97results about How to "No damage issues" patented technology

The invention discloses a vehicle-mounted multimedia device and a control method thereof. The vehicle-mounted multimedia device comprises a vehicle-mounted computer, an automobile state monitor, and a CAN-USB (Controller Area Network-Universal Serial Bus) singlechip which is connected with the vehicle-mounted computer and the automobile state monitor. The control method comprises the following steps: powering on or resetting the CAN-USB singlechip, and executing a bootstrap program; performing CRC (Cyclic Redundancy Check) on a firmware file stored in the CAN-USB singlechip by using the bootstrap program; if the CRC is passed, loading the firmware file through the CAN-USB singlechip, acquiring the monitoring data of the automobile state monitor through a CAN interface, converting the monitoring data into USB interface data, and transmitting the USB interface data to the vehicle-mounted computer; if the CRC fails, updating the firmware file from the vehicle-mounted computer or a backup storage area inside the singlechip by using the CAN-USB singlechip. By adopting the vehicle-mounted multimedia device and the control method thereof, unrecoverable damages to the vehicle-mounted computer due to no response of the program caused by failure in firmware upgrade in the vehicle-mounted CAN-USB singlechip can be avoided, and the reliability of the CAN-USB singlechip and the stability of the vehicle-mounted computer are improved.

The invention provides a method for colour space conversion of an image sequence. Image files in the image sequence is extracted, and pixels of each image file is extracted to perform the following steps: determining values R, G and B of pixels extracted currently; searching values R', G' and B' after conversation correction corresponding to the values R, G and B according to a preset RGB conversion correcting table; converting colour space of the values R', G' and B' into values X, Y and Z; searching values X', Y' and Z' after conversion correction corresponding to values X, Y and Z according to a preset XYZ conversion correcting table; and substituting the values X', Y' and Z' into values X, Y and Z. By adopting the invention, the time for encoding digital films can be shortened.

A method for arranging water stops in a box body jacking process comprises the following steps: forming grooves in the middle of the front end surface of each box body and the inner side edge part of the box body respectively during prefabrication of the box body, and pre-burying one sides of water stops into concrete on the inner sides of the grooves; arranging plastic extrusion plates on the upper and lower surfaces of the outer parts of the water stops in the grooves, and arranging fair-faced concrete plates between the plastic extrusion plates and the top and bottom surfaces of the grooves; tightly sealing the outer side end ports of the grooves; setting up a template at the joint of every two box bodies and casting concrete. According to the method, two circles of grooves are respectively formed in the middle of the front end surface of each box body and the inner side edge part of the box body during prefabrication of the box body, meanwhile the water stops are pre-buried in the grooves, and the whole structure of each water stop is not exposed, so that the problem of damage caused by jacking and earth cutting operations of an excavator in the box body jacking process is avoided; besides, construction of the water stops is finished at one step during prefabrication of the box bodies, and after-treatment is not needed, so that time and labor can be saved; in addition, compared with the method of implanting after chiseling, the method provided by the invention shortens the construction period.

The invention discloses an efficient residual pumping light attenuation method, relating to a method for leakage of optical fiber laser residual pumping light. The method is characterized by comprising the following steps of: removing a cladding layer from the position needing pumping attenuation on an optical fiber; then, manufacturing a long-period optical fiber grating at the middle part of an optical fiber section with the cladding layer being removed so that a bandstop spectral curve of the grating is matched with a pumping spectrum to form attenuation on residual pumping light but not to attenuate a signal light of the optical fiber laser. In order to prevent the leaked residual pumping light from damaging other elements, a metal sleeve which is used for absorbing the leaked pumping light and has favorable heat radiation capability can be sleeved for shielding the pumping light.

The invention relates to a construction carrying intelligent robot based on a parallel serial structure. The construction carrying intelligent robot comprises a carrying platform, parallel serial vibration tables, walking devices and tracks. The number of the parallel serial vibration tables is four, and the number of the walking devices is four. The parallel serial vibration tables are located at the four top corner positions of the carrying platform correspondingly. The walking devices are located under the parallel serial vibration tables. The upper ends of the walking devices are connected with the lower ends of the parallel serial vibration tables. The lower ends of the walking devices are arranged on the tracks. According to the construction carrying intelligent robot, a four-RPS four-freedom-degree parallel mechanism is applied to the parallel serial vibration tables, the construction carrying intelligent robot can walk in the direction of total four freedom degrees including one-translation and three-rotation in the space, the characteristics of good damping performance and high bearing capability of the four-RPS four-freedom-degree parallel mechanism are fully utilized, and therefore even when the construction carrying intelligent robot walks on the construction site field with the uneven road surface and the poor road surface condition, the problem of construction material slipping or damage of materials under the strong vibration situation cannot be caused, and the construction materials are protected to a certain degree in the carrying process.

