559results about How to "Timely protection" patented technology

A shared (proxy) OAM session is performed in a packet-based network on behalf of a plurality of connections. First and second connections are each routed between respective nodes of the network for carrying data traffic. The second connection shares a portion of the routing of the first connection. The shared OAM session is performed along a path which is co-routed with at least part of the shared portion of the routing of the first connection and the second connection. Failure notification signalling is propagated to an endpoint node of each of the first and second connections when the shared OAM session indicates a failure has occurred. The use of a shared OAM session reduces processing at nodes and reduces OAM traffic. Each connection can be a trunk, such as a PBT / PBB-TE trunk, or a service carried within a trunk.

The invention belongs to the technical field of electrostatic spinning and relates to a portable handheld electrostatic spinning device. The top of a pushing rod of a medical syringe is provided with a pressure welding switch, a metal foil is arranged on the top side fixedly, a spinning solution is arranged in a front end inner cavity of the medical syringe, a square battery and a high-voltage direct-current inverter are arranged fixedly on the side wall of the syringe in a butt joint mode, and a stainless steel needle head which is used for spinning is arranged at the bottom end of the syringe in an inserting mode. A conventional medical syringe needle head structure and the syringe are combined and matched, the spinning solution is stored in the inner cavity of the medical syringe which is provided with the stainless steel needle head, the square battery provides a power supply for the high-voltage direct-current inverter, when the direct current voltage is inverted, the voltage in the unit of kilovolt, the positive pole of the high-voltage direct-current inverter is communicated electrically with the stainless steel needle head, and the negative pole of the high-voltage direct-current inverter is communicated electrically with the metal foils. The device is simple in overall structure, is convenient to carry, use and operate, applicable to occasions such as outdoor teaching and wounded rescue and high in economical value.

The invention discloses an over-current detection circuit and an over-current protection circuit. The over-current detection circuit comprises a current sensor, a current signal processing circuit and a current comparison circuit, wherein the current sensor is used for collecting current analog signals output by a motor power module, the current signal processing circuit is connected with the current sensor, converts the current analog signals collected by the current sensor into voltage signals capable of being measured by an operation amplifier, carries out filtering and isolation, and outputs the voltage value; the current comparison circuit is connected with the current signal processing circuit, compares the voltage value output by the current signal processing circuit with the preset reference voltage upper limit value and the reference voltage lower limit value, judges whether the voltage value exceeds the preset reference voltage upper and lower limit range or not, and outputs detection results. The analog signals are collected through the current sensor, the collected analog signals are sent to the current signal processing circuit, whether the over current occurs or not is detected through a comparator, the hardware is adopted for realizing the fast response of the current over flow fault, and the timely protection can be realized on the motor power module.

The embodiment of the invention discloses a multi-carrier peak clipping module which can carry out peak clipping processing to a multi-carrier non-main BCCH carrier according to the input power control information of each carrier of a next time slot so as to obtain the output power of the next time slot of each carrier after the peak clipping and further obtain the new power control information of each carrier of the next time slot. The embodiment of the invention also discloses a multi-carrier control method and a base station. By not carrying out the peak clipping to the main BCCH carrier in a GSM multi-carrier channel, the method for carrying out the peak clipping processing to the non-main BCCH carrier can reduce the total output power of a multi-carrier power amplifier under the condition that the power exceeds ration, thus forming stable GSM network coverage when protecting the reliable operation of a main device so as to guarantee the performance stability of the GSM network.

The invention provides an intelligent power module and an air conditioner. The intelligent power module includes three-phase upper bridge arm signal input ends, three-phase lower bridge arm signal input ends, a current detection end and a PFC control input end; an HVIC tube is provided with terminals connected to the three-phase upper bridge arm input ends and the three-phase lower bridge arm signal input ends respectively, a first port corresponding to the current detection end and a second port corresponding to the PFC control input ends; a first input end of a self-adaptive circuit is connected to the first port, a second input end of the self-adaptive circuit is connected to the second port, and an output end of the self-adaptive circuit serves as an enabling end of the HVIC tube; when an input signal of the self-adaptive circuit at the second input end is on a rising edge, an input signal of the first input end is not received, and an enabling signal of a first level is output, so as to allow the HVIC tube to work; and when the input signal at the second input end is not on the rising edge, the input signal of the first input end is received and an enabling signal of a corresponding level is output according to the input signal.

