67results about How to "Will not affect working status" patented technology

The invention discloses a multi-path output flyback power supply with an output short-circuit protection function. The power supply comprises a transformer, a main switch, a pulse width modulation (PWM) control circuit, an output rectifier filter circuit and an output short-circuit protection circuit, wherein the transformer is provided with a primary winding and a plurality of secondary windings; the main switch is connected with the primary winding of the transformer; the PWM control circuit controls the main switch; the output rectifier filter circuit is connected with the secondary windings of the transformer and a load; and the output short-circuit protection circuit is connected with the output rectifier filter circuit, and comprises an operational amplifier, a metal oxide semiconductor (MOS) tube, a first resistor, a second resistor, a third resistor, a first capacitor and a power circuit for providing working power and reference voltage for the operational amplifier. The invention also discloses a short-circuit protection method for the flyback power supply. According to the output short-circuit protection circuit and the short-circuit protection method, a short-circuit protection function for each path of output of the flyback power supply can be independently realized, namely influence on the working state of other output circuits is avoided even though the output of one path is short-circuited.

The invention provides a circuit and a method used for improving dynamic response speed of a PFC (power factor correction). The circuit comprises a high-pressure detecting module, a low-pressure detecting module, and an acceleration module, wherein the high-pressure detecting module is used for triggering the acceleration module to conduct when the maximum value of output voltage of a PFC bus is detected to be greater than a preset upper limit value; the low-pressure detecting module is used for triggering the acceleration module to conduct when the minimum value of the output voltage of the PFC bus is detected to be less than a prearrangement lower limit value; the acceleration module comprises a speed-up capacitor and an acceleration resistance connected in series; and the acceleration module is connected between an output end of the output voltage of the PFC bus and a feedback signal end of a voltage ring in a PFC control circuit, and is used for increasing a pole and a zero point for voltage; when the output voltage of the PFC bus is overpressured or undervoltage, and the circuit can trigger the acceleration module to conduct so as to act on the voltage ring to accelerate the response speed of a loop circuit. The circuit and the method provided by the invention can promote dynamic properties, meanwhile, an operating mode of a main circuit in steady state can not be influenced, and a dynamic adjusting point is accurately set and the discreteness is small.

The invention discloses a control system of a logging drilling sidewall coring tool. The control system comprises a drilling coring ground control box, a winch depth device, a variable frequency power source, a downhole instrument circuit part and a downhole instrument hydraulic part, wherein data acquisition and feedback control are performed on the coring tool through the drilling coring ground control box, various states of a downhole instrument can be detected in time through the downhole instrument circuit part, the power supply state of a downhole motor and the power supply state of the downhole instrument are monitored through a sensor, and the downhole motor can be adjusted and controlled by processing acquired data and controlling the variable frequency power source. According to a control method, automatic control over coring of the coring tool is achieved through the ground control box, an execution motor can be continuously started, a backup arm expands, the stretching displacement of a punch pin is minimal, the pressure of a second pump is maximal, a hydraulic motor rotates, a drill bit stretches out, the hydraulic motor stops rotating when the drilling displacement reaches the core breaking position, and a series of continuous actions that the core breaking drill bit retreats and is taken back is completed.

The disclosed real-time online circuit monitor and data extraction method and device based on 2M data comprise: taking CRC to the received 2M signal, decoding the signal by corresponding clock signal, and buffering the decoded data; analyzing the alarm and performance of transmit line, extracting data frame from buffered data as set filter condition to send to the network monitor center for further analysis and corresponding treatment; recoding data as the former received data frame format for transmit. This invention can ensure monitor quality accurately and makes convenience to user.

The invention relates to an engine heat management system and a charging vehicle comprising the same. The engine heat management system comprises a cooling loop used for cooling an engine when the temperature of the engine is higher than first preset temperature. The cooling loop comprises a first cooling system and a second cooling system, and the second cooling system and the first cooling system are connected into the cooling loop in series or in parallel. The engine heat management system can meet the charging requirement of the charging vehicle under various working conditions, and it isensured that the charging vehicle runs safely, efficiently and economically.

