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38results about How to "Avoid secondary failure" patented technology
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Open-circuit fault diagnosis method for switch tubes of single-phase cascaded H-bridge rectifier
The invention discloses an open-circuit fault diagnosis method for switch tubes of a single-phase cascaded H-bridge rectifier. According to a system switch control signal and alternating-current sidecurrent polarity, switch functions under normal operation and different switch tube faults are calculated; and an output current calculation model and a state estimation model of a single-phase cascaded H-bridge rectifier module are obtained according to circuit topology of the cascaded H-bridge rectifier, and a calculated value and an estimated value of an output current are obtained. Based on characteristics that fault features of current residuals of different modules are separated and different fault diagnosis variables are mutually independent, any faulted switch tube can be positioned bycomparing the diagnosis variables with a self-adaptive detection threshold value. According to the method, the real-time diagnosis of the single-phase cascaded H-bridge rectifier in one or more switch tube fault states in an on-line real-time system can be realized, and the influence of network voltage fluctuation, load variation and operation condition change of the single-phase cascaded H-bridge rectifier is avoided; and moreover, the diagnosis time is short, the faults can be isolated in time, and the occurrence of secondary faults of the system is avoided.
Owner:SOUTHWEST JIAOTONG UNIV
Cascaded H-bridge converter fault diagnosis method based on voltage residual
ActiveCN110376471ARealize online real-time monitoringNot subject to network pressure fluctuationsCircuit interrupters testingControl signalDiagnosis methods
The invention discloses a cascaded H-bridge converter fault diagnosis method based on a voltage residual. The method comprises the following steps of step1, according to a system switch control signaland an alternating current side current polarity, acquiring switch functions under a normal condition and different switch tube faults; step2, obtaining a single-phase cascaded H-bridge converter input voltage calculation model and a state estimation model of a corresponding module; step3, obtaining theoretical analysis values of a voltage residual under the different faults; and step4, accordingto the theoretical analysis value of the voltage residual, designing two types of counters to obtain a maximum positioning fault module, and further determining the fault switch tube through combining a switch signal. The method can be integrated into a controller, real-time performance is good, and real-time diagnosis of the single-phase cascaded H-bridge converter fault module and an open-circuit fault switch is realized.
Owner:SOUTHWEST JIAOTONG UNIV
Fireproof power cable trench
PendingCN108695807ARealize the effect of self-extinguishing fireAvoid secondary failureCable installations on groundFire rescuePower cableElectric cables
The invention belongs to the technical field of power facilities and particularly relates to a fireproof power cable trench. The fireproof power cable trench comprises multiple trench bodies; each trench body comprises a bottom plate, side baffles and a cover plate; one accommodating cavity and multiple discharge ports are arranged in the side baffles and on the cover plate; the discharge ports are located at the inner side of the cable trench; the accommodating cavity and the multiple discharge ports are communicated; the accommodating cavity is internally provided with a fireproof material;and the discharge port is provided with a plugging mechanism. Through improving the structure of the trench body, the accommodating cavity with the fireproof material is arranged in the side baffles and the cover plate, self extinguishing is carried out while waiting for rescue, and secondary fault of a power device is avoided.