The invention discloses a mobile communication device and a detecting method of subscriber identity module (SIM) card hotplug. The mobile communication device comprises a baseband chip, an SIM card connector and a clamping buckle, wherein the SIM card connector is in electric connection with the baseband chip, the clamping buckle is arranged on a position of an inlet of an SIM card inserting groove of the SIM card connector and used for being covered on the inlet of the SIM card inserting groove. The clamping buckle is provided with a first detecting assembly which is in electric connection with a first external interrupt pin and used for detecting opening and closing actions of the clamping buckle, and the SIM card connector is provided with a second detecting assembly which is in electric connection with a baseband chip second external interrupt pin and used for detecting plugging in and pulling out states of an SIM card. The mobile communication device and the detecting method of SIM card hotplug can effectively detect SIM card hotplug actions by a user, and timely protect the SIM card and the mobile communication device.

The application discloses a rotor temperature monitoring method for a permanent magnet synchronous motor and a system therefor. The rotor temperature monitoring method includes the following steps: an a-phase line current and a b-phase line current of a permanent magnet synchronous motor stator are firstly obtained as a first line current and a second line current, and meanwhile a line voltage between the a phase and the b phase of the stator is obtained; the first line current, the second line current, the line voltage, the inductance parameter of the permanent magnet synchronous motor and the temperature characteristic equation of the permanent magnet of the rotor are put into a preset rotor permanent magnet temperature expression to calculate and obtain a rotor temperature. The rotor temperature monitoring method and the system therefor do not need to embed a temperature sensor in the rotor to monitor the temperature of the rotor permanent magnet, thereby avoiding the problem of low system reliability due to the configuration of the temperature sensor to monitor the temperature of the rotor permanent magnet.

The invention discloses an alternating current electrified railway in-phase continous power supply system based on multi-port direct current transmission. The system comprises more than one three-phase high-voltage alternating current power supply, direct current converters used for converting three-phase high-voltage alternating current into high-voltage direct current, a high-voltage direct current transmission loop used for transmitting the high-voltage direct current to a loop of each traction transformer, alternating current converters used for converting the high-voltage direct current into low-voltage single-phase alternating current, and a contact network system connected with an output end of the alternating current converter, wherein the contact network system is divided into an alternating current bus and a return line which takes power by a locomotive and then flows back from a steel rail. The system has the advantages that the system is simple in structure principle, high in safety and reliability, and easy to realize and popularize.

The embodiment of the invention discloses a circuit fault detection method, a circuit fault detection system and a controller. According to the method disclosed by the embodiment of the invention, fault detection is carried out by making use of repeated and cyclic behavior characteristics of a charger after a free-wheeling diode or a capacitor is short-circuited when electronic equipment is in a soft start or operation mode, and fault detection is carried out by making use of the characteristics of capacitor voltage and battery voltage in the operation process of the electronic equipment. According to the embodiment of the invention, different detection schemes are adopted according to different characteristics of the electronic equipment before and after startup, effective detection can be carried out under various operation conditions without increasing the device cost, and false report or missing report does not occur; and over-current signal detection is adopted in the embodiment of the invention to timely perform a wave sealing action, a device can be timely protected during fault detection, the fault coverage is not enlarged, damage to other adjacent devices can be avoided, and the detection is quick and effective.

It relates to a hybrid drive control method for locomotives. It comprises collecting vehicle signal, deciding whether to go to the four drive control status based on the battery charge status SOC inside the vehicle signal, based on the battery working status to further decide the full wheel drive execution with the system composed of front drive unit, rear drive unit, engine, generator, battery, with the front drive unit and rear drive unit composed of drive front wheel and rear wheel, engine providing power to the battery, with the battery rear drive unit providing power. It features in the management unit that decides the four wheel drive control status and its execution. It can provide timely, effective protection to the battery, conducive to the extension of its durability, reduction of cost, improvement of stability and security.

