461results about How to "Guaranteed normal operation" patented technology

The invention relates to the technical field of artificial intelligence and Internet of Things, in particular to an inspection service management system based on artificial intelligence and Internet of Things, which comprises a data acquisition module, an edge calculation module, a task allocation module, a path planning module, an early warning module and a user interaction module. Wherein the data acquisition module is used for acquiring multi-dimensional data of environment and equipment in real time; the edge calculation module is used for carrying out preliminary analysis and processing on the multi-dimensional data; the task distribution module is used for generating inspection tasks according to inspection rules; the path planning module is used for generating an optimal path of the inspection equipment; the early warning module is used for generating an early warning signal when the potential risk is detected; and the user interaction module is used for displaying the state of the system through a visual interface. According to the invention, by realizing real-time data processing, dynamic task scheduling and path optimization, the response speed and efficiency of the system are improved, and meanwhile, the equipment fault prevention and decision-making capabilities of operators are enhanced.

The invention discloses an intelligent security and protection monitoring method and system based on image recognition. The method comprises the following steps: S1, acquiring multi-modal data; s2, performing preprocessing to generate complete target information; s3, performing real-time detection on the generated complete target information, and performing primary processing on a conventional scene; s4, based on an improved visual SLAM technology, obtaining three-dimensional information of multiple cameras; s5, when the edge device detects a potential abnormal condition, performing abnormal behavior analysis on the data by using a Swin Transform model, and optimizing a detection result in combination with the three-dimensional information of the multiple cameras; s6, performing adaptive learning on historical data by using a depth deterministic strategy gradient algorithm, and dynamically adjusting a threshold value of abnormal behavior detection; and S7, after an abnormal condition is detected, processing data through differential privacy protection and an end-to-end encryption technology, automatically controlling security and protection equipment, and giving a real-time alarm. According to the invention, image recognition and deep learning technologies are fully utilized, and accurate real-time monitoring in a complex scene is realized.

The invention discloses a seven-degree-of-freedom series-parallel structure mechanical arm for a biped robot, and relates to the field of robots, the seven-degree-of-freedom series-parallel structure mechanical arm is installed on a supporting body, and the supporting body is located on an installation fixing base. Comprising a five-degree-of-freedom series arm and a two-degree-of-freedom parallel wrist structure which is located at the front end of the series arm and connected with the series arm. According to the mechanical arm with the series-parallel connection structure, the rigidity and the bearing capacity of the mechanical arm are improved, the working space is expanded to adapt to more complex operation tasks, the stability and the reliability of operation are enhanced, error accumulation is reduced, and the accuracy of overall operation is improved.

The invention relates to the technical field of grassland monitoring, in particular to an adjustable grassland remote sensing monitoring system and method, and the system comprises a data preprocessing module, a variation trend analysis module, a self-adaptive remote sensing parameter configuration module, a grassland monitoring network layout optimization module and a remote sensing observation and intelligent estimation module. The data preprocessing module integrates historical remote sensing and ground actual measurement data and provides a data basis for subsequent analysis; the change trend analysis module calculates the change rate and the standard deviation of the key features and identifies the change trend of the grassland ecological environment; the adaptive remote sensing parameter configuration module adaptively adjusts remote sensing monitoring parameters, and the monitoring efficiency is improved; the grassland monitoring network layout optimization module optimizes the layout of the remote sensing detection unit and improves the efficiency of the monitoring network; and remote sensing observation and intelligent estimation use a spatial interpolation method to estimate the value of a future observation point, so that the workload of field measurement is reduced. The method is used for solving the technical problem that the current grassland monitoring management effect is poor.

The embodiment of the invention provides an unmanned aerial vehicle inspection method and device for power transformation equipment. The method comprises the following steps: acquiring a virtual substation model of a target substation, wherein the virtual substation model is generated by performing three-dimensional model construction on the target substation and comprises a plurality of candidate virtual substation equipment areas and a plurality of candidate virtual visual positioning identifiers; determining at least two target virtual visual positioning identifiers from a plurality of candidate virtual visual positioning identifiers included in the virtual substation model in response to an inspection triggering operation on a target virtual power transformation equipment region in a plurality of candidate virtual power transformation equipment regions included in the virtual substation model; and generating an unmanned aerial vehicle inspection route based on the at least two target virtual visual positioning identifiers. According to the scheme, the inspection route can be automatically generated on the intelligent inspection platform according to the arrangement of the virtual power transformation equipment in the transformer substation model, and the unmanned aerial vehicle in the transformer substation is pointed to fly to inspect the power transformation equipment through the inspection route.

