37results about How to "Avoid bad consequences" patented technology

The invention discloses a precise advertisement putting optimization method and system, and relates to the technical field of advertisement putting, and the method comprises the following steps: collecting and recording key parameter information of different data sources in a merging process in real time, providing basic data for the subsequent anomaly detection, and providing an optimization result for guaranteeing the comprehensiveness of the data; recording each step of operation in all merging processes; and carrying out anomaly analysis on the key parameter information subjected to the standardized processing, and identifying abnormal data generated in the merging process by analyzing multi-dimensional information. According to the invention, by monitoring the cross-session persistence information and the platform situation consistency information in real time, the system can effectively prevent the problem of data merging errors or segmentation, improve the accuracy of user portraits, and accurately push advertisement contents, thereby improving the click rate and the conversion rate. A multi-level anomaly detection and grading processing mechanism ensures that risks are timely handled, the safety of data integration and the stability of advertisement putting are improved, and the data integrity is guaranteed.

The invention relates to the technical field of communication link switching, in particular to an intelligent power grid communication link automatic switching method and system, and the method comprises the steps: obtaining optical power data of a main optical fiber communication link at each sampling moment, determining a component jitter effect value of each modal component corresponding to each sampling moment, determining the electromagnetic interference quantity at each sampling moment by combining the change chaos degree of the modal component, analyzing the change of elements in the trend component vector to obtain an optical fiber communication abnormal value at each sampling moment, and calculating the communication quality reliability at each sampling moment based on the optical fiber communication abnormal value; and according to a comparison result of the communication quality reliability and a preset reliability threshold, judging the communication condition of the main optical fiber communication link, and carrying out automatic switching on the optical fiber communication link. According to the invention, the switching condition of the optical fiber communication link in the smart power grid can be judged more accurately, and the optical fiber communication fault can be processed in time.

The invention discloses a thyroid postoperative bleeding monitoring method and system, and relates to the technical field of medical monitoring. According to the method, the YOLO-Seg network model is adopted, and the SRCNN layer and the Blind Dconv layer are combined, so that the drainage tube area and the dressing area can be identified with high precision, the accuracy of area identification is improved, and the definition and the deblurring effect of the image are improved; the color, the category and the proportion information of the drainage liquid are accurately detected, so that powerful support is provided for judging whether the patient bleeding or not; by comprehensively analyzing the physiological index data, the overall health condition of the patient is more comprehensively evaluated, the health condition of the patient is accurately reflected through the physiological index score, the potential bleeding risk is found in time, a comprehensive, accurate and timely solution is provided for monitoring the thyroid postoperative patient, and safety and rehabilitation of the patient are effectively guaranteed.

The invention relates to a heat dissipation type loudspeaker, which comprises an outer frame, a vibration assembly, a voice coil assembly, a magnet assembly and a cooling assembly, and is characterized in that the vibration assembly, the voice coil assembly and the magnet assembly are arranged in the outer frame; the two ends of the voice coil assembly are connected to the vibration assembly and the magnet assembly respectively, and the cooling assembly is arranged on the outer side of the magnet assembly.

The utility model belongs to the technical field of sheet forming, and relates to a manual stacking anti-misoperation device of a plastic vacuum forming machine, which comprises a plastic vacuum forming machine (3) provided with a manipulator (1), a stacking position, a suction position and a single-point test button, and further comprises an electric self-locking button (2) arranged on the plastic vacuum forming machine, the electrical self-locking button is connected with the single-point test button according to an electrical self-locking principle. According to the utility model, single-point test misoperation can be prevented, and the mechanical arm and other parts are prevented from being damaged.

The invention relates to the technical field of optical communication, in particular to a PON product multi-machine multi-service testing method and system and a storage medium. The testing method comprises the steps that a device to be tested and a testing environment are prepared, the device to be tested comprises a plurality of PON products, and the testing environment comprises a multi-machine server, an OLT, an AC Source and a network simulation device; configuring a power-on and power-off time sequence of the AC Source, and dynamically adjusting the power-on and power-off time sequence according to the power consumption characteristic of the to-be-tested equipment; and carrying out multi-machine multi-service configuration, including WAN interface, voice interface and VI D distribution. According to the test method, the multi-machine server and the automatic test program are used, so that the test efficiency and the spot test number of the product are greatly improved. Meanwhile, various parameters in the testing process can be monitored in real time through the testing system, and problems can be found and solved in time.