The invention relates to a multifunctional current impulse transmitter and a control method. The transmitter is formed according to the following method: the positive electrode of a two-gear direct current power supply is connected with a depressurization chopping constant-current circuit, a clamping circuit, a short-circuit and bridge arm direct connection protective circuit, a bipolar current impulse generator and a load through a switch K; and the negative electrode of the two-gear direct current power supply is connected with the load through the depressurization chopping constant-current circuit and the bipolar current impulse generator. According to the invention, the two-gear direct current power supply is adopted to coarsely regulate an output voltage; the depressurization chopping constant-current circuit is used so as to precisely regulate the output voltage, thereby reducing the variation range of the duty ratio of the depressurization chopping constant-current circuit and improving efficiency; the clamping circuit can perform bootstrap on a capacitor of a clamping voltage source to generate a high voltage in no need of improving the voltage of a direct current power supply or providing an auxiliary power supply; the linearity and the steepness of the failing edge of the current impulse are changed through regulating the voltage of the linear clamping voltage source; and the short-circuit and bridge arm direct connection protective circuit is matched with an impulse controller, so that the circuit has a self-repairing function after a failure is removed.

The invention belongs to the technical field of engineering construction equipment, and particularly relates to a concrete laminating curing machine, and provides a technical scheme aiming at the current problems of a poor concrete troweling surface laminating construction effect and long elapsed time. According to the technical scheme, the concrete laminating curing machine comprises a first connecting plate and a second connecting plate which are horizontally arranged, a drive roller and a driven roller are parallelly arranged between the first connecting plate and the second connecting plate, the drive roller is located at one end of the first connecting plate, the driven roller is located at the other end of the first connecting plate, the outer walls of the two ends of the driven roller are rotatably connected to the oppositely arranged side walls of the first connecting plate and the second connecting plate, the drive roller is in transmission connection with a drive motor, the oppositely arranged outer walls of the first connecting plate and the second connecting plate are symmetrically provided with a first rotating device and a second rotating device respectively. The concrete laminating curing machine saves time, improves the work efficiency of workers, is good in laminating effect, and improves the molding quality of concrete.

The invention discloses an IGBT overvoltage protection circuit and an IGBT overvoltage protection method. The IGBT overvoltage protection circuit comprises an IGBT, a driving source, a collector electrode overvoltage protection circuit and a driving control circuit, wherein the driving source is connected with the gate electrode of the IGBT; the collector electrode overvoltage protection circuit is used for monitoring the voltage of the collector electrode of the IGBT, transmitting overvoltage signals to the driving control circuit when the voltage of the collector electrode of the IGBT exceeds a predefined value, and transmitting current to ensure that the potential of the gate electrode of the IGBT is increased to restrain the rising of the voltage of the collector electrode of the IGBT; the driving control circuit stops the turn-off of the IGBT when receiving the overvoltage signals. As the IGBT overvoltage protection circuit controls the turn-off of the IGBT through the driving control circuit while performing overvoltage protection, so that the requirement on charge current of the gate electrode of the IGBT is small, the response time of overvoltage protection is greatly shortened, and the IGBT can be protected more timely.

For a transportation machine such as a railway vehicle, a space for a driver is secured while collision energy is absorbed at a time of collision with a large obstacle, and entry of a flying object into a driving cab is prevented by a rigid structure at a time of collision with the flying object. Windows 40, 40 are provided in a flying object barrier plate 50 provided at a tip end portion of a driving cab 25, and energy absorbing members 100, 100 are penetrated through the windows 40, 40 to be disposed in a form extending outward of the flying object barrier plate 50 from an inside of the driving cab 25. The energy absorbing members 100, 100 of a large absorbing capacity can be efficiently disposed by utilizing a space of the driving cab 25 provided in a vehicle body. A beam member of a crushable zone 11a including the flying object barrier plate 50 is firmly placed and can be connected to a survival zone 10.

The utility model relates to a transparent conductive film layer for a capacitive touch screen. The transparent conductive film layer comprises a substrate (100), a graphene transparent conductive layer (201) attached on the substrate and a transparent conductive oxide film layer (202) deposited on graphene materials. The transparent conductive film layer is good in conductive performance, high in visible light transmittance and good in adhesive force; and materials are easy to obtain, the cost is low, the technological process is simple, and the whole product yield of the manufactured capacitive touch screen is high.

