stay cable tension process simulation of the tower beam structure under different jump tension sequences is carried out, and time-varying mechanical response of the tower beam consolidation system is obtained; and according to the time-varying mechanical response, the cable force effectiveness and the tower beam deformation continuity are taken as targets, a tension sequence is optimized through a multi-point coincidence approximation strategy, and simulation design of automatic iterative optimization is carried out. According to the stay cable tensioning process simulation optimization design method and system based on finite element analysis, the optimal jump tension sequence is solved in the simulation model, the evolution amplitude of the stress behavior of the tower beam in the stay cable tensioning bridge forming process is reduced, the evolution smoothness of the stress behavior is improved, and the phenomena of hard sudden change, discontinuity and even internal damage are prevented.

The invention discloses a prestressed anchor cable tension stress compensation device and a construction method, and relates to the technical field of anchor cable tension. The compensation problem is solved; the structure specifically comprises a concrete cushion layer, a fixed end is arranged on the inner wall of the concrete cushion layer, a plurality of anchor cables are limited on the inner wall of the fixed end, a hydraulic force application mechanism is arranged on one side of each anchor cable, and a limiting lock catch is arranged on the outer wall, located on one side of the hydraulic force application mechanism, of the fixed end; the axis of the anchor cable, the axis of the fixed end and the pulling force direction of the hydraulic force application mechanism are parallel and all perpendicular to the bearing face of the concrete cushion layer, the hydraulic force application mechanism comprises a shell fixed to the bearing face of the concrete cushion layer and a hydraulic oil cylinder fixed to the inner side of the shell, and the inner wall of the hydraulic oil cylinder is in sliding fit with a hydraulic piston. Graded tensioning and regulation of the pre-stressed anchor cable can be achieved, the final pre-stress is compensated before pre-stress construction is finished, and the situation of stress loss can be effectively avoided.

The invention belongs to the field of material science and metamaterials, and particularly relates to an internal stress self-loading two-rod two-cable tension characteristic negative poisson ratio metamaterial structure which comprises an internal stress self-loading two-rod two-cable tension metamaterial cell element structure and a rotating hinge. The two-rod and two-cable tensioning metamaterial cell element structure capable of automatically loading the internal stress comprises a rigid shell part, a T-shaped rod piece, a pressed elastic assembly, a tensioned elastic assembly and a hydrogel driving assembly. The characteristics of self-stabilization, self-recovery, self-adjustment and the like of the overall tensioning structure are combined, the unique deformation mechanism of the negative Poisson's ratio material is reserved, the local stress concentration effect of a traditional material is overcome, the limitation that the tensioning structure depends on external loading internal stress is broken through, the energy absorption, shock absorption, impact resistance and other performance of the negative Poisson's ratio material are improved, and the tensile strength of the negative Poisson's ratio material is improved. The method is expected to be developed vigorously and can realize application value in multiple fields.

The invention discloses a mountain freight cableway bearing cable tension intelligent regulation and control construction method and system, and relates to the technical field of intelligent regulation and control construction, and the method comprises the following steps: constructing a propagation chain model of tension disturbance in a space structure based on first data; according to the second data of each support node, dynamic response characteristics of tension disturbance of the bearing cable are extracted, and a feedback mapping model of the support nodes is established; simulating tension disturbance at the control node, and dividing the boundary of the regulation and control region by combining the characteristics of each region in the propagation chain model; according to the regulation and control region boundary, constructing a disturbance prediction model, and outputting tension disturbance trend prediction of each regulation and control region; and generating a regulation and control strategy based on disturbance trend prediction, and feeding back a regulation and control result in real time. According to the method, by establishing a multi-node tension disturbance propagation modeling, regional feature division and linkage regulation mechanism, the problems that accurate response of cableway tension regulation in a complex mountain environment is difficult to achieve, and disturbance risks are prone to cross-regional diffusion are solved.

The invention relates to the field of stranding machines, in particular to a cable tension control stranding device which comprises a base, a stranding motor is fixedly arranged at the upper end of the base, rotating frames are fixedly arranged on the two sides of the upper end of the base, the output end of the stranding motor is connected with a stranding shaft through a transmission belt, and the stranding shaft is rotationally installed in the rotating frames. One end of the stranding shaft is fixedly connected with a wire spool, the wire spool is fixedly connected with a first tensioning disc through wire winding shafts which are uniformly distributed in the circumferential direction, each wire winding shaft is rotatably provided with a wire winding roller, the first tensioning disc is fixedly connected with a second tensioning disc through a boss, and a tensioning assembly is arranged in the boss. According to the tension control device, tension control and adjustment in the cable conveying process are achieved through the distance change of the tensioning wheels, leakproofness in the cable twisting process can be improved, meanwhile, the tension degree of the cable can be visually fed back according to the monitoring value of the tension, and the situation that the cable is broken due to too large tension is avoided.

The invention discloses a pulling and lifting cable frequency detection and cable force measurement method and system based on a millimeter wave radar, and belongs to the field of pulling and lifting cable force measurement. The method comprises the steps that vibration signals are collected through the millimeter wave radar to obtain complex data streams, time-frequency analysis is conducted on the complex data streams, and an interference model is established; the method comprises the following steps: reconstructing a noise-reduced vibration signal by adopting adaptive filtering, extracting candidate vibration frequencies through power spectral density estimation and spectral peak detection, calculating corresponding stability scores, and obtaining a first verification factor used for evaluating wind disturbance and a second verification factor used for evaluating vibration frequency deviation; according to the method, through multi-source sensing data fusion and self-adaptive signal processing, complex environment interference is effectively overcome, non-contact high-precision cable force measurement is achieved, and the method has the outstanding advantages of being high in anti-interference capacity, high in measurement reliability and the like.