This utility model provides a heating tabletop assembly with integrated wiring and a heated dining table. The heating tabletop assembly includes: a heating base with a central mounting space and an inner mounting space on its upper periphery; an inner tabletop covering the upper side of the heating base; an inner heating plate positioned in the inner mounting space, the inner heating plate making heat exchange contact with the inner tabletop; an electromagnetic heating element positioned in the mounting space, the electromagnetic heating element making heat exchange contact with the inner tabletop; and a wiring fastener located on the lower side of the heating base, with electrical wires extending from the terminals of the inner heating plate and the electromagnetic heating element electrically connected to the wiring fastener. Because the heating tabletop assembly has two heating elements and is designed as an integrated modular structure, it allows for modular assembly and disassembly of the heated dining table structure. The heated dining table structure features independent modular heating components, satisfying the multi-area heating function organization of the heated dining table while making the heated components easier to inspect and replace. Meanwhile, the power connection of the two heating areas based on the cable fixing component integrates and unifies the power connection, avoiding adverse consequences caused by chaotic power connection.

The invention discloses a heart failure patient salt and water intake monitoring method, system and device, and the method comprises the steps: setting the illness condition description of a heart failure patient, and setting the daily salt intake standard value and daily water intake standard value of the heart failure patient; acquiring salt intake, water intake and water discharge of the heart failure patient every day; acquiring medication condition description and illness condition description uploaded by the patient every day; when the salt intake and the water intake of the patient are greater than the set daily salt intake standard value and the daily water intake standard value, sending out a saline intake standard exceeding prompt; medical staff provide nutrition suggestions and salt intake suggestions for the patients according to salt intake, water intake, water discharge, medication condition description and illness conditions of the heart failure patients. Specific salt and water intake standards are respectively set for heart failure patients with different illness conditions, so that accurate personalized monitoring and management are realized, and the treatment effect is effectively improved.

The invention discloses a double-color injection mold capable of rapidly deforming and demolding, and relates to the technical field of injection molds, the double-color injection mold comprises an upper mold and a lower mold, the upper mold and the lower mold are used for injection molding of products, the double-color injection mold further comprises an air cylinder, the air cylinder is fixedly installed in the lower mold, and the output end of the air cylinder is fixedly connected with a lifting plate; a push rod is vertically and fixedly connected to the lifting plate, an inner pulling plate is horizontally and slidably connected into a mold core on the lower mold, and the side wall of the inner pulling plate abuts against the inner wall of the product. The two inner pulling plates can push a product from the inner wall of the flanging position of the product through step structures on the side faces, so that a flanging structure of the product can be separated from a mold core of a lower mold firstly, and along with continuous action of an air cylinder, a pushing plate drives a traction plate to synchronously move upwards; the product is completely ejected from the mold core of the lower mold to be demolded through the ejector rod and the push plate, and the elastic deformation performance of the product is completely utilized to prevent the product from being forcibly demolded to cause damage.

The present invention provides a precise source tracing and analysis method and device, the method comprising: obtaining meteorological data, atmospheric pollutant monitoring data and comprehensive source spectrum of pollution sources corresponding to each production device in the area corresponding to the production device; analyzing the atmospheric pollutant monitoring data to obtain the corresponding atmospheric pollutant source analysis results; determining the target production device according to the meteorological data corresponding to the appearance time of the abnormal value in the atmospheric pollutant source analysis results, and obtaining the pollution contribution rate corresponding to the target production device based on the atmospheric pollutant monitoring data corresponding to the appearance time of the abnormal value and the comprehensive source spectrum of the pollution source corresponding to the target production device; analyzing the change of the pollution contribution rate, and determining the production device to be checked from the target production device. The method of the present invention can shorten the investigation time, has high traceability accuracy, and can quickly and accurately locate the pollution source.

The invention relates to the technical field of movable column boring and milling machines, and particularly discloses a numerical control movable column boring and milling machine which comprises a movable column boring and milling machine base and two guide rails, and the two guide rails are arranged on the left side and the right side of the top end of the movable column boring and milling machine base correspondingly; a motor screw is connected to the front side of the top end of the movable column boring-milling machine base. The front end of the lead screw is locked at the output end of the motor through a coupler, and the rear end of the lead screw is rotatably arranged on the rear side of the movable column boring and milling machine base through a bearing. The device realizes real-time monitoring of the moving precision, the feeding position precision and the feeding speed of the moving column, so that the machining precision and the workpiece quality of a machine tool are remarkably improved, particularly in the machining field with high precision requirements, serious consequences caused by errors are effectively avoided, and meanwhile, the machining precision is improved by timely finding and correcting deviations. And the production cost and the time cost are reduced, the service life of equipment is prolonged, and a more stable and efficient machining solution is brought to the field of machining.

