1135 results about "Cable line" patented technology

The invention discloses a cable fault accurate positioning system based on an intelligent sensor system, and relates to the technical field of power fault positioning, and the cable fault accurate positioning system comprises a cloud monitoring center which is in communication connection with the following modules: a signal acquisition and processing module which is used for deploying the intelligent sensor system along a cable, operation environment data and traveling wave signals in the cable operation process are obtained, and the signals are preprocessed and stored in a cloud data warehouse. According to the invention, the front band-pass filter and the self-adaptive trap filter are combined to filter out high-frequency harmonic waves and specific-frequency interference signals, and the differential sampling technology is adopted to counteract common-mode interference, so that the signal-to-noise ratio of the signals is remarkably improved, a system can accurately capture and process weak traveling wave signals caused by a high-resistance grounding fault in a complex environment, and the fault detection accuracy is improved. Therefore, the fault positioning precision is greatly improved, the positioning error caused by signal interference is reduced, and the determination of the fault position is more reliable and accurate.

The invention relates to the technical field of cable line operation and maintenance, in particular to a cable fault diagnosis method and system based on quantum optimization variational mode decomposition and multi-scale evaluation, and the method comprises the steps: employing a quantum genetic algorithm to optimize the modal number and penalty factor of variational mode decomposition through a multi-target fitness function; constructing a multi-scale evaluation system fusing time domain, frequency domain and wavelet domain features, and screening an optimal modal component; and carrying out multi-feature fusion wave head calibration on the optimal modal component to calibrate the arrival time of the wave head, and realizing accurate positioning of a fault point in combination with a double-end traveling wave method. According to the method, the ranging error can be effectively reduced under the conditions of high transition resistance and low signal-to-noise ratio, the robustness and engineering applicability of cable fault diagnosis are improved, and the problems of attenuation distortion of fault traveling wave signals and difficulty in wave head calibration under the conditions of strong noise and high transition resistance are solved.

An aircraft wing having a fixed wing and a moveably mounted wing tip device is disclosed. A first cable harness and a second cable harness which are received in a protective sleeve extend between the fixed wing and the wing tip device. The protective sleeve is in a secured configuration in which at least two opposing parts of the protective sleeve are secured together between the first cable harness and the second cable harness to provide the sleeve with a first channel in which the first cable harness is received a second channel in which the second cable harness is received, and a webbing region extending between the first channel and the second channel such that the first and second cable harnesses are held apart by the webbing region.

The utility model relates to a cable stripping device for electric power engineering. Comprising a second mounting frame and a first mounting frame, and a clamping assembly is mounted on the first mounting frame; the clamping assembly comprises two sets of clamping jaw mechanisms and further comprises a clamping driving mechanism. A plurality of groups of sliding guide rods are fixedly connected to the second mounting frame, and a movable frame structure which is in sliding connection with the second mounting frame is arranged on the second mounting frame in a penetrating manner; a cutting assembly is mounted on the movable frame structure; the cutting assembly comprises a cylindrical shell structure, two groups of cutting mounting rods are elastically mounted in the cylindrical shell structure, a peeling cutter is mounted at the outer end part of each cutting mounting rod, and a limiting plate is mounted at the outer end part of each cutting mounting rod; the cutting adjusting mechanism is used for adjusting the distance between the two groups of cutting mounting rods; and an annular cutting driving assembly is mounted on the movable frame structure. According to the utility model, rapid girdling and peeling operation can be carried out on cables with different diameters, the cutting depth of the cutter can be adjusted according to the specifications and dimensions of the cables, the universality is strong, the peeling effect is good, and the cable girdling and peeling device has the advantages of convenient operation, time and labor saving, and wide application range.

