205results about How to "Stable working voltage" patented technology

The invention discloses a transition metal composite oxide catalytic material and a microwave preparation method thereof, can output larger working voltage under higher current density, and has simple preparation method, easily controlled preparation process and rich raw material resources. The preparation method comprises the following steps: taking the nitrates of two transition metals according to the stoichiometric ratio of two metal elements, adding distilled water to prepare a solution, adding carbon black, stirring for reaction, and centrifuging to obtain the precipitate; washing the precipitate; drying at 50-80 DEG C and pulverizing to obtain a precursor, wherein the mass ratio of the transition metal composite oxide to the carbon black is 6:4, the A transition metal is one of Co, Mn, Fe and Ni, and the B transition metal is one of Co, Mn and Fe; and calcining the precursor by microwave to obtain the transition metal composite oxide catalytic material. The microwave calcining method of the invention has simple process and high efficiency, and the prepared spinel has a nano crystal form, small particle size and even distribution.

The invention discloses an impulse type low-power consumption drip irrigation automatic control device, comprising a controller, a timer, an impulse type magnetic valve, a battery and a knob instruction input device, wherein the timer and the magnetic valve are connected with the controller respectively; the battery is connected with the controller, the timer and the magnetic valve respectively; and the instruction input device is connected with the controller and controls the drip irrigation interval period, start time and drip irrigation time by the controller to drive the power on / off states of the magnetic valve so as to realize automatic timing control on drip irrigation. In addition, the invention also discloses a low power consumption drip irrigation automatic control method.

A light emitting device is disclosed. The light emitting device comprises a contact layer and an oxide transparent layer located directly on the contact layer. The contact layer has a stacked structure formed by alternately stacking a plurality of nitride semiconductor layers having a wider bandgap and a plurality of nitride semiconductor layers having a narrower bandgap.

The invention discloses high-voltage switch contact temperature online monitoring device and method thereof. The high-voltage switch contact temperature online monitoring device comprises an emitting part power supply circuit, a temperature acquisition circuit, an emitting part microprocessor, a wireless emission circuit, a wireless receiving circuit, a receiving part microprocessor, a receiving part display circuit and a receiving part power supply circuit. When the high-voltage switch contact temperature online monitoring device is in use, the temperature acquisition part and an external power supply are not necessary to be connected, and energy is directly acquired on a high-voltage bus by utilizing an electromagnetic field coupling method to provide consistent electric energy for a collector. By adopting small CT and magnetic saturation technologies, an emitting part power supply can acquire stable voltage output in a wider current range (50-5000A). Wireless emission adopting micro-power emission with an open frequency band can not generate interference in other equipment, and a high-voltage temperature monitoring end and a display instrument end are fully separated. The temperature acquisition part of the high-voltage switch contact temperature online monitoring device is in cast with epoxy into clamp kits of different specifications so as to suit contact switches of different specifications and different shapes.

The invention discloses a method for sealing a cylindrical zinc-air battery, which comprises the following steps of: prefabricating a stainless steel battery case with air holes, adding an adhesive, a modified material and a conductive agent according to a weight ratio, performing heat seal and crushing to prepare modified low-pressure polyethylene or polytetrafluoroethylene waterproof powder; preparing a catalyst mixed material according to a weight proportion; adding aqueous solution into the mixed material, mixing and aggregating to form slurry, and drying; adding an organic solvent into the dried mixture, performing repeated rolling fibration, and finally rolling into the specific thickness; preparing a catalytic membrane, and preparing the catalytic membrane into an air electrode in an embedded air electrode molding mold; and dip-coating an alkaline resisting glue line on the edge of the air electrode, drying to form a thin sealing film, and packaging into the stainless steel battery case. By adopting a heating and mould pressing mode, the air electrode of the cylindrical battery is directly molded and produced, a gluing mode is not used at all, and the sealing problem of the cylindrical zinc-air battery can be radically solved.

