Product
Patsnap Eureka
For R&D, Patsnap Eureka makes reading and utilizing patents & technical documents easy.
Patsnap Eureka AIR
Designed for self-driven R&D workflows. Generate viable solutions, solve complex R&D challenges, empower your innovation with AI.
Patsnap Eureka Materials
Designed for material experts only. Revolutionize your material R&D, from search, analyze, to developing new materials.
Feature
TechResearch
Generate reliable direction feasibility study reports for your R&D in just a few steps.
TechSeek
Discover and master advanced knowledge NOW. Basics, ideas, possibilities, all at once.
TechMind
As an expert in R&D Theories, TechMind can generates customized viable solutions instantly.
TechRisk
Analyze your overall solution with one click, know your potential R&D risks in advance.
TechMonitor
Get weekly tech updates, stay abreast of the latest tech innovations and key insights.
Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
371 results about "Star network" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
A star network is an implementation of a spoke–hub distribution paradigm in computer networks. In a star network, every host is connected to a central hub. In its simplest form, one central hub acts as a conduit to transmit messages. The star network is one of the most common computer network topologies.
Wireless metropolitan area network system and method
InactiveUS20040022222A1Network topologiesTime-division multiplexAccess networkWireless metropolitan area network
A system and method are disclosed for providing a high speed wireless network. In one embodiment, a network is configured in a star configuration having a single router at the center. A Metropolitan Access Network (MAN) is configured with a plurality of access points that provide a wireless interface using defined physical layer and Media Access Control (MAC) layer. Packet data delivered to and from the access points are connected to the single router using a plurality of layer two links, which may include point to point links and packet switches. All links within the network operate at layer two or below and do not modify the packet data. The single router at the center of the MAN star network uses layer three information to direct packets between Local Area Networks (LANs) or sub-networks connected to different ports on the router.
Owner:VUIT
Internet of things networking method and system thereof
InactiveCN101873343AImplement hostingRealize intelligent controlNetwork topologiesTransmissionAutomatic controlStructure of Management Information
The invention relates to an internet of things networking method and a system thereof. The system comprises an internet or mobile internet, a plurality of network elements connected with the internet or mobile internet in parallel, clients respectively communicated with the internet or mobile internet, and a cloud server. Each network element comprises a network element controller, and a plurality of devices which are of a star network topological structure and are contacted with the network element controller. The relevant information of the devices in the network element is stored in the cloud server. The clients can directly operate the network element controller, or visit and control the devices in the network element through the internet or mobile internet, or place the devices under trusteeship through the cloud server to realize the automatic and intelligent management of the devices. The internet of things constructed by the invention is an open and diversified network, users can control and monitor any device and can inquire and share information as long as the device joins in the network, and thereby the automatic control, the user control under trusteeship and the authority-based information share in the entire network are realized.
Owner:罗李敏 +1
Multi-core DSP (digital signal processor) system-on-chip and data transmission method
InactiveCN102521201ASimplified Access to ArbitrationReduce synchronization operationsMemory adressing/allocation/relocationDigital computer detailsStreaming dataDigital signal processing
The embodiment of the invention provides a multi-core DSP (digital signal processor) system-on-chip and a data transmission method. The system comprises a main processor, multiple slave processors and an external memorizer, wherein each main processor and slave processor respectively comprise a processor core, a memorizer-on-chip and a direct memory access (DMA) controller, the main processor controls and accesses the external memorizer through an I / O (input / output) controller, data exchange can be realized among processors through an internet-on-chip, wherein the internet-on-chip is composed of a star network, a loop network and a serial network. The internet-on-chip provided by the embodiment of the invention combines the star network, the loop network and the serial network, so that the internet-on-chip can not only provide streaming data transmission with high bandwidth, but also provide short message transfer with low delay. Besides, the embodiment of the invention simplifies the access arbitration of the external memorizer through the software control of the main processor, reduces the synchronous operations among the multi-core processors through the network data buffer and lowers the complexity of the program design of the multi-core processors.
