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414results about How to "Reduce the possibility of failure" patented technology
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Torsional impact drilling tool
ActiveCN101463709AReduce stick-slipReduce the possibility of failureVibration drillingRate of penetrationDrive shaft
The invention relates to a torsional impact drilling tool used for applying low amplitude high frequency torsional impact to a drill bit during a drilling process, which can increase the drilling efficiency and the service life of the drill bit and lesson the tripping operation and the drilling cost. The technical scheme of the torsional impact drilling tool is as follows: a housing is connected with a short section of a drilling column led into the drill bit by a spline, and is positioned by a shaft shoulder; a screw motor rotor and a screw motor stator form a screw motor, the screw motor rotor is eccentrically connected to a transmission shaft by a universal shaft and two bearings, and four diversion holes are arranged on the transmission shaft; the lower end of the transmission shaft is connected with a carrier with a cavity; a sliding impactor is arranged in the cavity and is fixed by pins, and an impact hammer is arranged in the sliding impactor; a falling prevention ring is connected with the housing by screw threads; and the damping shaft shoulder on the short section of the drilling column led into the drill bit is matched with the impact hammer of the sliding impactor to form a ratchet wheel structure. The torsional impact drilling tool has simple structure, and can be used in hard strata of a deep well; and as being short, the tool is also applicable to the deflecting operation and can be used in crooked well holes, thereby reducing the phenomenon of stick-slip of the drill bit and improving the rate of penetration.
Owner:SOUTHWEST PETROLEUM UNIV
Amorphous alloy roll-core and its production method
ActiveCN101150006AReduce turn lengthSave copperTransformers/inductances magnetic coresInductances/transformers/magnets manufactureButt jointTransformer
This invention relates to a non-crystal alloy rolled iron-core and its manufacturing method, in which, the iron-core is formed by several single frames winded in different sections and the section shape of the butt-joint iron-core is in a pre-designed Quasi-circular, quasi-polygon or a complex shape made of non-crystal alloy material or non-crystal alloy and silicon steel ribbon, in which, the one with the largest section is taken as the master frame rolled continuously with the straight non-crystal alloy ribbon and other single frames are formed by rolling different shapes of silicon steel ribbons, besides, the butt-joint core can be either close one or an open one, can be either single phase iron-core, three phase three posts planar core or a three phase five posts planar core or a three phase solid core.
Owner:NEWONDER SPECIAL ELECTRIC
Online monitoring and condition maintenance management system
InactiveCN102436226AImprove power supply reliabilityImprove economyTotal factory controlProgramme total factory controlData centerElectric power system
The invention relates to an online monitoring and condition maintenance management system, which is a layered and distributed data management and computer system, faces to a plurality of substation high-voltage equipment and adopts a multi-server level-to-level management system. The online monitoring and condition maintenance management system comprises an online monitoring equipment layer, a substation data network layer and a remote data center. By constructing and applying the management system, the online monitoring system is promoted to be transitioned to an all-round, networked, intelligent and comprehensive condition monitoring, diagnosis and service management system from the traditional isolated and static experimental system. The system provides a powerful technical supporting platform for overcoming periodic maintenance blindness, reducing maintenance times, reducing maintenance expenses, delaying maintenance cycle to the utmost extent, truly realizing condition maintenance for power system operation and management departments and further improving the operation rate of the equipment and the safety of power grids.
Owner:文存润 +1
Engine exhaust gas waste heat recovery and control system and method based on organic rankine cycle
InactiveCN102410054ADoes not affect work performanceReasonable workLiquid coolingPressure lubrication with lubrication pumpOrganic Rankine cycleControl system
The invention discloses an engine exhaust gas waste heat recovery and control system and method based on organic rankine cycle, and belongs to the field of energy conservation and emission reduction. In the invention, a waste heat recovery system comprises engine cycle, organic rankine cycle, cooling water cycle and lubrication oil cycle which are coupled together; by means of reasonable control, the system can be convenient to start, stable to operate and rapid to stop according to the operation of the engine under different working conditions; in case of a system failure, the system can be emergently braked; and under the condition of no influence on the normal operation of the engine, the optimal performances of the system can be obtained finally, and the utilization ratio of the engine exhaust gas waste heat is improved greatly, thus thermal pollution of the engine exhaust gas to the environment is improved.
