120results about How to "Avoid failure situations" patented technology

The invention discloses a discharging method and device of a power battery, a battery management system and an electric vehicle. The method comprises the steps that a current charge state and the current temperature of the power battery are collected, and the maximum discharging power of the power battery is obtained; the minimum monomer voltage of the power battery is detected, and whether the minimum monomer voltage is less than a first preset threshold or not is judged; if the minimum monomer voltage is less than the first preset threshold, the maximum discharging power is corrected to a preset power value until the minimum monomer voltage is larger than a second preset threshold, and correcting is stopped, wherein the second preset threshold is larger than the first preset threshold. According to the method, the maximum discharging power of the power battery can be corrected according to the minimum monomer voltage of the power battery, so that the situation of faults caused by overdischarging and voltage shortage of the power battery is avoided, the using efficiency of the battery is improved, the service life of the battery is prolonged, reliability of the battery is ensuredeffectively, and the method is simple and easy to achieve.

The invention belongs to the field of air conditioners and provides a control method and system of an air conditioner and the air conditioner to solve the problems that when a temperature sensor and / or a humidity sensor of an existing air conditioner breaks down, normal use of the air conditioner is influenced, and a user uses inconveniently. The control method comprises the steps that temperatureinformation and / or humidity information of a plurality of reference air conditioners is obtained; and according to the temperature information and / or the humidity information of the multiple reference air conditioners, operating parameters of the air conditioner are selectively adjusted. The control system comprises a receiving module, a calculating module, a judging module, a control module anda cloud server. When a temperature sensor and / or a humidity sensor of the air conditioner breaks down, the temperature sensor and / or the humidity sensor of the current air conditioner can be correctedby obtaining the temperature information and / or the humidity information of the multiple reference air conditioners, thus normal operating of the current air conditioner is ensured, and the user experience is improved.

The invention discloses a method for achieving server load balancing. The method mainly comprises the steps that the initial capacity value of each server is set, and authentication service access requests of client terminals are distributed according to the initial capacity values; the self-learning ability value of each server is set according to the interaction time of the authentication service access request of the corresponding client terminal, and dynamic regulation is further conducted; when one client terminal initiates the authentication service access request to the corresponding server, the authentication service access request initiated by the client terminal is distributed to the corresponding server according to the sum of the initial capacity values and the self-learning ability values of all the servers. According to the method for achieving server load balancing, the concept of server capacity values is introduced so that service access traffic can be intelligently distributed, the problem that one single server is overloaded in a traditional fixed active-standby mode, so that service data traffic is not reasonably distributed is solved, the servers are made to be in a stable and efficient working state for a long time, and therefore user service normal operation can be guaranteed.

The invention discloses a fire monitoring terminal and a fire safety system. The fire monitoring terminal comprises a monitoring processor and a memory. The monitoring processing is allocated to execute the following steps: acquiring geo-spatial location information of fire control facilities, and constructing a fire control facility distribution GIS three-dimensional map according to the types and corresponding geo-spatial location information of the fire control facilities; receiving current status information of the fire control facilities, comparing the current status information and corresponding preset normal threshold range to judge whether the corresponding fire control facilities are abnormal, and marking abnormal fire control facilities if yes and displaying in the fire control facility distribution GIS three-dimensional map; and sending the fire control facility distribution GIS three-dimensional map with the marked fire control facilities to corresponding clients. Accordingto the invention, location information of the fault fire control facilities can be searched timely and accurately, the case that the fire control facilities break down when the fire happens is avoided, and smooth fire extinguishing work can be guaranteed.

The embodiment of the invention relates to the circuit technical field, and discloses a radio-frequency power amplifier real-time monitoring and protecting circuit. The circuit comprises: a voltage / current detection device and a AND gate chip. The voltage / current detection device is used for: acquiring the working voltage and the working current of the power amplifier according to the voltage andthe current inputted by an external power supply; determining whether the working voltage of the power amplifier is over-limit or not, and outputting a voltage over-limit alarm level indication signalby the first output end of the voltage / current detection device; determining whether the working current of the power amplifier is over-limit or not, and outputting a current over-limit alarm level indication signal by the second output end of the voltage / current detection device. The AND gate chip outputs a control signal according to the two indication signals to control the power supply of theradio frequency power amplifier to be turned on and off by a rapid power-off protection device. According to the radio-frequency power amplifier real-time monitoring and protecting circuit, the powersupply of the radio-frequency power amplifier is directly controlled to be turned on and off without processing and judging by a master control device; the method has the advantages that the protection is rapid, the real-time performance is high, the circuit area is compact, the power consumption is low, and the like.

