116 results about "Environmental chamber" patented technology

The present invention relates to an in-situ micro-nano impact indentation testing instrument, falling within the technical field of material micromechanical testing. The instrument comprises a nitrogen generation module, an environmental chamber, a high / low temperature loading module, an “optical-infrared” in-situ monitoring module, an “electromagnetic-piezoelectric” coupling impact module, etc. After the nitrogen is introduced into the environmental chamber and the test area is determined by microscopic imaging, the “electromagnetic-piezoelectric” coupling impact module can drive an indenter to indent a specimen. An acoustic emission sensor embedded in the high / low temperature loading module can monitor the surface crack propagation of the specimen. The “optical-infrared” in-situ monitoring module can perform real-time high-speed optical imaging and infrared imaging on the impact indentation process. The present invention can perform micro-nano impact indentation testing on the material at high or low temperatures.

The invention discloses a construction method and system for volatile organic compound release behavior characterization, and belongs to the technical field of air analysis and risk assessment. According to the method, feature analysis is carried out based on multi-source information such as a molecular structure, a release carrier and environmental conditions, modeling is carried out on a release process by utilizing a mapping operator, and a three-dimensional representation vector V = [I, S, E] reflecting release intensity, environmental sensitivity and time evolution is constructed. The representation is output in a behavior vector or digital label mode, and unified quantitative benchmarking of different substances in a cross-scene mode is achieved. According to the method, depth characteristics such as molecular polarity and desorption activation energy are introduced, so that the dependence on long-period environmental chamber experiments is reduced, the generalization prediction capability on unknown pollutants is improved, the logic connection problem between a bottom-layer physical mechanism and an upper-layer intelligent management and control system is solved, and the reliability of the system is improved. And standardized and explainable behavior input is provided for prospective risk research and judgment.

The invention provides a building external window solar heat gain coefficient detection device and a control method thereof. According to the device, a detection chamber is divided into an outdoor environment simulation chamber and a heat metering box environment chamber through a partition wall. And a test piece frame for arranging a tested piece is arranged on the partition wall body. A heat metering box, a cooling circulation system and a data acquisition device are arranged in the heat metering box environment chamber. The heat metering box is provided with an opening located at the test piece frame so as to receive simulation radiation of the outdoor environment simulation chamber penetrating through the tested piece. The detection work of the solar heat gain coefficient of the external window of the building is not influenced by natural conditions such as weather, and the test efficiency is improved. Furthermore, a channel flat pipe and a constant-temperature water bath device in the cooling circulation system are matched with each other, it is guaranteed that the temperature in the environment chamber of the heat metering box is kept stable, and the stability and accuracy of detection data are improved while the structure of the device is simplified.

The invention relates to the technical field of wire harness aging test, in particular to a truck wire harness aging test method based on simulation of severe working conditions, which comprises the following steps of: 1, calibrating working condition mapping reference parameters, then detecting various parameters of a wire harness in sequence, and establishing a wire harness performance reference parameter library with reference values of the parameters; 2, placing the wire harness in an environmental chamber, and carrying out a 60-hour composite environment aging cycle test; 3, carrying out hierarchical failure determination after each cycle; 4, when at least one parameter reaches the failure standard, the aging life of the truck wire harness is converted according to the corresponding relation between the preset cycle index and the actual use time. According to the invention, severe working conditions can be accurately simulated: complex actual working conditions of a truck mining area and a construction site are comprehensively considered, and various environmental stresses are comprehensively simulated in an aging test. Compared with a traditional single or simply combined test environment, the performance change and potential problems of the wire harness in a real scene can be more effectively detected.

