220 results about "Cable network" patented technology

The invention relates to the technical field of cable testing, and discloses an electric wire and cable defect fault detection method and device, and the method comprises the steps: obtaining the burying trend information of a target cable and the test characteristics of a test item, analyzing and determining the position of a cable detection end point, deploying a corresponding detection instrument according to the position of the detection end point, and carrying out the detection. A plurality of tests including electric pulse reflection test, sheath grounding circulation test, infrared temperature measurement test and the like are carried out by using deployed instruments, multi-item test data of the cable are acquired, comprehensive analysis is carried out on the multi-item test data, defects and faults of the cable are accurately positioned, the accuracy and efficiency of fault positioning are improved, and the system can adapt to a complex cable network environment and is suitable for popularization and application. The method has high flexibility and practicability, and solves the problem that cable defects and faults are difficult to accurately position in the prior art.

The invention discloses an optical cable topology visualization monitoring analysis system and method, and relates to the technical field of optical cable monitoring. According to the optical cable topology visual monitoring analysis system and method, the complex dependency relationship between optical cable network equipment is accurately captured by using the graph neural network, and the wavelength division multiplexing, OTDR test and optical power measurement technologies are fused, so that online monitoring without interrupting service communication is realized, the real-time performance and efficiency of monitoring are improved, the positioning precision of optical cable broken fibers can be improved, and the optical cable topology visual monitoring analysis system and method are suitable for popularization and application. Through new and old OTDR curve comparison and big data analysis, optical fiber aging and degradation trends are pre-judged in advance, accurate active operation and maintenance are realized, the probability of optical cable fault occurrence is reduced, the reliability and stability of a network are improved, and by cooperating with visual display of a complex power grid optical cable map, the method has the advantages of high accuracy and high reliability. The topological structure and the geographic position of the optical cable are visually displayed by fusing multiple levels, clear visual information is provided for operation and maintenance personnel, and management and decision making are facilitated.

The invention discloses an intelligent cable fault positioning and diagnosing method and system based on double-end traveling waves, and relates to the technical field of cable fault positioning and diagnos.The method comprises the steps that monitoring systems are synchronously arranged at the two ends of a cable line, a self-adaptive signal adjusting mechanism is designed, and double-end data of a transmitting signal and a receiving signal are processed based on the double-end traveling waves; and constructing a topological structure model of the cable network by using the double-end traveling wave data features, training a fault point location by using a double-end data fault training model, and completing diagnosis of intelligent positioning of a cable fault. According to the invention, the problems of signal attenuation and noise interference are solved, the identification capability of a small partial discharge phenomenon is enhanced, the accurate positioning of a fault point in a complex multi-branch cable network is realized, the state of the cable network can be updated in real time, the method adapts to environmental changes, and the timeliness of a diagnosis result is ensured.

Systems and methods for cable inspection using optical fiber sensing includes a hardware processor and a memory storing a computer program which, when executed by the hardware processor, causes the hardware processor to collect data from a fiber optic cable and analyze the data with a distributed fiber optic sensing (DFOS) system. Losses and anomalies and their locations are identified in the cable. An alert is generated based on the losses and anomalies.

The invention discloses a cable three-dimensional modeling method and device based on a video stream and a key frame, and belongs to the technical field of three-dimensional modeling of power system cable equipment, and the method comprises the following steps: constructing a dynamic truncation symbol field based on camera video stream data, and extracting a cable surface grid; triggering key frame capture, and establishing a key frame database; performing multi-modal fusion on the video stream features and the key frame features to generate a cable deformable template; obtaining a first-order deformable template model based on the cable deformable template; constructing a staged multi-scale adversarial discriminator, and deploying convolution kernel optimization at different resolution levels to obtain a second-order deformable template model; performing covariance optimal registration on the scene point cloud reconstructed by the video stream and the second-order template point cloud to obtain a third-order optimization template model; and constructing a density sensing gradient field, and dynamically fusing the video stream and the key frame data to generate a cable three-dimensional scene model. According to the invention, the precision and real-time performance of cable network modeling in a complex environment are improved.