The invention relates to the technical field of network security protection, and discloses a photovoltaic station 5G network security protection system, which comprises a 5G network security module, the 5G network security module comprises a risk evaluation module, a protection system module and a data transmission module, the risk evaluation module performs construction drilling based on a chaos engineering theory, and the protection system module performs data transmission based on the chaos engineering theory. The risk assessment module is connected with a data acquisition module, the data acquisition module and the protection system module are constructed based on a digital immune technology, and the data transmission module constructs a data transmission channel based on a framework of an endogenous safety protection model. According to the invention, the network security protection model is constructed, then the terminal monitoring module monitors the abnormal behavior of the terminal after the access of the 5G access module, and a protection system is constructed, so that the problems of weak 5G security protection capability and insufficient risk management and control means of the current photovoltaic station are solved.

The polishing liquid supply device (1) is used for supplying polishing liquid to a polishing machine (2) and comprises a material barrel (11) containing the polishing liquid, the material barrel is connected with the polishing machine through a supply pipe (12), the supply pipe is provided with a water pump (13) used for pumping the polishing liquid to the polishing machine, and the supply pipe is further provided with a filter (14) and a pressure gauge (15). The filter is used for filtering particle impurities in the polishing solution, and the pressure gauge is used for detecting the hydraulic pressure in the supply pipe to monitor the blockage condition of the filter. According to the polishing solution supply device, particle impurities in polishing solution can be effectively filtered out through the filter arranged on the supply pipe, meanwhile, the hydraulic pressure in the supply pipe is detected through the pressure gauge, whether the filter and the supply pipe are blocked or not can be judged according to the hydraulic pressure, an operator can check the blocking reason in time, and the working efficiency is improved. And negative effects caused by blockage of the filter and the supply pipe are avoided.

The present invention discloses an intensive sewage treatment device which is convenient for replacing a rotary disc aerator, comprising a reducer, a driving motor, a coupling, a main shaft, a bearing seat and an aeration disc, wherein the driving motor is mounted on the top surface of the reducer, the coupling is mounted on the right side surface of the reducer, the right end of the coupling is connected to the main shaft, the right end of the main shaft is connected to the bearing seat, a plurality of aeration discs are mounted at equal distances on the surface of the main shaft, and each aeration disc is formed by splicing two aeration circular arc discs; a stopping mechanism can be used to fix the mounting component and the positioning base together, so as to ensure that the mounting component cannot slide along the axis direction of the main shaft, so that the aeration circular arc disc cannot be displaced along the axis direction of the main shaft, and so as to ensure that the spacing between the aeration circular arc discs will not change, which helps to further increase the aeration effect, reduces the maintenance frequency, reduces the workload of workers, increases the duration of sewage treatment, makes sewage treatment more efficient, and improves the practicability of the device.

The present invention discloses an automatic wafer angle sorting system for improving positioning accuracy, improving measurement accuracy and avoiding wafer fragmentation. The present invention comprises a workbench, on which a clip-type loading mechanism, a direction testing mechanism, an angle testing mechanism and a sorting unloading tray are sequentially arranged, a first material transport module is arranged between the clip-type loading mechanism and the direction testing mechanism, a second material transport module is arranged between the direction testing mechanism and the angle testing mechanism, and a third material transport module is arranged between the angle testing mechanism and the sorting unloading tray; the direction testing mechanism comprises a direct drive motor and a direction testing seat connected to the direct drive motor, an optical fiber sensor is arranged obliquely above the direction testing seat, and the angle testing mechanism comprises an X-ray transmitter, a test suction cup seat and an X-ray receiver which are sequentially distributed on the workbench in an oblique line, and electric finger positioning devices are arranged at both ends of the test suction cup seat. The present invention is applied to the technical field of wafer angle sorting equipment.

