196 results about "Accelerated aging" patented technology

The invention relates to the technical field of semiconductor photoelectronics, and discloses a multi-physics field coupling silicon-based optical interconnection chip degradation model construction method and application, and the method comprises the steps: firstly constructing a multi-physics field coupling analysis model, and quantitatively representing the coupling relation of thermodynamics, optics, electricity and material aging through an inter-field coupling equation and a material aging dynamic model; simulating field distribution of a chip key area under multi-environment stress through finite element analysis, and extracting data; then historical degradation data is collected by combining an accelerated aging test and long-term operation monitoring, and a degradation parameter prediction model is established after data processing based on machine learning; and finally, inputting a finite element result and a prediction result into a material aging dynamic model, and finally forming a multi-physics field coupling degradation model. The problems that the prior art depends on a single physical field, degradation mechanism analysis is incomplete, and service life evaluation is inaccurate are solved, and support can be provided for reliability evaluation, structure optimization and service life prediction of the silicon-based optical interconnection chip.

The invention discloses a panel vertical seam water stop structure repair effect evaluation method, which comprises the following steps of: firstly, synchronously obtaining surface crack and internal defect data through cooperative detection of infrared thermal imaging and ultrasonic flaw detection; and carrying out space alignment on point cloud data generated by three-dimensional laser scanning and an ultrasonic detection result, and establishing a BIM model containing a crack three-dimensional form. A practical engineering environment is simulated in a laboratory to carry out material accelerated aging and test key indexes such as an elastic recovery rate, a base surface state is evaluated through a temperature and humidity sensor array in a construction stage, a six-axis grouting robot is adopted to execute accurate filling, a curing process is monitored by a synchronous pre-embedded optical fiber sensor, and after aging is simulated by combining a hydraulic test with climate, a construction period is shortened. A distributed optical fiber network is used for continuously collecting deformation data, a comprehensive evaluation model is constructed based on mechanics, durability and sealing indexes, and finally material selection and process parameters are optimized through machine learning.

The invention discloses a sealing structure for a test, and an aging test and leakage rate detection method and system. The sealing structure comprises a tested sealing assembly and an air cavity assembly integrated in the tested sealing assembly, and serialized test samples with different filling rates and compression rates are formed by regulating and controlling the groove width and the groove depth of a sealing ring mounting groove so as to simulate various actual sealing states. An aging test adopts a multi-factor coupling accelerated aging method, and a plurality of material characterization means are combined to systematically evaluate the evolution rule of the sealing performance. According to leakage rate detection, static pressure maintaining and dynamic pressure adjusting dual-mode measurement is achieved through an air tightness detector, and the sealing characteristics under different pressure conditions are comprehensively reflected. According to the invention, direct and systematic detection of the leakage rate of the sealing structure is realized, and an innovative solution is provided for sealing performance evaluation and service life prediction of electrical equipment.

The application relates to the technical field of material testing, and relates to a high polymer material testing method and system based on image analysis, which comprises the following steps: collecting images of high polymer materials to obtain high polymer material images, performing pretreatment operations to obtain pretreated material images, identifying a defect region set in the pretreated material images, performing feature extraction on the defect regions to obtain defect region parameters, comparing the defect region parameters with defect thresholds to obtain defect deviation values, judging the defect conditions of the defect regions, confirming the high polymer materials as preliminary qualified materials if all the defect conditions are acceptable defects, performing accelerated aging tests to obtain aging test materials, performing image detection on the aging test materials to obtain detected defect regions, comparing the defect regions with the detected defect regions to obtain defect region expansion values, and obtaining material detection results. The application can solve the problem of low testing result accuracy in the current high polymer material testing process.

