36results about How to "To achieve a balanced effect" patented technology

The invention discloses a dynamic load balancing method for a distributed file system under a cloud environment. The method mainly comprises the steps of acquiring information of all nodes of the distributed file system under the cloud environment, judging whether the file system is balanced, computing a threshold needed when the system is balanced according to a disk space utilization rate, a CPUutilization rate, a memory utilization rate, a disk I / O occupancy rate and a network bandwidth occupancy rate of each node, and performing unbalance adjustment on the load of the file system according to the threshold and the disk space utilization rate. The method provided by the invention balances the load of the file system while supporting the execution of a cloud computation task, and continuously adjusts the load via monitoring information of the nodes, and thus the execution efficiency of cloud computation to the file system is improved.

The present invention provides a method for avoiding frequent interruption to occupy excess CPU resources in a real-time operation system, the method includes: a threshold is provided for each type interruption respectively, the threshold is a maximum ratio of the interruption time generated by the CPU allowance the type interruption to the whole interruption time; when the interrupt of the type is coming, CPU judges the ratio of the interruption time generated by the type interruption to the whole interruption time achieving the threshold set corresponding to the type interruption or not, if yes, shielding the type interruption; if not, continuous executing the interruption process. The invention leaves from the whole global of occupying condition of CPU resource, planning the CPU occupation of the interruption, and actively processing interruption and inhibition, effectively inhibiting frequent interruption, avoiding the excess occupation of CPU resource, achieving the effect of balancing utilization of system CPU resource.

The embodiment of the invention provides a wireless resource equalization method, device and apparatus and a medium, and the method comprises the steps: collecting measurement report data of a servicecell in each wireless measurement period, and determining a load index of the service cell in the wireless measurement period; determining a load value of the service cell in the statistical period;determining whether the serving cell is a high-load cell in the statistical period, and if yes, determining the business proportion of the serving cell needing to be balanced outwards; determining a first parameter configuration scheme; determining a second parameter configuration scheme; and selecting the scheme with the minimum parameter adjustment amplitude in the first parameter configurationscheme and the second parameter configuration scheme as an optimal scheme, and balancing the service of the service cell according to the optimal scheme. According to the scheme provided by the embodiment of the invention, reasonable parameter configuration can be realized, the expected equalization effect is achieved, the user satisfaction is improved, and the problems of complaints and the likeare reduced.

The invention discloses an optimal modulation method suitable for a three-phase four-wire system three-level converter. A multi-phase control midpoint potential balance algorithm is given based on a simplified 3D-SVPWM method under an a-b-c coordinate system, a compensation capacity factor reflects the compensation capacity of each phase on the midpoint potential offset, the potential offset is distributed to phases with the midpoint potential balance capacity according to the compensation capacity and the midpoint potential offset condition, multiple phases jointly participate in midpoint potential balance control, the time quantum needed for compensating for the offset is calculated through an offset mathematical model, then the time quantum acts on the output state of the three-level converter, and therefore the purpose of balancing the midpoint potential is achieved. The simplified optimal modulation method suitable for the three-phase four-wire system three-level converter can precisely control direct current side capacitor voltages.

The invention relates to a non-woven type lithium-ion battery separator single side coating device and a coating method thereof. The device comprises a non-woven type lithium-ion battery separator unwinding device, a micro-concave coating device, a back covering roller, a synchronous belt device I, a synchronous belt device II, a primary drying channel, a secondary drying channel, a final-stage drying channel, a non-woven type lithium-ion battery separator winding device, a phase conversion device and a cloth guide roller, when the coating is carried out, according to different transmissions of the non-woven type lithium-ion battery separator in the phase conversion device, and the functional requirements of the water-based coating liquid and the solvent-based coating liquid for the singleside coating on the non-woven type lithium-ion battery separator are achieved. The prepared non-woven type lithium-ion battery separator has the advantages that the flatness is high, the roughness issmall, and the coating is uniform, no leakage coating phenomenon exists on the coating of the separator, the problem that non-coating layer infiltration of the non-woven type separator is uneven is effectively solved, and the consistency of battery assembly performance is improved.