The invention discloses a ship system fault diagnosis method and device based on multi-source information fusion, and belongs to the field of prediction and health management, and the method comprises the steps: collecting monitoring data including voltage, current, vibration acceleration, rotating speed, displacement and noise; preprocessing the monitoring data, respectively inputting each type of preprocessed monitoring data into a single parameter fault diagnosis model, and outputting a single fault diagnosis result; analyzing the plurality of single fault diagnosis results according to a multi-source information fusion diagnosis rule to obtain a fusion diagnosis result; and according to a fusion diagnosis result, determining a fault occurrence part and a fault property. According to the invention, multi-source and multi-dimensional parameters are collected to carry out fault diagnosis on a ship key system and equipment, so that the detection accuracy and credibility are improved.

The invention relates to the technical field of vehicle heat management, in particular to an energy-saving heat pump integrated heat management system which comprises a pipeline module, a motor electric control heat dissipation module, a cab refrigerating and heating module, a single battery refrigerating and heating module and a control module. Cooling liquid circulates to dissipate heat; according to the system, parts with the same functional attributes are integrated, the number of the parts is reduced, the cost is reduced, the efficiency is improved, the cost and energy consumption of the whole vehicle are reduced, refrigerants are directly communicated with the liquid cooling plate, the energy consumption of the whole vehicle is reduced, and the energy consumption of the whole vehicle is reduced. The battery pack is cooled and heated, the heat exchange efficiency is effectively improved, heat absorption and heat release are conducted on a refrigerant, PTC is omitted, waste heat generated by a motor loop is subjected to heat exchange with the refrigerant, the overall temperature of the refrigerant is increased, the waste heat of a motor is utilized, heat loss is avoided, and the endurance mileage of a vehicle is increased.

An I2C bus state monitoring and fault recovery and isolation circuit is applied to an electronic system, the electronic system is provided with a master device and an I2C bus which is electrically connected with a plurality of slave devices to communicate with each other, and a data line and a clock line of the master device are correspondingly and electrically connected with a serial data line and a serial clock line of the I2C bus; the I2C bus state monitoring and fault recovery and isolation circuit reads a data signal transmitted by the data line and a clock signal transmitted by the clock line, and analyzes the data signal and the clock signal to obtain address information and a bit representing read / write operation. When the bit representing the read / write operation is received and the logic relationship between the data signal and the clock signal is judged not to accord with the I2C bus transmission protocol, and a slave device communicated with the master device is judged to be faulty according to the bit representing the read / write operation, the slave device is found according to the address information and is subjected to troubleshooting action; therefore, the I2C bus is ensured not to be influenced by the fault device and can still maintain normal operation.

The invention discloses an anti-condensation electric power ring main unit based on optical radiation heating, and relates to the technical field of ring main units, and the anti-condensation electric power ring main unit comprises a composite mechanism. According to the anti-condensation power ring main unit based on optical radiation heating, through the design of a composite mechanism, the composite shell is used for storing and placing electronic elements, in the daily operation process of the electronic elements, the temperature in the composite shell rises, the temperature difference between the interior and the exterior of the equipment is large, and condensation occurs in the equipment; the heater adopts optical radiation heating to prevent condensation, mainly converts optical radiation energy into heat energy, increases the temperature of an object or a space, and enables the temperature of the surface of the object to be higher than the dew point temperature, so that water vapor is prevented from being condensed into dewdrops on the surface of the object, the water vapor is absorbed through the moisture-proof mechanism, and the interior of the equipment is kept dry. And the ventilation mechanism is used for ventilating the interior of the composite shell, so that the temperature difference between the interior and the exterior is reduced, the probability of condensation is reduced, and the equipment is protected to a certain extent.