An laser driven light source comprises a bulb that encloses a discharge medium which is activated by a laser beam to generate a plasma. It is an object of the present invention to provide a shield from a laser beam, which passes through plasma generated in a bulb without being absorbed therein. A laser driven light source includes a bulb that encloses a discharge medium, wherein plasma is generated in the bulb by a laser beam focused in the bulb, and a beam shield element is provided within the bulb so as to provide a shield from the laser beam that passes through the plasma generated in the bulb.

Provided is a cleaning robot with a cleaning base. A cleaning part used for mopping and cleaning the ground is arranged on the cleaning robot, and the cleaning part is arranged to be of a movable structure. The cleaning robot is provided with a driving wheel, and the driving wheel is arranged to be of a rotatable installation structure. The cleaning robot further comprises a cleaning base, and a water outlet is formed in the cleaning base and communicated with a cleaning area. A separating mechanism is further arranged on the cleaning base, the separating mechanism is located on one side of the driving wheel, and power for driving the cleaning robot to walk and move is transmitted to the separating mechanism through rotation of the driving wheel to achieve the opening and closing effect ofthe water outlet. According to the scheme, the problems of inconvenience in use, poor experience effect and difficulty in cleaning the cleaning part due to the fact that the cleaning part of the existing sweeping robot needs to be manually detached by a user for cleaning are solved, and the problems that a base station of an existing sweeping robot is high in construction cost and large in occupied indoor space, and collected sewage is prone to smelling and pollutes the environment are solved.

The invention provides a broken wire repair method for an array substrate. The method includes the steps that the two ends of a first long wire region are acquired, wherein the first long wire region comprises a metal wire broken wire part; the two ends of the first long wire region are subjected to laser light irradiation, a color resistance layer and a second insulating layer are removed, a second metal layer is exposed, two first grooves are obtained, and the side walls of the first grooves are in step shapes; first metal films grow in the two first grooves and on the color resistance layer between the two first grooves, second metal layers at the bottoms of the two first grooves are connected through the first metal films, and connection of the metal wire broken wire part is completed. Due to the fact that the side walls of the first grooves obtained through the method are in the step shapes, in other words, the descending process of the side walls of the first grooves formed in the color resistance layer and the second insulating layer is slow, the climbing height of the first metal films is greatly reduced, the first metal films are not prone to breakage, and the success rate of broken wire repair is increased.

The invention discloses a membrane stripping mechanism capable of achieving product attaching and membrane stripping in sequence. The membrane stripping mechanism comprises a vertical plate, a membrane stripping motor, a membrane unwinding wheel, a membrane material transition wheel, a fixing wheel, an upper-layer membrane collecting assembly, a membrane pressing air cylinder assembly, a membranematerial detection sensor, an upper-layer membrane stripping knife, a lower-layer membrane stripping knife and a lower-layer membrane collecting assembly; the membrane unwinding wheel is installed onthe top of the vertical plate; the membrane material transition wheel is installed under the membrane unwinding wheel and used for adjusting the position of a membrane material; the fixing wheel is installed under the membrane material transition wheel and used for fixing the membrane material; the upper-layer membrane collecting assembly is installed under the membrane unwinding wheel, located onthe right side of the membrane material transition wheel and used for collecting an upper-layer membrane of the membrane material; and the upper-layer membrane stripping knife is installed on the right side of the fixing wheel and used for stripping the upper-layer membrane of the membrane material. The membrane stripping mechanism capable of achieving attaching and membrane stripping in sequenceis designed for a low-strength membrane material with two layers of protection membranes, especially the membrane material with the frame-shaped or annular appearance.

The reaction furnace tube cleaning procedure with automatically determined terminal suitable for low pressure chemical vapor deposition apparatus includes the following steps: leading cleaning gas into the reaction furnace tube to produce chemical reaction at specific temperature; continuously measuring the temperatures in several locations inside the reaction furnace tube; monitoring one of the temperatures until the temperature change converges to within some deflection value; monitoring all the temperatures until the temperature changes converge to within some deflection values; and over etching for one time period before stopping the reaction furnace tube cleaning procedure.