Owner:国网河南省电力公司桐柏县供电公司
Three-phase fault-tolerant inverter circuit and control method thereof
InactiveCN103944436ASimple control methodSimple structureAc-dc conversionEmergency protective circuit arrangementsEngineeringThree-phase
The invention discloses a three-phase fault-tolerant inverter circuit and a control method thereof. The three-phase fault-tolerant inverter circuit comprises a direct current power supply and an inverter bridge, the upper bridge arm of a first inverter bridge arm is connected with a high-speed fuse F1 while the lower bridge arm is connected with a high-speed fuse F4, the upper bridge arm of a second inverter bridge arm is connected with a high-speed fuse F3 while the lower bridge arm is connected with a high-speed fuse F6, and the upper bridge arm of a third inverter bridge arm is connected with a high-speed fuse F5 while the lower bridge arm is connected with a high-speed fuse F2; an auxiliary inverter circuit is connected between the direct current power supply and the inverter bridge and is composed of an auxiliary upper bridge arm insulated gate bipolar transistor Q7, an auxiliary lower bridge arm insulated gate bipolar transistor A8, an auxiliary first inverter bridge arm insulated gate bipolar transistor S1, an auxiliary second inverter bridge arm insulated gate bipolar transistor S2, an auxiliary third inverter bridge arm insulated gate bipolar transistor S3 and single-phase bridge rectifiers Z1, Z2 and Z3. The three-phase fault-tolerant inverter circuit and the control method thereof realize to isolate the fault of the bridge arm with short circuit or open circuit fault and have good fault-tolerant running function.
Owner:XIAN UNIV OF SCI & TECH
Elevator safe operation data coupling device and operating method
The invention discloses an elevator safe operation data coupling device and an operating method. The elevator safe operation data coupling device comprises a plurality of passive Rfid labels arranged on movable door leaves of an elevator and all floor flat layer positions, and an Rfid reader arranged on a lift car of the elevator. When the movable door leaves of the elevator are completely opened, the Rfid reader can trigger the Rfid labels arranged on the movable door leaves; when the elevator reaches the floor flat layer positions, the Rfid reader can trigger the Rfid labels arranged on all the floor flat layer positions; the Rfid reader transmits data received in a wireless communication manner to a data monitoring center. The elevator safe operation data coupling device and the operating method have the advantages that elevator operation information is directly collected through a data coupling system formed by electronic tags and a scanning device, a physical sensor is not needed, a great amount of cost for entity wire arrangement, equipment purchase, debugging and maintenance is saved, resources are saved, and resultant secondary failures are avoided.
Owner:范奉和 +1
Fault processing method of traction driving system and electric vehicle
ActiveCN112848896AAvoid secondary failureElectric devicesElectric energy managementInformation controlControl engineering
The invention provides a fault processing method of a traction driving system and the traction driving system. The traction driving system comprises a motor controller and a motor, and the method comprises the steps of obtaining fault state information of the traction driving system; obtaining a direct current end bus voltage of the motor controller; determining whether the motor enters a short-circuit mode or an idling mode based on the direct current end bus voltage and the fault state information; when it is determined that the motor enters the short-circuit mode, obtaining the state information of all power switch devices in the motor controller, and the state information of the power switch devices being used for reflecting whether each power switch device breaks down or not; and according to the state information of the power switch devices, controlling the power switch devices to execute corresponding operations, so that the motor works in the short-circuit mode. When the traction driving system breaks down, the motor can be in a safe state.
Owner:BYD CO LTD
Open-circuit fault diagnosis method for dual-active-bridge DC-DC converter
ActiveCN112710922AMeet the test requirementsShort diagnosis timeFault locationElectrical polarityHemt circuits
The invention discloses an open-circuit fault diagnosis method for a dual-active-bridge DCDC converter. The method specifically comprises the following steps of: calculating the switching function of two H bridges of the dual-active-bridge DC-DC converter according to a system driving pulse signal and the polarity of primary side inductive current; calculating an inductive current state estimation model of the dual-active-bridge DC-DC converter according to the circuit topology and the working principle of the dual-active-bridge DC-DC converter; and designing a fault diagnosis algorithm according to inter-bridge-arm voltage characteristics and current residual characteristics under the fault. According to the method of the invention, monitoring of the working state of the dual-active-bridge DC-DC converter and rapid and accurate diagnosis under different switching tube faults are realized, and a new diagnosis idea is provided for the fault diagnosis technology of the dual-active-bridge DC-DC converter.
