3130 results about "Test chamber" patented technology

The invention discloses a constant-temperature and constant-humidity test box temperature control system based on a multistage PID algorithm and a control method thereof. The constant-temperature and constant-humidity test box temperature control system comprises an environmental parameter detection module, an in-box parameter detection module and a multistage PID controller, wherein the environmental parameter detection module is used for collecting temperature, humidity and air pressure data outside a test box in real time; the in-box parameter detection module is used for collecting multi-dimensional environmental parameters inside the test box; when the failure of any sensor is detected, starting a fault self-diagnosis module, replacing the data of the failure sensor with a data interpolation method of a side sensor, and recording the deviation compensation amount at the same time. A multi-stage PID control architecture is adopted, and feedforward compensation, parameter adaptive optimization and fault redundancy strategies are combined, so that high-precision and anti-interference control of the temperature and humidity of the test box is realized.

The invention relates to the technical field of fault diagnosis, in particular to a fault self-diagnosis system and method for a high and low temperature aging test chamber of a storage chip and computer equipment. The temperature control abnormal index is obtained through the data of the temperature control system sensor, early warning can be performed when the temperature control system has abnormal fluctuation, the performance evaluation basis of the air circulation system is provided by the air system efficiency coefficient, the heating efficiency and the refrigeration coefficient are obtained through the data of the heating and refrigerating system sensor, and the performance of the heating and refrigerating system is evaluated. An electrical stability index is obtained through data of a test system sensor, the operation stability of an electrical system is evaluated, the stability of the electrical system is detected in time, and a fault probability index is obtained through a system entropy increase rate, the electrical stability index, a thermal coupling factor, a wind system efficiency coefficient and a temperature control abnormal index. Therefore, the stability and the reliability of the equipment can be improved, the maintenance cost can be reduced, the use efficiency of the equipment is improved, and the accuracy and the safety of test results are ensured.

The invention relates to the field of environment simulation control, in particular to an environment simulation method and system for a high and low temperature test box. The method comprises the following steps: acquiring initial state monitoring parameters of a high and low temperature test box, performing regional environment parameter division and time point gradient change fitting, and constructing a plurality of regional temperature and humidity gradient change curves; identifying a test object in the high and low temperature test box; performing transient thermal change limit evolution excavation on the test object according to the plurality of regional temperature and humidity gradient change curves to generate a transient thermal change limit curve of the current test object; acquiring a preset test box environment simulation log, performing global temperature change cross period optimization according to the transient thermal change limit curve of the current test object, and constructing a global temperature change optimization simulation period; and executing environment simulation control operation according to the global temperature change optimization simulation period, and collecting high and low temperature simulation environment monitoring data. According to the invention, quick-response, accurate and stable environment simulation control is realized.

The invention relates to the technical field of DC / DC power supplies, and discloses a DC / DC power supply function parameter testing method and system and computer equipment, and the method comprises the steps: injecting a preset disturbance signal into an input end of a tested DC / DC power supply through a signal conditioning circuit, and obtaining output voltage response data and output current response data; adopting a dynamic multi-parameter test system and collecting target test parameter data; calculating a characteristic parameter set, and executing voltage-temperature control model predictive control analysis to obtain a control parameter sequence; and controlling the power output value of the electric heating wire, the rotating speed value of the heat dissipation fan and the position value of the electric push rod in the test box body to obtain an intelligent adjustment test environment and generate an aging test result and a test strategy adjustment instruction, thereby overcoming the problem of parameter detection blind areas in a traditional test method, and improving the test accuracy even under the condition that the output voltage is accurately matched with the set value. And the power supply performance abnormity can be effectively identified, and the reliability and accuracy of the test are obviously improved.

The invention belongs to the technical field of coal field fire evolutionary analysis, and particularly provides a visual coal field fire evolutionary process analog simulation test device and method. The test device comprises a test bench, a physical similarity model, a fiber bragg grating temperature and stress integrated monitoring system, a multi-gas monitoring system, an image and video monitoring system and a computer analysis system. A plurality of opening frames are sequentially fixed to form test box bodies, the physical similarity model is arranged in the test box bodies, the inclination angle of the test box bodies is adjusted through an inclination angle adjusting mechanism, and the gas supply system and the ignition system are connected between the test box bodies. The fiber bragg grating temperature and stress integrated monitoring system, the multi-gas monitoring system and the image and video monitoring system are respectively in signal connection with the computer analysis system. According to the invention, visualization of coal field fire evolution processes under different conditions can be realized, and real-time monitoring of change rules of a temperature field, a seepage field and a fracture field in the coal field fire evolution processes under different conditions can be realized.