The invention relates to a manufacturing method of a starting sheet for nickel electrolysis, in particular to a manufacturing method of a starting sheet for nickel electrolysis extraction or electrolytic refining. The method comprises the following steps of: (1) rolling: laminating at least two layers of foam nickel together and manufacturing a bright and hole-free metal nickel composite sheet by rolling; (2) cutting: cutting the composite sheet into blocks according to a designed size or shape; (3) arranging a lug: arranging the lug by welding or riveting to obtain the nickel starting sheet. By adopting the method, the technical bottleneck of the conventional nickel starting sheet machining process is broken through; the method has a short manufacturing flow and high efficiency and is suitable for continuous production; the manufactured starting sheet has uniform thickness, stable size and flat profile; and the lug is arranged by welding or riveting, so that size positioning is accurate and the operation efficiency is high.

A cleaning robot with a cleaning base comprises a cleaning robot, the cleaning robot is provided with a cleaning piece used for mopping and cleaning the ground, and the cleaning piece is arranged to be of a movable structure. The cleaning robot further comprises a cleaning base, and the cleaning robot can be located on the cleaning base to clean the cleaning piece. When the cleaning piece moves, dirt on the cleaning piece is separated into water. A cleaning area and a sewage area are arranged, and a separation mechanism is arranged between the cleaning area and the sewage area and used for discharging water in the cleaning area into the sewage area. According to the scheme, the problems of inconvenience in use and poor experience effect due to the fact that a cleaning part of an existing floor sweeping robot needs to be manually detached by a user for cleaning are solved, meanwhile, the problem that the cleaning part of the existing floor sweeping robot is difficult to clean is solved,and the problems that an existing base station of the sweeping robot is high in construction cost and large in occupied indoor space, and collected sewage is prone to smelling and pollutes the environment are solved.

The invention discloses a backup cooling system for a data center, and a control method thereof. The cooling system comprises a gasifier and a venturi mixer, a cooling device is connected with a liquid nitrogen pipeline, the liquid nitrogen pipeline comprises a first pipeline and a second pipeline, the first pipeline inputs liquid nitrogen into the gasifier, the gasifier gasifies the liquid nitrogen into gaseous nitrogen and outputs the gaseous nitrogen to the venturi mixer through a conveying pipeline, the second pipeline inputs liquid nitrogen into the venturi mixer to be mixed with gaseous nitrogen to form cooling gas, and the cooling gas is output into a room through the output pipeline of the venturi mixer. According to the invention, the cooling reliability is improved, so that the equipment safety of the whole data center is guaranteed.

The invention belongs to the technical field of processes for conducting grinding or polishing on workpieces and specifically discloses a bearing polishing process. A polishing device is involved in the process and comprises an inner circle polishing part, an abradant circulating part and an outer circle polishing part, the outer circle polishing part is internally provided with a waste material separation mechanism, and the abradant circulating part is arranged on the outer circle polishing part. Through adoption of the structure above, the inner circle and outer circle of a bearing ring arepolished as materials are ground, and the problem that polishing of inner circles and outer circles of bearings in the prior art requires different grinding machines is correspondingly solved.

The invention is applicable to the technical field of power cable recovery, and provides an automatic power cable stripping and recycling device which comprises a shell, a driving mechanism and a stripping mechanism, wherein the driving mechanism and the stripping mechanism are arranged in the shell, an opening mechanism is further arranged in the shell, the opening mechanism is used for opening apower cable so as to separate core wires in the power cable from an insulating sheath, the opening mechanism comprises a roller body, the two ends of the roller body are fixed in the shell through mounting bases, the roller body has taper, spiral grooves are formed in the surface of the roller body, a plurality of rollers are embedded in the positions, which correspond to the spiral grooves, of the roller body, the power cable is input from the small-diameter end of the roller body and output from the large-diameter end of the roller body. The device has the beneficial effects that the stretching and compression of the power cable in the radial direction and on-axis direction in the movement process of the power cable can be achieved through the opening mechanism, the separation of the core wires and the insulating sheath is promoted, then the core wires and the insulating sheath are enabled to enter the stripping mechanism, and the stripping can be achieved efficiently.

