237 results about "Experimental testing" patented technology

The invention discloses a pressure reconstruction method and system based on error correction and an adaptive grid, and a storage medium. The system comprises a PIV experiment test subsystem, a processing module (comprising a PIV post-processing unit and a pressure reconstruction unit) and the like. The method comprises the following steps: firstly, controlling a laser emitting sheet to irradiate tracer particles in a water tank through a synchronizer, and simultaneously triggering a high-speed camera to capture a particle image sequence at a microsecond-to-millisecond-level time interval; the PIV post-processing unit performs cross-correlation analysis on the image to generate a gridding velocity field; a pressure reconstruction unit solves a pressure Poisson equation based on the velocity field to obtain a preliminary pressure field, then iteratively corrects an error through an error correction mechanism and gradient correlation optimization, and triggers self-adaptive mesh refinement / coarsening according to a pressure / velocity gradient amplitude; and finally, outputting a high-precision pressure field on the optimized grid. The method can be applied to flow field tests and hydrodynamic performance analysis in ship and ocean engineering, especially pressure field reconstruction in a complex flow field, and has a wide application prospect.

The invention provides a multi-objective structure optimization method and system suitable for a wheel excavator. Comprising the steps that a three-dimensional model which has the same actual size as an experimental test prototype of the wheel excavator and comprises a cab, an upper frame and other related parts is established; and comparing frequency domain response curve results obtained by experimental tests and verifying the accuracy of vibration performance prediction of the finite element model. Sensitivity analysis is carried out, and parts finally used for follow-up multi-target optimization are screened out according to the influence degree on the performance of the multiple targets; and performing test design according to the screened parts to obtain sample points, and importing the sample points into a finite element model for simulation to obtain a sample response data set. And fitting the agent model according to the sample data, optimizing by using a genetic algorithm to obtain an optimal solution, and sorting according to the magnitude of an acceleration root mean square value to select an optimal scheme. And importing the optimal scheme obtained according to the steps into a finite element model, and comparing the optimal scheme with an original scheme to verify the rationality of a new optimization scheme.

A carbonate rock rough slit acid liquid mass transfer coefficient calculation method comprises the following steps: 1) setting conditions based on carbonate rock rough morphology, and constructing a diffusion boundary layer thickness equation under the rough morphology conditions; and 2) solving to obtain the thickness of the diffusion boundary layer, and calculating the mass transfer coefficient according to the relational expression between the thickness of the diffusion boundary layer and the mass transfer coefficient. The carbonate rock rough slit acid liquid mass transfer coefficient calculation method is provided by considering rough morphology influence, no slippage of the acid liquid and filtration loss, and compared with a plane assumption condition in the prior art, the method is more consistent with a real condition, and the coincidence degree with an experimental test result is higher.

The invention relates to the technical field of aircraft aerodynamic analysis, and discloses an aircraft full envelope aerodynamic database intelligent generation method and system, and the method comprises the steps: obtaining the aerodynamic coefficients of an aircraft under different combination conditions through simulation, constructing an aerodynamic coefficient control derivative matrix of the aircraft under the corresponding combination conditions, a continuous derivative matrix is generated through three-dimensional grid interpolation, and aircraft full envelope control derivative matrix coverage is achieved; and performing global correction on the continuous derivative matrix through a method of combining experimental testing and simulation analysis. According to the method, CFD simulation and deep fusion of test data can be realized, and the prediction accuracy and reliability of the pneumatic database are improved; the method can ensure that the generated aircraft full envelope pneumatic database can reflect the pneumatic characteristics of the aircraft more truly, has the characteristics of high efficiency and accuracy, and can greatly improve the efficiency and accuracy of aircraft control law design.

The invention discloses a shafting vibration characteristic analysis method and system based on elastohydrodynamic lubrication, and relates to the technical field of mechanical engineering.The method comprises the steps that the entrainment speed, the time-varying curvature radius and the contact load at a contact point in a gas distribution-oil supply cam pair are determined; respectively inputting the entrainment speed, the time-varying curvature radius and the contact load at the contact point into a friction analysis model in an elastohydrodynamic lubrication state, and calculating a time-varying curve of the total interfacial friction force of the gas distribution-oil supply cam pair in the whole working cycle; based on time-varying friction excitation corresponding to any moment in the change curve, determining a system excitation vector of the gas distribution-oil supply cam pair by using interface friction as a key connection quantity through experimental testing and simulation modeling technologies; according to the system excitation vector and the structure parameters of the camshaft system, establishing a camshaft system torsional vibration characteristic coupling analysis model considering the interface elastohydrodynamic state; and solving the shaft system torsional vibration differential equation set to obtain the influence rule of the time-varying friction on the instantaneous vibration characteristics of the camshaft system.

