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51results about How to "Strong redundancy" patented technology
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Information intelligent terminal system of EtherCAT field bus
InactiveCN103439951AImprove performanceImprove efficiencyTotal factory controlProgramme total factory controlPrimary stationBus interface
The invention discloses an information intelligent terminal system of an EtherCAT field bus. The information intelligent terminal system of the EtherCAT field bus comprises an EtherCAT primary station and information intelligent terminals provided with EtherCAT bus ports, the EtherCAT primary station and the information intelligent terminals are connected through EtherCAT field buses, and the information intelligent terminals provided with the EtherCAT field bus ports are connected through the EtherCAT field buses. The Information intelligent terminal system of the EtherCAT field bus can be in a continuous woking state for a long time, can directly collect, transmit and monitor workshop production information, is beneficial to achievement of networked information interaction inside an enterprise, has the advantages of having flexible network topology structures, simple system configuration and high-speed and efficient data communication, and meets real-time, high-speed and efficient management of workshop production information in the automation control field.
Owner:SOUTH CHINA UNIV OF TECH
Museum monitoring system based on ZigBee
InactiveCN104065751ASimple networkingEasy maintenanceNetwork topologiesTransmissionRadio frequencyMutual information
The invention discloses a museum monitoring system based on ZigBee. According to the system, in the complex communication environment of a museum, upper computers conduct real-time positioning on induction bracelets embedded with ZigBee radio frequency chips according to an optimized RSSI range finding algorithm and a mass center positioning model, with the help of the forwarding function of a ZigBee coordinator, the upper computers and various sensors on lower computers conduct mutual information feedback, and therefore internal environment variables of the museum are monitored and tourists, especially children and special staff are accurately positioned. The museum monitoring system based on the ZigBee wireless technology is free of wiring, easy to operate and large in network capacity, and has the advantages that staff filing is convenient, the tourist distribution condition inside the museum is accurately counted, the number of people simultaneously entering the museum is increased, the change of internal environmental parameters is accurately monitored, and safety of collected exhibits is guaranteed.
Owner:罗梓杰 +1
A screen information leakage tracing system and method
ActiveCN109727180ARealize accountability afterwardsReduce visual distractionsImage data processing detailsTemporal informationClient-side
The invention discloses a screen information leakage tracing system and a screen information leakage tracing method. A system architecture that client screen information carries out watermark embedding and a server cooperates with an original business system to carry out centralized management and control is provided. The system comprises a screen watermark generation module, a Screen watermark display module, a server management and control module, a watermark information extraction module and a watermark information query module, can encode the equipment number, the user information and thetime information, can generate a screen watermark image, update the screen watermark image in real time, link the screen watermark image with a service system, and control the screen watermark image to be displayed on a client screen when a client views or modifies sensitive information. When screen information leakage occurs, the screen watermark information in the screen information leakage is extracted according to the obtained screen shot and screen shot images, secret divulging personnel and secret divulging time can be reliably traced, and sensitive information safety of enterprises or departments is protected.
Owner:CHENGDU YUFEI INFORMATION ENG
High-density cabinet energy-saving power supply device based on dual input power supplies
InactiveCN104199534AReduce consumptionMake the most ofVolume/mass flow measurementPower supply for data processingElectricityPower cable
The invention discloses a high-density cabinet energy-saving power supply device based on dual input power supplies. With central power supply and a dual input power module, the high-density cabinet energy-saving power supply device structurally comprises a power cabinet; a plurality of dual input power modules are centrally disposed inside the power cabinet, the power cabinet is provided with two mains supply input terminals, output terminals and a reserved socket allowing a PDU (protocol data unit) function, a power cable of each dual input power module is directly distributed in the power cabinet, the power cabinet can be powered through the mains supply input terminals and an industrial connector, and power is output through the output terminals. The high-density cabinet energy-saving power supply device has the advantages that fewer cables are distributed, and the trouble of sorting the cables is omitted; fewer power modules are used, and cost is significantly reduced; the power modules can run under optimal efficiency, energy consumption is significantly reduced, and a power supply system is higher in redundancy and stability.