The invention relates to the technical field of tire evaluation, in particular to a method for evaluating the aging loss performance of a rubber engineering tire. The method comprises the following steps: determining tire attributes according to a tire vulcanization process database; constructing a multi-environment composite accelerated aging oven based on the tire vulcanization process database; segmenting a tire sample according to the tire attribute, inputting the tire sample into the multi-environment composite accelerated aging oven, and simulating accelerated aging; sampling according to a preset time interval to obtain an aging simulation result; determining a performance attenuation curve of each tire sample according to the aging simulation result; inputting the performance attenuation curve into an Arrhenius equation, and determining key failure time; and determining the tire performance according to the key failure time and the tire attribute.

The invention provides a simulated aging test method for an antifouling coating. The simulated aging test method comprises the following steps: S1, constructing a natural aging performance model of the antifouling coating; s2, constructing an accelerated aging model of the antifouling coating and acquiring an acceleration ratio N of natural aging to accelerated aging; s3, based on an accelerated aging model, acquiring an acceleration period Mi corresponding to a critical threshold R (temporary i) of a copper ion exudation rate, wherein the predicted life Lp (temporary i) of the antifouling coating is equal to Mi * N; and S4, based on a natural aging model, obtaining a predicted copper ion exudation rate R < pre-i > corresponding to the predicted life Lp < pre->, judging whether R < pre-i >-R < critical i > / R < critical i > is less than or equal to 10%, if so, outputting a near threshold R < critical i > and the predicted life Lp < pre-i >, and if not, adjusting the critical threshold of the copper ion exudation rate to R < critical i + 1 > and returning to the step S3. According to the method, the performance failure threshold value of the antifouling coating is taken as a boundary condition, the performance of the antifouling coating is rapidly evaluated, the service life of the antifouling coating is quantitatively predicted, the prediction result is subjected to cooperative cross validation through linkage double models, and the reliability is improved.

The invention discloses a life health management method and system for an HR3C material, and relates to the technical field of data processing, and the method comprises the steps: collecting the operation condition data of the HR3C material in a service state, carrying out the creep, fatigue and creep-fatigue interaction performance testing of a welding seam and a heat affected zone, and obtaining the real-time service state data; combining a high-temperature accelerated aging test result to construct a structure-performance coupling model; and performing microscopic damage calculation and residual life prediction based on the organization-performance coupling model and the real-time service state data, and generating a health assessment index to execute health management. The technical problems that in the prior art, damage evolution of the HR3C material under the complex high-temperature working condition cannot be accurately evaluated in real time, and the service life prediction and health management precision is insufficient are solved, and the purposes that through performance coupling analysis and aging process feedback under the multiple working conditions, microcosmic damage is accurately evaluated, and the remaining service life is dynamically predicted are achieved. And the health management precision is improved.

The invention relates to an environmental test box for realizing high and low temperature rapid alternating circulation, which is mainly applied to the technical field of environmental test equipment. The test box is provided with a high-temperature chamber and a low-temperature chamber which are independent from each other, a thermal insulation layer is arranged between the two chambers, and the test box can respectively keep constant temperature environments at the highest temperature of + 75 DEG C and the lowest temperature of-50 DEG C; during a test, a sample is placed in the test bed, and the rotating shaft structure driven by the motor periodically rotates in a reciprocating manner or rotates in the same direction among different temperature zones, so that high-low temperature rapid alternating circulation is realized. The operation mode of the motor is controlled through the control system so as to simulate the accelerated aging process of the component in the temperature rapid alternating environment. According to the test box, through the design of the control system, the forced convection fan and the middle thermal insulation layer, it is guaranteed that the temperature switching process is rapid, uniform and stable. Compared with the prior art, high and low temperature circulation can be completed without overall heating and cooling of the interior of the test box, and the test box has the advantages of being high in test efficiency, capable of remarkably improving the reliability and accuracy of the high and low temperature alternating circulation test of the sample and the like.