Owner:SOUTHWEST JIAOTONG UNIV
Fault diagnosis method for medium-voltage modular multilevel converter
PendingCN113159119AImprove generalization abilityImprove diagnostic accuracyElectrical testingCharacter and pattern recognitionNew deviceCapacitance
The invention relates to a fault diagnosis method for a medium-voltage modular multilevel converter (MMC), which belongs to the field of power electronics, and comprises the following steps of: constructing a data set by using the collected capacitor voltage values of each sub-module and the current values of each bridge arm of the MMC, wherein the data set comprises normal operation state data and fault operation state data of sub-modules of the MMC; carrying out one-hot coding on the sample set according to the operation state of the modular multilevel converter to obtain a coding vector as a class label; performing parameter training on the training set by adopting a neural network and based on a BP back propagation algorithm to obtain a modular multilevel converter fault diagnosis model; and inputting the test set into an MMC fault diagnosis model, performing open-circuit fault diagnosis on each sub-module of the modular multilevel converter, and obtaining a fault type through matching with a class label. New devices such as sensors do not need to be introduced, and the system cost and complexity are not increased.
Owner:DALIAN UNIV OF TECH
Wall-hung furnace and control method thereof
The invention provides a wall-hung furnace and a control method thereof. The control method comprises the steps that when a fault occurs, whether the fault is a simple fault or not is judged, and the simple fault is a fault which can be maintained without machine disassembly; and if the fault is a simple fault, a fault processing video corresponding to the simple fault is played. According to the design, the video corresponding to the simple fault is played for guiding simple fault maintenance by a user, a secondary fault caused by the simple fault is avoided, the maintenance time is shortened, and the maintenance cost is saved; and digital information such as fault codes is changed into three-dimensional information through video playing, the method is more visual and more humanized aiming at people who do not read instructions or lack relevant professional knowledge, and the user experience of the wall-hung furnace is improved.
Owner:GREE ELECTRIC APPLIANCES INC
Ammeter fault studying and judging method, device and equipment and readable storage medium
PendingCN114662589AImprove troubleshooting efficiencyAvoid secondary failureCharacter and pattern recognitionElectrical measurementsFault occurrenceElectricity meter
The invention discloses an electricity meter fault studying and judging method, device and equipment and a readable storage medium. The method comprises the steps of obtaining historical fault information of each electricity meter and fault information of a current fault electricity meter; determining a fault state code corresponding to each piece of fault information in the historical fault information; the types of fault state transition groups in the historical fault information and the number of the fault state transition groups are counted, and a fault state transition matrix is generated according to a statistical result; determining a target fault state code corresponding to the fault information of the current fault ammeter according to the fault information of the current fault ammeter; and according to the fault state transition matrix and the target fault state code, determining a fault research and judgment result of the current fault ammeter. According to the fault research and judgment result, the operation and maintenance personnel inspect the possible secondary fault problem in advance to avoid the secondary fault, or during the secondary fault inspection, the fault type with the high probability is preferentially detected to improve the fault inspection efficiency during maintenance.
Owner:GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD +1
Two-phase short-circuit fault locating and fault-tolerant operation controlling method for brushless DC motor
ActiveCN108667352ANo increase in the number of winding redundancyImplement fault-tolerant controlCommutation monitoringSingle motor speed/torque controlComputer moduleData acquisition
The invention discloses a two-phase short-circuit fault locating and fault-tolerant operation controlling method for a brushless DC motor, comprising the steps of: 1.acquiring and transmitting three-phase current data; 2. analyzing and processing the three-phase current data and locating two-phase short-circuit fault of the brushless DC motor; 3.using a microprocessor module to perform four-step commutation and fault-tolerant operation control on the brushless DC motor according to the two-phase short-circuit fault locating result. The method has the advantages of simple steps, convenient implementation and high accuracy, and can carry out fault locating in a short time. The fault-tolerant operation controlling method can ensure that the brushless DC motor still operates stably and reliably after the two-phase short-circuit fault of a winding, and effectively improves the reliability and stability of the brushless DC motor system. The fault-tolerant operation controlling method has excellent practicality and good effects, and easy to popularize.