The invention discloses a ring main unit cable line fault positioning system and method based on traveling wave intelligent sensing, and relates to the technical field of ring main unit cable line fault positioning, and the method comprises the following steps: arranging a traveling wave sensor at a position corresponding to a cable connecting plug or a solid-sealed polar pole in a ring main unit; an initial correction stage is carried out, a known electrical event is triggered on a cable in actual operation, the propagation time of a traveling wave signal between the two ends is measured, and the wave velocity of the traveling wave is actually measured on site and dynamically updated in combination with the known cable length; the method comprises the following steps: executing initial correction under different operation conditions, collecting corresponding data of working conditions and wave velocities, constructing a self-adaptive model of the wave velocities and working condition parameters, and when a fault occurs, dynamically predicting the wave velocities based on the constructed model according to current working condition parameters monitored in real time; and on the basis of the identified wave head timestamp, constructing an overdetermined equation set and solving an optimal fault position, so that the cable line fault positioning of the ring main unit is realized.

The invention relates to the technical field of cable line operation and maintenance, in particular to a cable fault accurate positioning method and system based on electromagnetic time reversal correction. And in combination with a reflection coefficient correction and local energy extraction method in a time inversion process, the problems that the fault traveling wave signal is attenuated and distorted under strong noise and high transition resistance, and the EMTR positioning effect is influenced by fault resistance are solved. Constructing a multi-scale evaluation system fusing time domain, frequency domain and wavelet domain features, and screening an optimal modal component; and constructing an actual fault resistor in a reverse phase of the EMTR to correct a reflection coefficient, and providing a criterion for positioning by using local energy at a first traveling wave to realize accurate positioning of a cable fault. According to the method, the ranging error can be effectively reduced under the conditions of high transition resistance, low signal-to-noise ratio and unknown fault resistance, and the robustness and engineering applicability of cable fault diagnosis are improved.

The invention relates to a DAS signal positioning method based on adaptive tensor decomposition and dynamic correction. The method comprises the steps of converting phase difference data into strain rate data, constructing a three-dimensional tensor based on a time domain signal of a space point, solving an optimization problem after constraint modeling, and extracting a de-noised DAS signal. Calculating an initial fault position, and calculating an actual optical path and an apparent position after temperature change based on a thermal expansion effect and a thermo-optic effect; and a dynamic correction algorithm is set, a system coordinate reference is adaptively calibrated, and a final positioning result is calculated. According to the method, original signals are separated into a low-rank background field, a sparse event field and a structured noise field through unsupervised tensor decomposition, and the defects of dependence on labeled data and insufficient complex noise separation are overcome; by establishing a temperature-optical path coupling physical model and a dynamic correction algorithm for real-time cross-correlation calibration, positioning drift caused by environmental factors is accurately compensated, and high-fidelity denoising and accurate positioning of cable line events in a complex environment are realized.

The utility model relates to the technical field of split type encoders, in particular to a split type photoelectric angle encoder and a matched tool, the reading head of the encoder and the end face of a grating disc are respectively provided with at least two positioning pin holes, and a photoelectric module in the reading head is mechanically limited through a groove. The cable is combined and fixed through the positioning ball and the wire harness binding belt, so that the use of a structural adhesive in the production process is reduced, the production cost is reduced, and the production efficiency and the maintainability and interchangeability of the product are improved. In the debugging process before leaving the field, the positions of the reading head and the grating disc are relatively fixed by using a matched tool, so that the problem that the positions of the reading head and the grating disc need to be subjected to secondary adjustment during use by a customer is avoided.

The utility model belongs to the field of cable production, and particularly relates to an oil passing device for environment-friendly cable production. A plurality of conveying devices are fixedly connected to the operation table; a pair of first supporting columns is fixedly connected to the operation table. The first supporting column is fixedly connected with a connecting column; the end parts of the pair of connecting columns are fixedly connected with connecting rings; the connecting ring is communicated with an oil conveying pipe; the oil conveying pipe is communicated with a plurality of oil spraying pipes; a cable core is arranged on the conveying device; the connecting ring is communicated with the oil conveying pipe, the oil conveying pipe is communicated with the plurality of oil spraying pipes, and when the insulating oil is injected into the oil conveying pipe, the insulating oil is sprayed out from the plurality of oil spraying pipes communicated with the connecting ring to perform oil passing work on the cable core, so that the insulating oil can be in full contact with the cable core; and the condition that the oil passing work of the cable core is affected due to insufficient contact between the insulating oil and the cable core during one-way spraying of the insulating oil is reduced.