The invention belongs to the technical field of oil well pipe column experimental testing, and discloses an oil well pipe column anti-extrusion strength experimental device and an oil well pipe column anti-extrusion strength experimental method. The oil well tubular column anti-extrusion strength experimental device comprises an extrusion testing mechanism, an external pressure loading mechanism, an internal pressure loading mechanism, a sensing assembly, a heating mechanism and a cooling mechanism. The sleeve sample is arranged in the extrusion testing mechanism in a penetrating manner, and the external pressure loading mechanism provides an external pressure substance for the extrusion testing mechanism. The internal pressure loading mechanism is connected to the interior of the casing sample and can circulate internal pressure substances in the casing sample. The sensing assembly comprises a plurality of sensors which are arranged at intervals in the circumferential direction and the axial direction of the casing pipe sample and can detect strain and pressure of the corresponding position of the casing pipe sample. The heating mechanism is arranged in the extrusion testing mechanism and is used for heating the sleeve sample; and the cooling mechanism is positioned at the downstream of the sleeve sample and can cool the internal pressure substance flowing out of the sleeve sample. The oil well pipe column anti-extrusion strength experimental device can simulate the actual stratum environment, and the accuracy and comprehensiveness of experimental data acquisition are improved.

The invention provides a forecasting system and method for forecasting underwater radiation noise after ship equipment replacement. The system comprises a data acquisition module, a data processing module and a noise forecasting module, and the data acquisition module acquires various related data before and after equipment replacement to provide comprehensive support for subsequent calculation; the data processing module performs a series of calculation processing on the acquired data to ensure that the data is accurate and available; the ship underwater radiation noise prediction system is compact and reasonable in structure, and the existing technical problems can be effectively solved. According to the method, through the steps of experimental testing before equipment replacement, transfer function construction, acceleration admittance matrix acquisition and the like, the influence of various factors on noise after equipment replacement is comprehensively considered, and specific operations of each step, such as construction of a base-underwater noise transfer function, construction of an equipment-base transfer function and the like, are explained in details, so that the noise level can be accurately forecasted, and the noise level can be accurately predicted. And powerful support is provided for making a ship equipment replacement scheme.

The utility model relates to the technical field of integrated circuit testing, and particularly discloses an integrated circuit experiment testing device which comprises a shell. A microcontroller, and a digital oscilloscope, a function generator, a digital logic analyzer, a pattern generator, a virtual digital I / O interface, a front PCB panel and a plurality of test interfaces which are electrically connected with the microcontroller are arranged in the shell; the front end of the shell is provided with a voltage acquisition interface, a current acquisition interface, a display screen and a plurality of voltage output ports which are electrically connected with the front PCB panel, the bottom of the shell is provided with an air inlet, a cooling fan is arranged above the air inlet, and the middle part of the shell is provided with a middle air outlet. According to the utility model, a plurality of instruments and meters are integrated to carry out experimental testing, so that the device is convenient to operate and overhaul, smaller in size and small in occupied space, meets the requirement of carrying out rapid testing in a limited space, and is suitable for design, simulation, manufacturing and testing of integrated circuits and related experimental teaching and scientific research activities.

The invention aims to provide a gas turbine blade unstable flow visualization testing method, and belongs to the technical field of gas turbine experimental testing. Comprising the following steps: inputting boundary conditions and geometric conditions of a calculation model; numerical simulation flow field data under the condition are obtained through CFD calculation; if yes, the next step is carried out, and if not, a higher-quality grid is generated and returned to the encrypted grid, and CFD numerical simulation calculation is carried out again; selecting a proper resolution ratio based on an actual demand; generating a data source quantity and obtaining CFD calculation data according to the data source quantity; and outputting the three-dimensional transient visual flow field at the moment obtained by the checked high-precision CFD numerical simulation. The actual working condition of the gas turbine blade can be simulated, the test error of an actual instrument under the severe working condition is avoided, and the test difficulty is reduced. The precision of CFD numerical simulation is optimized, and the error is reduced, so that the credibility of the three-dimensional visualization cloud picture is improved.

