664 results about "Life test" patented technology

A method and system for predicting an effective remaining electrical life of a high-voltage circuit breaker. A circuit breaker electrical life test is carried out and associated data sets of single arcing times and single arcing energy are constructed; a degree of wear of a contact is replaced with accumulated arcing energy to characterize whether a circuit breaker fails; and function fitting is used to construct the relationship between the single arcing energy and the single arcing times; and on this basis, the method for predicting an effective remaining electrical life of a high-voltage circuit breaker is formed. Therefore, the rapid and accurate prediction of a remaining service life of a circuit breaker can be realized only by measuring simple data, thereby providing guarantee for the reliable operation of a power grid.

The application relates to the technical field of diaphragm testing, in particular to a diaphragm valve diaphragm service life testing device which comprises a box body and further comprises a first pipeline, a second pipeline, a water pump, an intermediate pipeline, a first testing part and a control part, wherein: one end of the second pipeline is in communication with the upper end of the first pipeline, and the other end of the second pipeline is in communication with the intermediate pipeline; the water pump is connected in series on the second pipeline; the first testing part comprises a testing pipeline, one end of the testing pipeline is in communication with the intermediate pipeline, the other end of the testing pipeline is located in the interior of the box body, the testing pipeline is provided with an opening, a clamping piece is arranged on the periphery of the opening, the clamping piece is used for mounting a diaphragm, a circular ring is arranged on the periphery of the clamping piece, a water-sensitive sensor is arranged in the circular ring, a driving part is arranged above the testing pipeline, the driving part is drivingly connected with a tension sensor, and a connecting rod is arranged at the bottom of the tension sensor. The diaphragm deformation life and the diaphragm rupture life can be simultaneously detected, and the comprehensiveness of diaphragm detection is improved.

The utility model discloses a temperature control water nozzle service life testing machine, and relates to the technical field of temperature control water nozzle service life detection. The temperature control water nozzle service life testing machine comprises a testing stand and a constant temperature water nozzle body, a fixing frame is fixed to the rear side of the top of the testing stand, a water supply pipe is embedded in the fixing frame, a water outlet pipe is arranged on the front side of the water supply pipe, a threaded sleeve is rotationally connected to the front end of the water outlet pipe and is in threaded fit with the constant temperature water nozzle body, and a hose is connected between the water supply pipe and the water outlet pipe. A screw rod is obliquely arranged on the inner side of the fixing frame, a movable block is arranged on the screw rod in a threaded mode, an elastic assembly is connected to the bottom of the movable block, a U-shaped frame is connected to the lower end of the elastic assembly, a pressing wheel is rotationally installed on the inner side of the U-shaped frame through a rotating shaft, and the pressing wheel is matched with a hose. By combining the elastic effect of the elastic assembly, the pressing wheel extrudes the hose, the size of the drift diameter of the hose is changed, the purpose of adjusting the water flow speed is achieved, the structure is simple, and use is convenient.

The invention relates to the technical field of spring measurement, and discloses a spring fatigue life test system and a dynamic balance evaluation method, and the system comprises a reference length acquisition module, a dynamic balance state determination module, a working condition spectrum loading module, a stress-strain response data acquisition module, a damage feature extraction module and a life evaluation module. Acquiring a reference length in a free state; step increasing preload is applied, and when it is detected that the deformation rate of the to-be-detected spring is smaller than a set threshold value, it is judged that the to-be-detected spring reaches a dynamic balance state; in a dynamic balance state, loading the to-be-tested spring based on the variable amplitude load time sequence signal, and synchronously acquiring stress-strain response data; identifying the stress characteristics of the to-be-tested spring in the load period; generating a life evaluation report based on the stress characteristics; the accuracy of the fatigue life of the spring can be improved.