The invention relates to the technical field of aging test, and discloses a laser chip accelerated aging test method, which comprises the following steps: synchronously measuring the optical power, the threshold current, the slope efficiency and the emergent wavelength of a laser chip in an accelerated aging environment to obtain a time sequence data matrix; performing double sparse dictionary decomposition on the time series data matrix to obtain a normal feature coefficient and a degradation feature coefficient; calculating a target characteristic value of the time-varying covariance matrix based on the degradation characteristic coefficient, and generating a dynamic characteristic value sequence and a corresponding degradation stage identifier according to the target characteristic value; and based on the degradation stage identifier, inputting the dynamic characteristic value sequence into a life prediction model for life prediction, and obtaining the remaining service life. The method can accurately capture the nonlinear characteristic and the time evolution mode of the laser chip degradation process, automatically identify the time period characteristic which contributes to life prediction, and improve the service life of the laser chip. And the accelerated aging test accuracy of the laser chip is improved.

The invention relates to a P91 pipeline aging prediction method, and belongs to the field of P91 pipeline aging prediction. The method comprises the following steps: acquiring a micro-magnetic signal (such as Barkhausen noise) of a P91 pipeline through a micro-magnetic detector, and extracting characteristic parameters related to an aging state; and inputting the parameters into a pre-trained aging grade prediction model, and directly outputting the aging grade (1-5 grade) of the pipeline. The prediction model is constructed based on a machine learning algorithm (such as ReliefF feature selection and a BP neural network), and training data comes from an accelerated aging sample which is simulated through specific heat treatment and has a clear microstructure (represented by EBSD) and macromechanical property correlation. According to the method, rapid, lossless and quantitative prediction of the aging state of the P91 pipeline is realized, and a reliable basis is provided for safety assessment and residual life prediction of the in-service pipeline.

The invention discloses an SBS (styrene butadiene styrene) modified asphalt aging performance evaluation method, a prediction model and application, relates to a construction method of an SBS modified asphalt aging performance evaluation and prediction model based on multi-scale aging evaluation indexes, and aims to solve the problems that aging evaluation depends on a single-scale index and the prediction precision is insufficient in the prior art. The model is verified by accelerated aging data in a laboratory, the thermo-oxidative aging error is less than or equal to 9.4%, and the ultraviolet aging error is less than or equal to 7.5%. Engineering application: providing road maintenance period suggestions (for example, when the aging time is predicted to be 5 years, detection is recommended once every two years); triggering a material replacement threshold value when the number of honeycomb structures drops to 60% of the initial value; the performance recovery is realized by compounding the new asphalt and the regenerant (the mixing amount is 10-15%). Through multi-scale index collaborative analysis and data modeling, the aging prediction precision is significantly improved, and a scientific basis is provided for asphalt material life evaluation and road maintenance decision.

The invention belongs to the field of polyester resins, and provides a weather-resistant polyester resin for low-temperature curing and a preparation method thereof. A three-step progressive design that a polyester prepolymer is terminated by silane and then is subjected to hydrolytic polycondensation with tetraethyl orthosilicate to construct an organic-inorganic covalent hybrid network is adopted; through cooperation of the condensation catalyst, the hindered amine light stabilizer and the ultraviolet absorbent, the mechanical properties that the pencil hardness reaches the HB level or above and the cross-cut test level is not higher than the first level under the low-temperature curing condition of not higher than 100 DEG C are achieved, and the long-term weather resistance that the color difference is not larger than 2.0 and the gloss retention rate is not lower than 80% after 500-hour artificial accelerated aging is achieved. The technical problems of poor storage stability and difficulty in consideration of high solid content and low viscosity caused by insufficient low-temperature curing capacity and non-uniform organic-inorganic hybridization of the traditional polyester resin are solved, and the polyester resin has wide application value in the fields of building coatings, automobile refinishing paints, wood coatings and the like with strict requirements on low-temperature curing and weather resistance.

