82 results about "Life evaluation" patented technology

The present application belongs to the technical field of energy storage safety related, especially relates to a kind of battery life evaluation method, battery protection method and evaluation device.The present application obtains the operation data inside battery monomer periodically, and the operation data is input into preset risk assessment model;Risk assessment model calculates risk parameters according to operation data, and risk assessment model calculates safety parameters according to risk parameters;Wherein, operation data includes temperature and pressure operation data.Through the operation data of the pressure and temperature of the battery when evaluating the battery coefficient is collected, and the risk parameters of the battery are calculated, thereby avoiding the existing evaluation method to exist indirectness and hysteresis of safety monitoring, single dimension of safety risk assessment, inaccurate economic value evaluation and other problems.

The application discloses a hoisting belt life evaluation method and relates to the field of hoisting belts, which has the technical scheme as follows: the method comprises the following steps: step S1: image acquisition; step S2: wear state analysis; step S3: working condition acquisition; step S4: database matching; step S5: risk evaluation, the geographical position of the wear area is compared with the geographical position of the high-stress area; and step S6: result output. Through multi-dimensional feature analysis of the identification points by means of an image processing algorithm, the application realizes accurate quantification of the wear state from a microscopic level, intelligently matches the wear position information with a high-stress area database under different hoisting modes, and establishes a multi-level safety evaluation mechanism comprising overall scrapping judgment, working condition risk early warning and wear density analysis.

The present application relates to the technical field of LED control circuit board manufacturing, solves the problem that the host computer cannot accurately learn the actual health status of the selenium drum in the prior art, which leads to inaccurate evaluation of the service life of the selenium drum and affects the reliability of the LED circuit control board, and provides a selenium drum service life evaluation method, device, equipment and medium based on state monitoring. The method comprises the following steps: obtaining the reference corresponding relationship between the printing data and the consumption of the selenium drum by performing test printing; monitoring the selenium drum to obtain actual state data; obtaining the actual corresponding relationship between the printing data and the consumption of the selenium drum; obtaining the consumption deviation value according to the reference corresponding relationship and the actual corresponding relationship; and evaluating according to the consumption deviation value and the actual state data to obtain a service life evaluation result. The present application comprehensively evaluates the service life of the selenium drum based on the consumption deviation and the actual state, thereby effectively improving the accuracy and real-time performance of the service life evaluation.

The present application relates to the field of material science and engineering application technology, specifically to a kind of metal material thermal mechanical fatigue life fast prediction method based on hysteresis energy density.First, hysteresis curve is used to calculate hysteresis energy density, then the quantitative relationship between shape coefficient, stress variation range and plastic strain range between low cycle fatigue and thermal mechanical fatigue is used, to achieve the purpose of predicting thermal mechanical fatigue hysteresis energy density under the same mechanical strain amplitude by low cycle fatigue, finally, energy accumulation damage model is used to predict thermal mechanical fatigue life.The method carries out two groups of experiments for low cycle fatigue and thermal mechanical fatigue respectively, realizes the prediction of thermal mechanical fatigue life under different mechanical strain amplitudes by low cycle fatigue, establishes the correlation between low cycle fatigue and thermal mechanical fatigue by using the similarity between them in the process of cyclic loading, effectively reduces the experimental amount required for thermal mechanical fatigue life evaluation, and is applied to the thermal mechanical fatigue life prediction of high-temperature alloy and vermicular cast iron and other metal materials.

This invention discloses a method and system for assessing the remaining lifespan of vehicles based on multi-dimensional dynamic fusion, belonging to the field of intelligent connected vehicle health assessment technology. The assessment method includes: collecting multi-source data, calculating five-dimensional lifespan sub-factors, dynamically configuring weights based on vehicle type, life cycle, and usage scenario, and weighted fusion to output a comprehensive remaining lifespan index for the vehicle. The assessment system includes a data acquisition and processing layer, a multi-dimensional factor fusion and assessment layer, and an application interface layer. The multi-dimensional factor fusion and assessment layer includes a multi-dimensional health factor extraction module, a dynamic factor weight adjustment and fusion module, and a status assessment and remaining lifespan prediction module. This invention is based on a lifespan factor quantification system encompassing five dimensions: time, health, usage, environment, and value. It adaptively adjusts weights according to vehicle type, life cycle, and usage scenario to achieve a comprehensive and accurate assessment of the vehicle's remaining lifespan, improving the prediction accuracy of the vehicle's remaining lifespan.