Owner:西安铂士顿电气设备制造有限公司
Transaction channel management method and device, server and storage medium
ActiveCN110175830AImplement management methodsAvoid secondary failureFinancePayment architectureUsabilityChannel management
The embodiment of the invention discloses a transaction channel management method and device, a server and a storage medium. The method comprises the steps of if a normal transaction channel with therequest success rate of a transaction request not meeting the preset requirements exists, setting the normal transaction channel as an abnormal transaction channel, and reallocating a transaction channel to a to-be-processed transaction request corresponding to the abnormal transaction channel, waiting for preset time, and determining whether the abnormal transaction channel is maintained or not according to at least two stages of success rate judgment modes, and if the maintenance of the abnormal transaction channel is completed, setting the abnormal transaction channel as a normal transaction channel. According to the technical scheme provided by the embodiment of the invention, the problem that in the prior art, the available transaction channel is not timely switched or the available transaction channel is switched, so that a secondary fault easily occurs, is solved, so that the state of the transaction channel is accurately switched in the process of executing the transaction request, and the stability and the usability of the system are improved.
Owner:SHENZHEN LEXIN SOFTWARE TECH CO LTD
High-power four-quadrant converter fault-tolerant control method based on predictive control
ActiveCN113193759AOvercoming the aggravation of capacitor voltage imbalanceAvoid secondary faults and decrease in control accuracyElectronic commutation motor controlAC motor controlElectric driveContinuous operation
The invention provides a high-power four-quadrant converter fault-tolerant control method based on predictive control. The method comprises the following steps: acquiring converter parameter data after a fault bridge arm and a multiplexing bridge arm are connected through a bidirectional thyristor; blocking the switching signal of the fault bridge arm, and recombining the switching state of the converter according to the obtained parameter data; traversing all combined switch states, and predicting a system state quantity at a certain moment in the future; taking the minimum weighted sum of the network side cost function and the machine side cost function as a target to obtain an optimal combined switch state; performing converter control according to the optimal combined switch state. According to the method, the phenomenon of capacitor voltage unbalance aggravation in a traditional solution is overcome, the problems of secondary faults and control precision reduction caused by the phenomenon are avoided, continuous operation of a converter system under the fault condition is fully guaranteed under the condition that the degree of freedom of the switching state is not limited, and the reliability and the stability of the electric drive system are better improved.
Owner:SUZHOU RES INST SHANDONG UNIV
Open-circuit fault diagnosis method and device, motor controller and storage medium
PendingCN111090030AAvoid secondary failureReduce open circuit fault diagnosis timeContinuity testingIndividual semiconductor device testingElectric machineryThree-phase
The invention discloses an open-circuit fault diagnosis method and device, a motor controller and a computer readable storage medium. The method comprises the steps of determining three-phase reference current values, and acquiring three-phase actual current values; for each phase in the three phases, calculating a difference value between the phase actual current value and the phase reference current value; and judging whether a power tube open-circuit fault occurs or not according to the difference value. By adopting the scheme of the invention, open-circuit fault diagnosis is carried out based on the difference value between the reference current and the actual current, the open-circuit fault diagnosis time is shortened on the premise of not adding an additional sensor, the diagnosis result has relatively high reliability, and a secondary fault caused by a power switch tube fault of a vehicle motor system can be prevented.