The invention discloses a composite material storage life prediction method based on variable transformation and a genetic algorithm, and relates to the technical field of composite material performance evaluation and life prediction, and the method comprises the steps: obtaining performance degradation data at different temperatures through an accelerated aging test, and building a semi-empirical performance degradation model; specific variable transformation is introduced, a nonlinear optimization problem is converted into a linear regression problem, partial model parameters are rapidly solved by adopting a least square method, and meanwhile, key nonlinear parameters are globally optimized by using a genetic algorithm, so that the defect that a traditional method is easy to fall into local optimum is overcome. And establishing a temperature-service life relationship by combining with an archenius model, and realizing storage life prediction at normal temperature. The method also integrates sensitivity analysis and uncertainty quantification functions, and provides reliability evaluation for a prediction result. The method fully considers the influence of the environment temperature, meets the requirement of efficient prediction, and improves the precision and stability of life prediction.

The invention provides an optimization method for predicting the long-term welding reliability of a wire harness terminal and a conductor, and the method comprises the steps: collecting temperature and time data in a welding process, processing the data through a thermal simulation model, and obtaining the change trend of conductor lattice arrangement; according to the change trend of conductor lattice arrangement, the initial thickness and component distribution of oxide layer formation are obtained, and microstructure features of an oxide layer group are determined; aiming at the microstructure characteristics of the oxide layer group, simulating a long-term use environment by adopting an accelerated aging test to obtain a prediction curve of resistance increase; according to the quantitative model of the aging behavior, a performance evolution rule in the actual use environment is obtained, and the incidence relation between welding parameters and long-term reliability is determined; for a process scheme for improving the stability of a conductor, the resistance change of the conductor in a high-temperature environment is simulated and verified, and the accuracy of quantitative correlation is judged.

The invention discloses a current transformer signal compensation method and device, and belongs to the technical field of electric power measurement, and the method comprises the steps: carrying out the accelerated aging test of an unaged current transformer based on a benchmark reference parameter, and solving an environment calibration parameter and an aging calibration parameter; acquiring a real-time current output value, a real-time temperature, a real-time humidity and a data acquisition time point of the target current transformer; calculating an environment temperature and humidity compensation parameter based on the real-time temperature, the real-time humidity, the environment calibration parameter and the benchmark reference parameter; based on the aging calibration parameters and the data acquisition time points, mutual inductor aging compensation parameters are calculated; performing weighted integration on the environment temperature and humidity compensation parameter and the transformer aging compensation parameter to obtain a transformer signal compensation parameter; and compensating the real-time current output value based on the mutual inductor signal compensation parameter to obtain a current compensation value of the target current mutual inductor. By implementing the current transformer, the problem of low signal compensation accuracy of the current transformer in the prior art can be solved.

The invention discloses a submarine cable insulating material comprehensive aging evaluation method and system based on a time scaling equivalent axis, and relates to the technical field of submarine cable insulating material aging evaluation. The method aims at solving the problems that equivalent alignment of acceleration and natural aging data cannot be achieved, multi-index evaluation is contradictory, and the evaluation period is long in an existing method. The method comprises the following steps: acquiring a plurality of preset performance parameters of a submarine cable insulation material after an electric-thermal-force multi-physical field accelerated aging test, synthesizing a comprehensive aging index after homodromous mapping and robust standardization processing, establishing equivalent mapping of accelerated and natural service time through a linear scaling coefficient, and calculating the aging index of the submarine cable insulation material according to the equivalent mapping. And a service life evaluation result or reliability warning information is output after consistency checking. According to the technical scheme, the aging state and the service life of the submarine cable insulating material can be accurately and efficiently evaluated, and support is provided for material screening, service life evaluation and safety decision making of submarine cable engineering.

The invention discloses a transformer aging calculation and life prediction method, device, equipment and medium, and relates to the technical field of transformers, and the method comprises the following steps: S1, calculating an accelerated aging factor FAA of transformer insulation affected by temperature; s2, calculating the life loss of the transformer according to the accelerated aging factor FAA; s3, calculating the total life of the transformer according to the life loss of the transformer; s4, calculating the life loss rate of the transformer according to the total life of the transformer, and predicting the residual life of the transformer. A traditional insulation paper aging calculation and life prediction method is improved from two aspects of transformer equivalent accelerated aging factors and life prediction, influence factors of temperature are considered when insulation paper aging is calculated, and the accelerated aging factors are calculated according to hot spot temperature so as to calculate transformer insulation equivalent life loss. And calculating the total service life, the service life loss rate and the residual service life of the transformer.