The invention discloses a medium-voltage power supply control method of CRH5 type multiple units, relates to the technical field of medium-voltage power supply of multiple units. The invention aims to solve the problem that an existing medium-voltage power supply system of the multiple units uses one power supply bus to supply power to the loads of the whole multiple units, so that when the bus is in failure, the breakdown of the medium-voltage power supply system of the whole multiple units is caused. The medium-voltage power supply control method comprises a medium-voltage power supply bus A and a medium-voltage power supply bus B; auxiliary converters arranged in an MC01 multiple unit, an MH04 multiple unit and an M08 multiple unit are connected to the medium-voltage power supply bus A; auxiliary converters arranged in an M02 multiple unit and an M07 multiple unit are connected to the medium-voltage power supply bus B; medium-voltage contactor boxes are respectively arranged in a TP03 multiple unit, the MH04 multiple unit, a TB05 multiple unit and a TP06 multiple unit; one or more contactors are arranged in each of the medium-voltage contactor boxes; and the medium-voltage power supply bus A and the medium-voltage power supply bus B are connected through the contactors in the medium-voltage contactor boxes located in the TP03 multiple unit, the MH04 multiple unit, the TB05 multiple unit and the TP06 multiple unit. According to the method disclosed by the invention, the situation that the failure of the power supply system of the whole multiple units is caused by failure of a single component in the application process is avoided, and the normal power supply of the whole multiple units can be guaranteed.

The invention discloses a battery micro-fault diagnosis method based on battery pack consistency evolution and belongs to the technical field of batteries. The method comprises steps of a plurality of historical charging section voltage data being used, a battery charging voltage curve (CCVC) transformation principle being utilized, battery pack consistency quantitative optimization calculation being carried out by using an adaptive inertia weight particle swarm algorithm, and the similarity matching degree (average Euclidean distance) of the battery charging voltage curve being used as a fitness value, and quantitative parameters representing the consistency condition of the battery pack are obtained; and then standardizing the consistency parameters to obtain a relative position Z-Score representing the relative position of the battery consistency in the battery pack, calculating the standard deviation of the relative position, and calculating the change score of the battery consistency; and carrying out battery micro-fault identification by using an abnormal value detection method based on a 3 sigma criterion, and finding out a fault battery with abnormal consistency evolution. The method is advantaged in that effectiveness of the fault diagnosis method is proved by using partial charging section data of a fault real vehicle battery data set to perform an experiment.

The invention discloses an air conditioner. The air conditioner comprises an outdoor unit, wherein the outdoor unit comprises an electric heating belt for heating compressor lubricating oil and evaporating a liquid-state refrigerant in lubricating oil, an outdoor fan for conveying outdoor air to an outdoor heat exchanger, and a control part which is configured to obtain a gas exhaust temperature of the compressor, an outdoor coiled tube temperature and an outdoor environment temperature, determine gas exhaust superheat degree according to the gas exhaust temperature and the outdoor coiled tubetemperature while the air conditioner is detected to enter a low-temperature refrigerating control mode, control a working state of the electric heating belt according to the gas exhaust superheat degree, calculate temperature difference between the outdoor coiled tube temperature and outdoor environment temperature, and control rotation speed of an outdoor fan according to the temperature difference. According to the air conditioner disclosed by the invention, low-temperature refrigerating control can be realized by controlling an operation state of the outdoor fan and the electric heating belt, so that high-low pressure of an air conditioner system can be improved.

The invention discloses a fireproof alarm type explosion-proof control cabinet which comprises a cabinet body. A sucker is fixedly connected to the inner wall of the top of the cabinet body, an air bag is fixedly connected to the outer wall of one end of the sucker, a protective cover is arranged on the inner wall of the top of the cabinet body, and supporting rods are arranged on the inner wallsof the two sides of the protective cover. When a temperature sensor detects that the interior of the cabinet body exceeds a set threshold value, an electric push rod is automatically started, the electric push rod drives a steel needle to extend to puncture an air bag, and therefore dry powder fire extinguishing materials contained in the air bag can be sprayed out, and fire extinguishing work canbe conducted on the cabinet body. When the air bag is punctured, larger air flow is generated and blows the first fan blades to be rotated,, meanwhile, the multiple fan blades are connected through atraction rope, and therefore the multiple fan blades can irregularly rotate when the air bag explodes, sprayed dry powder extinguishing materials can be evenly dispersed, and fire disasters caused bydead corners are avoided.