The invention provides a method and a system for predicting coordinates of free nodes of a cable net structure. The method comprises the following steps: acquiring prestress distribution of the cable net structure, coordinates of each boundary node and an optimized direction value of each free node; inputting each boundary node coordinate into a deep learning shape finding model, and outputting a coordinate prediction value of each free node; and calculating a loss function value of the deep learning form-finding model, adjusting parameters of the deep learning form-finding model to update the deep learning form-finding model until the loss function value is smaller than a set error, and obtaining a coordinate predicted value of each free node of the cable net structure. According to the method, the boundary node coordinates of the cable net structure serve as the input of the deep learning shape finding model, the optimized direction values of the free nodes are given, the deep learning shape finding model is used for predicting the free node coordinates of the cable net structure, the purpose of cable net structure shape finding is achieved, and compared with existing manual force finding, the calculation efficiency is high, and rapidness and accuracy are achieved.

The invention discloses a distributed cable fault traveling wave characteristic acquisition and positioning method, and relates to the technical field of cable faults, and the method comprises the steps: collecting traveling wave characteristic information through a branch point sensing unit, and sharing the collected traveling wave characteristic information through a communication network; constructing a dynamic topology awareness and network reconstruction framework, wherein weighted averaging comprises the step of allocating weights to data sources based on a signal-to-noise ratio, a topology distance and time consistency; and establishing a propagation path model of the traveling wave signal in the distributed cable, and defining a cable fault position positioning coordinate by using a hyperbolic positioning rule in combination with the propagation path model. The distributed cooperation capability of the system is enhanced, the whole scheme has good expansibility and adaptability while improving the positioning precision, the method can be widely applied to fault monitoring and management of a large-scale distributed cable network, the troubleshooting time is effectively shortened, the troubleshooting cost is effectively reduced, and powerful support is provided for intelligent operation and maintenance of a power system.

A method and apparatus for detecting and locating a fault in a cable network. A cable modem may perform channel estimation to obtain a time domain channel response on an echo channel in a cable network. The cable modem then analyzes the time domain channel response to determine whether there is any change from a previously obtained time domain channel response on the echo channel. If there is a change from the previously obtained time domain channel response, the cable modem may generate an alert for a fault in the cable network and estimate a location of the fault based on the time domain channel response. Calibration may be performed to determine a reference latency for a reflection occurred inside the cable modem, and the location of the fault may be estimated based on the reference latency.

The invention discloses an optical cable network automatic monitoring system based on industrial equipment, which relates to the field of industrial automation and comprises a dynamic monitoring module, an abnormity repairing module, a structure analysis module, a cloud management platform module, an automatic alarm module, a safety guarantee module, an intelligent maintenance module and an expansion compatible module. Wherein the output end of the dynamic monitoring module is connected with the input ends of the abnormity repairing module and the cloud management platform module; the output end of the abnormity repairing module is connected with the input end of the structure analysis module; the output end of the cloud management platform module is connected with the input end of the automatic alarm module; the output end of the automatic alarm module is connected with the input ends of the intelligent maintenance module and the safety guarantee module; the output ends of the safety guarantee module and the intelligent maintenance module are connected with the input ends of the cloud management platform module and the expansion compatibility module; according to the method, the problems that a fault point cannot be predicted, a network topology structure cannot be automatically identified and optimized and the compatibility is poor in a traditional monitoring system are solved.

An intelligent monitoring and testing system for a cable network determines measurements for a cable plant (CP), including cable modems (CMs) and common network elements. Metrics determined from the measurements are analyzed to detect a service issue and a service sub-issue. Machine learning is applied to the metrics and other related data to determine an optimized workflow for diagnosing, locating, and remediating the service issue and service sub-issue.

The invention discloses a building energy-saving intelligent management and control method and system based on the Internet of Things, particularly relates to the technical field of intelligent building energy management, and is used for solving the problem that in the prior art, when building internal and external environment data are collected, resolution ratios of input data in the space-time dimension are not matched. The method comprises the following steps: acquiring Internet of Things sensor space-time distribution data of each area in a building; identifying space-time heterogeneity characteristics of data acquisition density and sampling frequency, and dynamically adjusting the sampling frequency of a low-frequency region; establishing a mapping relationship between the environmental parameters and the energy consumption parameters; traversing an instruction path and eliminating an inefficient instruction based on a conflict path weight; generating a regional differentiation energy-saving strategy and analyzing an electromagnetic interference distribution entropy value to insert an execution time difference; the optimized energy-saving strategy is executed; data acquisition optimization, energy consumption modeling precision and equipment instruction conflict resolution are realized, the reliability of an energy-saving strategy and the energy efficiency of the system are effectively improved, and the influence of electromagnetic interference on a building cable network is inhibited at the same time.