The invention relates to a backflow cable state online monitoring method and system of a distributed master-slave architecture, and belongs to the technical field of backflow cable monitoring. The monitoring method comprises the following steps: receiving a pre-configured equipment topological relation table; controlling the slave equipment to generate an initial characteristic signal; scanning a current channel state parameter of the backflow cable, and dynamically selecting a communication bandwidth and a modulation mode; modulating the initial characteristic signal, generating a carrier characteristic signal and injecting the carrier characteristic signal into the backflow cable; controlling host equipment to receive the carrier characteristic signal on the backflow cable, and extracting an equipment ID and a current timestamp in the carrier characteristic signal; a first abnormal flag bit and a second abnormal flag bit are generated through comparison, and a comprehensive abnormal decision code is generated through fusion; and querying a logic association relationship in the equipment topological relationship table, determining a fault section identifier, generating a state report and uploading the state report to a remote monitoring platform. According to the invention, intelligent and non-contact real-time monitoring of the connection state of the backflow cable in the high-voltage cable line is realized.

The invention provides a cable line inspection path planning method based on Beidou positioning, and relates to the technical field of power cable inspection, and the method comprises the steps: inputting ground surface and infrastructure deformation data, cable state data and real-time meteorological grid data into a space-time geographic weighted regression model, and generating a dynamic risk field with a geographic grid as a unit; distributing an environment construction task to a mobile beacon cluster through a distributed contract network protocol based on multi-objective optimization; the inspection unit performs local obstacle avoidance and trajectory smoothing by adopting a fusion predictive control algorithm based on the guidance of the virtual inspection channel, and collects real-time sensing data; and comparing the real-time sensing data with an expected state in the digital twinborn model, and when the deviation exceeds a preset tolerance, triggering redeployment of the mobile beacon cluster and dynamic reconstruction of the virtual inspection channel. According to the invention, the risk can be accurately identified and quantified, so that a predictive inspection strategy is generated.

The invention relates to the technical field of unmanned aerial vehicle cable intelligent routing inspection, and discloses a GPS-free unmanned aerial vehicle cable autonomous routing inspection method based on laser radar SLAM, and the method comprises the steps: completing the initialization setting of a system through carrying a laser radar, an inertial measurement unit and an auxiliary sensor; starting a laser radar SLAM (Simultaneous Localization and Mapping) algorithm in an environment without GPS (Global Positioning System) signals to carry out real-time positioning and map construction, and generating an environment point cloud map; planning an autonomous inspection path and optimizing a flight path based on the point cloud map and the preset geographic information of the cable line; controlling the unmanned aerial vehicle to fly along the path, and updating the position in real time by using an SLAM algorithm to compensate the positioning error; synchronously acquiring laser point cloud data, visible light images and infrared thermal imaging data of the cable; identifying a cable structure and an abnormal state through multi-modal data fusion processing; and finally generating an inspection report containing the health condition and the abnormal position of the cable and transmitting the inspection report to a monitoring center. The continuity and coverage integrity of the routing inspection mileage are improved.

The invention relates to the technical field of cable fault diagnosis, in particular to an intelligent cable line fault diagnosis system, which comprises the following steps of: performing unified numbering, time alignment and difference elimination on multiple monitoring data such as a cable joint temperature value, a ground wire current level, a cable well water level height, a phase voltage current level and a sheath potential difference; a continuous and complete operation state sequence is formed, synchronous fusion of multi-dimensional abnormal features is realized, abnormal marks are mapped to the positions of a branch box and a cable well, a topological relation between nodes and roadsides is established, sorting is performed in combination with abnormal time, an abnormal propagation path is accurately described, and accurate coordinates of fault nodes are gradually converged. Through the determined coordinate information, in combination with the branch box number, the cable well number and the connector list, the disposal list containing the isolation point and the entry point location can be quickly generated, and the accuracy of fault diagnosis, the positioning precision and the disposal timeliness are improved.