The invention relates to the technical field of rock mass testing, in particular to a tunnel water-rich fault fracture zone area loading simulation test device and method.The tunnel water-rich fault fracture zone area loading simulation test device comprises a test box, and a partition plate is arranged in the test box; the partition plate divides the test box into a first area and a second area, and the second area is filled with a rock-soil sample; a lateral loading structure; a vertical loading structure; the simulated fault test structure comprises a mounting frame fixedly connected to the partition plate, a driving structure and a simulated fault unit, one end of the driving structure is hinged to the mounting frame, and the other end of the driving structure is connected with the simulated fault unit; the fault simulation unit is hinged to the mounting frame and used for simulating an adjustable fault, and the technical problems that an existing test device cannot dynamically adjust the fault fracture width and the dip angle according to the load effect and cannot perform real-time coupling simulation on a hydrological seepage field are solved.

The invention relates to the technical field of tensile tests, and discloses a building sealant stretching performance test device, which comprises a test box, a first clamp, a loading block, a linear driver and a driving mechanism, a door plate is mounted on the front of the test box; the first clamp is installed at the top in the test box, the loading block is arranged in the test box, located below the first clamp and driven by the linear driver to move up and down, a through loading channel is formed in the loading block, and a cylinder is arranged in the loading channel and driven by the driving mechanism to rotate; a through assembly channel is formed in the cylinder body, and a transversely-arranged guide rail body is installed in the assembly channel. According to the invention, by carrying out stretching, torsion, inclined stretching, tearing stretching, winding stretching and testing in a low-pressure environment on the sealant, the mechanical properties of the sealant under complex working conditions can be comprehensively evaluated, the testing precision and reliability are improved, the actual engineering requirements are met, and meanwhile, the testing safety and environmental protection property are ensured.

The invention discloses a high and low temperature environment test box thermal load verification method and system, and relates to the technical field of environment test, and the method comprises the steps: initializing a target temperature range, a cooling rate, a heating rate, a preset temperature fluctuation range and a thermal load demand, and carrying out the preliminary setting of a thermal load; adjusting a liquid nitrogen adjusting unit in real time by adopting a dynamic optimization algorithm, and adjusting internal thermal load parameters of the test box under the condition of no external thermal load to obtain reference data; based on a self-adaptive control algorithm, dynamically adjusting the matching relationship between the liquid nitrogen release rate and the internal thermal load of the test box, and verifying the operation state of the test box under different thermal load conditions; a self-adaptive thermal load adjusting algorithm is adopted, the relation between the liquid nitrogen release rate and thermal load change is adjusted in real time, and thermal load verification of the test box is carried out according to the states under different load conditions. According to the invention, through the dynamic heat exchange coefficient model and the high-order injection optimization algorithm, the thermal load verification precision of the high and low temperature environment test box is improved.

The invention discloses a multi-dimensional environment coupling aging test box and a self-adaptive control method thereof.The multi-dimensional environment coupling aging test box comprises a box body, a multi-dimensional environment coupling system and a self-adaptive control system.The box body is internally provided with a test cavity, the multi-dimensional environment coupling system is arranged in the test cavity, and the self-adaptive control system is arranged in the test cavity; and the multi-dimensional environment coupling system is connected with the adaptive control system. A multi-physics coupling environment is constructed by integrating four environment simulation modules of temperature and humidity, illumination, vibration and gas. The sensor group acquires environmental parameters (temperature and humidity, irradiance, acceleration and gas concentration) and state data of a test object in real time, and transmits the environmental parameters and the state data to the data processing unit. Based on a multi-physics field coupling model (such as finite element analysis or an empirical formula), the contribution degree of each environmental factor to material aging is calculated, a dynamic control instruction is generated, output parameters of each module are synchronously adjusted through an execution mechanism, and closed-loop control over environmental conditions is achieved.