The invention relates to an MMC control method under unbalanced power grid voltage based on a Lyapunov function. The method comprises the following steps: (1) an MMC mathematical model is built; (2) according to the MMC mathematical model, the steady-state value of an MMC switching function is acquired; (3) based on the Lyapunov function, the fluctuation quantity of the MMC switching function is determined; and (4) according to the steady-state value of the MMC switching function and the fluctuation quantity of the MMC switching function, the control value of the MMC switching function is determined, and according to the control value of the switching function, the MMC is controlled to work. Compared with the prior art, the method has the advantages that the response speed is quick, the robustness is strong, the system has a simple structure, the physical meaning is clear, the cost is low, realization is easy and the like.

The invention discloses a horizontal grab bucket device with a grab track being a straight line. The horizontal grab bucket device comprises a fixed base, a movable base, a left grab bucket body, a right grab bucket body, a first connecting rod and a second connecting rod; the first connecting rod and the second connecting rod are hinged, the first connecting rod is hinged to the movable base, and the second connecting rod is hinged to the fixed base; hinge points include A, B and D; the upper portion of the left grab bucket body and the upper portion of the grab bucket body are both hinged to the movable base, and hinge points include B' and E; the bucket tip of the left grab bucket body is C; AD is parallel to B'C, and the sum of AD and DB is B'C; and the horizontal grab bucket device further comprises a power mechanism used for directly and indirectly driving the first connecting rod to rotate by a set angle, a driving mechanism capable of guaranteeing that during running, AD and B'C keep parallel all the time and a synchronizing mechanism enabling the right grab bucket body and the left grab bucket body to synchronously and reversely move. According to the principle, complicated simulation work is not needed in the design process, and the grab track can be the straight line through a pure mechanical structure.

One or more embodiments of the invention provide a neutral-point potential balance control method and device based on the current polarity. The method comprises the steps of collecting the three-phasecurrent polarity of an alternating-current side of a three-level inverter, and dividing a three-level vector space; obtaining a neutral point current value according to the position of the large sector; obtaining a voltage difference value of an upper capacitor and a lower capacitor of the direct-current side; obtaining the polarity of a balance factor according to the voltage difference value and the neutral point current value; adjusting the voltage difference value to obtain the size of a balance factor; obtaining a balance factor according to the polarity of the balance factor and the size of the balance factor; and introducing the balance factor into a seven-segment SVPWM algorithm, and adjusting the action time of positive and negative small vectors so as to carry out balance control on the neutral point potential of the three-level inverter. According to the invention, only three-phase current signals on the alternating-current side and upper and lower capacitor voltage signalson the direct-current side of the three-level inverter need to be collected, three-phase voltage does not need to be additionally collected, discussion does not need to be conducted on a small sectorto which reference voltage belongs, and thus the problem that neutral point potential balance control is complex is solved.

The invention discloses a lithium-ion battery pack balancing method and system. The lithium-ion battery pack balancing method is mainly used for converting single battery bodies into a serial-connected state when a battery pack needs to be charged or discharged, and converting the single battery bodies into a parallel-connected state when the battery pack needs to be balanced. The lithium-ion battery pack balancing system comprises the battery pack and a serial-to-parallel converting device, wherein both electrodes of each single battery body are respectively led out by lead wires; the serial-to-parallel converting device comprises wiring terminals, a connection mechanism and a converting mechanism; the lead wires of the both electrodes of each single battery body are respectively connected with the wiring terminals; and the converting mechanism controls the connection mechanism or the wiring terminals to move, so that connection relation between the wiring terminals can be converted, and the single battery bodies are connected in series or in parallel. With the adoption of the serial-to-parallel converting method provided by the invention, the advantages of simple structure, low cost, no energy consumption, manul control and low failure probability can be realized; and the problems that the other balancing methods have the defects of complex structure, high cost, instability of electronic control and low energy utilization rate can be solved.

The invention discloses an unmanned aerial vehicle self-balancing picking device based on a lever principle and a control method thereof. The device comprises an electric fruit picking device, a camera fixing support, a binocular vision camera assembly, a front rod body, a connecting mechanism, a ball screw sliding table, a rear rod body, a balance weight box, a shear mechanism, a weight sensor and a fruit branch clamping mechanism. During use, the device is fixed on an unmanned aerial vehicle, a target is searched for through images collected by a binocular vision camera, the position of the unmanned aerial vehicle is finely adjusted, and then the electric fruit picking device is controlled by a center controller to execute picking operation and work of the ball screw sliding table. After picking is completed, the weight sensor feeds back preliminary detection quality information of the fruits to an unmanned aerial vehicle processor, and then the ball screw sliding table adjusts the telescopic length based on a calculation result of the lever principle to basically balance the suddenly increased weight of the fruits due to sudden load change at the front end of the unmanned aerial vehicle during picking, so that the stability of the unmanned aerial vehicle is ensured. The device is suitable for being used in the fields of fruit harvesting and pruning in the forest and orchard.

