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185results about How to "Achieve double protection" patented technology
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Method and system for identifying faked identity by preventing faked recordings based on voiceprint and voice
InactiveCN102708867AReduce speech lengthEasy to useSpeech recognitionUser identifierSpeech identification
The invention discloses a method and a system for identifying a faked identity by preventing faked recordings based on voiceprint and voice. The method comprises the following steps: building a voiceprint model and a voice model for a user according to a voice read by the user of a fixed text with a user ID, and storing the fixed text with the user ID as well as the voiceprint model and the voice model; generating an alerting text; acquiring the voice of a to-be-identified person when the to-be-identified person reads the alerting text; identifying the acquired voice of the to-be-identified person and the stored the voiceprint model of the user, and identifying the voice of the to-be-identified person according to the stored voice model, if both the voiceprint identification and the voice identification are successfully, the identity of the to-be-identified person is accepted, and otherwise, the identity of the to-be-identified person is not accepted. According to the method provided by the invention, the method using the fixed text with the user ID and a random text are adopted, so that the required voice length for the voiceprint modeling and the voiceprint verification are greatly reduced on the premise of guaranteeing the identification performances, thereby facilitating the use of the user.
Owner:BEIJING ZHENGYING TECH
Speed regulation and control system for lifting mechanism of tower crane
InactiveCN101780929AEasy to operateImprove operational efficiencyWinding mechanismsFrequency changerPower factor
The invention discloses a speed regulation and control system for a lifting mechanism of a tower crane. The lifting mechanism of the tower crane is controlled by a PLC through a frequency converter; the switching value of each shift during the ascending and descending of the tower crane is input into the PLC; the output of the PLC is connected with the frequency converter; the output of the frequency converter is connected with an ascending motor; and the PLC program design completes the logic operation of a given signal and a peripheral signal of the ascending frequency converter, the control of a brake, the logic judgment and alarm of various fault signals. An electrical towage system of the tower crane is subjected to technical transformation by using advanced PLC frequency conversion and speed regulation technology, so that the lifting mechanism of the crane realizes stable operation, enhances the operating efficiency, improves overload operation, eliminates starting impact and braking impact, reduces electric maintenance, reduces power consumption, and improves power factors. Simultaneously, the lifting mechanism has the advantages of over-current protection, over-voltage protection, under-voltage protection and input phase-lacking protection, and over-temperature protection, overload protection and over-speed protection of the frequency converter, overheat protection of a brake unit, an I / O fault protection, and motor fault protection and the like.
Owner:抚顺永茂建筑机械有限公司
Unlocking method, unlocking device and terminal equipment
InactiveCN106326718AAchieve double protectionImprove securityDigital data authenticationPasswordTerminal equipment
The invention discloses an unlocking method, an unlocking device and terminal equipment. The unlocking method comprises the following steps of presetting an unlocking picture and an unlocking password; displaying at least two pictures on a screen locking interface in a preset mode; receiving the unlocking picture selected by a user from at least two pictures; judging whether the selected unlocking picture is identical with the preset unlocking picture or not; displaying an unlocking password input interface; acquiring a to-be-verified unlocking password inputted by the user on the unlocking password input interface; judging whether the to-be-verified unlocking password is identical with the preset unlocking password or not; when the unlocking picture selected by the user is the preset unlocking picture, and the to-be-verified unlocking password is identical with the preset unlocking password, performing unlocking operation. According to the unlocking method provided by the invention, by identifying the operation of the preset unlocking picture and the preset unlocking password in sequence, the unlocking operation needs to be performed under the condition that the preset unlocking picture and the preset unlocking password are simultaneously operated, so that double protection is realized, and the safety of unlocking is improved.
Owner:MEIZU TECH CO LTD
Leakage protector circuit for electric water heater
InactiveCN1433116AFor security purposesAchieve double protectionEmergency protective arrangements for automatic disconnectionComparators circuitsElectricity
A leakage protector circuit for electric water heater is used in leakage protection in case of ineffective earthed ground wire. It consists of power polarity detecting and converting circuit, polarity conversion self-locking circuit, leakage protecting relay, leakage detecting comparator circuit and protection executing circuit. The electric supply is input to the leakage protector circuit from the power polarity detecting circuit and made to pass through the said circuits connected successively before being fed to electric water heater. In case of ineffective earthed ground wire, the presentinvention can result in safeguard effect.