The invention provides an optical fiber detection method and system for an optical time domain reflectometer, and relates to the technical field of power grids. According to the invention, the multi-wavelength backscattering signal of the optical fiber link to be detected is acquired, preprocessed and converted into the sample to be detected containing the multi-wavelength one-dimensional waveform data and the multi-wavelength two-dimensional diagram data at the same time, so that the sequence characteristic of the light intensity of each wavelength changing along with time is reserved; and spatial features of correlation and structural information between wavelengths can be reflected through data conversion construction, and multi-dimensional and structured representation of optical fiber events is realized. And combined analysis and recognition are carried out by combining a fault recognition model, and a time sequence rule in a one-dimensional waveform and a spatial distribution mode in a two-dimensional diagram are cooperatively mined, so that deep fusion and intelligent analysis of optical fiber fault spatial-temporal characteristics are realized, and the recognition capability of a complex fault mode is improved. The technical problem of low accuracy of optical fiber fault detection with a single wavelength at present is solved, and the accuracy and reliability of optical cable line fault detection are improved.

The utility model discloses an electronic communication cable cutting device which is characterized in that the upper surface of a cutting table is fixedly connected with a fixed rod, the interior of the fixed rod is movably connected with a movable rod, the surface of the upper end of the movable rod is fixedly connected with a movable table, and the upper surface of the movable table is fixedly connected with an electric hydraulic rod; the output end of the electric hydraulic rod penetrates through the fixing table and is fixedly connected with a first shearing blade, a guide plate is arranged on the upper surface of the cutting table, the second shearing blade is embedded in the surface of the guide plate, a fixing block is fixedly connected to the side face of the cutting table, and an electric telescopic rod is fixedly connected to the inner side face of the fixing block. And the output end of the electric telescopic rod is fixedly connected with a clamping plate, a guide wheel is arranged on the surface of the front end of the cutting table, the situation that the cable deviates in the moving process, and consequently notches of the cable are irregular when the cable is cut is avoided, and the practicability and adaptability of the cutting equipment are improved.

The application discloses a high-temperature-resistant cable core for aerospace, a cable and a preparation method. The cable core comprises an insulated conductor and an insulating mica tape wrapped outside the insulated conductor, the insulated conductor comprises a conductor core and a first insulating layer wrapped outside the conductor core, and the insulating material of the first insulating layer comprises the following raw materials in parts by weight: 30-50 parts of organic silicon resin, 20-40 parts of inorganic powder and 5-10 parts of solvent. The high-temperature-resistant cable for aerospace can improve the insulation performance and softness of the cable, prolong the high-temperature-resistant time of the cable and has good friction resistance.

The utility model belongs to the technical field of charging piles, and particularly relates to a wall-mounted alternating current charging pile convenient for wire harness storage, which comprises a charging box and a charging gun, a wire arrangement device is arranged at the bottom of the charging box, and the wire arrangement device comprises a storage mechanism and a dustproof mechanism. The storage mechanism comprises a mounting frame, a three-way guide rail, a convex sliding block, a reel, a locking plate and a locking bolt, and the dustproof mechanism comprises a dustproof cover, a self-locking sliding rail, a sliding block, a first magnetic attraction block and a second magnetic attraction block. According to the wall-mounted alternating-current charging pile convenient for wire harness storage, when cables are arranged, the cables can be directly wound on a winding wheel, so that the cables are prevented from falling on the ground disorderly, meanwhile, in the wire arrangement process, a locking bolt can be unscrewed, and then the winding wheel is pushed to drive a convex sliding block to slide in a three-way guide rail, so that the cables can be conveniently arranged, and the cable arrangement is convenient. Therefore, the distance between the two winding wheels is adjusted, and the number of winding turns can be adjusted according to the length of the cable.