The invention discloses a multi-dimensional rapid evaluation method for snow-melting agent corrosion resistance of stainless steel, and relates to the technical field of stainless steel performance evaluation.The multi-dimensional rapid evaluation method comprises the steps that sodium chloride, calcium chloride and magnesium chloride are weighed by mass and dissolved in deionized water, acetic acid and sodium hydrogen sulfite are added after dissolution, and the pH value is adjusted to 4-6; performing potentiodynamic polarization scanning and electrochemical impedance spectroscopy testing on the stainless steel sample to obtain pitting potential and impedance modulus; the method comprises the following steps: placing a stainless steel sample in a cyclic corrosion experiment box, carrying out a corrosion experiment under the conditions of controlling the cyclic temperature change of an environment temperature and periodically carrying out cyclic switching of a spraying mode, a humid mode and a drying mode, taking out the sample every set time, and measuring the corrosion rate and the maximum pitting depth; and according to the pitting potential, the impedance modulus, the corrosion rate and the maximum pitting depth, carrying out graded judgment on the corrosion resistance of the stainless steel. According to the method, the corrosion resistance of the stainless steel can be accurately evaluated in a short time.

The invention relates to the technical field of battery testing, and provides a flow battery bipolar plate flow channel diversion performance testing device, which comprises an intelligent testing galvanic pile, which is composed of a plurality of detachable flow channel units, each flow channel unit comprises a bipolar plate and two flow channel frames, the flow channel frames adopt a modular design, and the flow channel units are connected with the intelligent testing galvanic pile; a plurality of micro pressure sensors, temperature sensors and flow sensors are embedded in the shell; the intelligent liquid path system comprises a plurality of independent liquid path circulating units, and each unit is composed of a liquid tank, an intelligent liquid pump, a liquid supply pipeline and a liquid return pipeline; a plurality of independent test chambers are arranged in the multifunctional shell, and a temperature and humidity control system and an intelligent drainage system are arranged in the shell; and the data acquisition and analysis system consists of a high-performance computer, a data acquisition card, a signal amplifier and analysis software. The problems that in the prior art, the local flow characteristic of the electrolyte on the surface of the carbon felt is difficult to accurately evaluate, and the requirement of optimizing flow channel design on refined data cannot be met are solved.

The invention discloses salt spray environment test equipment for environment test, and belongs to the technical field of environment test. The device comprises a test box, a spraying assembly is installed in the test box, a plurality of fans are fixedly installed in the test box, a plurality of heaters are fixedly connected in the test box, a test rack is placed in the test box, a clamping assembly is installed on the test rack, and a simulation assembly is further installed on the test rack. The simulation assembly comprises a shielding assembly, an impact assembly and a friction assembly, the shielding assembly comprises a supporting frame, and a hydraulic cylinder is fixedly installed on the supporting frame. In the circulating corrosion test process, the hydraulic cylinder can be started, atomized saline water is prevented from falling on a sample, and the shielding time can be manually set, so that a control test is formed, that is, one part of the sample is shielded, the other part of the sample is not shielded, and different shielding time can be set on different samples, so that the accuracy of the control test is improved. And test results are enriched.

The invention relates to a device and a method for measuring concrete volume change caused by long-term neutron irradiation, the device comprises a neutron emitter and a neutron receiver which are arranged in a laboratory in a matching manner, a test concrete test piece is fixed between the neutron emitter and the neutron receiver, and the test concrete test piece measures the temperature through a temperature detector; a contrast concrete test piece is arranged in the test chamber, a collection mold wraps the outer side of the contrast concrete test piece, and a condensation pipe, a water vapor collector and a high-precision electronic scale are arranged. The method comprises the following steps: 1, measuring the overall expansion rate of a concrete test piece through a strain measurer; 2, testing the volume change of the concrete test piece in the environment; 3, calculating the volume change rate of the concrete caused by neutron radiation by combining the thermal expansion coefficient of the concrete and the drying shrinkage of the concrete; and 4, the relationship between the volume expansion rate of the concrete and the neutron irradiation dose is tested, and the relationship between the volume change rate of the shielding concrete of the engineering structure and the time is speculated, so that the safety of the nuclear engineering structure is ensured.

