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256results about How to "Simple and reliable design" patented technology
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Robotic storage buffer system for substrate carrier pods
InactiveUS7039499B1Expand capacityMinimal footprintProgramme-controlled manipulatorDigital data processing detailsCartActuator
A storage / buffering system for the stocking and / or buffering of substrate and / or substrate carriers in a process environment includes a 6-axis robot. An end-effector is connected with the robot providing an additional one degree of freedom and a mechanism for grabbing and moving of substrate and / or substrate carriers. The robot is mounted in an inverted orientation to a removable service cart for easy removal of the robot to a service area in the event of breakdown. The robot receives commands from a programmable controller connected to control the robot and configured to direct the arm of the robot through a set of movements. Product is loaded in and out of the system through I / O load ports. Product is stored inside the storage / buffering system on a plurality of storage locations, each with product presence / absence detect sensor. The robot can alternatively be mounted directly to the storage system enclosure structure.
Owner:SEMINET
Apparatus able to track sunlight by three angles for photovoltaic power generation
InactiveUS20070277868A1Improve power generation efficiencySimple and reliable designPhotovoltaic supportsSolar heating energyEngineeringDrive motor
Apparatus able to track sunlight by three angles for photovoltaic (PV) power generation includes: a solar cell module; a solar cell holder; an angle-adjustable platform; a driving motor; a holding pillar and a tracking sensor. The apparatus for PV power generation can generate electric power at three specific angles in a day. The tracking sensor can track the position change of the sun by utilizing the driving mechanism to switch among different positioning statuses. Through the optimized design and the cooperation of the tracking sensor and the positioning mechanism, the apparatus for PV power generation of the present invention can achieve a highest efficiency elevation of the electric power generation by minimum tracking motions.
Owner:RADISTAR CORP
Frequency conversion power source based on digital signal processor controlling
InactiveCN101295933AComplete protection functionsReduce design difficultyAC motor controlConversion with intermediate conversion to dcDigital signal processingSwitching frequency
The invention relates to a variable-frequency power source based on the control of a digital signal processor, which comprises a switch power source module, a control circuit, a circuit for isolating and shaping pulse-width modulating signal, IPM inverting circuits, a circuit for detecting and protecting busbar voltage, a rectification input slow-start circuit, a communication circuit, an interface circuit for isolating and inputting parallel signals and an human-computer interface circuit for displaying the key. The invention adopts the structure of a single digital signal processor (DSP) coupled with the double IPM inverting circuits, provides two paths of independent variable-frequency power sources for two sets of asynchronous motors at the same time and carries out independent speed regulations to the two sets of asynchronous motors. The variable-frequency power source of the invention has the advantages of small volume, low power consumption, high reliability and being convenient for bulk production, etc., and adopts an appropriate switch frequency and an advanced voltage space vector pulse width modulation algorithm (SVPWM), thereby lowering the noise during the operation of the asynchronous motors and increasing the voltage utilization rate, with obvious effect on energy saving.
Owner:INST OF AUTOMATION CHINESE ACAD OF SCI
Novel drilling method for shaft drilling machine
ActiveCN103899316AImprove stabilityImprove construction efficiencyDerricks/mastsBorehole drivesSlagWell drilling
Owner:CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
Pivot spring automatic door sealing apparatus
InactiveUS6195939B1Minimize sliding and abrading contactReduce manufacturing costSealing arrangementsEngineeringLeaf spring
A sealing apparatus for use with a door which swings over a threshold and has a door lower end, a door face and a door frame, for closing the gap between the door lower end and the threshold, includes a mechanism mounting member; a substantially horizontal gate member for closing the gap; a slide bar positioned above and substantially parallel with the gate member, the slide bar having a protruding end extending laterally from the door toward the door frame to abut the door frame as the door is closed; structure for guiding the slide bar to move laterally relative to the door and to the mounting member; a leaf spring having a leaf spring first end and a leaf spring second end and a leaf spring central segment, the leaf spring first end being engagingly fitted to the slide bar and the leaf spring second end being engagingly fitted to the gate member, where the leaf spring central segment is resiliently pivotable upwardly and laterally to vertically displace the gate member relative to the slide bar; structure for guiding the gate member to move up and down relative to the door; so that closing the door causes the door frame to depress the slide bar protruding end, thereby sliding the slide bar horizontally in one lateral direction and causing the leaf spring to pivot to an increasingly vertical orientation and to thereby lower the attached gate member to make sealing contact with the threshold.
