99results about "Ring-type electromagnetic networks" patented technology

The invention discloses a pre-configuration protection method based on risk identification, and the method comprises the steps: collecting multi-dimensional data of a target electric power optical communication network, including logic topology information, a service demand set and dynamic environment data; logic links in the target power optical communication network are identified and divided into different shared risk groups, and a comprehensive risk index of each shared risk group is calculated; adding the shared risk groups of which the comprehensive risk indexes are greater than a preset risk index threshold value into a to-be-protected queue, and generating an optimal standby network loop for each shared risk group in the queue to obtain a network protection ring of the to-be-protected queue; when a to-be-processed service request is received, selecting a target protection path for the to-be-processed service request from the network protection ring, so that the to-be-processed service request is switched to the target protection path when a fault occurs; according to the invention, the network can be rapidly switched when a fault occurs, and the reliability and recovery speed of the power optical communication network are improved.

The invention discloses a power transmission line unmanned aerial vehicle communication networking system based on an optical fiber ring network, and relates to the field of power transmission line communication networks. The plurality of integrated base stations form an optical fiber ring network through the OPGW optical cable and the LTE MESH ad hoc network; the unmanned aerial vehicle executing the power transmission line inspection task and the corresponding fixed airport are accessed to an information intranet through an optical fiber ring network; wherein the integrated base station comprises an OPGW integrated base station and a MESH integrated base station; the OPGW integrated base station is deployed at a node with an optical fiber splice closure on a power transmission line tower, and is accessed to the information intranet in a wired connection mode; and the MESH integrated base station is deployed at a node, without an optical fiber splice tray, on a power transmission line tower, and is accessed to the OPGW integrated base station in a wireless connection mode. The power transmission line unmanned aerial vehicle communication networking system based on the optical fiber ring network can guarantee timely, safe and efficient large-scale data transmission.

The invention discloses an optical fiber ring network optical cable link multi-mode physical information sensing method and system, and belongs to the technical field of optical fiber ring network communication link monitoring. In order to solve the technical problem that a fault of an electric power communication optical cable link is difficult to accurately identify and distinguish due to the coupling effect of multiple physical quantities such as external damage, stress and temperature, based on a single idle optical fiber, the phase change of a backscattering signal is obtained through a phase reduction technology; and a multi-mode physical quantity coupling model containing axial, radial and circumferential strain and temperature is constructed and inverted, so that quantitative distinguishing and positioning of stress, strain, temperature and vibration are realized. According to the method, a step-by-step decoupling strategy of first temperature compensation, then strain inversion and then vibration separation is adopted, and a two-stage discrimination mechanism of physical prior and machine learning is combined, so that the accuracy and interpretability of event recognition are remarkably improved. Depth perception and accurate fault positioning of the physical state of the optical cable link are realized.

The invention discloses a multi-ring topology redundancy and data strong real-time fault-tolerant method for an optical fiber reflection memory network, which comprises the following steps of: inserting a reflection memory card into each computer, and connecting the reflection memory cards through an optical fiber to form a ring network; on the basis of a ring network topology structure, a dual-redundancy system with one main redundancy and one standby redundancy is adopted; the design subsystem is connected with a switch through a bridge node to realize cross-region strong real-time and quasi-synchronization; designing main and standby systems to transmit and receive the same data at the same time, and performing redundancy elimination on the data by a receiving end; a monitoring mechanism of the backup system is designed, and whether data transmission interruption occurs in the main system is judged; whether a fault exists or not is judged by detecting a data flow state and an optical signal of each port, and a redundant backup system is selected for fault tolerance; and finally, a standard clock source is adopted to share standard time to the whole network, and the nodes carry out time correction by reading the standard time. The invention provides high reliability and real-time performance, and ensures that the system can still keep data integrity under the condition of a fault.