The invention relates to the technical field of aero-engine turbine rotor blade fatigue life design, in particular to a multistage turbine rotor blade fatigue life analysis method and device. The method comprises the following steps: based on material fatigue performance data of turbine rotor blades and a three-dimensional finite element model of the turbine rotor blades, obtaining a target test temperature and a target test rotating speed of a multi-stage turbine rotor blade group in a low-cycle fatigue test and a stress coefficient of each assessment part of each stage of turbine rotor blades; and obtaining an actual fatigue test cycle number analysis result of each stage of turbine rotor blade based on the target test temperature and the target test rotating speed of the low cycle fatigue test of the multi-stage turbine rotor blade group and the stress coefficient of each assessment part of each stage of turbine rotor blade. According to the method, the function of carrying out fatigue life test on multiple groups of turbine rotor blades is realized, the test efficiency is effectively improved, the test period is shortened, and the economic cost is reduced.

The invention discloses a device and a method for testing the service life of a welding spot under a thermal-electric-vibration coupling load. The device comprises a thermal cycle device, a vibration device, a computer, a data acquisition instrument and a direct-current power supply. The thermal circulation device is fixed above a vibration table of the vibration device, threaded holes are formed in the vibration table, a circuit board can be fixed on the vibration table through screws, and thermal vibration coupling loading is achieved; a stable power supply is provided for welding spots on a circuit board through a direct-current power supply, so that heat-electricity-vibration coupling loading is realized; the welding spots are connected through the daisy chain, the resistance value of the welding spots is obtained through the data acquisition instrument, the computer is used for monitoring the resistance value, and an alarm value can be set, so that the service life of the welding spots is tested.

The invention belongs to the technical field of fatigue life acceleration test equipment, and particularly relates to an acceleration test device and method for the fatigue life of a rubber corrugated pipe limiting structure, the acceleration test device comprises a base and a heat insulation test box, the bottom end of the heat insulation test box is fixedly connected with the upper surface of the base, and two fixing through holes are formed in the outer wall of one side of the heat insulation test box. The device has multiple environment simulation functions, constructs a composite test environment close to the actual working condition, reflects the influence of different environments on the fatigue life of the limiting structure, improves the representativeness of the fatigue life test result of the rubber corrugated pipe limiting structure, realizes automatic failure judgment through resistance real-time monitoring, does not need manual intervention, and improves the test efficiency. The test convenience is improved, the accuracy of the fatigue life test result of the rubber corrugated pipe limiting structure is further improved, the double-sample synchronous test is realized, the time consumption of the multi-sample test is greatly shortened, and the detection efficiency of the fatigue test is remarkably improved.

The invention discloses a ship mechanical and electrical product accelerated life test stress profile generation method and device, a medium and a product, and relates to the field of ship reliability engineering and test.The method comprises the steps that working condition profile data and marine environment stress data of a target ship mechanical and electrical product under a typical navigation task are obtained, and a working condition-environment mapping model is established; according to the designed life target of the target ship mechanical and electrical product, the whole life cycle total damage to the target ship mechanical and electrical product is determined by using the working condition-environment mapping model and the failure physical damage model, an accelerated stress profile is generated by strengthening the stress level with damage equivalence as the principle, an accelerated factor is calculated, and an accelerated life test is performed; and failure data of the failure event is recorded, parameters of the failure physical damage model are calibrated, and the accelerated stress profile is iteratively optimized by using the calibrated failure physical damage model. Accurate and dynamic generation of the accelerated life test stress profile of the ship mechanical and electrical product is realized.

The invention provides a service life prediction method and device for an industrial robot RV speed reducer, and relates to the technical field of speed reducer service life prediction.The method comprises the steps that an acceleration load spectrum is determined according to torque and time history data, and multi-stage loads in the acceleration load spectrum are woven into a program block spectrum according to a preset sequence; all levels of loads in the accelerated load spectrum serve as independent working conditions to be applied to the multi-body dynamic model for dynamic simulation, a load and time history curve set of the key weak component is obtained and input to the cumulative damage model for life calculation, the simulated predicted life is obtained, and a damage cloud picture is generated; taking the program block spectrum as a test loading instruction to carry out an RV speed reducer accelerated life test to obtain a test observation life and a physical failure morphology; if the two are in the corresponding preset deviation range, taking the simulated predicted life as the predicted life of the current RV speed reducer; the problems of long test period, high cost and low reliability of a simulation model are solved.