The invention discloses a direct series high-voltage pulse power source for insulation test. The high-voltage pulse power source is characterized in that power supply outputs of a plurality of electrically isolated AC / DC DC power sources are respectively connected with power supply input terminals of the corresponding single-phase full bridge inverters; or the AC / DC DC power supply outputs are connected in parallel with a plurality of inputs of electrically isolated DC / DC DC power sources, outputs of a plurality of DC / DC DC power sources are electrically isolated from each other, and the output of each DC / DC DC power source is connected with the power supply input terminal of the corresponding single-phase full bridge inverter. An output of an inverter control system is connected with the input of an inverter driver, and the inverter driver is provided with a plurality of sets of electrically isolated outputs which are connected with control terminals of the corresponding single-phase full bridge inverter respectively. The power supply output terminals of a plurality of single-phase full bridge inverters are sequentially connected in series. The pulse power source can generate high-voltage pulses with adjustable amplitude and frequency, and the pulse voltage rising edge is steep.

The invention discloses a thrust water hydraulic cylinder which adopts a super absorbent technology and a steel wire rope technology. The end face and / or outer circular static seal face are / is sealedby rubber / plastic O-shaped seal rings with steel wire rope skeletons, and at the same time, is subjected to clearance blocking by super absorbent O-shaped seal rings with steel wire rope frames; and lubrication guide parts adopt pure water lubrication guide combined ring / super absorbent combined devices. Cartridge or superimposed V-shaped sealing devices separately for reciprocating holes / holes / shafts are also provided for sealing and lubrication of pistons / plungers / piston rods; forced-seal wedge-shaped annular grooves are deformed by using high pressure or ultra-high pressure water and gaps between an inner hole with a screw groove bush and the outer circle of a plunger is reduced for forced seal; the plunger with a screw groove is lubricated by using pressure water; and a split sleeve with pins is used for guaranteeing sealing through cooling, pressure-stabilizing, speed regulation and purification, and various innovative technologies are adopted. Sealing and lubrication and other problems are solved; and the thrust water hydraulic cylinder is applied to water hydraulic industries including high pressure and super high pressure systems.

The invention discloses a cultivating frame which is convenient to move for shiitake mushroom planting. The cultivating frame comprises a base and through grooves; the bottom of the base is provided with moving rollers; rotary grips are arranged above the base; the upper part of a top plate is provided with fixed pulleys; movable chains are connected with the middle parts of the fixed pulleys; thetop end of each movable chain is provided with a coiling block; the center of each coiling block is provided with a coiling column; the outside of the center of each coiling column is connected witha handle; the upper part of each movable roller is connected with a threaded sleeve through a fixing connecting sleeve; the center thread of each threaded sleeve is connected with a screw rod; and thethrough grooves are separately arranged in the upper parts of a middle plate and the top plate. The middle plate of the cultivating frame which is convenient to move for shiitake mushroom planting moves up and down under the action of the movable chains, so that staffs can move the middle plate up and down while picking relatively large mushrooms in the inner part, the shiitake mushrooms can be picked conveniently, and the problem that the shiitake mushrooms are damaged does not occur at the same time.

The invention relates to the technical field of unmanned aerial vehicles, and discloses a novel unmanned aerial vehicle. The novel unmanned aerial vehicle comprises a fuselage, bladeless fans, mounting blocks, supporting rods, connecting blocks, electric push rods, rotating shafts, sliding blocks, sliding grooves, stabilization rods, buffer springs, stabilization plates and antiskid blocks. The bladeless fans are fixedly mounted on the outer wall of the fuselage. The mounting blocks are fixedly mounted at the bottom of the fuselage. The supporting rods are movably connected to the bottoms of the mounting blocks. The connecting blocks are fixedly mounted at the tops of the supporting rods. The electric push rods movably connected with the connecting blocks are fixedly mounted at the bottomsof the mounting blocks. According to the novel unmanned aerial vehicle, propellers of a traditional four-rotor unmanned aerial vehicle are changed into the bladeless fans, and therefore the stabilityof the unmanned aerial vehicle during flying is guaranteed better; even though the unmanned aerial vehicle collides with an object, the problem of traditional propeller damage cannot be generated; and the maintenance cost is reduced, normal use of the unmanned aerial vehicle is guaranteed better, and the stability of the unmanned aerial vehicle during flying is improved.