The invention provides a linear high-efficiency constant-current no-stroboflash LED driving circuit and a driving method thereof. The linear high-efficiency constant-current no-stroboflash LED drivingcircuit comprises the components of a voltage input module, an LED load, a first energy storage capacitor, a charging module and a constant-current control module. One end of the charging module is connected with the output end of the voltage input module, and the other end is connected with the first energy storage capacitor. The charging module is suitable for charging the first energy storagecapacitor when the input voltage is higher than the voltage of the first energy storage capacitor, and the average value of the charging current of the charging module in different input voltage periods is constant. The first energy storage capacitor is connected with the LED load through the constant-current control module, and is suitable for performing constant-current discharging on the LED load through controlling by the constant-current control module, thereby ensuring no ripple in current of the LED load. The driving circuit of the invention can realize constant output LED current in arelatively wide input voltage range and furthermore can realize high efficiency on the condition of high input voltage, and furthermore no strokoflash in output is realized.

The invention provides a method for removing blast furnace shaft wall accretion. The method comprises the following steps: keeping the basic smoothness of the furnace operating conditions, and controlling the adequate furnace temperature; adding a right amount of clean coke into the furnace to enhance the fuel ratio of the regular burden; carrying out descending stockline operation; carrying out blast furnace staying; plugging part of air ports with mud, and blasting to perform production; and breaking the sludge-plugged air ports to restore the regular production of the blast furnace. The method can expose the slag crust on the furnace shaft inner wall, and has great heat flow scouring actions on the slag crust, so that the slag crust can be removed reliably and thoroughly. The method has the advantages of small fluctuations of furnace operating conditions and short time consumption for slag removal.

The invention discloses a software fault acquisition and analysis method and system, and the method comprises the steps: detecting a running state of a target application program, and generating fault data of the target application program when monitoring that the running state of the target application program is abnormal; acquiring operating environment information, configuration parameter information and log information of the target application program, matching the fault data and sending the data to a server; after the server receives and stores the fault related data, on one hand, sending a fault alarm, on the other hand, carrying out fault diagnosis and analysis by the acquired fault data and inferring related information, giving possible fault causes and corresponding fault solutions; archiving and analyzing fault data information. By big data comparison and analysis and analysis of fault occurrence frequency and fault occurrence time and place information, the damage degree of the fault is judged, and a fault analysis report is sorted out, so that a subsequent fault problem with a relatively high disaster degree can be preferentially handled by a manual or intelligent algorithm.

An embodiment of the invention discloses a load distribution method for parallel application lithium battery packs in a power supply system, and relates to the technical field of power electronics, and can lower the maintenance cost of the battery packs in the power supply system. According to the load distribution method, a lithium battery pack comprises two sub battery packs; each sub battery pack comprises a charging electrode, a discharging electrode and a common electrode, wherein a charging positive electrode is configured with a charging control switch with one-way conductive characteristic, and the current flows to the battery pack; a discharging positive electrode is configured with a discharging control switch with one-way conductive characteristic, and the current flows to an external load; each sub battery pack of the lithium battery pack is configured with a respective battery management system (BMS); and the BMSs are in mutual communication by adopting a CAN2.0B protocolfor exchanging the operation control information of each sub battery pack and realizing load distribution (sub battery pack "discharge" or "standby" state conversion control) of the sub battery packs.The load distribution method is applicable to parallel application battery packs in the power supply system.

The invention relates to a tower-type solar photo-thermal power generation system adopting a fused salt working medium. The system comprises a solar heat collection device used for collecting solar thermal energy, a heat exchanger connected with the solar heat collection device and used for producing overheated saturated steam and a thermal power conversion device connected with the heat exchanger and used for converting the overheated saturated steam to electric energy. The solar heat collection device comprises multiple tower-type photo-thermal modules. The multiple tower-type photo-thermal modules include the tower-type photo-thermal modules B with distributed heat storage and adopting fused salt as a heat working medium. By means of the tower-type photo-thermal modules B with distributed heat storage and adopting the fused salt as the heat working medium, the power generation efficiency of a power station can be greatly improved, and the energy utilization rate is increased. By means of the modularized solar heat collection device, the construction process of the power station can be simplified, the construction period can be shortened, and the design and investment cost of the power station can be further reduced.

