Product
Eureka
For R&D, Eureka makes reading and utilizing patents & technical documents easy.
Eureka AIR
Designed for self-driven R&D workflows. Generate viable solutions, solve complex R&D challenges, empower your innovation with AI.
Eureka Materials
Designed for material experts only. Revolutionize your material R&D, from search, analyze, to developing new materials.
Feature
TechResearch
Generate reliable direction feasibility study reports for your R&D in just a few steps.
TechSeek
Discover and master advanced knowledge NOW. Basics, ideas, possibilities, all at once.
TechMind
As an expert in R&D Theories, TechMind can generates customized viable solutions instantly.
TechRisk
Analyze your overall solution with one click, know your potential R&D risks in advance.
TechMonitor
Get weekly tech updates, stay abreast of the latest tech innovations and key insights.
Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
177results about How to "Avoid false start" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Vehicle-mounted sterilization system
InactiveCN101716356AAccurate detectionEnsure safetyLavatory sanitoryRadiationEmbedded systemCar door
The invention provides a vehicle-mounted sterilization system, belongs to the technical field of vehicle sterilization, and solves the problems that the traditional vehicle sterilization mode is time and labour-consuming has high sterilization cost. The vehicle-mounted sterilization system comprises a central processing unit, a power supply, an inching switch, a sterilizing lamp, a passenger detection device and a vehicle door state inductive switch, wherein the sterilizing lamp is connected with the central processing unit; the power supply supplies power to the sterilizing lamp and the central processing unit; the passenger detection device and the vehicle door state inductive switch are connected with the central processing unit; the passenger detection device is used for detecting whether no passenger is in the vehicle or not and inputting the corresponding signal to the central processing unit; the vehicle door state inductive switch is used for feeding back a vehicle door state to the central processing unit; and when the passenger detection device detects that no passenger is in the vehicle and the vehicle door state inductive switch senses that the vehicle door is closed, the central processing unit controls the sterilizing lamp to start sterilizing. The vehicle-mounted sterilization system of the invention has the advantages of safe and convenient use, good sterilization effect and the like.
Owner:ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1
Charge control system and control method of plug-in hybrid power bus
ActiveCN104943558AConvenient charging operationAvoid false startElectric devicesVehicular energy storageContactorControl mode
The invention discloses a charge control system of a plug-in hybrid power bus. A remote monitoring terminal, a whole bus controller VMS and a combination instrument can be awakened by a charging-awakening power supply, and the combination instrument can awaken a bus body control module. The whole bus controller VMS controls powering on and off of a battery management system (BMS) through a BMS power supply relay. The BMS controls switching on and off of a charging contactor. The whole bus controller VMS is further connected with a charging cabin door sensor. After a charging gun is plugged, a 24V low-voltage power supply of an international charging gun is utilized to automatically activate the combination instrument, the whole bus controller VMS and the remote monitoring terminal without manual power supply switching for activation, and charging operation steps are simple. After the charging gun is inserted, the combination instrument, the bus body control module and a whole bus controller are automatically switched to be in a charging control mode, an engine starting signal, a gear signal and an accelerator signal are shielded, mistaken bus startup is prevented during charging, and safety and reliability are high.
Owner:ZHONGTONG BUS HLDG
A payment control method and device, a terminal and a readable storage medium
The invention provides a payment control method and device, a terminal and a readable storage medium. The payment control method is applied to the terminal and comprises the steps of: when the terminal is in a screen-off state, detecting a current scene where the terminal is in; judging whether the current scene where the terminal is in corresponds to a preset scene; if the scene where the terminal is in currently accords with the preset scene, controlling the terminal to unlock the screen and start a payment interface of a preset application. According to the invention, a payment process canbe simplified and payment experience of users can be improved.