The present invention belongs to the technical field of feeds for laying hens, particularly relates to a pure plant feed for the laying hens and a preparation method thereof, and solves a technical problem that in the prior art, the laying hens fed by the pure plant feed for the laying hens is relatively low in egg laying rate. The feed comprises the following components: 60-65 parts of corn, 16-20 parts of soybean meal, 2-5 parts of corn gluten meal, 5-10 parts of bran, 0.5-1.5 parts of soybean oil, 4-5 parts of stone granules, 5-6 parts of stone powder, 0.7-1 part of calcium hydrogen phosphate, 0.2-0.4 part of edible salt, 0.12-0.2 part of methionine, 0.1-0.18 part of lysine, 0.1-0.18 part of choline chloride and 0.5-0.8 part of multi-vitamin and multi-mineral. Compared with the prior art, the provided pure plant feed for the laying hens is used for feeding the laying hens, improves the egg laying rate of the laying hens, and reduces heavy metal pollution caused by animal protein feed raw materials due to no addition of the animal proteins.

The invention relates to the technical field of underwater vehicles, and discloses a dual-drive foldable coaxial propeller device which comprises a fairing, a first motor, a second motor, a front blade and a rear blade, the first motor, the second motor, the front blade and the rear blade are coaxially arranged in the fairing, the arrangement directions of the first motor and the second motor are opposite, an output shaft of the first motor is connected with the front blade, an output shaft of the second motor is connected with the rear paddle, the rotation direction of the front paddle is opposite to that of the rear paddle, and the arrangement direction of the front paddle is opposite to that of the rear paddle; the tail end of an output shaft of the second motor is connected with a rear propeller hub, the rear propeller blades are rotatably connected to the rear propeller hub, a rear propeller blade reset piece is arranged between the rear propeller hub and the rear propeller blades, and the two ends of the rear propeller blade reset piece are connected with the rear propeller hub and the rear propeller blades respectively. The dual-drive foldable coaxial propeller device has the advantages that the structure is simple, the operation is stable, the control is easy, the propulsive force of the aircraft can be greatly improved during acceleration propulsion, the navigation resistance can be reduced during low-speed cruise, and the navigation efficiency is improved.

The invention belongs to the technical field of single-phase asynchronous motors, and particularly relates to a low-rotating speed and high-torque motor suitable for a noodle press. The low-rotating speed and high-torque motor comprises a motor shell, wherein a stator is arranged on the inner wall of the motor shell; a rotor is arranged at the center position of the stator; a front end cover is arranged at the front end of the motor shell; a rear end cover is arranged at the rear end of the motor shell; bearing installation positions are arranged at the middle parts of the front end cover and the rear end cover respectively; a bearing is arranged in each bearing installation position; and two ends of a shaft of the rotor are arranged in the corresponding bearings in a penetrating manner respectively. The low-rotating speed and high-torque motor is relatively low in rotating speed, relatively high in torque, and suitable for equipment of the noodle press and the like; and the rotor of the motor can be finely adjusted automatically by a dynamic balancing device, so that the balance effect is achieved; and the vibration of the motor and the noise of the overall motor are reduced.

The invention discloses a main driving structure of a transverse cutting machine, which comprises a main motor, wherein the main motor is arranged on a stand, the output end of the main motor is connected with the driving shaft of the transverse cutting machine, an energy storing flywheel is arranged at one end of the driving shaft through a bearing, an energy storing device is connected with the output end of the main motor through a synchronizing wheel, and a clutch is also arranged at the outer side of the energy storing device. A variable-frequency motor is adopted in the main driving structure of the transverse cutting machine, the energy storing flywheel and the clutch are arranged at one end of the driving shaft, the inertia of the driving shaft is increased through the flywheel to achieve the balancing effect, and the clutch is beneficial to overcoming the defects that large current does not need to be started with a load and the like, simultaneously has a braking function, lays a foundation for synchronizing secondary starting with other production lines and does not need toolsetting.