The present application relates to the technical field of water-based sodium-ion battery energy storage system life evaluation, and discloses a water-based sodium-ion battery energy storage system life evaluation method, device and product, comprising: obtaining real-time electrolyte state parameter set in the operation process of the water-based sodium-ion battery energy storage system, and real-time electrochemical impedance spectrum and real-time voltage relaxation curve under the current multi-physical field coupling detection working condition; extracting features from the real-time electrochemical impedance spectrum and the real-time voltage relaxation curve, and determining a real-time feature parameter set; based on the real-time electrolyte state parameter set and the real-time feature parameter set, processing through a target life prediction model based on material attenuation mechanism to obtain a health state evaluation value and a remaining service life prediction value of the water-based sodium-ion battery energy storage system. Therefore, by implementing the present application, the electrolyte state and the multi-physical field electrochemical characteristics are fused into the mechanism type model for the first time, and accurate, interpretable and real-time life evaluation of the water-based sodium-ion battery energy storage system is realized.

The application provides a battery pack life evaluation method and device and test equipment, and relates to the technical field of electric vehicles. The method comprises: performing cell life testing on a cell to obtain cell test data, wherein the cell life testing comprises cell cycle life testing and / or cell calendar life testing; performing cycle life testing on a battery unit to obtain unit test data, wherein the battery unit is used to simulate a part of cells in a to-be-evaluated battery pack CTP structure constructed by using at least one cell; and obtaining a life evaluation result of the to-be-evaluated battery pack according to the cell test data and the unit test data. The scheme of the application solves the problem that, in the prior art, the starting time of battery pack life evaluation is late, resulting in a long battery development cycle and high test cost.

The application relates to the cross field of artificial intelligence and material science, and discloses a special polymer multi-environment coupling aging track prediction method and system, which solves the problems that existing aging life prediction is difficult to handle multi-factor coupling and lacks micro-mechanism characterization. The method acquires an initial molecular topological graph and a service environment stress sequence, extracts polymer chain topological features by using a graph neural network, and extracts dynamic stress features by using a time series deep learning network; time and space features are aligned and fused through a cross-modal attention mechanism; and the macroscopic performance aging track curve and the microscopic bond rupture probability distribution of a polymer material are synchronously predicted. The application can realize accurate prediction of material performance under multi-coupling environment and provide micro-explanation of failure mechanism, and is suitable for service life evaluation of polymer materials in the fields of aviation, aerospace and the like.

The present application belongs to the technical field of low-voltage reactive power compensation device state monitoring, and discloses a compensation branch health identification and life evaluation method of an intelligent metal comprehensive distribution box. The present application aims at the failure problem caused by the coupling of the wear of the composite switch action, the attenuation of the compensation capacity and the harmonic stress in the compensation branch, collects the response residual, action delay, temperature rise, harmonic stress and action frequency of each compensation branch, constructs a light gradient boosting classification model to identify the health grade and calculate the health score, combines the health score, action life consumption and temperature rise stress damage to estimate the remaining life, and finally performs risk sorting and outputs maintenance suggestions such as reexamination, replacement or reduced capacity operation. The present application can comprehensively compensate the multi-dimensional characteristics such as response, switch action, thermal stress and harmonic stress, quantifies the health degree and remaining life before the branch completely fails, and effectively improves the accuracy and interpretability of the predictive maintenance of the compensation branch of the distribution box.

This invention relates to the field of physics field calculation technology and discloses a multi-physics field coupling life assessment method for disconnecting switches. The method includes: real-time monitoring and deduction of the transient electromagnetic, thermal, and stress coupling states inside the switch to achieve accurate quantitative assessment of contact losses, aiming to promote efficient resource utilization and green management throughout the entire life cycle of power equipment. The method includes: calculating the rate of change of current based on transient current at adjacent sampling times; solving for local volumetric heat source density and radial temperature gradient by combining material properties; quantifying structural stress and frequency shift using thermoelastic theory; correcting the dynamic separation speed of the contacts through coupled electromagnetic repulsion; and finally calculating the vaporization and ablation loss volume based on the micro-arc energy density. This invention effectively improves the scientific nature of disconnecting switch maintenance decisions, reduces resource waste caused by premature maintenance, supports low-carbon energy conservation and green production in power systems, and achieves accurate life extension and efficient recycling of equipment.