The utility model discloses a wear-resistant tensile cable, and relates to the technical field of cables. A wear-resistant tensile cable comprises a reinforcing core, and the circumferential direction of the reinforcing core is fixedly connected with three partition plates which are uniformly distributed at intervals. The number of the wire cores is three, and the three wire cores are distributed between the adjacent partition plates at intervals. The outer side of each wire core is wrapped with a shielding layer. The space between the wire core and the partition plate is filled with a refractory material; a mica tape layer is wrapped on the outer side of the refractory material; a wrapping layer, a tensile layer, a fiber reinforcing layer and a wear-resistant sheath layer are sequentially wrapped on the outer side of the mica tape layer from inside to outside; a plurality of axially-distributed wear-resistant convex edges are arranged on the outer side of the wear-resistant sheath layer in the circumferential direction at intervals; wherein a plurality of tensile ropes are embedded in the tensile layer; the wire core is formed by matching and twisting copper wires and aramid fibers. According to the utility model, the wear-resistant tensile cable is designed, the use safety of the cable can be effectively improved, and the normal operation of equipment is ensured.

The invention provides a load regulation and control strategy considering multiple market superposition, and relates to the technical field of power systems. The method comprises the following steps: S1, inputting load side resource feature data of multiple markets; s2, calculating indexes of the fluctuation rate, the peak-valley difference ratio, the discharge load support rate, the load transfer capability and the load interruption capability of each resource main body as feature vectors of each resource main body, constructing a feature vector set of each resource main body, and hierarchically aggregating the feature vectors in the feature vector set of all the resource main bodies by adopting a DBSCAN clustering algorithm; s3, on the basis of clustering results of all the feature vectors, in combination with constraint conditions, establishing a load side resource aggregation model with the lowest operation cost as an objective function; and S4, calling a commercial solver to solve the load side resource aggregation model to obtain an optimal load side resource hierarchical aggregation scheme. According to the invention, the problems of heterogeneity of each load resource, difference in response capability and low enthusiasm of users participating in demand response in the existing load management can be effectively solved.

The invention relates to the technical field of intelligent operation and maintenance, and discloses an intelligent fault analysis and diagnosis method and system for urban rail power supply equipment, and the method comprises the steps: obtaining the operation data and fault data of the urban rail power supply equipment; performing fault early warning analysis according to the operation data to obtain a fault early warning result; fault recording diagnosis is carried out according to the fault data, and a preliminary fault diagnosis result is obtained; and performing comprehensive diagnosis according to the fault early warning result and the preliminary fault diagnosis result to obtain a final fault diagnosis result. According to the method, early warning can be carried out by finding the early fault hidden danger of the power supply equipment, comprehensive diagnosis is carried out according to the fault early warning result and the preliminary fault diagnosis result, the fault reason can be quickly positioned, the professional ability requirement of operation personnel is greatly reduced, the fault handling efficiency is improved, and the reduction of the operation manpower cost and the time cost is realized.

The utility model discloses sealing strip punching equipment with an adjustable strip feeding angle, which comprises a rack, a circulating transportation module, a rotary strip loading trolley device, a group of integrated punching devices and a strip loading positioning module, and is characterized in that the rotary strip loading trolley device comprises a sealing strip rotary trolley and a lifting driving mechanism; the sealing strip rotating trolley comprises a trolley rotating conveying mechanism and a trolley pressing strip rotating driving mechanism, the structure of punching equipment is improved, a single-side single-cavity mode is adopted for compact distribution, a plurality of punching stations are combined into one station, oil cylinders are arranged on the punching stations in a centralized mode to serve as punching power, and therefore the punching efficiency is improved. The size of equipment is reduced, and the space utilization rate is increased; the sealing strip is rotated to a required strip feeding angle by adopting the servo rotary trolley so as to deal with the limitation of the punching power direction caused by centralized configuration of the oil cylinder, and the stability and the convenience during product punching are improved.