The invention discloses a motor stalling protection method and device, belonging to the technical field of motor control, and aiming at solving the problems of the existing electric equipment that the equipment does not have a specific stalling protection function, and during operation, hidden dangers of machine failure and motor damage exist. According to the motor stalling protection method disclosed by the invention, a storage module is used for storing a pre-collected standard vibration waveform in normal work of the motor, a vibration sensor is used for collecting a real-time vibration waveform of the motor, a control module is used for comparing the real-time vibration waveform of the motor with the standard vibration waveform in normal work of the motor, and if the difference value between the two excesses a preset value, the control module sends out a protection signal. The response speed is high, the control is accurate, the motor can be timely protected, and failure, vibration, abrasion abnormity and the like caused by mechanical faults of the motor can be prevented. The invention further provides a motor stalling protection device.

The invention relates to a grounding switch capable of extinguishing arc quickly through electromagnetic reluctance tension. The grounding switch comprises a fixed contact and a moving contact of which abutting ends are arranged in a vacuum arc-extinguishing chamber, and further comprises an electromagnetic reluctance tension mechanism connected with the moving contact; the electromagnetic reluctance tension mechanism is composed of a terraced push rod, a metal disk and a permanent magnet disk both arranged on a large-diameter section of the push rod in a sleeve manner, a cylindrical magnetizer fixedly arranged at one end of a small-diameter section of the push rod, a hollow cylindrical insulating sleeve with a ring slot, and a yoke circularly arranged at periphery of the cylindrical insulating sleeve, wherein the large-diameter section of the push rod is connected with the moving contact, the metal disk is located above the permanent magnet disk and is attracted together with the permanent magnet disk, and the cylindrical magnetizer is located at the hollow position of the cylindrical insulating sleeve; and the grounding switch further comprises a hollow permanent magnet disk support plate of which the upper side fixes the permanent magnet disk, and a gap part between the permanent magnet disk support plate and the metal disk is provided with a plurality of compressed energy storage springs. The grounding switch capable of extinguishing arc quickly through electromagnetic reluctance tension is simple in structure and relatively low-cost, performs switch-on action very quickly, has high arc-extinguishing capability, and can switch on large current.

The embodiment of the invention relates to the technical field of communication, and discloses an anti-fraud system and method, a server and a storage medium, and the anti-fraud system comprises a suspicious call analysis module, a network data obtaining module, a fusion analysis module and a warning service module. The suspicious call analysis module is used for identifying the call signaling corresponding to the personal account according to a first preset model and recording suspicious call data; the network data acquisition module is used for discriminating the personal internet surfing data according to a second preset model and acquiring network data for accessing a malicious website; the fusion analysis module is used for performing fraud identification on the suspicious call data and the network data according to a third preset model; and the warning service module is used for intercepting and sending out early warning after judging that the personal account is suspected to becheated. By aggregating the call data and the internet surfing data, the fraud event is more accurately and comprehensively recognized, comprehensive reminding and interception are achieved, and the fraud event prevention and control capacity of family users is effectively improved.

The invention discloses a fast sprint controller of a two-wheel micro-mouse based on double processors. The fast sprint controller comprises a power source device, a voltage detecting module, a low-voltage alarm device, a maze optimal information calling module, a sensor, a servo adjusting control unit, a first driving unit, a second driving unit, a first motor and a second motor. The voltage detecting module is electrically connected with the power source device and the low-voltage alarm device. The power source device is electrically connected with the maze optimal information calling module, the sensor, the servo adjusting control unit, a first signal controller, a second signal controller, the first motor and the second motor. The maze optimal information calling module controls the controller through the servo adjusting control unit, and the motors are driven independently and synchronously in a servo mode by the controllers. By means of the method, the fast sprint controller of the two-wheel micro-mouse can be provided, and the fast sprint of the micro-mouse can be achieved in a match through the processors of a double-buffering structure.

The invention is concerned with the multi-level switch system for electric power line breaking protection, to install on the three phase four wire power line, on the three phase line system center with the centralized manager for three phase carrier wave communicating (A) and the level one switch (K1-n), on the single phase line system end with the microprocessor for single phase carrier wave communicating and the level two switch (QF), which are communicating through power line. The system end current detector (2) tests the loading current and the residual current at anytime, and sends the signal to the center or the end level two microprocessor (MCU) that shows in the keyboard display unit (ZCG) for obtaining information on time. The centralized manager (A) can send inquire order to each end in cycle and judging the broken branch by if the end cannot respond on time whilst the level one switch will report automatically to protect the whole system on time.