Embodiments of the present application disclose a high-temperature pressure-containing header creep residual life evaluation method and device. The method comprises: obtaining working condition data of a header to be evaluated and creep test data of a main steam pipeline in the same batch; fitting a creep curve of the main steam pipeline based on the creep test data, and establishing a parameter mapping of a theta parameter set and working condition variables; calculating an internal pressure reduced stress at a thinnest hole bridge position, and substituting the working condition data into the mapping to obtain a corresponding theta parameter, and then obtaining a creep curve equation under the working condition; calculating the creep residual life of the header to be evaluated according to the creep curve equation, the working condition data and the creep test data; and the device is composed of data acquisition, fitting and mapping, stress calculation, parameter migration and life evaluation units. Through curve migration and life evaluation of the same batch test data and working condition data, the consistency and traceability of the evaluation results are improved, and the stress correction for the weakest part further improves the result accuracy.

The application relates to a life evaluation model establishment method and device, equipment and a storage medium, which are applied in the field of integrated circuits, comprising determining an electrical stress condition of the power device, measuring a failure time of the power device under the electrical stress condition, calculating a Weibull cumulative distribution function of the power device under the failure time, fitting and calculating a characteristic life value of the power device under the electrical stress condition according to the Weibull cumulative distribution function and a preset global shape factor, constructing a deep neural network model, training the deep neural network model by using the characteristic life value obtained by fitting and calculation, and generating an accelerated life evaluation model. The application has the technical effect of performing failure analysis and life evaluation on a device with complex process and structure, and improving the evaluation accuracy.

The utility model discloses a kind of DC metalized film capacitor life evaluation test device, DC metalized film capacitor life evaluation test device includes simulation evaluation device, support detection frame, support stand, fixed base, motor, driving gear, sliding clamping slot and detection part, detection part includes voltage sensor, current sensor, sliding tooth plate, fixed mounting plate, support table, DC metalized film capacitor, fastening threaded column, detection clamping seat and temperature sensor, simulation evaluation device includes lifting support frame, data processing and analysis module, first mounting plate, environmental simulation part, second mounting plate and first electric push rod. The utility model is convenient to operate, can simulate the actual operating environment of capacitor under complex working condition, accurately evaluates the life of capacitor.

The application discloses a kind of magnetorheological fluid power transmission damage test method and system, and it is related to magnetorheological fluid test technical field.System includes transmission unit, observation unit and measurement and control unit, transmission unit includes servo motor, torque sensor, magnetorheological fluid driver and load, magnetorheological fluid driver is equipped with replaceable active disc, driven disc, excitation coil, transparent observation window and anti-centrifugal dispersion type magnetorheological fluid;Observation unit includes optical high-speed microscope, for collecting particle chain distribution evolution image and wall wear image;Measurement and control unit are used for synchronous acquisition rotation speed, torque and magnetic field intensity and control excitation current.The application can establish corresponding relationship with the wall wear characteristics obtained after experiment pause by macroscopic power parameter, particle chain microcosmic evolution parameter, can quantitatively analyze the influence of different wall surface parameters on transmission damage, provides basis for magnetorheological fluid transmission device structure optimization and life evaluation.

The application discloses a kind of on-line evaluation methods of remaining service life of insulation bus duct, belong to the technical field of electric power equipment.The method comprises: obtaining the reference thermal life parameters of insulating material, including activation energy and frequency factor;Real-time temperature data in operation is obtained according to sampling period;Characteristic life value under current temperature is calculated based on the temperature data using Arrhenius equation, and the ratio of sampling period length and characteristic life value is taken as the thermal aging loss increment of the period;Loss increment is accumulated to historical cumulative thermal aging loss total value;Whether the cumulative value reaches the life termination threshold is judged, and the remaining service life evaluation result is calculated and output when not reached.The application combines thermal aging model with on-line temperature monitoring, to realize dynamic evaluation under variable temperature condition in the form of discrete time sampling and loss accumulation, solves the problem that offline evaluation cannot reflect actual operation condition cumulative aging, algorithm is simple, deployment cost is low, and is suitable for bus duct on-line monitoring.