The invention discloses an electromagnetic valve vibration fatigue test device and a failure judgment method, and relates to the technical field of electromagnetic valve tests.The electromagnetic valve vibration fatigue test device comprises a test box, a conveying mechanism, a balance weight mechanism, a vibration table, an opening and closing detection mechanism and a clamping detection mechanism; the front end and the rear end of the top in the test box are fixedly connected with counterweight mechanisms, the bottom in the test box is fixedly connected with a vibration table, the right end in the test box is fixedly connected with an opening and closing detection mechanism, and the top of the vibration table is fixedly connected with a clamping detection mechanism and a conveying mechanism; the inlet and outlet pressure of the detected electromagnetic valve is detected through a sensor, failure judgment of the electromagnetic valve is achieved, then the pressure is adjusted through the combination mode of low-speed precise conveying of a piston cylinder and high-speed large-flow conveying of an external fluid conveying box, periodic fluid pressure fluctuation is applied while vibration is conducted, and the real load of the electromagnetic valve is simulated. And the superimposed effect of mechanical vibration and fluid impact is synchronously tested.

The invention relates to the technical field of medical cell culture, and discloses a medical experiment cell culture device which comprises a culture box, an electric push rod is fixedly connected to the lower surface of the culture box, a supporting plate is fixedly connected to the output end of the electric push rod, and a first connecting column is fixedly connected to the outer wall of the supporting plate; a first partition plate is fixedly connected to the inner wall of the incubator, a sliding groove is formed in the first partition plate, the outer wall of the first connecting column is slidably connected to the inner wall of the sliding groove, and a movable frame is rotatably connected to the outer wall of the first connecting column. The electric push rod is started to drive the supporting plate to move up and down, and then the connecting column drives the moving frame to move synchronously. The movable frame drives the transmission plate to move upwards, the frame plates at the two ends are pulled or pushed to move relatively through the fixing columns, then the closing plate is driven to be opened and closed, meanwhile, the placing frame can be moved into a test box or stored into a culture box, operation convenience and efficiency are improved, and the risk that the culture environment is polluted by manual taking is avoided.

The invention discloses an ultralow-temperature high-pressure environment material mechanical property test system and method, the test system comprises a medium circulation system and a cold source supply system, the medium circulation system comprises a heat exchanger tube pass, a circulation pump and a test box, the heat exchanger tube pass, the circulation pump and the test box are connected in sequence, and a medium outlet of the test box is connected with a blow-down pipe; the cold source supply system comprises a heat exchanger shell pass, a first valve bank, a second valve bank, a gas-liquid mixer, a liquefied gas pump, a normal-temperature gas storage tank and a first liquefied gas storage tank, the heat exchanger shell pass accommodates the heat exchanger tube pass, an outlet of the first liquefied gas storage tank is connected to the first valve bank and the liquefied gas pump, and the liquefied gas pump is connected to the second valve bank. The first valve group and the second valve group are both connected to an inlet of the gas-liquid mixer, the second valve group is further connected to a pipeline where the circulating pump is located, an outlet of the gas-liquid mixer is connected to one end of the heat exchanger shell side, and the other end of the heat exchanger shell side is connected to the blow-down pipe through a discharge pipeline.

According to the cold region slope multi-field coupling effect simulation test device and method, the device is composed of a freeze-thaw environment test box, a slope model, an anchor rod axial loading system, a crack water injection assembly and a multivariate data monitoring system, and the multi-physical field coupling effect of freeze-thaw cycle, crack water permeation and long-term creep can be simulated. By dynamically adjusting the temperature gradient and graded loading parameters, data of a stress field, a temperature field and a displacement field can be collected in real time, the influence of different freeze-thaw conditions and creep drawing loads on a slope damage mechanism can be analyzed, a key test means is provided for revealing the strain rate effect, the aging deformation characteristics and the instability criterion of the slope in the cold region, and the test efficiency is improved. The method has an important guiding value for stability evaluation and disaster prevention and control of the cold region slope engineering.