Owner:MEIZU TECH CO LTD
Smart home security system
InactiveCN105976559AEasy to handleQuick responseComputer controlIndividual entry/exit registersSmoke detectorsPhase detector
The invention discloses a smart home security system, which comprises an emergency lamp, an alarm host, an alarm light, a loudspeaker, a center control host, a center control display screen, a monitoring module, a camera, an infrared detector, a smoke detector, a gas detector, a gas valve, a rainwater detector, a curtain motor, a window pusher, an entrance guard module, an emergency button, door magnetic detectors, curtain detectors, a remote controller, a fixed telephone, a mobile phone terminal and an alarm center. The beneficial effects are that the smart home security system is mainly formed by three modules, that is, the entrance guard module, the alarm module and the monitoring module; the entrance guard module is provided with the emergency button, which can lock each door and window and disconnect a power source under a dangerous condition, thereby improving processing capacity of the system under emergency; and the door magnetic detectors and the curtain detectors can be arranged in the corner of each door and each window, and can motivate the alarm module to alert a house owner when monitoring a stranger comes in.
Owner:四川宏图四方智能科技有限公司
Method for shutting down false start-up application program and mobile terminal
ActiveCN104850443AImprove user experienceAvoid false startProgram loading/initiatingTraffic volumeFalse start
The invention discloses a method for shutting down a false start-up application program and a mobile terminal. The method includes: after the mobile terminal is awakened, acquiring a new start-up application program; when ambient light intensity of the mobile terminal and / or the distance between a user and the mobile terminal meets a preset condition, the mobile terminal taking the new start-up application program as the false start-up application program to be closed. The new start-up application program is judged to be the false start-up application program or not according to the ambient light intensity and the distance between the user and the mobile terminal, the false start-up application program is closed, false start up of the application program can be accurately prevented, consumption of main memory resources, power and data traffic of the mobile terminal is lowered, and user experience is improved.
Owner:NUBIA TECHNOLOGY CO LTD
Motor restart controller and control method of motor restart controller
ActiveCN108448946AAvoid false startGuaranteed uptimeStarter detailsDynamo-electric converter controlFrequency changerVariable-frequency drive
The invention relates to a motor restart controller and a control method of the motor restart controller. The motor restart controller is used for controlling the restart of the motor through a frequency converter. A backup power supply module is electrically connected with a logic control module and a reset module. The logic control module is used for judging whether the operation signal normallyopen contact of the frequency converter is disconnected when the instantaneous sag amplitude of the power supply voltage is detected to reach the preset amplitude threshold and blocking the start instruction of the frequency converter and detecting whether the power supply voltage is restored if the judgment result is yes; and if the power supply voltage is not restored when the preset time threshold is up, the connection between the backup power supply module and the reset module is disconnected and the start instruction of the frequency converter is relieved, or the backup power supply module is controlled to supply power to the reset module so as to control the frequency converter to reset. The controller can quickly respond and accurately judge whether shutdown of the frequency converter is really caused by instantaneous "power failure" of the power supply so that false starting of the frequency converter caused by misjudgment can be prevented, continuous production and operationcan be guaranteed and the safety accident can be reduced.
Owner:SHENZHEN BEITON CONTROL TECH
Key control device for click pad
ActiveCN103545125AAvoid false startDoes not affect appearanceEmergency actuatorsOperation facilitationKey pressingEngineering
Owner:WISTRON CORP
Control method and device for two-stage supercharged engine
ActiveCN108798931AAvoid false startReasonable managementElectrical controlInternal combustion piston enginesElectricityDriving mode
The invention discloses a control method for a two-stage supercharged engine. The control method is suitable for controlling the engine provided with an electric supercharger and a turbosuperchager; the control method comprises the steps that when a vehicle quickly accelerates, whether starting conditions of the electric supercharger are met or not is judged, and the starting conditions comprise that the rotating speed of the engine is smaller than a start-up rotary speed threshold value, the vehicle speed of a vehicle is smaller than a start-up vehicle speed threshold value, the remaining electricity of a battery of the vehicle is larger than a start-up electricity threshold value, the temperature of a cooling system of the electric supercharger is smaller than a starting system temperature threshold value, the environment temperature is smaller than a start-up environment temperature threshold value, and a driving pattern supports the electric supercharging function; if the vehicle meets the starting conditions, the electric supercharger and the turbosuperchager are controlled to supercharge the engine; and if the vehicle does not meet the starting conditions, the turbosuperchager is controlled to supercharge the engine. By means of the control method, the electric supercharger is determined to be started according to the vehicle running state, and the vehicle is protected.
