7063results about How to "Effective protection" patented technology

An intravascular ultrasound (IVUS) device includes a flexible, slender member having a proximal portion and a distal portion; a controller connected to the distal portion of the flexible, slender member; an ultrasound transducer disposed at the distal portion of the flexible, slender member and communicating with the controller; a pressure transducer disposed at the distal portion of the flexible, slender member and communicating with the controller; and a plurality of conductors extending from the controller to the proximal portion of the catheter, at least one of the plurality of conductors being configured to carry a signal representing information captured by the ultrasound transducer and information captured by the pressure transducer.

The invention discloses a privacy protection recommendation method in combination with federated learning and a knowledge graph. The method comprises the steps that 1, a server initializes and distributes a federated learning global model; the client uses a differential privacy edge camouflage algorithm to increase the confusion degree of the original data; step 2, the client loads original data to the federated learning local model for training to obtain a declined federated learning local model gradient; step 3, the client uses an induction order RDP privacy algorithm to carry out gradient noise addition on the descending federal learning local model and uploads the model to the server; 4, the server receives the federated learning local model gradient after noise adding, and updates and evaluates a federated learning global model; repeating the step 2 to the step 4 until the model converges or reaches a preset number of iterations, and obtaining an optimized federated learning global model; and 5, inputting user data into the optimized federal learning global model, outputting an interest probability value, and judging the potential preference of the user.

The invention discloses a special transformer state management method and system based on intelligent monitoring and remote diagnosis. The method comprises the steps that electrical parameters of a special transformer user are collected through monitoring equipment; the collected data parameters are analyzed in real time, and the operation state and the abnormal condition of the equipment are judged; monitoring data are transmitted through a communication network, and remote monitoring is achieved; and when an abnormality is detected, triggering an alarm mechanism, and providing fault diagnosis information. According to the invention, the safety and operation efficiency of the power system are improved. Key parameters such as voltage, current, power and frequency can be collected in real time, abnormal conditions such as overload and undervoltage can be rapidly detected through an intelligent algorithm, and an alarm is triggered in time. The system adopts AES encryption to guarantee data transmission security, supports 4G / 5G network to realize remote monitoring, and ensures that operation and maintenance personnel can quickly obtain fault diagnosis information and personalized processing suggestions. The fault response speed and the system stability are obviously improved, and the operation and maintenance cost is reduced.

The invention belongs to the technical field of biology, and provides a porcine epidemic diarrhea virus mRNA vaccine and application. The mRNA molecule comprises a coding region for coding the S protein of the PEDV; the PEDV is of a G2a type, and two proline mutations I1076P and L1077P are introduced into an S protein. The invention further discloses a DNA molecule. An S protein of PEDV; a recombinant plasmid; recombining the host cell; an mRNA vaccine formulation which can be used to prepare an antibody against the S protein of PEDV after immunizing an animal; the invention further discloses application of the mRNA molecule, the DNA molecule, the recombinant plasmid or the host cell to preparation of a medicine for preventing PEDV (Porcine Epidemic Diarrhea Virus) infection. The vaccine prepared by the invention is fast in antibody generation and high in protection rate, can generate high-level neutralizing antibodies in serum and breast milk of sows after the pregnant sows are immunized before parturition, has a remarkable protection effect on piglets, and can effectively prevent the piglets from being infected with PEDV (Porcine Epidemic Diarrhea Virus).

The invention provides a liquid cooling temperature control method of an energy storage cabinet and the energy storage cabinet. The method comprises the following steps: acquiring predicted operation power of the energy storage cabinet after a first duration, historical operation data and historical environment temperature data of the energy storage cabinet, and current operation data and current environment temperature of the energy storage cabinet; based on the predicted operation power of the energy storage cabinet after the first duration, the historical operation data and the historical environment temperature data of the energy storage cabinet, and the current operation data and the current environment temperature of the energy storage cabinet, predicting the battery cell temperature in the energy storage cabinet after the first duration, wherein the battery cell temperature in the energy storage cabinet after the first duration comprises the highest battery cell temperature and the lowest battery cell temperature; obtaining a first liquid cooling mode, wherein the first liquid cooling mode is the liquid cooling mode of the current energy storage cabinet; and determining a second liquid cooling mode based on the first liquid cooling mode, the highest temperature of the battery cell and / or the lowest temperature of the battery cell, wherein the second liquid cooling mode is a liquid cooling mode of the energy storage cabinet after the first duration. According to the method provided by the invention, the liquid cooling temperature of the energy storage cabinet can be actively controlled, and the energy consumption is reduced.