The present disclosure provides an in-vehicle communication system and a vehicle. The in-vehicle communication system includes a first optical device, N second optical devices, and an optical channel. Two ends of the optical channel are connected to the first optical device. The optical channel is further connected to the N second optical devices respectively. The N second optical devices correspond to N different first operating wavelengths. The first optical device is configured to transmit a first optical carrier to the optical channel. A wavelength of the first optical carrier includes the N first operating wavelengths. A second optical device i in the N second optical devices is configured to receive a second optical carrier i in the first optical carrier from the optical channel, and transmit a first optical signal i obtained through modulation based on the second optical carrier i back to the optical channel. A wavelength of the second optical carrier i is same as a first operating wavelength i corresponding to the second optical device i. The in-vehicle communication system provided in the present disclosure has a high communication rate, good communication quality, and strong applicability and practicality in an in-vehicle communication scenario.

The application discloses a communication method, device, system and train, relates to the field of optical fiber communication, and is applied to a processor in any compartment of a train, wherein the processor is connected with an optical fiber ring network, the processor and train communication equipment in the compartment perform communication data interaction, and then the processor and the optical fiber ring network perform communication data interaction in the form of optical signals, so that the train communication equipment in different compartments can communicate with each other. The communication data is not easy to be lost and is not easy to be affected by electromagnetic interference through the mode of data transmission by optical fibers instead of cables, so that the communication quality of the train communication equipment is improved. Moreover, the communication data of multiple train communication equipments is converted into optical signals and transmitted in the form of a bundle of light, so that multiple communication networks are not needed, and only one optical fiber ring network can realize data transmission of multiple train communication equipments at the same time, so that the complexity of the wiring environment in the train is reduced, and the total weight of the train is reduced.

A switching control method, network element and system in an SDH ring network, applied to a master processor of a network element in the SDH ring network, the network element comprising an eastward single board and a westward single board, and the total capacity of the panel ports in the eastward single board and the westward single board is greater than the total capacity of the backboard ports in the eastward single board and the westward single board respectively; the method comprises: obtaining virtual container (VC) cross corresponding information of the eastward single board and the westward single board, the VC cross corresponding information indicating the VC cross corresponding relationship between the panel ports and the backboard ports in the single board; when the optical fiber communication connection corresponding to the currently used single board in the eastward single board and the westward single board is disconnected, performing a multiplexing section protection switching operation of the network element according to the VC cross corresponding information, so as to improve the accuracy and reliability of the switching operation.

A communication method related to the field of optical fiber communication and applied to a processor (22) in a train car. The processor (22) is connected to an optical fiber ring network, and the processor (22) performs communication data interaction with a train communication device in a car and then performs communication data interaction in the form of an optical signal with the optical fiber ring network to implement communication between the train communication devices in different cars. Data transmission is performed via an optical fiber instead of a cable, so that communication data is not susceptible to loss and is immune to electromagnetic interference, thereby improving the communication quality of the train communication devices.Furthermore, the communication data of the multiple train communication devices is converted into optical signals and combined into a light beam for transmission, so that only one optical fiber ring network is required for the simultaneous data transmission of the multiple train communication devices without establishing multiple communication networks, thereby reducing the complexity of the in-train wiring environment and reducing the overall weight of the train. Furthermore, a communication device and a communication system, as well as a train, are provided.

To provide a communication system capable of improving fault tolerance when multiple faults occur in a ring-shaped wired communication path to which multiple communication devices are connected.SOLUTION: A communication system 8 having a wired communication network 2 and a wireless communication network 3 includes multiple first communication devices for transmitting data acquired from connected devices and a second communication device to which a device that collects data is connected. The multiple first communication devices and the second communication device are connected by a ring-shaped wired communication path. When breakage of the wired communication path is detected between the first communication device and the second communication device, the first communication device whose wired communication path has been broken with the second communication device or the second communication device determines a representative communication device that transmits data to the second communication device by wireless communication, among from a first communication device group to which the first communication device whose wired communication path has been broken with the second communication device is connected by wire.SELECTED DRAWING: Figure 1