Owner:BEIJING UNIV OF TECH
Method for identifying sound fault based on mel energy spectrum and convolution neural network
ActiveCN109599126ASave time at workSave human effortSpeech analysisTime domainFast Fourier transform
The invention discloses a method for identifying a sound fault based on a mel energy spectrum and a convolution neural network. The method comprises the following steps: first, performing pre-emphasison initially input audio data; then, performing framing and windowing processing on the data; after that, performing fast Fourier transform on framed and windowed data; extracting energy features ona frequency domain, processing an energy spectrum by using a set of mel-scale triangular filter banks; and after that, converting the data into a Mel energy spectrum by using energy in different frequency domains corresponding to each frame as a Y axis, and different frames in a time domain as an X axis. After that, the energy spectrum needs to be further framed to adapt to an input of a CNN (convolution neural network). Each frame is a sample, and one-hot coding of a label corresponding to each sample is used as an output of the CNN to train a CNN model until a network training error reachesthe minimum. During prediction, a probability value of each type of label is output, and a label with the largest probability value is taken as a final discrimination result.
Owner:广州丰石科技有限公司
Semi-automatic mortising machine
InactiveUS20050022899A1Easy constructionReduce the possibility of failureTongue/grooves making apparatusMulti-purpose machinesMortise and tenonMortising machine
A semi-automatic mortising machine includes a support base, a support bar, a guide device, a working device, a distance adjusting device, and a dust collection box. Thus, the displacement direction can be controlled in a manual manner during the working process, and the cutting operation is performed in an automatic manner, so as to cut the mortises and tenons in the workpiece.
Owner:CHANG CHI LO
Intelligent self-diagnosis medium-pressure vacuum circuit breaker
ActiveCN101515520AExtended service lifeGuaranteed stabilityThermometers using electric/magnetic elementsUsing electrical meansElectric power systemComputer module
The invention relates to an intelligent self-diagnosis medium-pressure vacuum circuit breaker, which is characterized in that a left rib plate in the framework of the breaker is provided with a real time supervision and diagnosis system circuit, a separating brake loop, a tank circuit and a closing circuit are internally sheathed with hall sensors, an operational power supply is connected with two divider resistance in parallel, a first camera and a second camera are arranged above a second compartment and a fourth compartment of the breaker, an operating mechanism is provided with a displacement pickup, a touch arm is posted with the temperature pickup, the hall sensor, the divider resistance and the two cameras, the output end of the displacement pickup is electrically connected with the real time supervision and diagnosis system circuit by respective interface circuits, the output end of the temperature pickup is connected with the input end of a signal acquisition module, the output end of the signal acquisition module is connected with the input end of the real time diagnosis and supervision system circuit by a pair of wireless transceiving module. The breaker has the advantages of fault self-diagnostic function, reliably avoiding the occurrence of accidents and the worsening of problems and guaranteeing the stability of a power system.
Owner:上海南华兰陵电气有限公司 +1
Valve, especially proportional pressure control valve
InactiveCN101124525AReliable valve switching functionReliable switching functionServomotor componentsEqualizing valvesEngineeringPressure controlled ventilation
A proportional pressure control valve includes a valve housing (38) with at least three fluid connections (1, 2, 3). The valve can be connected to a hydraulic drive system with a pre-determinable consumer pressure. The valve can perform reliable valve switching functions even for low-viscous fluid media, and can reduce its susceptibility to disturbance variables. A valve piston (56) actively connected to a pilot seat (5) by an energy accumulator (62) can be controlled by a control device (40). The consumer pressure on a fluid connection (1) acts on the valve piston (56) such that, according to the consumer pressure and the actuating force of the control device (40), a fluid can flow between the two other fluid connections (2 and 3) in both directions inside the valve housing (38).