The invention discloses a control method of a precise constant-temperature test chamber, and relates to the field of technical temperature control and automatic tests.The method adopts a control system of the precise constant-temperature test chamber for operation, and comprises a temperature control module, a test process automation module, a linkage coordination module and a data feedback diagnosis module. The control method of the precise constant-temperature test box comprises the following steps: detecting temperature data in the test box in real time through a temperature sensor, and transmitting the data to a temperature control module; according to the preset target temperature and the current temperature data, a segmented temperature rise or temperature drop strategy is adopted, and automatic switching between low-speed temperature change and high-speed temperature change is achieved; in the temperature change process, the current test process parameters are detected through a judgment module, a parameter linkage formula between the temperature and the test steps is established, and temperature control parameters are subjected to linkage adjustment; according to the invention, the limitation caused by independent operation of the traditional temperature control and test process is solved.

The invention relates to the technical field of air supply unit testing of an air suspension, in particular to air supply unit testing equipment and a testing system of the air suspension, and the testing equipment comprises a high-low temperature damp-heat alternating testing box, four simulation air spring load devices, an industrial personal computer and a first testing air path; the simulated air spring load device is used for simulating the load of an automobile body on the air spring; the gas supply unit is used for testing in a test room of the high-low temperature damp-heat alternating test box, and the high-low temperature damp-heat alternating test box, the gas supply unit and the first test gas path are all controlled by the industrial personal computer; the first test gas circuit is used for testing the gas supply unit. According to the invention, the air supply unit to be tested of the air suspension is tested in a simulated extreme environment, and the weight is increased or decreased to simulate the load of the vehicle body on the air spring, so that the core capabilities of pressure-flow control, environmental adaptability, reliability and the like of the air supply unit are effectively and systematically verified. The verification of the air supply unit is directly related to the safety, comfort and durability of the automobile.

The invention discloses a salt spray test box, which belongs to the technical field of corrosion resistance testing, and comprises a salt spray test box body, and an anti-blocking mechanism is arranged in the salt spray test box body; according to the salt spray test box, the anti-blocking mechanism is arranged, so that the problem that the salt spray test box is easily blocked by salt particles in the long-time operation process is effectively solved, the anti-blocking mechanism adopts matched work of a cleaning brush, a scraper blade and a reset spring, continuous cleaning of a filter screen and a conveying pipe is ensured, and specifically, after a salt-water mixture enters the conveying pipe, the salt-water mixture is prevented from entering the conveying pipe; the transmission system drives the support to rotate, the support rotates to drive the reset spring to rotate and push the supporting plate and the cleaning brush to move, the cleaning brush is tightly attached to the surface of the filter screen, automatic cleaning is carried out, undissolved salt particles are prevented from entering the conveying pump and the spray head, and it is ensured that salt water can be evenly and cleanly conveyed to a test sample; and equipment faults caused by salt particle blockage are avoided.

The utility model relates to the field of test cabins, and discloses a live-action simulation test cabin for a head-up display device, which comprises two baffle plates, the two baffle plates are respectively and rotatably connected to the front side of the outer wall of a test cabin body through hinges, a windshield is arranged in the test cabin body, a first guide rail is fixed on the inner bottom surface of the test cabin body, and a second guide rail is fixed on the inner bottom surface of the test cabin body. A second guide rail is fixed to the top face of a sliding block of the first guide rail, a connecting plate is fixed to the top face of a sliding block of the second guide rail, and a head-up display device body is detachably arranged on the top face of the connecting plate. According to the utility model, through the first guide rail, the second guide rail and the connecting plate, front-back and left-right position adjustment of the head-up display device body is facilitated, and the position of the head-up display device body can be changed according to different test requirements and simulation conditions so as to adapt to various complex test scenes; therefore, the accuracy and the flexibility of testing the head-up display device body are improved.