A position indicating device of a valve body dynamic sealing ring is provided with a circular tube shell provided with a front end cover and a rear end cover, a communicating shaft which passes through the front and the rear end covers and is respectively connected with a front rocker arm and a rear rocker arm at the two ends, a sliding block articulated at the outer end of the front rocker arm, a flushing pipe that is connected between the front end cover and the rear end cover, a short circular tube that is provided with a radial support saddle at the rear end and is connected with the rear end cover, a cambered long narrow hole arranged on the support saddle, a round orifice arranged at the outer end of the rear rocker arm, a threaded rod connected between the cambered long narrow hole and the round orifice arranged at the outer end of the rear rocker arm, and a proximity switch that is arranged between the outer end of the rear rocker arm and the support saddle and is respectively corresponding to the on and the off states of the valve body dynamic sealing ring. The position indicating device uses the communicating shaft which is respectively connected with rocker arms at the two ends for transmitting the movement of the valve body dynamic sealing ring, the communicating shaft is arranged in the circular tube shell that is installed in a mounting hole of the valve body, and sealing pairs are respectively arranged between the communicating shaft and the shell and between the shell and the mounting hole; when in use, impurities such as silt and the like in liquid medium can not enter the shell, so that the accurate indication of combination and separation between valve body dynamic sealing ring and a butterfly plate sealing ring is not influenced.

The invention provides a glandless form magnetism-driven juicer with a permanent magnet push-pull structure. The juicer comprises a base, a cup body, a motor arranged in the base, a screw located in the cup body and a cup cover located at the top end of the cup body, wherein an output shaft of the motor is fixedly connected with a magnetic coupler frame; the cup is reversely buckled on the base and the magnetic coupler frame; one end of the screw is connected with the cup cover; the other end of the screw is connected with a bottom shaft; an inner magnetic pole is arranged in the bottom shaft; an outer magnetic pole is correspondingly arranged in the magnetic coupler; when the motor runs, the screw is rotated by magnetic drive between the outer magnetic pole and an outer magnetizer and between an inner magnetizer and the inner magnetic pole, and a protective cover body is also arranged on the bottom shaft and the screw respectively. According to the juicer, the magnetic force of magnetic materials is acted on the radial direction of the screw, so as to drive the screw to rotate; meanwhile, fruit residues can be effectively prevented from entering a bearing area and a magnetizer area by adopting a spiral sealing form.

The invention provides a sensor calibration method, electronic equipment, a medium and a system, and the method comprises the steps: obtaining a first sequence obtained by measuring a first parameter; acquiring a second sequence obtained by measuring the first parameter, wherein the sampling frequency of the second sequence is lower than that of the first sequence; adjusting the second sequence to be aligned with the first sequence by adopting a dynamic time warping algorithm; and correcting the first sequence. According to the method, the sensor does not need to be disassembled, the working state of equipment in the Internet of Things cannot be affected, a calibration element does not need to be additionally arranged in the sensor, and the hardware cost can be reduced.

The invention discloses an engine air inlet pipe. An elastic part is arranged at the bottom of the engine air inlet pipe. The elastic part generates form changes according to the changes of the difference of the pressure inside and outside the engine air inlet pipe, and crushing force is accordingly applied to ice blocks accumulated on the elastic part. The invention further discloses an engine system provided with the engine air inlet pipe. The engine air inlet pipe can effectively crush the ice blocks accumulated to be in large size into small-size ice blocks, and therefore the phenomenon that normal work of other parts of an engine is hindered when the kind of ice blocks get away from the air inlet pipe is avoided, and the running stability and safety of the engine are better ensured. The engine system is good in running stability, high in safety coefficient and long in service life.