The invention relates to the technical field of flue gas, and provides a deacidification control method and device for a garbage incinerator, and the method comprises the steps: obtaining combustion parameter data, purification parameter data and gas detection data, inputting a preset prediction model, and outputting future emission data; inputting the future emission data into a preset parameter model, outputting future control parameters, and calculating future concentration parameters and future injection quantity parameters of the lime slurry; analyzing a future concentration parameter linear interval and a future injection quantity parameter linear interval; inputting the future concentration parameter and the injection quantity parameter into a preset temperature control model, and outputting a future temperature parameter linear interval; all the intervals are input into the semi-dry method deacidification tower, so that the future temperature and the future production concentration can be controlled by automatically adjusting a valve port of the semi-dry method deacidification tower, and the problem that when components and loads of garbage change, control parameters are difficult to adjust in time, and consequently flue gas emission exceeds the standard or lime slurry is wasted is solved.

The invention discloses a cutting device for ship side protection plate steel machining, and belongs to the technical field of ship side protection plate steel machining.The cutting device for ship side protection plate steel machining comprises a device body, and an anti-splashing plate is arranged; in order to improve the spark anti-splashing effect when the laser cutting head makes contact with the plate steel, an inserting block can be inserted into an inserting groove for clamping installation, a first servo motor is started to drive a connecting gear to rotate through rotation of a driving gear, the connecting gear rotates to drive a sliding column to slide along the inner wall of a chute, and meanwhile, the sliding column is driven to slide along the inner wall of the chute. And the driving motor is started to drive the sliding rod to do telescopic motion along the inner wall of the sliding groove, so that the anti-splashing plate does synchronous telescopic motion along the periphery of the laser cutting head, and the driving motor is started to drive the anti-splashing plate to perform angle adjustment according to the requirement of the protection angle, so that the effect of effectively protecting the protection plate steel during cutting machining is achieved.

The utility model relates to the technical field of new energy charging piles, and discloses a light storage and charging integrated new energy charging pile which comprises a charging pile body, a top plate is fixedly installed on the top of the charging pile body, a supporting rod is fixedly installed on the top of the top plate, and a cover plate is fixedly installed on the top of the supporting rod. According to the light storage and charging integrated new energy charging pile, the opening and retracting assembly is arranged, after the opening and retracting assembly is used, under mutual matched transmission of a gear, an inner gear ring and a rack, after a servo motor is started, a plurality of photovoltaic panels are driven to move towards the center of the bottom of a cover plate, and the photovoltaic panels can be blocked by the cover plate after moving; according to the charging pile, the photovoltaic panels are prevented from being damaged by severe weather such as accumulated snow and hail, the service life of the photovoltaic panels is prolonged, and in addition, the multiple photovoltaic panels can be driven to move towards the outer side of the cover plate, extend out of the cover plate, receive sunlight and convert solar energy into electric energy to be stored in the charging pile body.

The utility model discloses a robot which comprises a robot body and a cutting mechanism, the robot body comprises a vehicle body and moving assemblies, and the moving assemblies are arranged on the two sides of the vehicle body and used for driving the vehicle body to advance; the cutting mechanism comprises a connecting assembly and a cutting assembly, and the cutting assembly is connected to the vehicle body through the connecting assembly and can be switched between a first area and a second area relative to the vehicle body; the second area is closer to the vehicle body than the first area, and when the cutting assembly is located in the first area, the cutting assembly works; and when the cutting assembly is located in the second area, the cutting assembly stops working.