Owner:HYDAC FLUITECHNIK GMBH
Image forming apparatus transferring log information
InactiveUS20060085697A1Small sizeReduce the possibility of failureError detection/correctionElectrographic process apparatusLog managementImage formation
An image forming apparatus for performing a process relating to forming of an image includes a log management unit to manage generated log information, and a log transfer unit to transfer log information of a type specified in log transfer information among the log information managed by the log management unit to a transfer destination specified in the log transfer information.
Owner:RICOH KK
Dynamic real-time monitoring method for concrete bridge prestressed tendon tensioning force and special prestress construction system
ActiveCN105603876AWork lessEnsure construction safetyBridge erection/assemblyApparatus for force/torque/work measurementHuman–machine interfaceSecurity alarm
The invention belongs to bridge construction, and particularly relates to dynamic real-time monitoring method for concrete bridge prestressed tendon tensioning force and a special prestress construction system. The dynamic real-time monitoring method for the concrete bridge prestressed tendon tensioning force includes the steps of initializing and real-time dynamic control loading. The prestress construction system comprises at least one tensioning device, and each tensioning device comprises a hydraulic station, a reversing valve bank, a jack, an A / D data collecting module, a PLC, a central processing unit, a human-computer interface, a direct force measuring device, a hydraulic force measuring device, a prestressed tendon elongation measuring device, a friction resistance test device and a security alarm device. The double-control requirement, difficult to met in the prior art, for taking stress control as the principle thing and an elongation value as a checking item is met, the dynamic real-time monitoring method has the advantages that construction quality and safety can be effectively ensured, and problems found in the tensioning process can be solved in time.
Owner:CHINA RAILWAYS CORPORATION +3
Drive circuit for active matrix organic luminous display device
ActiveCN101281720ALine scanning circuit is simpleSimple designCathode-ray tube indicatorsDigital analog converterEngineering
The present invention discloses a driving circuit for an active matrix organic illuminated display device; the driving circuit comprises: a driving circuit, a display pixel circuit; a signal regulation and correction circuit composed of a search table, a counter, a digital-analog converter (DAC), an analog-digital converter (ADC), and a driving and feedback controller; the driving circuit outputs line scan signal and display driving signal; the pixel circuit comprises a detection pixel circuit and a display pixel circuit, wherein, the detection pixel circuit is connected to the signal regulation and correction circuit, and the display pixel circuit is connected to the driving circuit; wherein, when the correction function is enabled, the signal regulation and correction circuit produces and regulates a detection driving signal for the detection pixel circuit according to the voltage feedback, and updates the search table according to the detection driving signal; during normal display, the signal regulation and correction circuit produces corrected display data from the display data input against the search table, and transmits the corrected display data to the driving circuit. The driving circuit can implement the most simplified design of the display pixels while avoiding complex line scan circuit.
Owner:NANJING CEC PANDA LCD TECH
Method and device for generating alternate routes of coverage network
InactiveCN101562568AImprove hit rateReduce the possibility of failureData switching networksDistributed computing
The invention provides a method for generating alternate routes of a coverage network, which comprises that: identification server nodes in the coverage network performs network ranging on forward nodes to calculate the comprehensive performance similarity of any two forward nodes, and the comprehensive performance similarity establishes a logic forward network for the forward nodes with similar performance; access server nodes forward node messages according to requests of user nodes, selects the logic forward network in a free field where the user nodes are positioned, and then finds service forward nodes through inlet forward nodes of the logic forward network; the service forward nodes operate a BFBB algorithm on the logic forward network where the service forward nodes are positioned, and select the forward nodes as primary candidate forward nodes according to an operation result; and the routes which can be formed by the candidate forward nodes are subjected to performance detection, the candidate forward nodes passing the performance detection are remained, and when service communication is carried out between the user nodes, proper forward nodes are selected from the remained candidate forward nodes according to the service so as to establish the alternate routes.
