126 results about "Cable network" patented technology

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 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.

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 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.

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.

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.

The invention discloses an optical cable on-line monitoring method and device, and belongs to the technical field of optical cable monitoring, and the method specifically comprises the steps: a monitoring host carries out the initialization configuration, and determines a standby cable core list based on the network topology of a to-be-monitored optical cable; carrying out initial test on the standby cable core to obtain a historical baseline, and presetting an optical time domain reflection reference threshold and an optical power set threshold; switching to different standby cable cores according to a polling period, acquiring real-time optical domain reflection data and optical power data, and comparing with a historical baseline, a preset optical time domain reflection reference threshold and an optical power set threshold to judge an abnormal condition; retesting the abnormal cable core, positioning a fault and outputting an alarm in combination with a geographic information system; through cooperative work and polling monitoring of the optical performance monitoring module group, real-time discovery and accurate positioning of optical cable faults are realized, and the operation and maintenance efficiency and reliability of an optical cable network are improved.

Data signals transmitted over cable networks experience degradation, such as frequency-dependent loss, spectral tilt, signal-dependent nonlinear noise, distortion, and compression, which vary with cable characteristics, temperature, electrical loading, and traffic conditions. The present invention relates to improving network performance by estimating cable signal-degradation using physics-based nonlinear system modeling and telemetry data and applying corrections to operating parameters of cascading amplifiers to offset the signal degradation, thereby improving overall network efficiency and reliability.

The invention provides a carrier rocket cable network beam splitting data processing method, device and equipment, belongs to the technical field of rocket manufacturing, and solves the problems of unreasonable layout, poor assembly compatibility and incapability of dynamically responding to system change in carrier rocket cable beam splitting design. The method comprises the following steps: acquiring rocket appearance data and cabin section layout data; analyzing and processing the rocket appearance data and the cabin section layout data to obtain spatial constraint data; determining a trunk line path according to the spatial constraint data; according to the cabin section layout data and the main line path, determining segmented current data; determining cable line diameter data according to the segmented current data; and determining rocket cable beam splitting data according to the cabin section layout data and the cable wire diameter data. According to the scheme, the layout reliability is improved, the space utilization rate is increased, and the electrical stability of the rocket is guaranteed.

The invention provides a deep and far sea wind power plant unit arrangement and current collection line collaborative planning method, system and device, and a storage medium. The method comprises the following steps: S1, initializing a wind power plant layout and parameter definition; s2, establishing a collaborative optimization decision model; and S3, optimal scheme decision making. Original scattered cable networks are merged into a unified public corridor through active planning, the occupied area of submarine cable routing is greatly reduced, the requirement for intensive sea use is met, and remarkable social and environmental benefits are achieved; according to the method, the traditional single target optimization of generating capacity maximization is subverted, a collaborative decision-making model comprehensively considering the generating benefit and the submarine cable engineering cost is established, and the global optimization of economy is realized from the perspective of the full life cycle of a project; the regular and straight cable gallery greatly simplifies the laying construction of submarine cables, shortens the construction period, reduces the risks of crossing, bending and the like in the construction process, and facilitates the later operation and maintenance.

The invention provides a submarine optical cable information acquisition and fusion method based on a large model intelligent agent, and the method comprises the steps: collecting first submarine optical cable data from a plurality of submarine cable websites through a crawler technology, and converting the first submarine optical cable data into structural data through a preset large model; acquiring second submarine optical cable data from a submarine optical cable and an official website of an operator by using a multi-agent collaboration architecture, and converting the second submarine optical cable data into structured data; storing the submarine optical cable data of each data source in a graph database in a unified manner, and loading submarine optical cable nodes, login point nodes and related relational data from each data source to the graph database to obtain integrated data; and the integrated data diversity set is stored in a MongoDB database, and submarine optical cable information fusion is completed. Through a multi-agent cooperation mode, automatic processing of a complex website structure is realized, and the data acquisition efficiency is remarkably improved.

An electrical connection interface (10) comprising a set of connection elements for high-voltage power transmission cables (620, 630, 640) and intended for connection to an electrical cabinet (101). According to its main feature, the interface comprises a set of insulated conductive busbars (21, 22, 23, 31, 32, 33, 41, 42, 43), grouped in three busbar configurations (20, 30, 40); the busbars being fixed and rigid, they are configured to provide an electrical connection between the connection elements and the cabinet in such a way as to facilitate the interchangeability of the electrical cabinet. The invention also relates to a simplified method for connecting and disconnecting the electrical cabinet from a high-voltage power transmission cable network. Figure 1