The invention discloses a dust collecting device for producing protective clothing and treating dust, and relates to the technical field of dust collecting devices, the dust collecting device comprises a pre-dust-collecting chamber shell and a second combined flow guiding piece, the upper end of the left side of the pre-dust-collecting chamber shell is connected with an air inlet pipeline, and the lower end of the right side of the pre-dust-collecting chamber shell is connected with an air outlet pipeline; the second combined flow guide part is arranged between the air inlet pipeline and the air outlet pipeline, and the second combined flow guide part is composed of a rectangular outer frame, four second flow guide plates, an angle and distance adjusting mechanism and the like; the dust collector has multiple advantages, the burden of the filter bag can be relieved through the dust pre-collection chamber shell, the first combined flow guide part can flexibly change the included angle between the first flow guide plate and the center axis of the air inlet pipeline by means of the first electric push cylinder according to the flow and concentration of dust-containing air, and the second combined flow guide part can flexibly change the included angle between the first flow guide plate and the center axis of the air inlet pipeline according to the size and concentration of dust particles. The inclination angles of the four second flow guide plates are synchronously adjusted through the angle adjusting mechanism, and the distance between the second flow guide plates is adjusted in a self-adaptive mode through the distance adjusting mechanism.

The utility model discloses a pressure controllable type machine tool clamp, belongs to the technical field of machine tool clamps, and aims to solve the problems that a workpiece cannot be clamped stably and cannot be protected. The pressure controllable type machine tool clamp comprises a concave frame, a disc is fixedly connected to the top of the concave frame, and a rotating shaft penetrating through the disc is rotationally connected to the upper surface of the bottom of the concave frame; the worm wheel is matched with the worm, the rotating wheel is rotated to enable the worm to rotate, and the worm wheel meshed with the worm drives the rotating shaft to rotate, so that the disc rotates, the disc rotates to drive the arc-shaped guide groove to push the guide wheel to move, and the guide wheel drives the sliding rod to move. The multiple sliding rods are driven to move towards the inner side, the multiple arc-shaped chucks are driven to clamp and fix a workpiece, the workpiece is clamped from four directions at the same time, the workpiece can be stably fixed, production errors caused by deviation of the workpiece in the machining process are avoided, and the production precision and stability are improved.

The invention provides an air-ground cooperative wetland air patrol method and device and electronic equipment, and the method comprises the steps: making a patrol flight plan based on an operation region and a flight limiting region defined by an operation control management center; daily first flight confirmation is carried out, the unmanned aerial vehicle is controlled to take off under the condition that the flight control right is obtained, and automatic patrol is carried out according to the patrol flight plan. In the automatic patrol process of the unmanned aerial vehicle, image video data are collected in real time, the operation condition is monitored, and the real-time equipment state and alarm information of the unmanned aerial vehicle are obtained. Analyzing according to the image video data to obtain an inspection result, and generating an alarm signal when an abnormal condition exists in the inspection result. And judging whether the unmanned aerial vehicle has a fault based on the real-time state of the equipment and the alarm information, and controlling the unmanned aerial vehicle according to a preset fault handling strategy when the unmanned aerial vehicle has the fault. According to the method, an air-ground cooperation technology and an intelligent technology are combined, the wetland inspection efficiency is effectively improved, and intelligent management of the wetland protection area is realized.

The invention discloses a device and a method for a low-speed wind tunnel gust or flutter half-mode test, belongs to the field of wind tunnel tests, and aims to solve the problems that an existing gust or flutter half-mode test device cannot realize complete release of heaving and pitching degrees of freedom and is difficult to share the two tests. The device comprises an overall frame, the overall frame is installed in a wind tunnel test section, two sliding rails are vertically arranged on the front end face of the overall frame, two sliding block sets are arranged on the left side and the right side of the rear end face of a tackle, the two sliding block sets are in sliding fit with the two sliding rails in a one-to-one correspondence mode, two spring seats are arranged at the top end of the overall frame, and horizontal shafts are arranged on the spring seats. The inner ring ends of the two clockwork springs are connected with the horizontal shafts of the two spring seats in a one-to-one correspondence manner, the outer ring ends of the two clockwork springs respectively droop to be connected with the pulley, and the model mounting seat is cylindrical and is in running fit with the pulley; the device can be used for a gust load retarding test and a body degree of freedom flutter test, and can be shared by the two tests.