The present invention discloses a mining video broadcasting system and operating method, comprising a control terminal and multiple multimedia devices. The control terminal is installed in an aboveground dispatch room. The multimedia devices are installed in the shaft and are adapted to communicate with the control terminal. The control terminal is adapted to transmit information to the multimedia devices in a variety of ways, including: designated transmission, in which the control terminal is adapted to transmit information to a designated multimedia device; sequential transmission, in which the control terminal is adapted to transmit information to multiple multimedia devices in a specific order; and network-wide synchronous transmission, in which the control terminal is adapted to transmit information to all multimedia devices simultaneously. The system enables efficient and secure information transmission and has a comprehensive fault detection and alarm mechanism, thereby improving the safety of underground operations and the flexibility of real-time scheduling.

The present invention provides an optical path switching system and an optical path switching method in which an intramural node and one or more extramural nodes arranged on looped optical fiber are used. A terminal connected to the extramural node is connected to the intramural node via a first core extending from the intramural node in a first direction along the optical fiber, while power supply and control are carried out from the intramural node via a second core extending from the intramural node in a second direction going the opposite way along the optical fiber relative to the first direction. When communication via the first core is unavailable, the connection is switched from the first core to a third core extending from the intramural node in the second direction, and the terminal is connected to the intramural node via the third core.

The objective of the present disclosure is to enable confirmation of a connection between optical fibers using test light from an accommodating station, even when a point-to-point connection is being carried out in an optical fiber network.　Disclosed is a remote optical path switching node for connecting two loop networks in which optical fibers are connected in a loop, wherein the two loop networks comprise an upper loop close to a tester that emits test light and a lower loop far from the tester, said remote optical path switching node comprising: an optical cross-connect connected to the optical fibers constituting the lower loop; a testing optical coupler that is connected to a testing optical fiber for propagating test light in the upper loop, and that can be connected to the optical cross-connect; a control unit for controlling connection of the optical cross-connect and the testing optical coupler; and a light extraction unit for detecting the test light propagated in the upper loop and emitted from the testing optical coupler or the optical cross-connect.

The application discloses an optical signal inner circulation delay system based on electro-optic polarization modulation, comprising a signal light source, a first polarization beam splitter prism, a first electro-optic polarization modulator, a second polarization beam splitter prism, a second electro-optic polarization modulator, a third polarization beam splitter prism, a first full reflection mirror, a first lens, a first optical fiber collimator, a single-mode / multi-mode optical fiber, a second lens, a second optical fiber collimator and a second full reflection mirror, forming a ring-shaped light path. The length of the single-mode / multi-mode optical fiber and the high level duration of the modulation electric signal are adjusted, the repetition frequency and the pulse width of the output optical signal can be changed respectively, and therefore the application can also be used for converting continuous light into controllable pulsed light. The number of times that the signal light circulates in the ring-shaped light path can be controlled through the loaded electric signal, the delay time is flexibly adjusted, and the delay time range is expanded.

A connection system and a connection method according to the present invention use an in-facility node installed on a loop-shaped optical fiber and optical cross-connects in a plurality of external nodes arranged at different positions on the optical fiber. Among the optical cross-connects, with respect to a first optical cross-connect and a second optical cross-connect, a first optical fiber core included in the optical fiber passes through the in-facility node and the first optical cross-connect, and does not pass through the second optical cross-connect.

The invention discloses an event database-based optical fiber ring network fault diagnosis method and system, and the method comprises the steps: collecting the historical operation data and fault event information of an optical fiber ring network, including optical power, bit error rate, polarization state parameters, OTDR waveforms and fault processing records, and building an event database; constructing a convolutional neural network model, and performing fault feature learning and model training on the samples in the event database by using the convolutional neural network model to obtain a trained optical fiber ring network fault diagnosis model; and inputting fault data acquired in real time into the trained optical fiber ring network fault diagnosis model, performing feature matching with historical samples in the database, and identifying fault types and causes on line to obtain a diagnosis result. And the operation and maintenance efficiency, the reliability and the intelligent level of the optical fiber ring network are obviously improved.