Owner:LANGCHAO ELECTRONIC INFORMATION IND CO LTD
New-energy automobile limping mode control method and system
The invention discloses a new-energy automobile limping mode control method and system. The method comprises the steps that if a power battery breaks down, a relay is turned off; if an engine runs, the whole automobile enters a hybrid mode; if the engine is not started, and when a coupler has a disconnection fault, the whole automobile stops; when the coupler has no disconnection fault, the engineis started; under the hybrid mode, according to the working state of a whole automobile motor and a controller, the running state of the engine and the working state of the coupler, the voltage closed-loop stopping state is calculated, and if the voltage closed-loop stopping is activated, the automobile enters the non-voltage closed-loop limping mode; if the voltage closed-loop stopping is not activated, when the rotating speed of the motor is smaller than the preset rotating speed, the automobile enters the non-voltage closed-loop limping mode, and when the rotating speed of the motor is notsmaller than the preset rotating speed, the automobile enters the voltage closed-loop limping mode; according to the method and system, flexible configuration can be performed according to the actualcondition, the redundancy is high, after the power battery failure is cut off, the whole automobile enters the safety controllable mode, and the safety of the whole automobile and passengers is ensured.
Owner:CHONGQING CHANGAN AUTOMOBILE CO LTD
APT defense system and defense method based on system elasticity
InactiveCN108462714AIncrease elasticityImprove adaptabilityDigital data protectionTransmissionSystem integrityData library
The invention relates to the technical field of network security, and in particular relates to an APT defense system and an APT defense method based on system elasticity. In the defense method, data in a database is divided into key data and non-key data; distributing the key data to a plurality of physical locations, meanwhile, the key data is backed up and encrypted to form backup data, and thebackup data is physically isolated and stored; when the system detects an attack behavior, the completeness of the system is comprehensively detected, when the completeness detection of the system isnot passed, the physically isolated and stored backup data is decrypted and recovered, the decrypted and recovered backup data is used for reconstructing the system. According to the system and the method provided by the invention, the advantages of the attacker can be weakened by reconstructing the system when the system is subjected to the attack, and the condition that the system can operate normally and stably after being attacked is furthest ensured.
Owner:PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
Robust control method based on SSR-KDF for grid-connected inverter
ActiveCN104104251AReduce difficultyEasy to implementSingle network parallel feeding arrangementsDc-ac conversion without reversalPower qualityControl signal
The invention discloses a robust control method based on SSR-KDF for a grid-connected inverter. An output signal of a direct current bus voltage control ring, which is controlled by PI, serves as a reference value for output current of the grid-connected inverter, a tracking value of an actual value of the output current and a differential signal are extracted from an output end of the grid-connected inverter and serve as an input signal of a grid-connected inverter controller to be input into the gird-connected inverter controller, an indirect control signal of the grid-connected inverter is output and obtained after calculation, and the reference value for the output current of the inverter is subtracted from the indirect control signal of the grid-connected inverter to obtain actual control quantity of the inverter so as to control the grid-connected inverter. By the robust control method, running stability of a system is improved, halting failure caused by factors such as uncertainty on a system structure is avoided, grid-connected power quality is improved, and harmonic distortion of output electric energy of the grid-connected inverter is effectively reduced.
Owner:ZHEJIANG UNIV +1
Three-level DC converter apparatus and electric energy conversion method employing same
ActiveCN103825454ASimple structureImprove standardizationDc-dc conversionElectric variable regulationThree levelPhase shift control
The invention discloses a three-level DC converter apparatus and an electric energy conversion method employing the same. The three-level DC converter apparatus comprises n three-level DC conversion modules M1, M2..., Mi,..., and Mn. The n three-level DC conversion modules are connected with each other in parallel. Each module has the same circuit structure and parameters. The electric energy conversion method provided by the invention can perform phase shift control on switch tubes in the modules and among the modules. The three-level DC converter apparatus has the following advantages: the structure is simple, the expansibility is high, the redundancy capability is high, and a low-voltage single switch tube is applied to a high-voltage large-power electric energy conversion occasion; and the control method provided by the method can improve the equivalent switch frequency of the three-level DC converter apparatus to 2n times of an original switch frequency, substantially reduces the pulsation of input current and output voltage, and accordingly greatly reduces the volume, weight and cost of an input and output filter, and at the same time, the efficiency and dynamic performance of a circuit are also enhanced.