The utility model discloses a rotatable sealing strip product trolley convenient for punching, which comprises at least one sealing strip trolley and a lifting driving mechanism, the sealing strip trolley comprises a trolley rotating conveying mechanism and a trolley pressing strip rotating driving mechanism, the trolley pressing strip rotating driving mechanism is arranged above the trolley rotating conveying mechanism, and the lifting driving mechanism is arranged above the trolley pressing strip rotating driving mechanism. The two are matched with each other; the output end of the lifting driving mechanism is connected with the fixed connecting plate, and the fixed connecting plate is connected with the trolley pressing strip rotation driving mechanism. The trolley convenient to punch and capable of rotating the sealing strip product is reasonable in structural design, the strip loading trolley is arranged on a single side, the strip loading module of the trolley is driven by the trolley pressing strip rotation driving mechanism to rotate to any angle so as to deal with the limitation of the punching direction caused by centralized configuration of an oil cylinder on a single-side multi-cavity tool, and the punching efficiency is improved. And the stability and the convenience during impulse are effectively improved.

The low-resistance carrier roller device comprises a carrier roller, a bearing seat and a first sealing assembly, the carrier roller comprises a roller and a rotating shaft, the roller is arranged on the rotating shaft in a penetrating mode, the bearing seat comprises a shell with an opening and a bearing arranged in the shell, one end of the rotating shaft penetrates through the opening and is arranged on the bearing in a penetrating mode, and the other end of the rotating shaft is connected with the first sealing assembly. The first sealing assembly is arranged in the shell and arranged on the rotating shaft in a penetrating mode, the inner circumferential face of the first sealing assembly and the outer circumferential face of the rotating shaft are arranged at intervals in the radial direction of the rotating shaft and are filled with magnetic liquid, and the first sealing assembly is located on the side, close to the opening, of the bearing. The first sealing assembly seals the opening with the magnetic liquid. The low-resistance carrier roller device has the advantages of being low in resistance, small in leakage, long in service life and the like.

The invention relates to the technical field of machine learning, in particular to a dynamic productivity subpackage optimization method and system based on machine learning, and the method comprises the steps: collecting production line data, subpackage provider data and project data, and carrying out the data preprocessing, thereby improving the accuracy and reliability of the data, and facilitating the construction of a more accurate machine learning model; by constructing a machine learning model, dynamic productivity prediction, intelligent grouping of subpackages and project optimization are realized; a productivity adjustment strategy, a subpackage optimization strategy and a resource allocation optimization strategy are formulated in a targeted manner, and dynamic adjustment is performed, so that the production efficiency and the project quality are remarkably improved; by setting up a comprehensive feedback channel and quantitative analysis, continuous optimization of productivity and resource allocation is facilitated, and meanwhile, the flexibility and adaptability of decision making are improved. The method is used for solving the technical problems of low production efficiency, unstable project quality and unreasonable resource allocation existing in current industrial production management.

The invention relates to a tethered airship self-destruction control method which specifically comprises an airborne control core and a self-destruction standby system so as to ensure that a self-destruction task can be effectively executed under different fault conditions. The airborne control core judges whether the airship exceeds a safety range or not through the GPS module, or receives a remote self-destruction instruction through the wireless communication module to trigger a self-destruction program. The self-destruction process comprises the steps that the valve push rod driving circuit rapidly deflates, the electric heating wire driving circuit burns through the ball body, the lithium battery burning explosion trigger circuit triggers battery burning explosion, and thorough damage is ensured. If the main system fails, the standby control module supplies power through a standby battery, takes over a self-destruction task, keeps communication with the ground, and triggers the parachute to release by utilizing a time delay mechanism or an air pressure sensor when the height sensor fails, so that the landing safety is guaranteed. And the main control program performs byte-by-byte deletion through a bootloader program in a self-destruction process, so that data leakage is prevented.

