318results about How to "Achieve redundancy" patented technology

Transparent redundancy may be achieved at a MPLS-MPLS hierarchical boundary or a BMA-MPLS hierarchical boundary by utilizing local repair mechanisms extant in each domain to select automatically the same boundary network devices as the primary and secondary boundary network devices. In the MPLS domain, two LERs advertise the ability to forward traffic to a phantom LER and map all traffic originated into that domain as having been on a path originating at the phantom LER. This will cause the LERs to appear as being one hop away from the phantom LER, causing MPLS to assume the real LERs are part of a LSP terminating at the phantom LER. MPLS local repair will thus establish one of the LERs as the primary LER and the other LER as the secondary LER. In an Ethernet domain, each boundary network device is treated analogously to a router in the VRRP scheme for routers.

The invention discloses a control system of a pure water cooling device of a high voltage direct current (HVDC) transmission converter valve, comprising two independent subsystems, wherein, each subsystem comprises a programmable logic controller (PLC), an input/output module, a sampling measurement system, a synchronization module, a human-machine interface system and a power supply system; the PLCs of the two subsystems can realize non-disturbance switching between the two PLCs and seamless exchange of information of each sub-control system through synchronous optical connection; the control system can monitor each online physical quantity in real time, and accurately control actions of machinery and electrical equipment of the whole valve cooling system in accordance with specific changes of the physical quantities, maximally ensure the reliability of the HVDC valve cooling system by a stable hot backup control subsystem, a control element and control programs, fully narrow the scope of accident, and prevent thyristor valve groups from being damaged due to the failure of the valve cooling system, thereby maintaining the safe, stable and reliable running of the thyristor valve groups.

A system for determining the vicinity of a communication device within a communication network is provided. Individual communication devices are provided with an active identification reader capable of reporting information concerning identified passive identification tags to a location server. At least some passive identification tags have fixed or known locations, allowing a communication device capable of reading such a passive identification1 tag to be determined to be within a particular vicinity or area. Communication devices may also be provided with passive identification tags to allow other active identification readers to determine whether the communication device is in their vicinity.

A relay agent device disposed in one of a plurality of networks each accommodating a terminal and an address leasing device performing an address lease service for the terminal, has a notifying unit notifying a proxy address leasing device, employed in common between the plurality of networks, of an address lease state of the address leasing device with respect to the terminal, a detecting unit detecting a fault in the address leasing device, and a transfer unit transferring a message related to the address lease, which is sent from the terminal, to the proxy address leasing device in order for the proxy address leasing device to take over an IP address lease service provided by the address leasing device when the fault is detected, and transferring a message related to the address lease, which is addressed to the terminal from the proxy address leasing device, to the terminal.

The invention discloses a power converter for a switch reluctance starter/generator, and belongs to the technical field of fault tolerant control of switch reluctance generators and design of power converters. The power converter adopts a power converter topology, and effectively combines a switching tube and a load switching tube of each bridge arm by adding six auxiliary switching tubes S1-S6 in the conventional asymmetrical semi-bridge power converter topology of the self-excitation mode so as to realize redundancy when any switching tube of each bridge arm fails; and the switching tube has high utilization rate and strong reliability. Aiming at different fault modes, the power converter can be applied to various different control strategies, realizes fault tolerant operation, greatly improves the generating property and reliability of a generating system, and is quite applicable to fault tolerant control for the switch reluctance starter/generator.

Embodiments of the invention relate to the field of cloud storage, in particular to a container technology-based memory access method and system. The system comprises a volume management module, a memory drive management module, an authority management module and a container arrangement module; wherein the volume management module is used for sending a volume creation request by a user through an interface or an API so as to realize the creation of different types of volumes, and managing the created volumes; the memory drive management module is used for receiving the volume creation request sent by the volume management module; the authority management module is used for calling an interface of Keystone so as to realize the authentication and authority management of the user; the container arrangement module is used for operating each memory drive at a corresponding calculation node in a container manner; the memory drives provide configuration files aiming at different arrangement frames; and the arrangement module calls APIs of the arrangement frames to realize the containerization and scheduling of each memory drive. According to the method and system, the high availability and load balance of each memory drive are realized.