Owner:SAKURA BATH & KITCHEN PRODS CHINA
Cloud storage data confidentiality protection method
ActiveCN110213354AIncrease the difficulty of decipheringImprove confidentialityDigital data protectionTransmissionData fileCloud storage
The invention discloses a cloud storage data confidentiality protection method. The method comprises: partitioning the data file to be uploaded to the cloud storage server by adopting the following method; then, obtaining a plurality of data blocks through scrambling and sequential recombination; dividing each data block into sub-data blocks; dividing the sub-data blocks into two parts; encryptingeach part by adopting different encryption algorithms; recombining the obtained ciphertext data blocks to obtain a ciphertext data file; uploading the data to a cloud storage server for storage; whendata needs to be used, the data can be used, downloading the ciphertext data file from the cloud storage server, dividing the ciphertext data file according to the inverse process of ciphertext datablock recombination during uploading, decrypting different parts by adopting different decryption algorithms, and recombining the decrypted data blocks according to the inverse process of data block recombination during uploading to recover the data file. According to the method, data block recombination and cross encryption are adopted, so that the security of storing the user data on the cloud storage server is improved.
Owner:UNIV OF ELECTRONIC SCI & TECH OF CHINA
Method and device for sending and receiving communication information
InactiveCN103561023APrevent monitoringAvoid disclosure of privacyTransmissionCommunications softwareEncryption
The invention discloses a method and device for sending and receiving communication information and a safety protection system. The method for sending the communication information includes the steps that a communication sending party generates a first secret key before communication data are sent, initial encryption is conducted on the first secret key through a second secret key, the communication sending party conducts secondary encryption on the initially-encrypted first secret key through a third secret key after initial encryption is conducted, the communication sending party sends the secondarily-encrypted first secret key to a communication receiving party, and the communication sending party is in encryption communication with the communication receiving party through the first secret key. Encryption is conducted on the communication data before the communication data are sent, secondary encryption is conducted on the encrypted communication data when the communication data are sent, and therefore dual-level protection is achieved for the communication data, communication software is prevented from monitoring the communication data of a user, and privacy is prevented from being revealed.
Owner:DAWNING CLOUD COMPUTING TECH CO LTD
Retractable magnetizing current lead device and method of same
PendingCN107068329AAchieve double protectionImprove stabilitySuperconducting magnets/coilsLow leakagePower flow
The invention discloses a retractable magnetizing current lead device and method of the same. The retractable magnetizing current lead device comprises three parts: a retractable normal conducting lead section (1) deposed inside a liquid nitrogen chamber, a high temperature superconducting transition lead section (2) thermally connected with a cold head (71) and a low temperature superconducting coil lead section (3), wherein the retractable normal conducting lead section (1) is connected with a high-temperature part; the high temperature superconducting transition lead section (2) is connected with a low temperature part; the low temperature superconducting coil lead section (3) is connected with a superconducting coil (8); a lower end of the retractable normal conducting lead section (1) is connected with an upper end of the high temperature superconducting transition lead section (2) by way of plugging and a retractable electrical contact (20) is disposed at the junction; a lower end of the high temperature superconducting transition lead section (2) is connected with the low temperature superconducting coil lead section (3) by welding; and a high current conductive rod (10) and a high temperature superconducting lead (24) together form a current path for the whole magnetizing lead. The retractable magnetizing current lead device has the characteristics of low conduction heat loss, high sealing performance and convenient excitation operation.
Owner:杭州图锐科技有限公司
Fingerprint authentication financial card and authentication method thereof
InactiveCN101763689ARealize security protectionAchieve double protectionBiometric pattern recognitionCoded identity card or credit card actuationAuthentication systemComputer science
The invention discloses a fingerprint authentication financial card and an authentication method thereof. The financial card and the method have the technical scheme that a fingerprint sensor and a fingerprint authentication system are arranged in the financial card and connected with a terminal machine through a periphery interface of the financial card to acquire power supply and clock signals of the terminal machine, and the identity authentication is finished by the financial card. The fingerprint authentication financial card and the authentication method have the advantages of low cost, high safety performance and high authentication speed.