The application discloses a kind of eyeglass plate cutting ring life evaluation system and method, and evaluation system includes upper pumping system, lower pumping system, upper hopper, lower hopper and conveying pipe, upper pumping system discharge outlet is connected with upper hopper, upper hopper lower side is further provided with blanking opening, lower hopper is located lower side of blanking opening, lower pumping system suction port is connected with lower hopper, and upper pumping system suction port is connected with lower pumping system discharge outlet by conveying pipe. Two groups of concrete pump truck pumping systems are used to evaluate the service life of the eyeglass plate cutting ring.

The application discloses a kind of based on temperature field test's board-level circuit thermal failure life quick evaluation method, it is related to electronic product reliability evaluation field, including PCB whole board power-on work to steady state, the temperature field data of PCB whole board is collected;The highest temperature, the lowest temperature and average temperature of key device on PCB board are extracted, and temperature data is processed, to obtain the effective temperature load of key device;Based on failure physical model and processed temperature data, the thermal cycle fatigue failure cycle number of key device interconnection structure on PCB board and the failure rate of key device are calculated, to obtain life calculation result;The failure occurrence time of key device interconnection structure and key device is calculated, to complete the weak link determination and life evaluation of PCB whole board.The application avoids the problems that traditional environmental test chamber temperature cycle test is time-consuming, cost is high, real application scene cannot be simulated and prediction deviation is large due to model parameter setting inaccuracy in pure simulation analysis.

The present application relates to the technical field of weld vibration fatigue life evaluation, and particularly relates to a weld vibration fatigue life evaluation method based on a simplified modal structure stress method. Specifically as follows: a simplified finite element model of a welded structure not containing weld details is established, and the structural modal of the simplified finite element model is calculated; the modal coordinate time history is obtained according to the structural modal, and the modal structural stress at the weld toe is calculated through linear difference; the modal coordinate time history and the modal structural stress at the weld toe are superimposed to obtain the structural stress time history at the weld toe; the structural stress change range and the cycle number are obtained through rain flow counting statistics according to the structural stress time history at the weld toe; the equivalent structural stress is calculated; and the damage and fatigue evaluation results of the weld are obtained by using the main S-N curve method. The modal structural stress at the weld toe is calculated through linear difference, the work load of establishing the finite element model can be greatly simplified without establishing the weld details, the modeling complexity is reduced, and the modeling efficiency is improved.

The application discloses a kind of comprehensive test platform fatigue strength checking method and system, the method includes according to platform yield strength calculation checking result to determine the fatigue hot spot area to be analyzed;Through the Genie module of SESAM software, the fatigue hot spot area is refined to obtain refinement result;The statistical result of pre-set coastal wave dispersion diagram is selected to occur probability maximum three wave working conditions, and three kinds of calculation working conditions are designed according to the refinement result to obtain node stress calculation result;According to pre-set rule, node stress calculation result is processed, to predict the fatigue damage degree and fatigue life of fatigue hot spot area based on S-N curve fatigue analysis.The fatigue life evaluation of structure is provided.This process not only improves the accuracy of analysis, but also provides an important basis for subsequent design optimization and safety evaluation.

The application discloses a kind of aerospace engine nozzle regulating piece repeated life examination test methods.The described method is respectively to test sample medium-tail gas-load-temperature environment examination test and tail gas-load-temperature environment examination test: the cycle of above-mentioned two tests obtains a big cycle, after each big cycle ends, the performance of test sample is detected according to failure criterion and fitting curve, when the life index of test sample drops below failure criterion, the number of cycle test is obtained according to the fitting curve, the repeated life under different failure criterion is calculated according to the number of cycle test, select the shortest one as repeated life.The application realizes the repeated life evaluation of military aircraft nozzle regulating piece by medium-tail gas-load-temperature environment examination test and tail gas-load-temperature environment examination test, guarantees the service safety of aerospace equipment and makes the life of regulating piece to be fully played.