The invention provides a power distribution communication network optical cable fault prediction method and system based on machine learning. The method comprises the following steps: collecting Rayleigh scattering signals of a plurality of monitoring points along an optical cable; performing unsupervised learning on the optical cable adaptive reconstruction model, and calculating a reconstruction error matrix and an abnormal cumulative metric; constructing an optical cable network diagram, calculating a fault propagation probability matrix, predicting a future optical cable health index, and obtaining a future health index matrix; establishing an environment influence matrix, and adopting an optical cable environment adaptive filtering model; and based on the health index and the fault confidence coefficient matrix after filtering optimization, optical cable maintenance priority scores are calculated and sorted, and a self-adaptive inspection and maintenance strategy is formulated. According to the invention, high-precision monitoring, fault propagation prediction and environmental adaptability optimization of the health state of the optical cable are realized, and the intelligent level of operation and maintenance of the optical cable is improved.

The invention relates to the technical field of electric power, in particular to a cable accessory intelligent monitoring system based on multi-sensor fusion. In the scheme of the application, the preprocessing module performs preliminary data processing at the edge, so that the data transmission burden is reduced; the regional processing module can establish a dynamic communication group to realize efficient data interaction between nodes. And the dynamic communication group dynamically adjusts the communication link according to the actual operation condition of the cable accessory and the network state. When a new cable accessory is accessed or an existing accessory has a fault, the system can quickly complete the reconfiguration of a monitoring strategy and a communication link, ensures that the monitoring work is continuously and efficiently carried out, and effectively improves the adaptability and flexibility of the system in a dynamic change network environment. The regional processing module can perform cross-regional data fusion, considers cable operation characteristic differences in different regions, and integrates and analyzes data in a targeted manner. Therefore, the system can carry out fine management on a large-scale complex cable network and accurately identify associated faults among regions.

The invention relates to the technical field of optical cable route general survey, and discloses an optical cable route general survey method and device based on optical fiber vibration sensing, and the method comprises the steps: knocking at an optical cable pile point, and remotely controlling a pulse light source to send an optical pulse to an optical cable; collecting a vibration signal of the optical fiber, and dynamically adjusting the pulse width of the optical pulse; recognizing a knocking event in the vibration signal, and intercepting a knocking vibration fragment from the vibration signal; calculating characteristic parameters of the knocking vibration segment, and performing knocking feedback based on the characteristic parameters; calculating the optical cable length of the optical cable pile point, and recording latitude and longitude coordinates of the optical cable pile point; and determining the optical cable trend of the optical cable pile point through knocking, and drawing a routing diagram of the optical cable based on the latitude and longitude coordinates of the optical cable pile point, the optical cable length and the optical cable trend. According to the invention, the general survey efficiency of the optical cable route is improved, automatic drawing and visual display of the optical cable route are realized, and an optical cable network is convenient to manage and maintain.

A satellite cable laying operation platform relates to the technical field of satellite manufacturing, and comprises a platform main body, the platform main body comprises a bottom plate, two first side plates, two second side plates, a plurality of partition plates, a plurality of quick release positioning blocks and a middle beam, the bottom plate is rectangular, the two first side plates can respectively rotate around two short edges of the bottom plate, and the two second side plates can respectively rotate around two short edges of the bottom plate; the two second side plates can rotate around the two long edges of the bottom plate respectively, the partition plates are installed on the bottom plate, the quick-release positioning blocks are used for positioning the first side plates and the bottom plate when the first side plates are perpendicular to the bottom plate, and the middle beam is used for being arranged on the first side plates and the partition plates in a crossing mode. And the plurality of electrical interface simulation pieces are mounted on the platform main body and are used for laying cables. By simulating the satellite cabin environment and laying the cable, the wiring work in the satellite AIT link can be preposed, the reliability of the whole satellite cable network spatial layout can be verified in advance conveniently, the laid cable network can be directly used in the satellite AIT link in a component form, the satellite production efficiency is improved, and the satellite manufacturing period is shortened.

