40 results about "Self-healing ring" patented technology

The present invention relates to a self-healing ring network and a method for fault handling in said network. Said network comprises two communication paths (1, 2) and at least two nodes (N1, N2, N3, N4, N5). A first node (N1) and a second node (N5) suppress transmission to and/or reception from a segment (IS) in the ring, called an inactive segment. In the case of an occurring fault, the inactive segment is moved to the fault. According to the invention the network comprises a separate supervisory channel (OSC) for transmitting information of the fault between the nodes (N1, N2, N3, N4, N5) of the network, in which supervisory channel (OSC) a fault flag (ASSERT_PSS) is provided for the indication of the fault.

The invention relates to an intelligent control system, belongs to the technical field of automatic control, and in particular relates to improvement on an intelligent LED illumination energy-saving control system. The system comprises a control center, a plurality of electrically connected control stations and a plurality of lamp control circuits which are electrically connected with the controlstations respectively, wherein the control center is a computer system with a control software, and language environment adopts VB, and the control center is connected with the control stations through Ethernet or a RS485 bus and realizes self-healing ring network by the connection of a fiber optical transceiver; and the control stations adopt an ALtera programmable logic device which is embeddedwith a NIOS kernel, and the operation system uses Uclinux. The intelligent LED illumination system makes full use of electronic technology, communication technology and computer network technology toorganically connect various LED illumination devices, realizes effective management and control, and facilitates remote control, monitoring and energy-saving control.

The present invention relates to one kind of ring fiber CAN bus self-cure network interface device, which includes one CPLD device EPM7128S, two light transmitters LEDR and LEDL, two light receivers PINR and PINL, one active quartz crystal ocillator PXO-660, network state LEDs D-sr and D-solution, and receiving state LED D-rx. The CPLD is connected to the CAN controller, and fiber loop via photoelectronic converter module PIN and LED. By means of the present invention and relevant fiber CAN network technology, ring fiber CAN bus self-cure network may be constituted. The present invention can raise the viability of ring fiber CAN bus network obviously, and has the features of simple structure, high reliability and convenient altering and maintenance.

A bidirectional WDM self-healing ring network is provided and includes an outer ring network and an inner network for processing N units of optical signals and for performing a protection switching by using the outer ring network when the inner ring network suffers a link failure.

Disclosed herein is a bidirectional wavelength division multiplexed self-healing ring network. The ring network includes a central office and a plurality of remote nodes. Two optical fibers each connect the central office and the remote nodes in a ring form to allow optical signals to be bidirectionally received and transmitted between the central office and the remote nodes. One of the two optical fibers is a drop fiber for transmitting optical signals from the central office to the remote nodes, while the other is an add fiber for transmitting optical signals from the remote nodes to the central office.

The present invention discloses an industrial Ethernet switchboard, which can be applied to the fields of digitalized transformer substation, industry, military and transportation. The industrial Ethernet switchboard comprises: a housing, a power supply module, a plug-in module, a cascade plug-in module, a self-healing ring network module, a PHY module, an MAC chip module, a central processor unit module, an Atmega128 module, a CPLD module, a FLASH and so on. The present invention is an industrial Ethernet switchboard specifically designed for the environment of electric power automation and digitalisation transformer substation, possesses strong ability of resisting electromagnetic interference, excellent exchange performance due to an exchanging framework without obstruction, strong management storage capacity and intelligent management maintenance. When physical connection fault (N-1) occurs, protection switching can prevent the loss data packet, and ensure that the time-delay for communication recovery is 0. Thus, the invention can reduce manual operation, manual fault and operation costs. Moreover, the invention can fully satisfy the tough requirements on electric power environment and transportation environment, and can be also applied to digitalized transformer substation network, transportation monitor network and the like.

A system for communication of signals between remote devices and monitoring and control devices via fiber. The system in accordance with one aspect of the invention includes a plurality of remote interface units each coupled to a corresponding one of the remote devices, and a base unit coupled to the one or more monitoring devices and the one or more control devices. The plurality of remote interface units and the base unit are interconnected by fiber optic links to form a ring. Each of the remote interface units supplies a video signal to the base unit for distribution to the one or more monitoring devices, and the base unit supplies control signals from the one or more control devices to the plurality of remote interface units.