Owner:刘鸣宇
Frequency conversion module temperature protection device and method and air conditioner
InactiveCN107228457AAvoid frequent start and stopExtended service lifeSpace heating and ventilation safety systemsLighting and heating apparatusTemperature controlFrequency conversion
The invention provides an air conditioner and a frequency conversion module temperature protection device and method. The frequency conversion module temperature protection device comprises a frequency conversion module, a built-in temperature sensor module, an external temperature sensor module and a control module, wherein the frequency conversion module comprises a device printing circuit board assembly with an intelligent powder module or an insulated gate type bipolar transistor; the built-in temperature sensor module is arranged in the intelligent power module or the insulated gate type bipolar transistor; the external temperature sensor module is arranged in the position, with the highest temperature, outside the intelligent power module or the insulated gate type bipolar transistor; and the control module is connected with the built-in temperature sensor module and the external temperature sensor module and used for controlling the frequency conversion module to enable the corresponding mode according to the detected temperature. According to the air conditioner and the frequency conversion module temperature protection device and method, the frequency limitation and frequency reduction are conducted on the frequency conversion module according to the temperature sensed by the external temperature sensor, the early-warming effect is good, the frequent start and stop of the frequency conversion module are avoided, when to conduct the shutdown protection is determined according to the temperature sensed by the external temperature sensor and the built-in temperature sensor, and the judgment reliability is improved.
Owner:GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1
Device for performing priority processing on fault of electric actuator based on CPLD and realizing method thereof
ActiveCN101667023AImprove protectionSave spaceProgramme controlComputer controlElectric machineryActuator
The invention relates to a device for performing priority processing on the fault of an electric actuator based on CPLD and a realizing method thereof. The device comprises a comparator, an optocoupler, a CPLD, a DSP, a motor excitation power module, an excess-temperature relay and a limit switch. Major loops of the electric actuator are connected with two input pins of the comparator; an output pin of the comparator, the motor excitation power module, the limit switch and the excess-temperature relay placed in a motor winding are connected to the CPLD through the optocoupler; and the CPLD isconnected with the DSP. N 74LS148 in the CPLD is selected to form a priority coder for performing priority processing on input fault signals. The invention reduces the design complexity of the system,saves the hardware space, has the advantages of simple operation, rapid judgment of fault signals, low cost, and the like, realizes double protection of software and hardware, improves the reliability of the system, realizes application of high performance and multifunction and has transportability, time performance and space performance.
Owner:HEBEI UNIV OF TECH
Dual chamber street lamp holder structure
InactiveCN101493221AReduce damage rateAchieve double protectionPoint-like light sourceOutdoor lightingEngineeringLight head
The invention provides a dual-cavity street lamp cap structure, comprising a lamp shell and a lamp set; wherein the lamp shell is internally divided into an air-tight first cavity and a water-tight second cavity by segmentation, while the lamp set is arranged between the first cavity and the second cavity, and the first cavity is light area of the lamp set. Due to air-tight space and water-tight space respectively formed by the first cavity and the second cavity, double protection of protecting the lamp body as the water-tight cavity and protecting the LED light source as the air-tight cavity is achieved and fault rate of the lamp set is reduced.
Owner:AMA PRECISION INC
Protection device of motor, motor and protection method of motor
ActiveCN108923387AEffective protectionIncrease flexibilityEmergency protective circuit arrangementsCurrent voltageEngineering
The invention discloses a protection device of a motor, the motor and a protection method of the motor. The protection device comprises a sampling module (102), a first comparison module (104), a switch module (106) and a first control module (108). The sampling module (102) is used for acquiring the current voltage of the motor; the first comparison module (104) is used for comparing the currentvoltage and a preset protection voltage. The switch module (106) is used for triggering a preset overcurrent protection signal when the current voltage is larger than or equal to the protection voltage and the degree that the current voltage is larger than the protection voltage is within a set range; and the first control module (108) is used for adjusting the output power of the motor accordingto the overcurrent protection signal to enable the current voltage to be decreased. According to the scheme, the problem of high cost due to the fact that an IPM module is provided with an overcurrentprotection module and a driving module composed of a discrete element and does not have an overcurrent protection function, and a peripheral protection circuit needs to be erected in the prior art issolved, and the effect of lowering the cost is achieved.