The invention provides a thermogravimetric adsorption characterization method and system combining dynamic working condition simulation and an accelerated aging test, and belongs to the technical field of adsorbents. According to the method, the temperature and atmosphere time sequence of a thermogravimetric analyzer is controlled through programming, and initial performance evaluation and long-term service life prediction of the adsorbent are completed in a continuous experiment. The core innovation of the method is that on the basis of simulating the real industrial adsorption-desorption cycle, thermal stress and chemical stress are intelligently applied in the desorption stage, material aging is accelerated, attenuation data are fitted by using an index model, and the service life is scientifically predicted. The technical problems that a traditional method is single in characterization dimension, long in period and disjointed with actual working conditions are solved, and an efficient and reliable platform is provided for rapid and accurate evaluation of the adsorbent.

The accelerated aging testing machine comprises a box body, a PLC is fixedly installed on the right side of the outer surface of the box body, and an ultraviolet lamp is fixedly installed at the top of an inner cavity of the box body. A servo electric cylinder pushes a moving plate, a hollow rotating rod and a pressing frame to move, so that the pressing frame can synchronously press and fix a plurality of groups of film samples at the top of a supporting disc, and convenience is brought to operation of personnel; in the moving process of a moving plate, air in an air guide cylinder can be compressed through a fixing column, a pressure applying spring and a piston, and compressed air can be conveyed into an air guide cavity through a rotating connector, a hollow rotating rod, an air hole and a rotating sleeve by opening an electromagnetic valve, so that the air pressure in the air guide cavity is increased, and a rubber diaphragm is pushed to expand upwards; therefore, the actual use state can be simulated in the subsequent test period, and the accuracy of the aging test is improved.

The invention discloses a high-safety cable branch box in the technical field of cable branch boxes, which comprises a box body, a stepped bracket, a cable locking module and a synchronous adjusting module, and is characterized in that the stepped bracket comprises a plurality of groups of rotatably mounted frame plates arranged in the box body, and the top end of each group of frame plates is connected with a wiring copper bar through an insulating terminal; the front face of each set of frame plate is detachably connected with a sealing box corresponding to the wiring copper bar, the sealing box is fixedly connected with the frame plate at the front end of the sealing box or rotationally connected with the box body through a vertical plate, the cable locking module comprises a plurality of sets of fixed clamps installed on the sealing box, and a plurality of sets of movable clamps are rotationally installed between every two sets of vertically-corresponding fixed clamps. The cable branch box solves the problems of poor heat dissipation and inconvenient maintenance caused by cable accumulation in an existing cable branch box, accelerated aging of a cable insulation layer, shortened service life, increased short circuit and fire risk and the like.

The application provides a power equipment insulation life prediction and operation and maintenance project guidance method, device, equipment, medium and system. The method comprises the following steps: capturing a real-time leakage current time sequence signal of a power equipment; performing background noise stripping processing on the real-time leakage current time sequence signal to extract a target leakage current characteristic quantity; performing feature alignment processing on an accelerated aging index in an isolation test environment and the target leakage current characteristic quantity to establish an insulation degradation evolution benchmark of the power equipment, and then deducing a residual insulation time limit prediction value based on the insulation degradation evolution benchmark; analyzing and determining a matching spare part cycle parameter of the power equipment, and generating an operation and maintenance trigger instruction when confirming that the residual insulation time limit prediction value falls within a time window determined based on the matching spare part cycle parameter; and performing time sequence coordination arrangement processing on the matching spare part cycle parameter and a preset installation construction time cycle according to the operation and maintenance trigger instruction to generate corresponding operation and maintenance project guidance data packet output.