Owner:刘大可
Distributed database parallel processing system
InactiveCN102033889AEasy to debugImprove reliabilityTransmissionSpecial data processing applicationsComplete dataData set
The invention discloses a distributed database parallel processing system. The technical scheme is: a distributed parallel database controllable redundancy structure is adopted, and different types of database server nodes are used (full database servers, non-full database servers and void database servers). The database cluster mainly comprises non-full database servers which store partial data of the database cluster to share the work load; and multiple non-full servers constitute multiple complete data sets through the void database servers which ensure the completion of the data sets in function. The full database server can independently provide the completion of the data sets. The void database servers select server nodes in the database cluster to form a star network covering all data and used for retrieving all data in the database cluster and dynamically linking the data areas on multiple database server nodes.
Owner:熊凡凡
Star quantum key distribution network still capable of ensuring safety without trusted relay
ActiveCN106209361AImprove securityReduce consumptionKey distribution for secure communicationResource consumptionStar network
The invention discloses a star quantum key distribution network without a trusted relay based on a MDIQKD protocol. The star quantum key distribution network disclosed by the invention is expanded into a star network structure based on a point-to-point MDIQKD system; therefore, network resource consumption is saved; and the difficulty due to network expansion can be solved. According to a light source structure provided by the invention, equipment used in a time feedback scheme, a phase feedback scheme and a polarization feedback scheme is simple and reusable; therefore, the quantum key distribution network is relatively simple, relatively easy to integrate and low in cost; furthermore, feedback requirements can also be reduced through further optimization; and thus, the foundation is laid for further realizing safety, high-speed, large-scale engineering treatment and practicability of quantum secret communication.
Owner:UNIV OF SCI & TECH OF CHINA
Method for precisely synchronizing time of industrial wireless network on basis of prediction and compensation
The invention relates to technologies for industrial wireless networks, in particular to a method for precisely synchronizing time of an industrial wireless network on the basis of prediction and compensation. The method includes constructing the factory-automation-oriented industrial wireless network into a star network on the basis of an IEEE (institute of electrical and electronics engineers) 802.11 single-hop basic service set (BBS) structure; setting a master clock and slave clocks according to types and functions of nodes in the industrial wireless network; enabling a master clock side and slave clock sides to interact with one another via two-way timestamp information and computing a time deviation value of a current synchronizing cycle; predicting a time deviation value of a next synchronizing cycle by the aid of the time deviation value of the current synchronizing cycle; compensating clock drift by the aid of the predicted time deviation value of the next synchronizing cycle and correcting the clocks. The method has the advantages that the method is implemented on the premise that application requirements of factory automation are sufficiently considered, so that high time synchronization precision can be realized by the aid of few wireless communication resources, and purposes of high precision, high efficiency, low expenditure and easiness in implementation can be achieved.
Owner:SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
PSInSAR deformation estimation method applicable to complex urban area infrastructure in windy and rainy conditions
InactiveCN106940443AFit closelyImprove estimation robustnessRadio wave reradiation/reflectionLayoverCompressed sensing
The invention relates to the technical field of synthetic aperture radar interferometry, and specifically relates to a PSInSAR estimation method applicable to complex urban area infrastructure in windy and rainy conditions. The method includes following steps: performing data preprocessing on InSAR data; establishing a Delaunay triangulation network and an adaptive encryption network; estimating an arc segment relative parameter through a robust estimator; performing Tikhonov regularization adjustment operation; establishing a local star network; recognizing single PS points and layover PS points; calculating the single PS points in remaining pixels through the robust estimator, and detecting the layover PS points through a compressed sensing algorithm; and outputting heights and deformation results of the single PS points and the layover PS points. According to the method, combined calculation of the single PS points and the layover PS points is realized through mixed network establishment without removing the atmosphere in a global manner, a temperature non-linear deformation model is introduced, the fitting degree of the time sequence phase is improved, accurate estimation of the PS points is realized by employing the robust estimator, and the layover PS points of the complex urban environment are extracted by employing super-resolution MD-TomoSAR imaging.