Owner:GREE ELECTRIC APPLIANCES INC
Dual protecting temperature control circuit and air frying pan
PendingCN108514343AAchieve double protectionTemperatue controlDeep fat fryersMicrocontrollerSmall amplitude
The invention relates to a dual protecting temperature control circuit and an air frying pan and relates to the technical field of temperature control circuits. The circuit comprises a single chip microcomputer, a PWM driving circuit, a relay and a silicon controlled control circuit which are successively connected, wherein the single chip microcomputer is also connected to a zero cross detectioncircuit and the silicon controlled control circuit, the relay is connected to a living wire, and the silicon controlled control circuit is connected to the relay or a zero line; the single chip microcomputer is used for acquiring the cross zero point of the zero cross detection circuit and capable of controlling the working condition of the silicon controlled control circuit to output a PWM pulsesignal; the PWM driving circuit is controlling the relay to be on and off according to the input PWM pulse signal; the reliability is improved based on small amplitude temperature control by means ofa serial control mode of the controlled silicon and the relay, so that the dual protecting function is achieved.
Owner:FOSHAN AIMEIHAO ELECTRONICS TECH CO LTD
Unmanned aerial vehicle motor phase loss monitoring protective device
InactiveCN106227083AAchieve double protectionIncrease currentProgramme controlComputer controlAutomatic controlControl system
The present invention discloses an unmanned aerial vehicle motor phase loss monitoring protective device, and relates to the field of the unmanned aerial vehicle detection technology. The device comprises an electrical regulation module, a brushless direct current motor, a voltage sampling signal conversion circuit, an MCU module and an unmanned aerial vehicle flight control system; the electrical regulation module is connected with the brushless direct current motor; the voltage sampling signal conversion circuit is connected between the circuits of the electrical regulation module and the brushless direct current motor; the voltage sampling signal conversion circuit, the MCU module and the unmanned aerial vehicle flight control system are connected in order; the unmanned aerial vehicle flight control system is connected with a parachute driving circuit and an alarm unit; and the parachute driving circuit is connected with a parachute execution mechanism. The unmanned aerial vehicle motor phase loss monitoring protective device can perform monitoring aiming at the power motor of the unmanned aerial vehicle, can transmit the abnormal information to a precise and complex flight control system and can provide response scheme of faults with automatic control in the full process and with no need for manual operation.
Owner:GUANGDONG RONGQE INTELLIGENT TECH CO LTD
Automatic switching system and automatic switching method of power supply
PendingCN106505725AAnti-overloadWith satietyPower network operation systems integrationInformation technology support systemMicrocomputerStandby power
The invention discloses an automatic switching system of a power supply. The system is used for automatically switching an external power supply to an emergency power supply to realize uninterrupted power supply. The automatic switching system is characterized by comprising a power supply switching circuit; the power supply switching circuit comprises an emergency power supply bt1, a fuse f200, a fuse f201, a fuse f203, a mem2313 chip, a resistor r1, a resistor r2, a resistor r3, a resistor r4, a resistor r5, a resistor r6, a resistor r7, a resistor r8, a diode d1, a diode d2, a diode d3, a diode d4, a diode d6, a diode d5, a diode d200, a diode d201, a diode d210, a diode d211, an audion q1, a capacitor c10, a capacitor c200, a capacitor c211, a capacitor c201, a capacitor c222, an inductor l200, a switch s1 and an AT89S51 single-chip microcomputer. The power supply switching system is designed, and the external power supply can be automatically switched onto the emergency power supply under the condition that the external power supply is abnormal, so that uninterrupted power supply of the system is guaranteed.