This invention discloses a method and system for cable line condition assessment and maintenance decision-making, relating to the field of power system technology. The method includes: acquiring cable condition data and determining missing data information; the missing data information includes the location and type of the missing data; based on the missing data information, employing a corresponding data completion strategy to complete the cable condition data, obtaining completed values ​​and corresponding uncertainty indicators; inputting the completed values ​​and corresponding uncertainty indicators into a pre-constructed fault prediction model to obtain the cable's fault probability and confidence interval within a specified future time window; and determining the optimal maintenance strategy based on the fault probability. This invention enables accurate assessment and scientific decision-making regarding cable line conditions even with incomplete information.

The utility model discloses a cable terminal, including the terminal body, be equipped with the connector on the terminal body, the inside of terminal body is equipped with cable line, the terminal body is equipped with the fixed assembly that can conveniently cable line is fixed, the fixed assembly includes through -hole, through -hole, bolt, gasket and nut, the through -hole is set up on the terminal body, the through -hole is set up on the cable line, the bolt is located the inside of through -hole and through -hole, the gasket is set up on the bolt, and is located the below of terminal body, the nut is set up on the bolt, and is located the below of gasket. The utility model discloses technical scheme can make cable line conveniently reach the stable fixed effect with terminal body.

The utility model relates to the technical field of a plug bending test clamping mechanism for a high-speed signal transmission cable, in particular to a plug bending test clamping mechanism for a high-speed signal transmission cable, which comprises a wire rod swing testing machine, and a support frame is mounted on a base of the wire rod swing testing machine. A weight guiding clamp is installed between the bottoms of the inner side faces of the supporting frames, and a distance adjusting mechanism used for adjusting the distance between weights and a height adjusting mechanism capable of stably adjusting the height of the weight guiding clamp are installed on the weight guiding clamp. According to the utility model, the distance between the two corresponding weights on the weight guide clamp can be adjusted through the distance adjusting mechanism, so that the device can adapt to cables with different thickness degrees, and meanwhile, the height of the weight guide clamp can be stably adjusted through the height adjusting mechanism; therefore, the problems that a traditional weight guide clamp moves up and down from the two ends and is difficult to operate by a single person and inclines are effectively solved.

The application discloses an artificial intelligence-based high-voltage cable temperature monitoring system, relates to the technical field of high-voltage cable monitoring, and aims at solving the problems of low prediction accuracy, lack of multi-factor interaction analysis, incomplete fault evaluation and untimely early warning in the existing high-voltage cable temperature monitoring. The data acquisition module is used for collecting multi-source monitoring data of the high-voltage cable in real time, storing and sending; the data preprocessing and fusion module is used for receiving the multi-source monitoring data, preprocessing the multi-source monitoring data, and screening out an effective feature data set through correlation analysis; the intelligent temperature prediction module constructs a neural network prediction model based on the effective feature data set, realizes accurate prediction of the core temperature, surface temperature and joint temperature of the high-voltage cable, and outputs a temperature prediction result. The application has the advantages of high temperature prediction accuracy, strong real-time performance, multi-dimensional data fusion and interaction analysis, comprehensive and quantitative accurate fault risk evaluation, timely early warning, strong operation pertinence, strong system compatibility and high scalability.