The present invention discloses a crystal oscillator. The crystal oscillator comprises: a crystal, an oscillating circuit, a first driving circuit, and a second driving circuit, wherein the oscillating circuit comprises a first oscillating transistor and a second oscillating transistor; the first oscillating transistor and the second oscillating transistor are used for providing transconductance for oscillation starting of the crystal and maintenance of oscillation; the first driving circuit is used for generating a stable reference current; and the second driving circuit is used for supplyingan operating voltage to the oscillating circuit, and enabling the operating current of the first oscillating transistor and the second oscillating transistor to be a stable current according to the reference current; and the operating voltage is used to control the first oscillating transistor and the second oscillating transistor to operate in a subthreshold region.

Disclosed are a power supply apparatus for an LED lighting and an LED lighting apparatus using the power supply apparatus. The LED lighting apparatus includes a power source unit configured to supply a rectified voltage, a voltage converter configured to include at least one first inductor and to convert the rectified voltage, an auxiliary coil configured to include a second inductor and to supply a detection voltage corresponding to the current of the first inductor of the voltage converter, a controller configured to control the current of the voltage converter using a driving pulse generated in response to a control signal and a sensing voltage, and a voltage regulation circuit configured to regulate the detection voltage and to supply the regulated voltage as an operating voltage for the controller.

The invention discloses a vehicle safety protection method and device. The vehicle safety protection method comprises the steps that threshold values are set; the travelling speed of a vehicle, the relative speed and the vehicle distance between the vehicle and a front vehicle, and surrounding obstacles are detected and compared with the set threshold values; whether detected data are larger thanthe set threshold values or not is analyzed; if the detected data are larger than the set threshold values, alarm is issued; and when a driver does not take deceleration or acceleration braking measures within 0.8 second, a system conducts emergency braking and increases the distance between the vehicle and the front vehicle or a rear vehicle in a forced mode. The steps are matched with an information acquisition module, an information processing and control unit, an execution module, a storage module and a power supply unit in the device to be implemented, the travelling speed of the vehicleis controlled within the safe travelling speed range, meanwhile, the vehicle is all-dimensionally monitored in real time, the timely alarm function is provided, the rear-end accident rate is effectively decreased, and when the two vehicle collide, the vehicle active safety protection device is automatically started, so that the travelling safety is improved all-dimensionally.

An electromagnetic solenoid having an electromagnetic coil, a fixed iron core, a movable iron core, and a spring coil. The spring coil, arranged between the fixed and the movable iron core, supplies a spring force to the movable iron core toward an opposite direction of the fixed iron core along the axial direction. A magnetic attraction surface and a fitting part are formed in at least one of the fixed iron core and the movable iron core. The magnetic attraction surface is contacted with the fixed iron core when the movable iron core reaches the fixed iron core. An outer peripheral surface of the fitting part, apart from the magnetic attraction surface by a predetermined distance along the axial direction, is engaged with the spring coil. The most outer peripheral part of the magnetic attraction surface is positioned inside rather than the most outer peripheral part of the fitting part.

The invention relates to an open type channel management system and method. The open type channel management system comprises an infrared bijection sensing module, a radio frequency identification module, a control communication module, an alarming module and a power supply module, and is characterized in that the infrared bijection sensing module and the radio frequency identification module are arranged at an open type channel; the infrared signal output end of the infrared bijection sensing module is connected with the infrared signal input end of the control communication module; the label signal output end of the radio frequency identification module is connected with the label signal input end of the control communication module; the radio frequency identification module is provided with a radio frequency signal emitting end and a label signal input end; the control signal input end of the radio frequency identification module is connected with the control signal output end of the control communication module; the infrared bijection sensing module is used for judging whether a person passes through a certain region and judging an in or out direction of the person, and consists of a plurality of infrared bijection sensors. The open type channel management system has the beneficial effects that the in or out directions of persons can be uniformly managed, information can be identified and uploaded in a relatively far distance, and the management system and the management method are suitable for being used in various places.