Owner:崔慧芳
Method for controlling user access permission in cloud platform
InactiveCN103188269AAchieve double protectionRealize managementTransmissionSystem administratorUser Privilege
The invention discloses a method for controlling user access permission in a cloud platform. The method comprises the steps that S1. a system administrator or a super user distributes the user right to an object i for each user, and the owner of the object i distributes the object access right to the object i for each user; S2. when a user j requests a cloud platform server to conduct certain operation on the object i, the server judges whether the user j has the user right to conduct the operation on the object i or not, if so, go to step S3, and if not, reject the operation request of the user j; and S3. the server judges whether the user j has the object access right to the object i or not, if so, accept the operation request of the user j, and if not, reject the operation request of the user j. According to the method, the access of different users to the object can be controlled and separated in the cloud platform, and dual protection on the confidential information of a common user can be realized by utilizing a VPN (virtual private network).
Owner:OPZOON TECH
Circulating stereo garage
PendingCN110778184AMeet charging needsNo jitterCharging stationsElectric vehicle charging technologyNew energyReduction drive
The invention relates to a circulating stereo garage, and relates to the technical field of stereo garages. The circulating stereo garage comprises a main frame, a lifting transmission device, a control system and carrying trays; the carrying trays are pairwise arranged; suspension plates are arranged on chains; the main frame is provided with wire sliding systems and tray stabilizing systems; thewire sliding systems comprise collectors and electric conducting slide rails; the tray stabilizing systems are arranged on each tray, and comprise motors, worm and gear speed reducers and dip angle detectors; and the control system communicates with lifting transmission devices and the tray stabilizing systems. The trays are always maintained horizontal during operation without shaking and swinging, and are higher in operation speed and set width; two openings can be arranged on the garage front and back to achieve more convenient and quicker vehicle parking and taking; each tray can realizeelectrification to meet the charging demands of part of new energy vehicles; and when the inclined angles of the trays exceed a set value, the condition can be timely discovered for adjustment or stopprotection, so that accidents can be effectively prevented.
Owner:樊能
Integrated lifting material platform with overload early warning device
PendingCN110002361AAchieve double protectionEasy loading and unloadingSafety devices for lifting equipmentsMeasurement devicesMarine engineeringElectrical control
An integrated lifting material platform with an overload early warning device comprises a lifting frame, a lifting material platform body arranged on the lifting frame, an anti-falling device which isarranged on the lifting frame and cooperates with the lifting material platform body, a pressure sensor arranged on the lifting material platform body, a speed sensor arranged on the lifting materialplatform body, a controller which is arranged on the lifting frame and connected with the pressure sensor and the speed sensor, an alarm device which is arranged on the lifting frame and connected with the controller, and a power system which is arranged on the lifting frame, connected with the lifting material platform body, used for driving the lifting material platform body to go up and down along the lifting frame, and connected with the controller. The integrated lifting material platform is high in safety coefficient and can be prevented from safety accidents by adopting the mode that mechanical protection cooperates with electrical control overload protection.
Owner:THE FIRST COMPARY OF CHINA EIGHTH ENG BUREAU LTD
Novel hydrogen storage bottle used for hydrogen energy automobile
PendingCN110726068AAchieve double protectionReduce air trappingVessel mounting detailsVessel geometry/arrangement/sizeHydrogen purityVacuum pumping
The invention provides a novel hydrogen storage bottle used for a hydrogen energy automobile. The bottle comprises a flexible inner container, a rigid outer container, a first bottle plug, a second bottle plug, a hydrogen pipeline and an air pipeline. The top end and the bottom end of the rigid outer container are provided with openings, the first bottle plug and the second bottle plug are inserted in the openings in the top end and the bottom end correspondingly, a gas interlayer is formed between the flexible inner container and the rigid outer container, one end of the flexible inner container is provided with an air pipeline connector, a first through hole is formed in the first bottle plug, one end of the air pipeline is connected to the air pipeline connector of the flexible inner container, the other end of the air pipeline penetrates through the first through hole, and through an outer air compressor, air is guided into the flexible inner container. A second through hole is formed in the second bottle plug, one end of the hydrogen pipeline is arranged outside the rigid outer container, and the other end of the hydrogen pipeline penetrates through the second through hole tocommunicate with the gas interlayer. The novel hydrogen storage bottle has the beneficial effects that before the hydrogen bottle is used, rapid vacuum pumping is carried out, air residue in the hydrogen bottle is reduced, the storage hydrogen purity is improved, and meanwhile, the storage hydrogen in the hydrogen bottle can be effectively and completely sufficiently released to be used.