Owner:洪都天顺(深圳)科技有限公司
Embedded intelligent monitoring and remote maintaining system of manufacturing equipment
ActiveCN103149901AReduce power consumptionMeet real-time processing needsTotal factory controlProgramme total factory controlReal-time dataData acquisition
The invention discloses an embedded intelligent monitoring and remote maintaining system of manufacturing equipment. A remote maintaining center and an embedded intelligent monitoring and maintaining unit which is installed at a different place constitute a star network, wherein the embedded intelligent monitoring and maintaining unit comprises a micro controller, a data acquisition module, a data interaction module, a man-machine interaction module and a data memory module, and the remote maintaining center comprises a system state monitor, an equipment fault diagnosis module and an equipment management module. The embedded intelligent monitoring and remote maintaining system has a man-machine interaction function, is wide in application occasion, and can well conduct real-time data processing.
Owner:NANJING UNIV OF SCI & TECH
Method for differentially private aggregation in a star topology under a realistic adversarial model
ActiveUS20180101697A1Key distribution for secure communicationDigital data protectionPattern recognitionData privacy protection
One embodiment provides a system for noise addition to enforce data privacy protection in a star network. In operation, participants may add a noise component to a dataset. An aggregator may receive the noise components from the plurality of participants, compute an overall noise term based on the received noise components, and aggregate values using the noise components and overall noise term.
Owner:XEROX CORP
Wireless sensor network protocol based on institute of electrical and electronic engineers (IEEE) 802.15.4
InactiveCN102404855ASimple structureHigh packet transfer rateEnergy efficient ICTNetwork topologiesWireless dataBeacon frame
The invention relates to a wireless sensor network protocol based on institute of electrical and electronic engineers (IEEE) 802.15.4. A central coordinator and at least one terminal node form a star network, each terminal node establishes connection with the central coordinator through a single hop to realize dual-way transmission of wireless data, each terminal node and the central coordinator are in line with a communication protocol, a communicated superframe comprises a plurality of time slots with equal set time, a first time slot when the superframe starts is a beacon frame when the central coordinator starts to broadcast to outside, time synchronization among the terminal nodes in a network is realized by monitoring the beacon frame, thereafter the terminal nodes realize dual-way communication with the central coordinator in two pre-distributed adjacent time slots according to a time sequence, the terminal nodes are in dormant and waiting states after communication and wait for being woken by an initial beacon frame of the central coordinator. The wireless sensor network protocol has the advantages of simple structure, dual-way data transmission, high reliability, determined communication time and the like, the packet transmission rate is high, and the power consumption of the nodes is low.
Owner:SHANGHAI INST OF PROCESS AUTOMATION & INSTR
Dynamic Designation of a Central Distributor in a Multi-Participant Conference
ActiveUS20110252090A1Reduce the amount of calculationOptimize audio processingMultiplex system selection arrangementsSpecial service provision for substationNetwork communicationDistributor
Some embodiments dynamically designate one of several network nodes as a network hub of a star network, at the start of a network communication session among the several network nodes that is facilitated by a mesh network and the star network. Some embodiments dynamically designate a new network hub when the previously designated network hub leaves the communication session, which continues among the other network nodes. Different embodiments use different techniques to dynamically designate the network hub of the star network. For instance, some embodiments use communications transmitted along the mesh network to dynamically identify the network hub at the start of the network communication session or after the departure of a previously designated network hub.
Owner:APPLE INC
Parameter adaptive adjustment method of wireless sensor network
InactiveCN109462858ASatisfy validitySatisfy latency requirementsNetwork topologiesQuality of serviceWireless mesh network
The invention discloses a parameter adaptive adjustment method of a wireless sensor network. A star network topological model is used; the sensor network is composed of a sensor node and a coordinator; the node is used for collecting sensor data; and the coordinator is taken as a convergence device of the whole sensor network, and is used for collecting the sensor data uploaded by the node. An 802.15.4 protocol based on a time slot CSMA / CA is adopted in communication of the wireless sensor network, and a Q-learning algorithm is used to dynamically optimize parameter settings of the protocol, so that the problem of adaptability of the 802.15.4 protocol to a position network environment can be effectively solved; while the quality of network service is improved, the overhead of the network is effectively reduced; and thus, the parameter adaptive adjustment method is an optimization method of the wireless sensor network with strong adaptability, high timeliness and good quality of service.
