45results about How to "Solve stress" patented technology

The invention belongs to the technical field of aircraft atmospheric data measurement equipment, and particularly relates to an intelligent towing cone system for test flight calibration, which is used for calibrating flight parameters such as height and speed output by an aircraft atmospheric data system and providing a parameter correction basis. The dragging cone system comprises a static pressure tube, a tail cone body, an optical fiber sensor, a dragging structure and an optical fiber sensing analyzer. According to the invention, the length of the pressure gas circuit of the towed cone system can be shortened, the problem of pressure delay in the existing towed cone product can be solved, the real-time continuous measurement of the pressure of the towed cone system is realized, the dynamic flight calibration of atmospheric parameters is realized, and the test flight calibration efficiency is improved.

The invention provides an engineering operation vehicle load analysis method which comprises the following steps: predicting the change trend of the pressure of a hydraulic cylinder according to the descending speed and the load capacity of a fork, establishing a pressure prediction model through a support vector machine algorithm, and when the predicted pressure exceeds a safety threshold value, controlling the opening degree of a cushion valve in advance to realize predictive control of the pressure; a fuzzy rule base is established by combining the loading capacity of a forklift, the descending speed of a pallet fork and the pressure of a hydraulic cylinder, fuzzy self-adaptive control over the opening degree of a cushion valve is achieved, the opening degree of the cushion valve is automatically adjusted according to different working conditions, and it is ensured that the pressure of a hydraulic system is stabilized within a safety range. Establishing a nonlinear mapping relation among the loading capacity, the descending speed of the pallet fork and the opening degree of the buffer valve, training and optimizing a neural network model, achieving intelligent control over the opening degree of the buffer valve, and automatically adjusting the opening degree of the buffer valve according to the loading capacity and the descending speed of the pallet fork which are collected in real time.

The utility model discloses an immersion type liquid cooling energy storage battery system, it includes: holding frame, a plurality of battery packs and refrigeration device, battery packs are installed in holding frame, each battery pack includes box body, a plurality of battery modules and ventilation device, box body is provided with liquid inlet interface and liquid return interface, the plurality of battery modules are arranged in the box body at interval, and the refrigeration device is arranged in the box body. The ventilation device is used for balancing air pressure inside and outside the battery pack; the refrigerating device is provided with a plurality of first connecting pipes and second connecting pipes which are communicated with the liquid inlet interface and the liquid return interface, the refrigerating device conveys the cooling liquid to each battery pack through the first connecting pipes and recycles the cooling liquid from each battery pack through the second connecting pipes, and the refrigerating device is used for controlling the temperature of the cooling liquid respectively. The immersed liquid-cooled energy storage battery system can provide an independent liquid-cooled circulation loop for a plurality of battery packs, so that the battery cells of the battery packs can meet the temperature uniformity requirement, the problem of overhigh air pressure of the battery packs is solved, and the occurrence of thermal runaway of the battery cells is effectively inhibited.

The embodiment of the invention provides a soluble bridge plug circulation test device and method. The device comprises a circulation pump, a circulation pipeline, a circulation visual connector, a circulation sleeve, a filtering device and a circulation storage tank. The circulating pump is connected with the circulating storage tank through the circulating pipeline, and the circulating pump is used for conveying a mineralization solution to the circulating storage tank; the circulating sleeve is arranged between the circulating pump and the circulating storage tank, and the circulating visible connector is connected to the circulating sleeve; the filtering device is arranged between the circulating sleeve and the circulating storage tank; according to the oil and gas field underground operation simulation device, the structure of the circulating storage tank and the circulating pump is adopted to achieve simulation of the environment of oil and gas field underground operation, the contradiction between temperature and pressure two-value changes is structurally solved, and the functional requirements of the conditions required by the test are met.