Owner:WEICHAI POWER CO LTD
Indoor waterproof leakage monitoring insulating top shell device
InactiveCN112909754AAvoid secondary failures with unstable operationGuaranteed stable operationTransformer housesRoof drainageWater leakageElectric equipment
The invention relates to an indoor waterproof leakage monitoring insulating top shell device which is technically characterized by comprising a waterproof leakage monitoring insulating top shell and a water guide supporting device installed at the lower end of the waterproof leakage monitoring insulating top shell. The waterproof leakage monitoring insulating top shell is made of a waterproof leakage monitoring insulating plate with the high middle and the two low sides, and water collecting grooves are formed in the lower edges of the two sides of the waterproof leakage monitoring insulating plate; and a drainage hole is formed in the water collecting groove and is used for draining water in the water collecting groove through the water guide supporting device. The water collecting groove is formed in the lower edge of the waterproof leakage monitoring insulation top shell, water in the water collecting groove is discharged through the water guiding supporting device at the bottom, and the functions of water prevention, water leakage monitoring, water leakage guiding, electrical insulation and isolation and the like are achieved; and meanwhile, the moisture-sensitive ink layer with uniform net-shaped patterns is arranged on the waterproof leakage-monitoring insulating top shell, so that maintenance personnel can find the water dripping condition and deal with the water dripping problem in time, and normal operation of the high-voltage electrical equipment is ensured.
Owner:TIANJIN DONGJIA ELECTRIC POWER ENG TECH CO LTD
Three-phase fault-tolerant inverter circuit and control method thereof
InactiveCN103944436BSimple control methodSimple structureEmergency protective circuit arrangementsAc-dc conversionThree-phaseDirect current
The invention discloses a three-phase fault-tolerant inverter circuit and a control method thereof. The three-phase fault-tolerant inverter circuit comprises a direct current power supply and an inverter bridge, the upper bridge arm of a first inverter bridge arm is connected with a high-speed fuse F1 while the lower bridge arm is connected with a high-speed fuse F4, the upper bridge arm of a second inverter bridge arm is connected with a high-speed fuse F3 while the lower bridge arm is connected with a high-speed fuse F6, and the upper bridge arm of a third inverter bridge arm is connected with a high-speed fuse F5 while the lower bridge arm is connected with a high-speed fuse F2; an auxiliary inverter circuit is connected between the direct current power supply and the inverter bridge and is composed of an auxiliary upper bridge arm insulated gate bipolar transistor Q7, an auxiliary lower bridge arm insulated gate bipolar transistor A8, an auxiliary first inverter bridge arm insulated gate bipolar transistor S1, an auxiliary second inverter bridge arm insulated gate bipolar transistor S2, an auxiliary third inverter bridge arm insulated gate bipolar transistor S3 and single-phase bridge rectifiers Z1, Z2 and Z3. The three-phase fault-tolerant inverter circuit and the control method thereof realize to isolate the fault of the bridge arm with short circuit or open circuit fault and have good fault-tolerant running function.
Owner:XIAN UNIV OF SCI & TECH
A Fault Tolerance System of Magnetic Suspension Control Moment Gyro High Speed Rotor Inverter
ActiveCN104135216BReduce power consumptionImprove reliabilityElectric motor controlEfficient power electronics conversionGyroscopeControl moment gyroscope
A fault tolerant topology structure of a high-speed rotor inverter of a magnetic suspension control torque gyroscope is mainly composed of a Buck DC-DC converter with a redundancy tube, a four-leg phase redundancy inverter, a fault protection circuit, a small armature and inductance permanent magnet brushless DC motor and the like. According to the characteristics of the small armature and inductance permanent magnet brushless DC motor, the redundancy topology structure is designed based on a motor drive circuit with the Buck DC-DC converter and a three-phase full-bridge inverter, reliability of a high-speed rotor drive circuit of the magnetic suspension control torque gyroscope is improved, and fault tolerant control is achieved after a power tube is disconnected or short-circuits; meanwhile, a drive system has the advantage of low power consumption before and after a fault happens, and the structure has high application value for spacecrafts paying attention to low power consumption and high reliability.