In a network system in which a switch forwarding packets and a control server determining route information are separated, it is desired to achieve a redundancy of the control channel by an out-of-band control channel and an in-band control channel, when the switch receives a control message regarding the flow entry registration and the like based on the route information from the control server. Specifically, the separated switch and control server are connected by a control channel for sending and receiving the control message. The switch is not only connected to a control server via an out-of-band control channel by a route dedicated to the control message, but also connected to another control server via an in-band control channel by a route which is common with a normal data communication for determining the route information, to achieve a redundancy of the control channel.

Method, system and computer program to provide transparent scalability to Online Social Networks and better performance of its back-end databases, by an efficient partitioning of the underlying community structure and replicating of user profiles, ensuring that every user has a master or slave replica of all his neighbours on the same partition where he is located.

The invention relates to the technical field of coke oven baking process, disclosing an automatic detection and analysis system for temperatures at multiple points of coke oven baking. The automatic detection and analysis system comprises a thermoelectric couple, a compensation lead, a lower computer, a switch board and an upper computer, wherein the upper computer comprises an upper computer work station and a redundancy upper computer work station which are respectively connected with the switch board and respectively comprise a database, a real-time data acquisition module, a data conversion module and a data integrated processing module. According to the automatic detection and analysis system disclosed by the invention, the stability and the data analysis capability of the temperature detection and analysis system in the coke oven baking process can be improved; the process maintenance load, the management cost and the fault rate of equipment are reduced; the coke oven baking quality is improved; the function of full-automatic detection and analysis of temperatures at the multiple points of the coke oven baking is achieved; the actual temperature of a furnace body is ensured to be basically matched with a planned temperature curve; the daily expansion ratio of a coke oven building body is controlled within normal range; the smooth implementation of a coke oven process is ensured; and the quality of the coke oven body is improved.

The invention relates to a greenhouse intelligent drip irrigation device, which is characterized by comprising a hardware part and a software part; wherein, the hardware comprises six parts of modular design which are a back washing filter mechanism, a material liquid supplying mechanism, a material liquid mixing mechanism, a nutrition liquid drip irrigation mechanism, an electronic control mechanism and a nutrition liquid detection device; wherein, the back washing filter mechanism comprises a back washing device as well as a valve and a pressure sensor which are externally connected; the material liquid supplying mechanism comprises a mother liquor A1 supplying branch, a mother liquor B1 supplying branch and an acid/alkali liquid supplying branch which are connected in parallel; the material liquid mixing mechanism comprises a liquid storage tank as well as an upper cover and a stirring pump matched with the liquid storage tank; the electronic control mechanism comprises two control branches of a pump and a solenoid pilot actuated valve which are controlled by an industrial computer; the software part comprises the procedures of nutrition liquid detection and control; and the control procedure comprises a main procedure, four sub-procedures and a knowledge base.

The invention discloses a self-balance control method of a movable type inverted pendulum system. State signals of the movable type inverted pendulum system are collected, the filter processing data method with the combination of a wavelet topology network and a regulator is adopted, a signal fusion technology is used for assistance, input data, middle data and output data of each filter node where effective values of the wavelet network enter are continuously adjusted, the controlled system control number output by the system is completed, the stability and the reliability of work of an inverted pendulum are improved, and the driving and riding stability, safety and comfort of an electric riding tool based on the inverted pendulum system are improved. The invention discloses a self-balance vehicle intelligent control system. By the adoption of a filter processing unit and a signal fusion unit, the capacity of combined control and information feedback of an electrical system and a mechanical system are improved, tiny disturbance generated in the movement process of a self-balance vehicle is reduced, the intelligent degree is improved, the self-balance vehicle intelligent control system is convenient and easy to use, comfortable, stable and capable of reducing cost and improving the cost performance.

The embodiment of the invention discloses a method, apparatus and device for designing a network attached storage cluster, a computer readable storage medium and a network attached storage cluster system. The method comprises the following steps: setting corresponding virtual machines for controllers of local storage nodes in advance, mounting pre-customized centos mirror images in the virtual machines in advance, adding corresponding magnetic disks, and formatting the magnetic disks as local file systems; separately setting Gluster FS servers and Gluster FS clients for the virtual machines; when the storage nodes receive file access requests, sending the file access requests to kernel VFS layers, and sending the file access requests to corresponding Gluster FS clients via FUSE modules, sending the file access requests to target Gluster FS servers via TCP/IP, and finally sending the file access requests to the local file systems, so that the local file systems return the data corresponding to the file access requests to the storage nodes along the original paths to achieve data access. The reliability, availability and stability of the network additional storage cluster are improved.