Owner:芜湖埃科泰克动力总成有限公司
High resistance grounding detection system, device and method for small current grounding system
PendingCN108548986AEliminate the impact of discriminationReal reaction to feverElectrical testingInformation technology support systemHigh resistanceVoltage vector
The invention discloses high resistance grounding detection system, device and method for a small current grounding system. The system comprises a grounding wire selecting device, a flexible voltage source and a boosting transformer, wherein the grounding wire selecting device is connected with the flexible voltage source, a high voltage side of the boosting transformer is connected between a neutral point of the system and the ground, and a low voltage side of the boosting transformer is connected with the flexible voltage source; and the flexible voltage source is used for receiving commandsissued by the grounding wire selecting device and emitting an appointed voltage vector to the low voltage side of the boosting transformer. The method comprises the following steps: when a groundingfault does not occur, injecting a non-power frequency voltage through the neutral point, collecting a bus zero sequence voltage and a zero sequence current of each branched circuit, and calculating the zero sequence capacitive reactance of each branched circuit; and when a grounding fault occurs, calculating power integration and a resistance value of a grounding point according to the zero sequence capacitive reactance of each branched circuit, a collected bus three-phase voltage, the zero sequence voltage and the zero sequence current of each branched circuit, and selecting a grounding wire.The invention further discloses a corresponding high resistance grounding detection device. According to the system, the device and the method, the high resistance grounding recognition capacity of the small current grounding system is improved.
Owner:NR ELECTRIC CO LTD +1
Chip awakening method and circuit
ActiveCN108173539AAvoid false triggersAvoid false startElectronic switchingBandpass filteringEngineering
The invention provides a chip awakening method and circuit. The circuit comprises a bandpass dynamic amplifier, a pulse width comparator and an edge counter that are connected in sequence, wherein thebandpass dynamic amplifier comprises a bandpass filter and an amplification tube, and the bandpass filter is coupled to a gate and a source of the amplification tube separately. The method comprisesthe steps of detecting whether the chip awakening circuit meets preset conditions, wherein the preset conditions are as follows: an input signal of the bandpass dynamic amplifier is a differential lowfrequency signal and a differential mode level is within a preset level range; an ascending edge and a descending edge of a pulse signal output by the pulse width comparator meet a preset time interval; and the number of pulses recorded by the edge counter reaches a preset threshold; if all the preset conditions are met, outputting an awakening signal. Through adoption of the chip awakening method and circuit, the chip awakening circuit avoids false triggering, so that a battery monitor chip avoids false tripping, and the service life of the battery is prolonged.
Owner:DATANG NXP SEMICON CO LTD
Intelligent parking lock
The invention discloses an intelligent parking lock. Driving in of a vehicle is induced through an internally-arranged pressure sensor, a motor drives a locking plate to lift through a driving system and then the locking plate withstands a vehicle chassis to prevent the vehicle from leaving a parking space without permission, after a vehicle owner pays the bill or is authorized, the locking plate of the parking lock is put down, the vehicle can leave the parking space, and the purpose that unattended operation is conducted to manage a parking space is achieved; and the parking lock can be connected with the internet to search a parking space and pay the bill, so that the purposes that unattended operation is conducted on the parking space and fee is charged are achieved. In addition, elastic bodies are installed on the two sides of a worm shaft to protect the parking lock from being impacted by the vehicle when the parking lock is locked up, that is, a worm and gear system is prevented from being damaged by the vehicle so that the whole parking lock can be used permanently, and the intelligent parking lock further achieves a waterproof function.