Owner:安徽华驰动能科技有限公司
Flushing and detecting system of triple valve, solvent valve and spray gun of automata
ActiveCN102069081BAvoid secondary failureImprove flushing effectDetection of fluid at leakage pointMachine part testingDiaphragm pumpEngineering
The invention relates to a flushing and detecting system of a triple valve, a solvent valve and a spray gun of an automata, which comprises a compressed air supply device, a solvent supply device, a diaphragm pump and a plurality of pipelines, wherein the diaphragm pump is connected with the solvent supply device to pump out solvents in the solvent supply device with certain pressure; the pipelines are correspondingly connected to make the solvents and compressed air enter the solvent valve, the triple valve and the spray gun so as to clean the solvent valve, the triple valve and the spray gun, and after cleaning, the solvents flow back to the solvent supply device through a backflow pipe so as to be recycled. The flushing and detecting system of the solvent valve, the triple valve and the spray gun of the automata simulates the working principle of the automata to mix the solvents and the compressed air with certain pressure and further clean the valves and the spray gun with a good cleaning effect, and simultaneously whether a valve core is damaged or shifted or not is judged through observing the movement situation and the leakage condition of the valve core in air control.
Owner:GAC HONDA AUTOMOBILE CO LTD
A Fault Diagnosis Method for Switch Tube Open Circuit of Single-phase Cascaded H-bridge Rectifier
ActiveCN110133423BImprove versatilityShort diagnosis timeShort-circuit testingControl signalHemt circuits
Owner:SOUTHWEST JIAOTONG UNIV
A method of restoring self-growth
ActiveCN104821583BEasy to handleReduce processing timeLoad forecast in ac networkContigency dealing ac circuit arrangementsReal time analysisElectric power system
The invention relates to the field of an electric power system, and discloses a method for restoring self-growth. The method is based on a power distribution terminal which monitors a power distribution line and is used for analyzing the information of the power distribution line in real time. After a fault occurs, fault information is successively transmitted to a tie switch power distribution terminal from a fault point power distribution terminal. The tie switch power distribution terminal starts restoring of a non-fault area. Directly monitored areas are successively analyzed. According to a line operation topology, self-growth analysis is performed until the area where power supply can be restored. The terminal which directly manages the switch bypasses the switch and insulates the area which requires power supply restoring. Furthermore a terminal which directly manages the tie switch switches on the tie switch, thereby finishing power supply restoring to the non-fault area.
Owner:DONGFANG ELECTRONICS
A hydraulic cylinder equipped with a device that automatically detects and treats leaks
ActiveCN113323938BGood sealing environmentEasy to detectFluid-pressure actuator testingServomotor componentsHydraulic cylinderMechanical components
The invention relates to the field of hydraulic power mechanical components, and discloses a hydraulic cylinder equipped with a device for automatically detecting and processing liquid leakage. The front end of the cylinder casing is fixedly connected with a right hydraulic oil valve, the upper end of the right hydraulic oil valve is provided with a hydraulic oil main port, a limit block is arranged inside the hydraulic cylinder casing, and the right end of the hydraulic cylinder casing is movable A power rod is connected, a cylinder cover is fixedly connected to the opening of the hydraulic cylinder shell, a left hydraulic oil valve is arranged on the left end of the cylinder cover, and a detection device is fixedly connected to the left side of the hydraulic cylinder shell. The upper end of the detection device is movably connected with a switch, and the lower end of the switch is fixedly connected with a main helical gear. The device can provide a good sealing environment for the detection device and improve the detection performance of the detection state through the cooperation of the closed door and the latex block. .
Owner:山东福阳液压科技有限公司 +1
Thread stop structure
The invention discloses a thread locking structure, which is used for locking a screw for connecting an upper connecting piece and a lower connecting piece together, and comprises a through hole formed in the upper connecting piece and a threaded hole formed in the lower connecting piece, a locking gasket is arranged between the through hole and a screw cap of the screw, a clamping groove is formed in the screw cap, and the threaded hole is arranged in the clamping groove. The locking gasket is provided with a bending part which can be clamped into the clamping groove; the locking gasket is provided with a positioning protrusion, the through hole is provided with a positioning groove for the positioning protrusion to be clamped in, or the locking gasket is provided with a positioning groove, and the through hole is provided with a positioning protrusion clamped in the positioning groove. The positioning protrusion is clamped into the positioning groove to achieve angular position fixation between the locking gasket and the upper connecting piece, and after the threads are tightened, the bent portion is clamped into the clamping groove, so that angular position fixation among the screw, the locking gasket and the upper connecting piece is achieved.