The invention discloses an unmanned aerial vehicle self-balancing picking device based on the principle of leverage and a control method thereof. Platform, rear pole main body, counterweight box, scissors mechanism, weight sensor and fruit branch clamping mechanism; when in use, first fix the device on the drone, search for the target through the image collected by the binocular vision camera and fine-tune the position of the drone , and then through the central control to control the electric fruit picking device to perform the picking operation and the work of the ball screw sliding table. The calculation results are used to adjust the telescopic length to basically balance the sudden increase in the weight of the sudden increase in the front-end load mutation fruit picked by the UAV, so as to ensure the stability of the UAV. The invention is suitable for use in the fields of fruit harvesting and pruning in forest orchards.

The invention discloses a horizontal grab bucket device with a grab track being a straight line. The horizontal grab bucket device comprises a fixed base, a movable base, a left grab bucket body, a right grab bucket body, a first connecting rod and a second connecting rod; the first connecting rod and the second connecting rod are hinged, the first connecting rod is hinged to the movable base, and the second connecting rod is hinged to the fixed base; hinge points include A, B and D; the upper portion of the left grab bucket body and the upper portion of the grab bucket body are both hinged to the movable base, and hinge points include B' and E; the bucket tip of the left grab bucket body is C; AD is parallel to B'C, and the sum of AD and DB is B'C; and the horizontal grab bucket device further comprises a power mechanism used for directly and indirectly driving the first connecting rod to rotate by a set angle, a driving mechanism capable of guaranteeing that during running, AD and B'C keep parallel all the time and a synchronizing mechanism enabling the right grab bucket body and the left grab bucket body to synchronously and reversely move. According to the principle, complicated simulation work is not needed in the design process, and the grab track can be the straight line through a pure mechanical structure.

The invention provides a method, a system and a device for load balancing. The method comprises steps: when a destination storage device receives a connection request from a source storage device forwarded by a network device through a first network interface, whether data borne by the first network interface and data borne by other network interfaces achieve load balancing is judged; if not, the destination storage device refuses to build connection with the source storage device, a notification message is sent to the source storage device through the network device, the source storage device modifies HASH parameters in the connection request, and the modified connection request is sent again to the destination storage device through the network device; and if yes, the destination storage device builds connection with the source storage device through the first network interface, and data from the source storage device and forwarded by the network device are received through the first network interface. Through the technical scheme of the invention, the problem of the unbalanced HASH processing result can be avoided, data packet loss is reduced, traffic overload of a certain network interface is avoided, and waste of network interface resources is avoided.

The invention discloses a self-walking type self-balance agricultural sprayer which comprises a sprayer body. A balance mechanism is detachably connected right with the lower side of the sprayer body.A self-walking type device is connected right with the lower side of the balance mechanism. A machine body shell serves as a main body of the sprayer body. The upper side of the machine body shell isdetachably connected with a spraying pipe. The spraying pipe is connected with a water storage tank through a water conveying pipe. The upper right corner of the machine body shell is detachably connected with a handle. A control button is embedded in the handle. By arranging the balance mechanism under the sprayer body, the aim of damping the sprayer body is realized through a damping spring inthe walking process of the sprayer body; then, the aim of buffering the sprayer body during bumping is realized through an air bag damping cushion of an air bag balance device at the bottom of a supporting plate, and the balance effect is realized by the sprayer body on the upper side.

The invention discloses an intelligent numerical control manipulator equipment capable of conveniently collecting waste materials. The intelligent numerical control manipulator equipment capable of conveniently collecting the waste materials comprises a bottom plate and a machine box shell, wherein a balancing weight is arranged in the bottom plate, a rubber gasket is arranged on the outer side of the bottom plate, a fixing strip is installed in the rubber gasket, and moving rolling wheels are arranged below the fixing strip; a movable locking strip is arranged on one side of the movable rolling wheel, and a baffle strip is arranged on the other side of the movable rolling wheel. The intelligent numerical control manipulator equipment has the beneficial effects that the intelligent numerical control manipulator equipment capable of conveniently collecting the waste materials is provided with a threaded elastic joint, the installed threaded elastic joint and a mechanical clamping strip are arranged, a mechanical port has a large space, and equipment assemblies can be conveniently installed and replaced; due to the fact that the threaded elastic joint is provided with a threaded structure, a user can conveniently replace different types of mechanical clamping strips according to different material attributes of the waste materials, and the waste materials can be clamped by the equipment to be transported and transferred under the interaction of the threaded elastic joint and the mechanical clamping strip, so that the treatment function is achieved.