Owner:INST OF COMPUTING TECH CHINESE ACAD OF SCI
Soft robotic actuators utilizing asymmetric surfaces
InactiveCN107002721ASimplify the modeling processSimplify the design processProgramme-controlled manipulatorGripping headsInternal pressureControl theory
A soft robotic actuator is disclosed. The actuator includes a first portion with a substantially constant profile and a second portion with a regularly varying profile, and bends in a pressure-dependent fashion as the internal pressure within the actuator is increased or decreased. The present invention addresses the needs described above by providing actuators that are configured to perform new fundamental motions through the inclusion of design elements which can be configured, through the manipulation of a relatively short list of parameters, to undergo specific pressure-actuated changes which can be designed using quantitative modeling techniques.
Owner:SOFT ROBOTICS
Method for jointly evaluating insulation state of oil paper by using multiple statistical parameters
ActiveCN102193052AEasy to drawDoes not affect the mode of operationTesting dielectric strengthUltra-widebandEngineering
The invention relates to a method for jointly evaluating the insulation state of oil paper by using multiple statistical parameters, characterized by comprising the following steps of: using an ultra-wideband partial discharge detection system to perform partial discharge detection on the oil paper insulation in a power device; collecting and extracting the partial discharge statistical parameters of the oil paper insulation; by analyzing the change trends of seven statistical parameters, evaluating the insulation state of the oil paper insulation in the power device; and if NpSEC and Hn_Sk present a monotone increasing trend and the alfa, beta, Qmax, Hn_mean and Hqn_Kur present a monotone decreasing trend, judging that the oil paper insulation in the power device is in a deterioration state. The method can be used for forecasting the hazard degree of the partial discharge before the insulation has fault. The method can be used for preventing the insulation fault and reducing the fault possibility of the power device caused by insulation fault, has high accuracy and low dispersivity, is convenient to realize, and does not influence running of the power device.
Owner:STATE GRID HUBEI ELECTRIC POWER RES INST +1
Sewing machine with dust collection device
InactiveCN103510303AReduce the possibility of failureAvoid accumulationSewing-machine elementsThermodynamicsEngineering
The invention relates to a sewing machine, in particular to a sewing machine with a dust collection device. The sewing machine comprises a fan, an air suction pipeline and a dust collecting bag. A suction opening of the air suction pipeline is formed below a needle plate, the other end of the air suction pipeline is connected with the fan, and an air outlet of the fan is connected with the dust collecting bag. Due to the fact that the air suction pipeline is arranged below a bottom plate of the sewing machine, dust generated in the sewing process can be effectively removed and prevented from accumulating on various movable parts, and the probability that the sewing machine breaks down is reduced. A dust blowing mode is changed into a dust suction mode, so that pollution caused by the dust to workshop environment is reduced, and air quality in a workshop is guaranteed.
Owner:中江县四海制衣有限责任公司
A method and system for filtering instant communication rubbish information
ActiveCN101166160AReduced load and potential for failureImprove reliabilityNetwork connectionsSpecial data processing applicationsCommunications serverClient-side
The invention includes following steps: predefined keyword library is stored in instant communication client end (ICCE); ICCE validates whether the received instant information is garbage information based on the said keyword library; if yes, then marking the received instant information as garbage information. Thus, the invention prevents instant communication server from filtering garbage information so as to reduce burthen of server, and guarantee stable operation of server. Moreover, the invention can filter out garbage information of instant communication even in communication mode of point to point.
Owner:ALIBABA GRP HLDG LTD
Slag fishing robot and using method thereof
ActiveCN109423588ARealize continuous production with automatic controlNo need for manual deslaggingHot-dipping/immersion processesSlagEngineering
The invention provides a slag fishing robot and a using method thereof. The slag fishing robot comprises a robot arm, a movable guide rail and a slag removal head clamp device, wherein the robot arm is arranged on the movable guide rail through bolts; the movable guide rail is driven by a servo motor and is driven by a gear rack, the movable guide rail is designed to be of a fully-closed structure, limiting switches are installed at the limit positions of the left end and the right end of the movable guide rail, and the robot can stop immediately when the robot reaches the left limit and the right limit; and one end of the slag removal head clamp device is installed on a mechanical arm flange plate. The slag fishing robot and the using method thereof can realize full-automatic slag removal, and comprises automatically positioning zinc slag and automatically selecting a slag removal tool, the height of the zinc slag in a slag hopper is positioned, the slag in the zinc pot is removed, and the waste slag is recycled.