Owner:SOWERS DAVID A
Ignition system
InactiveUS9399979B2Simple and reliable designMachines/enginesInstallations with induction energy storagePower flowTransformer
An ignition system for an internal combustion engine includes an ignition transformer with two primary windings. The ignition system is designed to generate, for a given ignition event, a unipolar current through the secondary winding by way of a control circuit that is configured to first energize and deenergize the first primary winding to establish a first electrical arc across the spark-plug electrodes and, when the current in the secondary winding reaches, or drops below, a current threshold, repeatedly energizes and deenergizes the second primary winding to establish a plurality of second current pulses across the electrodes in order to maintain the burn phase.
Owner:DELPHI INT OPERATIONS LUXEMBOURG S A R L +1
Method of monitoring rusting risk of reinforcement in concrete in situ
InactiveCN104729982ASimple and reliable designImprove monitoring efficiencyWeather/light/corrosion resistanceStress concentrationPre stress
The invention relates to a method of monitoring rusting risk of reinforcement in concrete in situ. The method includes the steps of 1, according to the principle of plane state of stress and stress concentration, applying prestress to rusting monitoring sensing units to enable them to be in a plane state of stress; 2, packaging three sides of each rusting monitoring sensing unit, and reserving one side as a rusting monitoring side; 3, distributing the rusting monitoring sensing units at equal intervals within a rectangular steel frame, before concreting, distributing the rectangular steel frame and the outer surface of concrete at a certain angle in an area to be subjected to reinforcement rusting monitoring, allowing the rusting monitoring sides to face a protective layer, and performing rusting monitoring through continuous strain measurement of different sectional heights of sheets. The method has the advantages that monitoring chloride threshold concentration fronts at different depths is achieved, initial rusting time of the reinforcement is predicted, results are updated according to monitoring data, the rusting monitoring sensing units as deep as the reinforcement allow the final initial rusting time, rusting rate and rusting degree of the reinforcement to be directly monitored.
Owner:UNIV OF SCI & TECH BEIJING +1
Device for regulating the flow rate of air feeding a turbine ventilation cavity of a turbomachine turbine section
ActiveUS20100119356A1Easy to take offReduce fuel consumptionWind motor controlEngine fuctionsInternal pressurePressure difference
The invention relates to a device for regulating the flow rate of air feeding a turbine ventilation cavity of a turbomachine turbine section, the device comprising at least one tubular duct opening into a take-off cavity and leading into a turbine ventilation cavity, the pressure inside the take-off cavity being higher than the pressure inside the turbine ventilation cavity, an air flow rate regulation valve disposed in the tubular duct, the valve being suitable for moving under the effect of the pressure difference between the take-off cavity and the turbine ventilation cavity, and mechanical return means for holding the valve in a maximum closure position for the duct so long as the pressure difference between the take-off cavity and the turbine ventilation cavity remains below a predetermined threshold pressure.
Owner:SN DETUDE & DE CONSTR DE MOTEURS DAVIATION S N E C M A
Control circuit for a direct current motor
InactiveUS6963183B1Reduce power lossReduce power consumptionBatteries circuit arrangementsAsynchronous induction motorsEngineeringControl circuit
The invention relates to a control circuit for a direct current motor with a reverse pole protection device, which is connected to the electric circuit of the electrolytic capacitor and the free-wheeling diode in order to reduce losses in the reverse pole protection device.