The invention discloses a control method and system for refrigerant storage of a vehicle, the vehicle and a readable storage medium, and belongs to the technical field of vehicles. The control method comprises the steps that in response to a starting instruction of independent refrigeration of a passenger compartment, a battery pressure balance valve is controlled to be opened, a battery electronic expansion valve is controlled to be closed, and a refrigerant is driven to flow from a cooling loop of the passenger compartment to a cooling loop of a power battery; according to the actual extraction duration of the refrigerant and the high-pressure value of the compressor, whether extraction of the refrigerant is stopped or not is judged; if yes, a battery pressure balance valve is closed, the opening degree of a battery electronic expansion valve is adjusted to a first preset opening degree, and the refrigerant is stored in a cooling loop of the power battery; and according to the actual storage duration of the refrigerant, the superheat degree of the passenger compartment evaporator outlet and the refrigerant saturation temperature of the compressor outlet, whether storage of the refrigerant is stopped or not is judged. According to the invention, the amount of the refrigerant in the cooling loop of the passenger compartment can be adjusted, and the problems of overhigh pressure and overlarge energy consumption caused by excess refrigerant can be solved.

The invention discloses a lossless compression and decompression method based on time series data, which is characterized in that a sampled numerical value, a timestamp and a quality code are written into a cache when one piece of data is sampled, and direct write-in operation on a time series database can be reduced through a cache mechanism, so that the pressure of the database is reduced, the response speed of a system is improved, and the cache is subjected to local processing; the preprocessing step may comprise operations such as data cleaning, deduplication and sorting, the operations are beneficial to reducing redundant data, improving compression efficiency and ensuring the quality of compressed data, the preprocessed data are compressed according to the sequence of ID, starting time, ending time, quantity, timestamp, quality code and numerical value, the data are compressed according to a specific sequence, and the compression efficiency is improved. And the decompression process is a process of recovering the compressed data to an original state, so that the problems of high read-write pressure and high storage pressure of an upper computer of a traditional wind power control system are solved.

The invention discloses a data migration method and device, equipment, a storage medium and a computer program product, and relates to the technical field of data migration, and the method comprises the steps: responding to a node splitting request, carrying out the statistics of a fragmentation factor corresponding to each piece of data in a preset to-be-split node, and obtaining a fragmentation factor range statistical result; dividing data in the to-be-split node into two groups according to a fragment factor range statistical result to obtain to-be-migrated data; and migrating the to-be-migrated data from the to-be-split node to the target node through the management node. In the application, when the load of the to-be-split node reaches the load threshold, node splitting and data migration are carried out according to the data fragmentation factor in the split node, so that the system can adapt to the distribution condition of the data along with the actual use of the data. Therefore, the problem that the storage and processing pressure is unbalanced due to the fact that an existing data storage method cannot be dynamically adjusted is solved, and the method is more suitable for application scenes of mass data and high-concurrency access.

The utility model relates to the technical field of ultrapure water equipment, in particular to a pipeline water circulation control device which comprises an operation table and a regulation and control mechanism. The regulation and control mechanism comprises a water storage unit, a main control box and a monitoring assembly, the water storage unit is fixedly connected with the operation table, the main control box is fixedly connected with the operation table, the monitoring assembly comprises a water inlet pipe, a first valve, a water supply pump, a water supply pipe, a water pressure sensor, a flow sensor and an auxiliary part, the water inlet pipe is fixedly connected with the water storage unit, and the first valve is fixedly connected with the water storage unit; the water supply pump is fixedly connected with the operation table, the water supply pipe is fixedly connected with the output end of the water supply pump, the water pressure sensor is fixedly connected with the water supply pipe, the flow sensor is fixedly connected with the water supply pipe, and the auxiliary part is fixedly connected with the water supply pipe, so that the water pressure and flow of pipeline water supply can be monitored in real time, the rotating speed of the water supply pump set is automatically adjusted, and energy consumption is optimized. The water quality stability is improved, and the breeding of bacteria and biological membranes is reduced.

The invention relates to a communication system, a communication method and a cleaning robot. The communication system is suitable for a cleaning robot of a photovoltaic panel array, the cleaning robot comprises a main adsorption control module, a first cleaning control module and a second cleaning control module, and the communication system comprises a first serial port communication module and a second serial port communication module. The first serial port communication module is arranged between the first cleaning control module and the main adsorption control module and used for achieving serial port communication, and the second serial port communication module is arranged between the second cleaning control module and the main adsorption control module and used for achieving serial port communication. Through the special serial port communication module, each control module of the cleaning robot can quickly and accurately exchange information, so that the control response speed and the operation efficiency of the whole cleaning robot are improved.