The invention provides an FC network switch simplified test method, which relates to the technical field of aviation systems, and comprises the following steps: S1, constructing a test environment, inserting a first FC switch and a second FC switch into a test tool, and interconnecting a plurality of ports of the first FC switch and the second FC switch; s2, controlling the first FC switch and the second FC switch to start and operate in a ground working mode through an external discrete magnitude, and setting domain IDs of the two switches to be 1; and S3, controlling the CPUs of the first FC switch and the second FC switch to inject an FC excitation source through software, so that the first FC switch and the second FC switch mutually send and receive FC test messages through interconnected ports to execute an automatic test. According to the method, the problem of test environment conflict frequently existing in actual scientific research test and experimental test is solved, the progress of production delivery, scientific research and troubleshooting is accelerated, and a reference basis is provided for development and test of similar products.

The invention provides a multi-physics-field coupled core particle microchannel boiling heat exchange experiment testing device and testing method, and belongs to the field of boiling heat exchange experiment testing devices. According to the invention, a laser thermal control module, a reflection temperature measurement module, a particle velocity measurement module, a three-dimensional micro-control module, a stress test module, a sound field test module and an electric field test module are creatively integrated, and flexible combination and active control of each physical field are realized through standardized interfaces. Local point heating is achieved through pulse laser, non-contact transient surface temperature analysis is achieved through a heat reflection method, a micro-nano scale phase change flow field is analyzed through a PIV system, local thermal stress is measured through an embedded film strain gauge set, and automatic alignment and cooperative measurement of all modules are achieved in combination with a high-precision piezoelectric displacement table. Through modular design and system integration, accurate coupling and cooperative measurement of multiple physical fields of light, sound, heat, force and flow on the core particle scale are realized.

The application discloses a kind of methods for evaluating the delamination fracture performance of wind power blade sandwich structure, it is related to blade sandwich structure experiment and simulation field, S1: prefabricated crack sample preparation;S2: sample processing;S3: experimental test;S4: theoretical analysis;S5: simulation modeling;S6: simulation model verification;S7: interface delamination backtracking analysis;The application can accurately obtain the delamination fracture material parameters of wind power blade sandwich structure, analyze the delamination failure load of sandwich structure by simulation model, obtain interface damage, crack propagation and other information of sandwich structure, and quantitatively evaluate the resistance of blade sandwich structure to delamination crack propagation.

The application discloses a kind of high temperature high pressure cylinder sample deformation measuring devices and methods in limited space, belong to rock mechanics experimental testing technical field, solve the sensor adaptability of existing HPHT triaxial test equipment, constrain triaxial chamber volume and the problem of high cost.The rigid measuring rod of traditional LVDT is replaced by inelastic flexible wire in the application, the volume is reduced, so that the triaxial chamber can be more miniaturized, and the first displacement sensor and the second displacement sensor are built-in in the triaxial chamber base, not only need to occupy the internal space of triaxial chamber, so that the triaxial chamber can be designed more compact, reduce the amount of confining pressure oil medium, shorten the temperature rising time, and avoid direct exposure to high temperature and high pressure environment, significantly improve its reliability in high temperature and high pressure environment, while using displacement sensor combined with inelastic flexible wire mechanical transmission scheme to replace imported special sensor, and reduce the cost.

This invention relates to the field of R&D management technology and discloses a client-based experimental testing method, apparatus, device, and medium, comprising: obtaining the current experiment's strategy configuration in response to a page or component initialization event, or in response to a server-side instruction pushed via a long connection; calculating the current user's experiment group information based on the user identifier and the current experiment's strategy configuration, and writing it to a local storage area; dynamically replacing the original interface or logic configuration according to the replacement rules in the current experiment's strategy configuration to generate an experiment version configuration; executing interface rendering or business logic based on the experiment version configuration; and when a tracking event is triggered, reading the experiment group information from the local storage area and appending it to the tracking data. This invention can be applied to business scenarios such as fintech and healthcare, helping users ensure experimental data consistency and improve A / B testing efficiency through real-time strategy acquisition, dynamic configuration rendering, and automatic tracking marking.