The invention provides a method suitable for an environmental bin heating test, and belongs to the technical field of environmental bin heating test, the method comprises the steps: determining a temperature measurement position through a graph theory topology optimization sensor arrangement algorithm, constructing a temperature field graph, configuring a Beckfu controller to collect temperature data at high frequency, and carrying out sliding window statistical test processing; a high-power main heater and a low-power auxiliary heater are installed at the top and the bottom of the environment bin respectively to form a closed-loop circulation system, temperature control partitions are divided according to the temperature deviation value, and a fuzzy sliding mode variable structure control algorithm is adopted to calculate partition heater control instructions. A control instruction is input into the thermal field dynamic balance optimization model for global collaborative optimization, an optimal power distribution scheme is output, a variable-power staged heating strategy is executed to achieve rapid temperature rise and fine temperature adjustment, and the technical problem that the test precision is reduced due to uneven temperature field distribution in the environment bin heating test process is solved.

The invention relates to the technical field of solar photovoltaic modules, and particularly discloses a process method for passivating and contacting an auxiliary battery at a module end. The process method comprises the following steps: after battery pieces are subjected to series welding, lamination and packaging to form a battery assembly, the battery assembly is placed in an environment box for illumination, the temperature is set to be 50-75 DEG C, the irradiance is 1000-1500 Wh / m < 2 >, the forward current is 2-5 A, and illumination is carried out for 1-4 h. Under the conditions of high irradiance, medium temperature and low current, the battery piece adopting the LECO technology has a good internal defect repairing effect, contact between a metal electrode and silicon can be optimized again, the FF value and the Voc value of the battery assembly are improved, and therefore the power of the battery assembly is remarkably increased; and the contact resistance and passivation effect can be optimized at the component end in an auxiliary manner, so that the component power is improved, novel equipment does not need to be added on a production line, and the production efficiency is not influenced.

The invention discloses an environmental chamber multi-chamber temperature control device and method. The environmental chamber multi-chamber temperature control device comprises a placing frame, and T-shaped sliding grooves are formed in the front side and the rear side of the right side of the placing frame. By adopting the T-shaped sliding grooves and the T-shaped sliding strips between the placement frame and the environment cabin shells, flexible sliding installation and disassembly of the multiple environment cabin shells are achieved, the number and layout of the cabin bodies can be rapidly adjusted according to experiment requirements, and the use flexibility of the device is remarkably improved. An electric heating plate arranged in the temperature control cavity and a semiconductor chilling plate form a two-way temperature adjusting system which is matched with a rotating disc connecting rod mechanism driven by a motor to drive a stirring frame to slide back and forth in a reciprocating mode, heat-conducting media in the temperature control cavity can be effectively stirred, and local temperature gathering is avoided. The storage cavity forms an air internal circulation system through the air outlet pipe, the air inlet pipe, the conveying pipe and the built-in fan, so that air in the storage cavity flows, the environment temperature in the storage cavity is more uniform, and the device has the advantage of being accurate in temperature control.

The invention relates to the technical field of hydrogen-related testing, and discloses a hydrogen-related high-altitude environmental chamber system and a testing method thereof. An air conditioning system; the fresh air system provides fresh air with different humidity for the interior of the environment chamber body; the exhaust suction system simulates high-altitude low air pressure in the cabin body of the environmental cabin; the safety system is used for monitoring the oxygen concentration of the environmental chamber body and monitoring the hydrogen concentration of the environmental chamber body at multiple points; and the control system is used for connecting and controlling the air conditioning system, the fresh air system and the exhaust suction system to simulate the high-altitude temperature, humidity and low-pressure pressure, and is also used for receiving the oxygen concentration and the hydrogen concentration in real time and giving an alarm when any gas concentration is abnormal. According to the hydrogen-related high-altitude environmental chamber system and the testing method thereof, the temperature, humidity and low air pressure of high altitude can be simulated, the concentration of hydrogen and oxygen can be monitored in real time, multi-point accurate monitoring is performed on hydrogen, and automatic and timely treatment is performed when the concentration of hydrogen and oxygen is abnormal.