The invention discloses a portable fire extinguisher with a voice prompt function. The portable fire extinguisher with the voice prompt function comprises a tank body and a warning device; the warning device comprises a loudspeaker, a control circuit and a detecting part for detecting state changes of the fire extinguisher; the loudspeaker and the detecting part are electrically connected with the control circuit respectively so that when the detecting part detects that the state of the fire extinguisher changes, the loudspeaker can produce a voice prompt. The warning device is installed on the tank body of the fire extinguisher so that the loudspeaker can produce the corresponding voice prompt when the detecting part detects that the state of the fire extinguisher changes, and the problem that existing fire extinguishers can not timely put out a fire when a fire disaster occurs can be avoided.

The invention relates to the PFC circuit technology field and especially relates to a current compensation method of an input capacitor of a PFC circuit, the PFC circuit and a power conversion circuit. The invention discloses the current compensation method of the input capacitor of the PFC circuit, the PFC circuit and the power conversion circuit. The current compensation method of the input capacitor of the PFC circuit comprises the steps that a compensation current icbs is adopted to compensate a current icbb of an input capacitor cbb flowing through an alternating current input end of thepower conversion circuit, wherein the compensation current icbs is sinusoidal current, and a frequency is twice of the frequency of an input alternating current power supply. An influence of a currentphase shift of the input capacitor of the power conversion circuit on the input current can be effectively reduced, a PF value is improved, and a current working state of the circuit is not influenced.

The disclosed improved lamp in use for lamp string includes following parts: shell; base holder; bulb including a pair of leader line of filament; being located at low part of base holder, first separator is extended downwards; a pair of terminal is extended to the shell, two pieces of spring terminal; and supporting block with hollow structure at upper part. Being fixed on the supporting block, two pieces of spring terminal are elastic contacted to each other. The supporting block is fixed inside the shell. The pair of terminal inside the shell is electrically connected to two pieces of spring terminal correspondingly. The supporting seat is extended from bottom of the supporting block. When bulb is put into the shell, low end of the first separator is contacted to or supported by the supporting seat. Second separator is extended from bottom of the supporting block. When bulb is not in socket, circuit is still kept on state. Features are: good safety and easy of assembly.

The invention discloses a keyless system ignition switch. The keyless system ignition switch comprises a rotary knob, a lock cylinder and a lock body, wherein the rotary knob is connected with the lock cylinder which is arranged in the lock body, and a switch assembly and a lock bar which are in transmission through the lock cylinder are further arranged in the lock body. The keyless system ignition switch is characterized in that a pin groove is formed in the lock cylinder, a relay is arranged on the lock body and connected with a pin shaft, and the relay controls the pin shaft to move up and down in the pin groove so that the lock cylinder can be unlocked or locked. The keyless system ignition switch is simple and compact in structure, very high in secrecy, safe and convenient to use, and capable of effectively avoiding traffic accidents caused when locking happens because of error signals and preventing violent opening at the same time.

The invention discloses a vacuum bubble switching mechanism and an on-load tap-changer. The vacuum bubble switching mechanism comprises a guide plate, a switching shifting block, a shifting yoke, a template and two vacuum bubble structures, wherein the switching shifting block is fixed on a sliding plate; the shifting yoke is rotationally connected with the switching shifting block, fixedly connected with the template, and mounted on the guide plate by a bearing; a plurality of arc guide grooves are formed in the template; position lifting devices of the two vacuum bubble structures are arranged in the arc guide grooves, and connected with the tail ends of vacuum bubble moving contacts; the sliding plate makes horizontal step change motion under the action of an external power driving mechanism; the switching shifting block drives the shifting yoke and the template to rotate in a plane; and the two vacuum bubble structures move up and down along the arc guide grooves in the template. The on-load tap-changer adopts the vacuum bubble switching mechanism. According to the vacuum bubble switching mechanism, the template is separated from the sliding plate; slight inclination of the sliding plate cannot influence a working condition of the template and working strokes of vacuum bubbles; and the vacuum bubble switching mechanism has the advantages of low mounting difficulty and high accuracy.

