193 results about "Cyclic test" patented technology

The invention discloses a method for calculating the real-time hydrogen storage amount and the remaining endurance mileage of a fuel cell vehicle, and belongs to the solid hydrogen storage amount measurement technology of a fuel cell. The method comprises the following steps: firstly, carrying out calibration and cycle test analysis on a hydrogen storage material, including establishing relationships between hydrogen storage capacity, temperature and pressure in a full life cycle of a fuel cell stack; the initial hydrogen storage amount is obtained when the vehicle is started, and the obtaining mode comprises the steps that the temperature of the hydrogen storage device and pressure sensor data are read based on the FCU to convert and calculate the initial hydrogen storage amount; when the vehicle runs, the hydrogen consumption amount of the fuel cell stack and the remaining hydrogen storage amount in the hydrogen storage device are calculated in real time, the remaining endurance mileage is calculated in real time on the basis of the remaining hydrogen storage amount, and calculation includes calculation based on the driving mileage within the time t1 to t2 and the hydrogen consumption amount. The method can overcome the defect that in the prior art, the error of estimating the hydrogen storage amount based on thermodynamics in the vehicle running process is too large, the estimation precision of the real-time hydrogen storage amount in the hydrogen storage device is improved, application of hydrogen energy to new energy vehicles, ships and aircrafts can be promoted, and precise prediction of endurance is improved.

The invention relates to the technical field of safety performance testing, and discloses an anti-falling waistcoat protection performance testing method and system. According to the method, a bionic human body model is driven through a multi-degree-of-freedom impact simulation device, a standard test dummy wearing an anti-falling waistcoat is impacted in multiple preset postures including the combination of a pitch angle and a roll angle, and a real falling scene is simulated; a flexible piezoresistive sensor array embedded into the inner layer of the waistcoat is used for collecting dynamic pressure distribution data in real time, and an air bag unfolding time sequence image is synchronously recorded; calculating a pressure dispersion rate based on the pressure data, determining protection response delay in combination with image analysis, and generating an attitude adaptability evaluation index through a multi-attitude test result; and finally, executing a continuous inflation and deflation cycle test to evaluate the sealing performance and the sensor stability. According to the method, the dynamic protection performance, the airbag response efficiency and the long-term use reliability of the anti-falling waistcoat in a complex impact posture can be comprehensively detected, and the consistency of a test result and an actual protection effect is improved.

The invention relates to the technical field of microswitches, and discloses a microswitch contact life test method and system, and the method comprises the steps: carrying out the contact preheating operation and resistance reference measurement of a microswitch, and obtaining a contact resistance reference value and an initial fluctuation characteristic spectrum; setting a contact degradation monitoring threshold value based on the contact resistance reference value and the initial fluctuation characteristic spectrum; placing the microswitch in a test device for loop test, and recording a contact state data set in each test period; performing weighting processing on the contact state data set according to a test period, and calculating an average resistance fluctuation metric value and a contact degradation evaluation index; and performing dual-mode contact failure detection based on the average resistance fluctuation metric value and the contact degradation evaluation index, and generating target early warning signals of resistance abrupt change type and gradual change type failure modes, thereby improving the identification capability of different types of microswitch contact failure modes, and effectively avoiding sudden faults of equipment caused by contact failure.

The invention relates to the technical field of aircraft part detection, and particularly discloses an intelligent detection device for aircraft part processing, which comprises a box-type base, a mounting groove, a simulation mounting mechanism, a test mechanism, a top reset mechanism, a top shell, a controller, temperature adjusting equipment and humidity adjusting equipment, the simulation mounting mechanism can simulate flight vibration; the testing mechanism is arranged at the top end of the mounting groove and located on the rear side of the mounting groove, and the testing mechanism can simulate the using action of a passenger; the top resetting mechanism is arranged above the testing mechanism and can be used for resetting assistance and cyclic testing. Through the detection mode of scene simulation and automatic operation, the problem that a traditional single vibration or isolated action test is disjointed with an actual scene is solved, the detection efficiency and reliability are improved, the performance of the seat in an extreme environment is reflected more accurately, and a core guarantee is provided for aviation safety.