The invention discloses a preparation method of a carbon-coated sodium iron phosphate electrode material with a hollow structure, and relates to a preparation method of an electrode material. The invention solves the problem that the existing NaFePO4 has low electron conductivity and ion diffusion coefficient, so that the NaFePO4 has poor sodium rate capability when being used as the sodium ion battery positive electrode material. The preparation method comprises the following steps: 1, dissolving an iron source, a sodium-containing phosphorus source and a nitrogen-containing organic polymer compound in water to obtain a mixed solution; 2, magnetically stirring to obtain a uniformly mixed solution; 3, keeping the temperature of the uniformly mixed solution until water is completely evaporated to obtain uniformly mixed powder; 4, carrying out heat treatment in a tubular furnace. The preparation method is used for preparing the carbon-coated sodium iron phosphate electrode material withthe hollow structure.

An intelligent LED street lamp, which integrates codec technology, power line carrier technology, electric fan air cooling, semiconductor refrigeration technology, and automatic voltage regulation (light) technology, effectively solves the problem of calling and answering LED street lamp terminals; effectively It perfectly solves the automatic voltage regulation (light) of LED street lamps, and selectively switches the lights; effectively solves the problem that the staff can know the LED street lamps hundreds of meters away without going out in the office without patrolling. situation.

The invention belongs to the technical field of electric double layer capacitor manufacturing, and relates to an electrode plate of an electric double layer capacitor (EDLC) and a preparation method thereof. According to the electrode plate of the EDLC and the preparation method thereof, conductive carbon granules are embedded in one surface or two surfaces of a current collector, and the surface is bonded with electrode material through conductive adhesive; the electrode material is formed by electrode active substance, conductive agent and adhesive agent; the conductive adhesive is formed by conductive agent and rubber, and the rubber is capable of preventing current collector from being corroded electrochemically in electrolyte; and the current collector is made of aluminum foil as thick as 20um-30um, and the conductive carbon granules are embedded on the surface of the current collector with a high purity graphite bar by means of electrical spark discharge. The electrode active substance is active carbon like asphalt base ball, the specific surface area of the electrode active substance is larger than or equal to 2000m<2> / g, the grain size is 10um-23um, and the bore diameter is 1nm-3nm. By means of the electrode plate of the EDLC and the preparation method thereof, internal resistance of the EDLC is decreased, the electrochemical corrosion resistance of the EDLC current collector is improved, service life of the EDLC is prolonged, and working voltage is stabilized.

The invention discloses an automatic control apparatus and control method of a hydrogen plasma electrode. The apparatus comprises at least one telescopic apparatus (1) used for driving electrodes, atleast one servo motor (2) for controlling the corresponding telescopic apparatus (1), a voltage transmitter (3) for detecting voltage between electrodes, and a control unit (4) connected with the voltage transmitter (3) and the servo motor (2) for controlling the servo motor (2) according to an indicating signal of the voltage transmitter (3). By virtue of the automatic control apparatus and control method of the hydrogen plasma electrode disclosed in the invention, the distance between a positive electrode and a negative electrode can be dynamically adjusted in the working processes of the electrodes, working voltage stability between the electrodes is ensured, the reaction efficiency is improved, and energy loss is lowered.

The invention discloses a magnesium alloy storage battery which comprises a battery shell, partition layers and an upper cover. The interior of the battery shell is divided into a plurality of reaction chambers. Each reaction chamber is covered with the corresponding partition layer which is provided with a plurality of water inlets. The upper cover is matched with the battery shell and provided with a water injecting hole. In each reaction chamber, a tinplate sheet is placed on one side of the reaction chamber to serve as a battery cathode, the surface of the tinplate sheet is wrapped by a conductive electrode film, a magnesium plate is placed on the other side of the reaction chamber to serve as a battery anode, the surface of the magnesium plate is wrapped by glass fiber partition plate paper, and the space between the cathode and the anode is filled with a cathode powder material which is then compacted. Each reaction chamber serves as an independent battery. The cathode plates and the anode plates of the reaction chambers are connected with one another in series or in parallel through conductive rods, and therefore the requirements of different output voltages and different output currents can be met. As a storage type battery, the magnesium alloy storage battery has the storage life of 20 years or more; the magnesium alloy storage battery can be used by injecting clean water or other liquid through the water injecting hole before use and activating the magnesium alloy storage battery for 1 min, and the working voltage is quite stable.