Owner:李志宏
Method and device for controlling treadmill by voice
InactiveCN108062949AIncrease success rateAvoid false startSpeech recognitionMovement coordination devicesSound sourcesSpeech recognition
The invention discloses a method and device for controlling a treadmill by voice. Sound source data is received by a voice input module and is inputted into a voice recognition system, the voice recognition system performs speech recognition, and after the recognition is completed, a recognition result is transmitted to a processing module. The processing module performs instruction extraction onthe recognition result. If a wake-up instruction is extracted, a voiceprint extraction module extracts voiceprint information in the sound source data and transmits the wake-up instruction to the execution module to execute the instruction. If the wake-up instruction not is extracted, the process returns to the voice input module. According to the method and device, noise can be effectively suppressed, useful voice signals can be enhanced, when a user uses the treadmill, the success rate of voice control is improved, and the use experience of the user is good.
Owner:GUANGZHOU LANGO ELECTRONICS TECH CO LTD
Device and method for improving rate of mechanical penetration of directional deflecting section
The invention relates to a directional deflecting acceleration device and a using method thereof. The directional deflecting acceleration device comprises a torque regulating short section, a clamping arm short section and a torque eliminating short section. An upper transmission piece and a lower transmission piece of the torque regulating short section achieve synchronous connection and disconnection through a torque locking piece. The directional deflecting acceleration device is installed above a drill collar in a dynamic drill assembly. The pitching pressure-out is adopted to start the torque regulating short joint, regulate the torque locking piece and cut the torque transmitting from a rotary table to a drill bit. Meanwhile, a bi-directional thrust ball bearing combination continues to keep the drill pressure being transmitted to the drill bit. Pumping pressure is increased, the clamping arm short joint extends outwards out of a clamping arm to clamp the well wall, the torque eliminating short joint is matched to enable the clamping arm short joint and the drill assembly below the clamping arm short joint to relatively fix the well wall, and well inclination azimuth is kept unchangeable. The device is compact in structure, convenient to operate, and capable of thoroughly solving the problem that the rate of mechanical penetration of a directional deflecting section is low.
Owner:SOUTHWEST PETROLEUM UNIV
Electrostatic discharge protecting device of high-voltage cushion
ActiveCN101533830AAvoid false startSemiconductor/solid-state device detailsSolid-state devicesLow voltageElectrostatic discharge protection
The invention provides an electrostatic discharge protecting device of a high-voltage cushion, which comprises a high-voltage NMOS transistor that is connected between the high-voltage cushion and a low-voltage end and is provided with a parasitic element between source-drain electrodes thereof, and when voltage of a trigger on the high-voltage cushion reaches a critical value, the parasitic element is conducted so as to release the energy which is generated by the electrostatic discharge of the high-voltage cushion to the low-voltage end.
Owner:ELAN MICROELECTRONICS CORPORATION
Unmanned aerial vehicle control system
ActiveCN105278537ASimple and reliable structureReduce volumeAttitude controlPosition/course control in three dimensionsFlight vehicleUnmanned spacecraft
The invention discloses an unmanned aerial vehicle control system comprising a flight controller and a flame-out protection line. The flame-out protection line is directly connected with the engine of an unmanned aerial vehicle and used for limiting starting of the engine of the unmanned aerial vehicle. The flight controller is installed on the unmanned aerial vehicle and used for controlling the unmanned aerial vehicle. The flight controller is connected with the unmanned aerial vehicle via a left and right wing control device, an air door and throttle control device and a start and flame-out line and used for controlling the engine of the unmanned aerial vehicle and the flight attitude of the unmanned aerial vehicle. Take-off, landing and flight speed of the unmanned aerial vehicle can be intelligently controlled, and the unmanned aerial vehicle control system can also record the operation process of the unmanned aerial vehicle in real time and monitor obstacles on the way apart from the given tasks so that the unmanned aerial vehicle control system has great effect in monitoring and tracing the flight process of the aerial vehicle.