The invention provides a battery failure prediction method and device, a storage medium and a program product, and relates to the technical field of batteries. The battery failure prediction method comprises the steps of obtaining cycle test data of a battery; calculating the cycle test data of the battery to obtain a plurality of dimension curves, wherein the plurality of dimension curves comprise SOH curves; the number of first alarm points existing in the multiple dimension curves is obtained, and in each dimension curve, the situation that each feature exceeds the feature threshold value of the dimension curve is recorded as the situation that one first alarm point exists; performing inflection point detection on the SOH curve to obtain the number of inflection points in the SOH curve; and determining whether the battery fails or not according to the number of the first alarm points and the number of the inflection points. According to the invention, the accuracy of failure prediction of the battery is improved.

The invention relates to a strengthening test method for a low-position picking vehicle, and the method comprises the following steps: designing a circulation path which is provided with a straight road section and a turning road section, and is provided with a following motion test point; cyclic test: enabling the test vehicle to start from the starting point and run along the cyclic path until the test vehicle returns to the starting point under different load conditions in sequence; in the running process, when the test vehicle runs to the following action test point, carrying out a following action test; and the cyclic test is repeated until the test time is reached. The invention provides a strengthening test method which is more fit with the actual working condition of the low-position picking vehicle, can simulate the extreme working condition of the low-position picking vehicle in the actual use environment, and can comprehensively evaluate the mechanical structure strength, the electrical system stability and the hydraulic system durability of the vehicle.

The invention belongs to the technical field of metal plate processing and testing, and particularly discloses a device and method for testing the bending forming capacity of a metal composite plate. The device comprises a test base, a movable heating mechanism which slides and can be locked on the test base, a bending test mechanism rotationally connected to the test base, a fixed hydraulic mechanism, a first driving motor and a second driving motor, a heating element is arranged in the movable heating mechanism, so that the plates can be uniformly heated on line; the bending test mechanism controls the clamping force and the bending angle of the bearing through a servo motor in a closed-loop manner, and collects pressure and angular displacement data in real time; and the hydraulic telescopic head of the fixed hydraulic mechanism executes reverse pushing after single bending, so that a fatigue cycle test is realized. According to the invention, normal-temperature / thermal-state multi-angle bending and fatigue testing can be carried out on metal composite plates with different specifications, the forming limit and layering failure critical parameters are rapidly obtained, and the process optimization efficiency and the product reliability are improved.

The invention discloses a permanent magnet motor magnet performance degradation evaluation method, belongs to the field of permanent magnet motor tests, and is used for solving the technical problem that reversible demagnetization and irreversible demagnetization are difficult to effectively distinguish in the prior art. The method comprises the following steps: step 1, installing a selected adaptive permanent magnet rotor assembly on a motor installation seat of a test bed; 2, hardware debugging is completed; 3, test parameters are set, and a cooling module is started; 4, starting the to-be-tested permanent magnet motor according to a set rotating speed, gradually applying a load by a loading device according to a test requirement, and monitoring the running state of the motor in real time; step 5, collecting performance data of the permanent magnet motor to be tested according to a preset sampling frequency; step 6, repeating the steps 2-5 to carry out a cyclic test, wherein the cumulative operation time is greater than or equal to 100 hours; sampling is conducted after circulation, and the coercive force change rate delta Hcj and the residual magnetism change rate delta Br of the sample are measured. According to the invention, whether irreversible performance degradation of the magnet occurs can be determined.

The invention relates to the technical field of power cycle tests, in particular to a test method for automatically interspersing static characteristic tests in a power cycle test, which comprises the following steps of: 1, performing a power cycle test on a tested sample, and judging the aging degree; counting the cycle number of the power cycle test; 2, judging whether the cycle number of the power cycle test reaches a preset value N or not, if yes, pausing the power cycle test, waiting for state recovery, and executing the step 3; if not, continuing to execute the step 1; 3, stopping the power cycle test, and entering a static parameter test; 4, all interspersed static parameter tests are finished, a power cycle test is recovered, and an interspersed transient thermal test is carried out; 5, judging whether a stop condition is triggered or not, and if yes, executing the step 6; if not, executing the step 1; and step 6, ending the loop test. Static parameter testing can be interspersed in power cycle testing, and the overall reliability of the tested sample is improved.

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 an automatic test method for a co-driver screen of an intelligent cabin, and the main design conception of the method is that the screen ID number of the co-driver screen is added in an ADB instruction, analog simulation test operations such as clicking and sliding of the co-driver screen are realized, whether the response on the interface of the co-driver screen is correct or not is judged in combination with a screenshot recognition mode, and the test accuracy of the co-driver screen is improved. A loop test mechanism is formed by links such as ID acquisition, ID addition and simulation operation screenshot, so that reliable detection is realized for copilot screen functions, especially accidental problems; furthermore, the process related instruction can be packaged into an executable file, so that efficient, convenient and fast automatic testing of the co-driver screen interface is realized. According to the method, the functions of the co-driver screen in the vehicle are tested in a lightweight automatic test mode, the cost investment of test equipment is greatly reduced, the test efficiency of the co-driver screen is improved, and the stability of software is effectively improved.