Owner:ROBERT BOSCH GMBH
Overvoltage protection device with simplified display system and corresponding production method
ActiveUS7738231B2Simple and reliable designCircuit-breaking switches for excess currentsSwitch operated by excess voltageOvervoltageEngineering
A device (1) for protecting an electrical installation from overvoltages, having at least one protection component (2) and disconnection means (3) capable of changing from a closed configuration to an open configuration, as well as signaling means (5) capable of indicating the configuration of the disconnection means (3). The disconnection means (3) and the signaling means (5) respectively comprise a mobile disconnection element (4) and a mobile signaling element (12) arranged such that, when going from the closed configuration to the open configuration, the mobile disconnection element (4) moves in a rotational movement according to a first trajectory and cooperates with the mobile signaling element (12) to drive the mobile signaling element in rotation along a second trajectory different from the first trajectory.
Owner:ABB FRANCE SAS
Ignition system
InactiveUS20150034059A1Simple and reliable designMachines/enginesInstallations with induction energy storageTransformerCurrent threshold
An ignition system for an internal combustion engine includes an ignition transformer with two primary windings. The ignition system is designed to generate, for a given ignition event, a unipolar current through the secondary winding by way of a control circuit that is configured to first energize and deenergize the first primary winding to establish a first electrical arc across the spark-plug electrodes and, when the current in the secondary winding reaches, or drops below, a current threshold, repeatedly energizes and deenergizes the second primary winding to establish a plurality of second current pulses across the electrodes in order to maintain the burn phase.
Owner:DELPHI INT OPERATIONS LUXEMBOURG S A R L +1
Coordinated control device and method for MMC (modular multilevel converter) type unified power quality conditioner
InactiveCN103427425AGuaranteed uptimeSimple and reliable designReactive power adjustment/elimination/compensationAc network voltage adjustmentDevice parametersLoad capacity
The invention belongs to the technical field of medium-voltage flexible alternating current power transmission and distribution and power electronic control of power systems, and particularly relates to a coordinated control device and method for an MMC (modular multilevel converter) type unified power quality conditioner. The coordinated control device comprises the MMC type unified power quality conditioner and a coordinated controller thereof, common direct current is allowed to run in a voltage reducing manner by limiting active current component maintaining common direct current voltage stable in three-phase current of an outlet of an MMC on a parallel side, the current of a secondary side of a series coupling transformer and system current are limited within the safety running range of the conditioner, and voltage sag amplitude which can be compensated by the conditioner is improved. According to the coordinated control method, the UPQC (unified power quality conditioner) can fully function in comprehensive treatment process, and reliable running of the MMC on the series side of the UPQC is ensured to a large extent. The coordinated control method is simple and reliable in design, applicable to UPQCs with different device parameters and adaptable to change of load capacity.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Dispensing valve and a container for holding fluid provided with such a dispensing valve
InactiveUS20080264979A1Simple and reliable designEasy and economical productionClosuresCheck valvesFixed positionHinge angle
The invention relates to a dispensing valve (2) for dispensing fluid from a container, comprising a central member (20) provided with a flexible membrane (22) having at least one slit (23), a flange (40) surrounding the central member for attaching the valve to the container and connecting means for connecting the central member to the flange, which connecting means comprise a material hinge (25). The valve is deformable from a closed position to a dispensing position upon application of pressure to the fluid in the container. The central member is further provided with a support (26) for the flexible membrane, which support is more rigid than the flexible membrane and extends towards the container in the secured position of the dispensing valve, wherein the material hinge directly couples the support to the flange.