The invention discloses an aircraft cable network layout determination method, device and equipment, a medium and a product. The method comprises the following steps: receiving a cable network layout editing request, and determining aircraft connector information according to an electrical schematic diagram corresponding to a first aircraft; receiving a contact editing operation, and generating an aircraft contact distribution table according to the contact editing operation and the aircraft connector information; receiving a cable editing operation, and generating a cable information table corresponding to the first aircraft according to the cable editing operation and the aircraft contact distribution table; and in response to the layout information generation request, generating cable network layout information corresponding to the first aircraft according to the aircraft contact distribution table and the cable information table, so as to produce a cable network of the first aircraft according to the cable network layout information. According to the technical scheme, the effect of determining the cable network layout information in the aircraft based on the electrical schematic diagram of the aircraft is achieved, and the efficiency of determining the cable network layout information is improved on the basis of reducing the error rate of the layout information.

The invention discloses a large rope net antenna surface shape measurement and regulation method based on force-position fusion vision measurement, and relates to the field of antenna precision control and optimization. In order to solve the problems of high cost, high structural complexity and limited regulation and control precision of a measurement system in the prior art, the invention provides an efficient regulation and control method. The method comprises the following steps: acquiring displacement data of upper and lower cable net nodes and extension spring mark points, and recording images; preprocessing the image data, and extracting actual coordinates of the mark points; the actual coordinates are compared with the design coordinates, node displacement errors are calculated, and the root-mean-square error value of the antenna reflecting surface is obtained through a profile error formula; based on the root-mean-square error value, the deformation amount of a piezoelectric actuator and the deformation amount of a spring are calculated, and driving voltage and tension parameters are determined; and generating a control instruction according to a calculation result, and optimizing regulation and control. The method is suitable for design and maintenance of the spacecraft antenna, and has the advantages of high precision, low cost and easy operation.

The invention provides a method and a system for calculating initial prestress distribution of a cable net structure. The method comprises the following steps: acquiring coordinates of each boundary node and coordinates of each free node of the cable net structure; inputting each boundary node coordinate into a deep learning force finding model, and outputting a coordinate prediction value of each free node; calculating the sum of the mean square residual error of the physical balance equations of all the free nodes and the mean square error of the coordinate predicted value and the true value, namely a loss function value; adjusting parameters of the deep learning force finding model and the cable prestress according to the loss function value, updating the deep learning force finding model until the calculated loss function is smaller than a set error, and obtaining the cable prestress, namely the initial prestress distribution of the cable net structure. According to the method, the boundary node coordinates of the cable net structure serve as the input of the deep learning force finding model, the free node coordinates serve as the output, the initial prestress distribution of the cable net structure is found through the deep learning force finding model, and compared with existing manual force finding, the calculation efficiency is high, and rapidness and accuracy are achieved.

The invention belongs to the technical field of circuit detection, and particularly relates to a distributed photovoltaic power station cable fault positioning system and method.Detection equipment is started, a carrier signal is sent to a cable network, electromagnetic interference characteristics are recorded synchronously, the frequency of the carrier signal is systematically adjusted to avoid recognized interference, and the fault positioning accuracy is improved. And repeating the steps until a non-interference working frequency band is found, then monitoring the signal transmission condition step by step along a cable path, and analyzing a signal attenuation mode to accurately position a potential fault point. According to the method, the problem of misjudgment caused by electromagnetic interference generated by the frequency converter is effectively solved, the accuracy and reliability of fault detection are remarkably improved, the maintenance cost and time are reduced, and the operation and maintenance efficiency of a photovoltaic power station is improved. The improvement has remarkable technical effect and practical value in a complex electromagnetic environment.

The invention provides a cable-free network structure and an antenna system, and belongs to the technical field of communication. The cable-free network structure comprises a reflecting plate; the first phase shifting module comprises a power division phase shifting network and a corresponding first phase shifting medium group, the power division phase shifting network is provided with a first input port and a plurality of first output ports, the first input port is used for receiving signals, and the plurality of first output ports are used for outputting equal phase differences; the second phase shifting module comprises a plurality of two-way power dividers and corresponding second phase shifting medium groups, each two-way power divider comprises a second input port and two second output ports, the second input ports are connected with the first output ports, and the second output ports are used for sending signals; and the transmission mechanism respectively drives the first phase shifting medium group and the second phase shifting medium group to move at a preset displacement ratio so as to realize equal-phase-difference output in the same period. The cable-free network structure provided by the invention can simply realize equal-phase-difference output in the same period.