The invention aims to provide an intelligent electromagnetic switch control device for a low voltage power supply system. The intelligent electromagnetic switch control device is characterized by comprising a voltage conversion module and a current conversion module which are in cascade connection, wherein voltage conversion at the former stage adopts a current mode control manner, and working voltage supplied to the latter stage can be flexibly and quickly adjusted to be higher than the input voltage to conduct current monitoring; the latter stage conducts wave chopping on the output voltage at the former stage, and square-wave voltage is obtained at the two ends of an electromagnetic mechanism, so that an electromagnetic switch is subjected to current close-loop control. According to the device, the higher harmonic oscillation problem caused by boost inductive current instability is eliminated through slope compensation; the boosting conversion at the former stage can also play the power factor regulation function to purify a control power supply; through the adoption of the manner that an advanced control algorithm is coordinated with the ontology design of an electromagnetic mechanism, the optimum control duty cycle adjusting mode is automatically searched, and the optimum duty cycle is limited in a certain range, so that the harmonic component of the current in the retention stage is reduced, and the electromagnetic audio noise is reduced.

The invention provides a flash memory device with an abnormal power protection function. The flash memory device comprises a controller, a plurality of flash memories, a switch, a power module and a voltage detection circuit, wherein the voltage detection circuit detects system voltage and outputs an enable signal to the switch to switch on the switch when the system voltage is higher than a voltage threshold, the system voltage is supplied to the power module through the switch, the power module executes a charging procedure through the system voltage and outputs output voltage according to the system voltage, and the output voltage is taken as working voltage of the controller and the flash memories; when the system voltage is lower than the voltage threshold, the voltage detection circuit outputs a disable signal to the switch to switch off the switch, the system voltage is prohibited to be supplied to the power module, and the power module executes a discharge procedure to produce output voltage.

A light emitting device according to an embodiment includes a second electrode layer comprising at least one projection part; at least one current blocking layer on the projection part of the second electrode layer; a second conductive type semiconductor layer on the second electrode layer and the current blocking layer; an active layer on the second conductive type semiconductor layer; a first conductive type semiconductor layer on the active layer; and a first electrode layer on the first conductive type semiconductor layer, at least a portion of the first electrode layer corresponding with the current blocking layer in a vertical direction.

The invention relates to the technical field of automobile electronics, specifically to a method and a device for cleaning up carbon deposited in an automobile engine, wherein the device comprises a sensor, a controller and a pulse generator, wherein the controller is composed of a power circuit, a signal input circuit, a processor and a signal output interface, wherein the signal input circuit, the processor and the signal output interface are orderly connected; the pulse generator is composed of a condition indicator, a pulse circuit and a signal output circuit, wherein the pulse circuit and the signal output circuit are connected with each other; the sensor is connected with the signal input circuit of the controller; and the pulse generator is connected with the signal output interface of the controller. The method and the device provided by the invention can transmit a pulse signal timely according to an operation condition of the engine so as to clean up original deposited carbon of the engine, prevent newly deposited carbon from being generated, ensure a combustion condition is optimal under various conditions, and improve overall performance of entire automobile.

A power supply circuit is constructed by a step-up circuit for receiving an input DC voltage to generate a plurality of output DC voltages, and a plurality of voltage regulators, each powered by two voltages selected from a combination of the output DC voltages and the ground voltage. The difference between the two voltages of each of the voltage regulators are substantially the same, to stably operate the voltage regulators.

Disclosed is a method of online monitoring for high-voltage switch contact temperature rise. Equipment used by the method includes a transmitting part power circuit, a temperature acquisition circuit, a transmitting part microprocessor, a wireless transmitting circuit, a wireless receiving circuit, a receiving part microprocessor, a display circuit and a receiving part power circuit. The transmitting part power circuit comprises a current induction coil and a circular core, the core is sleeved on a conductor of a switch contact to be measured, and induction current of the current induction coil is used to power the temperature acquisition circuit, the transmitting part microprocessor and the wireless transmitting circuit. Temperature signals acquired by the temperature acquisition circuit are processed and are then transmitted by the wireless transmitting circuit. The wireless receiving circuit receives the signals. After the microprocessor processes the signals, the display circuit displays measured switch contact temperature. When temperature rise exceeds a set upper limit, alarm signals are sent out. Failure of the high-voltage switch contact can be monitored effectively, and safe operation of a power system can be guaranteed effectively.