The invention discloses an indoor machine of an air conditioner, which comprises a chassis, a shell, a suction grille, an indoor heat exchanger, a filter, a condense water disc, a fan motor, an indoor fan and an air guide plate. The indoor machine of the air conditioner also comprises a fixing device which fixes the indoor fan inside the chassis before the indoor machine goes out of a factory. The indoor machine of the air conditioner utilizes a fixed plug arranged at one end of the indoor fan and a plurality of fixed rings positioned on the outer circumference to firmly fix the indoor fan inside the shell before the indoor machine goes out of the factory. The fixed rings and the fixed plug are made from EPE materials with good buffer performance, thus the indoor fan cannot move in the shell even if the indoor machine is subject to external impact in the transport process, the undergone impact force can be absorbed by the fixed rings and the fixed plug, and no damage problem caused by mutual collision of the indoor fan and the indoor heat exchanger is generated, thereby improving the quality of the product.

The invention relates to a circuit structure of a three-phase air-conditioning system, in particular to a surge absorption circuit for the three-phase air-conditioning system, and aims to solve the technical problem of how to improve the surge absorption circuit of the three-phase air-conditioning system so as to effectively improve the performance of resisting kilovolt surge high voltage for multiple times. In order to achieve the purpose, the surge protection circuit comprises a first phase line, a second phase line, a third phase line, a zero line and a first surge absorption unit, wherein the first surge absorption unit comprises a loop formed by a first piezoresistor and a first discharge tube which are sequentially connected between the first phase line and the zero line in series. According to the surge absorption circuit, the structure that the piezoresistor and the discharge tube are additionally arranged between the phase lines and the zero line is adopted, the voltage absorption and endurance capacity of the surge absorption circuit is improved, and then normal use of the three-phase air conditioning system is guaranteed.

The invention belongs to the technical field of agricultural machinery, and relates to a potato planting machine, wherein the frame is provided with a seed storage box, the side wall of the seed storage box is vertically provided with a seed discharge pipe, the seed discharge port of the seed discharge pipe is positioned below the frame, the seed discharge pipe is vertically provided with a lifting device, the lifting device comprises a transmission chain wheel and a lifting chain with a material hopper, the lifting chain extends into seed storage box, the frame is provided with a fertilizer box, the fertilizer box is connected with the seed discharge pipe through a material discharge device, and a ditch generating device is arranged below the frame and is positioned in front of the seed discharge port of the seed discharge pipe. According to the present invention, the lifting device and the seed discharge pipe are matched to complete the seed conveying and the sowing operation, such that the sowing accuracy is ensured, and the damage on the seed can not occur; and with the material discharge device, the fertilizer application or drug discharge and the sowing operation are simultaneously performed and the fertilize application or drug discharge is uniform, such that the potato crop growth is substantially promoted, the working efficiency is improved, and the labor cost is reduced.

The invention discloses a mounting lock catch used for a plastic floor, comprising a male tenon arranged at one side of the floor and a female tenon, wherein the male tenon is composed of a convex part end face provided with a convex part; the female tenon is composed of a concave part end face provided with a concave part; the side wall of the female tenon, which is far from a tenon head, is provided with a projecting part; the front end of the tenon head of the male tenon is provided with a groove which is the same with the projecting part in the shape; the maximum width of the front section of the projecting part is less than or equal to the inlet width of the front section of the groove; the projecting part is arranged at a second chamfer on the side wall of the female tenon; and the horizontal central axis of the groove and the projecting part is the same in height with the height between surface layers of the floor. The mounting lock catch disclosed by the invention has the beneficial effects that (1) the projecting part arranged on the side wall of the female tenon is matched with the groove which is arranged on the side wall of the male tenon and is the same in shape with the projecting part, and the floor can be quickly mounted in a vertical plane while the floor is ensured not to displace in the vertical direction; and (2) the problem that the floor is damaged due to an assembled structure part in a mounting process can be avoided.

The invention relates to a construction carrying robot based on a Stewart parallel mechanism. The construction carrying robot comprises a carrying platform, six-freedom-degree parallel vibration tables, walking devices and tracks. The six-freedom-degree parallel vibration tables are located at the four top corner positions of the carrying platform correspondingly. The walking devices are located under the six-freedom-degree parallel vibration tables. The upper ends of the walking devices are connected with the lower ends of the six-freedom-degree parallel vibration tables. The lower ends of the walking devices are arranged on the tracks. According to the construction carrying robot, a six-SPS Stewart parallel mechanism is applied to the six-freedom-degree parallel vibration tables, the characteristics of high moving flexibility, good damping performance and high bearing capability of the six-SPS Stewart parallel mechanism are fully utilized, and therefore even when the construction carrying robot walks on the construction site field with the uneven road surface and the poor road surface condition, the problem of construction material slipping or damage of materials under the strong vibration situation cannot be caused, and the construction materials are protected in the carrying process.

