296results about How to "Control switch" patented technology

The invention provides a device for preventing current of a buck circuit from flowing reversely, a convertor and a power supply. The method comprises the following steps of: sampling input voltage Vin of the buck circuit and a work duty ratio D of a rectification switching tube in the buck circuit, and obtaining theoretical output voltage Vin*D by using the Vin and D; comparing the theoretical output voltage and actual output voltage of the buck circuit; when the theoretical output voltage is less than the actual output voltage, controlling a follow current switching tube in the buck circuit to be turned off; and when the theoretical output voltage is more than or equal to the actual output voltage, controlling the follow current switching tube in the buck circuit to be turned on. The turn-on and turn-off condition of the follow current switching tube of the buck circuit is actually controlled, and reverse current in an output filter inductor is avoided under the condition that an output end has pre-bias when the follow current switching tube is turned on in a normal turn-on and turn-off state.

The invention relates to an elevator operation and maintenance monitoring method based on an intelligent visual light curtain. The method comprises the following steps that a camera and a processor are mounted in each elevator lift car, wherein the camera and the processor conduct communication transmission through a data line, and the camera is mounted in the middle above a door frame of an elevator door; each camera acquires video images in real time and transmits the images to the corresponding processor; each processor achieves full field-of-view automatic visual analysis for the area space of the corresponding elevator lift car door through an intelligent visual algorithm, and elevator faults are discovered and treated in time; and analysis and treatment results are gathered to obtain elevator operation and maintenance data which are transmitted to an elevator operation and maintenance monitoring center. Omnibearing monitoring is achieved by adoption of the elevator intelligent visual light curtain, dead zones do not exist, and the shortcomings that an infrared light curtain cannot discover small objects or is insensitive in distinguishing of the small objects are fundamentally overcome; and the monitoring range is expanded, opening and closing of the elevator door are better controlled, namely the delay door closing function is achieved, and equipment does not move along with opening and closing of the elevator door and is not prone to being intervened by external force.

The invention discloses a printing head for 3D printing. The printing head comprises a machine shell, a screw extruding system, an installation seat, barrels, valve needles and spray nozzles. A drive system is arranged at one end of the machine shell. The screw extruding system is arranged in the machine shell and is composed of at least two screws which are embedded internally and externally, and at least one screw is driven by the drive system. The installation seat is mounted below the screw extruding system. One or more inner holes are distributed in the installation seat in the axial direction, and a discharge outlet is formed in the top or the side face of each inner hole. The barrels are mounted in all the inner holes of the installation seat correspondingly, the barrels extend out from one end of the installation seat, and barrel feeding openings are formed in the top ends of the barrels. Valve cavities are formed in the barrels. The valve needles penetrate through all the valve cavities of the barrels to be mounted on the installation seat, and the gaps between the valve needles and the valve cavities form discharging channels communicating with the feeding openings of the barrels. The spray nozzles are arranged at the tail ends of all the barrels. The printing head for 3D printing is light in weight, small in size, capable of achieving high printing precision and printing speed, novel in design, high in practicability and high in economic value.

The invention discloses a multi-level access system and an implementation method thereof. The implementation method comprises the following steps that on the basis of an access server, the access server is connected into a local area network by a WIFI module so as to communicate with an intelligent mobile terminal accessed into the local area network; the level of a requester is identified by an identification number of the intelligent mobile terminal, and if the identification number is from the intelligent mobile terminal of an administrator, an access lock is controlled for locking and unlocking by comparing whether a password inputted by the requester is consistent to a stored access password of the administrator; if the identification number is from the intelligent mobile terminal of an internal personnel, the access lock is controlled for locking and unlocking by comparing whether an answer of a question is consistent to a stored standard answer; and if the identification number is from the intelligent mobile terminal of an external personnel, the access lock is controlled for locking and unlocking by collection of image information and voice information of the requester and confirmation of the internal personnel the requester wants to make an appointment with. The multi-level access system and an implementation method disclosed by the invention are convenient and safe and can be applied to places with high security level.