This invention relates to the field of geological engineering technology, and in particular to an experimental method for determining the subcritical fracture toughness of fractures under well-closing conditions in shale reservoirs. The method comprises: obtaining a first shale sample and a second shale sample; placing the first shale sample in an experimental system and injecting fracturing fluid into the system until subcritical propagation occurs, then determining the peak pressure required for subcritical propagation; placing the second shale sample in the experimental system and injecting fracturing fluid to the preset well-closing pressure value, without injecting fracturing fluid, then determining whether subcritical propagation occurs in the second shale sample and the time required for subcritical propagation; and finally, calculating the corresponding subcritical fracture toughness. The advantage of this invention is that it enables the determination of whether subcritical propagation occurs in shale gas reservoirs under well-closing conditions, and the calculation of subcritical propagation fracture toughness, providing important theoretical basis and reference for the construction design and scheme optimization of deep shale gas reservoirs.

This application provides a pressure tank pneumatic control system and an intelligent water purifier, specifically relating to the field of fluid pressure control technology. The system includes: a pressure tank body, internally divided into a purified water chamber and an air chamber by a diaphragm; the purified water chamber is connected to the inlet and outlet via a first pipe, and the air chamber is connected to the air supply port via a second pipe; a pressure detection device, located on the first pipe, for detecting real-time pressure data; an inflation actuator, located on the second pipe, for controlled inflation of the air chamber; and a control device electrically connected to both the pressure detection device and the inflation actuator. The control device is configured to: activate the inflation actuator to inflate the air chamber when the real-time pressure data is below the lower limit of the target pressure range; and stop the inflation actuator from inflating the air chamber after a first preset time interval from when the real-time pressure data enters a preset buffer zone. The preset buffer zone is located within the target pressure range and adjacent to its upper limit. This application solves the problems of repeated start-stop cycles, insufficient inflation, or apparent over-inflation.

The present application relates to the technical field of material performance testing, and discloses a kind of test methods for evaluating the chemical solvent penetration resistance of reinforced plastic, comprising the following steps: constructing inverse transfer function to compensate platform lag, using historical strain data to predict the starting time of microcrack opening in the next cycle, combining platform inherent delay to calculate instruction sending time, based on stiffness attenuation rate calculated in real time to adaptively adjust the best disturbance frequency, using inverse transfer function to generate modified disturbance instruction and superimposed injection, deducting fluid viscous damping work previously calibrated from single cycle data to obtain effective dissipation density, determining failure end point based on the second derivative change of effective dissipation density sequence.The present application realizes the time synchronization of pressure wave and crack opening through prediction feedforward strategy, maintains deep penetration driving force using adaptive disturbance, and eliminates fluid damping interference through energy decoupling mechanism, improving the authenticity and result accuracy of stress-assisted solvent penetration test.

The utility model provides a bent pipe arc demolding core-pulling mechanism and a core-pulling mold, the bent pipe arc demolding core-pulling mechanism comprises a first core-pulling assembly and a second core-pulling assembly, the first core-pulling assembly comprises a first core-pulling driving device and a first core-pulling head, the second core-pulling assembly comprises a second core-pulling driving device and a second core-pulling head, the first core-pulling head is provided with a lead angle mold core moving part, and the second core-pulling head is provided with a lead angle mold core moving part. And the lead angle mold core moving part can be used for shaping the lead angle in the elbow pipe. The bent pipe core-pulling mechanism has the beneficial effects that the problems that due to the arrangement of the bent pipe core-pulling mechanism in the prior art, the inner sharp corner problem of the bent pipe is obvious, and the flow and the pressure of fluid are affected can be solved, the inner lead corner of the bent pipe is shaped independently through the product structure and the lead corner mold core moving part, so that the lead corner is an arc surface, and the production efficiency is improved. The probability that the flow and pressure of fluid are affected by the shape of the lead angle is effectively reduced, the lead angle mold core moving part can be driven to be separated from or close to the inner lead angle of the bent pipe through the first core pulling assembly, it is guaranteed that the core pulling efficiency is quite high, and the competitiveness of an enterprise is improved.