The invention relates to the technical field of monitors, and discloses a neurological intensive monitor which comprises a protection cover. Supports are fixedly connected with the four corners of thebottom of the protection cover respectively. Wheels are fixedly installed at the lower ends of the supports. The middles of the side faces of the supports are in threaded connection with first bolts.The outer surfaces of the opposite ends of the two first bolts penetrate through the supports and are fixedly sleeved with first bearings. The ends, away from the first bolts, of the first bearings are fixedly connected with connecting blocks. The ends, away from the first bearings, of the connecting blocks are fixedly connected with vertical plates. The ends, away from the first bolts, of the vertical plates are fixedly connected with slide rails. The middles of the tops of the connecting blocks are in threaded connection with second bolts. The problems that a traditional neurological intensive monitor has no damping function, cannot be effectively fixed and cannot resist water and dust are solved, and the effects of resisting water and dust, being good in fixing effect, having a dampingfunction and preventing the monitor from failures caused by external force are achieved.

The invention relates to the field of air purification, and in particular relates to an organic waste gas plasma purifier. The organic waste gas plasma purifier comprises two or more plasma purifying box bodies, wherein the two adjacent plasma purifying box bodies are connected through a box body connecting piece. A core box is internally provided with a core track, and the core track is provided with two plasma cores in parallel. A power distribution box is internally provided with a plasma power supply communicated with the plasma cores, a list of twenty rows of horizontal strip-shaped air outlets in matrix arrangement are formed in a left side plate and a right side plate of the power distribution box, air inlet fans are respectively arranged on the left and right sides of the bottom of the power distribution box, and the air inlet fans correspond to the air outlets. The organic waste gas plasma purifier is assembled freely by the plurality of box bodies, and is convenient to transport; the purifier is formed that the inside plasma cores are provided with the corresponding core track, so that the plasma cores are extremely convenient to install and maintain; meanwhile, the independent power distribution box is arranged in a core power supply, so that the maintenance and the heat dissipation of the power supply are convenient.

The invention relates to the wireless sensor network technology field and discloses a fault recovery method of a wireless sensor network. In the invention, through a leading relay node (LRN), an isolated area which loses connection is reconnected to a nearest connected set (CS), and then the CSs are connected so as to realize a purpose of recovering network connectivity. Because the LRN in the each isolated area only needs to move to the CS which is nearest to the LRN itself, a shift distance can be substantially shortened and node energy can be saved too. In the invention, according to a density of the LRN, CS division is performed to the whole network and simultaneously, during a connection process of the different CSs, a density approach method is still used to perform the fan-shaped division so that an LRN optimization process between the isolated areas can be simplified and complexity of algorithm can be reduced.

The invention relates to a method for performing a hot plug test on an EIO board card under a Linux system. The method comprises the following steps of opening an IPMI service in the Linux system; loading an IPMI equipment driving script in the Linux system; adding permission to the IPMI equipment driving script, thus allowing the IPMI equipment driving script to be editable; and performing hot plug operation on the EIO board card. According to the method provided by the invention, the EIO board card is unloaded or loaded by removing the script or installing the script in the Linux system, sothat the hot plug test on the EIO board card is implemented, the situation that a host or hardware is failed due to short circuit of a hardware circuit when hot plug is performed by only using a hardware circuit way can be avoided, and thus availability, disaster recovery capability, flexibility and expansibility of a server can be greatly improved.

The invention belongs to the related field of keys, and discloses a key for a mobile terminal and the mobile terminal. The key comprises a conductive deformation part, an inductor that is arranged to be opposite to the deformation part and generates mutual inductance, and a detection device used for detecting the current / magnetic field of the inductor, wherein the deformation part is located on a housing of the mobile terminal, and the inductor and the detection device are located in the housing and are connected to a processor in the mobile terminal. According to the invention, by means of the mutual inductance between the deformation part and the inductor, when the deformation part is pressed, the eddy current at the deformation part changes, the current or the magnetic field of the inductor correspondingly changes, the detection device detects the current or the magnetic field of the inductor and sends a corresponding key value to the processor of the mobile terminal, and the processor controls the mobile terminal to generate a corresponding operation. The problem that an existing mechanical key is frequently pressed, resulting in that a pressing key and an elastic key piece are damaged by attrition, is avoided. Meanwhile, dust and vapor are prevented from entering the mobile terminal to cause a fault of the processor.