The invention relates to binding equipment in the textile industry, which comprises a frame, an actuating unit, a hold-down mechanism, a steel needle movement mechanism and a plastic pin extruding mechanism, wherein the hold-down mechanism, the steel needle movement mechanism and the plastic pin extruding mechanism which are connected to the actuating unit are driven by the actuating unit to reciprocate up and down along a guide rail on a guide rail support of the frame; and the actuating unit is fixed on the frame. The binding equipment is characterized in that the actuating unit is an electric mechanism. The equipment is suitable for binding clothes, shoes and hats, and socks in families or individual workshops, and can be used for binding hangtags or a plurality of pairs of socks. The equipment is suitable for binding products with different thicknesses, and can bind plastic pins with different specifications through adjustment. The equipment is operated by means of driving two cams and a connecting rod by a motor, and changes the phenomenon that the prior equipment realizes binding through three cylinders. The binding equipment has the advantages of no air source limitation tooperation places and simple and reliable operation.

The invention relates to the technical field of surface coating modification of orthopedic implantation instruments, in particular to a preparation method of a surface coating of an orthopedic implantation instrument, and provides a method for loading and controlling release of copper-citrate nanoclusters on the surface of the orthopedic implantation instrument through polydopamine. The preparation method of the coating is simple and convenient, is wide in application range, and can be applied to various orthopedic implantation instruments. Besides, the change of the ph value can be respondedthrough polydopamine, and the release concentration of the copper ions can be regulated and controlled, so that the conversion between osteogenesis and antibacterial functions of the implanted instrument is controlled.

The invention relates to a fluorescent screening system including a white light source exciter, a first light filter piece set, a second light filter piece set, a CCD camera and a lens. The white light source exciter emits a white light source which is then transported to the first light filter piece set. Both the first light filter piece set and the second light filter piece set respectively includes a plurality of different band-pass light filter pieces. Each band-pass light filter piece allows the light source signals in corresponding wavebands to pass while light source signals in other wavebands are filtered away. Under control of a light filter wheel, the first light filter piece set selects one light filter piece according to screening demand of fluorescent proteins in different wavelengths. The white light source, when being filtered through the light filter piece, selects excited light in required wavelength. The selected excited light then is transported to a sample to excite a fluorescent signal. The second light filter piece set selects one light filter piece under control of the light filter wheel, so that the fluorescent signal can pass through the light filter piece in the second light filter piece set to remove stray light signals. The fluorescent signal finally is collected by means of the lens to complete fluorescent imaging with the CCD camera.

The invention discloses a serial communication interface function switching circuit and method and is used for solving the technical problem that for realization of multifunctional serial communication, CPU multiway serial resources need to be consumed or manual switching needs to be carried out or an expensive analog switch is adopted. The embodiment of the invention comprises a first receiving control circuit, a first transmitting control circuit, a second receiving control circuit, a second transmitting control circuit, a mode switching signal interface, a first transmitting and receiving control signal interface, a first receiving enabling signal interface, a first transmitting enabling signal interface, a second receiving enabling signal interface and a second transmitting enabling signal interface. An MCU can convert functions of a first level conversion chip and a second level conversion chip by controlling the high and low levels of the mode switching signal interface and the first transmitting and receiving control signal interface. The technical effect that a serial port has a plurality of functions is realized, and the technical problem that for realization of multifunctional serial communication, the CPU multiway serial resources need to be consumed is solved.

The invention discloses an intelligently controlled electric curtain. The curtain includes curtain cloth, an action module, a solar charging module, a light control module and a curtain box. The action module includes a track, a synchronous belt and a transmission mechanism. The lower end of the track is connected with a pulley and dossal hanging wheels, the dossal hanging wheels are connected with the curtain cloth, and the pulley is connected with the dossal hanging wheels; the solar charging module includes a solar panel, a boost module and a storage battery; the solar panel is attached tothe outer side face of the curtain box, the solar panel is connected with the boost module, the boost module is connected with the storage battery, and the storage battery is connected with the transmission mechanism; the light control module includes an intelligent main engine and a light sensing component, the intelligent main engine includes an optical signal segmentation module and a control module, and the light sensing component is connected with the optical signal segmentation module, and the control module controls the transmission mechanism. Solar energy is effectively collected in areasonable way, opening and closing of the curtain can be effectively controlled according to the actual condition of the environment, and great convenience is provided to people's life.