Owner:BEIJING UNIV OF POSTS & TELECOMM
Green house varying structural self-organizing radio sensor network and constituting method
InactiveCN101021729AShort communication distanceReduce energy consumptionEnergy efficient ICTTemperatue controlElectricityGreenhouse
This invention relates to greenhouse variable structure self-organizing wireless sensor network and its building method, which sets up the convergence nodes during the mobile process, the sensor and control nodes within the coverage to form Star network, and then the convergence nodes connects the control site and control center in turn. It lays the plastic track and wire of toughness as Live Wire lanyard on the top of greenhouse, fixes the aggregation nodes on the lanyard with both ends of wheel connecting electricity, installs cooling fins and fans on the aggregation nodes, to dynamically collect the greenhouse surrounding parameters acquired by different sensor nodes through aggregation nodes, and then sent to the control site, and the instructions issued by the control site is sent to the control nodes through the aggregation nodes.
Owner:JIANGSU UNIV
Photonic integrated circuit device and elements thereof
InactiveUS20060159387A1Improve functionalitySimple structureCoupling light guidesOptical waveguide light guideTransceiverNetwork architecture
A photonic integrated circuit (PIC) device is described. The PIC device includes a set of optical transceivers including optical transmitters and optical receivers, and an embedded optical interconnect mesh operatively associated with the set of optical transceivers and structured to enable at least one of the following network architectures: a star network architecture, a bus / broadcast network architecture, and a ring network architecture. Related apparatus and methods are also described.
Owner:HANDELMAN DORON
Logical star topologies for non-star networks
ActiveUS7269177B2Avoid many problemsSimplify routingStar/tree networksAuto-configurationProcessing cost
A logical star architecture imposed on an underlying non-star network, for example a Virtual Path Ring (VPR), enhances a mesh protocol with an automatic method for Virtual Path ID (VPI) generation. The VPIs are used by the mesh protocol's inherent routing function to effect automatic configuration at installation, automatic reconfiguration at node updates, and automatic reconfiguration for protection switching. The imposition of the logical star architecture on a VPR reduces node-to-node switching costs (e.g., delay, as well as memory and processing costs) since all nodes in a logical star topology are at most two logical hops away. The logical star also conserves virtual path address space relative to a fully configured ring. Additionally, the imposition of the logical star architecture allows existing star functions to be deployed on the underlying network. Finally, when the underlying architecture is a ring, the protection advantages of ring networks can be preserved.
Owner:LUCENT TECH INC +1
Star-cluster double-loop on chip network topology construction
InactiveCN101420355AShort communication distanceSimple designNetworks interconnectionExtensibilityInterconnection
The present invention provides a network topology structure on a star-cluster double-loop (SCDL), and the structure consists of 4m*2k processing units and 4m switching nodes, wherein, each 2k processing units are connected to form a star network topology structure, therefore, 4m star structures are formed; switching nodes of the 4m star structures are connected to form DL (2m) interconnection network topology structures. The present invention has the characteristics of canonicity, symmetry, planarity, excellent extendibility, lower network cost, simple switching nodes and simple routing policy. According to the present invention, a switching node is connected with four processing units, therefore, communication distance between processing units is reduced, localization feature of the system is improved, delay of the system is reduced and throughput of the system is improved. A novel Johnson coding method can be adopted by the switching nodes and processing units of the present invention, and the method make the coding of the switching nodes and processing units imply information of adjacent nodes and links of the interconnection network; therefore, the route algorithm design is simple.
Owner:XIAN UNIV OF POSTS & TELECOMM
Star-network-based BDS/GPS broadcast type network RTK algorithm
ActiveCN107797126ARedundant observationsUnlimited capacitySatellite radio beaconingAviationPrimary station
The invention discloses a star-network-based BDS / GPS broadcast type network RTK algorithm. All base stations form a triangulation network based on a Delaunay triangulation algorithm; and a controllable full-region star network formed by a plurality of star network elements is generated based on the triangulation network. Data of the base stations are obtained in real time and network element calculation is carried out to generate a baseline atmospheric error. Meanwhile, a server side broadcasts a main station observation value, a base station coordinate and the baseline atmospheric error to auser by using the star network as a unit based on a UDP protocol; the user selects one network element based on an own approximate position and the position of the main station; interpolation is carried out on an inter-station single-difference atmospheric error of the baseline formed by the user and the main station and the obtained atmospheric error is corrected to the observation value of the main station to carry out baseline calculation. Besides, the user also can uploads an approximate coordinate by two-way communication and the server side broadcasts difference data of the network element in which the user is located. And difference data broadcasting by equipment like ground equipment, an aircraft or a satellite is also supported.
