757results about How to "Guarantee working reliability" patented technology

The invention provides a protection method of a modular multi-level current converter. The current converter comprises a sub-module controller and a sub-module; when the sub-module breaks down, the sub-module controller monitors and acts on the sub-module, so as to remove the failed sub-module timely, and the normal operation of the modular multi-level current converter can be ensured. According to the protection method provided by the invention, the overall current converter is not exited due to the fault of the sub-module, meanwhile, the sub-module is not integrally damaged due to the fault of the components in the sub-module, thereby greatly improving the utilization of the modular multi-level current converter and improving the stability of the system operation.

The invention relates to a two-component sealing adhesive with low viscosity and high thermal conductivity and a preparation method thereof. The two-component sealing adhesive consists of a component A and a component B in a weight ratio of 100:80-100:125, wherein the component A comprises the following raw materials by weight percent: 40.00%-90.00% of thermal conductive powder, 4.50%-50.00% of low-viscosity liquid silicone oil, 0.50%-10.00% of silicane curing agent and 0.00-5.00% of toner; and the component B comprises the following raw materials by weight percent: 40.00%-90.00% of thermal conductive material, 9.50%-54.00% of low-viscosity liquid silicone oil, 0.04%-1.00% of catalyst and 0.00-5.00% of toner. The preparation method comprises the following steps: weighting all the raw materials according to the weight persentages to prepare the component A and the component B; and when in use, mixing the component A and the component B evenly in a weight ratio of 100:80-100:125, and curing to obtain the sealing adhesive of the invention.

The invention discloses an anti-drunk driving vehicle-mounted system capable of ensuring driver uniqueness. The vehicle-mounted system comprises an alcohol detector, an A/D converter and a starting controller; the alcohol detector is connected with the A/D converter; the vehicle-mounted system also comprises a face identification system, a CCD sensor circuit, an air valve and a central processor,wherein the face identification system is connected with the CCD sensor circuit and the central processor respectively; the central processor is connected with the A/D converter, the starting controller and the air valve respectively; the air valve comprises an air port; and the alcohol detector is arranged at the position close to the air port. The vehicle-mounted system uses an alcohol detection system as main detection and uses the face identification system as auxiliary monitoring, combines the two systems to monitor the driver in the whole course at the same time of avoiding drunk driving, can carry out uniqueness control for the driver, and is used for preventing the corrupt actions that the driver bribes others or stops the vehicle in the middle way to change others to drive the vehicle.

The invention relates to a liquefaction system and a liquefaction method for NG (Natural Gas). The system comprises a cold box, a supply pipe for supplying the NG to the cold box, a No.1 refrigerant liquefaction subsystem, a No.2 refrigerant liquefaction subsystem, a No.1 refrigerant cooling subsystem, a No.2 refrigerant cooling subsystem, a heavy hydrocarbon separation tank which is used for conducting gas-liquid separation to liquid heavy hydrocarbon and gas light hydrocarbon, and an LNG (Liquefied Natural Gas) storage tank which is used for storing LNG obtained through liquefaction, wherein the cold box comprises an NG precooling passage which is connected with the heavy hydrocarbon separation tank and is used for supplying the NG; an NG deep cooling passage which is connected with the LNG storage tank and is used for supplying the gas light hydrocarbon; a No.1 refrigerant precooling passage and a No.2 refrigerant precooling passage which are used for respectively supplying and cooling high-pressure No.1 refrigerant and high-pressure No.2 refrigerant which are respectively supplied by the No.1 refrigerant liquefaction subsystem the No.2 refrigerant liquefaction subsystem, and are used for respectively supplying the cooled high-pressure No.1 refrigerant and the cooled high-pressure No.2 refrigerant to the No.1 refrigerant cooling subsystem and the No.2 refrigerant cooling subsystem; and a No.1 refrigerant cooling passage and a No.2 refrigerant cooling passage which are used for respectively supplying low-temperature No.1 refrigerant and low-temperature No.2 refrigerant which are respectively supplied by the No.1 refrigerant cooling subsystem and the No.2 refrigerant cooling subsystem to cool the NG, high-temperature No.1 refrigerant and high-temperature No.2 refrigerant. By adopting the technical scheme, the complexity and the energy consumption of the system can be reduced.