This invention belongs to the field of power engineering technology, specifically a cable connection device, including a housing; a fastening nut is threaded onto the outer surface of the housing; a compression ring is provided between the fastening nut and the housing; a cable body is provided inside the compression ring; the cable body includes a protective sleeve, a support ring, and a conductor. In this invention, the entire contact interface between the conductor and the connection substrate can be directly flushed and wetted by coolant, thereby completely solving the problem of localized overheating caused by incomplete coverage, ensuring the uniformity of temperature distribution at the connection point, and significantly improving connection safety and equipment reliability. Through the above-mentioned efficient and comprehensive cooling, the risk of accelerated aging of insulation materials, thermal breakdown, and short-circuit faults caused by overheating at the conductor connection point is fundamentally reduced. This not only ensures the immediate safety of the cable connection but also extends the service life of the connection device, providing a solid technical guarantee for the long-term stable operation of the entire power system.

The invention discloses a service life evaluation method for a flywheel energy storage motor under insulation square wave voltage and environmental stress. The service life evaluation method comprises the following steps: constructing an accelerated aging experiment platform comprising temperature control, air pressure control, a high-frequency and high-voltage square wave source, partial discharge detection and a breakdown protection circuit; multiple groups of accelerated aging tests are carried out on the motor insulation sample through a control variable method, and service life models under the square wave frequency, the rise time, the environment temperature and the air pressure single stress are obtained respectively; taking each single-stress life model as a life item, combining with a coupling life correction item, and establishing a multi-stress life evaluation model in a reciprocal form of the sum of reciprocals of the life items; and calculating a coupling life correction term and averaging by inversely solving an equivalent value of the single-stress life model under a multi-stress reference condition to complete model parameter calibration. The service life prediction precision and reliability are remarkably improved.

This application provides a solder layer aging test method, system, equipment, and medium, including: placing a pre-fabricated solder shell in a test area within a multi-physics coupling environment; simultaneously applying a thermal field, a mechanical vibration field, and an electromagnetic field to the pre-fabricated solder shell to perform accelerated aging testing; monitoring the performance of the pre-fabricated solder shell after the accelerated aging test to obtain the aging test results; wherein, during the accelerated aging test, based on a preset quantitative coupling relationship, the field parameters of the mechanical vibration field and / or the electromagnetic field are dynamically adjusted according to the state parameters of the thermal field. This application greatly improves the accuracy and reliability of the test results.

The invention discloses a reinforcing and protecting material for paper cultural relics and application of the reinforcing and protecting material. According to super-hydrophobic treatment liquid, silicon dioxide nanoparticles are modified through a silane coupling agent and a perfluoroalkyl trialkoxysilane coupling agent, an extremely low surface energy layer is constructed, and water is effectively prevented; the reinforcing treatment liquid adopts cellulose derivatives to form a hydrogen bond network with paper cellulose, so that the mechanical strength is remarkably improved. The hydrophobic property and the mechanical property are kept stable after dry-heat and damp-heat accelerated aging, and long-term preservation of cultural relics is facilitated. The design of the coating follows the principle of reversibility, the super-hydrophobic layer and the reinforcing layer are microcosmically firm and macroscopically integrally stripped, the super-hydrophobic layer and the reinforcing layer can be removed in a lossless mode through absolute ethyl alcohol and other mild solvents, the surface of the paper is restored to be close to the state before treatment, and a base material is not damaged or the appearance of the base material is not changed.

The invention provides an intelligent prediction system for monitoring the insulation state of a cable in real time. The system constructs a multi-dimensional evaluation basis by collecting electrical, environmental and load data, overcomes the limitation of an evaluation view angle caused by dependence on a single data dimension, and achieves the comprehensive evaluation of the insulation state. On the basis, the overall degradation phenomenon of insulation is decomposed into different components such as electrical performance reduction, environment accelerated aging and mechanical damage accumulation through various independent quantitative indexes, so that the root of degradation can be preliminarily distinguished, and a direction is provided for taking targeted maintenance measures. By identifying the working condition event in operation in real time, the prediction result can dynamically respond to event impact, and the prediction timeliness and reliability in a complex change environment are improved. According to the method, the prediction result of the insulation state is output by fusing the multi-dimensional index and the event situation, and the prediction result can be used for guiding routing inspection plan making or preventive maintenance arrangement, so that the practical value of the state monitoring result is enhanced.