The utility model relates to the technical field of getter testing, in particular to an automatic cycle testing system for a getter pump. The system comprises a vacuum chamber, a vacuumizing system, a baking temperature control system, an activation power supply, a cooling device and an air supply system, wherein valves, instruments, a heating power supply, a cooling power supply and an activation power supply on a connecting pipeline are connected with a data acquisition system and an automatic control system; besides, the vacuum chamber is divided into a Pm chamber and a Pg chamber by an orifice plate, the Pm chamber is connected with an air supply system, a to-be-detected getter pump is arranged in the Pg chamber, a valve switch in the system is controlled through a data acquisition system and an automatic control system, and circulation of heating activation, low-pressure air chamber pressure adjustment, cooling and air suction test is automatically completed. Meanwhile, the pressure of the Pm chamber and the pressure of the Pg chamber are recorded, and the inspiration rate, the inspiration capacity and corresponding curves are automatically calculated. According to the detection system and method, automatic control of multi-cycle inspiration testing can be realized, and the testing efficiency and the testing accuracy are improved.

The utility model provides an anti-fatigue testing device for a diamond compact, which relates to the technical field of diamond testing and comprises a bottom plate and a motor, the top end of the bottom plate is fixedly connected with a supporting assembly, the supporting assembly comprises a supporting column, the bottom end of the supporting column is fixedly connected onto the bottom plate, and the top end of the bottom plate is fixedly connected with a limiting frame. A supporting plate is fixedly connected to the side, away from the limiting frame, of the top end of the bottom plate, a circulation testing assembly is fixedly connected to the top end of the supporting assembly, and a pushing assembly is fixedly connected to the outer side of the bottom plate, so that the motor drives the driving chain wheel to rotate, automatic circulation testing of the testing balls is achieved, and it is ensured that the testing balls stably slide on a specified route; inconsistency of test results caused by factors such as skill level and experience of operators is avoided, and the problem of inaccurate impact times caused by continuous bounce of the test ball is avoided by ensuring that the test ball is in stable contact with the surface of the diamond compact.

This invention discloses a method for testing the anti-coking performance of diesel engine oil in turbochargers. The main design concept of this invention lies in designing a full-process test based on engine operation, including high smoke conditions, low temperature and low load conditions, high temperature and high load conditions, and multiple rounds of cyclic testing to simulate the high and low temperature fluctuations of engine oil. This achieves a comprehensive assessment of the impact of engine oil performance changes on turbocharger coking. Furthermore, engine oil sampling is performed at predetermined stages to monitor relevant physicochemical properties. Further, the turbocharger is disassembled and evaluated after the test procedure, enabling an accurate evaluation of the engine oil's anti-coking performance. This facilitates the matching development of engine oils during engine development and avoids problems such as turbocharger damage and reduced power caused by using unsuitable engine oil. This invention comprehensively covers soot dispersion, high-temperature shear resistance, and temperature oscillation, providing significant guidance for the comprehensive evaluation of engine oil's anti-coking performance.

The invention relates to the technical field of transmission testing, in particular to a commercial vehicle AMT (automated mechanical transmission) brake performance and service life testing method, which comprises the following steps of: 1, mounting an AMT gearbox on a rack meeting experimental conditions, and connecting the AMT gearbox with a motor through a clutch; 2, building a test model through MATLAB Simulink, generating a C code, integrating underlying software by using HighTec, generating an executable file, and flashing the executable file into a TCU (Transmission Control Unit); 3, the upper computer interacts with the TCU, and data representing the test process and result are sent through a CAN bus and displayed on an interface of the upper computer. According to the method, MATLAB Simulink is used for building a test model and generating a C code, an executable file is produced after integration, and automatic testing is achieved through CAN signal and UDS interaction; the TCU controls the electromagnetic valve through the wiring harness, so that the execution mechanism is controlled through compressed air to achieve separation and combination of the clutch and braking of the TB, the TCU autonomously executes instructions and performs cyclic testing, manual intervention is not needed, the single-time testing time is remarkably shortened, and then the testing efficiency is improved.