Owner:XIANGYANG HONGWEI AIRCRAFT
Heat dissipation method and device for power battery in vehicle, storage medium and processor
PendingCN111162343AImprove securityImprove charge and discharge performanceSecondary cellsVehicular energy storagePower batteryDriver/operator
The invention provides a heat dissipation method and device for a power battery in a vehicle, a storage medium and a processor. The power battery is located in a battery bin, and the method comprisesthe steps of detecting whether the power battery is in a preset working state or not; under the condition that the power battery is in a preset working state, detecting the temperature in the batterybin; determining a PWM wave with a predetermined duty ratio according to the temperature of the battery bin; adopting the PWM wave to control a fan to work, wherein the fan is located in the battery bin. According to the method, the fan is controlled to work through the PWM wave, so that the problem of worse safety caused by the fact that a driver controls a switch of the fan is avoided. Accordingto the method, the duty ratio of the PWM wave is adjusted according to the temperature in the power battery bin, and then the rotating speed of the fan is controlled according to the duty ratio of the PWM wave, namely the rotating speed of the fan is adjusted according to the temperature of the battery bin, so that the heat dissipation efficiency of the power battery bin is improved, the energy consumption is reduced, the charge-discharge performance of the battery is improved, the driving range of the vehicle is increased, and the accident risk of the vehicle is reduced.
Owner:成都广通汽车有限公司 +1
Operation control method and device applied to inverter feedback device and medium
The invention relates to an operation control method and device applied to an inverter feedback device and a medium and provides an intelligent operation control method applied to the inverter feedback device. The operation control method applied to the inverter feedback device comprises the steps of tracking an alternating current side voltage of an alternating current power grid of a traction system in real time; and when abnormal fluctuation of the alternating current side voltage is monitored, adjusting a starting threshold value of the inverter feedback device according to a fluctuation situation in real time; and therefore, the effect of network voltage fluctuation on the inverter device is avoided, and the false acting situation of the feedback device is reduced. According to the operation control method applied to the inverter feedback device, the controlling and adjusting of the starting voltage threshold value of the inverter feedback device can be realized on the basis of network voltage change self-adaption; and moreover, without changing an original hardware circuit, the operation control method applied to the inverter feedback device has the advantages of simple realization method, low desired cost and high real-time performance.
Owner:XUJI GRP +2
Machine core of electric pencil sharpening machine
The invention provides a machine core of an electric pencil sharpening machine, and belongs to the technical field of machinery. The problems that existing electric pencil sharpening machines are low in safety and prone to being mistakenly started when machine covers are taken down are solved. The machine core comprises a shell with the upper end open, a pencil holding frame arranged in the shell, a sharpening assembly located on one side of the pencil holding frame and a motor capable of controlling the sharpening assembly to work. The upper end of the shell is connected with a protection cover, a mounting cavity is formed in the protection cover, and a pencil inserting hole communicating with the mounting cavity is formed in the bottom of the protection cover. The pencil inserting hole right faces the pencil holding frame. A first microswitch is arranged in the position, close to the pencil inserting hole, in the mounting cavity, and the first microswitch can be triggered when a pencil is inserted into the pencil inserting hole. A protection hole and a connecting hole right facing the pencil inserting hole are formed in the upper end of the protection cover in a penetrating mode. A second microswitch is further fixed in the mounting cavity, and a trigger part of the second microswitch is opposite to the lower port of the protection hole. The machine core of the electric pencil sharpening machine has the advantages of being high in safety, capable of effectively preventing mistaken start, and the like.
Owner:SUNWOOD HLDG GROUP
In-orbit programming and reloading method for large-scale complex structure software
ActiveCN107220097AAvoid false startPrevent wrong programmingProgram controlMemory systemsSatelliteSoftware programming
The invention discloses an in-orbit programming and reloading method for large-scale complex structure software. Software programming mirror image document generation and ROM programming of a disperse structure when a computer dynamically runs are achieved by running ROM programming function software in a background program through an RAM in an in-orbit programming mode, a programming mirror image document consists of uncompressing and secondary trackback codes and multiple dispersedly stored compression codes, a redundant backup programming mode is adopted in the software programming process, backup programs are sequentially programmed according to the remote control noting number, and the mirror image documents before and after programming are verified to confirm programming correctness. After the computer is re-electrified or reset, the uncompressing and secondary trackback codes firstly run to decompress all compressing codes into an RAM space, and the software is started for running after verification is correct. The implementing process is reliable and safe, the code noting amount is small, and the in-orbit programming and reloading method can be used for software programming of a satellite during long-term in-orbit operation.