The utility model discloses a workpiece service life test equipment, including the shell, the shell is separately provided with two and opposite independent equipment cabin and test cabin that distribute upside down in the inside, the equipment cabin one side inner wall is fixedly installed with hydraulic cylinder, the hydraulic cylinder piston rod one end extends to test cabin through the through -hole and is connected fixedly with the lifting plate, the lifting plate bottom surface and test cabin bottom inner wall all are provided with the multidirectional adjustment connecting assembly, and every multidirectional adjustment connecting assembly includes horizontal position adjusting mechanism and adjustable connecting mechanism, through setting multidirectional adjustment connecting assembly, can realize the flexible adjustment of the relative position of spring etc. two ends of cylindrical elastic workpiece, thereby simulating the compression extension fatigue test when the torsion of spring two ends misplacement occurs. This makes the test process closer to the stress state in the actual work of spring, effectively improves the accuracy of test result, and provides more reliable data support for workpiece design and quality evaluation.

The invention discloses a lithium ion battery calendar life evaluation method, which comprises the following steps of: firstly, obtaining test data based on a calendar life test design of an attenuation factor: setting a plurality of temperature stress gradients and SOC stress gradients to carry out a standing test on a battery, and keeping the battery in a set SOC and temperature state in a constant-temperature environment; regularly taking out in a test period to carry out a recoverable capacity test; then constructing a temperature stress attenuation model and an SOC stress attenuation model: according to temperature stress test data, establishing a temperature attenuation rate function based on an Arrhenius formula to obtain the temperature stress attenuation model; establishing an SOC attenuation rate function based on an inverse power law formula according to the SOC stress test data to obtain an SOC stress attenuation model; and finally, model compounding and life evaluation: compounding the temperature stress attenuation model and the SOC stress attenuation model to obtain a battery calendar life evaluation formula, and substituting the battery calendar life evaluation formula into the temperature, SOC and time of the target working condition to calculate the calendar life attenuation rate of the battery under the working condition.

The invention provides a Hall sensor test system and method, the system comprises a test device and an upper computer device which are in communication connection, and the test device comprises a control module, and a magnetic field simulation module, a counting module and a timing module which are respectively connected with the control module. The magnetic field simulation module can operate under the control of the control module and flexibly simulate a magnetic field environment acting on the Hall sensor; the counting module and the timing module count multi-dimensional index data for evaluating the service life of the Hall sensor to be tested; and the upper computer device is used for analyzing the index data transmitted by the control module so as to generate a life test report. According to the invention, the control module is connected with each module to realize efficient integrated control of the testing device, a complex working condition is cooperatively simulated through a reasonable connection relationship among the modules to test the Hall sensor, and then analysis of index data, namely remote and intelligent control of the testing process, is realized through the upper computer device. The test efficiency is improved.

The invention discloses a full-automatic life test system for an isolation device, which belongs to the field of reliability test of semiconductor devices, and comprises a system host used for providing a test environment and bearing a plurality of test channels; the high-low voltage isolation conversion module is arranged corresponding to each test channel and is used for switching between a high-voltage aging loop and an insulation resistance measurement loop of each channel; the real-time leakage current monitoring module is used for continuously monitoring the leakage current of each isolation device in the high-voltage aging process; the precision measurement and data acquisition module is used for carrying out insulation resistance measurement on the isolation device in a measurement mode; the central control and software system module is respectively connected with the high-low voltage isolation conversion module, the real-time leakage current monitoring module and the precision measurement and data acquisition module, and the central control and software system module is used for automatically triggering and controlling an insulation resistance measurement process according to leakage current data, judging the state of a device according to a measurement result, and outputting the state of the device. And aging and stopping of the test channel are managed.