The invention discloses a high-pile wharf with a novel composite foundation self-adaptive collaborative structure, and relates to the technical field of novel structures of high-pile wharfs, the high-pile wharf comprises a foundation stress assembly and a load transmission assembly, and the foundation stress assembly comprises a cross-shaped connecting structure disc. The construction efficiency is improved, the construction period is shortened, the field operation difficulty is reduced through modular prefabrication, the comprehensive cost is reduced, the service cycle of the structure is prolonged through composite material concrete, the maintenance cost is reduced, replacement is convenient and disassembly is easy when the annual limit is reached through modular design, and the monitoring system can early warn structural abnormity in advance; the prestress of the inhaul cable is adjusted in time, data drive inhaul cable tension is dynamically adjusted, the structural damage rate under extreme loads is reduced, the prefabrication proportion of the suction barrel and the cross-shaped structure is large, the site construction period is shortened, the manual inspection frequency is reduced through real-time monitoring, and the operation and maintenance cost is reduced.

The invention provides an umbrella-like floating platform and a tensioning method thereof. The umbrella-like floating platform and the tensioning method are used for solving the problem that an existing floating platform is large in weight and high in manufacturing cost. Comprising a platform ring and a pressed ring which are arranged in parallel, and a plurality of side stand column buoys are vertically connected between the platform ring and the pressed ring; a central stand column is further arranged at the central axis of the platform ring and the pressed ring, the bottom end of the central stand column extends out of the lower end face of the pressed ring, and a plurality of first inhaul cables and second inhaul cables are arranged between the pressed ring and the top end and the bottom end of the central stand column respectively. The first inhaul cables and the second inhaul cables are arranged in an annular array mode along the central axis of the central stand column. By arranging the inhaul cables, the inhaul cable tension steel structure is pressed, a tension-compression balanced prestressed cable net system is formed, under the condition that the stress performance of the whole structure is kept unchanged, the steel consumption of the platform is remarkably reduced, the purpose of the lightweight structure is achieved, and then the manufacturing cost is reduced.

The invention discloses a suspended pouring construction method for a hanging basket of a cable-stayed bridge, belongs to the technical field of bridge construction, and aims to solve the problems of beam section linear deviation caused by deformation of a hanging basket system and bridge tower deviation caused by asynchronous tensioning of stay cables. Performing a staged loading preloading test to obtain elastic deformation data, calculating an anti-arch value based on the data, and dynamically adjusting the elevation of a bottom die platform; a layered pouring process is combined with a real-time deformation monitoring and compensation mechanism, and the accumulated deformation amount is controlled; the longitudinal prestressed steel beams are tensioned in stages, the symmetric tensioning process of the stay cables is synchronously implemented, and bridge tower deviation closed-loop correction is achieved through combination of a displacement sensor and a pressure sensor; in the moving process of the hanging basket, the gravity center offset is monitored, the balance weight is adjusted, and after full-bridge closure, the cable force of the stay cable is optimized in a staged mode to the design state. The method is suitable for large-span cable-stayed bridge girder construction, and high-precision linear control and stable structure forming are achieved.

The invention relates to the technical field of tension anomaly detection, and discloses a railway contact network carrier cable tension anomaly detection system and method, and the system comprises a threshold value determination module which is configured to determine an initial anomaly threshold value of a carrier cable to be detected based on an analysis result; the judgment module is configured to judge whether to optimize the initial abnormal threshold value or not according to the temperature characteristic value; the optimization module is configured to determine an optimization coefficient of the initial abnormal threshold value based on the actual wind load and the actual train operation load and obtain an optimization abnormal threshold value; and the abnormity early warning module is configured to compare the real-time tension value with the optimized abnormity threshold value, perform early warning on the to-be-detected carrier cable according to a comparison result, and obtain an early warning level. According to the invention, real-time monitoring and early warning of the tension state of the carrier cable of the railway contact network can be realized, and the detection efficiency and accuracy are greatly improved.

The invention discloses a parallel bunched cable strain clamp convenient to install, and aims to overcome the defect that in the prior art, a parallel bunched cable strain clamp is inconvenient to use. The technical problem is solved through the following technical scheme that the device comprises a first clamping plate and a second clamping plate which are arranged in parallel, and the two sides of the first clamping plate and the two sides of the second clamping plate are connected through parallel connecting assemblies; clamping block assemblies are arranged on the opposite surfaces of the first clamping plate and the second clamping plate and are arranged in the first clamping plate and the second clamping plate in a sliding manner; a connecting assembly is arranged on the second clamping plate. Most of the parts are assembled in advance, so that the use is very convenient, and the trouble of assembling in the mounting process is saved; and the first clamping plate and the second clamping plate are always kept parallel, so that the clamping force applied to the parallel bunched cable is more uniform, and an insulating layer of the parallel bunched cable is prevented from being damaged due to overlarge local clamping force of the parallel bunched cable.

The invention relates to a cable tension adjusting device on an electric power tower, and belongs to the technical field of overhead cable installation. The device comprises a tower frame and a cable, the front side and the rear side of the top of the tower frame are each provided with a first limiting wheel and a second limiting wheel which are used for supporting the cable in a rolling mode, and an automatic tension adjusting mechanism used for adjusting the tension of the cable is correspondingly arranged between each first limiting wheel and the corresponding second limiting wheel. The automatic tension adjusting mechanism comprises a sliding plate, a fixing plate, a sliding rail, a pulley A, a traction wheel, a pulley B, a pulley C, a pulley D and a cable, a pulley groove of the traction wheel is clamped above the cable, and the vertical pressure applied to the cable by the traction wheel is larger than the gravity of the counterweight assembly through a pulley block formed by the pulley A, the pulley B, the pulley C and the pulley D. The device is simple and reliable in structure and easier to implement.