Owner:SHANGHAI AEROSPACE CONTROL TECH INST
Voltage feed-forward control method suitable for parallel connection of a plurality of stationary synchronous compensators
ActiveCN105119306ASuppression of resonance phenomenaNo lossFlexible AC transmissionReactive power adjustment/elimination/compensationCompensation pointEngineering
The invention relates to a voltage feed-forward control method suitable for parallel connection of a plurality of stationary synchronous compensators. The method includes the following steps of (1) determination of number of the stationary synchronous compensators: the number N of the stationary synchronous compensators in operation is determined by detecting the reactive component Iq of a system; (2) net-side impedance detection: the net-side impedance Zg is detected by means of an active injection harmonic method; and (3) feed-forward signal generation: the final feed-forward voltage Uff of the stationary synchronous compensators is obtained based on the net-side impedance Zg detected in the step (2), compensation point voltage Upcc, and current Ipcc. Compared with the prior art, the voltage feed-forward control method has the advantages of wide application, good robustness, and low loss.
Owner:山东万海电气有限公司
Boarding ladder system of large type excavator
PendingCN108193734AReliable structureEnsure safetySoil-shifting machines/dredgersLaddersEngineeringElectrical and Electronics engineering
The invention discloses a boarding ladder system of a large type excavator. The boarding ladder system comprises a ladder frame, a ladder body, a cord pulling device and a locking device. The ladder frame is hinged to a hanging cabin of the excavator; the ladder body is slidably connected in the ladder frame; the cord pulling device is connected with the ladder body for pulling the ladder body toslide up and down in the ladder frame, and after the ladder body is contracted upwards by the predetermined length in the ladder frame, the cord pulling device drives the ladder frame to move, so thatthe ladder frame is contracted in accommodating space at the hanging cabin; and when the ladder frame is contracted in the accommodating space at the hanging cabin, the locking device is inserted into the ladder body to fix the ladder body. The boarding ladder system of the large type excavator can be controlled to be placed down by a driver in a cab after stop and put away before working in thecab.
Owner:XCMG EXCAVATOR MACHINERY
Mousetrap
The invention discloses a mousetrap. A triggering mechanism of the mousetrap comprises a support rod capable of moving up and down relative to a front side plate. A box body is provided with a support locking mechanism which can rotate relative to the box body and support the support rod, a transmission rod is hinged to the front side plate and provided with a clamping position which can be clamped with a lock-clamping part on the support locking mechanism, the box body is further provided with a motor, an inhaul cable which can pull the transmission rod to rotate downward is arranged between an output shaft of the motor and the transmission rod, a reset spring for the resetting of the transmission rod by rotating upward is arranged between the transmission rod and the box body, a top cover is provided with a tread plate which moves downward after being trampled by a mouse, the tread plate and the top cover are respectively provided with conductive contact pieces which can contact to make the motor rotate with power when the thread plate moves downward, a return spring is further arranged between the tread plate and the top cover to separate the conductive contact pieces on the tread plate and on the top cover. The mousetrap has the advantages of being simple in structure, sensitive in action and good in mouse catching effect.
Owner:方鹏羽
Transformer protection current break variable starting method and transformer protection device
ActiveCN110768210AReliable startAvoid false startEmergency protective circuit arrangementsCurrent transducerTransformer
The invention relates to a transformer protection current break variable starting method and a transformer protection device. The method comprises the steps of: carrying out the determination of a current break variable of a transformer and the zero-sequence voltage, the negative-sequence voltage, the zero-sequence voltage break variable and the negative-sequence voltage break variable of the corresponding side of the transformer when a current sensor at one side of the transformer has a disconnection fault; when the current break variable of a certain phase of the high-voltage side or the medium-voltage side of the transformer is larger than a current break variable threshold value and the zero-sequence voltage, the negative-sequence voltage, the zero-sequence voltage break variable or the negative-sequence voltage break variable of the corresponding side of the transformer is larger than a voltage threshold value, controlling a starting element to be started; and when the current break variable of a certain phase at the low-voltage side of the transformer is greater than the current break variable threshold value and the negative-sequence voltage or the negative-sequence voltagebreak variable at the corresponding side of the transformer is greater than the voltage threshold value, controlling the starting element to start. According to the invention, even if the current sensor on one side of the transformer has a disconnection fault, the current break variable starting element can still be reliably started.