The invention discloses a ventilation fault prompt method. Air volume detection signals at the equipment ventilation port position are obtained; the air volume detection signals are detected, and whether equipment is in the normal ventilation work state or not is judged; and if it is judged that the equipment is not in the normal ventilation work state, alarming prompt information is sent. A convenient ventilation fault prompt scheme is provided, no requirements exist for the usage habits and the equipment cabinet maintaining awareness of usage and maintenance personnel, prompt can be made forthe equipment cabinet ventilation fault in time, the situation of faults due to poor heat dissipation of the whole machine is avoided, and long-term normal running of the whole machine is guaranteed.In addition, the invention further provides a ventilation fault prompt device and facility with above technical effects and a computer readable storage medium.

The invention relates to the technical field of computer networks, and discloses a computer network device box capable of wiping away dust on the bottom of an inner wall. The computer network device box comprises a device box body. A first installation plate is fixedly connected between the left side and the right side of the inner wall of the device box body. A storage battery is fixedly installed on the left side of the top of the first installation plate. A bearing pedestal is fixedly installed on the right side of the bottom of the first installation plate. A guide rail is fixedly connected with the left side of the inner wall of the device box body. A slider is clamped on the guide rail. A second installation plate is fixedly connected with the right end of the slider. A threaded pipeis fixedly connected with the right end of the second installation plate. A first threaded rod is in threaded connection with an inner ring of the threaded pipe. The problems that dust on the inner bottom wall of a box body is difficult to clean away, toubles and labor are wasted, equipment in the box body can be affected to a certain extent, the cooling effect is poor and a computer is laggy aresolved, and the effects of being beneficial for wiping and cleaning, saving troubles and labor and being effective in cooling are achieved.

The invention discloses ecological environment restoration equipment, and relates to the technical field of environmental ecology. The equipment comprises a workbench, wherein a mounting box and a water pumping cylinder are fixedly mounted on the outer surface of the top of the workbench, one end of the water pumping cylinder penetrates through the workbench and extends to the bottom of the workbench, a rotating rod is rotatably mounted at the top of the inner side of the water pumping cylinder, spiral blades are fixedly mounted on the outer wall of the rotating rod, and a first motor is fixedly mounted on the outer surface of the top of the water pumping cylinder. According to the equipment, after sewage is filtered and purified, residual impurities can be collected on an activated carbonadsorption layer and a filter screen, and are then centralized through a drawer type structure of a treatment box, so that secondary pollution to a water area caused by accumulation of impurities inthe sewage is avoided while cleaning is facilitated for a user, the user can clean and maintain the equipment conveniently through matching of sliding grooves and sliding blocks, and the service lifetime of the equipment is prolonged.

The invention discloses a server power supply forced current sharing method and system, equipment and a storage medium. The server power supply forced current sharing method comprises the steps of: reading output currents of a plurality of server power supplies, and calculating the total output current; in response to voltage drop of a current-sharing bus, calculating a current value needing to beoutput by each server power supply according to the total output current and a preset proportion, and taking the current value needing to be output as a target current value; sequentially adjusting the output voltage of each server power supply according to the change sequence of the current values from small to large, and keeping output voltages of other server power supplies unchanged every time the current server power supply is adjusted; and judging whether the output currents of the server power supplies reach the respective target current values or not, and stopping adjustment in response to the fact that the output currents of the server power supplies reach the respective target current values. According to the server power supply forced current sharing method and the system, theserver power supplies adjusted, so that a fault caused by bus voltage drop due to short circuit of the current-sharing bus or other anomalies is avoided, and the stability of the server power suppliesis improved.

The invention discloses an intelligent power-off method. A power-off scheme database is established and the generative network is trained based on the power-off scheme database; then the power-off flow is intercepted and the current security and running state of the terminal is obtained, when the power-off flow of the terminal is detected; then the security and running state is sent to the generative network so that the generative network is enabled to output the recommended power-off scheme; and finally the power-off operation corresponding to the scheme selection instruction is executed whenthe scheme selection instruction triggered by the user based on the scheme selection interface is obtained in a preset period of time. The invention also discloses an intelligent power-off device anda computer readable storage medium. According to the method, different power-off schemes can be generated according to the current actual condition of different terminals, and the user can select whether to execute the power-off scheme recommended by the system so as to ensure unmanned intelligent power-off process and effectively improve the speed and the security of next startup.