This utility model relates to the field of pipe support technology and discloses an adjustable support hanger for pump room pipe installation. It includes a support base with connecting arms on both sides. The upper side of the support base has an upward-facing cavity. A threaded rod is threadedly connected to the lower side of the support base. A lifting rod is fixedly connected to the upper end of the threaded rod. A conical block is rotatably connected to the lower outer wall of the lifting rod. Clamping plates are provided on both sides of the conical block. The opposing sides of the two clamping plates and the upper side of the lifting rod are used to fit against the outer wall of the pipe. This utility model, through the connecting arms, support base, threaded rod, conical block, lifting rod, clamping plates, and cavity, achieves the function of fixing pipes of different sizes. This solves the problem of needing to purchase hangers of corresponding sizes when installing pipes of different diameters, resulting in a large variety of spare parts and increased procurement costs and inventory pressure.

The utility model provides a manual hair removal cutter head floating assembly, which relates to the technical field of hair removal cutters and comprises a shell assembly, the shell assembly comprises a front clamping block, a blade support is movably connected in the front clamping block, a clamping frame is arranged on the outer side of the blade support, and a handle connecting seat is arranged on the outer side of the clamping frame; the floating attaching assembly comprises an inner transverse plate fixedly connected to the interior of the clamping frame, and elastic pieces are fixedly connected to the four corners of the outer side of the inner transverse plate; by means of the design, the effects of dynamic floating, multi-direction micro-inclined attaching and automatic resetting of the tool bit along with the curved surface of the skin are achieved, pressure is evenly buffered through elastic deformation of the elastic piece, and meanwhile stable sliding is guaranteed through clamping limiting of the clamping hook block and the installation clamping groove; therefore, the problems of difficulty in adapting to complex curved surfaces of human bodies, cutting residues caused by insufficient fitting and overlarge local pressure are solved.

The present invention discloses a high-pressure hydrogen sampling device, including a shell placed on a plane, and a high-pressure spiral tube is installed on the left side of the shell, and a control valve is provided at one end of the high-pressure spiral tube, and the high-pressure spiral tube has high pressure resistance and can be adjusted in any direction; a pressure regulator is arranged inside the lower part of the shell, and a high-pressure metal hose is installed at the left end of the shell; two sets of relief valves and pressure gauges are arranged inside the upper part of the shell; and also include: a bearing frame plate, which is fixedly installed on the outer side of the left end of the shell; a storage tank, which is spirally opened inside the bearing frame plate; a first rotating rod, whose movable shaft is installed inside the bearing frame plate; and a protective angle, which is installed at the upper corner of the shell. The high-pressure hydrogen sampling device is easy to control, solves the problem of difficult and dangerous pressure control of manual switch valves, and is convenient for storing the high-pressure metal hose for carrying and use.

The utility model relates to the technical field of rail transit vehicle equipment, in particular to a drainage device for a through channel, which mainly structurally comprises a liquid collecting container, at least one water inlet, at least one water outlet, at least one plug and at least one water outlet, the at least one plug closes the at least one water outlet in a pressure-tight manner, and the at least one buoyancy body is arranged in the collecting container and is connected with the at least one plug in a sliding and rotating manner, so that the at least one plug is moved from a position for closing the drainage pipe to a release position by utilizing buoyancy of the buoyancy body in the liquid; when enough liquid is collected in the collection container, the liquid can be automatically discharged, in addition, the plug always closes the drainage pipe, the water outlet is closed outwards, when the drainage device is installed on the frame of the hinged type vehicle through channel in use, and the cavity wall of the frame can serve as the side wall or the base of the collection container, the size of a single drainage device can be large enough, and the drainage device can be used for drainage of the hinged type vehicle through channel. And materials can be saved.