This invention belongs to the field of high-speed impact testing of rail vehicle components, and discloses a rapid cooling environmental chamber for high-speed impact testing of rail vehicle components. The chamber includes a chamber body, with one side serving as the impactor inlet. The inner walls of the other sides of the chamber are lined with liquid nitrogen condenser pipes and environmental temperature and humidity sensors. The liquid nitrogen condenser pipes are connected to a self-pressurized liquid nitrogen tank via an external channel to facilitate the conduction and delivery of the cooling medium. The impactor inlet is movably connected to the chamber frame and features an adjustable sliding mechanism. The adjustable sliding mechanism has stretchable sections connected to its left and right sides, and a disposable low-strength sealing and heat-insulating film is installed on the mechanism. The impactor inlet is located within the area of ​​this disposable low-strength sealing and heat-insulating film. A fixture for fixing the test piece is provided on the inner wall of the chamber. A high-speed camera mounting interface is located on the inner wall of the chamber, and a rotating support is located at the bottom of the chamber. This environmental chamber can rapidly achieve a preset low-temperature environment and perform multi-angle impact tests.

An environmental chamber for an ice water impact test belongs to the field of test equipment and comprises a chamber body, a simulation chamber and an equipment chamber are arranged in the chamber body, a heating unit, a cooling unit and a pure water unit are arranged in the equipment chamber, a rotary supporting seat and a spray head are arranged in the simulation chamber, a refrigerating unit is further arranged in the equipment chamber, and the heating unit and the cooling unit are both communicated with the interior of the simulation chamber. The water purification unit comprises a heat preservation water tank, the heat preservation water tank is connected with a water purification machine through a first pipeline, and the heat preservation water tank is connected with the spraying head through a second pipeline; the refrigeration compressor is respectively connected with the first evaporator and the cooling unit through the refrigeration pipeline and the electric three-way valve, so that the environmental chamber has an ice water impact function, the availability of the environmental chamber is increased, the vacancy rate of equipment is reduced, a special ice water impact test box does not need to be additionally purchased, and the equipment purchase cost is saved.

The application discloses a kind of liquid cooling wire harness detection method, device, storage medium and electronic device, it is related to vehicle technical field.Therein, the method comprises: according to test requirement determines test working condition;In test working condition, obtain first temperature, wherein, first temperature includes the temperature of liquid cooling wire harness, the temperature of environmental chamber and the temperature of electrical connection point, environmental chamber is used to isolate liquid cooling wire harness with external environment, and electrical connection point is the connecting point of environmental chamber and temperature sensor;In response to first temperature greater than or equal to temperature threshold value, adjust cooling parameter, wherein, cooling parameter is used to indicate the flow rate and water temperature of cooling loop;In the preset time period after adjusting cooling parameter, obtain second temperature;According to second temperature, liquid cooling wire harness is detected.The application solves the technical problem that related art tests liquid cooling wire harness by appearance inspection or electrical test, resulting in complex method, not easy to implement, low efficiency, low accuracy, low safety.

The invention discloses a jacket type environmental chamber cooling device and a cooling method thereof.The jacket type environmental chamber cooling device comprises a chamber body, the chamber body sequentially comprises a refrigeration cavity, an air circulation cavity and a storage cavity from outside to inside, and semiconductor chilling plates are fixedly connected to the front sides and the rear sides of the two sides of the interior of the refrigeration cavity. The cabin body is designed to be of a multi-layer structure comprising the refrigeration cavity, the air circulation cavity and the storage cavity, meanwhile, the semiconductor chilling plates are arranged on the two sides of the refrigeration cavity, and efficient heat transfer is achieved by means of the characteristics that the cold ends of the semiconductor chilling plates cool the refrigeration cavity and the hot ends of the semiconductor chilling plates dissipate heat outwards. The rotating shafts annularly distributed in the refrigerating cavity and the spiral conveying blades are driven by the motor to rotate, the refrigerating medium in the refrigerating cavity can be driven to spirally flow, the flowing dead angle and short circuit phenomena of the cooling medium can be effectively eliminated through the flowing mode, and therefore the cooling efficiency of the environment chamber is remarkably improved, and the service life of the environment chamber is prolonged. The device solves the problem of low cooling efficiency in the prior art, and has the advantage of good cooling effect.

