62results about How to "With self-recovery function" patented technology

The invention discloses an anti-shock damping safety seat. The both sides at the bottom of a seat main body are connected with a supporting plate through damping rods; the back surface of the seat main body is in sliding connection with a back plate through a damping connecting piece; the damping connecting piece comprises a connecting block, a damping spring group, a silica gel layer and a sliding block; one side of the connecting block is fixedly connected with the back surface of the seat main body, while the other side of the connecting block is connected with the silica gel layer through the damping spring group; one side of the silica gel layer is connected with the sliding block; a sliding chute in fit with the sliding block is formed in the back plate; a fixing base is coated with a first anti-collision bag; the first anti-collision bag is filled with a buffer material; a buffer bag is arranged in the fixing base and filled with a buffer gas generating material; second anti-collision bags are arranged on the back surface and the bottom surface of the seat main body and are filled with an energy absorbing material; arc-shaped rubber layers are arranged on the outer sides of the second anti-collision bags. The anti-shock damping safety seat, disclosed by the invention, is better in shock resistance, good in buffering and damping effect, capable of automatically recovering within a certain range, and good for protecting human body.

The invention relates to an integrated charging and acquisition terminal, belonging to an electronic device for charging and data acquisition of an intelligent electric meter. The integrated charging and acquisition terminal mainly comprises a display unit, an IC (integrated circuit) card interface circuit, an encryption and authentication interface circuit, an RS485 interface circuit and a powercarrier circuit which are connected with a single chip microcomputer, wherein the IC card interface circuit and the encryption and authentication interface circuit are formed by adopting an electrostatic protection chip ESDA6V1-5W6 and an ESAM (embedded secure access module) chip; the RS485 interface chip in the RS485 interface circuit is connected with the single chip microcomputer by two optical coupling circuits; a thermistor, a piezoresistor and another thermistor are connected between an A end and a B end of the RS485 interface chip in sequence and in series; and the A end and the B end are respectively connected with a two-way transient diode and then are grounded; and the power carrier circuit mainly comprises a three-phase carrier module. The integrated charging and acquisition terminal integrates an IC card interface, a power carrier interface and an RS485 interface and has the characteristics of convenience in charging, electricity utilization inquiry and data forwarding fora user and the like.

The invention discloses a self-recovery single particle resistance latch register structure based on a time-delay unit, comprising two clock-control inverter structures, four dual-input inverter structures, two transmission gate structures, one time delay unit and a C unit structure; the four dual-input inverter structures constitute a dual-mode interlocking structure to realize self-recovery of the single event upset (SEU); the time delay unit structure and an C unit constitute a filtering structure to block the single event transient (SET) coming from the combination logic circuit. The invention can tolerate the SEU happened in the latch register structure and the SET transmitted from the logic circuit, has the self-recovery function, has a simple circuit, reduces the consumption of the area, reduces the power consumption and improves the system reliability.

The invention discloses a communication management machine system and an engineering configuration method. A lightweight Json text field is employed as a data exchange language, and configuration parameters are identified. Json fields are flexibly increased or decreased according to application requirements, so that corresponding dynamic library files are loaded, and reduction, transplantation andexpansion of communication protocol functions are realized. Required conversion protocols are automatically configured through analysis and comparison of the Json text fields, the problem of communication interconnection between heterogeneous systems with different communication standards and different communication protocols in an electric power automation system and an industrial control automation system is solved, the cost is remarkably reduced, communication is more flexible, and construction is more convenient.

The invention discloses a mine intrinsic safety electric source interception self-recovery protection device, which consists of a detecting circuit, a monostable circuit, a signal isolation overlapping circuit and a drive accelerating circuit, wherein the detecting circuit is divided into two routes, one route is connected with the monostable circuit, and the other route is connected with the signal isolation overlapping circuit; the output of the monostable circuit is connected with the signal isolation overlapping circuit; and the output of the signal isolation overlapping circuit is connected with the drive accelerating circuit. The device is suitable for mine intrinsic safety electric source output short circuit protection, can thoroughly cut off the output current under the condition of the short circuit of the output end of the mine intrinsic safety electric source, can realize the output voltage self-recovery function when solving the failure, and reduces the energy released by an electric source when having the failure of short circuit, thereby reducing the energy released by sparkle generated by the short circuit, preventing flammable and combustible gas from being fired by the short circuit sparkle, being capable of reducing the consumption of switch devices when having short circuit, improving the efficiency, and solving the problem of radiation.