The invention relates to the technical field of oil delivery pumps, in particular to a pressure-adjustable oil delivery pump which comprises a piston pump, a base is arranged at the bottom of the piston pump, the piston pump is fixedly mounted on the base through a support, a connecting rod of the piston pump is rotationally connected with a first rotating shaft, and a supporting cylinder is fixedly mounted at the top of the base through a support. The flywheel is rotationally connected to the side, close to the first rotating shaft, of the supporting cylinder, a movable through groove is formed in the flywheel, a sliding rod is fixedly installed in the movable through groove, a pressure adjusting sliding block is arranged in the movable through groove and slidably connected with the sliding rod, and the end, away from the connecting rod, of the first rotating shaft is fixedly connected to the pressure adjusting sliding block. A pressure regulating unit is arranged on the side, away from the first rotating shaft, of the flywheel. The pressure regulating unit is designed, the handle is rotated to enable the pressure regulating rod to drive the pressure moving rod to push or stretch, the pressure rotating sliding block moves in the inclined through groove to enable the moving rod to drive the pressure regulating sliding block to move so as to change the reciprocating motion amplitude of the piston, and the pressure regulating function of the oil delivery pump is achieved.

The application discloses a kind of high-strength wear-resistant nanometer composite fiber fabric and preparation method thereof, it is related to textile fabric technical field, after pretreatment, polyvinylpyrrolidone is dissolved in the mixed solution of deionized water and dimethylformamide with volume ratio of 7:3, after adding modified silicon dioxide and modified titanium dioxide, polyacrylonitrile is dissolved in dimethylformamide and added into premix solution drop by drop, complete spinning solution preparation after stirring and ultrasonic treatment, then the spinning solution is pretreated and added into syringe, and fiber fabric is prepared by electrospinning.The application is designed to have titanium dioxide and silicon dioxide modified, and then added into polyvinylpyrrolidone solution before adding polyacrylonitrile, which realizes the function of uniform dispersion of nanoparticles, solves the problems of nanoparticle agglomeration, interface bonding failure and solvent polarity mismatch, can make nanoparticles uniformly dispersed, eliminates stress concentration point, and improves the interface bonding strength of nanoparticles and matrix.

The present application discloses a preparation method of a bimetallic composite plate by a Bridgman method, wherein the bimetallic composite plate is composed of a metal substrate and a cladding plate, wherein the cladding plate is obtained by sintering after granulating metal powder, and the steps include: (1) the metal substrate is corrected and leveled, and the top surface is sequentially rusted, degreased and roughened, and cleaned for use; (2) the metal powder is mixed and granulated, poured on the top surface of the metal substrate, and smoothed after vibration; (3) the metal substrate with the top surface covered with metal mixed particles is horizontally sent into a regional sintering furnace, inert gas protection is introduced, and heated to the liquefaction sintering temperature of the metal particles, the temperature zone width is 10-50cm, and the regional high temperature is gradually passed at a speed of 30-200cm / h to complete sintering; (4) cooling gas is blown to the metal substrate at the bottom of the regional sintering furnace outlet, and the bimetallic composite plate is obtained after the other side is naturally cooled. The method sets the regional temperature control and cooling crystallization mode for the preparation of the bimetallic plate, so that the bimetallic composite plate has high density, strength and material consistency.

The application provides a refractory compression resistance detection device and method, and relates to the technical field of refractory detection. The detection device comprises a detection box body and an internal positioning assembly, a first heating assembly, a pressurizing assembly and a data acquisition assembly. The positioning assembly supports both ends of the sample to achieve suspended positioning through two positioning blocks. The heating assembly comprises a first heating device that can be lifted and is in contact with the surface of the sample to heat. The pressurizing rod of the pressurizing assembly vertically penetrates the heating device to press the center of the sample. The data acquisition assembly monitors the pressure, temperature and deformation in real time. The device realizes synchronous thermal loading through the cooperative work of the heating and pressurizing assemblies, avoids the thermal history interference problem caused by the separation of heating and pressurizing in the traditional method, can truly simulate the service state of the refractory in the high-temperature industrial environment, and provides accurate data support for the high-temperature compression resistance evaluation.

This application provides a method for the efficient recovery of vildagliptin from vildagliptin mother liquor, belonging to the field of medicinal chemistry technology. Using vildagliptin mother liquor containing disubstituted impurities as the treatment target, an N-dealkylation reaction is used to selectively remove additional alkyl substituents from the disubstituted impurities, directionally converting the impurities into the target product vildagliptin, thus achieving waste resource utilization. This application requires no complex equipment, uses mild reaction conditions, achieves a disubstituted impurity conversion rate ≥90%, increases the total vildagliptin yield by 5-8%, and does not generate new process impurities. Hydrogen peroxide, as a commonly used industrial oxidant, is inexpensive, and the only byproduct is water, significantly reducing environmental pressure. It is fully compatible with existing industrial production processes and has outstanding economic value and environmental significance.