The invention relates to the technical field of programmable multi-mode integrated control, in particular to an integrated control platform of a programmable multi-mode environmental test chamber, which comprises a multi-mode sensing unit, a dynamic logic reconstruction unit, a virtual verification sandbox unit and a feedback optimization unit, the multi-modal sensing unit synchronously collects parameters such as temperature and humidity to generate environment data streams, the dynamic logic reconstruction unit analyzes parameter interaction by using a long-short-term memory neural network in combination with a double-attention mechanism to generate an optimal control logic chain, the virtual verification sandbox unit constructs digital twin pre-execution control logic, and the virtual verification sandbox unit constructs digital twin pre-execution control logic. The physical actuator is activated after the error rate is ensured to be lower than a preset threshold value, the feedback optimization unit dynamically adjusts the function block selection weight according to the actual response time delay and the energy consumption deviation, and a high-precision and low-energy-consumption intelligent control scheme is provided for the reliability test of high-end products in the fields of aerospace, electronic components and the like.

The invention discloses a hot chamber high-voltage electrical penetration assembly composite stress aging state evaluation method and a test device, and relates to the technical field of electrical equipment aging tests, and the method specifically comprises the steps: synchronously obtaining the leakage current, the partial discharge amplitude spectrum, the temperature distribution matrix and the high-frequency current spectrum of a to-be-tested electrical penetration assembly; extracting a time domain feature from the leakage current, extracting a frequency domain feature from the partial discharge spectrum, and extracting a space gradient feature from the temperature field; carrying out weighted fusion on the time domain features, the frequency domain features and the spatial gradient features by adopting an attention mechanism; reducing the 128-dimensional features after the attention mechanism fusion to three-dimensional spatial features; processing the fused three-dimensional space characteristics by adopting a bidirectional long-term memory network to obtain a residual life prediction value of the electrical penetration assembly; judging the aging stage of the electrical penetration assembly according to the residual life prediction value; presetting an aging threshold value, and when the predicted aging stage exceeds the threshold value, automatically adjusting the temperature and humidity parameters of the environmental test box to a safe working condition; the method is used for solving the problem that a traditional evaluation result is inaccurate.

The invention provides a frost test system, method and equipment, and relates to the field of test equipment, the system comprises a damp-heat test box, the damp-heat test box is provided with a first working cavity, and the damp-heat test box is used for controlling the temperature and humidity in the first working cavity; the temperature test box is arranged in the first working cavity, is provided with a second working cavity, and is used for controlling the temperature in the second working cavity; the temperature test box further comprises a box door, and the box door is used for communicating or separating the first working cavity and the second working cavity. One end of the connecting sleeve is communicated with the second working cavity, and the other end of the connecting sleeve is communicated with the external environment, so that the test control equipment can be connected with the to-be-tested device in the second working cavity through a connecting wire penetrating through the connecting sleeve; according to the system provided by the invention, the temperature test box is nested in the damp heat test box, rapid switching of different test environments is realized through opening and closing of the box door, a sample does not need to be manually moved, and the test efficiency is improved.

The invention discloses a test device and a test method for a vibration and dislocation double-input lower span tilting-sliding fault tunnel. The test device comprises a test box body, a hydraulic actuator, a loading unit, a covering layer soil body, a tunnel physical model and a sensor monitoring system, wherein the test box body consists of a movable steel plate and a fixed steel plate; the loading unit consists of an angle adjusting module and a hydraulic control system; a bed rock model, a covering layer soil body and a tunnel model are arranged through a modular construction method, and data are collected in real time through soil pressure, microseismic and strain sensors and displacement meters. According to the invention, the failure mechanism of the cross-fault tunnel under the coupling action of bed rock dislocation and pulse seismic oscillation can be accurately simulated, the damage rule of the combined action of fault dislocation and seismic waves to the tunnel structure is revealed by qualitatively and quantitatively analyzing the strain, displacement, soil pressure and seismic oscillation response of the tunnel, and a test basis is provided for the aseismic design of the cross-fault tunnel.

The invention relates to the technical field of construction material testing, and provides a tunnel construction material waterproof performance testing device which comprises a freezing and thawing test box, a machine box and a rack, a pressurized water injection system and a sealing slotting mechanism are arranged in the rack side by side, and the pressurized water injection system comprises a jack and a water pressure system; the jack is used for detecting the bearing load strength of the material test block, and the water pressure system is used for pressurizing water and detecting the waterproof performance of the material test block under high load. The tunnel construction material waterproof performance testing device integrates pressure resistance, erosion resistance, freezing resistance and waterproof performance detection tests on construction materials, can simulate the overall state of the construction materials in different tunnel environments to perform waterproof performance tests, so that the construction materials are added according to different tunnel requirements to improve the waterproof performance, and meanwhile, through the arrangement of the sealing slotting mechanism, the waterproof performance of the tunnel construction material is improved. The contact surface of the material test block and the water pressure system can be subjected to sealing waterproof treatment, and water is prevented from overflowing from the contact surface during water seepage detection.