The utility model discloses a service life testing machine for a switch elastic sheet, which belongs to the technical field of switch elastic sheets and comprises a workbench, and the rear end of the workbench is connected with an adjustable pressing mechanism. The front end of the workbench is fixedly connected with a control panel, an indicating lamp, a power switch, a starting switch and a stopping switch. The upper end of the workbench is fixedly connected with a bearing plate; the adjustable pressing mechanism comprises an adjustable driving assembly, a connecting assembly and a pressing assembly, and the adjustable driving assembly is connected to the rear end of the workbench; the front end of the adjustable driving assembly is connected with a connecting assembly; the upper end of the connecting assembly is connected with a pressing assembly. In this way, the adjustable driving assembly drives the connecting assembly to drive the pressing assembly to move up and down, the pressing assembly cooperates with the pressure bearing plate to press the switch elastic piece, and meanwhile the service life of the switch elastic piece is obtained through counting of the control panel; the frequency of pressing the switch elastic sheet by the pressing assembly is adjusted through the adjustable driving assembly, the reasonable use frequency is determined according to the test result, and the service life of the switch elastic sheet is prolonged.

The invention relates to a multi-element reliability test data dynamic weight optimization method, which comprises the following steps of: inputting data, including accelerated life test data, fault excitation data, a mean value of historical failure and a standard deviation; calculating entropy values and dynamic weights of various types of data according to a formula; according to the dynamic weight optimization method, weight distribution is performed on existing test data related to various reliability faults through a multi-source data weight distribution method fusing an entropy weight method and grey correlation analysis, so that a verification result is more credible. According to the entropy-gray combined calculation technology, the theory of information entropy and the theory of gray relational degree are integrated, and test data are adjusted through the product term of the information entropy and the gray relational degree to verify the distribution weight. According to the full-automatic weight distribution system, a real-time weight updating mechanism without manual intervention is achieved by updating an input sequence of data.

The invention discloses an automobile part accelerated life test method and system, and the method comprises the steps: setting an extreme temperature cycle: setting a cycle of keeping a low temperature of-40 DEG C for 30 minutes and keeping a high temperature of 180 DEG C for 30 minutes, and setting a temperature change rate of 15 DEG C / min; a multi-physics field coupling test: in an extreme temperature cycle process, synchronously carrying out a resistance test, a withstand voltage test, a turn-to-turn insulation test, a vibration test, a humidity test and a salt spray test, and comprehensively evaluating the electrical, mechanical and environmental adaptability of the parts; multi-scale numerical simulation: establishing material-level, part-level and system-level coupling models, and predicting life distribution of parts; and data-driven optimization: based on historical test data and a numerical simulation result, establishing an acceleration model, dynamically adjusting a temperature cycle parameter and a stress level, and realizing maximization of test efficiency. Based on extreme temperature circulation (-40 DEG C / 30 minutes to 180 DEG C / 30 minutes) and multi-physical field coupling strengthening stress testing, the test time is shortened by 70% or above, and the evaluation error is smaller than or equal to + / -5%.

The invention provides an aero-engine cold end disc life test evaluation spectrum compilation method and system, and the method comprises the steps: obtaining an actual measurement flight profile of a target engine, carrying out the rain flow counting and filtering preprocessing, and extracting a load cycle average amplitude pair; dividing a secondary cycle into multi-stage loads based on clustering analysis, and reducing the dimension of a two-dimensional load spectrum into a one-dimensional load spectrum through equivalent conversion; and determining the load frequency of each stage by combining an equal damage principle and an equal area method, and finally generating a test evaluation spectrum containing a main cycle and a secondary cycle. According to the method, through primary and secondary cycle separation, load grade clustering and low-high-low loading sequence design, distribution characteristics and sequence effects of actual loads are fully simulated, the problem that secondary cycle influences are ignored in an existing method is solved, the precision of a cold end disc service life test is remarkably improved, and a reliable basis is provided for determining and prolonging the service life of an aero-engine.