The utility model relates to the field of robots, in particular to a trundle assembly and a self-walking robot, the trundle assembly comprises a supporting frame and a moving wheel set, the supporting frame is connected with a transmission shaft, and the transmission shaft can drive the supporting frame to freely rotate in the horizontal plane; the moving wheel set comprises main wheels and auxiliary wheels, the main wheels and the auxiliary wheels are arranged on the supporting frame in a rolling mode, and the main wheels and the auxiliary wheels are distributed in the advancing direction of the moving wheel set at intervals; at least one part of the main wheel in the width direction of the main wheel is concaved inwards in the radial direction to form a receding space, the auxiliary wheel is partially located in the receding space, the at least one part of the main wheel in the width direction of the main wheel is concaved inwards in the radial direction to form the receding space, and therefore the grinding force of the trundle assembly on a supporting face below the trundle assembly is reduced. And the damage to the supporting surface is reduced.

The application provides a joint soft tissue balancing method and device, electronic equipment and storage medium, relates to the technical field of medical instruments, and comprises the following steps: fusing joint internal pressure data and joint pose data, establishing the correlation between joint contact force and joint space attitude; based on the joint gap displacement data collected during the operation of the patient and the corresponding joint contact force response data, a soft tissue stiffness model is constructed; based on the soft tissue stiffness model, the joint gap data, and the joint gap change amount, the joint contact force prediction value of the candidate prosthesis specification combination is determined; an optimization function is constructed, each specification combination of the candidate prosthesis is traversed, and the specification combination corresponding to the optimal value of the optimization function is taken as a recommended configuration scheme. The method and device provided by the application construct an intelligent closed-loop solution of "measurement-modeling-prediction-optimization" driven by data as a whole, and realize accurate, efficient and personalized joint soft tissue balancing.

The invention provides a multichannel parallel forced flow cooling loop of a superconducting energy storage magnet solenoid coil, which belongs to the technical field of superconducting magnets and comprises a double-layer vacuum helium input pipe, a cooling pipeline inlet assembly, a solenoid coil assembly, a cooling pipeline outlet assembly and a double-layer vacuum helium output pipe. The double-layer vacuum helium input pipe and the double-layer vacuum helium output pipe are used for conveying low-temperature helium to the superconducting energy storage magnet part and outputting the helium after cooling is finished; the cooling pipeline inlet assembly provides helium input for the superconducting energy storage magnet; the solenoid coil assembly balances the inlet and outlet pressure and flow velocity of helium; the cooling pipeline outlet assembly outputs helium after cooling of the superconducting magnet is finished, the helium is sent back to the double-vacuum helium output pipe, and circulation of the superconducting magnet cooling medium is formed. According to the invention, the low-temperature environment when the superconducting coil normally works can be ensured, the good cooling capability of the superconducting energy storage magnet is realized, and the operation parameters of the cooling medium are controlled according to the specific working condition and the actual requirement.

The utility model discloses an anti-blocking type efficient fluidized bed water treatment hardness removal device which comprises a reactor body, the reactor body is composed of a lower shell and an upper shell, a lower inner wall barrel and a lower center reaction inner barrel are arranged in the lower shell from the inner wall to the center, an annular overflow weir is arranged on the inner wall of the upper shell, and a lower inner wall barrel and a lower center reaction inner barrel are arranged in the lower shell. An upper-layer mud bucket is arranged between an upper-end cylinder opening of the lower inner wall cylinder and an upper-end opening part of the lower shell, a water inlet distributor is arranged in the center of the bottom of the lower shell, and a lower-layer mud bucket which extends to the edge of the outer side wall of the water inlet distributor and shrinks is arranged at the lower end of the lower inner wall cylinder; the lower port part of the lower central reaction inner cylinder is provided with a horn-shaped cylinder extending to the inner side wall of the lower-layer mud bucket; and the side wall of the lower end of the lower shell is respectively provided with a water inlet pipe, a mud discharge header pipe, a dosing pipe and a bottom reserved pipe which extend into the lower-layer mud bucket. The device has the characteristics of good fluidization effect, wide application range, high treatment efficiency, easiness in maintenance, difficulty in blockage and simplicity in maintenance.