Owner:NO 719 RES INST CHINA SHIPBUILDING IND
High-redundancy locomotive network control system
ActiveCN109917778AIncrease redundancyReduce redundancyElectric testing/monitoringControl systemNetwork control
The invention relates to a locomotive network control system and in particular to a high-redundancy locomotive network control system to solve the poor reliable redundancy of an existing locomotive network control system. The high-redundancy locomotive network control system includes two VCUs and two or more RIOMs, wherein two VCUs are arranged on two back motherboards respectively; two power boards are integrated into each single back motherboard; and two power boards 1# and 2# are integrated into each RIOM. For the key digital quantity input signal of the locomotive, the key digital quantityinput signal of the locomotive and its redundant signal should be input into a digital quantity input board powered by the 1# power board and a digital quantity input board powered by the 2# power board of the RIOMs respectively. For the key output signal of the locomotive, the key output signal of the locomotive and its redundant command should be controlled by a digital quantity output board powered by the 1# power board and a digital quantity output board powered by the 2# power board.
Owner:CRRC YONGJI ELECTRIC CO LTD
Multi-transmission and multi-receiving large-power induction electric energy transmission system
InactiveCN108390469ADoes not affect normal workIncrease powerCircuit arrangementsModularityEngineering
The invention discloses a multi-transmission and multi-receiving large-power induction electric energy transmission system. The multi-transmission and multi-receiving large-power induction electric energy transmission system comprises more than two induction electric energy transmission units, wherein each induction electric energy transmission unit comprises a sending end and a receiving end, thesending end comprises an inverter and a sending coil, the receiving end comprises a receiving coil and a rectifier, DC input ends of the inverters of all induction electric energy transmission unitsare connected in parallel to a DC power supply, and DC output ends of the rectifiers are connected in parallel to a load. The multi-transmission and multi-receiving large-power induction electric energy transmission system has the beneficial effects that a multi-emission and multi-pickup scheme is employed, the transmission power of the system is greatly increased and can reach hundreds of kilowatts; by designing a plurality of pickup mechanisms, normal working of the other pickup structures are not affected when a certain pickup mechanism is failure and cannot work, and the system is high inintegral reliability and high in redundancy; and since different emission mechanisms have same structures and parameters, different pickup mechanisms also have same structures and parameters, modularmass production is facilitated, and the cost is reduced.
Owner:SOUTHWEST JIAOTONG UNIV
Fire hazard signal monitoring system based on zigbee and android
InactiveCN106652308AReal-time acquisitionReal-time monitoringFire alarm electric actuationFire alarm smoke/gas actuationVideo monitoringReal-time data
The invention discloses a fire hazard signal monitoring system based on zigbee and android; the system comprises data acquisition end zigbee design, PC end design, Web server end design, and Android client end design; main functions comprises two aspects; the system contains a wireless sensor network based on Zigbee; the sensor data can be remotely checked by an APP on a mobile phone; values of sensor groups of different nodes can be displayed in a curve and real time data mode; when the collected environment information exceeds a set threshold, a fire hazard early warning short message can be automatically sent; a video monitoring terminal is integrated with the web server, once connected with the internet, the monitoring videos can be viewed through the mobile phone APP; the APP can control a camera to rotate in certain scope, thus enlarging the monitoring scope. The fire hazard signal monitoring system only need one mobile phone APP so as to monitor indoor information at any place with access to the internet; the fire hazard signal monitoring system is stable and reliable in performance, easy to promote in usage, and can provide the effect of taking precautions against calamity on the fire hazards.