Owner:中极氢能汽车(长治)有限公司
Robot safety control method, device, equipment and storage medium
ActiveCN110370288AImprove securityAchieve double protectionProgramme-controlled manipulatorKey pressingSafety control
The embodiment of the invention discloses a robot safety control method, device and equipment and a storage medium, wherein the robot safety control method comprises the steps that whether a fault exists in a controller local area network between a drive and a controller is judged; and if yes, the drive controls a motor of a robot to stop, and / or the drive controls the motor to stop through an emergency stop key, wherein the emergency stop key is connected with an input-output port of the drive. According to the technical scheme provided by the embodiment of the invention, the emergency stop key is connected with the drive directly, thus when the communication fault exists in connection of the drive and the controller, the drive can stop the motor through the emergency stop key, the motorcan also be stopped directly, dual protection for the robot motor is achieved, and safety of the robot is improved greatly.
Owner:SUZHOU BOZHON ROBOT CO LTD
Electric refrigerated truck power supply system and control method thereof, electric refrigerated truck
InactiveCN108202575AAchieve double protectionAchieve interlockAir-treating devicesVehicle heating/cooling devicesTruckElectrical battery
The invention provides an electric refrigerated truck power supply system and a control method thereof, and an electric refrigerated truck. The electric refrigerated truck power supply system comprises a power cell, a storage battery, a control module and a refrigerating unit; the refrigerating unit comprises a high voltage electric appliance set and a low-voltage electric appliance set; the highvoltage electric appliance set and the low-voltage electric appliance set are powered by the power cell; a DC / DC module is installed between the power cell and the low-voltage electric appliance set;a first-level switch block is installed between the DC / DC module and the low-voltage electric appliance set; the storage battery is connected with the low-voltage electric appliance through the first-level switch block. When the DC / DC module breaks down, the control module controls the operation of the first-level switch block, so that the power battery stops supplying power to the low-voltage electric appliance set, and power is supplied to the low-voltage electric appliance set by the storage battery. The setting of the first-level switch block and the storage battery ensures that when the DC / DC module fails, the low-voltage electric appliance set can also work normally, and the quality of the loaded items will not be affected.
Owner:BYD CO LTD
Corrugated steel pipe-steel sandwich layer composite pipe concrete combined component
PendingCN109385953ACompact structureGood anti-seepage and corrosion resistanceArtificial islandsBridge structural detailsMaterials scienceSteel tube
The invention discloses a corrugated steel pipe-steel sandwich layer composite pipe concrete combined component, and relates to a building structural component. The component solves the problems thatexisting steel pipe concrete structures are poor in corrosion resistance and weak in anti-collision and anti-impact capability, and external steel pipes easily bulge outward partially. The corrugatedsteel pipe-steel sandwich layer composite pipe concrete combined component comprises a corrugated steel pipe (1), a sandwich layer filler (2), a steel pipe (3) and core concrete (4); the steel pipe (3) is coaxially located in the corrugated steel pipe (1), the portion between the corrugated steel pipe (1) and the steel pipe (3) is filled with the sandwich layer filler (2), the corrugated steel pipe (1), the sandwich layer filler (2) and the steel pipe (3) constitute a corrugated steel pipe-steel sandwich layer composite pipe, and the steel pipe (3) is filled with the core concrete (4). The corrugated steel pipe-concrete-steel pipe combined component is used for building and bridge piers.