Owner:SOUTHEAST UNIV
Satellite communication networking system and working method thereof
ActiveCN106685517ARealize partition/level managementAchieve "flat" optimizationRadio transmissionCode division multiple accessCarrier signal
The invention discloses a satellite communication networking system and a working method thereof. According to the technical scheme, communications are conducted among a central satellite master station, a distributed-type central satellite station, and a common satellite station through an asynchronous time division multiple access network; an acentric and asynchronous accessing mode is adopted in the asynchronous time division multiple access network, a time division multiplexing mode is adopted in a forward link, and the asynchronous time division multiple access network is applicable to a star network and mesh network topological structure networking form; communications among a small-aperture antenna satellite station and other satellite stations are conducted through a small-aperture antenna satellite station backhaul network; the small-aperture antenna satellite station backhaul network receives forward carrier wave data of the asynchronous time division multiple access network and is used for forward communication of the small-aperture antenna satellite station and receiving of high-speed large capacity data, a reverse link is hauled back through an individual carrier wave, and multiple access is achieved since the reverse link supports code division multiple access, frequency-division multiple access and time-division multiple access networks. According to the satellite communication networking system and the working method thereof, dynamic regulation management of system sources can be conducted according to changes of transmitted business data.
Owner:北京中科星通技术有限公司
Electric power carrier communication routing method
InactiveCN102932257ASolve the problem that additional repeaters need to be addedExcellent pathData switching networksRouting tableMesh routing
The invention discloses an electric power carrier communication routing method. A network node needing routing broadcasts a routing request message to surrounding nodes, each middle node records the address and the routing cost of a next hop in a respective routing table, after the request message arrives at a destination node through a certain path, the destination node selects an optimal path according to different routing costs of different paths, and the destination node initiates a routing response and the routing response can return back a source node through the shortest path. According to the method provided by the invention, a routing cost algorithm in an MESH routing technology is realized. The nodes in a network have a relay function, so that the problem that repeaters are required to be additionally added in a star network architecture is solved. Under the strong support of the MESH network topology structure and each full-function network node, each node in the method further has an ad-hoc networking function, along with the change of environments, the node can flexibly choose routing according to the routing cost among the nodes, and thus, the condition that a path is optimal in any environment at any time can be guaranteed.
Owner:WASION GROUP HLDG
Star network and method for preventing a repeatedly transmission of a control symbol in such a star network
ActiveUS20100262689A1Avoid spreadingEasy fault detectionMultiple digital computer combinationsStar/tree networksComputer networkProtection mechanism
A star network (1) having a star coupler (14) and at least a first and second network branch (112, 122), wherein each network branch (112, 122) comprises at least one network node (110, 120) and a bus driver (11, 12) connected between the star coupler (14) and the at least one network node (110, 120). A first bus driver (11) of the first network branch (112) is adapted to detect a symbol pattern comprising at least two predetermined equal control symbols, which are transmitted from the first network node (110) to the second network node (120), wherein a control symbol is part of a control pattern. The control pattern is used to force at least the second network node (120) to switch into a predetermined state. The first bus driver (11) is disabling the first network branch (112) from the star network (1) based on whether the transmitted symbol pattern is detected. By using the protection mechanism a reliable detection of babbling idiots is provided. Moreover, in case of detecting such babbling idiots the remaining network nodes are separated and the network can operate without being influenced by the faulty network node.