This specification provides a heterogeneous network architecture for high-speed trains. This heterogeneous network architecture includes: a vehicle-level Ethernet network comprising multiple vehicle-level Ethernet nodes, which are connected in series in a ring network to form a first channel and a second channel. The first channel is connected to the first network port of the subsystem, and the second channel is connected to the second network port of the subsystem. The train-level backbone network comprises four train-level backbone network nodes. Two train-level backbone network nodes are installed in each of the first and eighth carriages of each traction unit, and these two nodes are connected to the first and second channels, respectively. The train-level backbone network nodes interact with the vehicle-level Ethernet nodes through a backplane. Based on this network architecture, network transmission reliability can be improved while optimizing real-time and redundancy requirements, further meeting the transmission needs of high-bandwidth data services.

The present invention discloses a continuous variable bidirectional quantum teleportation device, comprising an interconnected entangled source, an input optical path, and an output optical path. The input optical path and the output optical path of the scheme both comprise a beam splitter with an adjustable splitting ratio, two beam splitters, two balanced zero-beat detectors, an amplitude modulator, and a phase modulator. The beam splitter with an adjustable splitting ratio is connected to the EPR entangled source, the two balanced zero-beat detectors of the input optical path are respectively connected to the amplitude modulator and the phase modulator of the output optical path, and the two balanced zero-beat detectors of the output optical path are respectively connected to the amplitude modulator and the phase modulator of the input optical path. The continuous variable bidirectional quantum teleportation scheme provided by the present invention can realize a bidirectional teleportation process under a pair of EPR entangled lights. Using this scheme to construct a quantum network and quantum conference can significantly increase the number of users that can be carried in the network and conference under fixed entangled resources.

The invention discloses a multipath switchable optical fiber loop communication system and method, the system comprises node devices, each node device comprises an optical fiber link entering the node device and an optical fiber link not entering the node device, when a single loop works, the optical fiber link entering the node device is controlled to be communicated with a main loop, and when the single loop works, the optical fiber link entering the node device is controlled to be communicated with the main loop; an optical signal passes through all node devices in the loop to form closed single-loop communication; when multiple loops work, in the sub-loops, the optical fiber links which do not enter the node devices are controlled to be communicated with the main loop, and the optical fiber links which enter the node devices are controlled to be communicated with the sub-loops, so that optical signals pass through the node devices in the sub-loops to form closed sub-loop communication. And the main loop optical signal skips the node equipment in the sub-loop to continuously keep closed main loop communication. According to the invention, automatic switching between the optical fiber single-ring topology and the optical fiber multi-ring topology is realized, fault equipment is replaced under the working condition of a parallel operation system, and the robustness of the system is kept.

This application provides a communication node and an optical communication network, belonging to the field of optical communication technology. The communication node includes a light source module, a link splitting module, and an optical transceiver module. The light source module provides local oscillator light and signal light to the optical transceiver module; the link splitting module receives downlink signals from the optical fiber, splits the downlink signals into N sub-downlink signals, and sends one sub-downlink signal to the optical transceiver module and the next node respectively, where N is a positive integer greater than 1; the optical transceiver module, based on the local oscillator light, obtains a signal with a wavelength matching the local oscillator light from the received downlink signals; it also generates an uplink signal with a wavelength different from the downlink signal based on the signal light, and sends the uplink signal to the optical fiber through the link splitting module. The uplink signal and the received downlink signal are transmitted in the same optical fiber but in opposite directions, saving optical fiber costs and fiber sourcing costs.

Embodiments of this application provide a large-scale networking routing method. A core uses an active routing mechanism, and an edge uses a reactive routing mechanism. The method includes: After a CPE node goes online, a CO node actively discovers a CPE route to form an edge OSPF independent small domain. An edge node maintains only a local routing table. The CO node may advertise a local subnet route to a CCU / an NCE in a point-to-point manner, to ensure that the CCU / NCE has a network-wide route; and / or the CO node advertises a local subnet route to another CO node in a point-to-point manner, to ensure that a distributed CO node has a network-wide route without being perceived by all other nodes in a network. According to the method disclosed in this application, a node storage requirement and a network flooding amount can be effectively reduced, and quick reachability of the network-wide route can be achieved.