This disclosure provides a torsion tube test bench, belonging to the field of automotive testing technology. The torsion tube test bench includes an environmental chamber, a vacuum pump, a steam generator, and a refrigeration unit. The environmental chamber houses the intake hose and the torsion tube, wherein the intake hose has a first intake port, a second intake port, and a first exhaust port, and the torsion tube has a third intake port and a second exhaust port, the second exhaust port being connected to the second intake port. The vacuum pump is located outside the environmental chamber and connected to the first exhaust port to draw air from the intake hose. The steam generator is located outside the environmental chamber and connected to the second intake port to introduce water vapor into the torsion tube. The refrigeration unit is located inside the environmental chamber to simulate the external environment in winter. Thus, only the torsion tube and the intake hose need to be tested, eliminating the need to test the entire vehicle, reducing testing costs and simplifying the testing process.

The invention relates to a system for program control using a digital processor, and more particularly to a system for automatically generating reports about the state of thermal vacuum and manufacturing systems. The technical result, which consists in more timely generation of reports about the state of thermal vacuum and manufacturing systems, is achieved in that the present system for automatically generating reports about the state of thermal vacuum and manufacturing systems comprises a host computer interconnected with a control unit that transmits control signals to monitoring and measuring devices and a data processing unit, wherein the monitoring and measuring devices transmit data to a data collection unit, which transmits data to the data processing unit, which transmits data to the control unit, which transmits data to the host computer, and the monitoring and measuring devices include a validation device, a device for measuring the amount of aerosol particles in the air, a device for remotely recording temperature and relative humidity values, a device for monitoring the parameters of controlled environment rooms, and a module for generating a report about a set of production equipment, wherein the data collection unit is connected to a database, which is connected to the data processing unit.

The utility model discloses a kind of formaldehyde environmental chamber equipment with background concentration self-checking and automatic cleaning function, the formaldehyde environmental chamber equipment includes cabin, the sample holder for placing sample is installed in the cabin, the temperature and humidity sensor for real-time monitoring environmental parameter in cabin and the air circulation device for maintaining air flow uniformity in cabin are used, the formaldehyde environmental chamber equipment also includes sampling detection module, spray cleaning module and main control system. The formaldehyde environmental chamber equipment can effectively replace the conventional means of existing dependence on artificial judgment and operation, realize the rapid judgment and cleaning response of test chamber state, greatly shorten test preparation time, reduce artificial operation frequency and detection time cost.

This invention discloses a wireless distributed networking test system and method for climate environment testing, relating to the field of wireless distributed networking test technology. The system includes at least one environmental chamber for placing the product under test (DUT), which is located within a pre-constructed distributed wireless local area network (WLAN). The WLAN includes a wireless base station and at least one wireless node, with one wireless node installed in each environmental chamber. At least one type of digital sensor is also installed in each environmental chamber. Each type of digital sensor is used to collect at least one type of parameter to be measured within the environmental chamber. The digital sensors transmit the collected parameters to the wireless node within their respective environmental chamber via a digital bus. The wireless node transmits the parameters to be measured within its environmental chamber to a test control terminal via the wireless base station. This invention solves the problem of low testing efficiency caused by complex cable laying in existing systems by constructing a distributed wireless local area network to transmit test data during the testing process.