The invention provides an information processing method which solves the technical problem that an intelligent television switches interface states only through hardware buttons in the prior art, and achieves the technical effect of switching the interface states through software operation. The information processing method comprises the steps of obtaining a first current position of a corresponding operation cursor, on a display unit, of a remote control device when a first interface is shown on the display unit, wherein the first interface comprises one or more first interactive objects; judging whether the first current position is located in a preset area of the display unit or not, and obtaining a first judgment result; when the first judgment result shows that the first current position is located in the preset area, controlling a second interface on the display unit to be switched from a first state to a second state different from the first state. The invention further provides a first electronic device carrying out the information processing method.

The invention relates to a data transmission method and device, a storage medium and an electronic device, and the method comprises: a first network device can transmit a business request message to aserver after receiving the business request message transmitted by a terminal, and the service request message comprising the access address information of a target service requested by the terminal;receiving a data packet of the target service sent by the server through second network device according to the access address information; determining a target data transmission mode of the data packet, the target data transmission mode comprising a multicast transmission mode or a unicast transmission mode, the target data transmission mode being determined by the first network device accordingto the number of terminals requesting access to the target service within a first preset time period; or the first network device determining according to the transmission mode indication informationsent by the second network device; and sending the data packet to the terminal through the target data transmission mode.

The invention relates to a waterproof box-type transformer station with a heat dissipation function. The waterproof box-type transformer station comprises a base and a box body and further comprises awaterproof mechanism and two ventilation mechanisms. Each ventilation mechanism comprises a ventilation component, a filter screen, an ash removing component and two support plates. The ventilation component includes a driving unit, a moving plate and a plurality of ventilation plates. The waterproofing mechanism comprises four lifting assemblies. Each lifting assembly comprises a power unit, a lifting plate and a support column. According to the waterproof box-type transformer station with the heat dissipation function, the ventilation mechanisms can open or close a vent, achieve a functionof heat dissipation, prevent excessively high temperature inside the box body from affecting the operation of the internal electronic components, and improve the safety of the box-type transformer station; the waterproof mechanism can raise the main body and prevents accumulated water from entering the box body and further affecting the operation of the electronic components.

The invention discloses a control device for realizing fast switching of television channels and television applications, wherein the control device is used for solving the technical problem of inconvenience in switching between the television channels, between the television applications and between the television channel and the television application in the prior art. The device comprises a fixed storage unit, a dynamic storage unit and a switching control unit, wherein the fixed storage unit is used for storing M sets of channel data corresponding to M television channels, and transmitting the M sets of channel data to a display control unit of a television set, thereby making the display control unit control the television set to display the M sets of channel data on a signal source menu; the dynamic storage unit is used for storing N sets of application data corresponding to N television applications, and transmitting the N sets of application data to the display control unit, thereby making the display control unit control the television set to display the N sets of application data on the signal source menu; and the switching control unit is used for receiving and executing a switching control instruction for the M sets of channel data and N sets of application data, thereby controlling the television set to switch to other television channel or television application from the current television channel or television application.

The invention discloses an air conditioner indoor unit and a control method thereof, and relates to the technical field of air conditioners. The temperature difference between outdoor fresh air entering a room and the indoor air can be reduced when the indoor and outdoor temperature difference is large while the content of carbon dioxide in the indoor air can be reduced, and the discomfort of a user when the fresh air enters the room is prevented; and the air conditioner indoor unit comprises a fresh air duct, an indoor air duct, an induced air duct, an induced draft fan and an air outlet ductwhich are arranged in a shell of the air conditioner indoor unit, wherein the induced draft fan is arranged in the induced air duct, the induced air duct is provided with a first opening and a secondopening, the fresh air duct communicates the first opening with the outside, the indoor air duct communicates the first opening with the indoor room, and the air outlet duct communicates the second opening with the indoor room.