Owner:SHANGHAI BAOSIGHT SOFTWARE CO LTD
Method for producing a fuselage cell of an aircraft
InactiveCN101341067AReduce in quantityImprove assembly accessibilityAircraft assemblyFuselagesElectricityThermal insulation
The invention relates to a method for producing at least one fuselage cell of an aircraft with the following steps : at least partial production of surface protection and thermal insulation in the region of the at least one shell part, at least partial introduction of technical outfitting systems 1-3, 10-12, 22-24, 46-48, in particular of electrical and hydraulic lines, air-conditioning lines, electrical and hydraulic appliances, sanitary and catering equipment or the like, into the at least one shell part and / or the at least one floor grid 13, 41, and assembly of the at least one shell part and of the at least one floor grid 13, 41 into the at least one fuselage section 32.
Owner:AIRBUS OPERATIONS GMBH
Constraint system of bilateral shoulder belt type car belt
InactiveCN1519146AEasy to adjustImprove protectionSemi-passive restraint systemsBucklesEngineeringAutomobile safety
Owner:许朝霞
Full-electronic turnout position detection device
ActiveCN107891884ASimple topologyReduce in quantityElectric devices for scotch-blocksRailway auxillary equipmentLocation detectionDriving circuit
The invention discloses a full-electronic turnout position detection device. The device comprises a 110VAC reference signal circuit, a positioning detection circuit, an anti-position detection circuit, a normal indication relay and a reverse indication relay which are respectively connected with a forward direction drive circuit and a backward direction drive circuit. The 110VAC reference signal circuit comprises circuits X1, X2, X3, X4 and X5 connected with a switch machine, the positioning detection circuit is connected with the circuits X2 and X4, a diode is installed on the circuit X4, theanti-position detection circuit is connected with the circuits X3 and X5, a diode is installed on the circuit X5, the circuit X1 is connected with a fire wire, the forward direction drive circuit isconnected with a first processor, the backward direction drive circuit is connected with a second processor, and the normal indication relay and the anti-position indication relay are connected with the first processor and the second processor. By the combination of the outer switch machine and the diode, the detection of a position signal is achieved, and the circuit structure is simple.
Owner:浙江众合科技股份有限公司
Integrated semi-direct drive wind generator transmission chain and gearbox for same
The invention provides an integrated semi-direct drive wind generator transmission chain and a gearbox for the same. The gearbox comprises a front box body (6), a rear box body (14), a spindle (5) and a planetary carrier (10), a large-diameter portion (5-3) of a downwind end of the spindle is fixedly connected with an inner gear ring (7), the inner gear ring (7) is engaged with at least three idle gears (8) mounted on the planetary carrier (10), the inner gear ring (7), the idle gears (8) and a first planetary gear form a primary fixed shaft transmission pair, a portion of each planetary gear shaft (13) extending out of the planetary carrier (10) is connected with a secondary planetary gear (15), the secondary planetary gear (15) is positioned in a cavity formed by the planetary carrier (10) and the rear box body (14) and engaged with the same sun gear (17), and the secondary planetary gear (15) and the sun gear (17) form a secondary fixed shaft transmission pair. The gearbox has the advantages of integration, light weight, short axial length, convenience in disassembly and assembly and the like.