The embodiment of the invention provides an air conditioner testing method and device and electronic equipment, and relates to the technical field of air conditioners. The method comprises the following steps: based on operating parameters of a to-be-tested air conditioner, performing a first test through an enthalpy difference chamber to obtain rated maximum power consumption of the to-be-tested air conditioner under the operating parameters; based on the operation parameters, a second test is carried out through an environment room, and the free operation power consumption of the air conditioner to be tested under the operation parameters is obtained; and according to the rated maximum power consumption and the free operation power consumption, energy-saving rate information of the air conditioner to be tested under the operation parameters is determined.

A method of baking a detector, the method comprising: placing a mid-wave infrared detector in an environmental chamber, wherein the environmental chamber is opaque. The mid-wave infrared detector comprises an anode, a guard terminal, and a cathode. The method further comprising connecting the anode to the cathode in a short circuit configuration, heating the environmental chamber to a bake temperature selected in the range of 60 to 70 degrees Celsius, and maintaining the detector in the environmental chamber for a period selected in the range of 72 hours to 240 hours.

1. The name of this design product: AI Environmental Chamber. 2. Purpose of this design product: This design is used to hold garbage. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: Stereoscopic drawing 1.

This invention provides a test apparatus for a vehicle thermal management system. The apparatus includes: an environmental chamber with a first accommodating cavity for simulating an external environment; a first test component located within the first accommodating cavity, comprising a simulated driver's cab and an air conditioning unit, the air conditioning unit being located within the simulated driver's cab and providing heat load to the simulated driver's cab; a thermal management system under test located within the first accommodating cavity, connected to the air conditioning unit for heat exchange; and a second test component located outside the first accommodating cavity, including a water-cooled unit connected to the thermal management system under test for heat exchange, the water-cooled unit providing battery heat load to the thermal management system under test. This solution addresses the technical problem that existing enthalpy difference test benches cannot meet the testing requirements of thermal management systems for new energy commercial vehicles.

This invention relates to the field of materials testing technology, specifically to a device for testing the fatigue tensile strength of synthetic rubber. The device includes a support assembly, an environmental conditioning assembly, a tensile testing assembly, and a discharge assembly. An environmental chamber is mounted on a base. A hoisting structure is used to hold the synthetic rubber to be tested. A sealed door is slidably mounted inside the environmental chamber, providing an entrance for the synthetic rubber. The environmental conditioning assembly is located inside the environmental chamber. A support rod is fixed inside the environmental chamber, and a sliding block is slidably mounted on the support rod. Two first clamping rods are rotatably mounted on the support rod, and two second clamping rods are rotatably mounted on the sliding block. A control component is used to control the first and second clamping rods to simultaneously clamp the synthetic rubber to be tested. A reciprocating movement component is used to control the reciprocating movement of the sliding block and the second clamping rods to drive the synthetic rubber to be tested for tensile testing. This device solves the problems of insufficient environmental simulation capability and unreliable clamping in existing technologies, achieving accurate fatigue tensile testing under multiple environmental conditions.

The present invention discloses an environmental chamber testing method for measuring the VOC adsorption / emission characteristics of flexible porous materials. The VOC distribution coefficient K and diffusion coefficient D of a fabric sample are key parameters that determine its adsorption and emission characteristics for indoor VOC gases. The present invention utilizes an environmental chamber to provide a constant temperature and humidity environment, conducts adsorption and emission tests on fabric samples in a closed state, and measures the VOC concentration in the environmental chamber at each stage. By establishing mass conservation equations for different adsorption and emission stages, a correlation formula between the VOC mass transfer characteristic parameters of the fabric sample and the VOC concentration in the environmental chamber is obtained. Combined with the analytical solution of the gas phase VOC concentration, the distribution coefficient K and diffusion coefficient D of the fabric sample VOC are obtained using algebraic calculation and nonlinear fitting. Through this method, the VOC adsorption / emission characteristics of flexible porous materials can be quickly and accurately measured.