The invention discloses an intrinsically safe battery with a self recovery function. The intrinsically safe battery comprises an non-intrinsically safe battery and a current limiting circuit connected between the non-intrinsically safe battery and a load, wherein the battery limit circuit comprises a bidirectional switching circuit, a current detection circuit, an overflowing and short circuit judging circuit, a pulse control circuit and a driving circuit, wherein the current detection circuit is connected with the bidirectional switch circuit; the overflowing and short circuit judging circuit is connected with the current detection circuit; the pulse control circuit is connected with the overflowing and short circuit judging circuit; the driving circuit is connected with the pulse control circuit; the input end of the overflowing and short circuit judging circuit is connected with a reference circuit; the pulse control circuit comprises a monostable trigger circuit which can enable the driving circuit to automatically recover connection again after the driving circuit is cut off. The intrinsically safe battery provided by the invention is simple in structure, is novel and reasonable in design, is convenient to implement, has a self recovery function, can be used fur improving the intrinsic safety output power, has high practicability, has a good using effect, and is convenient to popularize and use.

The invention discloses a wireless fire prevention system. The wireless fire prevention system comprises a monitoring management layer, a data management and analysis layer, a network communication layer and a data acquisition equipment control layer. The monitoring management layer, the data management and analysis layer, the network communication layer and the data acquisition equipment controllayer are combined to form the distributed fire prevention system with the four-stage structure. The monitoring management layer means that users manage fire alarm equipment mainly through mobile clients, alarm parameters and alarm scenes can be set on the mobile clients, historical alarm information and equipment operating states can be inquired on the mobile clients, and family fire alarm information is received on the mobile clients in a remote mode. The data management and analysis layer conducts data storage and analysis and has the functions that user parameter setting is stored, alarm records are stored, equipment failure records are automatically added, module data are collected and analyzed, and whether an alarm is triggered or not to inform the users is determined after the module data are subjected to normalization processing. The network communication layer comprises data acquisition module and gateway communication, gateway module and mobile client communication and localcontrol which is conducted after the Internet is lost.

The invention relates to a storage battery charging protection circuit as well as a storage battery system and a motor vehicle using the circuit. The charging protection circuit comprises a monitoring balance branch, the monitoring balance branch is connected in parallel to each storage battery unit, the monitoring balance branch is provided with at least one bypass element but not provided with a switching element, the bypass element is an element of which the resistance or equivalent resistance is reduced when voltages at two ends reach a set voltage threshold, the bypass element is a voltage stabilizing diode or a piezoresistor, the charging protection circuit further comprises a thermistor with a positive temperature coefficient, the thermistor is connected in series with the storage battery unit, and the formed series branch is connected in parallel to the monitoring balance branch. The charging protection circuit is simplified, the cost is reduced, a storage battery charging protection method is easier to implement, and overcharge, overcurrent and overtemperature of a storage battery are effectively avoided.

The invention relates to the field of few-tooth-difference planetary transmission, in particular to a few-tooth-difference planetary transmission device for realizing intelligent self-adaption to a working load. The intelligent self-adaptive few-tooth-difference planetary transmission device comprises a left planetary gear, a right planetary gear, a left end plate, a right end plate, a casing and a connecting member, wherein one end of the connecting member penetrates through the left planetary gear and the right planetary gear along the axial direction; end parts of two ends of the connecting member are separately and fixedly connected with the left end plate and the right end plate; the left planetary gear is simultaneously meshed with the left end plate and a tooth profile on the casing; the right planetary gear is simultaneously meshed with the right end plate and the tooth profile on the casing; and the left planetary gear, the right planetary gear, the left end plate, the right end plate and the casing form a force closed mechanism. According to the intelligent self-adaptive few-tooth-difference planetary transmission device disclosed by the invention, by using the force closed mechanism formed by the left planetary gear, the right planetary gear, the left end plate, the right end plate and the casing, the transmission device can automatically and steplessly adjust transmission ratio and output rotating speed according to changes of the load without depending on a measurement and control system, and is simple in structure and low in cost.

The invention relates to an over-current protection circuit of an intrinsically safe power supply. The over-current protection circuit is formed by connecting a detecting circuit with a driving circuit. With the over-current protection circuit, the output current can be intercepted quickly and completely once the intrinsically safe power supply is subjected to over-current output or short circuit, thus, the energy being released under such condition can be limited, and the self-recovery function can be implemented while removing the fault; and the over-current protection circuit is simple in structure, and safe and reliable, and can be widely applied.

