185results about How to "Achieve double protection" patented technology

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.

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.

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.

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.

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.

A retractable magnetizing current lead device and its use method, comprising a retractable normal lead segment (1) arranged in a liquid nitrogen chamber, a high temperature superconducting transition lead segment (2) thermally connected to a cold head (71) ), and the lead-out section of the low-temperature superconducting coil (3); ) is connected to the superconducting coil (8); the lower end of the retractable normal lead segment (1) is connected to the upper end of the high-temperature superconducting transition lead segment (2) by plugging, and a retractable electrical contact (20) is provided at the connection point, The lower end of the high-temperature superconducting transition lead segment (2) is welded to the low-temperature superconducting coil lead-out segment (3); the high-current conductive rod (10) and the high-temperature superconducting lead (24) together form a current path for the entire magnetizing lead; It has the characteristics of low conduction heat leakage, high sealing performance and convenient excitation operation.

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.

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.

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.

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.

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).

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.