This invention provides a method, apparatus, electronic device, and medium for predicting battery calendar life. The prediction method includes the following steps: constructing a prediction model between combined health factors and a storage independent variable; and numerically fitting the prediction model using experimental data from the storage independent variable and the combined health factors during the storage test, solving for the model parameters in the prediction model, and obtaining a prediction model for battery calendar life. The combined health factors include indirect health factors and direct health factors. This invention selects a combination of direct and indirect health factors for numerical fitting to examine the contribution ratio of each electrochemical parameter in the later capacity loss. The fitting effect is excellent, and the battery life evaluation cycle is greatly shortened, with high prediction accuracy.

The application discloses a tractor gearbox fatigue life evaluation method based on digital twinning, comprising the following steps: collecting dynamic stress data at a vulnerable position of the tractor gearbox; constructing a virtual three-dimensional model of the tractor gearbox according to actual use conditions, setting stress in the virtual three-dimensional model in simulation software, and obtaining fatigue life simulation test data of the tractor gearbox through simulation analysis; fusing the fatigue life data of the tractor gearbox obtained through experimental testing and the fatigue life simulation test data of the tractor gearbox, and evaluating the fatigue life of the tractor gearbox through the fused data. The specific parameters of the tractor gearbox during work are simulated by using the digital twinning technology, the fatigue life simulation test data obtained after the virtual three-dimensional model of the digital twinning is simulated and the fatigue life data obtained through experimental testing are fused, so that the fatigue life of the gearbox of the tractor can be effectively evaluated, and the fatigue life analysis of the gearbox is more accurate.

The application provides a kind of reverse reconstruction method, system and related device of in-service wind turbine whole machine approximate aeroelastic model, belong to wind power generation technical field, method includes: first according to rated power and wind wheel diameter from aeroelastic simulation model library select matched preset basic model;Then the actual technical parameters of unit, blade and tower information are updated to the model, obtain updated model;Subsequently, the blade mass and stiffness distribution in the model are calibrated according to the blade geometric information;Finally, the aerodynamic performance is calibrated by comparing the design power curve and thrust curve, so as to obtain the whole machine approximate aeroelastic model.The application can construct high-fidelity whole machine aeroelastic model without original factory confidential data, and provide independent and reliable digital simulation tool for in-service unit load analysis, life evaluation and operation optimization.

The application discloses a lightning arrester valve piece failure probability evaluation method, relates to the technical field of zinc oxide valve pieces of lightning arresters, and is used for solving the problem of inaccurate evaluation results. The method comprises the following steps: performing a thermal power consumption characteristic test on a zinc oxide valve piece to obtain an accelerated aging time; calculating the residual life of the valve piece by means of the Arrhenius model according to the accelerated aging time; calculating the reliability of the valve piece by means of a double-parameter Weibull distribution model according to the residual life and an operation life; and calculating the failure probability according to the reliability and the operation life. The application further discloses a lightning arrester valve piece failure probability evaluation device, an electronic device and a computer storage medium. The application makes the valve piece life evaluation result more accurate by means of the Arrhenius model combined with the double-parameter Weibull distribution model.

The application provides a kind of photothermal power station steam generation system online life monitoring method and system, belong to solar photothermal power generation and industrial equipment digital twin and condition monitoring technical field, the monitoring method constructs system level zero-dimensional dynamic simulation model, by carrying out offline three-dimensional thermal coupling analysis to different heat exchanger, stress concentration parts are identified and extracted as local three-dimensional model.Online monitoring, use measured parameters and lumped parameter micro-element model to generate local boundary conditions to drive local three-dimensional model calculation.At the same time, according to the difference of running temperature life evaluation: for the equipment below threshold temperature, carry out fatigue life evaluation based on thermal coupling;For the equipment higher than or equal to threshold temperature, further carry out local creep analysis, realize high-precision life evaluation under the interaction of creep-fatigue by superposition processing.The application greatly reduces the amount of calculation, realizes the efficient, online real-time life monitoring of photothermal key equipment under high temperature complex working condition.

The application discloses a kind of high-temperature heated compression brittle solid material life evaluation method, for high-temperature heated compression brittle solid material, first process four categories specific size samples, by triaxial compression, compression rheology, CT scanning and other kinds of tests, measure compressive strength, strain-time curve and initial damage key parameters, based on fracture damage mechanics, the deformation time evolution equation containing temperature, stress and other parameters is used for life evaluation, the application is based on fracture mechanics theory, verify that the trend of theoretical curve and test curve is similar and numerical comparable, ensure that life evaluation result is reliable.