The invention provides a vehicle-mounted charger with a three-dimensional water cooling loop, a power assembly and an electric vehicle. The electrical assembly of the vehicle-mounted charger is used for charging and discharging a power battery of the electric vehicle. The shell of the vehicle-mounted charger comprises a cover plate and a containing groove. The cover plate is used for enclosing a containing groove in the first direction, and the containing groove is used for containing an electrical assembly of the vehicle-mounted charger. The three-dimensional water cooling loop of the vehicle-mounted charger comprises a first water cooling heat dissipation plate, a second water cooling heat dissipation plate, a shell water inlet flow channel and a shell water outlet flow channel. The first water-cooling heat dissipation plate and the second water-cooling heat dissipation plate are arranged in a stacked mode in the first direction. Electrical components of the vehicle-mounted charger are arranged between the first water-cooling heat dissipation plate and the second water-cooling heat dissipation plate. The first water-cooling heat dissipation plate and the second water-cooling heat dissipation plate are utilized to form double-sided heat dissipation on the electrical assembly, and the cooling effect on the vehicle-mounted charger can be enhanced.

The utility model relates to the technical field of file cabinets, in particular to a moisture-proof file cabinet for office file data management, which comprises a cabinet body, a cabinet door is movably connected to the left end of the cabinet body through hinges, four partition plates are fixedly connected to the inner wall of the cabinet body, and exhaust fans are fixedly connected to the lower ends of the three partition plates on the upper portion and the inner wall of the cabinet body. Four grooves are formed in the left inner wall and the right inner wall of the cabinet body respectively, storage boxes are movably connected to the upper ends of the four partition plates, and the left ends and the right ends of the four storage boxes are slidably connected with the grooves respectively. According to the moistureproof file cabinet for office file data management, through the arrangement of the storage box and the exhaust fan, the flexibility of storing and taking data and the controllability of humidity in the cabinet body are improved, the space is fully utilized, classification is facilitated, the object taking efficiency is improved, meanwhile, the situation that the storage requirement cannot be met is prevented, and the service life of the file cabinet is prolonged. And the archive data storage quality is influenced.

The invention relates to a portable standard gas supply device and method. The portable standard gas supply device comprises a gas source, a pressure reducing valve, a high-pressure stop valve, a pressure stabilizing chamber, a micrometering valve, a gas distribution chamber, an absolute pressure sensor, a first capacitance film gauge, a second capacitance film gauge, a Pirani vacuum gauge, a first high-vacuum angle valve, a second high-vacuum angle valve and a vacuumizing system. According to the portable standard gas supply device and method, through reasonable design, the device and the pipeline have the functions of heating, gas extraction and purification, replacement, portability and the like, the gas purity is guaranteed from the source, pollution of residual gas or organic matter is reduced, measurement errors caused by unreasonable design are reduced, and the measurement accuracy is improved. The accuracy of the prepared standard gas pressure and components is ensured to the maximum extent; the gas distribution precision is improved, the uncertainty of the gas distribution concentration is reduced, the requirement of field dynamic gas distribution can be met, and the method is simple, feasible and easy to operate.

The aquaculture feeding system comprises a floating plate and a machine body, a stirring tank and a material distributing base are arranged in the machine body, and the stirring tank and the material distributing base are connected through a connecting pipe; the material distributing base is sequentially connected with a discharging pipe, a material distributing plate and a plurality of discharging ports. A material distribution rotating shaft is mounted in the material distribution seat, and is provided with a plurality of separation feeding mechanisms; a dredging mechanism is arranged in the material distributing seat; a reverse stirring mechanism and a radial stirring mechanism are arranged in the stirring tank. A stirring rotating shaft is arranged in a stirring tank, a plurality of third stirring blades, a plurality of first stirring blades, a reverse stirring mechanism and a radial stirring mechanism are arranged on the stirring rotating shaft, and second stirring blades oppositely rotate around the axis of the stirring tank relative to the third stirring blades and the first stirring blades; the plurality of stirring plates rotate around the radius direction of the stirring tank, and the feed moves in the radial direction and the axial direction in the stirring tank and is uniformly and fully stirred, so that a better stirring effect in the stirring tank is realized. The method comprises the steps of S1, S2 and the like.