The invention discloses an aerial optical cable environment sensing and state monitoring method based on a BOTDR (Brillouin Optical Time Domain Reflectometer), and relates to the technical field of computer and auxiliary equipment repair, and the method comprises the steps: collecting optical cable strain and temperature parameters, environment parameters and Beidou positioning data through an improved BOTDR sensor and an auxiliary sensor; performing denoising and format-unified preprocessing on the acquired data, correlating strain, temperature and environmental parameters through federal learning, generating a preliminary evaluation result of the optical cable state, and filtering invalid data; an edge and cloud cooperative processing architecture is constructed, fault features are extracted after the preprocessed data are received, and an optical cable health index is generated in combination with historical data; when the health index of the optical cable is lower than 60 points or sudden strain occurs, an early warning mechanism is triggered, BOTDR and Beidou data are integrated to position a fault point, a work order is automatically distributed, and a fault analysis report is pushed, the purposes of active early warning, accurate positioning and efficient operation and maintenance can be achieved, and stable operation of an aerial optical cable network is guaranteed.

The invention discloses a distributed reconfigurable wiring method, which specifically comprises the following steps of: 1, extending signal and power output to a plurality of positions in a spacecraft structure by taking an integrated electronic and power supply controller as a center and adopting a structure embedded FPC (Flexible Printed Circuit) mode for arranging a switching PCB (Printed Circuit Board) / switching cable; step 2, connecting the signal and the power to each single machine in a local area through a switching PCB / switching cable; 3, extracting required signals according to the requirement of a spacecraft local area arrangement single machine to form a switching PCB / switching line input; step 4, selecting an output connector and a node definition of the switching PCB / switching cable according to a local wiring optimization result; and 5, determining the design of the local cable network. The space is saved, the weight is optimized, the anti-interference performance is enhanced, and the electromagnetic compatibility optimization is more convenient.

The invention provides a satellite cable network weight reduction method and a satellite, and the method comprises the steps: S1, carrying out the optimization of single-machine layout, and enabling the layout spacing between single-machine devices in mutual connection to be within a preset range; step S2, optimizing the cable network contact table, including dividing preset high-power contacts and signal contacts into different electric connectors to respectively form a power electric connector and a signal electric connector; selecting a wire gauge according to the contact current value; breakpoint processing is carried out on the cable connection relation forming the closed net-shaped structure, and contacts bypassed by a path are disconnected and converted into a scattered line or switching module form; s3, telemetering and remote control signals are transmitted in a wireless transmission mode instead of a cable; and S4, replacing a conventional cable with an optical fiber, and adjusting the communication capacity, the cross sectional area and the weight of the optical fiber.

The invention provides a cable network grounding research and judgment system and method based on topological transient characteristics, and the system carries out the research and judgment of a cable network grounding fault based on the transient zero-sequence current characteristics of a cable network. Transient zero-sequence current direction characteristics of a ground fault are converted into topological transient characteristics based on topology and amplitude comparison, the research and judgment process of the research and judgment method is triggered by a zero-sequence voltage abrupt change event of a bus, high-speed, synchronous and short-window acquisition is performed in a sampling process, then the transient amplitude in a first half wave is calculated, and topological characteristics are analyzed; according to the technical scheme, the method is specially used for capturing the earth fault instant electromagnetic transient process, and the problem that the accuracy of a transient signal positioning method at the present stage is not high can be solved.

The invention discloses an astronavigation cable network auxiliary wiring data processing method. The method comprises the steps of cable network structured data acquisition, branch connection relation simplification, main chain analysis, main chain arrangement, branch chain arrangement and marking. According to the method, structural data of a cable network can be analyzed to generate a 1: 1 wire harness two-dimensional diagram by obtaining the structural data. According to the method, the working efficiency and accuracy are remarkably improved, more standard, efficient and intuitive cable wiring diagram design and arrangement experience is provided for designers and operators, and the requirements of high-complexity spacecrafts such as satellites and manned airships for refined and standardized wiring can be met; and a powerful guarantee is provided for the reliability and the safety of a spacecraft electrical system.

This invention provides a method and system for automatic allocation of spacecraft cable network resources based on mixed-integer programming. The method includes: automatically extracting and statistically analyzing cable network resource demand and supply through structured data or manually entered data; pre-allocating cable network resources according to design requirements; importing cable network connector connections from the previous design; constructing the cable network resource allocation problem as a mixed-integer programming model, defining decision variables to transform complex design constraints such as resource matching, channel occupancy, and security isolation into mathematical constraints, and constructing an objective function with multiple objectives such as minimizing the total cable network length or reducing complexity; solving the model using mathematical programming methods; and performing rapid, local manual intervention and iterative optimization of the allocation scheme. This invention automates and intelligentizes cable network design, significantly improving design efficiency and accuracy, and supports rapid, local manual intervention and iterative optimization through resource freezing functionality.