Owner:CRRC QISHUYAN INSTITUTE CO LTD
Method for lightning protection measure simulation of HUV transformer
InactiveCN105045974AOptimization of lightning protection measuresReduce the possibility of failureSpecial data processing applicationsOvervoltageUltra high voltage
The invention discloses a method for lightning protection measure simulation of an HUV (Ultra High Voltage) transformer. The method comprises the following steps of: 1, building an HUV transformer simulation model, a lightning simulation model and a lightning protection device simulation model; 2, changing factors influencing the lightning wave overvoltage, and transmitting lightning waves generated by acting the lightning simulation model onto a power transmission line to the HUV transformer simulation model along the power transmission line to produce overvoltage; and 3, installing the lightning protection device simulation model in the HUV transformer simulation model, transmitting the lightning waves generated by acting the lightning simulation model onto the power transmission line to the HUV transformer simulation model along the power transmission line, and performing lightning protection measure simulation. The method has the advantages that a work principle of the lightning protection measure of the HUV transformer in the lightning protection process is sufficiently realized; and the fault occurring probability of the HUV transformer due to lightning attack is reduced.
Owner:BEIJING KEDONG ELECTRIC POWER CONTROL SYST +1
Harmonic-wave speed reducer with improved structure
The invention discloses a harmonic-wave speed reducer with an improved structure of double rigid wheels. Two identical flexible bearings are mounted onto a wave generator. Flexible wheels are circular ring-shaped and mounted onto outer rings of the flexible bearings. The number of internal teeth of a first rigid wheel is greater than that of external teeth of each flexible wheel by two. The first rigid wheel, a rear end cover and an inner ring of a criss-cross roller bearing are connected together as a fixing end of the harmonic-wave speed reducer. The number of internal teeth of a second rigid wheel is the same as that of external teeth of each flexible wheel. The second rigid wheel, a front end cover and an outer ring of the criss-cross roller bearing are connected together as an output end of the harmonic-wave speed reducer.The harmonic-wave speed reducer with the improved structure has a reasonable structure and high load-carrying and impact-resisting capabilities.
Owner:上海鑫君传动科技有限公司
Fluorescent electronic protective paint and preparation method thereof
InactiveCN107805434AProtection from waterReduce the possibility of failureLuminescent paintsVisibilityHard disc drive
The invention discloses a fluorescent electronic protective paint and a preparation method thereof. The paint comprises 40-90 weight parts of a fluorinated acrylate monomer, 1-50 weight parts of a non-fluoroacrylate monomer, 0.01-5 weight parts of a fluorescent monomer, and 0.1-5 weight parts of a dopamine monomer with double-bond. The invention utilizes an emulsion method to prepare the fluorescent visual protective paint composition, and the preparation process is efficient, economical and environment-friendly. The prepared paint has strong adaptability and durability. The paint compositionprepared according to the invention can be applied to various materials, especially to waterproof paint of printed circuit boards, hard disk drive components, electronic components, display screens, touch screen components and other electronic components. In addition, the coating has fluorescence visibility and stable fluorescence effect, and is convenient for quality control in a detection and coating process.
Owner:ZHEJIANG UNIV
Through hole processing method
ActiveCN102130045AGood shape coverageReduce the possibility of failureSemiconductor/solid-state device manufacturingEngineeringDevice failure
The invention relates to a through hole processing method which comprises the following steps of: providing a masking film; etching a substrate according to the masking film to form a through hole; partially filling the through hole so as to form an insulated oxidization layer with fixed-shape coverage on the lateral wall of the through hole; and removing the masking film. The through hole processing method provided by the invention can eliminate the influence of a scallop appearance of the lateral wall of a silicon through-hole generated through a Bosh etching process on a follow-up process, and an insulated oxide layer thin film with a smooth surface is formed on the lateral wall of the silicon through-hole, therefore, the fixed-shape coverage performance of the insulated oxide layer thin film is improved, the follow-up silicon through-hole filling difficulty is reduced, and the reliability of device failure is finally reduced.