Owner:AVESTO TECH
Container with heating/cooling assembly and removable power source modules
ActiveUS20180333007A1Simple and reliable designEfficient heatingDomestic cooling apparatusLighting and heating apparatusTemperature controlEngineering
The embodiments disclose an attachable battery base module configured for powering at least one attachable application module coupled to the attachable battery base module, wherein the attachable battery base is configured for powering the at least one attachable application module, a heating module attachment with a temperature control module coupled to the attachable battery base module configured for heating and / or boiling a liquid, a cooling module attachment with the temperature control module coupled to the attachable battery base module configured for cooling a liquid and wherein the temperature control module includes a temperature maintenance mode, wherein the temperature maintenance mode is configured for maintaining a preset, predefined or user preselected desired temperature when the desired temperature is reached.
Owner:GANAHL JOSEPH
Current-sharing control method and system for parallel modular inverse power supply
InactiveCN1808829ASimple and reliable designSimple and reliable implementationSingle network parallel feeding arrangementsDc-ac conversion without reversalControl systemSystem stability
This invention discloses one parallel module inverter power even current control method and system, wherein, the method comprises the following steps: comparing two inverter modules output values and taking maximum value as even current signal through even bus into other inverter module to control other inverter output value; the control system testing each inverter module DC / DC voltage control circuit output signals through CPU process through connection control bus feedback signals to each inverter module DC / AC to control each inverter module output. The relative system comprises at least two parallel load inverter module, one control system to control sine and cosine modulation signal generator through control bus to output the modulation signal to inverter module to adjust inverter module output.
Owner:GUANGXI NEW FUTURE INFORMATION IND
Intelligent home furnishing system
InactiveCN102088382ASimple and reliable designImprove performanceData switching by path configurationSystems designEngineering
The invention relates to an intelligent home furnishing system which comprises an intelligent home furnishing host which comprises an AV (audio-visual) array, a control module and an intelligent gateway; a plurality of regional terminal modules connected by a five unshielded twisted pair (UTP) and the intelligent home furnishing host; a plurality of control modules with different buses and connected to the terminal modules and various controlled equipment connected to the control modules; and a plurality of DVD (digital versatile disc), set-top boxes, cameras, MP3 or other audio / video equipment connected to the intelligent home host. After being subject to AV array switch and signal modulation, the audio / video signals of the audio / video equipment are transmitted by the five UTP. In the invention, an integrated design of four functions comprising integrated intelligent control, audio-video sharing, background music and security monitoring is used, so the system has the advantages of simple and reliable design, good performance and strong compatibility.
Owner:廖锦新
Method And Device For Avoiding Forgetting Children In Vehicle
InactiveCN102398547AEasy to installGuaranteed to workSignalling/lighting devicesAlarmsIn vehicleEngineering
The invention provides a method and a device for avoiding forgetting children in a vehicle. The method is characterized in that: a detector is utilized for detecting the vehicle-starting signals and the trip-finishing signals; and combined with the judgment of a driver, the information on the existence of a child will be transmitted to a central processing unit (CPU) for treatment. If there is a child in the vehicle, the CPU will send an instruction for movement to the preventing device, thereby adopting actions to avoid forgetting the child in the vehicle. The device of the utility model comprises a power supply, a vehicle starting test apparatus, an inquiry unit, a trip-over test device, a preventing device, and a central processing unit (CPU). The device helps avoid forgetting children in the vehicle.
Owner:钱自德 +3
Voltage judging device for electric automobile charging control guidance system and control method thereof
InactiveCN103337880AEffective isolationSimple and reliable designBatteries circuit arrangementsElectric powerGuidance systemCharge control
The invention relates to a voltage judging device for an electrical automobile charging control guidance system. The voltage judging device is composed of a main control unit, a threshold value generating module, a voltage comparison module, a voltage conversion module and an Ethernet interface module, wherein the main control unit is in one-way connection with the voltage conversion module and in two-way connection with the Ethernet interface module, the threshold value generating module is in one-way connection with the voltage comparison module, and the voltage comparison module is in one-way connection with the voltage conversion module. The main control unit is in two-way connection with a charging control guidance module, and the charging control guidance module is in one-way connection with the voltage comparison module and an electric automobile charger. The voltage judging device provided by the invention has such two charging modes that a background monitoring system regulates the output power of a vehicle-mounted charger and the background monitoring system does not regulate the output power of the vehicle-mounted charger, provides a reliable and practical voltage judging device for judging the charging connection state of the electric automobile, and prevents misplug of a charging interface of the electric automobile.