The invention provides a variable working condition electromagnetic noise characteristic analysis method for a vehicle high-speed permanent magnet synchronous driving motor, which is used for designing a simulation analysis and experiment test sequence based on a multi-accelerator load working condition, and carrying out simulation and entity system test in a full rotating speed range aiming at a harsh noise order generated in the operation of the high-speed motor. The noise sound pressure level under the corresponding load working condition and the change rule of the noise sound pressure level along with the load working condition and the rotating speed can be effectively extracted according to results obtained through simulation and testing. An analysis result obtained on the basis of the method can be used for NVH performance optimization design of the electric driving system of the electric vehicle, and therefore the requirements of the vehicle in actual operation can be better met.

The invention provides an aircraft cabin explosion cutting safety equivalent experiment test method and system, and the method comprises the steps: carrying out the single-factor simulation test of all structural parts in a cabin based on a preset three-dimensional model, and determining the feature index and influence coefficient of each structural part; according to the characteristic indexes and the influence coefficients, screening each structural component in sequence to determine a target component, performing parameter mapping to determine a plurality of target simulation modules, and determining a target experiment cabin according to the target simulation modules; placing a preset dummy in the target experiment cabin, and determining sensor distribution on the dummy and the target experiment cabin based on a preset rule to perform an explosion experiment; data processing is carried out based on experimental parameters collected by a sensor, and the relevance between the structural response characteristics and the personnel injury characteristics is determined through a preset model so as to evaluate and optimize the cabin. The problem that a systematic, reliable, economical and feasible test method is lacked in the prior art is solved.

The invention discloses a testing device for measuring the adsorption or desorption amount in coal and the strain law of a coal body, and relates to the technical field of coal and coal bed gas development, and the key point of the technical scheme is that the testing device comprises a gas steel cylinder, a constant-temperature box, a plurality of groups of experimental testing equipment and a data detection system, and the experimental testing equipment is located in the constant-temperature box; the output end of the gas steel cylinder is connected with a gas injection hose, the gas injection hose is communicated with experimental testing equipment, the experimental testing equipment comprises a reference cylinder and a sample cylinder, pressure sensors are mounted on a top cover of the reference cylinder and the side surface of the sample cylinder, the sensors are hermetically connected with the interior of the steel cylinder, and the pressure sensors are connected with a data monitoring system through acquisition lines. A cylindrical coal sample attached with a strain gauge is placed in the sample cylinder, and the data monitoring system is connected with the strain gauge through an acquisition line. According to the invention, the influence of different gas types, different temperatures and adsorption quantities on the adsorption deformation of the coal body can be tested, and the strain rule of adsorption / desorption of gas in coal under the influence of multiple factors can be conveniently researched.

The application discloses a kind of floating photovoltaic array aerodynamic performance wind tunnel test platform and method, including platform main body, platform main body includes wind field simulation area and experimental test area;Wave simulation device is provided in the front section of the incoming flow direction in wind field simulation area;Floating photovoltaic array model and six degrees of freedom floating platform are provided in experimental test area;Floating photovoltaic array model is fixed on six degrees of freedom support platform of six degrees of freedom floating platform;Pitot tube is arranged in experimental test area, and pitot tube is installed on telescopic support.The application can simulate real complex wind field environment on sea and the multiple degrees of freedom change of floating photovoltaic array by the platform and method, and also can obtain the dynamic response data of photovoltaic panel under different working conditions Real-time measurement provides scientific basis for the design optimization and wind resistance performance improvement of offshore floating photovoltaic platform.

The invention discloses a rapid numerical prediction method for flow resistance of a shellfish trap, and relates to the field of flow resistance analysis of a nuclear power seawater cooling system. A filter screen explicit modeling or experimental testing mode is mostly adopted for flow resistance analysis of an existing shellfish catcher, and the problems that the calculation scale is large, the simulation period is long, the cost is high, or parameters depend on experience, and the engineering applicability is insufficient exist. On the basis of a porous medium equivalent modeling thought, on the premise that the porosity of the filter screen is kept consistent, a filter screen area is replaced with a porous medium area, only the viscous resistance effect in direct proportion to the flow velocity is introduced, and through pressure drop comparison of an explicit filter screen model and a porous medium model, iterative fitting is conducted on viscous resistance parameters, so that the filter screen porosity is calculated. And fitting parameters are applied to the integral model of the shellfish trap, so that rapid numerical calculation of the flow resistance characteristic is realized. The method is suitable for engineering design, operation analysis and flow resistance rapid evaluation of shellfish traps and similar high-porosity filtering structures in a seawater cooling system of a nuclear power station.