The invention relates to the technical field of material performance testing, and discloses a testing method for evaluating the chemical solvent permeation resistance of reinforced plastics, which comprises the following steps: constructing an inverse transfer function to compensate platform lag, and predicting the starting time of microcrack opening in the next period by using historical strain data, the method comprises the following steps: calculating an instruction sending moment by combining inherent delay of a platform, adaptively adjusting an optimal disturbance frequency based on a stiffness attenuation rate calculated in real time, generating a correction disturbance instruction by using an inverse transfer function, performing superposition injection, and deducting pre-calibrated fluid viscous damping work from single-cycle data to obtain effective dissipation density. And determining a failure end point based on the second derivative change of the effective dissipation density sequence. According to the method, the time synchronization of pressure waves and crack opening is realized through a prediction feedforward strategy, the deep penetration driving force is maintained by utilizing self-adaptive disturbance, the fluid damping interference is eliminated through an energy decoupling mechanism, and the authenticity and the result accuracy of the stress-assisted solvent penetration test are improved.

A pressure compensation electric actuating mechanism for a ship deep-sea high-pressure valve comprises a shell, a motor, an output shaft assembly, a worm assembly, a compensation assembly and a multi-stage gear assembly, and the multi-stage gear assembly comprises a first-stage pinion, a fourth-stage large gear and a multi-stage duplicate gear assembly arranged between the first-stage pinion and the fourth-stage large gear; the vertically-arranged output shaft assembly is located in the middle, the horizontally-arranged motor is arranged on one side of the output shaft assembly, and the horizontally-arranged worm assembly is arranged on the other side of the output shaft assembly. An inner cavity of the shell is divided into a first containing cavity and a second containing cavity through a bearing mounting plate, the first containing cavity comprises a motor containing cavity used for containing a motor, the portion, outside the motor containing cavity, of the first containing cavity contains a worm assembly and an output shaft assembly, and a multi-stage duplicate gear assembly is contained in the middle of the second containing cavity. An output shaft of the motor extending into the second containing cavity on one side of the multi-stage duplicate gear assembly is fixedly connected with the first-stage pinion. The invention has the advantages of light weight, small volume, low fault rate, high precision, fast response and high reliability.

The invention provides a fault identification method and device. The method comprises the following steps: acquiring N interfaces of user equipment; acquiring at least one flow monitoring value of each interface in the N interfaces within a first preset duration; for each interface in the N interfaces, if at least one flow monitoring value of the interface comprises a first flow monitoring value or a second flow monitoring value, determining that the interface has a fault, and recording a fault change table item corresponding to the interface; the first flow monitoring value is larger than a first preset maximum flow monitoring value corresponding to the interface, and the second flow monitoring value is smaller than a first preset minimum flow monitoring value corresponding to the interface. Therefore, by monitoring the N interfaces in the user equipment and periodically acquiring and storing the traffic, periodic fault judgment based on the traffic monitoring value is realized, the problems that fault recognition stays on a control surface and a large number of omission scenes exist can be solved, the monitoring pressure is relieved, and the fault recognition efficiency is improved. The problems that network faults are difficult to position and field data are difficult to retain are solved.

The invention relates to the field of printed circuit board manufacturing, in particular to printed circuit board film coating equipment. Specifically, the film laminating device comprises a film laminating assembly, the film laminating assembly is arranged on the upper side of a conveying belt and used for laminating a printed circuit board on the conveying belt, the film laminating assembly further comprises a film pressing assembly, the film pressing assembly comprises an air blowing sliding block arranged on an X-axis driving mechanism in a sliding mode, and an air blowing groove is formed in the lower end of the air blowing sliding block; the blowing grooves are perpendicular to the conveying direction of the conveying belt. According to the scheme, the covering film is pressed in a pneumatic mode, so that the equipment can press the covering film on the printed circuit board more softly and uniformly, and compared with a traditional roller pressing mode, the risk that the printed circuit board is damaged is remarkably reduced. Not only is the problem of non-uniform pressure or local overlarge pressure solved, but also the quality and the stability of film covering are improved.