Owner:JILIN UNIV
Spaceborne distributed type synthetic aperture microwave radiometer system and design method
ActiveCN109239699AStrong redundancyReduce manufacturing difficultyRadio wave reradiation/reflectionMicrowave radiometerImage resolution
The invention provides a spaceborne distributed type synthetic aperture microwave radiometer system and a design method. The system is formed by a plurality of small synthetic aperture microwave radiometer systems arranged according to a certain distributed structure, the space resolution of the whole system is determined by a maximum physical dimension of a whole distributed arrangement antenna array, hardware structures of all the small synthetic aperture microwave radiometer systems are completely the same, each small synthetic aperture microwave radiometer system comprises an antenna array, a receiver channel array, a signal acquisition subsystem, a sub-band division subsystem, a related processing subsystem, a brightness temperature inversion subsystem, and an inter-satellite communication subsystem etc. The whole system adopts the distributed structure, the system is advantaged by maneuverability, flexibility, and high redundant fault capability; besides, the manufacturing difficulty of the system is reduced, batch production is facilitated, and the cost of the single system can be reduced.
Owner:XIAN INSTITUE OF SPACE RADIO TECH
Distributed power generation system architecture and control method thereof
InactiveCN109921455AImprove efficiencySimple structureAc-dc conversionDc-dc conversionPower inverterMode control
The invention provides a distributed power generation system architecture and a control method thereof and relates to the technical field of power electronics. A preceding stage of the distributed power generation system architecture adopts a bidirectional direct current converter, a backward stage adopts a boost type high-gain inverter, the bidirectional direct current converter and the boost type high-gain inverter are respectively connected on a low voltage direct current bus, and the distributed power generation system architecture has both the advantages of a series direct current modulararchitecture and the advantages of a parallel direct current modular architecture. Meanwhile, a voltage class of the direct current bus is lowered, security of a system is improved, and cost of the system is further reduced. Besides, the invention also provides a related control strategy of the distributed power generation system architecture, and by virtue of a way of controlling different loadsin different modes, a voltage value of the low voltage direct current bus of the system can be monitored in real time, so that the backward stage inverter can not be damaged due to overload operation, and reliability of the system is improved.
Owner:GPOWER SEMICON
Emergency communication system based on SKYWAN VSAT satellite communication network
InactiveCN111555792AEmergency response is fastIncrease flexibilityRadio transmissionEmergency/hazardous communication serviceNetwork ConvergenceCommunications system
The invention discloses an emergency communication system based on an SKYWAN VSAT satellite communication network. The emergency communication system comprises a communication satellite transponder and a ground station with satellite regulator equipment; according to the emergency communication system, a wide-area transmission bearing network is constructed through a plurality of fixed ground stations and portable stations, so that a transmission platform covering a far-end field area and a rear command center is formed, and the emergency communication system is provided with an IP interface and is fused with any network based on the IP technology. The emergency communication system utilizes the characteristic of large coverage area of a satellite communication network to transmit on-sitereal-time videos, voices and data back to the rear command center to construct a transmission network between the rear and the front, thereby realizing command and dispatch communication in an emergency environment. In daily working conditions, the satellite communication network is used as a backup transmission network, a second route, a bearing part of communication services and the like, so that the bandwidth capacity of the whole communication system is increased.
Owner:HUANENG GRP R&D CENT CO LTD
Museum cultural relic monitoring system based on ZigBee and Android
InactiveCN105739576AAchieve protectionRealize the protection functionSimultaneous control of multiple variablesMonitoring systemComputer terminal
The invention discloses a museum cultural relic monitoring system based on ZigBee and Android. The museum cultural relic monitoring system comprises a ZigBee terminal, a monitoring terminal and a ZigBee coordinator. The ZigBee terminal is used for collecting environment state information in cultural relic boxes and comprises a ZigBee wireless communication transmitting module. The ZigBee wireless communication transmitting module transmits the collected information to the ZigBee coordinator. The ZigBee coordinator is used for establishing and maintaining a wireless communication network and transmitting the received information to the Android monitoring terminal. The ZigBee coordinator comprises a ZigBee wireless communication receiving module which receives the information of the ZigBee wireless communication transmitting module. The system is simple in networking, convenient to maintain, high in network redundancy and robustness and great in human-computer interaction performance and can reasonably monitor the state of cultural relics in the cultural relic boxes in the museum. According to the museum cultural relic monitoring system based on ZigBee and Android, cultural relic protection and safety protection can be effectively realized and finally the expense of manpower protection cost can be reduced.