Owner:HARBIN INST OF TECH
Novel anti-theft device implemented through automatically padlocking parked vehicles
InactiveCN102795278AGood anti-vandalismGood active anti-theftAnti-theft cycle devicesEmbedded systemAnti theft
The invention discloses a novel anti-theft device implemented through automatically padlocking parked vehicles, belonging to the field of anti-theft devices for vehicles. The existing anti-theft locks for battery cars or motorcycles are not high in anti-theft property, easy to be damaged violently, and unlocked inconveniently. The novel anti-theft device disclosed by the invention comprises an electronic lock and a parking double-bracket, wherein the parking double-bracket comprises a transversely-arranged rotating shaft and two vertically-arranged brackets which are fixedly arranged on the rotating shaft; and the novel anti-theft device is characterized in that: the electronic lock is fixedly arranged at the bottom of a vehicle and the rotating shaft of the parking double-bracket, the power of the electronic lock is supplied by a 12-18V power vehicle-mounted storage battery matched with the electronic lock, and the electronic lock is in signal connection with a power lock for vehicles, so that the padlocking and unlocking of a vehicle can be automatically realized just through disconnecting or connecting the power supply of the electronic lock. The novel anti-theft device disclosed by the invention is good in anti-theft property and uneasy to be damaged violently; and the novel anti-theft device is convenient to use, and an operation of unlocking can be completed just through driving.
Owner:邢建兵
Thyristor overvoltage detection circuit used for TCR type high-voltage SVC device
ActiveCN105158669AImprove reliabilityLow priceIndividual semiconductor device testingOvervoltageAudio power amplifier
The invention is suitable for the technical field of SVC device safety detection, and provides a thyristor overvoltage detection circuit used for a TCR type high-voltage SVC device. AC voltage of the two ends of a thyristor is rectified into positive half-wave voltage by a rectification circuit. Positive half-wave generated through rectification is scaled to voltage range of the input end of an isolation amplifier by a high-voltage side differential proportion amplification circuit. Voltage signals detected by a high-voltage side circuit are transmitted to a low-voltage side circuit in an isolation mode by the isolation amplifier. Voltage outputted by the isolation amplifier is amplified and outputted to an overvoltage judgment and comparison circuit by a low-voltage side differential proportion amplification circuit. The detected voltage and an overvoltage threshold value Vref are compared via the judgment and comparison circuit. The thyristor is triggered to be conducted by controlling a thyristor trigger circuit according to the comparison result when the thyristor is overvoltage. The circuit is quite concise, element price is low, and problems that conventional high-voltage thyristor overvoltage detection circuits are high in cost, complicated in circuit and inflexible in overvoltage parameter setting can be solved.
Owner:WISDRI ENG & RES INC LTD
Method for realizing cell switching of multi-electrolyte battery by using conduction of electrolytes
InactiveCN105355991AAchieve openAchieve closureSecondary cells servicing/maintenanceLower limitEngineering
The invention relates to the technical field of batteries, and concretely relates to a method for realizing cell switching of a multi-electrolyte battery by using conduction of electrolytes. The multi-electrolyte battery comprises an anode plate, a cathode plate and electrolytes, the electrolytes comprises an anode electrolyte, a cathode electrode and a bridge electrolyte, the anode electrolyte is in contact with the anode plate, the cathode electrode is in contact with the cathode plate, the bridge electrolyte is placed between the anode electrolyte and the cathode electrolyte to form an ion conduction channel, and the bridge electrolyte, the anode electrolyte and the cathode electrolyte are respectively separated by ion exchange films. The electrolytes are controlled to be in a non-conduction state to cut out the ion conduction channel in order to conveniently realize off of the battery, so the cell of the battery also has a battery switching function, thereby dual protection of a circuit is realized, and the safety of the battery is greatly improved; and the self-discharge of the battery can be reduced to a lowest limit when the electrolytes are in a non-conduction state.