The utility model discloses a self-adaptive force stabilizing device for characterizing a mechanoluminescence cycle process, and belongs to the technical field of material testing. According to the device, collaborative operation is achieved through a reciprocating testing mechanism and a force loading mechanism which are in linkage design; the reciprocating testing mechanism drives a lead screw transmission assembly through a servo motor to drive a single-axis moving platform, a pressure digital display and a material to achieve reciprocating friction in the y-axis direction; the force loading mechanism pulls a sliding platform to slide on a sliding rail through a spring, a round-bottom quartz tube is arranged at the end of the force loading mechanism and is in point contact with a sample of a pressure digital display accessory, and when the sample is slightly abraded to cause position change, the spring dynamically compensates pressure loss to ensure that force loading in the x-axis direction is constant. An optical fiber is integrated in the round-bottom quartz tube to synchronously collect mechanoluminescence signals. The device solves the problem of force attenuation in the existing cycle test, and is beneficial to systematic research on the cycle characteristics of the mechanoluminescent material.

The invention relates to the technical field of structural design optimization, in particular to a structural parameter optimization design method and system based on sheet metal parts. The method comprises the following steps of calculating a normal included angle field by extracting a surface patch normal and a surface center coordinate of a CAD model, identifying a rib position transition area, and performing arc length calculation, curvature point analysis, step jump judgment and transition curve fitting based on a rib rotation angle coefficient. And the fatigue performance and the structural design optimization effect of the fitted curve are verified through a load cycle test. According to the method, the transition rib position area of the sheet metal part is accurately recognized through the normal included angle field, fine parameterization of the curve form is achieved in combination with the rib rotation angle coefficient, then step jump analysis and fitting are carried out, the stress streamline and structure transition design is optimized, the improvement effect of the method on the fatigue performance is verified through a load cycle test, and therefore the damage risk is effectively reduced, and the fatigue performance of the sheet metal part is improved. And the service life and reliability of the sheet metal part under the repeated load are improved.

The invention discloses a Solana chain program transaction sequence dependence defect detection method based on fuzzy testing and symbolic execution, and the method takes an ELF executable file of a Solana chain program as an input, and takes a detected transaction sequence dependence defect report as an output; in order to detect the transaction sequence dependency defect in the program on the Solana chain, the method is based on the thought of fuzzy testing and symbolic execution, the program on the input Solana chain is tested and analyzed, an initial block chain simulation state and a seed transaction are generated from an executable file of the program, and then loop testing is carried out. And when the test is finished, outputting detailed reports of all defects found in the process. The method provided by the invention has the advantages of effectiveness and high efficiency, and can more effectively discover the transaction sequence dependency defect in the Solana chain program.

Disclosed are a method and system for verifying a low-frequency oscillation damping control effect of a governor power system stabilizer (GPSS), relating to the technical field of power systems. The method includes: selecting a wiring working condition for a fault-free disconnection test, and constructing a unit test working condition; performing the fault-free disconnection test on an outgoing line of a power plant, and collecting an electromagnetic power fluctuation recording curve; and comparing low-frequency oscillation damping effects under different GPSS settings, evaluating the effects, and performing a cyclic test. A success rate of the test is increased, safety of the test is improved, and the overall stability and anti-oscillation capacity of the system are improved in the disclosure.

The utility model discloses an AC power cycle test circuit and device, and relates to the technical field of electronics. The circuit comprises an IGBT and a to-be-tested device, one end of the to-be-tested device is electrically connected with an emitter of the IGBT, and a collector of the IGBT and the other end of the to-be-tested device are electrically connected with two ends of a voltage source respectively; wherein the to-be-tested device comprises three to-be-tested units which are connected in parallel, and each to-be-tested unit comprises two switch tubes which are connected in series; the collector and the emitter of the switch tube of the upper bridge arm of one to-be-measured unit are connected with the two ends of the measuring current source; the series connection end of the switch tube of the upper bridge arm and the switch tube of the lower bridge arm of each to-be-tested unit is electrically connected with a load, and the other end of the load is grounded. The aging of the device can be monitored on line, so that the test result for evaluating the to-be-tested device is more accurate.