Owner:河南许继继保电气自动化有限公司 +3
Lamp strip press-fit device
Owner:博讯光电科技(合肥)有限公司
Power distribution network single-phase disconnection fault protection method and system thereof
PendingCN113848429AEasy to implementAvoid false startFault locationInformation technology support systemThree-phase electric powerSingle phase
The invention discloses a power distribution network single-phase disconnection fault protection method and a system thereof. The method comprises the following steps: acquiring three-phase current of each outgoing line of a transformer substation; extracting a fundamental wave vector of the three-phase current by using FFT; calculating the break variable of the three-phase current amplitude by using the fundamental wave vector; if the break variables of the three-phase current amplitudes are all smaller than 0, starting protection; after protection is started, sequencing the absolute values of the three-phase current amplitude break variables, and respectively calculating the ratio lambda of the maximum phase of the absolute values of the three-phase current amplitude break variables to the load current before the fault and the phase difference beta of the minimum absolute values of the break variables and the intermediate phase current; and judging whether the line has a broken line high-resistance fault or not according to lambda and beta, when conditions are met, determining that the fault occurs in the line, otherwise, determining that the fault does not occur in the line, and when it is determined that the fault occurs in the line, performing fault protection. The method can be fused with in-station current protection to realize quick isolation of a broken line fault, and the broken line fault can be isolated in a minimum range through a time range matching method.
Owner:STATE GRID SHAANXI ELECTRIC POWER RES INST +1
Automatic fire extinguishing device integrating functions of fire detection and fire extinguishment
ActiveCN102225227AAvoid false alarmsAvoid false startFire rescueControl systemAutomatic fire suppression
The invention relates to an automatic fire extinguishing device integrating functions of fire detection and fire extinguishment. Since the existing automatic fire extinguishing device has to be equipped with a special electronic fire alarm control system, misoperation or failure of the fire extinguishing device can be caused easily by environmental temperature and humidity, dust, electromagnetismand other factors, and maintenance cost is high. The invention aims at developing an automatic fire extinguishing device integrating the functions of fire detection and fire extinguishment. The automatic fire extinguishing device is structurally characterized in that a fire extinguishing opening mechanism comprises a hot-melt sealing piece (3), a joint (14) with a heating chemical agent (4) and aconnecting part which are connected with one end of a fire extinguishing agent conveying pipe (5); and a fire detection opening mechanism (17) is connected with each fire extinguishing agent spout onthe fire extinguishing agent conveying pipe (5). The automatic fire extinguishing device has the advantages of omitting a plurality of electronic detection control devices, simplifying the structure of a fire extinguishing system, lowering cost, reducing the using space, achieving the capability of conveying different types of fire extinguishing media, such as gas, liquid, powder and the like, expanding the application range of the fire extinguishing media and achieving broader application places.
Owner:SHAANXI LUFANG SAFETY TECH
Pipeline system of gas water heater and control method
PendingCN112033007APrevent initiating trafficAvoid false startFluid heatersMechanical apparatusWater useWater flow
The invention discloses a pipeline system of a gas water heater and a control method. The system comprises a gas water heater body, a water return pump, a temperature sensor, a water return branch pipe and a one-way valve arranged on the water return branch pipe, and the water return pump and the temperature sensor are both arranged on a water inlet pipeline of the gas water heater body; the waterreturn branch pipe is used for being connected with an external hot water pipe and an external cold water pipe of the gas water heater body to form a water return pipeline; the pipeline system further comprises a water flow sensor, a pipeline control assembly and a controller; the water flow sensor is arranged at the cold water end of an external water point and used for detecting the water flowof the cold water end of the external water point; the pipeline control assembly is arranged on the water return branch pipe, and the pipeline control assembly is used for preventing the condition that the water flow in the water return branch pipe reaches the starting flow of the gas water heater body due to the fact that water is used at the cold water end of the external water using point; andthe controller is electrically connected with the water flow sensor and the pipeline control assembly.