Owner:SHANGHAI INTEGRATED CIRCUIT RES & DEV CENT +1
Torsional impact drilling tool
ActiveCN101463709BReduce stick-slipReduce the possibility of failureVibration drillingDrive shaftRate of penetration
Owner:SOUTHWEST PETROLEUM UNIV
Method and system for verifying file integrity through internet
ActiveCN103780632AIncrease the difficultyReduce the possibility of failureTransmissionSignature fileThe Internet
The invention relates to the field of file integrity verification and relates to a method and a system for verifying file integrity through the internet. The verification method includes the following steps that a client side calculates a hashed value H of a file F, sends the H to a verification server, and simultaneously, requests the verification server to generate signature certificates for the hashes value H, the verification server uses a dissymmetrical public and private key algorithm as a signature method, generates the n signature certificates for the hashed value H, saves relevant information of the signature certificates using the hashed value H as a keyword to a database, and returns a file A containing the signature certificates to the client side, the client side packs the files A and F into a file X and releases the file X to a download server, the client side acquires a copy X' of the file X from the download server and unpacks the X' to obtain a file F' and the n signature files, one of off-line verification and on-line verification is used to verify whether the F and the F' correspond to each other, the file is integral if the F and the F' correspond to each other, and otherwise, the file is not integral.
Owner:SYSU CMU SHUNDE INT JOINT RES INST
Semi-automatic mortising machine
InactiveUS20050145297A1Reduce the possibility of failureEasy maintenanceTongue/grooves making apparatusMulti-purpose machinesMortise and tenonSemi automatic
A semi-automatic mortising machine includes a support base, a support bar, a guide device, a working device, a distance adjusting device, and a dust collection box. Thus, the displacement direction can be controlled in a manual manner during the working process, and the cutting operation is performed in an automatic manner so as to cut the mortises and tenons in the workpiece.
Owner:CHANG CHI LO
A key node identification method based on weighted power flow entropy and voltage stability
ActiveCN109217296AMake up for limitationsImprove accuracyAc networks with different sources same frequencyPower gridPerformance index
The invention provides a method for identifying key nodes of power network based on weighted power flow entropy and voltage stability, A technical field of identify key links of power network is disclosed, By acquiring basic data in the power grid system, the load rate and the weight corresponding to the load rate of the corresponding line of any node are calculated according to the active power,and the load rate is weighted and normalized, Then the load flow entropy of any node corresponding to the active power is calculated, and the weighted load flow entropy of any node is calculated according to the load rate and load flow entropy after weighted and normalized processing, and the voltage stability performance index is introduced, and the sum of the weighted load flow entropy and loadflow entropy after normalized processing is used as the basis for identifying the key nodes of the power network. Through the technical proposal of the invention, the limitation of the power flow entropy in identifying the key nodes of the power network is remedied, the accuracy and reliability of identifying the key nodes of the power network according to the weighted power flow entropy are improved, and the possibility of the cascading trip accident of the power network is reduced.
Owner:STATE GRID JIBEI ELECTRIC POWER COMPANY +1
Layered data transmission method and device of wireless sensor network
InactiveCN105430598AIncrease success rateReduce energy drainParticular environment based servicesNetwork topologiesWireless mesh networkWireless sensor networking
The invention provides a layered data transmission method and device of the wireless sensor network, and the method an device are applied to a cluster head node a of a random cluster A in the wireless sensor network. The method comprises that collection data sent from different cluster nodes in the cluster A is received; according to a preset cluster data fusion rule, cluster data fusion is carried out on the received collection data to generate fusion data DI; according to a preset forwarding cluster determining rule, a cluster B in a next layer LB of the layer LA where the cluster A is placed is determined, and an initial forwarding cluster head node is directed to the cluster head node b in the cluster B; and the fusion data DI is transmitted to the initial forwarding cluster head node, so that according to a preset cluster data forwarding rule, the initial forwarding cluster head node carries out layered data transmission till the fusion data is transmitted to a gathering node. According to the invention, the possibility that the cluster head node a is in failure due to energy exhaustion in the process that the data is transmitted to the gathering node is reduced, and the success rate of data transmission is improved.
Owner:中央军委后勤保障部信息中心
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