The invention discloses a dual-fuel automobile fuel feed control method and system and belongs to the technical field of vehicle control. The method includes the steps that when an engine is in a gas combustion state, an electronic control unit detects the working condition of a pressure sensor; when the pressure sensor works normally, the electronic control unit receives a pressure signal input by the pressure sensor, wherein the pressure signal is used for representing the value of pressure in a fuel gas cylinder; when the time in which the value of the pressure in the fuel gas cylinder is continuously smaller or equal to a preset pressure valve is longer than or equal to a preset duration, the engine is controlled through the electronic control unit to be switched to an oil combustion state. According to the method, fuel switching control can be achieved accurately according to the allowance of gas in the fuel gas cylinder so that frequent oil and gas switching caused by signal fluctuation occurring when high pressure of the gas cylinder gets close to and quits a boundary point can be avoided.

The invention discloses a circuit for adjusting grid electrode opening voltage. The circuit for adjusting the grid electrode opening voltage comprises a signal source, a feedback network module, a voltage conversion module and a charging and discharging module, wherein input voltage of the signal source and feedback voltage signals of the feedback network module are input into the voltage conversion module, the voltage conversion module carries out voltage boosting conversion on the input voltage and the feedback voltage signals to obtain output voltage, and the charging and discharging module charges and discharges electricity through the output voltage and power source voltage and adjusts the grid electrode opening voltage. The invention further provides a method for adjusting the grid electrode opening voltage based on the circuit, and the grid electrode opening voltage is adjusted indirectly by adjusting the ratio of feedback resistance in a feedback network. The feedback voltage signals output by the feedback network serve as input, then converted voltage is used for periodic conduction of an MOS pipe, and further a pump capacitor is charged and discharged. The charging energy of a charge pump in a charge pump negative feedback system is equal to the energy consumed by loads, and unnecessary loss and consumption are reduced.

The invention relates to an all-weather energy-saving ventilating window for a building curtain wall. The window comprises upper, middle and lower parts which are fixed together with wall bodies of a building by window frames, wherein the middle part is provided with a fixed landscape window or horizontal pulled semi-open window; the upper part is provided with a first window which can be opened outwardly and a second window which can be opened inwardly; and the lower part is provided with an inwardly opened third window and an outwardly opened fourth window. A method for controlling the indoor temperature by adopting the all-weather energy-saving ventilating window is characterized by controlling opening and closing of each window to realize different aims according to difference of seasons and requirements such as the requirement for warming, cooling or heat insulating. The all-weather energy-saving ventilating window has the following advantages: the all-weather energy-saving ventilating window has all-weather condition adaptability, realizes zeroenergy passive environment control, can operate in a full-sealed manner, is pollution-free and noise-free, is suitable for all types of buildings (especially super-high-rise buildings) and can realize full-automatic intelligent control.

The invention relates to a wireless smart socket-based power management system, which comprises a control module, a WIFI module, an infrared receiving module, a switch module and a socket interface which are integrated into a socket body, wherein the control module is connected with the WIFI module, the infrared receiving module and the switch module; 220V electric supply is connected to the socket interface through the switch module; the WIFI module communicates with a user terminal through a cloud server; a user transmits a control instruction to the control module through the user terminal or a remote controller; and the control module controls on/off of the switch module according to the control instruction, and also forwards state information of the switch module to the user terminal through the WIFI module, thereby controlling opening and closing of an electric appliance connected to the socket interface. The wireless smart socket-based power management system is simple and convenient to operate, the service lifetime of the electric appliance can be prolonged; the power is saved; and control can also be achieved in a broken network.

The invention, which belongs to the technical field of sewage detection, in particular relates to an automatic sewage water quality detector comprising a substrate, a detection module, a controller and a motor. The detection module includes an impeller, a cylinder, a screw, a screw sleeve, a piston plate, an auxiliary moving unit, a PH detecting module and a temperature detecting module. The impeller is mounted at one side of the substrate; the cylinder is installed at the intermediate position on the substrate and a through hole is arranged at the bottom of the cylinder; a drain pipe is arranged on the side wall of the top of the cylinder; and the other end of the drain pipe faces the impeller arranged below the drain pipe. The vertical screw is fixedly connected below the motor. A switchunit is arranged in the through hole. The screw sleeve is connected to the screw in a rotating manner; and the piston plate is fixedly connected to the outer ring of the screw sleeve. The automatic sewage water quality detector having a simple structure is operated conveniently. On the basis of cooperation of the detection module and the auxiliary moving module, the water quality detector moves freely to realize multi-point detection and comparison, so that the accuracy of the detection data is improved.