The invention discloses a self-rescue device for new energy automobile battery thermal runaway, which comprises a battery monitoring unit, a mounting part and a battery module, a protection box is arranged on the outer side of the lower part of the battery module, the protection box is slidably arranged in a mounting groove formed in the bottom of an automobile, and a sealing mechanism, a support sensing plate and a power mechanism are arranged in the protection box; a self-rescue assembly is arranged in the sealing mechanism and comprises an air storage tank and an exhaust part. According to the self-rescue device for thermal runaway of the battery of the new energy automobile, after an abnormal battery module falls into the protection box, the sealing mechanism is unfolded to completely cover and wrap the battery module, the self-rescue assembly runs immediately, the gas storage tank sprays nitrogen to the battery module through the gas discharging opening in the telescopic gas discharging pipe, the battery module is protected in time, and the service life of the battery module is prolonged. According to the battery module provided by the invention, the situation that fire rapidly spreads is avoided under the condition that the battery module is isolated from the outside, so that normal and intact batteries are prevented from being influenced by abnormal batteries, the batteries which are not abnormal yet are effectively protected, and the practicability is better.

The embodiment of the invention provides a low-voltage electric energy quality problem monitoring terminal and a detection processing method, and belongs to the technical field of electric energy quality monitoring. The monitoring terminal comprises a central processor, a memory, a data acquisition module, a data preprocessing module, a feature extraction module, a problem identification module and an equipment positioning module. The data preprocessing module is used for preprocessing the collected data; the feature extraction module is used for extracting multi-dimensional features from the preprocessed data; the problem identification module is used for classifying and identifying the power quality problem by using a deep learning model and outputting an identification result; according to the monitoring terminal and the detection processing method, efficient, accurate and automatic monitoring and identification of the electric energy quality problem are realized, and powerful technical support is provided for detection of the electric energy quality problem of an electric power system.

The invention relates to the technical field of circuit breaker protection, and provides a dynamic current limiting and overload adaptive protection method and system of a circuit breaker. The method comprises the following steps: monitoring a circuit breaker in real time according to an online monitoring network to obtain state and environment sensing data; dividing a prediction time zone according to a predetermined time zone window, performing fault node prediction by using an analysis algorithm and sensing data, and determining nodes; performing dynamic current limiting response compensation on the circuit breaker to obtain a current limiting mechanism; performing overload risk prediction, and determining risk nodes; performing overload protection response compensation on the circuit breaker to generate a protection mechanism; and the circuit breaker is protected based on a current limiting and overload protection mechanism. The technical problem that potential faults cannot be effectively handled due to the fact that the circuit breaker lacks predictive protection before faults occur and cannot timely, accurately and dynamically adjust current-limiting and overload protection strategies is solved, and the effects of self-adaptive adjustment of dynamic current-limiting and overload protection of the circuit breaker and improvement of predictive and accurate protection are achieved.

The invention relates to the field of multi-way valves, and particularly discloses an integrated actuator type heat management multi-way valve which comprises a multi-way valve mechanism and an actuator mechanism. The multi-way valve mechanism comprises a multi-way valve body assembly, and a valve element assembly is arranged in the multi-way valve body assembly. The actuator mechanism comprises an actuator protection box assembly installed on the upper side of the multi-way valve body assembly, and an actuator assembly is installed in the actuator protection box assembly. According to the multi-way valve, the actuator assembly drives the valve element assembly to rotate in the multi-way valve body assembly, the flow direction of fluid such as cooling liquid and heating media can be accurately controlled, and the accurate control is beneficial to optimizing the performance of a heat management system; according to the thermal management multi-way valve, the actuator mechanism and the multi-way valve mechanism are integrated together and protected through the actuator protection box assembly, so that the structure of the whole thermal management multi-way valve is more compact, and the compact structure is beneficial to saving installation space and reducing system complexity and is convenient to maintain and operate.