The invention discloses a pumping system and a distributing valve thereof, and concrete transporting machinery. The distributing valve of the pumping system comprises a first valve body plate, a second valve body and a rotatable valve plate, wherein the first valve body plate and the second valve body are respectively in sliding matching with two surfaces of the valve plate; the distributing valve has two states, in the first state, a first sucking hole is communicated with a material container through a first passing communicating hole, and a second discharging hole is communicated with a second pumping hole through a second passing communicating hole; and in the second state, a second sucking hole is communicated with the material container through a passing communicating hole, and a first discharging hole is communicated with a first pumping hole through the other passing communicating hole or the first passing communicating hole. The valve plate of the distributing valve does not need to rotate in a hopper, and the distributing valve does not need to be matched with an opening hopper for use; meanwhile, the state conversion of the distributing valve is realized through the rotary valve plate, a driving force required by the distributing valve during state conversion is greatly reduced, and the energy consumption of the distributing valve can be reduced.

The invention provides a hollow anode for a plasma thruster of a cusped magnetic field, and relates to a plasma thruster of a cusped magnetic field. By the hollow anode for the plasma thruster of the cusped magnetic field, the problems that a permanent magnet is demagnetized and the service life of a thrust is shortened due to the fact that an anode of the existing thruster of a cusped magnetic field is over hot are solved. The ionization rate of the thruster is increased, and the performance of the thruster is further improved. The hollow anode for the plasma thruster of the cusped magnetic field comprises a gas distributor, a buffering cavity and a ceramic sleeve, wherein a gas supply piece comprises a guide tube and a cavity; and the gas distributor comprises the gas supply piece and a distributor bottom plate. The hollow anode for the plasma thruster of the cusped magnetic field is used in the field of plasma thrusters of the cusped magnetic field.

The invention discloses a heat radiation structure of a mobile terminal. The heat radiation structure comprises an installation bracket, wherein a mainboard heat radiation region and a camera shooting heat radiation region are arranged on the installation bracket in parallel, the mainboard heat radiation region is used for controlling temperature rise of a mainboard module, the camera shooting heat radiation region is used for controlling temperature rise of a camera module, the mainboard heat radiation region adjoins to one side of the mainboard module, the camera shooting heat radiation region is arranged on one side, away from the camera module, of the mainboard heat radiation region. According to the mobile terminal and the heat radiation structure thereof, the camera shooting heat radiation region used for controlling temperature rise of the camera module is arranged in a region outside the mainboard module and the camera module, so that the heat of the camera module is isolated from that of the mainboard module, and the heat of the mainboard module and the camera module is prevented from interactively affecting the heat radiation efficiency of the two modules even normal operation of the two modules, thereby ensuring heat radiation efficiency and stable operation of the mainboard module and the camera module simultaneously.

The invention discloses an electronic detonator initiation system achieving communication through a repeater and a control method of the electronic detonator initiation system. The repeater and a coder are in wireless communication with a detonation controller, the repeater is in wired communication with an electronic detonator through a signal bus, and a power source is provided for the electronic detonator; meanwhile, wireless communication signals coming from the detonation controller and the coder are transferred to the electronic detonator in a wired communication signal manner, and feedback information, responding to various commands of the detonation controller and the coder, of the electronic detonator is returned to the detonation controller and the coder in a wireless communication signal manner; wireless transmitting-receiving units and the power sources of multiple electronic detonators are integrated to the repeater, the cost of signal electronic detonators is reduced, hardware circuits of the electronic detonators are simplified, and the working reliability of the electronic detonator initiation system is improved; and meanwhile, the friendliness to the detonation surrounding environment is improved, the signal transmission distance of detonation networks of the repeater is increased, and the coverage scope of detonation zones when one-time detonation operation is implemented is expanded.

The invention discloses an unmanned aerial vehicle surveying and mapping system for power transmission lines, including an unmanned aerial vehicle, on which a rangefinder, a camera, a wireless data module, a GPS module, a controller, a storage battery, a rangefinder, and a control port of a camera are installed. Connect the command output port of the controller, connect the data output port of the rangefinder, wireless data module, camera, and GPS module to the data receiving port of the controller, connect the data output port of the controller to the data receiving port of the wireless data module, and set the console There is a module corresponding to the wireless data module. There is also a digital magnetic field meter on the drone. The data output port of the digital magnetic field meter is connected to the data receiving port of the controller. The information is transmitted to the controller in digital form, and the controller controls the course and altitude of the UAV according to the strength of the magnetic field, so that the UAV can automatically patrol along the transmission line.