Owner:BEIJING XINGJI RONGYAO SPACE TECH CO LTD
Intelligent ore drawing device of ore leakage trolley
ActiveCN114590552APrevent large area accumulationAvoid secondary failureConveyorsControl devices for conveyorsProduction lineMining engineering
The invention relates to an intelligent ore drawing device of an ore leaking trolley. The ore drawing device is mainly composed of an intelligent ore drawing device module input control contactor of the ore leaking trolley, a belt ore overflowing sensor device, a belt slipping sensor device and a belt hopper ore overflowing sensor device 25. According to the belt hopper ore overflowing sensor device, when the hopper ore reaches the maximum limiting capacity, the module receives data, the vibration machine vibrates, ore loosening is conducted, and the hopper ore overflowing phenomenon is prevented. The stock bin liquid level sensor monitors and sets the operation time and the interval time of the vibration motor according to the actual condition of the moisture content of the iron ore concentrate powder, and indirect ore loosening can be achieved to avoid large-area ore accumulation. The belt deviation sensor device monitors the running condition of the conveying belt in real time, the function of automatic alarming and line stopping is achieved when deviation occurs, and maintainers are prompted that the conveying belt production line is abnormal and needs to be repaired, maintained and corrected. The belt ore overflowing sensor device monitors the operation condition of ores above the belt all the time, and automatically alarms and stops the line when the ores are accumulated, so that large-area accumulation of the ores is avoided, and the secondary fault that electrical elements are damaged due to overload operation of a motor is avoided.
Owner:NANJING MEISHAN METALLURGY DEV +1
Data transmission method and device, equipment and storage medium
PendingCN114785456AAvoid secondary failureRealize automatic recovery pushError prevention/detection by using return channelTransmission rate adaptationCurrent timeEngineering
The embodiment of the invention discloses a data transmission method and device, equipment and a storage medium, and the method comprises the steps: responding to the failure of first real-time data transmission, and storing the first real-time data; retransmitting the first real-time data according to a specific period; in response to successful retransmission of the first real-time data, determining a real-time transmission task according to a preset rate threshold; the real-time transmission task at least comprises transmission of second real-time data; the second real-time data is acquired at the current time point.
Owner:SHENZHEN SENSETIME TECH CO LTD
Servo intelligent power control circuit and servo intelligent power control method based on thyristor rectification
ActiveCN103023355BReduce feverAvoid secondary failureAc-dc conversionSilicon-controlled rectifierSignal processing circuits
The invention discloses a servo intelligent power control circuit and a servo intelligent power control method based on thyristor rectification. The control circuit comprises an MCU (microprogrammed control unit), a signal processing circuit, a sampling circuit, an ADC (analog-digital converter) conversion circuit, an alarm processing circuit and a thyristor triggering circuit, wherein the sampling circuit is used for acquiring alternating-current and direct-current bus voltage and current signals and providing the acquired signals for the signal processing circuit and the ADC conversion circuit; the signal processing circuit is used for reshaping and comparing the acquired signals and providing a natural phase change point of a corresponding-phase alternating-current bus for the MCU; and the MCU is used for processing the signals from the signal processing circuit and the ADC conversion circuit and controlling a thyristor array by the aid of the thyristor triggering circuit. The control circuit solves the technical problems that output voltage is non-adjustable as alternating-current and direct-current rectification portions adopt three-phase diode rectifiers, continuous powering up cannot be achieved as a thermistor is used for soft start, or secondary failure occurs easily as a high-power cement resistor is adopted.