The invention relates to a cascade connection type video optical transmitter and receiver with the protection of an optical self-healing ring, which consists of a first-level cascade connection type video optical transmitter and receiver with the optical self-healing ring, a second-level cascade connection type video optical transmitter and receiver with the optical self-healing ring, a third-level cascade connection type video optical transmitter and receiver with the optical self-healing ring and the like until an Nth-level cascade connection type video optical transmitter and receiver with the optical self-healing ring, wherein the N is a natural number smaller than or equal to 16 and more than or equal to 2. The cascade connection type video optical transmitter and receiver is characterized in that the adjacent levels of the cascade connection type video optical transmitter and receiver with the optical self-healing ring are connected through a single mode fiber, and the first-level cascade connection type video optical transmitter and receiver with the optical self-healing ring and the Nth-level cascade connection type video optical transmitter and receiver with the optical self-healing ring are connected through the single mode fiber, so as to form an optical link of the optical self-healing ring. The application reliability of a cascade connection type video optical transmitter and receiver system can be greatly improved by only increasing low cost. The optical links among all levels of the optical transmitter and receiver with the optical self-healing ring are interrupted, the data of video and the like can be automatically transmitted through the optical self-healing ring without influencing the normal video transmission.

The invention discloses a self healing ring RS485 bus structure with short circuit and circuit break prevention in the field of signal transmission. The structure comprises a control center and a plurality of monitoring modules. The control center is connected with the plurality of monitoring modules through an RS485 ring bus. The structure is characterized in that two driving interfaces of the RS485 ring bus are electrically connected with a control center CPU through multiple paths of either-or data selectors. The structure has the advantage of simple construction, single bus, double redundancy bus, ring bus, and logical bus structures are optional, and the working of the system is not affected by faults (short circuit and circuit break) at any position.

The invention discloses an optical fiber self-healing ring network video encoder which adopts an optical fiber self-healing ring network technology. The video encoder comprises a video input module, a video compression encoding module and an optical fiber self-healing ring network module, wherein the video input module is used for inputting an analog video and carrying out A/D conversion; the video compression encoding module is used for carrying out compression encoding for the video obtained from the video input module and encapsulating the video into an IP packet signal; the optical fiber self-healing ring network module is used for receiving the IP packet signal sent by the video compression encoding module and finishing the self-healing ring network optical fiber access of the IP packet signal; and the output end of the video input module is connected with the input end of the video compression encoding module, and the output end of the video compression encoding module is connected with the input end of the optical fiber self-healing ring network module. The optical fiber self-healing ring network video encoder is adapted to the long-distance high-reliability networking transmission and control requirements of a large-scale high-definition encoder and has the functions of Ethernet access and long-distance image transmission through an optical fiber.

The invention relates to a measurement and control communication management machine for a photovoltaic box transformer substation. The management machine is suitable for intelligent control and communication management of box transformer substations in photovoltaic power stations of non-direct grounding systems or low-resistance grounding systems of 35kV or below. With the measurement and control communication management machine for the photovoltaic box transformer substation adopted, analog quantity acquisition, non-electric quantity protection, remote control and communication functions can be realized at the high and low-voltage side of the box transformer substation. The measurement and control communication management machine integrates the functions of a communication management machine and an optical fiber switch; the measurement and control communication management machine can be connected into equipment such as an inverter, a junction box, an assembly monitor, a video monitoring and a radiation instrument, and therefore, centralized transmission of communication information in the intelligent equipment in the box transformer substation can be realized. The measurement and control communication management machine can be connected into a photovoltaic power plant monitoring system through a self-healing ring fiber, and therefore, remote management and automatic monitoring of a photovoltaic field can be realized, and a fully-intelligent and unattended operation and management mode of the photovoltaic power stations, which requires few workers to guard the photovoltaic power stations, can be satisfied.

The invention discloses an industrial switch ring network with a dual-redundancy protection function. The industrial switch ring network with the dual-redundancy protection function comprises a plurality of industrial switches; two sets of link aggregation ports are arranged between every two adjacent industrial switches. According to the guidance of the far domain private ring X-Ring protocol rule, two link aggregation links are established according to the port, and a self-healing ring of single ring + link aggregation is formed; the ports include an annular port and an aggregation port. By adopting the industrial switch ring network with the dual redundancy protection function provided by the invention, the reliability coefficient of the industrial switch ring network is improved.

The invention discloses an intelligent temperature monitoring system of a crosslinked polyethylene XLPE power cable and relates to the technical field of power cable monitoring. The system comprises a temperature sensor, a real-time temperature collector substation, a double-ring optical fiber self-recovery ring network and a working station computer; the working station computer is connected with the real-time temperature collector substation through the double-ring optical fiber self-recovery ring network, and the real-time temperature collector substation is connected with the temperature sensor through an interface circuit; the interface circuit refers to connecting the real-time temperature collector substation with the temperature sensor through a photoelectric coupler; the real-time temperature collector substation mainly comprises a central processing unit CPU, a memory, a display, a power supply, a clock unit and a self output control circuit; and an I/O interface is respectively connected with the interface circuit and an optical transmitter and receiver in the double-ring optical fiber self-recovery ring network. The intelligent temperature monitoring system disclosed by the invention has the advantages of simple structure, high reliability, strong expandability and easy installation and maintenance, and the system can find the insulation defects of the power cable, prevent the accidents and guarantee the safe operation of the cable.