The invention discloses an environment-friendly waterproof paint spraying device and method, and relates to the technical field of environment-friendly spraying, the environment-friendly waterproof paint spraying device comprises a bottom plate and further comprises a material uniformizing device, a liquid storage barrel is fixedly mounted at the top of the bottom plate, a feeding pipe is fixedly mounted at the top of the liquid storage barrel, and a discharging pipe is fixedly mounted on the circumferential surface of the liquid storage barrel; a high-pressure pump is fixedly installed on the left side of the discharging pipe, a hose is arranged on the right side of the high-pressure pump, a high-pressure spray head is arranged at the end, away from the bottom plate, of the hose, and the material uniformizing device comprises a servo motor, a stirring rod, a hollow rod, a driving rod, a stabilizing block, an arc-shaped plate and an extrusion block; the coating in the liquid storage barrel can be effectively turned over through the reciprocating movement of the cambered surface plate, and the coating is prevented from being precipitated or layered in the storage process, so that the quality of a sprayed coating is improved, and the phenomenon of bubbles or uneven spraying is reduced.

The invention provides a photovoltaic power generation mechanism, and relates to the field of photovoltaic power generation. A controller is installed in the power generation mechanism, moving mechanisms are inserted into the two sides of the power generation mechanism in a penetrating mode, the bottoms of the two moving mechanisms are connected through two transverse rods, and the transverse rods are connected with a pull rod mechanism through a connecting plate. When the overturning part overturns forwards, the pulling rod mechanism is driven to move downwards, the pulling rod mechanism stops pulling the connecting plate and the moving mechanism, the moving mechanism moves downwards under the action of the gravity of the moving mechanism, the controller is located in the power generation mechanism for protection, meanwhile, heat dissipation is conducted, and at night, the controller controls the overturning frame structure to overturn upwards, so that heat dissipation is conducted. The problems that a controller of a common photovoltaic power generation mechanism needs to be protected by a protection structure, aging is reduced, but the protection structure affects the heat dissipation efficiency of the controller, and the service life of the controller is affected are solved.

The invention discloses an environment situation awareness data engineering system based on multi-source data fusion, which relates to the related technical field of environment situation awareness and comprises a multi-source data acquisition module, a multi-source data processing module, an environment evolution analysis module, an ecological restoration evaluation module, an ecological system evolution module and a visual observation module. The invention further discloses an environment situation awareness method based on multi-source data fusion, which comprises the steps of collecting environment data, effectively integrating the data, and presenting the data to a terminal user in a chart by utilizing a model evolution trend, a prediction result and possible influence of environment change on human behaviors. The UEB model is suitable for various climate and topographic conditions, has high precision and reliability in a high and cold plateau complex environment, can help to analyze and predict the influence of human activities on environmental elements and the influence of environmental changes on human behaviors, deeply excavates the interaction between the human activities and the environmental changes, and improves the prediction accuracy of the human activities and the environmental changes. And insight is provided for decision makers.

The utility model discloses a reinforcing steel bar hoisting assembly, which comprises a hoisting piece and an auxiliary locking piece, the hoisting piece is fixed on a hoisting rope, the auxiliary locking piece is slidably adjusted on the hoisting rope, one end of a reinforcing steel bar can be inserted into the hoisting piece, the reinforcing steel bar can be vertically inserted into the hoisting piece, and the other end of the reinforcing steel bar can be locked by the auxiliary locking piece. According to the steel bar hoisting device, the hoisting piece is adopted, in the steel bar hoisting process, vertical hoisting can be carried out, effective protection is achieved, the steel bars are prevented from falling in the high-altitude hoisting operation, the risk source grade of the steel bar hoisting operation is reduced, meanwhile, the swing space in the steel bar hoisting process can be reduced through vertical hoisting, and object strike accidents are effectively avoided.