The utility model discloses a high-voltage electrochemical accelerated corrosion-seepage test system suitable for an anti-seepage curtain body. The high-voltage electrochemical accelerated corrosion-seepage test system comprises a test chamber, a packaging module and a pressurizing module, wherein the test chamber is used for mounting a test piece and providing a test environment; the packaging module is used for packaging the test chamber through water injection; according to the device, electrochemical corrosion can be carried out in the permeation pressurization and high-temperature process of the test piece, contact corrosion only located on the surface of the test piece is converted into permeation corrosion in the test piece, the corrosion condition of the coupling effect of various factors in the natural state can be restored, the test precision is improved, and the test efficiency is improved. And the corrosion process is greatly accelerated, and the time cost is saved.

The invention discloses a relay detection device, and belongs to the field of circuit switch testing, the relay detection device comprises a three-axis motion platform and a box body, the box body is internally provided with a detection cavity, a drop spraying test cavity and a plurality of immersion test cavities, the inner wall of the detection cavity is fixedly connected with a detection frame, and the outer surface of one side of the box body is fixedly connected with a detector connected with the detection frame; the inner wall of the dripping and spraying test cavity is connected with a plug-in jig, and the inner walls of the plurality of soaking test cavities are fixedly connected with a plurality of plug-in frames respectively; different chemical exposure conditions possibly encountered by the relay in practical application can be simulated, different exposure modes may cause different failure modes, weak links of the relay in various chemical environments can be more comprehensively revealed through the setting of the application, different types of tests can be performed on the same batch of samples, and the test efficiency is improved. And meanwhile, the equipment can realize automation of a test process, and manual intervention is reduced.

The invention provides circulating salt spray testing equipment for detecting corrosion resistance of a nitrided single crystal material, and relates to the field of salt spray testing equipment.The circulating salt spray testing equipment comprises a base, and a salt spray testing box and a control box are installed on the left side and the right side of the upper end face of the base respectively; a partition plate is mounted on the middle side of the interior of the salt spray test box, a rectangular through opening is formed in the partition plate, a vertical rotating shaft is rotationally connected into the rectangular through opening, and a vertical rotating plate is fixedly connected to the exterior of the vertical rotating shaft. According to the salt spray test equipment, the interior of the salt spray test box is divided into two independent test cavities through the partition plate, and a gap between the vertical rotating plate and a rectangular through opening in the partition plate is effectively sealed through the frame-shaped sealing sponge, so that the salt spray test equipment can simultaneously execute dual functions of salt spray and drying, and the test efficiency of the corrosion resistance of a test block is remarkably improved; the problem that in the salt mist and drying testing process of current salt mist testing equipment, the salt mist and drying functions are difficult to execute at the same time, and therefore the testing efficiency is reduced is solved.

The invention belongs to the technical field of geotechnical engineering test equipment, and provides an energy wall model test device and method.The energy wall model test device comprises a test box, a continuous wall is placed in the test box, the test box is filled with soil, a heat exchange tube is arranged in the continuous wall, and a pressurizing assembly is arranged on one side of the test box and used for extruding the soil into the test box; the first seepage assembly comprises a water tank arranged in the test box, and the side wall, close to the continuous wall, of the water tank is communicated with a plurality of water outlet pieces used for seeping water into a soil body on the side edge of the continuous wall; the second seepage assembly comprises a plurality of sprinkling pipes arranged at the top of the test box, and the sprinkling pipes are used for seeping water into the soil body at the top of the continuous wall; the monitoring assembly comprises a plurality of second temperature sensors and a plurality of pressure sensors, and the second temperature sensors and the pressure sensors are evenly distributed on the side wall of the continuous wall. According to the invention, the influence of soil pressure and seepage working conditions under different burial depths on the thermal performance of the energy wall can be coupled and simulated.