The invention relates to a flexible control loop of a hydraulic cylinder. The flexible control loop of the hydraulic cylinder comprises an oil inlet path (13), an oil return path (14), a first working oil path (15), a second working oil path (16) and a main oil path steering valve (1) for realizing flexible control over the hydraulic cylinder (4), wherein the first working oil path (15) and the second working oil path (16) are respectively connected to a rod cavity and a rodless cavity of the hydraulic cylinder (4); and a switching valve for controlling the first working path (15) to open and close is connected to the first working oil path (15). Besides, the invention also provides engineering mechanical equipment provided with the flexible control loop of the hydraulic cylinder. According to the flexible control loop of hydraulic cylinder and the engineering mechanical equipment disclosed by the invention, by arranging the switching valve on the first control oil path, the first control oil path is controlled to open and close as required, a stroke locking function for preventing a stretching member of the hydraulic cylinder from continuously extending due to accidental means is effectively realized, and therefore working reliability of the hydraulic cylinder is ensured.

The invention discloses a multifunctional cooking utensil. The multifunctional cooking utensil comprises an upper shell and a lower shell, an air inlet and an air outlet are formed in the upper shell;a air guide cover r is arranged below the upper shell; a cold air cavity is defined between the upper shell and the air guide cover; the air inlet and the air outlet are communicated with the cold air cavity; a motor and a cold air fan are arranged in the cold air cavity; the cold air fan is fixedly connected with a motor shaft of the motor; a hot air fan and a heating element are arranged belowthe air guide cover; a motor shaft penetrates through the air guide cover and then is fixedly connected with the hot air fan; a containing cavity is formed in the lower shell body, a container is arranged in the containing cavity, the multifunctional cooking utensil further comprises a steam generation device for providing steam for the container. The cold air cavity is hermetically separated fromthe containing cavity; and a steam exhaust channel is formed in the upper shell, a first communicating opening of the steam exhaust channel communicates with the containing cavity, a second communicating opening of the steam exhaust channel communicates with the outside, and the second communicating opening is located in the upper shell and is formed in the side different from the side provided with the air inlet.

The invention relates to a single-phase multifunction electric energy meter calibration stand automatic short circuit automatically connecting device, comprising a box body (1), a current wire connecting terminal component (2) and a voltage wire connecting terminal component (3); the front side of the box body (1) is fixedly connected with an assistant terminal needlebar component (5) which comprises an assistant terminal needlebar body (5.1), an assistant terminal probe (5.2), a circuit board (5.3) and a socket (5.4); the assistant terminal needlebar body (5.1) is fixedly connected with the front side of the box body (1), the assistant terminal probe (5.2) is vertically inserted in the assistant terminal needlebar body (5.1), the lower end of the assistant terminal probe (5.2) is connected with the circuit board (5.3), and the socket (5.4) is connected with the circuit board (5.3) and is arranged outside the box body (1). The invention can realize the automatic contact joint of the current, the voltage and the assistant wire connecting terminal in the whole electric energy meter testing process at one time, and the functional reliability is high when heavy current passes through. The device of the invention has the automatic wire connecting function, the automatic short circuit function and the socket attaching function.

The invention relates to a protection circuit for preventing an LED from an impact. The protection circuit comprises a discharging capacitance and an LED load. Besides, the protection circuit is characterized in that: the protection circuit also comprises a field effect transistor, a first resistor, a second resistor, a first triode, a third resistor, and a fourth resistor; a resistance value of the second resistor is greater than or equal to a ratio of a threshold voltage of the first triode to a maximum breakdown current of the LED load; a drain electrode of the field effect transistor is connected with an output power supply cathode of an LED driver; one path of a source electrode of the field effect transistor is connected with a direct current power supply cathode of the LED driver through the second resistance; and the other path of the source electrode of the field effect transistor is connected with a base electrode of the first triode through the fourth resistance; an emitter electrode of the first triode is connected with the output power supply cathode of the LED driver; and one path of a grid of the field effect transistor is connected with a collector electrode of the first triode through the first resistance and the other path of the grid of the field effect transistor is connected with a direct current voltage through the third resistance. According to the invention, a low voltage field effect transistor is employed to carry out current limitation, so that a response speed of a whole circuit is fast and circuit power consumption is low; besides, an impact current from an LED driving power supply on a back stage LED load can be effectively inhibited as well as service life of the LED load can be prolonged.