One or more embodiments of this specification provide a current polarity-based midpoint potential balance control method and device, including: collecting the three-phase current polarity on the AC side of the three-level inverter, and dividing the three-level vector space; According to the position of the large sector, obtain the midpoint current value; obtain the voltage difference between the upper and lower capacitors on the DC side; obtain the polarity of the balance factor according to the voltage difference and the midpoint current value; adjust the voltage difference to obtain the balance factor The size of the balance factor; according to the polarity of the balance factor and the size of the balance factor, the balance factor is obtained; the balance factor is introduced into the seven-segment SVPWM algorithm, and the action time of the positive and negative small vectors is adjusted to adjust the midpoint of the three-level inverter Potential for balance control. The present invention only needs to collect the three-phase current on the AC side of the three-level inverter and the upper and lower capacitor voltage signals on the DC side, without additionally collecting the three-phase voltage, and does not need to discuss the small sector to which the reference voltage belongs to solve the midpoint potential balance Control more complex problems.

The invention discloses a balancing lifting beam of a hoisting sling. The balancing lifting beam comprises balancing vertical beams, wherein balancing cross beams are fixedly arranged on the side surfaces of the balancing vertical beams, lifting hooks are welded at the bottom ends of the balancing cross beams, welding plates are fixedly arranged at the top ends of the lifting hooks, hook grooves penetrate through the bottom ends of the welding plates, supporting plates are fixedly arranged at the top ends of the balancing cross beams, a lifting plate is fixedly arranged at the top ends of thesupporting plates, a balancing groove is fixedly arranged at the bottom end of the lifting plate, a lifting ring is fixedly arranged at the top end of the lifting plate, a lifting hole penetrates through the front face of the lifting ring, and a force-gathering block is fixedly arranged at the top end of the lifting ring. The device enables the lifting plate, the balancing vertical beams and the balancing cross beams to be always in a parallel state through the balancing vertical beams, the balancing cross beams, the support plates, the force-gathering block and the lifting hook so as to achieve the purpose of improving the overall balance of the lifting beam. The purpose of balancing and fixing a box body with the center of gravity not in the middle is achieved as the box body does not incline or turn over due to the crossed type binding of the box body.

The present invention relates to a kind of MMC control method under the unbalanced grid voltage based on Lyapunov function, and the method comprises the following steps: (1) establishing MMC mathematical model; (2) obtaining MMC switching function steady-state value according to MMC mathematical model; 3) Determine the fluctuation of the MMC switching function based on the Lyapunov function; (4) Determine the control value of the MMC switching function according to the steady state value of the MMC switching function and the fluctuation of the MMC switching function, and control the work of the MMC according to the switching function control value. Compared with the prior art, the invention has the advantages of fast response speed, strong robustness, simple system structure, clear physical meaning, low cost, easy realization and the like.

The invention relates to the technical field of pumping units, and discloses an energy-saving pumping unit, comprising a crank rod, one end of the crank rod is fixed with a terminal, and the side wall of the crank rod away from the terminal is fixed with a connecting rod connecting shaft , the crank rod is located at one end of the driving groove and a moving groove is excavated inside, and a counterweight is inserted in the moving groove, and the side walls of both sides of the balancing weight inside the moving groove are fixed with limit tubes, and the Both ends of the crank rod located in the moving groove are cut with limiting grooves, and the top and bottom ends of the crank rod located outside the limiting groove are cut with disassembly grooves. When the crank rod drives the counterweight in the moving groove to rotate, the The weight can be alternately adapted and buffered by the compression of the buffer springs at both ends, so that the rise or fall of the counterweight when rotating can be buffered by the buffer spring to achieve a balanced effect, so that the donkey head is doing It can guarantee a certain speed when nodding.

The invention provides a shoe sole with an anti-torsion balance structure, the shoe sole comprises a midsole and an outsole attached to the midsole, and an anti-torsion balance sheet is arranged between the midsole and the outsole; the anti-torsion balance piece is of an X-shaped structure, and the middle of the anti-torsion balance piece is of a spiral structure. The midsole is provided with a cavity, the spiral structure of the anti-torsion balance piece is located in the cavity, and the rest part of the anti-torsion balance piece is fixed between the midsole and the outsole. Compared with the prior art, according to the sole with the anti-torsion balance structure provided by the invention, the anti-torsion balance sheet is arranged between the midsole and the outsole; the good overallinteraction is achieved, the shoe sole waist can be supported in the longitudinal direction, good turning performance and a natural recovery function are achieved when the shoe sole is turned outwards, meanwhile, a lock catch function is achieved when the shoe sole is turned inwards, the ankle sprain is prevented, and the balance effect during exercise is achieved.