The invention relates to an energy-saving system device for fresh air, and relates to the field of electrical technology. The energy-saving system device comprises a main control unit module, an air inlet system module, an exhaust system module, a temperature and humidity control module, a key setting module, a status display module, a power module, a power-off protection module, a self-recovery function module and a communication function module. The air inlet system module, the exhaust system module, the temperature and humidity control module, the key setting module, the status display module, the power module, the power-off protection module, the self-recovery function module and the communication function module are respectively connected with the main control unit module. Therefore, the formed energy-saving system device for fresh air with various functions of control, indication and integration is capable of replacing existing air exchange fans, negative-ion generators or air purifiers, household central air conditioners, large-tonnage central air conditioners.

The invention discloses a non-isolated CAN bus overvoltage protection circuit. The circuit comprises a CAN bus transceiver, a high and low position bus signal line connected to the CAN bus transceiver, a matching and filter circuit connected between the CAN bus transceiver and the high and low position bus signal line and an overvoltage protection circuit, wherein the matching and filter circuit is used for impedance matching among nodes and an electromagnetic interference of filtering common mode; and the overvoltage protection circuit is at least used for comparing a sampled bus common mode voltage and a reference voltage and cutting off or carrying out self recovery on bus signal transmission between the CAN bus transceiver and the high and low position bus signal line according to a comparison result. In the invention, a CAN bus electrical isolation (optoelectronic isolation or magnetic isolation) scheme does not need to be adopted, non-isolated overvoltage protection to the CAN bus transceiver and subsequent circuits is realized, cost of an isolation component is omitted and a CAN bus overvoltage protection scheme with low cost is realized; and simultaneously, an installation space required by the isolation component and the like are saved, and PCB and product layout difficulty is reduced, which is good for product size reduction.

The invention discloses a current comparison circuit for overvoltage protection, and relates to the technical field of IC chips. The circuit comprises a current comparator which is used for convertinga voltage input signal into a current signal, comparing the current signal with a reference current signal and outputting an initial comparison result signal; a zero temperature coefficient current source coupled to the positive input side of the current comparator and used for generating a reference current signal; and a hysteresis comparator used for comparing the initial comparison result signal with a reference voltage signal and outputting a final comparison result signal. The reference voltage of the hysteresis comparator used by the circuit is provided by the reference voltage source and is not sensitive to the process and the working temperature, so that the change of the overvoltage protection threshold value of the hysteresis comparator at different working temperatures or the influence of the process angle in the chip manufacturing process can be avoided, and the reliability of the overvoltage protection function is improved; by adopting the hysteresis comparator, the anti-interference capability can be enhanced, and overvoltage reference voltage can be set and recovered.

The invention discloses a permanent-magnet bias fault current limiter. The invention applies permanent-magnet bias saturation technology in limiting the short circuit current of an electric line and drives electric equipment in the electric line to be safely operated. Compared with the conventional current limiting technology, the permanent-magnet bias fault current limiter has a simple structure, does not need to add any additional power supply and control device, has quick response time and self-recovery function, and has the development cost which is lower than that of other types of fault current limiters. The permanent-magnet bias fault current limiter structurally comprises a pair of mutually matched iron cores, wherein a permanent magnet is arranged at both ends of the iron cores respectively; and copper wire windings are arranged on the two iron cores respectively.

The embodiment of the invention discloses a base band unit, an RRU (Remote Radio Unit), a PRRU (Pico Remote Radio Unit) and a digital indoor distribution equipment self-checking method. The method comprises the steps: detecting the port state information of each part of equipment through a port state detection module of each part of digital indoor distribution equipment, determining the link quality information through a link quality detection module, and determining the output power information through a radio frequency channel detection module, so that the link condition of the digital indoor distribution system can be clearly fed back. Meanwhile, a self-recovery function is achieved, the link problem of the digital indoor distribution system can be conveniently, automatically and quickly positioned, and engineering maintenance and equipment opening troubleshooting are facilitated.