Owner:NXP BV
Airborne ultrashort wave multimedia communication system
An airborne ultrashort wave multimedia communication system comprises a communication central station and a plurality of client terminal stations, wherein the communication central station is communicated with each client terminal station in an ultrashort wave wireless channel two-way mode, the communication central station, the client terminal stations and ultrashort wave wireless channels are together combined to form a star network framework, the communication central station and the client terminal stations are communicated directly, and the client terminal stations are mutually communicated and connected through the communication central station. The airborne ultrashort wave multimedia communication system is suitable for reliable stable networking communication under the conditions of helicopter airborne high-speed high dynamic and high-complexity terrain environments and supporting a plurality of communication nodes to construct multiple service communications such as networks, supporting images, telephones and data in a star networking mode. The airborne ultrashort wave multimedia communication system can be not only used under certain environments of landing ground of an aerospace engineering returning capsule, but also used under the conditions sun as salvage, mountain area rescuing, real-time reporting of city large-scale activities and competitions and the like.
Owner:SHANGHAI JIAO TONG UNIV
Local dormancy awakening method for CAN bus star network management architecture scheme
ActiveCN109327372AReduce in quantityReduce power consumptionBus networksElectricityNetwork management
The invention discloses a local dormancy awakening method for a CAN bus star network management architecture scheme. The method comprises the following steps that a CAN network management message anda plurality of controllers corresponding to multiple operations are provided, wherein the CAN network management message is based on an OESK network management message format and is provided with a destination address (DA) and a network management state bit CF; and when a vehicle executes the operation, only the controller related to the operation is awakened by the CAN network management message,and the controller unrelated to the operation is not awakened and is still in a dormant state in order to reduce the number of the awakened controllers. According to the method, the number of the awakened controllers is reduced to the minimum value through the local network dormant awakening, and the lack of electricity of a storage battery is effectively prevented.
Owner:ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
Remote wireless meter reading system
InactiveCN101459977AGood effectNetwork topologiesData switching by path configurationData terminalStar network
Owner:SHANGHAI MUNICIPAL WATER RESOURCES DEV & UTILIZATION NAT ENG CENT +2
Rate-Controlled Optical Burst Switching
InactiveUS20070115956A1Multiplex system selection arrangementsNetwork traffic/resource managementOptical burst switchingEdge node
Owner:RPX CLEARINGHOUSE
Template based task scheduling strategy in cloud computation environment
InactiveCN105912390AOptimize completion timeProgram initiation/switchingTask completionTemplate based
The invention discloses a template based task scheduling strategy in a cloud computation environment. The template based task scheduling strategy includes: establishing a star network; allowing an initial position to be at a scheduling node P when a task reaches a cloud platform; acquiring mappings of each task and each processor through the scheduling node by adoption of a sum scheduling algorithm according to the states of a current task set and a current processor cluster; and then sending each task to one corresponding processor through the network and operating each task, wherein the end time of task operation is the finish time T of the task generated by the scheduling algorithm. The beneficial effects of the template based task scheduling strategy are that: a new task scheduling method is provided from a new view; compared the conventional method, the method performs pretreatment on parameters, obtains an optimal template from a whole situation, and performs a target scheduling; and the finish time of the task set can be greatly optimized in the cloud computation environment.
Owner:SICHUAN UNIV
Low-power-consumption remote wireless transmission system
InactiveCN107580362ALow costEasy networkingPower managementNetwork topologiesTransport systemWireless transmission
The invention discloses a low-power-consumption remote wireless transmission system, comprising a main MCU, a plurality of branch MCUs and radio frequency chips corresponding to the MCUs. The main MCUand the corresponding radio frequency chip form a wireless transmission center node. The plurality of branch MCUs are connected with the corresponding radio frequency chips to form wireless transmission subnodes. The radio frequency chips correspondingly connected with the MCUs are wireless radio frequency transceiver chips based on a LoRa technology. A star network topology structure is employedbetween the center node and the subnodes. The center node and the subnodes are networked through adoption of a TDMA medium access layer protocol. The subnodes finish collecting data and send the datato the center node in corresponding time slots. The center node gathers the data and is connected with a host. The data is displayed by the host. The subnodes ensure the low power consumption of networking in an RTC clock automatic wakeup mode, and moreover, through matching of a frequency hopping communication technology, the same frequency interference problem of the wireless transmission system is reduced. According to the system, a demand of an Internet of things application for power consumption and distance is satisfied, and the system can be widely applied to smart city projects such as smart parking and intelligent meter reading.