The invention discloses a reinforcing steel bar bending machine applied to engineering construction. Through simultaneous bending of an axial push bending mechanism and a radial bending mechanism, themachine disclosed by the invention can bend a reinforcing steel bar in a relatively gentle manner, and the problem in damage of an internal structure of the reinforcing steel bar caused by impact bending does not take place. Meanwhile, during initial bending of the reinforcing steel bar with the machine disclosed by the invention, a controller controls the radial bending mechanism to bend at maximum bending force; and with running of a bending action of the reinforcing steel bar, bending force of the axial push bending mechanism gradually increases and bending force of the radial bending mechanism gradually decreases, so the reinforcing steel bar can be bent in an optimal, effort-saving and gentle manner, and bad influences on bent parts of the reinforcing steel bar can be reduced. The machine disclosed by the invention has the beneficial effects that a movable fixation disk is disposed and in joggled joint with an upper push bending disk and a lower push bending disk, so the to-be-bent reinforcing steel bar can be easily fixed and can also be taken out easily after bending, and bending efficiency is high; and a plurality of reinforcing steel bars can be bent at the same time, andthe bending efficiency is high.

The invention relates to a super capacitor and a manufacturing technique of the super capacitor. The super capacitor comprises an anode amphenol connector, a cathode amphenol connector, a capacitor module and a shell, wherein the capacitor module is arranged in the shell; the anode amphenol connector and the cathode amphenol connector are fixedly arranged on one end of the shell and connected with the capacitor module inside the shell; the shell is designed in a spilt mode, and an upper shell body, a lower shell body, a front cover plate and a rear cover plate are connected in a close fit manner to form an inner cavity; the capacitor module is adaptively arranged in the inner cavity; the anode amphenol connector and the cathode amphenol connector are adaptively arranged on the front cover plate and penetrate through the front cover plate and connect with the capacitor module; and a poly carbonate (PC) paper is arranged on the outer surface of the capacitor. With the adoption of the structure, the spilt design of the shell of the super capacitor enables production efficiency of products to substantially improve and rejection rates to substantially lower. The super capacitor has the advantages of being high in practicability, novel, simple and rational in whole structure, reliable in connection among components, and stable in working performance.

The invention discloses a novel stop valve, belongs to the field of stop valves for thermal generator sets, and solves the problems that existing stop valves for thermal power and nuclear power units are inconvenient to disassemble and assemble and high in cost. The novel stop valve comprises a valve body, a valve seat, a valve clack, a support, a valve rod and a valve rod nut, wherein the valve seat is arranged in the valve body; the valve clack is mounted in an inner cavity of the valve body; the valve clack is connected with the valve rod and arranged on the valve seat; the valve body is connected with the support; a first arc-shaped boss is arranged on the side wall of the upper portion of the valve body; a first positioning table is arranged on the side wall of the valve body; the first positioning table is located below the first arc-shaped boss; an arc-shaped clamping sleeve matched with the first arc-shaped boss is arranged on the inner wall of the lower portion of the support; the first arc-shaped boss is mounted in the arc-shaped clamping sleeve; a second positioning table is mounted on the bottom end face of the support; and the first positioning table and the second positioning table are overlapped one after the other and fixed through a first screw. The novel stop valve is convenient to disassemble and assemble, the service life of the stop valve is effectively prolonged, and the interchangeability of an electric stop valve and a manual stop valve is improved.

The invention discloses a short-circuit protection device to ground and an inverter system, comprising an isolation operational amplifier, a sampling module, a controller and a power module; The output end of the sampling module is connected with the input end of the isolation operational amplifier, the output end of the isolation operational amplifier is connected with the controller, and the isolation operational amplifier is connected with the power supply module. The sampling module is used for collecting the voltage of the inverter circuit and obtaining the sampling voltage; An isolationoperational amplifier is used for amplifying the sampling voltage to obtain an operational amplifier voltage; The controller is used to control the inverter circuit to open when the operational amplifier voltage is greater than a preset threshold value. When the inverter circuit is monitored, the voltage of the inverter circuit is collected in real time to obtain a sampled voltage, and the sampledvoltage is amplified and output to a controller. When the controller determines that a short circuit to ground occurs, the inverter circuit is controlled to be disconnected to protect the inverter. Due to the fast response of the controller, the protection action can be completed within 3us, which can effectively protect the inverter and reduce the fire risk.