The invention relates to an airbag which comprises a sleeve barrel, a gas cylinder adapter, a spring, a needle, a torsional spring rod and an airbag body. According to the airbag, the spring is made to expand by rotating the torsional spring rod, the needle is pushed by the spring to move horizontally and punctures the cylinder mouth of a gas cylinder, gas in the gas cylinder enters the airbag body fast, and the airbag body is automatically inflated. According to the airbag, the cylinder mouth the gas cylinder is punctured through a mechanical transmission mechanism, air inflation is fast, timely protection can be provided for the human body, and the airbag is safe and reliable. The airbag is simple in structure and small in size, meets the design requirement of a portable device, and is convenient to carry and wide in application range.

An embodiment of the invention provides a storage card base, a mobile terminal and a method for protecting a storage card. The storage card base comprises a first contact point, a second contact point, a guide groove, and a junction embedded guide groove. The first contact point is disposed on a foundation of the storage card base. The second contact point is disposed on the foundation of the storage card base and is electrically connected with the first contact point when an upper cover of the storage card base is closed. The guide groove is disposed on the foundation of the storage card base and is located on a side of a junction which connects the foundation and the upper cover. The storage card base enables increase of delay time of stopping read-write protection. The storage card is protected timely, and repair rate of the storage card is reduced.

The invention discloses an IGBT driving circuit of a motor controller and a motor controller. The IGBT driving circuit comprises a functional safety circuit disposed on a motor controller driving board, and a detection feedback circuit and a pulse width modulation (PWM) buffer circuit which are connected to the functional safety circuit. The detection feedback circuit detects an IGBT module of themotor controller and sends a specified fault signal to the functional safety circuit when detecting a specified fault of the IGBT module. The functional safety circuit, after making a judgment according to a preset fault handling rule and the received specified fault signal, outputs a corresponding control signal to the PWM buffer circuit. The PWM buffer circuit generates a PWM signal for drivingthe IGBT module according to the corresponding control signal, and controls the on-off state of the IGBT module to protect the IGBT module. The IGBT driving circuit has various protection functions,improves the stability and safety of the IGBT, and can achieve quick operation and timely protection.

The invention discloses an intelligent following control system and an intelligent following control method for a cable of a chain-driving coal cutter. The system comprises a following control terminal which is used for communicating with a coal cutter control mainframe, used for controlling the running of the coal cutter and controlling a cable drawing device of the coal cutter to run. The method comprises the following steps: (1) initializing the following control terminal; (2) controlling the tensioning and collecting the signals of a chain and a cable clamp; (3) starting and running a following control system; (4) judging if a running feedback signal of the coal cutter exists between the coal cutter control mainframe and a following control mainframe; (5) judging if a rotating direction of a motor is anticlockwise when the running feedback signal of the coal cutter exists; (6) judging if the change in tensioning force of the chain is decreasing when no running feedback signal of the coal cutter exists; and (7) alarming for fault and halting the following control system. According to the invention, the following state of the coal cutter and the cable drawing device of the coal cutter can be monitored in real time, the cable of the coal cutter can be protected and dragged in time and the secondary bending of the cable is avoided in a coal mining process of the coal cutter.

The invention provide a three-limit time-base circuit composed of analogue integrated circuit operational amplifier A (or voltage comparator B), few separate electronic elements by using new principleand ingenious connection mode. The three-limit time-base circuit has top and bottom limit main control functions completely compatible to all functions of classic 555 time-base circuit can be used asultra-top and bottom limit control circuit and astable, monostable and bistable circuit. The invention increases exceed bottom limit protection and control function, when inputted sensing circuit hasfault, fault display and protection control can be executed in time to prevent the main control circuit from being out of control. The invention, used in control circuits for temperature, pressure, water level etc., may improve security, and prevent severe accidents (such as fire hazard). So, the invention has wide use in electronic application field such as household electrical appliances, simple controllers, and high cost performance of products are provided.