Owner:JIANGSU UNIV OF SCI & TECH
10Kv high-voltage electricity-saving controller
The invention discloses a 10Kv high-voltage electricity-saving controller, which comprises a control-box body, a main circuit, an input-end control circuit and an output-end control circuit, wherein the main circuit, the input-end control circuit and the output-end control circuit arranged in a control box in a matching mode. Through the 10Kv high-voltage electricity-saving controller disclosed by the invention, the defects of high cost, poor safety, poor reliability, weak redundancy capability and the like in the prior art can be overcome to realize the advantages of low cost, good safety, good reliability and strong redundancy capability.
Owner:XINJIANG HOPE ELECTRONICS
Automatic connection control device for backup power supply
PendingCN108471163AReduce the impactFast startupPower network operation systems integrationInformation technology support systemRemote controlControl circuit
The invention discloses an automatic connection control device for a backup power supply. The automatic connection control device comprises a control circuit module, and the control circuit module comprises an electric supply control circuit, a power generator set control circuit and a remote control circuit, wherein an electric supply is connected with electric equipment through the electric supply control circuit, a power generator set is connected with the electric equipment through the power generator set control circuit, and the remote control circuit is connected with the power generatorset. By means of the automatic connection control device for the backup power supply, the power generator set can be quickly started, and the automatic connection control device is safe, practical, efficient and reliable, and can be locally and remotely operated and controlled.
Owner:GUANGXI YUCHAI MASCH CO LTD
A robust control method for grid-connected inverter based on ssr-kdf
ActiveCN104104251BReduce difficultyEasy to implementSingle network parallel feeding arrangementsDc-ac conversion without reversalPower qualityControl signal
The invention discloses a robust control method based on SSR-KDF for a grid-connected inverter. An output signal of a direct current bus voltage control ring, which is controlled by PI, serves as a reference value for output current of the grid-connected inverter, a tracking value of an actual value of the output current and a differential signal are extracted from an output end of the grid-connected inverter and serve as an input signal of a grid-connected inverter controller to be input into the gird-connected inverter controller, an indirect control signal of the grid-connected inverter is output and obtained after calculation, and the reference value for the output current of the inverter is subtracted from the indirect control signal of the grid-connected inverter to obtain actual control quantity of the inverter so as to control the grid-connected inverter. By the robust control method, running stability of a system is improved, halting failure caused by factors such as uncertainty on a system structure is avoided, grid-connected power quality is improved, and harmonic distortion of output electric energy of the grid-connected inverter is effectively reduced.
Owner:ZHEJIANG UNIV +1
A high-efficiency multi-turn flat copper wire braided spiral wound motor stator
ActiveCN109391052BReduce wasteReduce solder connection positionsWindings insulation shape/form/constructionMagnetic circuit stationary partsCopper wireElectric machine
The invention discloses a high-efficiency multi-turn flat copper wire braided spiral winding motor stator comprises a stator body, a trough body, insulating paper and flat copper wires. The trough body is arranged on the stator body, the insulating paper is arranged between the inner wall of the trough body and the flat copper wires, the flat copper wire includes a first phase line group A, a second phase line group B and a third phase line group C, the first phase line group A, the second phase line group B and the third phase line group C are set in a braided spiral winding mode. Through theabove mode, the high-efficiency multi-turn flat copper wire braided spiral winding motor stator of the invention has the advantages of high slot full rate, short stator end and relatively copper wiresaving, the used flat copper wires are not entangled, the heat dissipation performance is good, the efficiency is high, and the fault tolerance and redundancy are high.