The invention discloses an aging seat for an aging cycle test, which comprises an upper gland and a base, a placement groove is formed in the upper gland, the base is positioned at the bottom of the upper gland, buffer rods are mounted at four corners of the base, the tops of the buffer rods are connected into the upper gland, a clamping pin group is arranged on the base, and a clamping pin is arranged on the clamping pin group. The top of the clamping needle set abuts against the interior of the upper gland, and side limiting clamps are arranged on the two sides of the upper gland. Through cooperative use of the upper gland, the base and the clamping needle group, a transmission part corresponding to a to-be-tested electronic device is put in, the to-be-tested electronic device can be conveniently and quickly mounted and taken out, through cooperative use of the base, a bottom connecting rod and an inserting rod, and through cooperative use of a side guide clamp, an upper guide clamping rod, a trapezoidal seat and a lower guide clamping rod, the to-be-tested electronic device can be conveniently and quickly mounted and taken out. And the unique accuracy of the upper gland on the base is facilitated, and the problem of low test efficiency of the existing aging test equipment caused by inconvenient installation of the to-be-tested device on the aging seat is solved.

The invention discloses a multi-working-condition low-loss acceleration power cycle testing device and a control method, and belongs to the technical field of power equipment testing. According to the invention, the inductance data of the inductance module, the power device voltage data output by the to-be-tested power device module and the load voltage data output by the load converter module are interacted, and different power device working conditions are combined; on-off control signals of the to-be-tested power device module and on-off control signals of the load converter module can be dynamically generated, so that acceleration power cycle testing under multiple working conditions is realized; through the connection of the load converter module, the to-be-tested power device module and the interactive inductor module, the energy in the acceleration power cycle test process is cyclically exchanged between the load converter module and the to-be-tested power device module, so that the energy loss of the acceleration power cycle test is reduced.

The present invention relates to a test device for testing the performance of a battery and, more specifically, to a cycling test device for testing the performance of a battery by repeatedly charging and discharging the battery within a predetermined temperature for a long time. An embodiment of the present invention may provide a cycling test device comprising: a main line along which a compressor, a condenser, and an evaporator are sequentially connected to circulate a refrigerant; a heater for heating air cooled through the evaporator; a hot gas mixing line bypassed from the main line between the compressor and the condenser and connected to the main line between the condenser and the evaporator, in order to increase the temperature of the evaporator and limit the output of the heater, such that the hot gas discharged from the compressor is mixed with the low-temperature and low-pressure gas supplied from the condenser to the evaporator; and a controller for controlling the amount of hot gas supplied to the evaporator through the hot gas mixing line.

The invention discloses an in-situ thermogravimetric and corrosion thermal cycle testing device, which relates to the technical field of thermal cycle testing devices, and comprises a base, a reaction tube, a placement table and a heating movable furnace, the reaction tube is horizontally arranged, and the axial direction of the reaction tube is parallel to the length extension direction of the base; the object placing table is positioned in the reaction tube and is used for fixing a sample to be tested. The heating movable furnace is arranged on the base in a sliding mode in the axial direction of the reaction tube, the heating movable furnace can enclose or be separated from the reaction tube when sliding in a reciprocating mode, the heating movable furnace is provided with a heating wire, and when the heating movable furnace enclose the reaction tube, the heating wire can heat a sample in the reaction tube. According to the invention, the reaction tube is horizontally arranged, and the heating movable furnace slides along the axial direction of the reaction tube to enclose or separate from the reaction tube, so that a test mode that a sample is static and a temperature field is movable is realized; the position of the sample is always fixed, the switching between the high-temperature heating area and the cooling area is completed only by sliding and heating the movable furnace, and the sample testing precision is high.

The utility model discloses a power semiconductor device cycle test fixing device, which comprises a fixing platform, and the fixing platform is provided with a placing groove and an insulating base arranged on the periphery of the placing groove in a surrounding manner. A liquid inlet and a liquid outlet are formed in the placement groove, so that a cooling medium in the placement groove circularly flows; when the to-be-tested device is placed in the placing groove, a gap for a cooling medium to enter is formed between the bottom and the peripheral side of the to-be-tested device and the inner wall of the placing groove; a plurality of conductive connecting sheets are arranged on the insulating base, each conductive connecting sheet comprises a first end and a second end, the first ends of the plurality of conductive connecting sheets are used for being electrically connected with different electrode ends on a to-be-tested device respectively, and the second ends of the plurality of conductive connecting sheets are used for being electrically connected with different signal ends of a test system respectively. According to the fixing device, the heat dissipation condition of the device to be tested in practical application can be simulated, and the performance and service life characteristics of the device can be reflected more truly.