The invention discloses a lamination sheet-type heat and pressure sensitive composite resistor and a preparation method thereof. The composite resistor consists of a pressure sensitive resistor part, an intermediate transition layer part and a heat sensitive resistor part by overlaying, wherein the structure of the pressure sensitive resistor part is the alternative overlapping and lamination combination of a pressure sensitive resistor porcelain sheet, a first electrode layer, a pressure sensitive resistor porcelain sheet and a second electrode layer; the first electrode layer and the second electrode layer are staggered respectively; the structure of the heat sensitive resistor part is the alternative overlapping and lamination of a heat sensitive resistor porcelain sheet, a third electrode layer, a heat sensitive resistor porcelain sheet and a fourth electrode layer; the third electrode layer and the fourth electrode layer are staggered respectively; the intermediate transition layer part is positioned between the heat sensitive resistor part and the pressure sensitive resistor part. According to the invention, a cofiring technique that base metal nickel is adopted as an internal electrode is adopted, so that the cost can be reduced; the preparation process can be simplified; the device reliability can be improved; the heat conduction path can be reduced; the protection effect to the pressure sensitive resistor by a heat sensitive element is enhanced; meanwhile, the multi-protection of overheating, overcurrent, overvoltage and the like of a circuit can be achieved.

The invention discloses a brushless direct-current motor drive chip and a brushless direct-current motor drive system, and belongs to the technical field of motor control. The chip comprises a clock generation circuit, a power management circuit, an analog-to-digital conversion circuit used for converting analog signals of motor control parameters and motor state parameters into digital signals, a position detection circuit used for converting an output signal of a position sensor into a digital signal and acquiring rotor position information and current speed, a digital processing unit used for outputting PWM signals of motor coils of all phases according to the motor rotor position and current speed, the motor control parameters, the motor state parameters and a modulation algorithm, and a gate drive circuit used for converting the PWM signals of the motor coils of all phases into high-voltage drive signals through a bootstrap circuit and outputting the high-voltage drive signals. The system comprises a position sensor, a power tube, and the brushless motor drive chip. By integrating brushless direct-current motor control and the drive chip, the degree of integration and flexibility of the chip are improved greatly.

The present invention discloses an overvoltage and overcurrent protecting circuit connected between a power source and a load, which includes: a resettable fuse, a first end of which is electrically connected to an output end of the power source; a switch circuit, a first conduction end of which is electrically connected to a second end of the resettable fuse, and a second conduction end of which is electrically connected to the load; an overvoltage circuit, for detecting whether an output voltage of the power source is overvoltage; an overcurrent detecting circuit, for detecting whether a current flowing through the resettable fuse is overcurrent; and a switch control circuit, a first input end of which is electrically connected to an output end of the overvoltage detecting circuit, and a second input end is electrically connected to an output end of the overcurrent detecting circuit, to control the electrical connection between the output end and the control end of the switch circuit, so as to control disconnection of the switch circuit when the overvoltage and / or overcurrent is detected, and automatically control the conduction of the switch circuit after a preset time period for disconnection is reached. The circuit of the present invention can protect the overvoltage and overcurrent at the same time, and can recover normal operations of the load after the fault state is vanished.

The invention discloses a metal plate surface rust removal device capable of achieving spraying. The metal plate surface rust removal device comprises a machine body and a paint spraying barrel. The two sides of a first guide rod are connected with first moving blocks. A hose is connected between a paint inlet pipe and a paint storage box. A paint outlet is formed in the bottom of the paint storage box. The paint spraying barrel is connected to one side of a second rotating shaft. The metal plate surface rust removal device capable of achieving spraying is provided with the paint storage box and the paint spraying barrel, after rust removal is finished, paint is added into the paint storage box through the paint inlet pipe and the hose, the paint can flow out of the paint outlet to fall onto the paint spraying barrel after passing through the paint storage box, then a hydraulic rod is started, the paint storage box and the paint spraying barrel move downwards till making contact with aplate obtained after rust removal is finished, then a fourth motor is started, a moving base moves to drive a work box and the clamped plate to move together, the plate rubs with the paint spraying barrel, the paint spraying barrel with the paint starts to rotate through the second rotating shaft to spray the plate obtained after rust removal, and the effect of timely protection is achieved.