The invention discloses a tunnel intelligent lighting remote monitoring system used for tunnel lighting. The tunnel intelligent lighting remote monitoring system comprises a tunnel intelligent lighting controller, a remote monitoring device and a network transmission system. The tunnel intelligent lighting remote monitoring system is characterized in that the tunnel intelligent lighting controller controls a plurality of sets of lighting devices through a PLC at the same time, the remote monitoring device is composed of a communication circuit, a collecting circuit, a data processing circuit and a control circuit, the network transmission system is connected with a host machine in a tunnel through a local area network composed of an optical fiber self-healing ring network in the tunnel, a main optical-fiber MODEM and one or more sub optical-fiber MODEMs are connected through optical fibers to form the optical fiber self-healing ring network, and the host machine is connected to the Ethernet through a communication converter to transmit detection monitoring data in the tunnel to a central monitoring room. The tunnel intelligent lighting remote monitoring system has the advantages of being high in tunnel lighting reliability, reasonable in lighting arrangement, capable of carrying out remote monitoring and lowering maintenance workload, and energy-saving.

The invention discloses a power-distribution-automation and network-distribution-automation comprehensive control system. The power-distribution-automation and network-distribution-automation comprehensive control system comprises a network-distribution management system, a server, a real-time working station, a GIS, a HUB, a pre-working station, a data management working station, industrial control PCs, in-station monitoring terminals and a self-healing ring structure, wherein the network-distribution management system is achieved through a local area network composed of a plurality of computers and used for network-distribution management, and is connected with the server, the real-time working station and the GIS through an optical communication system; the server, the real-time working station and the GIS are electrically connected with the HUB respectively. According to the power-distribution-automation and network-distribution-automation comprehensive control system, the monitoring function is achieved through FTUs; optical couplers of the self-healing ring structure are arranged, a main-auxiliary mode is used for working, automatic identification and changing connection can be carried out, and the reliability of optical communication is improved; the reliability, the economy and the operation quality of a power network can be obviously improved.

The invention discloses a line optical difference synchronization method based on HSR. The line optical difference synchronization method comprises the following steps: establishing a bidirectional redundant double-ring network structure; performing looped network delay measurement; processing sampling data synchronously; performing ring network topology monitoring; reazlizing state quantity datatransfer. A mature HSR technology is utilized, a sampling synchronization scheme does not depend on a synchronous clock source, the synchronization precision is high, and N (N is larger than or equalto 2) end differential motion can be achieved. The channel delay is not considered, and when the number of the device nodes in the ring network is not more than 16, the delay time of the message in the ring network is not more than 1ms. The HSR network connection technology is utilized, the long-distance self-healing ring network can be achieved, and the network nodes are flexible in configurationand easy to maintain.

The invention belongs to the technical field of searching and tracking, and particularly relates to a camera searching and tracking method based on network big data, which comprises a traffic monitoring terminal, an individual monitoring terminal, a public monitoring terminal, an individual monitoring platform, an optical fiber self-healing looped network, a regional monitoring server and a municipal monitoring server, the traffic monitoring terminal, the individual monitoring terminals and the public monitoring terminal are all connected with light exchangers, the individual monitoring terminals are gathered and connected to the individual monitoring platform through the light exchangers, and the optical fiber self-healing looped network collects information of the light exchangers and the individual monitoring platform and transmits the information to the regional monitoring server. According to the invention, through the individual monitoring platform, the information of the monitoring cameras installed by the individual households can be connected to the individual monitoring platform, the individual monitoring platform carries out integrated management on the individual households and transmits the monitoring information to the regional monitoring server at the same time, so that on-site operation of workers is not needed, and timely searching and tracking are facilitated.

The invention discloses a well lid control system and an intelligent well lid for a comprehensive pipe gallery, and belongs to the technical field of civil defense engineering. The intelligent well lid comprises an intelligent well lid terminal and is composed of a well lid body and a local control box. The well lid control system comprises an intelligent well lid terminal, a pipe gallery master control room system and a networking module. The intelligent well lid terminal and the pipe gallery master control room system are in network interconnection through a networking module. Because the local control box is installed nearby the well lid body, the lifting, stopping and falling of the well lid body can be manually operated, and maintenance personnel can overhaul and maintain the well lidconveniently. A well lid one-button opening and closing system is arranged in the pipe gallery master control room system to enable the well lid to be opened and closed by a control room and a civildefense department, and the well lid can be managed more completely by adopting two sets of opening and closing modules. The networking module adopts a main optical fiber loop and a secondary opticalfiber loop to form a self-healing ring network, so that normal network communication is ensured, and equipment safety and reliability control are ensured as well.