Owner:DEPOWER ENERGY TECH CO LTD
Movable multimedia fusion communication equipment based on network
ActiveCN106341741AStrong redundancyForcibly occupying an areaData switching current supplySelection arrangementsEngineeringNetwork integration
The invention discloses a movable multimedia fusion communication equipment based on the network and relates to the communication technology field. The equipment comprises a high-strength portable movable casing, and a ground signal access device, an underground signal access device, an underground signal monitoring device and an underground signal control device which are arranged in the high-strength portable movable casing, wherein the underground signal access device is connected with the ground signal access device, the underground signal monitoring device is connected with the ground signal access device and the underground signal access device, and the underground signal control device is connected with the ground signal access device, the underground signal access device and the underground signal monitoring device. The equipment is advantaged in that not only can the volume be small, the equipment can be further used in a mobile mode, but also the equipment further has properties of short construction period, high network integration level, small-quantity fault points, strong environment adaptation capability and strong fusion communication capability, can realize multistage expansion and can rapidly realize a multi-data-type fusion communication function.
Owner:JILIN ZHONGTIAN DIGITAL TECH
Ship motor brake control system
ActiveCN109889120AAchieve decelerationRealize functionElectronic commutation motor controlAC motor controlElectricityOvervoltage
The invention discloses a ship motor brake control system. According to the system, a spatial voltage vector is determined by calculating amplitude increment and phase increment of a stator flux linkage, and then an inverter of the motor is controlled by modulating the intermediate voltage through the spatial voltage vector, so that deceleration or parking of a ship electric driving system is achieved. According to the ship motor brake control system in the invention, not only can the production cost be saved, but also the motor frequency converter can be ensured not to generate overvoltage faults during normal operation.
Owner:CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
A mobile multimedia fusion communication device based on network
ActiveCN106341741BStrong redundancyForcibly occupying an areaData switching current supplySelection arrangementsNetwork integrationHigh intensity
Owner:JILIN ZHONGTIAN DIGITAL TECH
A commutation switch device and a dispatching application system adopting the commutation switch device
PendingCN108988363AStrong redundancyPolyphase network asymmetry elimination/reductionPolyphase network asymmetry reductionChipsetPower parameter
The invention relates to a commutating switch device. The device includes an auxiliary power, an execution module, a relay drive module, a voltage acquisition module, a current acquisition module, a state acquisition module and a main control chip set. According to voltage acquisition module and current acquisition module, main control chip set calculates power parameter values of each branch circuit under each feeder unit, and stores them in memory. When leakage current value exceeds leakage current standard value, main control chip set stops commutation. When the power parameter value otherthan the leakage current value is in the unbalanced adjustable range, the master control chip set outputs control commands to the relay driving module according to the commutation control sequence according to the state acquisition module. The commutation switch device has independent acquisition and commutation. In the structural scheme of unbalanced regulation of power line, the participation ofcommutation master controller is not required, the wiring is simple, and the maintenance is convenient. The commutation master controller can avoid the deterioration of the operation condition of power line caused by the failure of the commutation master controller when managing multiple commutation switch devices.
Owner:浙江百固电气科技股份有限公司
ZigBee intercom station network system and communication method thereof
InactiveCN103347311AEasy to set upEasy maintenanceNetwork topologiesCommunication interfaceElectricity
A ZigBee intercom station network system comprises a plurality of ZigBee intercom station devices which are arranged in a linear mode to form a linear topology ad hoc network. Each ZigBee intercom station device comprises a shell, a power panel and a ZigBee main board, each shell is provided with an outside electric interface, a communication interface and two antennas, the power panels and the ZigBee main boards are arranged inside the shells, the power panels are connected with the outside electric interfaces and the ZigBee main boards, and the ZigBee main boards are connected with the communication interfaces and are provided with two ZigBee receiving and sending modules which are respectively connected with one antenna. The ZigBee intercom station network system is easy to establish, convenient to maintain, strong in redundancy and robustness of the network, and high in bandwidth utilization rate due to the fact that bandwidth loss is distributed to the two ZigBee receiving and sending modules.