The invention relates to the technical field of building noise control, and discloses a building noise control method based on sound absorption cavity design, which comprises the following steps: arranging a plurality of sound absorption cavities in a concrete truss, filling a porous sound absorption material in the cavities, covering a micro-perforated plate, and optimizing the noise reduction effect by adjusting the geometric dimensions and the arrangement mode of the cavities. According to the method, the internal space of the concrete truss can be fully utilized, the design parameters are optimized in combination with experimental testing and numerical simulation, low-frequency noise propagation is effectively inhibited, and the additional burden on a building structure is relieved. The sound absorption cavity is formed in the inner space of the concrete truss, and the porous sound absorption material and the micro-perforated plate are combined, so that the inner space of the concrete truss is fully utilized, and the additional burden of a traditional sound insulation measure on a building structure is avoided; the geometric dimension and the arrangement mode of the sound absorption cavities can be flexibly adjusted according to the building floor height and the noise frequency characteristic, and therefore the low-frequency noise suppression capacity is improved.

The application discloses a reservoir sensitive parameter determination method, device and equipment and a storage medium. The method comprises the following steps: obtaining a plurality of core samples of a target layer in an exploration area, wherein each core sample corresponds to different porosities; performing rock physical parameter experimental tests on each core sample under different saturations based on a seismic source with the same frequency as a seismic wave, and obtaining the corresponding longitudinal wave velocity and transverse wave velocity of each test; determining the parameter value of each rock physical elastic parameter corresponding to each test based on the corresponding longitudinal wave velocity and transverse wave velocity of each test and core density information; and determining the reservoir sensitive parameter corresponding to the target layer from each rock physical elastic parameter based on the parameter value of each rock physical elastic parameter corresponding to each test. The technical scheme of the embodiment of the application can determine a more matched reservoir sensitive parameter, ensure the accuracy of the determination of the reservoir sensitive parameter, and effectively improve the seismic reservoir prediction precision.

The present invention relates to a control method and control apparatus for a permanent magnet synchronous motor. The control method comprises: a compensation measurement step, which comprises: by means of an experimental test performed in advance, measuring and calculating a plurality of cogging torques of a rotor at a plurality of rotation positions within a rotation cycle, and generating a lookup table that represents mapping relationships between the plurality of rotation positions and the corresponding plurality of cogging torques; and a compensation application step, which comprises when a permanent magnet synchronous motor is operating, on the basis of the lookup table generated in the compensation measurement step, determining a cogging torque corresponding to the current rotation position of the rotor, and applying a corresponding compensation signal to a control circuit of the permanent magnet synchronous motor. The control method and control apparatus in the present invention can improve the effect of cogging torque compensation.

The invention belongs to the technical field of ocean engineering experiments, and provides a fan type rapid identification method for maritime work laboratory motion measurement, which relates to a device comprising a camera for motion measurement, an image collector and a PC (Personal Computer). According to the method, superpixel analysis and optical flow analysis are adopted, K-means clustering is combined to obtain the area of the blade on the image, and in order to reduce the error rate of discrimination, the fan category is discriminated on the image according to the layout characteristics of the blade, and the fan category is judged again through the mutual relation of dynamic motion vectors. According to the method, the type of the floating fan model can be rapidly identified, the type of the measured target can be rapidly obtained at the beginning of motion measurement, the influence on the operation load in the motion measurement process is small, integration and intellectualization promotion of a whole fan experiment test system are facilitated, and the method has high practical value.

This invention relates to the field of battery energy storage system technology, specifically to a battery energy storage system lifespan prediction method, comprising the following steps: S1, conducting experimental tests on specific battery models for both cyclic and static usage scenarios, obtaining experimental test results, and acquiring real-time operational data of the energy storage power station; when in use, this invention combines experimental testing with a data-driven rapid battery lifespan estimation method, by statistically analyzing the daily operational data of the battery energy storage system; when calculating capacity decay, both cyclic decay and calendar decay are considered simultaneously to achieve rapid assessment and lifespan prediction of the battery's state of equilibrium (SOH); by using parallel calculation of daily operating conditions and all possible decay amounts, replacing the previous serial iterative calculation method, the algorithm efficiency is significantly improved; when data is missing, a missing value completion method is used to fill in the overall daily operating conditions, rather than directly interpolating to complete a specific variable, which helps improve the accuracy of the prediction.