The utility model discloses a capacitor service life test clamp, and relates to the technical field of capacitor detection, the capacitor service life test clamp comprises a clamping box with one end provided with an opening, a clamping structure is arranged in the clamping box, and four corners of the upper and lower surfaces of the clamping box are fixedly connected with connecting rods. Through cooperative arrangement of the clamping box, the first clamping hole, the clamping plate, the second clamping hole, a spring and other structures, during use, the clamping plate is pushed to enable the first clamping hole and the second clamping hole to be aligned, the middle section of the capacitor penetrates through the first clamping hole and the second clamping hole, the clamping plate is loosened, the clamping plate moves under the action of the elastic force of the spring, and the capacitor is clamped. The inner walls of the first clamping hole and the second clamping hole clamp the capacitor from the two sides, the end of the capacitor is not subjected to clamping acting force, and it is avoided as much as possible that when a traditional test clamp fixes the capacitor, certain pressure is applied to the two ends of the capacitor, oxidation or falling off of a tin coating at the end of the capacitor is likely to be accelerated, weldability of the capacitor is reduced, and the service life of the capacitor is prolonged. And the reliability of the capacitor is influenced.

The invention provides a device, method and system for testing the service life of a surgical cutting instrument, and the method comprises the steps: obtaining the parameter information of the surgical cutting instrument, and the parameter information at least comprises the type information of the surgical cutting instrument; according to the parameter information, each moving assembly is controlled to move according to a preset track corresponding to the parameter information, so that the surgical cutting instrument is driven to cut a to-be-cut sample; in the process that the surgical cutting instrument cuts the sample to be cut, a cutting signal of the surgical cutting instrument is obtained in real time, and whether the moving assemblies are controlled to stop moving or not is determined according to the cutting signal. The test device drives the operation cutting instrument to move, in the cutting, grinding and other processes, the operation cutting instrument moves at a constant speed, the test process is not affected by human factors, errors are small, and the accuracy of the test result can be ensured.

The invention provides a lithium ion battery health state estimation method and system based on mechanical information and a medium, and the method comprises the steps: carrying out the full-life test of a battery cell of a lithium ion battery based on experimental parameters, and obtaining the experimental data of the battery cell; preprocessing the battery cell experiment data, constructing an expansion curve based on the optimized experiment data, extracting battery cell expansion characteristics, and analyzing battery cell response information; constructing a lithium ion battery health state prediction model, and analyzing lithium ion battery capacity attenuation state information according to the battery health state prediction model; analyzing battery health state information based on the lithium ion battery capacity attenuation state information, and analyzing battery performance according to the battery health state information to obtain performance evaluation information; the battery cell response information is calculated by analyzing the battery cell expansion curve, the lithium ion battery capacity attenuation state is analyzed according to the constructed lithium ion battery health state prediction model, the battery health state change is accurately analyzed, the battery performance is accurately analyzed, and the analysis precision is improved.

The invention relates to the technical field of equipment testing devices, in particular to computer keyboard key service life testing equipment. Comprising a supporting base, a keyboard fixing groove and a detection movable plate, and a mounting groove is formed in the detection movable plate; the detection control box body is slidably connected to the interior of the mounting groove, and a plurality of shaft body limiting holes are formed in the detection control box body; the adjusting control box body is connected in the detection control box body in an up-down sliding manner, and a plurality of shaft body fixing holes are formed in the adjusting control box body; the shaft body control plate is connected to the interior of the adjusting control box body in a sliding mode, and a shaft body reset hole is formed in the shaft body control plate; the detection shaft body penetrates through the shaft body limiting hole, the shaft body fixing hole and the shaft body resetting hole; the problems that an existing testing device is poor in adaptability to keyboard height changes, cannot adapt to keyboards of various heights and meanwhile is inconvenient to fix keyboards of different models are effectively solved. The device can adapt to keyboards of different models, is convenient to fix, and can greatly improve the detection efficiency.