Owner:SHANGHAI SHANYUAN ELECTRONICS SCI & TECH CO LTD
An opening and closing control system and control method for a charging hatch cover of a new energy vehicle
ActiveCN110593678BImprove intelligenceImprove robustnessElectrical locking circuitsIndividual entry/exit registersComputer hardwareNew energy
Owner:深蓝汽车科技有限公司
Gear sensing device and using method thereof
The invention relates to a gear sensing device and a using method of the gear sensing device. The gear sensing device comprises a circuit board, a plurality of inductors are arranged on the circuit board, a metal plate is arranged above the inductors, a plurality of through holes are formed in the metal plate, the metal plate can move relative to the circuit board, the number of gears is set to beN, N is larger than or equal to 2, the number of the inductors is at least M, and 2<M-2><2<=2<M-1>, the number of the through holes is at least 2N-M, the metal plate is controlled to move relative tothe circuit board to enable the inductors to be exposed out of the through holes so as to obtain different binary codes, the inductors are arranged in sequence, the codes are set to be 0 when the inductors are exposed out of the through holes, the codes are set to be 1 when the inductors are shielded by the metal plate, and different binary codes are obtained when the metal plate is moved to different gears. By adopting the technical scheme, according to the gear sensing device and the using method of the gear sensing device, the structure is simple, precision is high, the redundant capacityis high, gears can still be recognized after some inductance signals lose efficacy, and stability is high.
Owner:WENZHOU CHANGJIANG AUTOMOBILE ELECTRONICS SYST
Short message transmission method and system
ActiveCN102364967BIncrease flexibilityStrong redundancyNetwork traffic/resource managementMessaging/mailboxes/announcementsInformation transmissionTransmission system
Owner:SHANGHAI CTRIP COMMERCE CO LTD
10Kv high-voltage electricity-saving controller
The invention discloses a 10Kv high-voltage electricity-saving controller, which comprises a control-box body, a main circuit, an input-end control circuit and an output-end control circuit, wherein the main circuit, the input-end control circuit and the output-end control circuit arranged in a control box in a matching mode. Through the 10Kv high-voltage electricity-saving controller disclosed by the invention, the defects of high cost, poor safety, poor reliability, weak redundancy capability and the like in the prior art can be overcome to realize the advantages of low cost, good safety, good reliability and strong redundancy capability.
Owner:XINJIANG HOPE ELECTRONICS
A three-level DC conversion device and an electric energy conversion method using the device
ActiveCN103825454BSimple structureImprove standardizationDc-dc conversionElectric variable regulationThree levelPhase shift control
The invention discloses a three-level DC converter apparatus and an electric energy conversion method employing the same. The three-level DC converter apparatus comprises n three-level DC conversion modules M1, M2..., Mi,..., and Mn. The n three-level DC conversion modules are connected with each other in parallel. Each module has the same circuit structure and parameters. The electric energy conversion method provided by the invention can perform phase shift control on switch tubes in the modules and among the modules. The three-level DC converter apparatus has the following advantages: the structure is simple, the expansibility is high, the redundancy capability is high, and a low-voltage single switch tube is applied to a high-voltage large-power electric energy conversion occasion; and the control method provided by the method can improve the equivalent switch frequency of the three-level DC converter apparatus to 2n times of an original switch frequency, substantially reduces the pulsation of input current and output voltage, and accordingly greatly reduces the volume, weight and cost of an input and output filter, and at the same time, the efficiency and dynamic performance of a circuit are also enhanced.
Owner:NO 719 RES INST CHINA SHIPBUILDING IND
A Spaceborne Distributed Synthetic Aperture Microwave Radiometer System and Design Method
ActiveCN109239699BStrong redundancyReduce manufacturing difficultyRadio wave reradiation/reflectionMicrowaveDistributed structure
Owner:XIAN INSTITUE OF SPACE RADIO TECH
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