The invention discloses an optical transmission system, an optical fiber loop system and electronic equipment, and relates to the technical field of optical transmission, and the optical transmission system comprises an isolation module which is connected with an output port of a first coupler and is used for receiving an optical fiber loop input signal; the first end of the hollow-core optical fiber is connected with the isolation module, and the hollow-core optical fiber is used for transmitting an optical fiber ring input signal; the feedback module is connected with the second end of the hollow-core optical fiber and is used for returning the input signal of the optical fiber ring to the hollow-core optical fiber; and the isolation module is also connected with the acousto-optic modulator and is also used for outputting the returned input signal of the optical fiber ring to the acousto-optic modulator. The fiber loop input signal is transmitted back and forth in the single-section hollow-core fiber, so that the equivalent transmission distance of the single-section hollow-core fiber is doubled, noise cumulants such as amplified spontaneous emission noise and nonlinear distortion are remarkably reduced, the signal transmission quality and the system stability are improved, and the system performance is improved. And the control difficulty of the acousto-optic modulator and the operation and maintenance complexity of the system are reduced.

An autonomous mining system (100) comprising a real-time digital video transmission subsystem (110) configured to obtain a video stream (125, 127) from underground and transmit the video stream to a control center (115) located on the surface, and an exploration and maintenance subsystem (130) located underground and configured to extract resources and bring the resources to the surface based only on commands received from the control center (115) through the real-time digital video transmission subsystem (110).

The invention provides a vehicle-mounted communication system and a vehicle, and is applied to the technical field of vehicle-mounted communication, the system comprises a central computing platform, a vehicle-mounted optical communication device and at least one optical communication network, and the optical communication network comprises an optical transmitting unit, an optical receiving unit, an optical fiber and a vehicle-mounted optical communication connector; the light emitting unit and the light receiving unit are connected with the vehicle-mounted optical communication connector through the optical fiber, the central computing platform is in communication connection with the light emitting unit and the light receiving unit, and the vehicle-mounted optical communication device is in communication connection with the vehicle-mounted optical communication connector; the light emitting units are located around the central computing platform to enable the light emitting units to share a cooling system of a vehicle with the central computing platform.

To enable optical transmission suitable for a P-type system that transmits a signal corresponding to the on / off of an operation switch.SOLUTION: A disaster prevention system configures a loop optical transmission line in which a path from a host device 10, via a disaster prevention terminal device 16, to an optical terminal portion 18 with a predetermined attenuation amount set is connected by a downlink optical transmission line 12 and an uplink optical transmission line 14. The disaster prevention terminal device 16 comprises an operation switch 28 that is actuated by a predetermined operation, and an optical transmission unit that switches the optical path of an optical signal so that an optical signal output from the host device 10 to the downlink optical transmission line 12 is bypassed to the uplink optical transmission line 14 midway along the downlink optical transmission line 12 without passing through the optical terminal portion 18 when the operation switch 28 is actuated. The host device 10 determines the actuation of the operation switch 28 based on changes in the optical signal output to the downlink optical transmission line 12 and input from the uplink optical transmission line 14, and performs predetermined receiving processing.SELECTED DRAWING: Figure 2

The invention relates to the field of optical network communication, in particular to a double-ring optical network communication management system for factory equipment control communication, which is used for solving the problem of insufficient reliability of a double-ring optical network caused by incapability of realizing cross operation of two networks in an operation process of the double-ring optical network. Comprising a communication supervision unit, a communication analysis unit, a communication statistics unit, a ring network switching unit and a maintenance management unit. According to the invention, in the operation process of the double-ring optical network, the evaluation unit of the network is subdivided into short links, transmission evaluation is carried out on the short links, the transmission evaluation is carried out in three aspects of transmission efficiency, transmission fluctuation and fault early warning, the comprehensiveness of transmission evaluation is improved, when the short links are abnormal, the information transmission of the whole line cannot be stopped, and the transmission efficiency of the whole line is improved. Information transmission is completed in a mode that the two lines operate in a crossed mode, so that normal operation of communication work can be guaranteed when the same position of the primary line and the secondary line of the double-ring optical network does not fail at the same time, and the operation reliability of the double-ring optical network is improved.