The invention relates to a high-performance synthetic rubber asphalt waterproof coiled material with good high and low temperature resistance, high bonding strength, good air permeability, high surface tensile strength and capability of meeting the long-term water leakage-proof use requirement in a 'composite waterproof system'. The coiled material consists of an upper coverage layer, a lower coverage layer and a middle waterproof layer, wherein the upper coverage layer is made of polyethylene polypropylene fibers, a polyethylene film or a metal aluminum foil; the lower coverage layer is made of needled polyester non-woven fabric; and the middle waterproof layer is made of modified asphalt glue layer prepared from modified asphalt glue. The performance of the coiled material is improved by organically and comprehensively utilizing special functional materials, multiple macromolecules and inorganic materials, the waterproof performance of the coiled material is greatly improved, the cost of the coiled material is effectively reduced, the service life of the coiled material is reliably guaranteed, and the coiled material used with non-curing glue can make a substantial contribution to construction of a complete composite waterproof system, so the coiled material has obvious technical advancement and strong practicability.

The invention belongs to the electrical technical field and provides an inversion driving circuit for an IGBT (insulated gate bipolar transistor) induction heating power source. The inversion driving circuit for the induction heating power source comprises a pulse signal receiving and conditioning circuit (2), an isolating circuit (3) and a current amplifier (4). The pulse signal receiving and conditioning circuit (2) is communicated with an external circuit through optical fibers. The isolating circuit (3) is communicated with the pulse signal receiving and conditioning circuit (2). The current amplifier (4) is communicated with the isolating circuit (3). The inversion driving circuit further comprises an overvoltage protection and du/dt protection circuit (6), a transient suppression circuit (5) and an alarm output circuit (7). By means of the inversion driving circuit for the induction heating power source, quality of driving pulse signals is guaranteed while coupled signals returned from the direction of the IGBT are prevented from interfering operation of the driving circuit; and operational reliability of the IGBT is guaranteed while damage of IGBT devices can be effectively avoided.

The invention belongs to the technical field of communication and navigation and in particular relates to a multi-frequency navigation terminal antenna. A top-layer feeding point is arranged at the center of a first-layer micro-strip patch; a central feeding hole is vertically formed in the top-layer feeding point; a first feeding point is arranged at a second-layer micro-strip patch; a first feeding hole is vertically formed in the first feeding point; a second feeding point is arranged at a third-layer micro-strip patch; a second feeding hole is vertically formed in the second feeding point; a third feeding point is arranged at a fourth-layer micro-strip patch. The antenna also comprises first short circuit metallized via holes and second short circuit metallized via holes which are used for eliminating coupling influence of feeding probes in all the feeding holes. The multi-frequency navigation terminal antenna disclosed by the invention can cover L band and S band of first-generation Beidou, B1 band and B3 band of second-generation Beidou and L1 band of a GPS (Global Positioning System); the demands on minimization and lightness of antenna size are met while good impedance bandwidth, axial ratio bandwidth and high-gain performance can be guaranteed.

The invention discloses a screen printing device for a storage battery packaging line. The screen printing device comprises a rack, a vertical sliding seat, a horizontal sliding seat, a screen printing mechanism and a stencil support, wherein columns are fixedly arranged on the rack, and the vertical sliding seat is vertically and slidably arranged on the columns and comprises a bottom plate slidably arranged on the columns, and a sliding seat body vertically and slidably arranged on the columns and positioned above the bottom plate; the bottom plate is connected with a first vertical regulating mechanism arranged on the rack, and the sliding seat body is connected with the bottom plate through a second vertical regulating mechanism; the horizontal sliding seat is horizontally and slidably arranged on the sliding seat body and is connected with a horizontal driving device arranged on the sliding seat body, and the screen printing mechanism is arranged on the horizontal sliding seat and can be used for screen-printing the upper surfaces of tiled storage batteries; the stencil support is fixedly arranged on the bottom plate, and a screen printing stencil is fixedly arranged on the stencil support and is positioned below the screen printing mechanism; the rack is matched with a clamping mechanism for clamping the storage batteries in a screen printing station. The screen printing device can facilitate the disassembly and cleaning of the screen printing stencil.