This invention discloses a combined gas detection device and its detection method, belonging to the field of air pollution detection technology. It includes a mounting base, with an intake cylinder fixedly connected inside the mounting base. A filter element is fixedly connected inside the intake cylinder, and two filter elements are arranged in a linear array on the upper and lower sides of the intake cylinder. A servo motor is fixedly connected to the top of the upper filter element. This invention achieves automatic sensing and response to blockage of the active intake port by setting an electromagnetic guide ring, a pressure-sensitive washer, and a guide magnetic ring on the top surface of the extension sleeve, and by opening an auxiliary intake hole on the outer circumference of the extension sleeve. When the pressure-sensitive washer detects an abnormal pressure due to blockage, the electromagnetic guide ring is energized to generate magnetism and drive the extension sleeve to extend downwards, exposing the originally hidden auxiliary intake hole to the external environment, thereby automatically switching or expanding the gas intake channel.

The utility model relates to the technical field of electric power construction, and discloses electric power fireproof protection equipment which comprises a main body mechanism, a fire extinguishing mechanism and an auxiliary mechanism, the fire extinguishing mechanism is located at the left end of the main body mechanism, the auxiliary mechanism is located at the lower end of the main body mechanism, and the main body mechanism comprises a first fixing column, a groove and a lifting motor. The groove is fixedly formed in the left end of the first fixing column, the lifting motor is fixedly installed at the upper end of the first fixing column, and the transmission end of the lifting motor extends into the groove. The main body mechanism further comprises a lead screw, a positioning nut, a power box and a controller, the lead screw is fixedly installed at the lower end of the transmission end of the lifting motor, and the lead screw is movably connected with the groove. According to the electric power fireproof protection equipment, by installing the main body mechanism, the height of the fireproof protection equipment can be conveniently adjusted according to the height of electric power equipment, a fire extinguishing spray head can be accurately aligned with a fire source, the fire extinguishing effect is improved, and safety and adaptability are improved.

The utility model discloses a patient infusion flow rate adjusting device, and relates to the technical field of medical instruments. A pressing plate is arranged on one side of the shell, a notch is formed in the face, facing the pressing plate, of the shell, a clamping plate is fixedly connected to the face, facing the shell, of the pressing plate, the clamping plate corresponds to and is matched with the notch, an infusion tube is arranged between the shell and the pressing plate, and a micro motor is arranged in the shell. The output shaft end of the micro motor is fixedly connected with a worm, the side wall of the worm is meshed with a worm gear, a rotating shaft is fixedly connected to the middle of the side wall of the worm gear in a penetrating mode, one end of the rotating shaft is fixedly connected with a screw, and the side wall of the screw is sleeved with an adjusting plate in a threaded mode; the infusion flow rate adjusting device is good in safety, can effectively prevent an infusion person or other people from adjusting the infusion flow rate arbitrarily after medical staff adjust the flow rate, further avoids some negative effects or sequelae caused by the abnormal infusion flow rate, and is convenient to install and capable of being used repeatedly.

This utility model relates to the field of heating appliances and discloses a heating module suitable for liquid heating equipment, including a heating element and a cover plate. A heating layer made of thick-film heating material is provided on one side of the heating element; a flow guide groove is provided on the other side of the heating element. The cover plate and the flow guide groove form a medium channel that allows the working medium to flow. This utility model integrates the heating plate and the water circuit board into a single structure, solving the problem of poor consistency caused by deformation due to the independent structures of the heating plate and water circuit board in the prior art. Furthermore, the sidewalls of the flow guide groove form reinforcing ribs, enhancing the structural strength of the heating element, improving its resistance to deformation, and increasing the heating controllability of the heating module. Simultaneously, the working medium flows in a designated direction to achieve gradual heating of the working medium, improving the temperature control accuracy of the heating module. This utility model also provides a liquid heating device.

The invention discloses a fire-fighting and thermal management integrated CO2 system and a control method thereof, and belongs to the field of vehicle thermal management, the fire-fighting and thermal management integrated CO2 system comprises a direct cooling circulation module and a direct cooling module, and an inlet and an outlet of the direct cooling module are connected with the direct cooling circulation module; the direct cooling module comprises a direct cooling plate and a battery pack, and the battery pack is arranged on the direct cooling plate; the direct cooling plate comprises a composite PCM material and a uniform-temperature cooling plate, the composite PCM material is embedded into the uniform-temperature cooling plate, the surface of the composite PCM material is flush with the surface of the uniform-temperature cooling plate, and a working medium of the direct cooling circulation module is carbon dioxide; the direct cooling circulation module comprises a compressor, an air cooling heat exchanger, an evaporator branch throttling valve, a battery cold plate branch throttling valve, a four-way reversing valve, a first evaporator, a second evaporator, a gas-liquid separator and a heat regenerator. The problem of thermal runaway of the battery in the battery thermal management system can be solved.