The invention discloses a gear service life evaluation method, and belongs to the technical field of aerospace mechanism service life evaluation. According to the technical scheme, firstly, a five-stress wear rate data set containing the rotating speed, the torque, the temperature alternating, the vacuum degree and the microgravity is established; then constructing a tooth surface solid lubricating film thickness evolution model based on a Hertz-Archard coupling model, and taking the film thickness approaching to zero as a failure criterion; acceleration factors under each acceleration working condition are calculated through model iteration, and a gear acceleration life test is carried out under an optimized working condition; after the test, the film thickness is measured and compared with model prediction, the rated working condition life of the gear is reversely deduced, the long-time on-orbit life of the gear is equivalently predicted through the short-time ground test, and high acceleration efficiency and reliability are achieved. The technical problems of environmental simulation distortion and low acceleration efficiency in aerospace lubrication gear service life evaluation are solved.

The invention provides a plastic pipe service life test method and device, and the method comprises the steps: filling a low-level water tank and a circulation test pipeline communicated with the low-level water tank with a test solution, injecting the test solution into a high-level water tank communicated with the low-level water tank, and enabling the interior of the high-level water tank to have a preset test solution initial volume; wherein the high-level water tank is higher than the low-level water tank by a preset height, and a gas phase space is formed at the top of the high-level water tank; charging compressed gas into the gas-phase space to enable the gas-phase space of the high-level water tank to have preset pressure so as to apply back pressure to the test solution in the low-level water tank; under the back pressure condition, heating the test solution in the low-level water tank to a target test temperature; the backpressure condition and the target test temperature are maintained, and the service life of the plastic pipe sample in the circulation test pipeline is tested. Through the integrated structure and process design, the system is in a stable high-temperature and high-pressure test state, the energy utilization efficiency is improved, the operation cost is reduced, and the test efficiency is improved.

The invention discloses a rubber joint service life testing device and method, and the device comprises a rack, a lifting assembly disposed at one side of the top end of the rack, and a bottom platform fixed at the bottom of the rack, and the two sides of the top end of the rack are slidably provided with lower clamping assemblies used for fastening a flange at the lower end of a rubber joint. A neck-adjustable multi-station clamping assembly for fastening a flange at the upper end of the rubber joint is arranged above the lower clamping assembly, and a multi-connecting-rod Z-direction circulating stretching test assembly is mounted at the driving end of the lifting assembly. According to the invention, by utilizing reasonable mechanical structure design and multi-degree-of-freedom load application, the defects of low degree of freedom, single deformation mode and low driving efficiency of a traditional testing device are overcome, and the authenticity and efficiency of the fatigue life test of the rubber joint are improved, so that the complex deformation behavior of the rubber joint in the actual working condition is more comprehensively simulated.

The invention discloses a service life prediction and reliability evaluation method for a DC-DC converter. The method comprises the following steps: carrying out consistency screening on test samples; determining the type and level of acceleration stress; screening pre-test and stress sensitive parameters; the implementation of the life test is accelerated; and constructing a life model and evaluating reliability. According to the method provided by the invention, by establishing the voltage-temperature dual-stress acceleration model, the degradation process of the device under the actual working condition is reflected more accurately; an analysis framework suitable for scenes containing failure data and non-failure data at the same time is provided, and point estimation and confidence intervals of parameters for reliability evaluation under the non-failure data condition can be provided; the method realizes accurate evaluation of the service life and reliability of the DC-DC converter before installation, has the characteristics of high prediction precision, high engineering practicability, wide application range and the like, can be widely applied to the field of reliability evaluation of various DC-DC converters, and provides data support for installation type selection, maintenance strategy formulation and system reliability design of devices.

The invention relates to an active oxygen concentration control method and a brain-computer interface implant accelerated life test system. The accelerated life test system is used for testing the electrochemical performance of a brain-computer interface implant by using a test solution. The method comprises the following steps: detecting a current feedback current corresponding to a current test solution; obtaining the current active oxygen concentration according to the current feedback current and a preset active oxygen concentration and current relation function; generating a filling parameter according to a concentration difference value between the current active oxygen concentration and a preset active oxygen concentration; and adding a hydrogen peroxide solution into the current test solution according to the filling parameters, so that the current test solution reaches the preset active oxygen concentration. According to the method, the active oxygen environment generated by immune reaction in a living body can be simulated through the test solution, the active oxygen concentration in the test solution can be precisely regulated and controlled, and the accuracy of the test result of the brain-computer interface implant is improved.