The invention discloses an optical cable network optical intersection planning method, device and equipment, a medium and a computer program product, and the method comprises the steps: determining an uncovered road intersection based on the coverage range of stock optical intersection; for the uncovered road intersections, automatically planning the positions and levels of newly added intersection light intersections; determining an uncovered tail end grid based on the coverage range of the stock optical intersection and the coverage range of the newly added intersection optical intersection; and for the uncovered tail end grid, automatically planning the position and the level of the newly added roadside light intersection. According to the invention, on the basis of the coverage range of the stock light intersection, the newly added light intersection planning is carried out on the road intersection and the tail end grid which are still not covered, so that the comprehensive coverage of the road intersection and the tail end grid is realized, and the light intersection planning efficiency and accuracy are improved.

The invention discloses an automatic matching device for an adapter cable address of a cable network test system, which relates to the technical field of cable test, is used for identifying a cable address of a target adapter cable and automatically configuring the cable address, and comprises an upper computer, a main control MCU (Microprogrammed Control Unit) and a plurality of cable address identification modules. According to the invention, address storage and addressing are carried out on a storage chip, and the positions of cables are rapidly matched in a large number of cable address pools in cooperation with MCUs of all parts and a software algorithm, and then the positions are uploaded to an upper computer. The automatic adapter cable address matching device of the cable network test system can automatically identify and match the address of the adapter cable, so that manual intervention is reduced, the configuration process is simplified, and the operation efficiency is improved. When the position of the adapter cable is replaced, the system does not need to be reconfigured, the configuration information can be automatically updated, and the configuration time and complexity are remarkably reduced. The automatic address matching and configuration reduce the possibility of human errors, and improve the accuracy and reliability of the test.

There is provided a cable network power unit (22) configured to generate a DC power signal periodically switching between a positive and negative voltage, the power unit (22) comprising a polarity switching module (66), current measuring device (60), and a controller (64), wherein the controller (64) is responsive to abrupt changes in current to trigger the polarity switching module (66) to switch polarity of the DC power signal, and thereby reset surge protectors in active devices such as nodes or amplifiers if they have triggered due to a power surge, for example from a lightning strike.

The application relates to the technical field of power distribution networks, and provides a power supply reliability evaluation method and device for a power distribution network, computer equipment, a readable storage medium and a program product. The method comprises the following steps: obtaining a topological sensitive correlation area according to a cable laying engineering file of the power distribution network and an underground cable network topology model; dividing the topological sensitive correlation area into multiple subareas, obtaining geological activity data of monitoring points in the multiple subareas within multiple set evaluation periods, and obtaining a surface subsidence sequence and a soil moisture content sequence corresponding to each topological sensitive element; when a slow deterioration trend of an electrical parameter of a power supply access point is detected according to power distribution network operation data, obtaining a target suspected disturbed topological path set according to the underground cable network topology model, the surface subsidence sequence corresponding to each topological sensitive element and the soil moisture content sequence, so as to obtain a power supply reliability evaluation result of the power distribution network. The method can improve the accuracy of the power supply reliability evaluation result.

This application relates to a method and system for intelligent cable network mapping based on urban road networks. The method includes: determining a road network distribution map within the coverage area of ​​the cable's origin and destination equipment coordinates; performing path calculations on the road network distribution map using a multi-dimensional path algorithm to obtain the cable's routing path; generating cable channels along the cable's routing path on the urban road network; and generating working wells on the cable channels according to preset parameters to form a cable network routing map within the coverage area of ​​the origin and destination equipment coordinates. This application cleverly utilizes the relationship between cable laying and the road network, automatically mapping the cable network based on the cable's origin and destination and road network information. It effectively digitizes cables with unclear laying records, reduces the time and effort required for manual on-site data collection, and solves the problem of high costs associated with collecting existing cable routing information.

The application provides an optical cable network natural language operation and maintenance method and system, belongs to the technical field of optical cable communication, is applied to an optical cable network natural language operation and maintenance system, collects multi-dimensional data including optical cable vibration, temperature, environment, optical power and OTDR link attenuation through an enhanced optical fiber distribution robot of a physical perception layer, encapsulates into a multi-sensing data package MSDP, reports after data alignment relying on clock synchronization, carries out unified semantic modeling, fusion storage and semantic reasoning on the MSDP data package and network resource data, GIS geographic information and service data through a data fusion layer, constructs an optical cable operation and maintenance knowledge graph, receives natural language instructions of operation and maintenance personnel through an application interaction layer, completes intention understanding, knowledge retrieval, task planning and execution scheduling by the intelligent decision layer through multi-agent collaboration, simultaneously carries out alarm correlation analysis and health degree scoring, generates a preventive maintenance work order, and thus reduces the operation and maintenance threshold, improves the fault early warning and emergency recovery efficiency.