The utility model belongs to the technical field of vehicle-mounted emission testing, and relates to a testing environmental chamber for vehicle-mounted emission testing, which comprises supporting legs, a bottom plate is fixedly connected to the middles of the supporting legs, a top plate is fixedly connected to the tops of the supporting legs, an environmental chamber body is mounted and connected to the top of the top plate, an exhaust pipe is mounted on one side of the environmental chamber body, and an exhaust pipe is mounted on the other side of the environmental chamber body. Rubber blocks are connected to the bottoms of the supporting legs correspondingly, and buffering assemblies are arranged on the two sides of the bottom plate correspondingly. Through the arrangement of the buffer assembly, the vibration amplitude of the environment chamber body can be reduced, so that the problems that the normal working state of the emission testing device is easily interfered due to excessive vibration, the accuracy of a testing result is easily influenced, the tested data is different from the actual data, the judgment of a worker on vehicle information is influenced, and the reliability of the environment chamber is improved are prevented. And the condition that the sensor in the testing device deviates or is damaged due to shaking can be possibly caused.

The invention provides an environment simulation device for an aircraft tire dynamic simulation test, and relates to the field of aircraft tire test equipment, the environment simulation device comprises an environment box, a heating circulation system, a liquid nitrogen cooling system and a connecting pipeline; a box body of the environment box is defined by side plates, a top plate and a bottom plate, the side plates comprise the first set of side plates and the second set of side plates which are oppositely arranged, the first set of side plates are each provided with an installation groove used for allowing a tire shaft to penetrate through in the hoisting process, and the environment box further comprises translation sliding doors arranged on the first set of side plates correspondingly; the bottom plate is a split type bottom plate; a pipeline connecting opening is formed in the top plate, and the heating circulating system and the liquid nitrogen cooling system communicate with the pipeline connecting opening through a connecting pipeline and are used for adjusting and controlling the temperature in the environment box. According to the invention, high and low temperature environment simulation can be rapidly carried out without dismounting the tire, and rapid evacuation is carried out, so that the tire is subjected to a dynamic test at a simulated temperature, the test accuracy and safety are improved, and the equipment cost and the operation difficulty are reduced.

The invention relates to the technical field of artificial intelligence, particularly provides an adaptive neural network steady-state temperature control method for a wide-temperature-range environment box, and aims to solve the technical problem that pure neural network single-mode steady-state temperature control cannot be realized in an existing temperature control scheme. In order to achieve the purpose, the temperature control method comprises the steps that a neural network model is constructed; acquiring a current temperature state parameter of the environment box; determining a loss function based on the current temperature state parameter and a preset target temperature; training a neural network model based on the loss function and the power adjustment proportion to obtain a pre-trained neural network model; the internal temperature of the environmental box is adjusted by using the pre-trained neural network model, so that the internal temperature of the environmental box can be quickly converged to the preset target temperature and kept stable, and the use requirements of different temperature intervals of the wide-temperature-range environmental box are met.

The invention relates to a whole vehicle wheel end loading system suitable for an environmental chamber and a loading method thereof, and the system comprises the environmental chamber which provides a high-temperature or low-temperature test environment for a to-be-tested vehicle; the supporting mechanism is used for supporting a vehicle body of the to-be-tested vehicle; the transmission part I is a tooth-shaped transmission structure mounted on the outer circumference of the tire; the loading power source is connected with a transmission shaft and is used for transmitting the torque output by the loading power source; and the second transmission part is connected with the first transmission part and is combined with the transmission shaft to realize road resistance loading of the to-be-tested vehicle. According to the whole vehicle wheel end loading system suitable for being used in the environmental chamber, torque transmission is achieved through the external loading power source and the internal transmission chain, tire dismounting is avoided, occupied space is reduced, meanwhile, the external heat source does not interfere with the temperature of the environmental chamber, and therefore real road resistance is efficiently simulated; the device has the advantages of improving the space utilization rate, reducing the operation complexity, preventing heat from interfering the temperature of the environment chamber and realizing real road resistance simulation.