Owner:ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
Overvoltage protection device with simplified display system and corresponding production method
ActiveUS20070217106A1Simple and reliable designCircuit-breaking switches for excess currentsSwitch operated by excess voltageOvervoltageSignal element
A device (1) for protecting an electrical installation from overvoltages, having at least one protection component (2) and disconnection means (3) capable of changing from a closed configuration to an open configuration, as well as signalling means (5) capable of indicating the configuration of the disconnection means (3). The disconnection means (3) and the signalling means (5) respectively comprise a mobile disconnection element (4) and a mobile signalling element (12) arranged such that, when going from the closed configuration to the open configuration, the mobile disconnection element (4) moves in a rotational movement according to a first trajectory and cooperates with the mobile signalling element (12) to drive the mobile signalling element in rotation along a second trajectory different from the first trajectory.
Owner:ABB FRANCE SAS
Locking device with a blocking element
ActiveCN101387169AImprove securitySimple and reliable designBuilding locksAnti-theft devicesMechanical engineering
Owner:HUF HULSBECK & FURST GMBH & CO KG +1
Power feeding equipment in high voltage / supervltage transmission system
InactiveCN101093943AImprove anti-electromagnetic interference performanceSimple and reliable designElectrical storage systemBatteries circuit arrangementsHigh voltage igbtUltra high voltage
The power feeding equipment (PFE) includes a laser energy delivering power supply (LEDPS), a CT energy taking power supply (ETPS) connected to LEDPS in parallel, and a unit for monitoring and controlling working conditions of parallel circuit between LEDPS and ETPS. The function for monitoring and controlling the parallel circuit realizes automatic switching between LEDPS and ETPS based on actual working conditions. Being independent on working conditions of circuitry of high voltage / super voltage transmission, PFE can supply power for high voltage / super voltage transmission continuously. PFE also includes an energy storage unit in use for making smoothly and seamlessly switching between LEDPS and ETPS for load. Features of PFE are: long continuous service life, and lower cost.
Owner:CHINA ELECTRIC POWER RES INST
Ultra wide band rejection filter based on loading of multiple step impedance resonators
ActiveCN104091982AExpand stopband bandwidthReliable designWaveguide type devicesResonatorHigh impedance
The invention discloses an ultra wide band rejection filter based on loading of multiple step impedance resonators. The ultra wide band rejection filter comprises a double-faced copper-clad microstrip board. One end of a uniformity impedance resonator is connected with one end of an input end feeder line and one end of a first high impedance connecting line respectively, and the other end of the uniformity impedance resonator is open. The thin end of a microstrip line of the first step impedance resonator is connected with the other end of the first high impedance connecting line and one end of a second high impedance connecting line respectively, and the wide end of the microstrip line is open. The thin end of a microstrip line of the second step impedance resonator is connected with the other end of the second high impedance connecting line and an output end feeder line, and the wide end of the microstrip line is open. According to the ultra wide band rejection filter based on loading of the multiple step impedance resonators, the characteristic impedance of the uniformity impedance resonator and the two step impedance resonators is adjusted, so that the stop band range of the band rejection filter is greatly expanded.