The invention provides a reliability evaluation method and device based on highly accelerated life test fault data in order to solve the problems that the reliability of existing highly accelerated life test fault data lacks an effective quantitative evaluation means and the evaluation precision is insufficient due to limited fault data. The method comprises the following steps: converting fault data in a step stress test into equivalent fault data under a normal stress condition according to an acceleration factor and time reduction principle; based on a Bayesian theory and a self-service sampling method, constructing a single-parameter reliability evaluation model; and constructing a multi-parameter reliability evaluation model by adopting an entropy-distance fusion algorithm, and carrying out comprehensive evaluation on the reliability of the test complete machine. According to the method, the time reduction principle and the Bayesian theory are combined, reliability quantitative evaluation under the stepping stress condition is achieved, the evaluation precision is improved, compared with performance degradation data, the method has wider applicability, and the actual evaluation requirement can be better met.

The invention provides a service life test device for a corrugated pipe assembly of an oil pump regulator, which is characterized in that a gas tank is connected with a gas inlet port of a gas source pressure conversion device, and a gas outlet port of the gas source pressure conversion device is connected with one end of a constant gas pressure joint and a pressure inlet of a circulating switch controller; a pressure outlet of the circulating switch controller is connected with one end of the circulating alternating air pressure joint, and the other end of the constant air pressure joint is connected with one end of the shell; the other end of the circulating alternating air pressure joint is connected with the other end of the shell; the limiting block is fixed in the shell and located between the constant air pressure connector and the corrugated pipe assembly, a through hole is formed in the limiting block, and the measuring block is installed in the middle of the corrugated pipe assembly and can axially move along with a product. The displacement sensor is fixedly installed on the outer side of the shell and aligned with the middle position of the measuring block. Two different pressures can be provided at the same time, pressure circulation is achieved, product installation and actual working conditions are simulated, and the performance of the corrugated pipe assembly of the oil pump regulator is detected.

The invention discloses a connector plugging service life test device and method, and relates to the technical field of connector test.The device comprises a base box, a support frame is installed at the upper end of the base box, first openings are formed in the two opposite side walls of the support frame, an upper computer is installed at the upper end of the support frame, and the upper end of the upper computer is provided with a second opening. The upper computer is provided with a connector connected with the male head and the female head of the connector through connecting wires, a movable frame is arranged in the support frame, and a second opening corresponding to the first opening is formed in the movable frame. According to the invention, third electric push rods are arranged at the top and the bottom of the movable frame, and then the third electric push rods push the connector on a second rubber clamping block to slightly shift, so that the connector can be clamped and fixed, and the connector can be clamped and fixed. Therefore, actual plugging conditions of people are simulated, actual operation is closer, and the precision of the connector plugging test is improved.

The invention discloses a valve life test method based on multi-modal sensing and deep learning, which comprises the following steps: acquiring high-frequency original data of valve operation through a multi-modal sensing system consisting of a broadband acoustic sensor array, a vibration accelerometer and a high-precision micro-flowmeter; the method comprises the following steps: automatically extracting features sensitive to early degradation from original data by using a deep learning model fused with a one-dimensional convolutional neural network and a Transform encoder; the high-dimensional features are mapped into single health index values through neural network regression to quantify the performance degradation degree; and a historical sequence of the health indexes is learned by using a time sequence convolutional network, and a future evolution trajectory is predicted, so that the residual life of the valve is accurately calculated. Sensitive detection and non-destructive life prediction of early weak faults of the valve are achieved, and the defects that a traditional physical testing method is long in period, high in cost and incapable of early warning are overcome.