The utility model relates to the technical field of power distribution control contacts, and discloses a power distribution control contact convenient for fixing wire ends, which comprises a contact body and a plurality of wiring grooves arranged on the contact body, a plurality of through grooves matched with the wiring grooves are arranged at the top and the bottom of the contact body, and the lower end of the inner wall of each through groove is slidably connected with a moving block. The top of the moving block is fixedly connected with a sliding rod, the upper end of the sliding rod extends out of the contact body and is in sliding connection with the contact body, and the outer wall of the sliding rod is sleeved with a first spring. According to the power distribution control contact convenient for fixing the wire end, the sliding rod is pressed downwards forcibly to enable the moving block to move downwards, and after the moving block moves downwards to abut against a wire, the sliding rod can be well limited and fixed through the limiting assembly, so that the power distribution control contact has the advantages that people can install and fix the wire end more conveniently, and the service life of the wire end is prolonged. And the connection between the electric wire and the electric contact is firmer, so that the stability of the electric contact is higher during use.

The invention discloses a power electronic transformer, comprising a transformer end shell, wherein the right end of the transformer end shell is fixedly connected with a wire plug end, a wire plug hole is opened on the side of the wire plug end, a wire board is fixedly connected to the right inner wall of the transformer end shell, a lower pressure block is arranged above the wire board, a pressure line is fixedly connected to the bottom surface of the lower pressure block, a sliding vertical rod is fixedly connected to the top surface of the lower pressure block, an elastic spring is arranged on the outer side of the sliding vertical rod, a connecting rod buckle piece is slidably connected to the outer side of the sliding vertical rod, and an extrusion spring piece is fixedly connected to the top end of the sliding vertical rod. The invention has the characteristics of strong practicability and easy to clean dust to prevent the heat dissipation structure from being affected.

The invention relates to the technical field of batteries, in particular to an electrode shell for online optical monitoring, a preparation method and a battery assembly. The electrode shell for on-line optical monitoring comprises a sleeve, a lens assembly and an electrode conductor, the lens assembly comprises a first support and a lens body, the first support is embedded into one end of the sleeve in a sealed mode and electrically connected with the sleeve, and the lens body is fixed to the first support in a sealed mode. And the electrode conductor is embedded into the sleeve and is electrically connected with the sleeve. According to the electrode shell for on-line optical monitoring, the preparation method and the battery assembly provided by the invention, direct optical monitoring on the internal state of the battery monomer is realized, and various optical monitoring means can be compatible; the lens body, the first bracket and the sleeve are in sealed connection, so that good air tightness is achieved, normal operation of the single battery is guaranteed, and non-interference measurement is realized; an existing battery monomer production process is compatible, so that the cost increase caused by process transformation is avoided; and the system can be compatible with existing electric equipment, charging and discharging equipment and the like.

A capacitance measuring circuit includes a charge-to-voltage converter including at least one first variable capacitor, an excitation signal generating circuit, a differential circuit, a first switching circuit, and at least one second variable capacitor. Wherein a parasitic capacitance value in a sensing capacitance value sensed by a capacitance sensor is reduced by at least one first variable capacitance. The excitation signal generating circuit is used for generating and connecting a first excitation signal to the capacitive sensor and generating and connecting a second excitation signal to the at least one first variable capacitor, the first excitation signal and the second excitation signal are opposite in phase, and the voltage amplitude of the first excitation signal is different from that of the second excitation signal. The inverted input end of the differential amplifier is used for receiving a sensing capacitance value from the capacitance sensor.

The utility model provides a temporary supporting device for connecting channel duct piece reinforcement, which comprises a support, the support comprises an arc-shaped supporting piece, a bearing unit is arranged below the arc-shaped supporting piece, and a plurality of screw jacks are arranged in the arc-shaped supporting piece; the top of the vertical supporting piece is connected with the arc-shaped supporting piece, and the bottom of the vertical supporting piece is connected with the bearing unit; one end of the transverse supporting piece is connected with the vertical supporting piece, and the other end of the transverse supporting piece is connected with the arc-shaped supporting piece. The vertical supporting pieces are arranged on the bearing units, the arc-shaped supporting pieces are fixed to the duct pieces through the vertical supporting pieces and the transverse supporting pieces, a track laying construction space and a track laying machine passing space are formed, and prestress is applied to the supports through the screw jacks arranged on the arc-shaped supporting pieces; according to the construction method, it is guaranteed that the duct pieces do not deform in the surrounding soil freezing and unfreezing process in freezing method construction, track laying construction and operation are guaranteed, meanwhile, a system formed by the support can also be used for duct piece holing, reinforcing and supporting, and the overall structure is simple.