The utility model discloses a system for testing VOCs released by a material, and belongs to the technical field of VOC testing. Comprising a bag type environmental chamber, a chemical ionization source and a mass spectrometer, the bag type environmental chamber is communicated with the chemical ionization source, and the chemical ionization source is communicated with the mass spectrometer; the bag type environment chamber comprises a water bath kettle, a bubbling bottle, an environment air bag, a constant temperature box and an auxiliary air bag, the environment air bag and the auxiliary air bag are arranged in the constant temperature box, and the environment air bag is communicated with the auxiliary air bag; the bubbling bottle is arranged in the water bath kettle, the water bath kettle is communicated with the environment air bag, and the environment air bag is communicated with the chemical ionization source. The environment air bag can be cleaned through cooperation of the auxiliary air bag and the constant-temperature box, a new air bag does not need to be replaced, the experiment cost is reduced, and the implementation efficiency is improved; the problems that the mass spectrum analysis efficiency is low and the time resolution of mass spectrum analysis is influenced due to the fact that environment starting is manually replaced are solved.

This invention relates to the field of CFRP leakage detection technology, specifically to an in-situ CFRP leakage rate testing system under extreme thermo-coupling environments. The system comprises an extreme temperature environment simulation and mechanical loading subsystem, consisting of an environmental chamber and a mechanical loading unit; an in-situ helium mass spectrometry leakage detection subsystem, used to construct an independent helium chamber on one side of the sample; a molecular pump and a backing pump connected via stainless steel tubing on the other side of the sample; leakage detection using a helium mass spectrometer leak detector; and a multi-channel synchronous data acquisition and control subsystem, used for unified triggering of acquisition channels and software time correction; and for controlling environmental temperature, strain loading, real-time acquisition of leakage signals, and unified timeline display of multi-channel data. This invention improves the realism of environmental simulation, the continuity of detection, and the integrity of data correlation in CFRP leakage detection.

The invention discloses an unsaturated frozen soil roadbed effective stress simulation test system and method, and belongs to the technical field of frozen soil engineering. The system comprises a multi-field coupling environment box, a three-dimensional loading system, a multi-parameter sensing array, a high-frequency pulse ultrasonic imaging module and a data fusion and processing platform. The environment box simulates a temperature-humidity-force-ice crystal coupling environment, the loading system applies various loads, the sensing array monitors multiple parameters of a soil body, the imaging module monitors ice crystals and a soil body structure, and the data platform realizes data processing and model updating. The method comprises the steps of preparing a soil sample embedded sensor, performing multi-field coupling loading, calculating effective stress and inverting related parameters, evaluating damage and predicting the service life based on a specific algorithm and the like. The frozen soil roadbed service environment can be truly reproduced, the ice pressure can be directly measured, the model parameters can be dynamically updated, the service life can be accurately predicted, a reliable basis is provided for cold region engineering research, design and preventive maintenance, and the freezing injury risk is effectively reduced.

This invention discloses an experimental device for evaluating the water purification performance of constructed wetlands under low-temperature conditions, relating to the field of wastewater treatment experimental technology. The device includes an environmental chamber and multiple parallel experimental units. The environmental chamber contains a low-temperature medium, and each experimental unit includes a water storage tank, a water pump, and a substrate-filled column. The water storage tank is partially submerged in the low-temperature medium and has a support plate inside. The support plate is arranged with a layer of *Potamogeton crispus* and a layer of aquatic plants from bottom to top, separated from the upper water purification zone by an intermediate filter. The water pump, substrate-filled column, and water storage tank are connected by pipelines to form a circulating water system. By simulating a cold winter environment using the low-temperature medium, and utilizing multiple independent experimental units, the purification efficiency of different substrate and plant combinations under low-temperature conditions can be compared simultaneously, recreating the low-temperature operation scenario of natural wetlands and achieving reliable and controllable testing of the water purification performance of constructed wetlands under low-temperature conditions.