The invention discloses a balanced output system based on a multi-winding transformer. The system comprises a battery unit module, a multi-winding transformer, two groups of switch tubes, a controller and a filter module, and when the output is carried out, the controller generates a PWM signal with a fixed duty ratio to drive a primary side switch tube and control a secondary side switch tube to be in an off state; equalization of the battery pack is achieved through forward excitation, and a secondary side output function is achieved through flyback excitation; and when the battery unit module is charged, the controller generates the PWM signal with the fixed duty ratio to drive the secondary side switch tube, the primary side switch tube is controlled to be in an off state, and the function of charging the primary side battery unit module is achieved through flyback. The multi-winding transformer is used for balancing the battery unit modules, the secondary side of the transformer is used for achieving external output, the available capacity of the battery pack is improved, the service life of the battery pack is prolonged, and meanwhile the integration level of a balance system is improved.

The invention discloses a method and device for controlling current or power of power batteries. The method comprises the steps of obtaining the current voltage of a power battery; and if the fact that the current voltage achieves first preset voltage is determined, gradually decreasing the maximum allowed operation current or maximum allowed operation power of the power battery until the fluctuation of the voltage of the power battery before achieving second preset voltage is located in a preset range. If the power battery is located in a charging state, the fist preset voltage is smaller than the second preset voltage and the second preset voltage is not higher than cut-off voltage; and if the power battery is located in a discharging state, the first preset voltage is greater than the second preset voltage and the second preset voltage is not lower than the cut-off voltage. Visibly, through gradually reducing the maximum allowed operation current or maximum allowed operation power of the power battery, the voltage of the power battery can be restrained from continuously changing to the cut-off voltage in time, so as to effectively avoid the condition that vehicle faults are caused as the voltage of the power battery achieves the cut-off voltage.

The invention provides an 8-wiring-system network card. After an 8-core network cable is connected with a network card interface, four idle core wires are in parallel connection with four non-idle core wires and then are connected with a network card chip. The 8-wiring-system network card is characterized in that when one core wire of the 8-core network cable is disconnected, the network card work is not influenced. The four idle core wires can be in parallel connection with the four non-idle core wires before being led into a network card isolation transformer, and then are connected with the network card chip through the network card isolation transformer. In addition, the four idle core wires can be led into a network card isolation transformer, then are in parallel connection with the four non-idle core wires, and finally are connected with the network card chip. The two design ideas are identical, namely the four idle core wires are in parallel connection with the four non-idle core wires and then are connected with the network card chip.

The invention discloses a network control method, a data forwarding method and a software defined network. The network control method comprises the following steps of: controlling a network; acquiringtopological information of a data layer in the software-defined network, configuring an ideal transmission path for any data stream on the data layer according to the topological information; distributing one or more expected paths in the ideal transmission path according to a preset dynamic sampling mechanism, and acquiring an actual path of each sampled data packet passing through the data layer, performing path consistency verification on the actual path by utilizing the expected path, and positioning an error switch from the actual path when the actual path does not pass the path consistency verification. Due to the fact that the control layer locates the wrong switch from the actual path when the actual path of the data packet does not pass the path consistency verification, the fault situation of a single-point switch can be avoided in the dynamic sampling and data forwarding process of the data flow, and the robustness of the path consistency verification scheme can be improved.

The invention relates to a resource arrangement method, apparatus and device, and a storage medium. The resource arrangement method comprises the steps of obtaining an application identifier; according to the application identifier, determining the current running time and resource overhead of the application and a pre-constructed experience curve; the experience curve comprises a corresponding relation between historical operation time and a threshold range of resource overhead; detecting whether the resource overhead meets a first arrangement updating condition or not according to the experience curve and the running time; the first arrangement updating condition comprises that the resource overhead is not in the threshold range of the corresponding operation time in the experience curve; and if the resource overhead meets the first arrangement updating condition, generating a first arrangement scheme according to a first preset arrangement generation rule. Therefore, by integrating the use condition of the current resource and the consumption condition of the historical resource, the resource utilization rate and the arrangement efficiency can be effectively improved, a series of faults caused by resource vacancy or resource insufficiency are avoided, and a more reasonable arrangement scheme is provided for a user.