Owner:SOUTHEAST UNIV
Short-circuit current computing method for ring-shaped ship power grid
According to the structure characteristic of an alternating current region power supply system of a ring-shaped bus, through improvement on several short circuit computing methods which are widely used in the prior art at home and abroad, the original short circuit current computing method for a tree-shaped power grid is deformed into a short-circuit current computing method suitable for a ring-shaped ship power grid. The method comprises the following steps of: firstly, computing the short-circuit current of a simple grid by a star-network transformation and local equal effect method; and secondly, providing a method in which a line impedance matrix is obtained by a graph theoretic approach and then the short circuit current is calculated. According to the method, the short-circuit current computing method for a ship ring-shaped region power distribution system can be explored, the thermal stability and power stability checkout when types of the equipment are selected can be realized, and the basis can be provided for fault protection when the equipment runs.
Owner:JIANGSU UNIV OF SCI & TECH
Message routing method based on MQTT (Message Queuing Telemetry Transport) multi-layer cascade
ActiveCN107231262AEasy to controlEasy to manageStar/tree networksNetwork connectionsMessage routingNetwork control
The invention discloses a message routing method based on MQTT (Message Queuing Telemetry Transport) multi-layer cascade. The method comprises the steps of performing MQTT-based multi-gateway networking; performing routing down based on the MQTT-based multi-gateway networking, to route a message sent by an MQTT control end to a household appliance; and performing routing up based on the MQTT-based multi-gateway networking, to route a feedback message of the household appliance to the MQTT control end. The method improves the centralized star network topology of an MQTT protocol, supports the gateway topology of multi-layer cascade, supports multi-gateway connection networking and message routing, solves the problems of multi-gateway connection, communication and management of current smart home, and supports dividing household appliances into different areas for secure and fast internal network control and small-range management according to custom rules in the family.
Owner:SOUTH CHINA UNIV OF TECH
Intelligent streetlamp control system
ActiveCN106304501AReduce sources of interferenceStable and reliable signal transmissionMechanical apparatusMeasurement devicesData acquisitionNetwork architecture
The invention discloses an intelligent streetlamp control system. The intelligent streetlamp control system comprises a control terminal, a server, a wide area network, an intelligent streetlamp local area network and an intelligent LED streetlamp, wherein data exchange between the control terminal and the intelligent streetlamp local area network is performed by the server and the wide area network so as to control a single intelligent streetlamp connected to the intelligent streetlamp local area network, the intelligent streetlamp local area network adopts a radio frequency wireless communication mode based on 780MHz and is combined with a fundamental layout of a star network architecture, a few sources interfering a wireless channel and stable and reliable signal transmission are ensured, the consistency in time of issuing operation commands of turning on / off the lamp and dimming is also ensured, the site control effect is uniform, and no obvious delay is generated; and meanwhile, a single lamp controller, a gateway controller, a concentrated controller and a data acquisition module are integrated in the intelligent LED streetlamp, an adjustment instruction of the control terminal can be received, ambient information can also be acquired as a feedback, and intelligent city management is achieved.
Owner:泰州市华强照明器材有限公司
Field bus communication system based on RS485 protocol
ActiveCN103716219AReduce resource consumptionThe underlying driver is simpleData switching networksCommunications systemControl signal
The invention discloses a field bus communication system based on an RS485 protocol. The system comprises an industrial personal computer core ARM, a master station, slave stations and slave station expansion sub board cards. The industrial personal computer core ARM and the master station are connected through a data bus, an address bus and a reading and writing control signal line. The master station and each slave station are connected through an RS485 communication cable to form a star network topology structure. An RS485 conversion chip is used for carrying out differential conversion on a transmitted signal between the master station and each slave station and then carrying out transmission through the communication cables. Each slave station and each slave station expansion sub board card are connected through a data bus, an address bus and a reading and writing control signal line, so that information interaction between each slave station and each slave station expansion sub board card is realized. According to the invention, the field bus communication system has the advantages of less resource consumption, simple bottom drive and the like, and has a considerable application value for an industrial automation control system.
Owner:HUAZHONG UNIV OF SCI & TECH
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Patsnap Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com