Provided is a floating type three-point suspension device. A horizontal sensor (14) is installed on the upper portion of a gearbox and connected with a hydraulic control valve (7). A left guide groove (8) and a right guide groove (4) are both of a hollow structure, the upper end of the left guide groove and the upper end of the right guide groove are connected to the left end and the right end of a suspension beam respectively, and the lower end of the left guide groove and the lower end of the right guide groove are connected to the upper portion of a rack. A left hydraulic oil cylinder (11) and a right hydraulic oil cylinder (3) are arranged in the left guide groove and the right guide groove respectively, the fixed end of the left hydraulic oil cylinder and the fixed end of the right hydraulic oil cylinder are connected with the left end and the right end of the suspension beam respectively, and the telescopic end of the left hydraulic oil cylinder and the telescopic end of the right hydraulic oil cylinder are connected with a left movable sliding block (9) and a right movable sliding block (5) respectively. A left suspension plate (10) and a right suspension plate (6) are connected to the left movable sliding block and the right movable sliding block respectively. The floating type three-point suspension device is simple in structure, mechanical-electric-hydraulic integration is achieved, influences caused by an uneven earth surface on working of an agricultural machine can be better avoided, the working effect of the agricultural machine can be improved, and meanwhile the service life of the agricultural machine can be prolonged.

The invention relates to the technical field of filter presses, and discloses a filter press working pressure and sealing pressure balancing device which comprises a supporting mechanism and a balancing mechanism, the balancing mechanism is movably connected to the center of the interior of the supporting mechanism, and the supporting mechanism is arranged on the outer surface of the balancing mechanism. Balance assemblies are fixedly connected to the two ends of the outer side of the balancing mechanism, compression boxes are arranged at the two ends in the balance assemblies, connecting plates are arranged at the tops of the compression boxes, compression assemblies are movably installed at the tops of the connecting plates, connecting blocks are fixedly connected to the tops of the balance assemblies, and top plates are arranged at the tops of the connecting blocks. The two balance assemblies are symmetrically distributed at the two ends of the outer surface of the balancing mechanism, the compression assemblies arranged in the balance assemblies communicate with inner grooves, pressure generated in the inner grooves can be effectively compressed and extruded through the arranged balance assemblies, and it is guaranteed that the pressure in the inner grooves is normal; and the balancing effect is effectively achieved.

The present invention provides a method for avoiding frequent interruption to occupy excess CPU resources in a real-time operation system, the method includes: a threshold is provided for each type interruption respectively, the threshold is a maximum ratio of the interruption time generated by the CPU allowance the type interruption to the whole interruption time; when the interrupt of the type is coming, CPU judges the ratio of the interruption time generated by the type interruption to the whole interruption time achieving the threshold set corresponding to the type interruption or not, ifyes, shielding the type interruption; if not, continuous executing the interruption process. The invention leaves from the whole global of occupying condition of CPU resource, planning the CPU occupation of the interruption, and actively processing interruption and inhibition, effectively inhibiting frequent interruption, avoiding the excess occupation of CPU resource, achieving the effect of balancing utilization of system CPU resource.

The invention discloses a planar power semiconductor device. A device unit comprises a first epitaxial layer formed on a substrate; the gate structure is formed on the surface of the first epitaxial layer; the source region and the first side surface of the gate structure are self-aligned; a gap is formed between the drain region and the second side surface of the gate structure; the drift region is located between the second side surface of the gate structure and the drain region; the conductive channel is composed of an inversion layer formed during inversion of the surface of the first epitaxial layer covered by the gate structure; the doping concentration distribution of the drift region forms a charge balance structure, and during reverse biasing, the charge balance structure enables the drift region to be completely exhausted and the surface electric field to be uniformly distributed. The charge balance structure of the drift region can be realized, so that the specific on-resistance can be reduced, the energy loss of the device when the device is turned on is greatly reduced, the method is particularly suitable for a gallium nitride power device, the advantages of a gallium nitride material can be fully played, the manufacturing cost of the gallium nitride device is reduced, and the technological process is simplified.