The invention discloses a simple driving circuit with load short circuit protection and self recovery functions, which comprises a first triode, a second triode, a control switch, a capacitor and a current-limiting resistor, wherein the first triode is a PNP-type triode; the second triode is an NPN-type triode; the emitter of the first triode is connected with a power supply, the base is connected with the collector of the second triode, and the collector is connected with a load; the base of the second triode is connected with the collector of the first triode, and the emitter is grounded via the current-limiting resistor and the control switch serially connected together; and two ends of the capacitor are connected with the collector and the emitter of the second triode respectively. Two triodes are mainly adopted to build an extremely simple and practical driving circuit with short circuit protection and self recovery functions, the circuit uses few devices, the cost is low, manufacturing is simple and easy, the control is simple, and the circuit can be widely applied to various driving circuits.

The invention discloses a switching power supply voltage type output short circuit protection circuit. The protection circuit comprises a comparator U1, a switching diode D2, a non-polar capacitor C2, a resistor R1, a resistor R2, a resistor R3, a resistor R4 and a resistor R5. The anode of the switching diode D2 is connected with one end of the resistor R1 and serves as the input end V-IN of the output short circuit protection circuit. The cathode of the switching diode D2 is connected with one end of the non-polar capacitor C2 and one end of the resistor R3, and the other end of the resistor R3 is connected with the inverted input end of the comparator U1. The connecting end of the resistor R1, the connecting end of the resistor R2 and one end of the resistor R5 are all connected with the in-phase input end of the comparator U1, and the output end of the comparator U1 serves as the output end V-OUT of the output short circuit protection circuit. The invention further discloses a design method of the switching power supply voltage type output short circuit protection circuit. Due to the switching power supply voltage type output short circuit protection circuit and the design method of the switching power supply voltage type output short circuit protection circuit, hiccup type short circuit protection can be achieved, the self-restoration is achieved, and practicability is high.

The invention relates to an overcurrent protection method and system. The overcurrent protection method comprises the following steps: step a, acquiring a detection current of a detection area of a display panel and determining the temperature of the detection area according to a temperature mapping relation; and step b, when the temperature is greater than or equal to a first threshold value, performing current limiting processing on the current of the detection area. The temperature of the detection area of the display panel is dynamically calculated, the temperature can be more accurately positioned, current limiting processing is carried out when the temperature exceeds the temperature threshold value, the over-killing phenomenon caused by misjudgment is avoided, current rises automatically when the temperature is lower than the temperature threshold value, and the self-recovery function is achieved.

The invention relates to a public building energy consumption full-automatic monitoring system, which is a bridge between a top layer, namely, a data center and a bottom layer, namely, field meteringequipment in an energy consumption monitoring system. A universal industrial personal computer is adopted as a hardware platform, and the platform is provided with a comprehensive service module, a system management module and a system platform maintenance module which are required for building energy consumption monitoring, so that software and hardware integration is realized; the public building energy consumption full-automatic monitoring system has relatively high stability and reliability, is relatively strong in environment adaptability and electromagnetic interference resistance, andis suitable to be mounted in various field environments such as building power distribution rooms, equipment rooms and the like for use. The system has a relatively strong automatic operation supervision capability; automatic restart and function recovery of the system under various non-permanent faults can be completed; perennial unattended operation and full-automatic monitoring functions are successfully achieved; and an important innovation is made in the field of public building energy consumption monitoring.

The invention relates to the technical field of analytical test instruments, in particular to a novel plasma portable mercury pollution detector. The novel plasma portable mercury pollution detector mainly comprises an all-fiber sensing unit and a demodulation unit. In the all-fiber sensing unit, gold nanoparticles and optical evanescent waves act to generate surface plasma resonance, and a resonance peak value is obtained at the resonance wavelength. In the demodulation unit, reflection characteristics of a fiber bragg grating are utilized to adjust the scanning Bragg center wavelength of a strain gauge, so that absorption peak wavelength detection of the sensing probe is converted into light intensity detection. The sensing unit is composed of plasma gold nanostructures of an optical fiber, utilizes sensitivity of the surface plasma resonance wavelength to particle concentration of the nanostructures to detect the concentration of adsorbed mercury particles, improves the mercury pollution detection rate and has a self-recovery function. The demodulation unit based on the fiber bragg grating has the advantages of easiness in flexible integration and miniaturization, and can detectthe mercury content in gases, liquids and narrow spaces.