Owner:GSK CNC EQUIP
Tool management system for preventing tools from missing
The invention relates to the field of substation tool placement, in particular to a tool management system for preventing tools from missing, the tool management system comprises a cabinet body placed in a substation, a plurality of tools is placed in the cabinet body, each tool is fixedly connected with a UWB positioning tag, and positioning base stations are arranged in the substation. The number of the positioning base stations is at least four, the positioning base stations are uniformly arranged around the cabinet body, the positioning base stations are connected with a position resolving server, the position resolving server is connected with each positioning base station, and the position resolving server is connected with an alarm device. According to the tool management system, the UWB positioning tags are fixed on the tools, and the UWB positioning tags are used for tracking and positioning the positions of the tools, so that the purpose of avoiding secondary faults of electrical equipment caused by the fact that maintenance personnel omit the tools on a working plane is achieved.
Owner:CHINA CREC RAILWAY ELECTRIFICATION BUREAU GRP +1
Management method, device, server and storage medium of transaction channel
ActiveCN110175830BImplement management methodsAvoid secondary failureFinancePayment architectureEngineeringFinancial transaction
The embodiment of the invention discloses a management method, device, server and storage medium of a transaction channel. The method includes: if there is a normal transaction channel whose request success rate of the transaction request does not meet the preset requirements, setting the normal transaction channel as an abnormal transaction channel, and reallocating the pending transaction requests corresponding to the abnormal transaction channel Trading channel: Wait for a preset time, and determine whether the maintenance of the abnormal trading channel is completed according to at least two levels of success rate discrimination methods; if the maintenance of the abnormal trading channel is completed, set the abnormal trading channel as a normal trading channel. The technical solution provided by the embodiment of the present invention solves the problem of untimely switching of available trading channels in the prior art or prone to secondary failures after switching, so as to realize accurate switching of trading channel states during the process of executing transaction requests, Improve system stability and availability.
Owner:SHENZHEN LEXIN SOFTWARE TECH CO LTD
A fault diagnosis method for cascaded h-bridge converter based on voltage residual
ActiveCN110376471BRealize online real-time monitoringImprove versatilityCircuit interrupters testingConvertersControl signal
The invention discloses a cascaded H-bridge converter fault diagnosis method based on voltage residual, which comprises the following steps: Step 1: According to the system switch control signal and the current polarity of the AC side, obtain the switch under normal conditions and different switch tube faults Function; Step 2: Obtain the input voltage calculation model of the single-phase cascaded H-bridge converter and the state estimation model of the corresponding module; Step 3: Obtain the theoretical analysis value of the voltage residual under different faults; Step 4: According to the voltage residual Design two types of counters to obtain the maximum value of the theoretical analysis value to locate the fault module, and further combine the switch signal to determine the fault switch tube; the present invention can be integrated into the controller, with good real-time performance, and realizes the single-phase cascaded H-bridge converter fault module and its Real-time diagnostics for open fault switches.
Owner:SOUTHWEST JIAOTONG UNIV
Service chain remapping method, electronic equipment and storage medium
ActiveCN113067720AReduce consumptionAvoid secondary failureData switching networksResource poolComputer architecture
The embodiment of the invention provides a service chain remapping method, electronic equipment and a storage medium. The method comprises the following steps: determining a network service corresponding to a fault service chain; acquiring network resources of a communication network for providing communication service for the network service to generate a network resource pool; determining a fault network resource corresponding to the fault service chain, and deleting the fault network resource from the network resource pool to update the network resource pool; and generating a target mapping scheme for the network service according to the network resource pool, and deploying a service chain according to the target mapping scheme. The electronic equipment comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor to execute the service chain remapping method. The non-transitory computer-readable storage medium stores computer instructions for causing a computer to execute the service chain remapping method.
Owner:BEIJING UNIV OF POSTS & TELECOMM
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