The invention discloses a cleaning device for high temperature flue gas and cleaning fiber balls thereof. The cleaning device comprises a box and fiber ball main bodies arranged in the box, wherein a flue gas inlet is arranged at the front end of the box; a flue gas outlet is arranged at the rear end of the box; a flue gas cleaning chamber is arranged between the flue gas inlet and the flue gas outlet; the flue gas inlet comprises an absorption infiltration layer and a flue gas distributing guiding-in chamber connected with the absorption infiltration layer; the flue gas outlet comprises an absorption exudation layer and a flue gas distributing guiding-out chamber connected with the absorption exudation layer; multiple sets of fiber ball main bodies are distributed in the flue gas cleaning chamber; the multiple sets of fiber ball main bodies are fixed on the corresponding positions through a fixing device. The cleaning device for high temperature flue gas has a simple structure; the implemented and fixed fiber balls are adopted for cleaning; the serious abrasion phenomenon of the fiber balls caused by shaking can be reduced; the adsorption, distribution and guiding processes are added, so that the cleaning effect is promoted, the working efficiency is increased and the operability is strong.

The invention discloses a reader system. The reader system comprises a processor, a data adapter, a power supply end power supply carrier module, a bus, a plurality of reader-writers and a plurality of lamp boxes. The processor is used for controlling the working state of the reader-writer through the bus. The data adapter is electrically connected with the bus and the processor respectively and is used for enabling the processor and the bus to carry out asynchronous communication. The power supply end power supply carrier module is used for filtering a transmission signal on the bus so as toextract a carrier signal. The bus comprises a power line and a CAN bus, the power line is used for transmitting a power signal, and the CAN bus is used for transmitting a carrier signal. The lamp boxis used for indicating the working state of the reader-writer. The invention further discloses a reader setting method. By means of the reader system and the reader setting method, multiple readers can be connected at the same time, and the working states of the readers can be rapidly displayed.

The invention discloses a manufacturing method of an embedded component circuit board and the embedded component circuit board. The manufacturing method of the embedded component circuit board comprises the following steps that prefabricated layers are processed to form bonding pads arranged to correspond to pins of a component; a second insulating layer is arranged on the processed prefabricatedlayers, and first through holes are formed in the portions, corresponding to the bonding pads, of the second insulating layer and filled with a conducting adhesive material; the component is attachedto a first daughter board, and the pins of the component stretch into the first through holes; a groove matched with the component is formed in a first insulating layer; and the first daughter board and a second daughter board are pressed to be combined. According to the manufacturing method of the embedded component circuit board, the component can be fully attached to the second insulating layer, the component is closely matched with the first daughter board and the second daughter board, no hole exists, liquid is not likely to be retained in the circuit board, no influence is caused to workof the circuit board, and therefore the reliability of the manufactured circuit board is good.

The invention discloses an inverter IGBT bonding wire aging on-line monitoring method and system based on junction temperature normalization, and belongs to the field of power electronic equipment core device reliability, and the method comprises the steps: building an aging model through combining an aging mechanism of an IGBT bonding wire; selecting characteristic parameters of aging and junction temperature, deducing a characteristic identification formula in combination with an aging model, and performing parameter identification on an inverter IGBT module; on the basis of a novel collector-emitter saturation voltage drop Vceon sampling circuit, a method for monitoring aging of an IGBT bonding wire of an inverter on line is provided. The sampling circuit can capture the full-period waveform of Vceon changing along with the collector current Ic so that the characteristic parameters of aging and junction temperature are obtained for state monitoring; interference of the junction temperature on state monitoring can be eliminated through junction temperature normalization; finally, comparing the IGBT aging index with the aging threshold value to judge the aging state in real time, and triggering the inverter IGBT failure early warning according to the aging state.

The present disclosure provides a proximity switch comprising: a housing having a first opening and a second opening; a switch body positioned in the housing; a watertight socket hermetically inserted into the first opening, and electrically connected with the switch body; a sensing piece movably inserted into the second opening and configured to move towards the switch body under the action ofan external force; an insulation sealing body located between the switch body and the sensing piece, connected with the housing in a sealed mode, dividing an inner cavity of the housing into a firstcavity and a second cavity, wherein the switch body is located in the first cavity, and the sensing piece is located in the second cavity. The proximity switch has high pressure resistance, is good insealing performance and can adapt to the deep sea working environment.