The application discloses a kind of sealed dynamic performance experimental test platform, including environmental box, experimental sleeve, hydraulic oil pump, high-speed reciprocating device and leakage detection device, temperature control device I is equipped in environmental box and is equipped with base, temperature sensor probe is equipped in base, experimental sleeve includes left guide sleeve, shaft cylinder and right guide sleeve, between which are equipped with sealing, and coaxial through hole is opened in axial, aperture is slightly larger than experimental shaft, shaft cylinder and left guide sleeve, right guide sleeve are equipped with the sealing piece to be measured between, shaft cylinder is equipped with oil supply pipeline and oil return pipeline with base and is equipped with sealing, oil supply pipeline and oil return pipeline are all connected with the hydraulic oil pump of containing temperature control device II and communicate, left and right guide sleeve lower part are all with inverted funnel structure and middle part inclined notch.Real-time measurement leakage rate, realize the data measurement and performance evaluation of hydraulic reciprocating dynamic sealing.

The application provides a pig semen quality rapid analysis instrument and relates to the field of reproductive experiment test platforms. The pig semen quality rapid analysis instrument comprises a workbench, the one side of the tabletop of the workbench is provided with an up-down through-type placing groove, comprises an electric sliding component, is installed on the placing groove and can independently slide forward and backward, comprises a constant-temperature storage component, the electric sliding component can be linked to open the constant-temperature storage component when moving forward, comprises a convenient cleaning and sterilization component, is fixedly installed on the electric sliding component. The pig semen quality rapid analysis instrument can spray and disinfect the handheld sampling equipment, can perform immersion cleaning when heavy cleaning, both forms are relatively fast, especially the hand flushing disinfection and drying for reuse, improve the reuse efficiency of the semen sampling analysis instrument, and manual use of alcohol is not needed, the operator's hand does not leave the equipment all the time, the probability that the equipment is contaminated is greatly reduced, and therefore the experimental analysis result obtained is more accurate.

The invention relates to the technical field of flux component determination, in particular to a method for determining the content of calcium fluoride in flux for corrosion-resisting steel through ion chromatography. The invention discloses a method for measuring the content of calcium fluoride in welding flux for corrosion-resisting steel through ion chromatography. The method comprises the following steps: S100, preparing a sample to be measured; s200, pretreating a to-be-detected sample, and preparing a diluted filtrate; s300, setting working parameters of the ion chromatograph; s400, calibrating an instrument, and determining by adopting an ion chromatograph; and S500, measuring the calcium fluoride content of the to-be-measured sample. The method for determining the content of calcium fluoride in the flux for corrosion-resisting steel through ion chromatography has the advantage that the welding quality is guaranteed. And the welding flux does not need to be subjected to experimental detection before welding, so that the welding flux is saved.

According to the method for predicting the dynamic breakthrough pressure of the gas storage provided by the embodiment of the invention, the breakthrough pressure of one cover rock core is tested, so that the breakthrough pressure of the gas storage under different operation pressure conditions can be quickly obtained. The embodiment of the invention has the advantages of more accurate breakthrough pressure prediction result, rapid calculation, small experimental test workload and the like, is suitable for scenes of rapid evaluation of working conditions of the breakthrough pressure of geologic body cap strata of gas reservoirs, gas reservoirs, oil reservoirs and the like, and fills the industry blank of rapid acquisition of the dynamic breakthrough pressure field of the cap strata.

The application discloses an experimental testing device and a testing method suitable for high-temperature lead-bismuth erosion, and belongs to the technical field of nuclear energy experimental testing devices. The device comprises a variable frequency motor, a motor support, a main shaft, a stuffing box, a shaft seat, a flange cover, a tank body, a mounting base, a test piece disc and a medium rotation prevention device. The output shaft of the variable frequency motor penetrates through the top cover of the motor support, the upper end of the main shaft is connected with the output shaft of the variable frequency motor through an elastic column pin coupling, and the stuffing box and the shaft seat are sleeved on the outside of the main shaft. The lower part of the motor support is detachably connected with the shaft seat, the shaft seat is detachably connected with the top of the flange cover, the flange cover is detachably connected with the top of the tank body, and the tank body is welded on the mounting base. The lower end of the main shaft extends into the tank body, and three test piece discs are arranged at equal intervals in the tank body, and test pieces are detachably installed on the test piece discs. The medium rotation prevention device is embedded in the tank body. The top edge of the tank body is connected with a protective gas inlet and a protective gas outlet, and the bottom is provided with a lead-bismuth medium inlet and outlet.