The invention discloses a parallel scheduling method of a large aircraft cable test system based on operation line simulation and an implementation mode thereof, and the parallel scheduling method comprises the steps: building a mathematical model based on the conditions of test task time sequence constraint, resource constraint and the like, and carrying out the search in a model solution space through a genetic algorithm; according to the method, chromosome coding is carried out on the basis of the test task execution starting moment, the natural organism survival process is simulated to seek an optimal solution, the instrument waiting defect in a static model is optimized, and the parallel sequence scheduling problem of a complex topology cable network test system on a large aircraft is effectively solved.

The invention provides a multi-stage combination automatic optimization method for a satellite three-dimensional cable network path, and the method comprises the steps: judging the membership of a cable binding support, a connector and a cabin plate through reading a satellite three-dimensional satellite model, and defining the attributes of a cabin penetrating hole and a cross-plate connection point; constructing a three-layer information table of a cable network, a cable bundle and a cable branch; selecting the longest different plate / same plate branch as a main branch according to cabin plates at the head end and the tail end of the branch; decomposing stage by stage according to the distribution of main and branch cabin plates, and performing path optimization by adopting a plate path optimization algorithm based on a Floyd algorithm, an intra-region path optimization algorithm and a region path optimization algorithm; the slave branch selects the nearest access point for optimization based on the main branch path; and circularly processing all the cable bundles to complete the path planning of the whole cable network. Therefore, automatic optimization of the three-dimensional cable network path of the satellite deck is realized, the problems of low efficiency and poor quality of manual design of a general module are solved, and the method is adaptive to a whole satellite and a multi-deck satellite with a single / multi-plane deck and has universality.

A system, such as a deflectometer (100), comprising a plurality of modular units (1; 206); a master controller (50); and a plurality of slave units including a first slave unit and a second slave unit; wherein each slave unit is interlinked with a corresponding modular unit (1; 206); and wherein a cabled bus network (22) connects the master controller (50) to the first slave unit and interconnects the first slave unit to a second slave unit. The master controller (50) automatically and dynamically keeps track of the physical position or at least the physical order of the slave units on the cabled network.

The invention discloses a vehicle-mounted adaptive multi-mode intelligent switching power supply system, and belongs to the electrical field. The system comprises a diesel generating set, a dual-power-supply automatic switching control box, an uninterruptible power supply, a power battery pack, an alternating-current power distribution unit, a direct-current power supply, a direct-current power distribution unit, an alternating-current switching box, a master control panel and a power supply and distribution system cable network. The diesel generating set is used as a standby power supply and is automatically switched with the mains supply through the dual-power-supply automatic switching control box; the uninterruptible power supply realizes alternating current conversion and battery inversion backup; the direct-current power supply provides low-voltage direct-current output; the alternating-current and direct-current power distribution units realize electric energy distribution and control; the alternating current switching box realizes single-path input and multi-path output; and the master control panel centrally controls the start, stop and on-off of the system. The system has the characteristics of multi-mode self-adaption, intelligent switching, fault self-recovery and high reliability, and is suitable for stable power supply of vehicle-mounted equipment such as a military command vehicle.

The invention discloses an electromagnetic compatibility design method for a low-orbit satellite system, and aims to solve the problems that the traditional design focuses on a single machine, measures are isolated, and complex electromagnetic interference of the low-orbit satellite system cannot be handled. The method comprises the following steps: S1, analyzing a system-level electromagnetic environment and requirements, determining parameters, and identifying an interference source and a coupling path; s2, providing a layered and graded electromagnetic compatibility framework including platform and load isolation, power supply interference suppression, satellite-borne cable network optimization and grounding system construction; s3, performing frequency resource and signal integrity management, planning a frequency spectrum, and optimizing a clock and a digital circuit; s4, providing a software anti-interference and fault-tolerant mechanism, and realizing data verification, instruction voting and state monitoring; s5, performing on-orbit electromagnetic compatibility prediction; and S6, carrying out ground test verification. According to the method, a full-link design system is formed, interference risks are avoided in advance, and the operation stability and data reliability of the satellite in a complex electromagnetic environment are improved.