The invention discloses a convenient-to-judge detection type over-current protection device which comprises a box body. An electrifying plate is embedded in the inner wall of the top of the box body,a conductive column is rotatably connected to the inner wall of the bottom of the box body through a bearing, and a rotating plate made of an insulating material is coaxially welded to the upper end of the conductive column. Memory metal is fixedly connected between the rotating plate and the electrifying plate, and a circular connecting plate is coaxially welded to the lower end of the conductivecolumn. The device has the advantages that overload current in a household circuit and a short circuit problem of an electric appliance can be timely responded, the household circuit and the electricappliance are protected, the storage battery electric appliances in the box body are connected in series, by utilizing the characteristic that the phase resistance value of the internal circuit of the short-circuited electric appliance is small, the current of the storage battery enables the indicating lamp to emit a comparative amount of light, a user can quickly discover which electrical appliance is short-circuited, so that the problem can be conveniently solved in time.

The invention relates to an electricity steal-resistant system, comprising an ammeter, a power line, a zero line, a user terminal, an electricity stealing module and a grounding switch, wherein the ammeter is provided with a power line charging end, a zero line charging end, a power line discharging end and a zero line discharging end, the zero line is connected with the zero line charging end, the power line discharging end is connected with the user terminal, the electricity stealing module comprises an electricity steal-resistant switch and a detecting line, the electricity steal-resistant switch is connected between the power line and the power line charging end, the detecting line is respectively connected with the zero line and the zero line discharging end, the zero line discharging end is connected with the grounding switch, the electricity steal-resistant switch is switched off when the detecting line detects that the zero line and the zero line charging end are cut off with each other, and the grounding switch is switched off, and the electricity steal-resistant switch is switched on under the other conditions. Compared with the prior art, the electricity steal-resistant system can automatically cut off an electric wire when the electricity is stolen by means of one-wire and one-ground; and the electricity steal-resistant system has the advantages of automatic restoration and the like, wherein equipment can automatically restore the power supply for a user if the user stops stealing the electricity.

The invention relates to the field of communications, and particularly provides a double-cache message processing method with control information separated from data. The method aims to solve the problems that an existing message forwarding mechanism is too complex and the phenomenon of cache deadlock is likely to happen. For the purpose, the method includes the steps that an independent data cache and an independent control information cache are provided; data of a message are written into the data cache; the length of the message and the starting write-in address are calculated, and stored in the control information cache; control information of the message is written into the control information cache; the message is read out from the data cache according to the length of the message in the control information cache and the starting write-in address. Compared with a traditional forwarding mode that the control information and data are stored in the same cache, the design operation is greatly simplified through the method, and the phenomenon of read-write control deadlock is avoided.

The invention relates to a miniature air station self-calibration method based on big data. The method comprises the steps of: enabling a data processing module to carry out the judgment of the data, wind speed and the like of at least one set of high-precision equipment and a plurality of air micro stations, carrying out the condition judgment in sequence, and acquiring a data stream after the same environment gas condition is met; carrying out data preprocessing on the data stream by the data processing module; carrying out effective data judgment on the data stream by the data processing module; establishing a training model for an effective data sequence; establishing an evaluation model according to calibration parameters obtained by the training model; and selecting a calibration parameter from the evaluation model for result output, and correcting a monitoring value of an air micro-station by using the calibration coefficient to complete calibration and correction by the data processing module. According to the miniature air station self-calibration method, the calibration efficiency is improved, the calibration cost is saved, a method of storing multiple groups of calibration parameters is adopted, calibration errors caused by difference data are overcome, and the data reliability of model self-calibration is improved.

The invention discloses a rate self-adaptive LDPC decoder suitable for aerospace communication. The system comprises an input data processing module, an iterative decoding module and an output data processing module. The input data processing module comprises a frame synchronization detection unit, an FIFO memory and a null frame filling unit. A data stream is input into the frame synchronizationdetection unit, the frame synchronization detection unit performs frame synchronization detection on data and sends synchronized data frames into an FIFO memory, and an empty frame filling unit readsthe data frames from the FIFO memory or fills empty frames into an iterative decoding module according to full state marks and empty state marks of the FIFO memory. After the data is decoded by the iterative decoding module, the output data processing module performs hard decision on the iteratively decoded data and performs framing output. According to the invention, through filling the empty frame into the input data, the decoding operation of adaptively processing different rate data by a single master clock is realized.