The invention relates to the technical field of power equipment, and specifically relates to an energy-saving temperature control power distribution cabinet. The cabinet comprises a cabinet body, a central processor, a temperature sensor and a humidity sensor, wherein the central processor, the temperature sensor and the humidity sensor are disposed in the cabinet body. The top cover of the cabinet body is provided with an angle adjustment device, and the angle adjustment device is provided with a solar panel. A part, adjacent to the edge, of the top cover is provided with a luminosity sensor.The cabinet body is provided with an air exhaust pipe, and the air exhaust pipe comprises an inner port and an outer port. The inner port is provided with an exhaust fan, and the outer port is provided with a filter screen. The outer end of the outer port is an inclined surface, and the inclination angle of the filter screen is consistent with the inclination angle of the inclined surface. The outer port is provided with a diversion trench, and the diversion trench is located below the filter screen. According to the technical scheme of the invention, the cabinet saves energy, dissipates heat, decreases the temperature, has the good dustproof effect, can automatically remove dust, is high in reliability, is good in safety, and is durable.

The invention discloses a low-altitude traffic enforcement system based on an unmanned aerial vehicle. The system comprises an unmanned aerial vehicle module, a ground control terminal and a radio frequency identification module, wherein the unmanned aerial vehicle module is internally provided with an aircraft, and the aircraft is provided with load equipment; the unmanned aerial vehicle module is connected with the ground control terminal and a network transmission module; the unmanned aerial vehicle module is connected with the ground control terminal through the network transmission module; and the radio frequency identification module is used for identifying graphics shot by the unmanned aerial vehicle and acquired information. The invention further discloses a use method of the abovesystem. The system provides convenience for people to monitor whether or not a vehicle violates the law in real time, when the vehicle violates the law, the aircraft automatically switches to an autonomous control mode to track the vehicle, thereby avoiding the vehicle from escaping after an illegal behavior occurs, so that the traffic enforcement efficiency of the traffic control department is greatly improved, and the aircraft avoids the occurrence of the malfunction of the aircraft during a pneumatic process through self-detection, thereby greatly improving the use safety of the enforcement system.

The invention discloses an efficient automobile fuel high-pressure pump. The efficient automobile fuel high-pressure pump comprises a conveying adjusting oil tank, a filter box, a transmission box andan oil conveying channel, oil inlets are formed in the two ends of one side of the bottom of the transmission box, the oil conveying channel is formed in one side of the transmission box, a driving gear and a driven gear are arranged on one side of the transmission box, the filter box is installed at the top of the transmission box, the conveying adjusting oil tank is mounted at the top of the filter tank, and an oil conveying opening is formed in the top of the conveying adjusting oil tank. The automobile fuel high-pressure pump is simple in structure, the automatic gasoline conveying process can be completed only through cooperation of a first worm, a second worm, a third worm and a fourth worm, and the automobile fuel high-pressure pump has the advantages of being low in manufacturingcost and high in conveying efficiency; a filter plate is mounted in the filter box, so that the situation that impurities block an oil supply pipe and an automobile oil nozzle, and consequently an automobile breaks down is avoided; and a piston plate moves in an inner cavity of the conveying adjusting oil tank, the speed of gasoline output from the oil conveying opening is changed, and the gasoline output amount becomes controllable.

The invention relates to transformer detecting equipment, in particular to a transformer detection device which can realize electric leakage and overheat detection. The transformer detection device comprises a shell body, wherein the shell body is externally provided with an LED display screen, a control panel and an alarm device; the shell body is internally provided with a microprocessor and a monitor; the monitor comprises an electric leakage protector, an electric leakage collector, a wireless communicator and a power source; the power source is connected with the wireless communicator, the electric leakage protector is installed in a power supply loop of a transformer to be detected, and the electric leakage collector is installed between an outer shell of the transformer to be detected and the ground; a current sensor, a voltage sensor, and a temperature sensor are installed inside the shell body; the current sensor, the voltage sensor and the temperature sensor are electricallyconnected with an analog-to-digital converter in the shell body, and the analog-to-digital converter is electrically connected with the microprocessor; and the microprocessor is further connected witha memory module.