The invention relates to the technical field of spacecraft design, in particular to an aircraft information flow analysis, recheck and recalculation system, which comprises an information large graph design module used for automatically extracting design data such as an interface data list and a cable network contact table, generating a static information large graph through data check and analysis, and supporting signal management, layered display and export; the model library construction module is used for constructing a hierarchical information professional model library based on a Modelica language and covering multi-level models from a basic library, a universal library to a model customization library; and the information flow simulation verification analysis module is used for mapping the static information large graph into a simulation model, carrying out dynamic simulation verification on a system network, a communication network and a load network, and realizing multi-dimensional visual display of a result. According to the method, the information system design is rechecked and recalculated from static state to dynamic state and from manual operation to automatic operation, and the design efficiency, accuracy and verification sufficiency are effectively improved.

Methods and systems provide a computer technologic enhanced experience to a user when the user visits an indoor environment. A method may include computer readable instructions for identifying and tracking the user in the indoor environment using an indoor positioning system. An indoor positioning system may include a leaky feeder cable network, a plurality of Wi-Fi access points and location tracking using triangulation and Tine-to-Flight calculations. Further, based on the tracking of the user, the user is provided with an augmented navigation route for navigating in the indoor environment. The optimized navigation route is displayed on a virtual 3D model of the indoor environment. Further, the method comprises providing augmented item list to the user while navigating in the indoor environment, such that the augmented item list is generated via the use of advanced analytics, AI / Machine learning capabilities and computer vision based machine learning model for object tracking and recognition.

The present application relates to the technical field of optical cable joint box fault identification, and a kind of optical cable joint box fault identification method and system based on remote positioning, comprising: constructing fault parameter detection system, obtaining optical cable joint box set and spare optical cable joint box set, extracting an optical cable joint box from optical cable joint box set in turn, and the following operations are executed to the extracted optical cable joint box: obtain fault monitoring time period set, obtain area difference set and gas data set, obtain optimal optical cable joint box set, obtain the geographic coordinates of the optical cable joint box corresponding to the gas data, extract spare optical cable joint box from spare optical cable joint box set, replace the optical cable joint box, obtain replacement optical cable joint box, complete optical cable joint box fault identification based on remote positioning based on optimal optical cable joint box set group and replacement optical cable joint box set.The present application can improve the efficiency and accuracy of optical cable joint box fault detection, and guarantee the stable operation of optical cable network.

The utility model relates to a spaceborne interface expansion device and a satellite, through designing a spaceborne interface expansion circuit structure composed of four kinds of cables and two kinds of resistors, a device for circuit communication expansion of a signal bus hardware interface and connection change of a hardware interface channel is formed, the resistors at different positions are selected through welding and dismounting, and the communication expansion of the signal bus hardware interface is realized. According to the utility model, a bus interface line expansion function is realized, and the bus interface line expansion device is suitable for interface expansion of a dual-channel dual-wire CAN bus, an RS485 communication interface bus and a multi-wire LVDS / RS422 communication interface, and meets and adapts to the requirements of communication bus manufacturing of a whole-satellite cable network of an existing commercial satellite. The device is easy to manufacture, the difficulty in manufacturing the whole satellite cable network and the difficulty in wiring layout design of the cable network are reduced, the cost performance and the reliability are high, and a reliable, firm, convenient, rapid and attractive electrical connection structure is provided for the whole satellite-borne electrical link cable network.

A method of detecting a radio frequency signal leakage in a wired cable network may be provided. The method may be performed by a testing instrument. The method may include scanning wireless radio frequency signals in a test area. The method may also include receiving a wireless radio frequency signal in response to the scanning and extracting a bit pattern from the received wireless radio frequency signal. The method may further include comparing the extracted bit pattern with one or more predetermined bit patterns associated with corresponding one or more cable modems in the wired cable network. The method may additionally include indicating that the received wireless radio frequency signal is a leakage signal from the wired cable network in response to determining that the extracted bit pattern matches at least one predetermined bit pattern of the one or more predetermined bit patterns.