Owner:VATTI CORP LTD
Drainage pump control method, device and equipment and storage medium
ActiveCN112350630AAvoid the problem of heating or even damageAvoid false startElectronic commutation motor controlElectric motor controlWater volumeElectric machinery
The invention provides a drainage pump control method, a device and equipment and a storage medium. The method comprises the steps that controlling a motor of a drainage pump to rotate by a first preset duration in the first direction; collecting motor operation parameters within a first preset time length; determining whether the water quantity in a drainage pipe is greater than a preset water quantity or not according to the motor operation parameters; and controlling the motor to drive the drainage pump to start draining according to the water volume greater than the preset water volume. Before drainage, whether the water amount in the current drainage pipe is larger than the preset water amount or not is judged according to the motor operation parameters. And only when the water amountis determined to be greater than the preset water amount, drainage is started, and the problems of motor temperature rise or noise caused by drainage under the condition of small water amount are avoided. And the water volume condition when the motor operates in different directions is detected, so that the situation that the one-way blockage of the drainage pump is misjudged that the water volume is greater than the preset water volume is effectively avoided, and the water volume detection accuracy is improved. The problem that the motor is heated and even damaged due to false starting underthe one-way blocking condition is avoided, and noise in the drainage process is lowered.
Owner:WUXI LITTLE SWAN ELECTRIC CO LTD
Intelligent control scheme for solving morning-evening frequent starting of photovoltaic grid-connected inverter
ActiveCN104124698AAvoid false startImprove stabilitySingle network parallel feeding arrangementsPhotovoltaic energy generationGrid connected inverterPower grid
The invention relates to an intelligent control scheme for solving morning-evening frequent starting of a photovoltaic grid-connected inverter. An auxiliary power supply unit, a control assembly and a startup delay starting unit are arranged. The startup delay starting unit is connected to the control assembly and a direct-current power supply unit; the auxiliary power supply unit is connected to the control assembly and the direct-current power supply unit; and the control assembly is also connected to the direct-current power supply unit and a power grid. The startup delay starting unit determines the output voltage of the direct-current power supply unit; when the output voltage is lower than a predetermined first voltage value, the electric energy of the direct-current power supply unit is consumed, thereby avoiding starting of the auxiliary power supply unit; and when the output voltage is higher than the predetermined first voltage value, the startup delay starting unit stops consumption of the electric energy of the direct-current power supply unit and the control assembly maintains the starting state of the auxiliary power supply unit. With the control circuit, when the energy outputted by the direct-current power supply unit is deficient, wrong starting of the auxiliary power supply unit can be avoided by the delay starting device, thereby improving the system stability.
Owner:HUIZHOU TEN SOURCES SOLAR ELECTRICITY
Control method of zero cold water gas water heater and zero cold water gas water heater
PendingCN110806012AAvoid false startGuaranteed uptimeFluid heatersWater flowEnvironmental engineering
The invention discloses a control method of a zero cold water gas water heater. The control method is used for preventing incorrect starting of the gas water heater and is implemented according to thefollowing specific steps: S1, collecting the water inlet pressure P<inflow water> of a water inlet of the gas water heater in real time; S2, matching the water inlet pressure P<inflow water> in the step S1 with the preset starting flow of the gas water heater and calculating the starting flow V<starting> under the current water inlet pressure; and S3, collecting the water flow V<hot water> of a main water pipe of the gas water heater in real time and determining whether the zero cold water gas water heater is started or not according to the relation between the water flow V<hot water> and thestarting flow V<starting> in the step S2. The invention further discloses the gas water heater. Through the control method of the zero cold water gas water heater, the water inlet pressure is matchedwith the suitable starting flow, and the problem of incorrect starting of the gas water heater is solved.
Owner:VATTI CORP LTD
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com