The invention relates to electromagnetic heating cooking equipment capable of preparing soybean milk. The electromagnetic heating cooking equipment comprises a microwave cooker, wherein the microwave cooker comprises an operation panel, an electric control device and an excitation device capable of generating a high-frequency alternating magnetic field; an electromagnetic heating device also comprises a soybean milk machine which is matched with the microwave cooker; the soybean milk machine comprises a handpiece, a cup body, a motor and electromagnetic heating coils; a control signal is transmitted between the microwave cooker and the soybean milk machine through a signal transmission device; and a magnetizing device which can acquire electric energy by electromagnetically coupling with the excitation device is arranged on the cup body. When the magnetizing device is connected with the electromagnetic heating coils, the electric energy for heating and boiling is provided for the soybean milk machine; and when the magnetizing device is connected with the motor, the electric energy is provided for the soybean milk machine to crush beans and prepare the soybean milk. The electromagnetic heating cooking equipment has the advantages of multifunction, convenience for use and high safety performance.

The invention discloses a powdery material level detection and control circuit. In the powdery material level detection and control circuit, a power module provides work voltage needed by a weighing detection circuit, an air pressure detection circuit and various modules. Signals detected by an external detection circuit are transmitted into a controller, the controller carries out data processing on values transmitted back by three sensors in the weighing detection circuit, and the height of materials in a container at present is obtained. Meanwhile, the controller produces feedback signals to be transmitted back to a valve positioning device on a material inlet, adjustment is carried out on flow, and therefore the materials can be stacked to reach a preset height accurately. Meanwhile, the controller can transmit the height of the materials in the container to a nixie tube of a display module, so the fact that real-time material height information is provided for operating staff is facilitated. The powdery material level detection and control circuit is strong in interaction function, and facilitates good operation of the operating staff.

The invention relates to a solar battery, and aims at providing a solar battery for staggered power generating in situ. The battery takes non-woven fabrics manufactured by an anion-exchange membrane or polypropylene fibre as a septum and takes aqueous alkali as electrolyte; the battery takes a conducting polymer modified carbon-based cobalt hydroxide catalyst loaded on an electrode matrix as an anode and takes a water splitting hydrogen storage material as a cathode. The water splitting hydrogen storage material includes a titanic type hydrogen storage alloy as a matrix and a membrane adhered on the surface of the matrix and consisting of anatase titan TiO2 and transition metal particles through mixing. The solar battery for staggered power generating in situ realizes the photoelectric conversion, but also can store power energy, and can implement staggered power generating in situ. Meanwhile, the solar battery for staggered power generating in situ changes the current situation that the traditional solar battery can only implement energy conversion, but can not implement energy storage, expands the application scope of the solar battery, and is one revolution for solar battery technology.

A voltage regulator circuit comprises a transformer T1, a diode D1 and a diode D3, a voltage-regulator tube D2, an audion Q1, a resistor R1 and a resistor R2, a capacitor C1and a capacitor C2. The transformer T1 comprises a primary winding T1a, a secondary winding T1b and an auxiliary winding T1c. One end of the auxiliary winding T1c is grounded and the other end is connected with the positive pole of the diode D1 through the resistor R1, the negative pole of the diode D1 is connected with the collector electrode of the audion Q1, the emitting electrode of the audion Q1 is connected with the positive pole of the diode D3, and the negative pole of the diode D3 is connected with the output end of the voltage regulator circuit. The positive pole of the capacitor C2 is connected with the negative pole of the diode D1, the negative pole of the capacitor C2 is connected with earth. The negative pole of the voltage-regulator tube D2 is connected with the base electrode of the audion Q1, the positive pole of the voltage-regulator tube D2 is grounded. The resistor R2 is connected in parallel between the collector electrode of the audion Q1 and the negative pole of the voltage-regulator tube D2. The positive pole of the capacitor C1 is connected with the negative pole of the diode D3, the negative pole of the capacitor C1 is grounded. The voltage regulator circuit can output more smooth voltage signals.