Owner:GUANGZHOU DAODONG NEW ENERGY CO LTD
Intelligent key cabinet based on tough screen and PLC
ActiveCN105261093AAvoid lossAchieve double protectionIndividual entry/exit registersPush pullEngineering
The invention provides an intelligent key cabinet based on a tough screen and a PLC, and relates to an intelligent and secure management device. The intelligent key cabinet comprises a key cabinet box, the touch screen, a PLC host, a plurality of key cabinet bodies and a plurality of key tables. The key cabinet bodies are evenly distributed in the key cabinet box, each key cabinet body is provided with a cabinet door, the cabinet doors are locked on the key cabinet bodies through electrical locks respectively, the key tables are arranged in the key cabinet bodies respectively, and the PLC host is connected with the touch screen. Each key table comprises a key box and an identity box. Each key box and each identity box each comprise a key inlet / outlet and an identity card inlet / outlet. Each key box and each identity box are each internally provided with a microswitch and a push-pull electromagnet. The microswitches of the key boxes and the push-pull electromagnets are connected with the microswitches and the push-pull electromagnets of the identity boxes through wires. Great convenience is provided for life of people. Dual protection of keys of users is achieved through the key cabinet bodies and the key tables, and security is improved.
Owner:YANGZHOU POLYTECHNIC COLLEGE
Maintenance trolley for medium-voltage switchgear
A maintenance trolley for a medium-voltage switchgear is applied in maintenance of a high-voltage switchgear. An upper lead screw driving mechanism and a lower lead screw driving mechanism respectively drive an upper crossbeam and a lower crossbeam push an upper pushing board and a lower pushing board for starting a static contact curtain door of the high-voltage switchgear. An insulating board and a lower insulating board are respectively linked with the upper crossbeam and the lower crossbeam. A single-side static contact curtain door of the high-voltage switchgear can be opened according to the requirement, and furthermore one insulating board is added outside the opened static contact curtain door of the high-voltage switchgear, thereby realizing double protections and facilitating an operator in switchgear body maintenance. Furthermore the maintenance trolley has advantages of high safety factor, effective monitoring a maintenance field and performing warning, high convenience in use and maintenance, simple structure, low cost and good recyclability.
Owner:STATE GRID JIANGSU ELECTRIC POWER CO ZHENJIANG POWER SUPPLY CO +1
Package method of stewed and roasted chicken feet
PendingCN109956082AGreat tasteCortex tightPackage sterilisationPackaging by pressurising/gasifyingRoast chickenNitrogen
The invention relates to a package method of stewed and roasted chicken feet. The problems of short storage time and high packaging cost of food packaging in the prior art are solved. The package method comprises the following steps that (1) fresh chicken feet are put into a cooking pot, and seasonings is added for seasoning; (2) the cooked chicken feet are taken out and naturally air-dried; (3) the air-dried chicken feet are put into an oven for baking in a frying mode; (4) the processed chicken feet are weighed, sub-packaged and placed in packaging bags; (5) the packaging bags with food areplaced in a mold cavity of a sealing machine, and the mold cavity is vacuumized, and then injected with nitrogen gas; (6) the chicken feet are irradiated with cobalt 60 for sterilization, and the packaging bags are finally sealed; and (7) the packaging bags packed with the chicken feet are put into packaging boxes, the packaging boxes and the packaging bags are put into a mold cavity of a pressingmold for covering plastic thin film cover bodies, the mold cavity is vacuumized and injected with nitrogen, and finally openings of the packaging boxes are covered with the plastic thin film cover bodies.
Owner:南安市洪濑黑果食品有限公司
Lightning proof protection module for telephone set
InactiveCN1595754AQuick responseWithstand high voltageEmergency protective arrangements for limiting excess voltage/currentElectrical resistance and conductanceLightning strokes
The invention is a telephone lightning stroke shielding protective module, composed of a gas discharge tube, a pressure sensitive resistance and two inductance components, where the gas discharge tube is connected in parallel with the input end to play the role in first-stage protection, the pressure sensitive resistance is connected with the output end to absorb the residual waves without being absorbed by the gas discharge tube, and thus it plays a double role in protecting and simultaneously connects in series two inductors in a circuit to inhibit the damage of surge current to the telephone. The circuit is placed in a small fire retardant plastic box and sealed and integrated as a telephone lightning stroke shielding module. It adopts double protection and prevents both surge voltage and current, therefore safer and more reliable and able to meet national test requirements on lightning stroke shielding property.
Owner:SHANGHAI JIAO TONG UNIV
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