The anesthesia cannula for the surgical operation comprises a ventilation hose and an abutting mechanism arranged on the outer cylindrical surface of the ventilation hose, the abutting mechanism is located at the end, close to the outside, of the ventilation hose, and the abutting mechanism comprises an inflation assembly and an elastic assembly fixedly connected with the inflation assembly. The air inflation assembly comprises an air inflation part and a first air inflation line for supplying air to the air inflation part, the air inflation part is provided with an upper tooth socket and a lower tooth socket which are oppositely arranged, the upper tooth socket is provided with an upper abutting face abutting against the upper tooth face and an upper occlusal face making contact with the upper tooth tip end, and the lower tooth socket is provided with a lower abutting face abutting against the lower tooth face and an upper occlusal face making contact with the lower tooth tip end. The lower tooth socket is provided with a lower abutting face abutting against the lower tooth face and a lower occlusal face making contact with the tip end of the lower tooth. According to the anesthesia cannula for the surgical operation, the pressure of the ventilation hose on the throat of a patient can be relieved, and meanwhile the situation that the patient accidentally wakes up to tightly close the upper jaw and the lower jaw in a subconscious mode, and consequently negative effects are caused is avoided.

The utility model provides immune globulin freeze-drying equipment, which relates to the technical field of protein freeze-drying, and comprises a vacuum box, the surface of the vacuum box is rotatably connected with a box door, the inner wall of the vacuum box is fixedly provided with a refrigeration assembly, the inner wall of the vacuum box is rotatably connected with a rotating shaft, the surface of the rotating shaft is fixedly provided with a placing frame, and the placing frame is fixedly provided with an opening. A worm wheel is fixedly installed at the bottom end of the rotating shaft, a motor is fixedly installed on the bottom face of the vacuum box, a worm is installed at the output end of the motor, and a connecting rod is fixedly installed at the top end of the rotating shaft. The worm, the worm gear and the rotating shaft are driven by the motor, so that the placing frame can rotate, the rotating design ensures that immune globulin can be uniformly heated and freeze-dried, the uniformity and the quality of the freeze-drying effect are improved, meanwhile, the connecting rod and the top plate are driven to rotate the reflector when the rotating shaft rotates, the working state is visually indicated, and the working efficiency is improved. And a worker can be reminded that the equipment is running.

The application discloses an anti-skid tensioning wheel for automobile transmission and belongs to the technical field of tensioning wheels. The anti-skid tensioning wheel comprises a mounting seat, a pressure plate slidably connected to the mounting seat, a wheel frame slidably connected to the pressure plate, a pressure spring arranged on the pressure plate, and a tensioning wheel rotatably connected to the wheel frame. A non-circular insertion column is slidably connected to the wheel frame. An adjusting screw is rotatably connected to the pressure plate. A driving ring is rotatably connected to the mounting seat. The driving ring is in transmission connection with a transmission belt. The pressure plate and the wheel frame slide relative to each other to drive the non-circular insertion column to slide. When the pressure plate and the wheel frame are located at positions close to each other, the tensioning wheel keeps pressing the transmission belt. When the pressure plate and the wheel frame are located at positions far away from each other, the tensioning wheel slides to the transmission belt and further presses the transmission belt. When the transmission belt slips, the tensioning wheel slides to further press the transmission belt. After slipping, the tensioning wheel can provide tension to the transmission belt again. The transmission belt can be conveniently disassembled. The anti-skid tensioning wheel adopts a pure mechanical structure, and the failure rate is reduced.

This application provides a method and apparatus for transmitting interference signals, an electronic device, and a readable storage medium. The method for transmitting interference signals includes: acquiring the power received strength of a target signal that is correctly demodulated in a wireless communication system; wherein the target signal is a signal that a terminal needs to demodulate when accessing the wireless communication system; determining the transmission parameters of an interference signal based on the power received strength of the correctly demodulated target signal; and transmitting the interference signal based on the transmission parameters of the interference signal, so that a terminal located in the target area cannot correctly demodulate the target signal.