The invention discloses a multi-center inherited metabolic disease information integration platform, and relates to the technical field of medical treatment, according to the multi-center inherited metabolic disease information integration platform, the normalization and availability of data are improved through a data standardization module; data from different centers are integrated into a unified database through the data integration module by utilizing a data fusion technology, redundant data are removed, the problem of heterogeneous data integration is effectively solved, and the integrity and consistency of the data are improved; the privacy protection module avoids data leakage and unauthorized access; through the resource calculation management module, the resource utilization efficiency is effectively improved, and the calculation cost is reduced; and secondly, the storage resources are dynamically adjusted and allocated according to the evaluation result of the storage index Cczs, so that the optimal management of the storage resources is realized, the problems of resource waste and resource insufficiency are avoided, and the efficient operation of the system is ensured.

The invention belongs to the field of protective coatings, and relates to a Cr-based protective coating with a multi-layer structure and a preparation method of the Cr-based protective coating. The Cr-based protective coating comprises a plurality of periodic layers, and each periodic layer is composed of a Cr layer and a Cr-Al-Si-N layer. The element composition of the Cr-Al-Si-N layer is CrxAlySizN1-x-y-z, x, y and z are atomic ratios, x is larger than or equal to 0.33 and smaller than or equal to 0.43, y is larger than or equal to 0.20 and smaller than or equal to 0.27, and z is larger than or equal to 0.04 and smaller than or equal to 0.08; and the Cr-Al-Si-N layer is of a two-phase composite structure in which nanocrystals are dispersed and distributed in compact noncrystals. The multi-layer structure coating provided by the invention combines the double advantages of radiation resistance and high-temperature oxidation resistance, shows good comprehensive protection performance, and can provide effective protection for the nuclear fuel cladding tube in a complex and severe reactor environment.

A first wiring pipe and a second wiring pipe are detachably connected in a splicing mode, the inner side of the end face of the first wiring pipe is provided with an extrusion conical groove, and the end face of the second wiring pipe is provided with a rubber embedding and sealing block in a bonding mode at the position corresponding to the extrusion conical groove. According to the utility model, the end sleeves, the built-in annular air bags, the air injection pipes and the rubber sealing rings are arranged at the end parts of the first wiring pipe and the second wiring pipe, so that the built-in annular air bags can be conveniently injected with air after weak current line connection, and the built-in annular air bags are deformed after air injection; therefore, the rubber sealing ring on the inner side is driven to tightly abut against the outer side of the weak current circuit, so that the weak current circuit and the end parts of the first wiring pipe and the second wiring pipe are sealed, and the weak current wiring joints in the first wiring pipe and the second wiring pipe are protected. And external impurities are prevented from entering to influence the connection and use of the weak current line.

The invention discloses an inhaul cable based on an optical fiber technology and a cable force measuring method thereof, and the method comprises the steps: obtaining the monitoring data and state data of the inhaul cable, carrying out the temperature compensation of the monitoring data, obtaining a temperature compensation wavelength, correcting the temperature compensation wavelength, obtaining a first correction wavelength, correcting the first correction wavelength, obtaining a second correction wavelength, and obtaining the cable force of the inhaul cable. Determining a first inhaul cable force according to the second correction wavelength, constructing an inhaul cable force measurement model, optimizing the inhaul cable force measurement model according to the cable force error, and inputting monitoring data and state data of a to-be-measured inhaul cable into the optimized inhaul cable force measurement model to obtain a cable force measurement result. The inhaul cable based on the optical fiber technology is installed on a structure to obtain light wave signals, the light signals are processed, the cable force of the inhaul cable is calculated, and the cable force of the inhaul cable is measured in the using process of the inhaul cable based on the optical fiber technology.

The invention relates to the technical field of bauxite mining, in particular to a green mining method for bauxite under coal, and mainly solves the technical problems that pollutants in a goaf of an upper coal seam easily enter an aluminum layer, the recovery rate is low, an overlying rock layer easily collapses and a large amount of solid waste polluting the environment is generated in existing mining of bauxite under coal. The method comprises the following steps: S1, selecting a target rock stratum; s2, permeability transformation is conducted on the target rock stratum; s3, in-situ presplitting of bauxite; and S4, pillar-free comprehensive mechanical bag type filling mining is carried out. According to the method, old kiln water and poisonous and harmful gas in a coal seam goaf can be prevented from entering an aluminum mining working face during aluminum layer recovery, and the safety of aluminum layer recovery operation is greatly improved; ore body strength weakening can be achieved, fully-mechanized coal mining equipment loss is reduced, and fully-mechanized coal mining efficiency is improved; the recovery rate of bauxite can also be improved, and an overlying rock layer is prevented from collapsing; the coal gangue and the red mud can be treated and utilized in a large-scale and green manner, and the influence of industrial solid waste of the coal gangue and the red mud on the ecological environment is avoided.