The invention relates to a program synthesis system and a method applicable to networked intelligent digital media. The system comprises a disk array, a management server, a plurality of synthesis servers and a spliced server that are mutually connected by a network, wherein the disk array is internally provided with a storyboard database, a material database, a synthesized database, a spliced record database and a spliced completion database, and the management server is internally provided with an intelligent analysis engine, a service unit, a task monitoring unit and a file management unit. The intelligent analysis engine of the system can be split according to the storyboard complexity, a certain storyboard length and the quantity of configured servers. As a task type analysis device is adopted, the high-definition distinguishing is conducted on a task, the high-definition intelligent switching is supported, the working form of each server is automatically switched according to a synthesis target, the synthesis quality is ensured, the equipment redundancy is achieved due to the synthesis servers, and the safety performance of the system is improved.

The control station is based on a network node of FF protocol and it comprises control main station module based on FF protocol, universal I/O terminal base and various I/O modules. Each I/O module is connected to control main station module through the universal I/O terminal base. The control main station module is intelligent network communication device based on the FF protocol, which comprises two modules of I/O management and control as well as FF protocol communication. The first central precessor in charge of I/O management is connected in logic and adherence with the second one is charge of FF protocol communication module operation via dual mouth and control logic circuit to carry on data exchange i.e dual CPU structure is applied as embedding virtualizer of programmable algorithm functional block for finalizing operation of the said block.

The invention provides a multi-cloud-storage management system capable of improving storage availability. In order to overcome defects in the existing cloud storage uploading interface and multi-cloud-storage data management, the invention puts forward a multi-cloud-storage management system capable of improving storage availability, thereby improving data reliability, optimizing an uploading rate, eliminating repeated data in cloud storage, and providing a convenient directory structure management.

The invention discloses a method for controlling the parallel redundancy of an MVB master. According to the method, two identical VCM modules are used as bus master modules, and the two VCM modules are connected into a network system simultaneously and monitor the state of an MVB simultaneously; under the condition that a master module on the MVB has a failure or is lost, a standby main module conducts redundancy switch, becomes a bus master and takes over the MVB. The method for controlling the parallel redundancy of the MVB master has the advantages that the principle is simple, and the reliability and the usability of the whole network system can be improved.

The invention discloses a system and a method for downloading data. The system comprises a plurality of downloading groups, wherein each downloading group comprises an Linux virtual server LVS, at least two downloading nodes Nginx and a distributed file system HDFS; an Nginx operation system is used for mounting storage service of the HDFS through a user space file system FUSE; the LVS is used for receiving a download request from the user, performing scheduling selection for each Nginx and forwarding the download request to the selected Nginx; the Nginx are used for accessing data stored in the HDFS through the FUSE after receiving the download request forwarded by the LVS, and responding to the download request of the user; the HDFS is used for storing data. According to the method, the demand on download service under large storage data quantity, large file quantity and non-concentrated access hot spots of some service users can be met.

An intelligent housing system based on Internet of Things comprises an intelligent socket, an internet of things gateway, a two-dimensional code tag and a remote control terminal. The intelligent socket is connected with the internet of things gateway via a radio communication mode and is applicable to monitoring consumption power of a power device in real time and transmitting the consumption power of the power device to the internet of things gateway, the internet of things gateway is connected with the remote control terminal via the radio communication way and is applicable to transferring the consumption power of the power device to the remote control terminal and generating control signals changing operating states of the power device according to the remote control commands transmitted by the remote control terminal, the two-dimensional code tag is arranged on the surface of the internet of things gateway and is applicable to recording address of the internet of things gateway, and the remote control terminal is wirelessly communicated with the internet of things gateway by reading the two-dimensional code tag, displays the consumption power of the power deice to users and generates the remote control commands according to user operations. The intelligent housing system based on Internet of Things controls the operating states of the power device according to the consumption power of the power device.