Owner:SOUTH CHINA UNIV OF TECH
Automatic photoelectric separator for female and male silkworm eggs
ActiveCN102145335AAccurate separationOvercoming physiological characteristicsSortingTime scheduleAutomatic control
Aiming at the problems that time and labor are wasted when female and male silkworm eggs with different egg colors are separated and the requirement of production of silkworm seeds on time schedule is difficult to meet, the invention provides an instrument for automatically and accurately separating female and male silkworm eggs at a high speed, and the instrument is labor-saving and ensures thatthe silkworm eggs are not damaged. The separator for female and male silkworm eggs, provided by the invention, takes the characteristic that different sexual silkworm eggs have different egg colors as a design characteristic for recognizing and distinguishing the female and male silkworm eggs and focuses on overcoming the physiological property of the silkworm eggs that the silkworm eggs is not favorable for mechanical and automatic control. Through applying technologies such as turnplate type obliquely scraping egg transportation, and the like and using devices such as a single-channel prearranged counting and number control egg supply device, a multi-channel coil shunting and spaced radiation state sorting device, a respectively independent color sensor photoelectric recognition and electromagnetic egg pocketing device separation device, an obliquely scrapping, egg collecting and separately storing device and the like, high-speed and precise female and male silkworm egg separation is realized, the purposes of not damaging the silkworm eggs and maintaining the activity of the silkworm eggs are achieved, and labor is also greatly reduced.
Owner:ANHUI ZHONGKE OPTIC ELECTRONICS COLOR SORTER MACHINERY
Electric cooker and automatic reminding control method thereof
ActiveCN106308447AIngenious design ideasReliable designProgramme controlComputer controlDesign thinkingCooker
The invention relates to an electric cooker and an automatic reminding control method thereof. The electric cooker comprises a cooker body, a cooker cover and a tank, and further comprises a weighing device, an uncovering state detecting device, a temperature detecting device and an operating panel which are electrically connected to a single chip microcomputer, wherein the single chip microcomputer is additionally electrically connected to a reminding device. The electric cooker, when used, can conduct automatic reminding control firstly and sequentially judge whether food materials are added by a user or not, the covering / uncovering state of the electric cooker, the temperature state of the food materials and a user operating state so as to determine the situation of the food materials cooked in the electric cooker, then the use state of the electric cooker can be determined once again by the user and reminding information can be also transmitted so as to remind the user to start the electric cooker when the use state conforms to requirements. According to the technical scheme, the electric cooker disclosed by the invention is delicate in design thinking and is simple and reliable in design scheme.
Owner:FOSHAN SHUNDE MIDEA ELECTRICAL HEATING APPLIANCES MFG CO LTD +1
Hydraulic support remote control system based on EtherCAT
InactiveCN104196553AReduce complexityImprove developmentMine roof supportsControl layerSolenoid valve
The invention discloses a hydraulic support remote control system based on EtherCAT. The hydraulic support remote control system based on EtherCAT comprises a physical layer, a dielectric layer and a system control layer. The physical layer comprises a coal cutter, hydraulic supports and a scraper conveyer, wherein the coal cutter, the hydraulic supports and the scraper conveyer are arranged on a working fully mechanized face. The hydraulic supports are provided with a plurality of hydraulic cylinders and sensors. The dielectric layer comprises a plurality of solenoid valve sets, data collectors and operating panels. Each solenoid valve set, each data collector and each operating panel correspond to one hydraulic support in the physical layer. The system control layer comprises two master controllers, a plurality of I / O controllers and an EtherCAT bus used for transmitting very long instruction control words of the hydraulic supports, and the two master controllers and the I / O controllers are connected through the EtherCAT bus. The hydraulic support remote control system based on EtherCAT ensures real-time performance of remote control, provides big data transmission, and is low in development difficulty and high in reliability.
Owner:CHINA UNIV OF MINING & TECH
Using hydrostatic bearings for downhole applications
InactiveUS7942213B2Improve toleranceReduce wearDrilling rodsConstructionsEngineeringMechanical engineering
Hydrostatic bearings are used for drill string stabilization and bottom hole assembly steering. The hydrostatic bearings utilize an existing mud flow as the bearing fluid. For steering, the bearings may be used between movable kick pads and the formation to reduce friction. Alternatively, differential hydrostatic bearing pressure may be utilized to steer. Multi-modal (non-linear and linear) steering may be provided by selectively applying equal and unequal hydrostatic bearing pressures. The bearings can be made more tolerant of imperfections in the formation by utilizing multiple pressure pockets.