The invention discloses an infusion catheter risk prediction method and an infusion catheter, and relates to the technical field of medical treatment.The infusion catheter risk prediction method comprises the following steps that historical medical record data and physiological parameter data of a patient are obtained, and risk influence data of the infusion catheter are obtained; the risk influence data comprises an infection risk coefficient, an infusion catheter abnormal coefficient and a catheter blocking risk coefficient; constructing a risk prediction model based on a deep learning algorithm according to the risk influence data; evaluating the infusion catheter risk of the patient according to the risk prediction model; according to the method, by establishing the risk prediction model, the problems that an existing risk prediction method mostly depends on experience and intuition, a scientific and effective evaluation mechanism is lacked, and individual differences of different patients are insufficiently considered are solved.

The present invention belongs to the technical field of washing machines, and discloses a washing machine, including a washing tub and a filtering device, wherein the bottom wall of the washing tub is provided with a drainage portion for discharging washing water in the washing tub, and the filtering device is arranged on the drainage portion of the washing tub. When the washing machine of the present invention is draining water, the filtering device arranged at the drainage port of the bottom wall of the washing tub can effectively filter foreign matter in the washing water, thereby preventing foreign matter from entering the drainage system and affecting the normal operation of the washing machine. In addition, the filtering device is detachably connected to the washing tub, which is convenient for cleaning.

The present invention discloses a remote rehabilitation training system based on nine axes and pressure sensors, which relates to the field of electronic digital data processing, including a target course selection perception module, a target course verification data statistics module, a rehabilitation data matching module and a remote rehabilitation training guidance module. The present invention can realize high-precision motion data capture and real-time analysis through nine axes and pressure sensors, and support users to perform personalized rehabilitation training in a remote environment. The system can perceive the rehabilitation training courses selected by the user and perform remote rehabilitation training according to the selected rehabilitation training courses, simultaneously match and comprehensively analyze rehabilitation data, and simultaneously provide accurate training guidance, providing effective support and guarantee for the user's rehabilitation training.

The invention relates to the technical field of power supply compatibility, in particular to a power supply input compatible circuit and device, and the circuit is characterized in that the input end of a voltage stabilization filtering module receives an external power supply input signal, and the output end is connected with the input end of a voltage recognition module; one output end of the voltage identification module is connected with the input end of the first voltage switch module, and the other output end is connected with the input end of the second voltage switch module; the output end of the first voltage switch module is connected with a load circuit; the output end of the second voltage switch module is connected with the input end of the voltage conversion module, and the second voltage switch module is used for converting the voltage value of the power supply signal from the second voltage to the first voltage and outputting the converted power supply signal to the load circuit; the voltage conversion module is connected with the load circuit. According to the invention, it can be ensured that the voltage values of the power supply signals finally input to the load circuit are uniform, so that negative effects caused by wrong use of the power adapter are avoided, and the user experience and the availability of equipment are improved.

The invention belongs to the technical field of healthy food, and relates to a healthy weight-losing meal replacement formula, which comprises 6 parts of carbohydrate, 2 parts of protein, 1.5 parts of fat, 0.5 part of vitamin, 6 parts of dietary fiber and 0.1 part of food additive. According to the healthy weight-losing meal replacement formula disclosed by the invention, the calorie intake is controlled and the satiety is increased, so that long-term weight management is facilitated, and adverse consequences caused by blind dieting are avoided; and the nutrition imbalance caused by intake of single food is avoided by balancing intake of various nutrients. By replacing high-calorie and high-fat food, the intake of unhealthy food is reduced.

The invention relates to an energy storage converter. The energy storage converter comprises a control unit, an air cooling system and a system heating component. The air cooling system is used for cooling system heating components and comprises a fan, a fault feedback circuit connected with the control unit and a PWM signal generating circuit. The control unit judges that the energy storage converter is in a standby state, a starting state or a working state, when the energy storage converter is in the working state, the fault feedback circuit is stopped, when the energy storage converter is in the starting state, the PWM signal generating circuit and the fault feedback circuit are started, the PWM signal generating circuit provides a PWM signal for the fan to enable the fan to operate, and the fault feedback circuit is started; the fault feedback circuit detects whether the fan is stalled or not, if the fan is stalled, the fault feedback circuit outputs a fan fault signal, and the control unit is used for giving an alarm at least according to the fan fault signal. By adopting the method, fault detection of the energy storage converter on the fan can be realized, and the reliability of fault detection is improved.