The invention discloses a bypass module for a power unit of a high-voltage frequency converter. The bypass module comprises a bypass driving circuit used for driving a bypass contactor switch of the power unit; the bypass module further comprises a bypass state detection circuit, a bypass failure feedback circuit and a communication fault feedback circuit; the bypass state detection circuit is used for detecting whether a bypass contactor is successfully driven or not; the bypass failure feedback circuit is used for feeding back a bypass failure signal detected by the bypass state detection circuit to a main control system of the high-voltage frequency converter; and the communication fault feedback circuit is used for feeding back a signal of a bypass optical fiber communication fault tothe main control system of the frequency converter in time. A triode in the bypass driving circuit works in a saturation region; a collector and an emitter are conducted; a relay obtains electricity to be closed; and that a bypass signal is already sent out is displayed in time through a first signal loop, so that the bypass driving circuit has the advantages of being simple in structure, low in cost and high in reliability.

The invention discloses an LED chip with an ITO thin film structure and a preparation method of the LED chip, and belongs to the field of semiconductor light-emitting diodes. The method comprises the following steps: firstly, fabricating an epitaxial wafer of the light-emitting diode; fabricating a patterned dielectric film layer on the epitaxial wafer and fabricating the patterned ITO thin film layer and p-GaP window layer in an etching manner; and fabricating a metal electrode layer on the patterned ITO thin film layer and p-GaP window layer. The metal electrode layer comprises a main electrode and an extended electrode. The patterned ITO thin film layer and p-GaP window layer are adopted as contact layers; and the main electrode as a bonding pad is connected to the p-GaP window layer; and the extended electrode is connected to the ITO thin film layer. The adhesiveness of the overall metal electrode layer is improved; a stable working voltage of a light-emitting device is ensured; the bonding wire reliability of a product is improved; and the quality and the yield of the product are greatly improved.

A power supply device, in particular a portable water battery component and a water battery device comprising same. The water battery component comprises a carbonized cloth constituting a positive electrode, a positive electrode lead-out electrode electrically connected to the carbonized cloth, a salt-containing cloth closely connected to the carbonized cloth; a absorbent paper closely connected to the salt-containing cloth, a negative electrode metal piece closely connected to the absorbent paper and constituting a negative electrode, a negative electrode lead-out electrode electrically connected to the negative electrode metal piece, and a heat-shrinkable tube compressing the carbonized cloth, the positive electrode lead-out electrode, the salt-containing cloth, the absorbent paper, the negative electrode metal piece, and the negative electrode lead-out electrode against each other. The water battery device comprises a shell, wherein the shell is internally provided with one or more of the foregoing battery components, and the shell is provided with water injection holes for injecting water into the shell; thus the absorbent paper of water battery component absorbs water.

The invention discloses an LED lamp strip energy-saving control system employing multi-circuit processing. The LED lamp strip energy-saving control system comprises a single chip microcomputer, a sound sensor, a buzzer, a transistor voltage filtering circuit, a signal receiving and processing circuit, a dimming control circuit, a brightness sensor, a power supply and an LED lamp strip, wherein the sound sensor, the buzzer, the transistor voltage filtering circuit, the signal receiving and processing circuit and the dimming control circuit all are connected with the single chip microcomputer; the brightness sensor is connected with the signal receiving and processing circuit; the power supply is connected with an input end of the transistor voltage filtering circuit; the LED lamp strip is connected with the diming control circuit; and the signal receiving and processing circuit comprises a signal receiving circuit and a signal processing circuit. The LED lamp strip energy-saving control system is used for contacting an acoustic signal of an indoor sound through the sound sensor and collecting an indoor environment brightness signal through the brightness sensor; meanwhile, the acoustic signal and the brightness signal are analyzed and treated through the single chip microcomputer; and automatic adjustment of the brightness and automatic opening and closing of the LED lamp strip are achieved, so that the electric power resource is effectively saved.