The invention discloses a vertical-structure LED chip and a manufacturing method thereof, and relates to the technical field of semiconductors, and the manufacturing method comprises the steps of epitaxial growth, first-round photoetching processing, eutectic bonding, substrate stripping, second-round photoetching processing and chip segmentation. Wherein a pretreatment structure is obtained after the substrate is stripped, and the N-GaN layer is exposed on the surface of the pretreatment structure; the second round of photoetching processing comprises the following steps: etching the exposed N-GaN layer to form an N hole protection structure; and carrying out roughening treatment on the surface of the N-GaN layer on which the N hole protection structure is formed. According to the invention, the N hole protection structure is formed on the N-GaN layer, so that the hole channel formed by processing the P-GaN surface can be effectively protected, and the electric leakage risk of the LED chip with the vertical structure can be reduced.

The invention discloses an overload protection method for an electric drive system. The overload protection method comprises the steps of collecting temperature and / or current data corresponding to the electric drive system; respectively comparing the temperature and / or current data with a preset temperature or current overload protection threshold value and an overload pre-protection threshold value, and judging whether to limit the output torque and the power or not; wherein the overload pre-protection threshold value is smaller than the overload protection threshold value; when the temperature or the current exceeds the overload pre-protection threshold value and is smaller than the overload pre-protection threshold value, the output torque power is limited through an overload pre-protection strategy; and when the temperature or the current exceeds an overload protection threshold value, an overload protection strategy is adopted to limit the output torque power. Before the overload protection threshold value is reached, the possibility of reaching the overload protection threshold value is reduced in an overload pre-protection mode, and the operation reliability of the system is improved.

The invention provides a fixed scroll plate with an exhaust non-return function, a pump body assembly and a scroll compressor, and belongs to the technical field of compressors. According to the scroll compressor, the buffering structure is arranged, the impact force generated when the check valve plate moves downwards is relieved, abrasion and impact of the check valve plate can be effectively reduced, and therefore the durability of the check valve plate and the reliability of the whole scroll compressor are improved. Due to the buffer structure, the hard contact of the check valve plate during up-and-down movement is reduced, so that the noise generated by collision is reduced, and the operation environment of the scroll compressor is improved. The check valve plate can automatically open or close the exhaust hole according to the pressure change of the refrigerant, it is ensured that the high-pressure refrigerant can be smoothly exhausted during exhausting, the refrigerant can be prevented from flowing reversely when exhausting is stopped, and the exhaust efficiency and the overall performance of the compressor can be improved. The effective exhaust non-return function can prevent unnecessary leakage of refrigerants, energy loss is reduced, and therefore the energy efficiency of the whole system is improved.

The invention relates to the technical field of eutectic, in particular to a binding head assembly, eutectic equipment and a chip mounting method.The binding head assembly comprises a driving assembly, a suction nozzle assembly and a visual assembly, and the suction nozzle assembly is arranged at the output end of the driving assembly and comprises a suction nozzle base, a suction nozzle, a first transparent part and a second transparent part; a through hole is formed in the suction nozzle seat, and the visual assembly is aligned with the through hole; the suction nozzle is arranged at one end of the through hole, and the first transparent part is arranged at the other end of the through hole and seals a port of the through hole; a penetrating adsorption channel is formed in the suction nozzle and communicated with the through hole, and an air path connecting hole is formed in the inner wall of the through hole; the suction nozzle is further provided with a perspective observation window, the observation window and the adsorption channel are arranged in a spaced mode, projection is conducted in the axial direction of the through hole, and the projection of the observation window is located in the projection of the through hole. The binding head assembly provided by the invention can be used for carrying out high-precision positioning on a plurality of chips in the eutectic mounting process.