The utility model provides a device for adjusting the temperature of a steam pipeline, and relates to the technical field of steam pipelines. The device for adjusting the temperature of the steam pipeline comprises a base and a small steam generator, a lifting mechanism is arranged above the base, an adjusting mechanism is arranged above the base, the adjusting mechanism comprises a mixing cavity and a low-temperature steam introduction pipe, the mixing cavity is installed above the base, and the low-temperature steam introduction pipe is installed above the base. The low-temperature steam introduction pipe is fixedly installed on one side of the mixing cavity, the other end of the low-temperature steam introduction pipe is fixedly installed on one side of the small steam generator, and the small steam generator is installed above the base. The device for adjusting the temperature of the steam pipeline solves the problems that the service life is shortened due to the fact that an existing steam pipeline is prone to creep deformation and fatigue at the high temperature, and creep deformation and aging of materials are accelerated if the steam temperature is too high, and achieves the beneficial effects that the steam temperature can be adjusted, and accelerated aging of the pipeline and equipment connected with the pipeline due to overheating is avoided.

This application relates to the field of ultraviolet accelerated aging testing technology, and in particular to a device and method for testing water-resistant and age-resistant silicone ultraviolet accelerated aging. The device includes a sleeve with a drive shaft rotatably mounted inside. A detachable cover is mounted on the sleeve, and a turntable is rotatably mounted inside the cover. A tester is mounted on the turntable and located inside the sleeve. The tester includes a polygonal frame mounted on the turntable and located inside the sleeve. Each face of the frame is embedded with a detachable clamp. This invention drives the polygonal frame to rotate at a uniform speed via the drive shaft, causing the outer surface of the silicone sample to circulate among uniformly arranged ultraviolet lamps. This avoids the irradiation attenuation problem of strong irradiation at the center and weak irradiation at the edges caused by traditional fixed irradiation methods. This ensures that all areas of the silicone sample receive uniform and stable ultraviolet irradiation, guaranteeing consistent aging levels and significantly improving the repeatability, accuracy, and reliability of the test data.

The application discloses a kind of for evaluating the method of power module reliability comprising the following steps: screening out weak components in power module and carrying out accelerated aging test, obtain the degradation state of weak components;Power module is divided into multiple functional modules and corresponding degradation state is bound to weak components, functional module and power module are simulated, and the performance degradation model of power module about overall performance is established;The accelerated aging test of the functional module of power module is carried out to correct the performance degradation model, and the final degradation model of power module is obtained;Measure the state data of power module to be evaluated, and obtain the reliability evaluation of power module by comparing the final degradation model.The application also discloses a kind of for evaluating the measuring system of power module reliability.The application evaluates the performance of power module by the running state of functional module and checks failure weak components, for predicting the remaining useful life of power module and the check replacement of failure weak components.

This invention discloses a method for assessing the long-term heavy metal release risk of biochar based on chemical oxidation simulation. The method includes: first, naturally culturing homologous biochar samples in soil to obtain a baseline value W0 for the target heavy metal release ratio; simultaneously, conducting a standardized accelerated aging experiment with an oxidant solution; and determining the number of aging cycles N required to reach W0 by comparison, thereby establishing a quantitative conversion relationship between "number of aging cycles" and "natural aging time". Then, the same accelerated aging experiment is performed on the biochar to be tested, and the number of experimental cycles is converted into an equivalent natural aging time using the quantitative relationship. A long-term release kinetic prediction model is then fitted and constructed, ultimately achieving rapid and quantitative prediction of the cumulative heavy metal release ratio after a target number of years. This invention provides an efficient and reliable tool for assessing the long-term chemical oxidation stability of biochar.