The invention discloses a hyper-arithmetic scheduling server and a resource management method, and relates to the technical field of communication, the method comprises the following steps: 1, scheduling server data acquisition: acquiring server task requirements and resources acquired by a system; 2, preprocessing and classifying the collected server resource information; 3, performing classified management on effective resources; 4, constructing and updating an original scheduling strategy according to task requirements of workers; 5, monitoring server resources in real time; and 6, protecting the resource information of the scheduling server. According to whether the monitored resources are in the safe state or not, an alarm mechanism is established, related data are recorded, an external environment manager is warned of dangerous situations, the situation of resource leakage is blocked in time, losses caused to people are avoided, and the safety of the computing power scheduling server system is effectively guaranteed.

The invention discloses a power distribution network post-fault load recovery method considering minimum duration, which comprises the following steps of: 1, establishing a target function of a power distribution network post-fault load recovery model by taking maximization of weighted load recovery quantity and maximization of minimum duration of a micro-grid as targets; 2, establishing a power distribution network radial constraint by considering the running radial performance of the power distribution network; 3, considering the minimum duration of the micro-grid, and establishing the minimum duration constraint of the micro-grid; 4, mobile emergency power supply vehicle constraints are established; 5, considering operation safety of the power distribution network, and establishing power flow balance and safe operation constraints of the power distribution network; and 6, solving the power distribution network post-fault load recovery model, and obtaining a power distribution network post-fault load recovery scheme. According to the method, the operation safety of the power distribution network is ensured, the problem of unbalanced power flow is avoided, the minimum duration time of the micro-grid and the mobile emergency power supply vehicle are cooperatively considered, the load recovery method after the power distribution network breaks down is effectively obtained, and the power failure loss is reduced.

The utility model relates to the technical field of grouting pipelines, and discloses a backflow prevention device for a post-grouting pipeline, which comprises a pipe body, a grouting port is arranged at the upper end of the pipe body, a grout outlet is arranged at the lower end of the outer wall of the pipe body, a moving block is slidably connected to the lower end of the inner wall of the pipe body, and a circular groove is arranged at the bottom of the moving block. The top of the inner wall of the circular groove is fixedly connected with a spring, the lower end of the spring is fixedly connected with the bottom of the inner wall of the pipe body, and the top of the moving block is fixedly connected with a connecting block. According to the backflow preventing device for the post-grouting pipeline, when grouting is stopped, the moving block can move upwards under the action of the spring, the moving block drives the baffle to move upwards through the connecting block while moving upwards, and through the arrangement, the backflow preventing device has the advantages that after grouting of the grouting pipeline is stopped, the baffle can move to the position above a grout outlet under the action of the spring, and therefore the backflow preventing effect is achieved. Therefore, a good sealing effect on the grouting pipeline is achieved, the situation that cement grout flows back is effectively prevented, the backflow control efficiency is high, and the cost is low.

The invention belongs to the field of flaw detection, and particularly relates to a preventive inspection and maintenance method, system and equipment based on airport apron high-value special vehicles and unpowered guarantee equipment. The objective of the invention is to solve the problems of poor detection accuracy in a severe environment, difficulty in signal receiving caused by strong noise interference, and influence on detection accuracy when a complex material structure is processed. The method comprises the following steps: manufacturing a flaw detection probe based on an included angle and a thickness between a piezoelectric wafer and the bottom surface of a wedge block, integrating a temperature sensor and a humidity sensor, detecting equipment to be detected by using the flaw detection probe, carrying out filtering processing on a signal, compensating an ultrasonic propagation speed and attenuation of an ultrasonic signal, and obtaining damage data. And extracting problem feature data, obtaining a damage classification result and a damage degree result, and maintaining the to-be-detected equipment. According to the invention, the ultrasonic detection precision is improved, the environmental adaptability is enhanced, the maintenance cost is reduced, the maintenance process is optimized, and the safety of personnel and aircrafts is guaranteed.