The present invention belongs to the technical field of optical secure communication, and discloses a quantum key distribution ring network without an interferometer. When quantum key distribution is carried out between the central node and any intermediate node in the network, both of them perform subcarrier signal modulation and add a random phase to generate a symmetric key. When quantum key distribution is carried out between any two intermediate nodes, the central node does not perform phase modulation, and the two intermediate nodes respectively perform subcarrier signal modulation and add 4 random phases. After signal transmission and detection are completed, the central node announces the measurement results, and then a symmetric key is generated. Compared with the prior art, the present invention can realize quantum key distribution between any two nodes in the ring without a trusted relay, only needs to perform phase modulation and optical intensity monitoring, does not need to use an interferometer, does not need to set the transmitter and receiver at the same time, and does not need polarization compensation and phase compensation, reducing resource consumption, increasing stability, and greatly reducing the deployment and operation costs.

The invention relates to a dual-redundancy-based optical fiber communication device and an optical fiber receiving and forwarding filtering method, and belongs to the field of optical fiber communication. The dual-redundancy optical fiber communication device comprises a main processing module, an optical fiber communication module, a VPX backboard, an optical fiber link and a power supply module. According to the invention, the ring topology is constructed through the dual-redundancy link, when the main path is interrupted due to problems such as equipment fault, link damage or signal interference, the standby path can automatically take over data transmission work, communication is ensured not to be interrupted, network paralysis caused by single-point fault is avoided, and the continuity of the network is effectively ensured; an additional standby optical switch is not needed, a redundancy function and optical fiber data filtering and forwarding are realized through existing optical fiber resources and optical modules, and the hardware cost is reduced; and the method has good compatibility and expandability.

An autonomous mining system includes a real-time digital video transmission sub-system configured to obtain video streams from underground, and transfer the video streams to a control center located above ground; and an exploration and maintenance sub-system located underground, and configured to extract a resource and bring the resource to the surface, based exclusively on commands received from the control center through the real-time digital video transmission sub-system.

An optical fiber ring link suitable for bidirectional communication, belonging to the field of optical fiber communication, includes an optical signal transmitting component for outputting a first optical signal and a second optical signal; an optical signal receiving component for receiving the first and second optical signals; and a second coupler for receiving the first and second optical signals output by the optical signal transmitting component and transmitting them to a first loop and a second loop respectively, and also for receiving the first and second optical signals output by the first and second loops and transmitting them to the optical signal receiving component respectively. The first and second loops are connected in parallel through multiple circulators to form a ring link. In this ring link, the transmission directions of the first and second optical signals are split by multiple circulators, so that the first and second optical signals are transmitted in clockwise and counterclockwise directions along the ring link respectively. This application can solve the technical problem that existing optical fiber ring links are not suitable for bidirectional communication.

A first multiplexer / demultiplexer splits an optical signal input from a first port and outputs the results from a plurality of second ports, and multiplexes optical signals input from the plurality of second ports and outputs the result from the first port. A second multiplexer / demultiplexer splits an optical signal input from a third port and outputs the results from a plurality of fourth ports, and multiplexes optical signals input from the plurality of fourth ports and outputs the result from the third port. A direction of travel of a wavelength component having a first wavelength, of an optical signal that passes through the first port of the first multiplexer / demultiplexer, and a direction of travel of a wavelength component having the first wavelength, of an optical signal that passes through the third port of the second multiplexer / demultiplexer, are mutually opposite directions. An optical switch is provided with a plurality of fifth ports and a plurality of sixth ports. The second ports of the first multiplexer / demultiplexer and the fourth ports of the second multiplexer / demultiplexer are connected to the plurality of fifth ports of the optical switch.