The embodiment of the invention discloses a power control circuit, which comprises a power input end, a load output end, a switch sub-circuit, an alternating-current sampling sub-circuit, a comparisonsub-circuit and a control sub-circuit. The switch sub-circuit is used for receiving a control signal of the control sub-circuit and controlling the on-off state of the switch sub-circuit according tothe control signal. The alternating-current sampling sub-circuit is used for collecting an analog current signal or an analog voltage signal and outputting the analog current signal or the analog voltage signal to the comparison sub-circuit. The comparison sub-circuit is used for converting the analog current signal or the analog voltage signal into a digital voltage signal, comparing the digitalvoltage signal with a preset voltage threshold to obtain a first comparison result and outputting the first comparison result to the control sub-circuit. The control sub-circuit is used for outputting a first control signal to the switch sub-circuit according to the first comparison result. According to the embodiment of the invention, the current and voltage abnormality condition of a standby power system is detected, the standby power system has a self-recovery function after a fault is removed, and the safety and reliability of the standby power system are improved.

A fully automatic monitoring system for public building energy consumption is a bridge between the top layer of the energy consumption monitoring system, namely the data center, and the bottom layer, namely the on-site metering equipment. The comprehensive business module, system management module and system platform maintenance module, integrated software and hardware; the fully automatic monitoring system for public building energy consumption has high stability and reliability, strong environmental adaptability and anti-electromagnetic interference ability, It is suitable for installation in a variety of on-site environments such as building power distribution rooms and equipment rooms. The system has a high automatic operation supervision capability, can complete the system automatic restart and function recovery under various non-permanent faults, successfully realized the perennial unattended operation and fully automatic monitoring functions, and made a great contribution in the field of public building energy consumption monitoring. important innovation.

The invention discloses an integrated seat which comprises a supporting base, a seat cushion and a backrest, the seat cushion is located above the supporting base, the rear portion of the seat cushion is hinged to the supporting base, the lower portion of the backrest is hinged to the supporting base, and a synchronous linkage mechanism is connected between the seat cushion and the backrest; a leg support assembly is arranged on the seat cushion and comprises a leg support linear drawing assembly and a leg support body, the leg support linear drawing assembly is installed on the seat cushion, and the leg support body is installed on the front portion of the leg support linear drawing assembly. The method has the remarkable effects that the collaboration of the seat backrest and the seat basin / seat cushion during rotation adjustment can be improved; according to different customer requirements, the overturning resistance can be automatically adjusted, the leg support has a self-recovery function after adjustment, the leg support can be overturned while being pulled forwards and backwards so as to be unfolded or folded in one step, a complex connecting rod mechanism is avoided, the structure is greatly simplified, and the cost is reduced.

The invention provides an Mbus interface control circuit, comprising a level control reference module which generates a reference voltage according to a control signal sent by a host computer, and sends the reference voltage to a voltage conversion and logic control module. The signal sampling receiving module performs current signal sampling on the voltage conversion and logic control module, andgenerates a data signal transmitted to the host computer according to the sampled signal. A logic current limit protection module generates a control voltage accord to a sampling signal and sends that control voltage to a voltage conversion and logic control module. The voltage conversion and logic control module controls the current signal of the M_BUS interface module to be turned on or off according to the reference voltage and the control voltage, and transmits the current signal to the signal sampling and receiving module. An M_BUS interface module for connecting subsequent MBUS slave circuits. The invention realizes overcurrent protection, power-off and signal transmission control of the MBUS circuit through logic control between hardware circuits, reduces loss to a maximum extent,and greatly improves stability and reliability of the MBUS circuit.

The invention discloses a switching power supply voltage type output short-circuit protection circuit, which includes a comparator U1, a switching diode D2, a non-polar capacitor C2, and a resistor R1, a resistor R2, a resistor R3, a resistor R4 and a resistor R5; The anode is connected to one end of the resistor R1 and is the input terminal V-IN of the output short-circuit protection circuit, the cathode of the switching diode D2 is connected to one end of the non-polar capacitor C2 and one end of the resistor R3, and the other end of the resistor R3 is connected to the comparator The inverting input terminal of U1 is connected, the connection terminal of resistor R1 and resistor R2 and one end of resistor R5 are connected with the non-inverting input terminal of comparator U1, and the output terminal of comparator U1 is the output terminal V of the output short circuit protection circuit. OUT; the invention also discloses a design method of a switching power supply voltage type output short-circuit protection circuit. The invention can realize hiccup type short-circuit protection, has self-recovery function, and has strong practicability.