Owner:SCHLUMBERGER TECH CORP
Low-cost primary/standby hot switching system and method based on gateway
ActiveCN107769984AEasy to implementHigh degree of modularityData switching networksEmbedded systemVirtualization
The invention provides a low-cost primary / standby hot switching system and method based on gateway. The method comprises the following steps: the first switch equipment and the second switch equipmenthave the same configuration and running state, and communicate with the VRRP equipment through a virtual network interface; the VRRP equipment communicates with the external system equipment throughan external access interface; in the initialization, the roles of the first switch equipment and the second switch equipment are set as the standby equipment, when a voice signaling message from the external system equipment is received through the VRRP equipment, the switch equipment sets its own as the primary equipment; when a synchronization message from the external system equipment is received through the VRRP equipment, the switch equipment sets its own as the standby equipment; the VRRP equipment performs the primary / standby hot switching control of a network layer to realize the virtualization of the network layer, thereby enabling the primary equipment and the standby equipment to only present the virtual network interface for the external. The low-cost primary / standby hot switching system provided by the invention avoids the complex modification at the core network side, realizes the low cost of the design and the realization of the primary / standby hot switching scheme.
Owner:SUN KAISENS BEIJING TECH
Internet of Things security authentication method, system and terminal based on national cryptographic algorithm
ActiveCN110572828ASolve the key performance bottleneck of slow encryption and decryptionEnsure safetySecurity arrangementThe InternetSecurity authentication
The invention discloses an Internet of Things security authentication method, system and terminal based on a national cryptographic algorithm. The method comprises the steps of collecting basic information of an Internet of Things terminal; encrypting the acquired basic information of the Internet of Things terminal to obtain terminal identification information; sending the terminal identificationinformation and the session key request to a server, wherein the terminal identification information is used for verifying the validity of the Internet of Things terminal by the server; an overtime judgment step: judging whether a set time period is exceeded or not, and if so, returning to the terminal identification information preparation step, and if not, continuing to judge whether a sessionkey response message fed back by the server is received or not; if a session key response message fed back by the server is received, decrypting the session key response message and recovering the session key; entering the next step; if not, returning to the overtime judgment step; and encrypting to-be-transmitted data of the Internet of Things terminal by adopting the session key, and transmitting the encrypted data to the server.
Owner:SHANDONG COMP SCI CENTNAT SUPERCOMP CENT IN JINAN
Overvoltage protection device provided with arc cutting means and corresponding method
InactiveCN1879182ASimple designImproved disconnect capabilitySpark gap detailsSwitch operated by excess voltageElectric arcEngineering
The invention relates to a device (1) for protecting an electric installation against overvoltage comprising at least one protection component (10) provided with means for connecting to said electric installation, means for disconnecting the protection component (10) therefrom which are movable from a closed position to an open position, thereby forming an interstitial space (11) between the disconnecting and connecting means in such a way that an electric arc is formed therein. The inventive device is characterised in that it is provided with means (50) which approaches said electric arc from at least two different directions in order to reduce the cross-section thereof. Said invention is used for protecting against overvoltage.
Owner:SOULE PROT SURTENSIONS
Transformer station overhaul trolley
ActiveCN105226544AImprove versatilitySolve the problem of weak connectionLifting framesSwitchgearTransformerEngineering
The invention discloses a transformer station overhaul trolley comprising a work platform, a crank, a first connecting rod, a first gear, a second gear, a third gear, a second connecting rod, a third connecting rod, a fourth gear, a fifth gear, a sixth gear, a fourth connecting rod, a fifth connecting rod, a left track part, and a right track part. A height adjusting part is disposed under the work platform. The transformer station overhaul trolley is reasonably in structure and reliable to use, and may satisfy different switchgear requirements.
Owner:STATE GRID JIANGSU ELECTRIC POWER CO ZHENJIANG POWER SUPPLY CO +1
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