The invention provides a method, a device and a system for connecting and switching a server. The method comprises the following steps: receiving a connection request sent by a front-end server, and establishing a long connection with the front-end server according to the connection request; according to a load balancing algorithm, determining a rear-end server which can interact data with the front-end server, and establishing the long connection with the rear-end server; receiving a rear-end server changing request transmitted from outside; according to the rear-end server changing request, during the period from a change starting time to a service stream holding time, forwarding a trading request packet which is sent to a change server by the front-end server to other rear-end servers re-determined by the load balancing algorithm, and sending a return packet which is fed back to the front-end server by the change server to the front-end server; and during the period from the service stream holding time to a change ending time, stopping communication with the change server. The method, the device and the system allow a trade which is being carried out by a client to be normally carried out when one end server is stopped to be maintained or switched.

The invention provides a satellite-borne clock redundant system and method. The satellite-borne clock redundant system and method are used for providing a system clock for a spaceflight control system. According to the system and method, an external high-accuracy clock and two internal clocks sources of which are not the same serve as a main clock, a backup clock and a third-party clock respectively, the third-party clock can be adopted for arbitration only when the main clock and the backup clock are inconsistent, single-redundancy faults of the clock can be allowed, the tri-redundancy aim is achieved, implementation is simple, and cost is low. According to the satellite-borne clock redundant system and method, the clock redundancy function of a control system is achieved through the high-accuracy clock of an inertia unit and the two clocks in a flight control computer, the high-accuracy clock of the inertia unit is sufficiently used, influences of faults of the clock on running of the control system are avoided, the reliability and the safety of the control system can be improved, and the satellite-borne clock redundant system and method have the advantages of being low in implementation cost and facilitating engineering realization.

The invention discloses a method for achieving dual-network hot standby redundancy of a blank pipe automatic system. The method comprises the steps of establishing network hardware connecting topology, establishing network state monitoring process in an application layer of a control procedure of each machine, establishing a working net switching control procedure in a network monitoring procedure of each machine, establishing a redundancy sending operation procedure at the data sending end of each machine, establishing a data filtering control procedure at the receiving end of each machine, establishing a network state monitoring terminal and the like. The method has the advantages that a distributed network monitoring mechanism is adopted, the network state is monitored in real time, and the automatic switching speed of a network is high; two three-layer exchangers are in cascade connection so that when one of the networks of each machine is normal, communication between the two sides can be conducted and the cross fault can be avoided; in terms of data transmission, data are simultaneously sent to the main network and the standby network of each receiving end by one sending end, and redundancy of the data on the main network and the standby network is achieved; due to the filtering of data numbers and timestamps, a repeat and leakage of data receiving are avoided and the effectiveness and the seamlessness of switching are guaranteed.

The invention discloses a rocket ground test control system based on a redundant structure. The rocket ground test control system based on the redundant structure comprises a front-end sending controlling PLC unit, an optical terminal machine unit, a rear-end interchanger unit and a main control computer. The front-end sending controlling PLC unit comprises two redundantly configured front-end PLC sub-systems and at least two bus stations, wherein the two front-end PLC sub-systems are connected with the bus stations respectively, the bus stations are sequentially connected with other bus stations, the two front-end PLC sub-systems are respectively provided with a CPU module and at least one input module, the two CPU modules are mutually connected, all the input modules simultaneously receive the same way of input signals, and each bus station is respectively provided with at least one output module. The rocket ground test control system based on the redundant structure has the advantages of achieving redundancy, improving the reliability of a test process and reducing the possibility that a single-point failure mode occurs.

A blower filter device includes a blower unit that draws and delivers ambient air; a filter unit that filters a harmful substance, or a filter coupling to couple and uncouple the filter unit. A control unit is configured to actuate the blower unit, to determine an operating state of the blower filter device and/or other respirator system components and/or a respirator system (100) as a whole and to generate an alarm if a determined operating state indicates a disturbance. An output unit is configured to receive the alarm from the control unit and to output the alarm. A communication interface (228) is configured for wireless network integration and to transmit the alarm via the network (238). A respirator system (100) with such a blower filter device, an operational infrastructure (300) with such a respirator system, as well as a method of blower filter operation and operational infrastructure monitoring are provided.