The present application relates to the technical field of plate performance testing, and particularly relates to a kind of plate edge durability test method;It comprises the following steps: cutting plate sample into standard size test piece;Using thermal mechanical analyzer respectively test the linear expansion coefficient of test piece edge material and base material;The test piece after processing is placed in environmental test chamber and is subjected to cyclic test;Test piece is fixed on load testing device, and constant load is applied along the direction perpendicular to the edge interface of plate plane;Using flatness tester to measure the overall warping of test piece, compare with the warping data before testing, calculate the warping change, evaluate the actual effect of plate balanced laminating process on preventing warping after edge sealing;Using weighted scoring method to calculate the comprehensive score of edge durability;Realize that the long-term durability of plate edge sealing under complex working conditions can be comprehensively and accurately evaluated, and provide scientific and comprehensive technical support for edge sealing process optimization, material selection and structure design.

The utility model discloses a constant speed drive shaft periodic cycle test bench, which comprises an installation platform, a swing device, a lifting device and a transverse distance adjusting device, the swing device, the lifting device and the transverse distance adjusting device are arranged on the installation platform, the swing device comprises a left swing device and a right swing device which are arranged on two sides of the lifting device, and the left transverse distance adjusting device is connected with the left swing device. The left transverse distance adjusting device is connected with the left swing device, the right transverse distance adjusting device is connected with the right swing device, the left swing device comprises a loading gear assembly, the right swing device comprises a driven gear assembly, and the loading gear assembly, the driven gear assembly and the lifting device are all connected with clamps. And a clamp on the lifting device is connected with clamps on the loading gear assembly and the driven gear assembly through a constant-speed driving shaft. According to the periodic cycle test stand for the constant-speed driving shaft, the transverse distance adjusting device is arranged, so that the periodic cycle life test requirements of driving shafts with different lengths can be quickly and accurately met, and the flexibility and the efficiency of the test stand are improved.

A system and method are disclosed to test signal paths within sensor signal channels by providing an additional signal channel having testing means. The additional signal channel has a test signal generator, a test signal evaluator, and a signal path that is provided in parallel to existing signal paths within the sensor. Signal paths between each sensing element and each output are manipulated by input and output path couplers so that sense signals always reach the correct outputs but the intermediary signal path(s) may be changed according to a self-test protocol. In particular, the signal path(s) may be selected for cyclical testing. The signal path under test is subjected to test signals from the test signal generator which are then evaluated by the test signal evaluator for correctness, and faults signaled. The test signals may be selected to test each signal processing function in the signal path.

A cryogenic testing system, method, equipment, and medium for aircraft fuel servo valves are disclosed, relating to the field of testing systems. The aircraft fuel servo valve cryogenic testing system maintains the medium at a preset ambient temperature by setting up an ambient temperature fuel tank. In conjunction with a high-pressure pump group and a cryogenic heat exchanger arranged sequentially along the fuel supply pipeline, only the medium flowing to the test station is pressurized and deeply cooled online. This eliminates the need to cool all the medium in the ambient temperature fuel tank, significantly reducing cooling energy consumption and cooling time. Simultaneously, a temperature return control loop on the return pipeline can raise the temperature of the cryogenic, high-pressure medium flowing out after the test to ambient temperature before returning it to the ambient temperature fuel tank, preventing the backflow of the cryogenic medium from disturbing the temperature field within the tank. This effectively solves the problems of large temperature fluctuations, low testing accuracy, and poor continuous operation efficiency in traditional overall cryogenic cyclic testing. It can stably maintain the extreme low-temperature conditions required for testing for extended periods, improving the accuracy and continuous operational stability of aircraft fuel servo valve cryogenic testing.

The invention provides a dual-temperature-zone test box for predicting battery cycle life failure, which comprises a test box assembly, an explosion door assembly, a test inner box assembly, a dual-temperature-zone door assembly, an electrical assembly and an operation control panel assembly.The dual-temperature-zone test box has the beneficial effects that the equipment is simple to operate, is provided with a touch display screen and an automatic control system, is convenient to use, and is suitable for popularization and application. High temperature and low temperature can be quickly switched, so that the test period is greatly shortened, and the working efficiency is improved; through the high-precision temperature sensor and the controller, the environmental test box can ensure the accuracy of temperature control; the equipment can also store multiple groups of test programs, so that a user can conveniently perform repeated tests, and the test efficiency is improved; long-time loop testing is not needed, so that the time cost is saved; according to the method, a specific battery cycle failure problem point can be locked, and compared with the prediction of the cycle life, the battery design can be optimized aiming at the specific problem point, so that the research and development period is greatly shortened.