The utility model relates to the technical field of cables, and discloses a rapid exposed cable, which comprises a conductor, an insulating layer is wrapped outside the conductor, an inner sheath is wrapped outside the insulating layer, a steel tape armor is wrapped outside the inner sheath, an outer sheath is arranged outside the steel tape armor, and the outer sheath is wrapped outside the outer sheath. A position-adjustable fixing structure is arranged on the lower side of the outer sheath, and during use, the bottom end of the outer sheath is fixedly connected with a first fixing seat, two sets of sliding grooves are formed in the bottom end of the first fixing seat, the bottom end of the first fixing seat is movably connected with a movable seat, and two sets of buckles are fixedly connected to the top end of the movable seat; the outer size of the buckle is matched with the inner size of the sliding groove, the buckle can move front and back in the sliding groove, the bottom end of the movable base is fixedly connected with a foam double-faced adhesive tape, the foam double-faced adhesive tape is pasted on the supporting face after the protective belt is torn open, and a user can select multiple sets of movable bases according to the length required by the user. Therefore, cables with different lengths can be flexibly fixed.

The utility model provides a novel cable line endurance detection equipment, including the bottom die for bearing the detection piece, set in the upper cover plate of bottom die, the pull plate assembly that goes down by pulling the upper cover plate to press tightly fixed detection piece on the bottom die, the rotary drag mechanism of rotary drag action to the cable line of detection piece. The novel cable line endurance detection equipment passes through setting bottom die, upper cover plate, pull plate assembly and rotary drag mechanism, so that can carry out rotary drag action to the cable line of detection piece, compares with manual drag mode among the prior art, has reduced the labor intensity, has also promoted the detection efficiency.

This invention discloses a cable winding device for easy quantitative cutting, comprising a cable coil, a worktable, a straightener, and a cutting table. It also includes a guiding component, a winding component, a bundling component, and a collecting component. The cable coil is located at the front end of the worktable. The straightener is fixedly installed at the upper end of the worktable. The cutting table is fixedly installed behind the straightener. The guiding component is fixedly installed behind the worktable. The winding component is connected to the rear end of the guiding component. The bundling component is connected to the lower end of the winding component. The collecting component is fixedly installed at the rear end of the winding component. This invention solves the problems of unreliable cable connection between the clamping mechanism and the winding mechanism, and the low efficiency caused by the need for manual assistance in the winding, bundling, and unloading processes in existing technologies.

The embodiment of the invention discloses a method and system for monitoring a surrounding roadway loosening circle based on high-density resistivity, and the method comprises the steps: collecting roadway surrounding rock resistivity data through a high-density resistivity electrode array, and enabling the high-density resistivity electrode array to be connected with an electrode and a cable through a magnetic attraction fixing clamp; encoding the resistivity data through a wireless signal transmitting device to obtain resistivity encoded data, and transmitting the resistivity encoded data to a measurement and control host; and based on the measurement and control host, calculating the range of the surrounding roadway loosening circle through a preset loosening circle prediction model, and generating early warning information at the same time. A magnetic attraction fixing clamp connection mode is adopted, the reliability of connection between the electrode and the cable is improved, measurement errors caused by poor contact are reduced, wireless transmission is utilized, cable installation is avoided, the difficulty of monitoring operation of the loose circle in the roadway environment is reduced, and continuous monitoring and intelligent early warning of the roadway loose circle are achieved.

The invention belongs to the field of cable partial discharge monitoring, and particularly relates to a cable partial discharge positioning system. The invention provides a cable partial discharge positioning system, which comprises the following steps of: dividing different areas according to signal propagation characteristics of a cable line, arranging monitoring sensors at different intervals, and arranging calibration sensors at the abrupt change positions of the intervals; transmitting a reference UHF pulse signal through a calibration sensor, and calibrating time delay measurement data of an adjacent monitoring sensor; each monitoring sensor receives a discharge source signal of a discharge cable, and extracts signal time delay data after preprocessing; time delay data of multiple monitoring sensors and cable characteristic parameters are fused, and the position of a discharge source is calculated through a positioning algorithm. According to the cable partial discharge positioning system provided by the invention, on the basis of the maximum allowable spacing calculated by the time delay error-sensor spacing correlation model, the monitoring sensor spacing is determined in combination with the signal attenuation characteristics of the directly-buried section, and sparse deployment is realized.