31results about How to "The experimental data is real" patented technology

The invention relates to a soil pressure balance type tunnel shield analog experiment system, a rectangular soil coelom with the upper part provided with an opening is internally provided with a shield machine model and filled with a simulated soil body, the axle wire of the shield machine model is overlapped with that of the soil coelom; the upper surface of the simulated soil body is covered with a layer of concrete cushion the upper surface of which is connected with a horizontal loading beam by more than two soil pressure jacks, the horizontal loading beam is connected with the bottom of the soil coelom by an anchor rope; and the simulated soil body is also internally embedded with a soil pressure box, a grating fiber optical sensor and a displacement meter, wherein, the soil pressure box, the grating fiber optical sensor and the displacement meter are all electrically connected with a data acquisition and processing device. The system can simulate the influence of shield tunnel construction between subways of cities on the stratum and surrounding environment more conveniently, actually and effectively, and provide more actual and accurate experimental data for tunnel construction and design so as to guarantee the high-efficiency and safety of the shield tunnel construction of cities.

A multi-functional medium-sized animal breeding isolation system relates to an isolation system for breeding medium-sized animals in a controllable microenvironment. The isolation system comprises an isolator cover body (2), a ventilating equipment unit (1), a camera system (3), a television entertainment system (4) and an automatic control system which is composed of a control box (6), a rotatable support bar (7), a touch screen (8) and an alarm indicator light (9); and a transparent plate of a front door (41) is provided with a glove and oversleeve system (58), a cage orbit and a pulley (55) which are fixed on an inside base as well as an animal cage (54). The isolation system is characterized in that: the ventilating equipment unit (1) comprises two (one operation, one standby) air exhaust fans (22) and an air intake fan (25); one side of the cover body is provided with a DPTE350alfa transfer door (42) for transferring experimental supplies or animals; and the lowest step at the bottom is provided with a DPTE270alfa transfer door (44). The medium-sized animal breeding isolation system can breed different animals infected by pathogen or clean animals, and can also realize a plurality of functions such as disinfection effect evaluation and the like.

The invention discloses an earth pressure balance type shield simulation test system. A model shield machine is arranged in a rectangular earth mass chamber, wherein the upper part of the rectangular earth mass is opened; a simulation earth mass is filled in the rectangular earth mass chamber; an axle wire of the model shield mechanism is overlapped with that of an earth mass chamber; the simulation earth mass is covered with one concrete cushion; an upper surface of the concrete cushion is connected with a horizontal loading beam through more than two earth pressure jacks; the horizontal loading beam is connected with the bottom of the earth mass chamber through an anchor cable; and an earth mass pressure box, a fiber grating sensor and a displacement meter are embedded in the simulation earth mass and electrically connected with a data acquiring and processing device respectively. The earth pressure balance type shield simulation test system can simulate the influence of shield tunnel construction among urban subway areas on stratum and a surrounding environment more conveniently, more truly and effectively and provides more true and accurate experimental data for the construction and the design of the tunnel so as to ensure the high efficiency and the safety of the construction of urban shield tunnels.

The invention discloses a device and a method for evaluating the segregation degree of cement concrete. The device comprises a supporting component, a testing component and a density measuring component, wherein the supporting component comprises a base, a vertical arm, a cross beam, a lifting device and a bolt; the testing component comprises a fixing screw, a vibrating device and a containing chamber; the density measuring component comprises a stand column, a density instrument, a sliding rail, a fixing device and a guide rail. The device can simulate vibrating conditions of the cement concrete during transportation and vibration to provide more real testing data. The density measuring component is added, so that the density of the cement concrete can be measured accurately in real time. The testing device is convenient to operate, good in economy and high in practical value.

The invention provides an experimental device and an experimental method for simulating formation to break of a barrier dam. The device comprises a water storage tank, a water measuring weir, a main tank, a branch ditch and a bracket, wherein the water measuring weir is used for injecting water into the water storage tank and measuring the upstream incoming flow of the water storage tank; the maintank is connected with an outlet of the water storage tank; the gradient of the main groove, the gradient of the branch ditch and the height of the connecting plate are adjustable; the width of a fluid channel of the main groove is adjustable; the incoming flow and the water surface height are adjustable; therefore, the conditions of different main grooves and branch grooves can be simulated moreaccurately; a process of forming the barrier dam by landslide river blockage under different branch ditch landslide mass material source magnitude conditions as well as a break flooding evolution process is also provided. The method is beneficial to more comprehensively obtaining the data of the barrier dam disaster chain evolution rule, the formation characteristics and the burst water supply characteristics, and the scientificity and accuracy of the barrier dam formation process and the barrier dam burst mechanism research are improved.

The invention relates to a high-speed train-tunnel aerodynamic characteristic movable model experiment system which comprises an air cannon launching device (6), a train model (1), a tunnel model (2) and a guide rail (3) in the tunnel model (2); the section of the cannon tube (4) of the air cannon launching device (6) is in the shape of a gate arch, the shape of the bottom (3') thereof is the same with the shape of the guide rail (3) in the tunnel model (2), and the bottom (3') and the guide rail (3) in the tunnel model (2) are connected into an integrated structure; and the section of the guide rail (3) is in an I-shaped structure, the middle at the bottom of the train model (1) is matched with the I-shaped structure of the guide rail (3), and the train model (1) is embedded on the guide rail (3) in a sliding mode. Through the system, the train model stably runs on the guide rail, the train model has large size and is more approximate to the real state of train running, and the aerodynamic characteristic of a train running in a tunnel can be better simulated and researched.

The invention provides a combined type multifunctional experiment tower and an experiment device thereof. The experiment tower is assembled by a tower kettle segment, a plate type tower segment, a filler tower segment, a condensing tower segment, an entrainment test tower segment and a plurality of closing plates. The experiment device is formed by the connection of the experiment tower, a gas bomb, a fan, a recirculation tank and a flowmeter by a conduit, a valve, and the like. The experiment device can realize the cold-hot die rectification experiment technological process by switching the valve, and the experiment technological process is very convenient to convert. The absorption and desorption experiment technological processes further can be realized by the reassembly of the tower segments and the connection between the tower device and the external equipment, so that the research field of the absorbent is widened. The experiment device is modularized in structure, convenient toinstall, and strong in experiment function, can run under the condition of the water and the electricity, can be used for performing the on-line research of the tail gas recovery in chemical factories such as the oil refinery, the coal chemical factory and the like, and can be used for treating the wastewater which is more dispersed and is small in quantity in the oil extraction factory and the like.

The invention discloses a uniaxial tension compression system. A hydraulic cylinder (7) is arranged just above a lower pressure head 6; a loading head (8) is arranged at the lower end of a piston of the hydraulic cylinder (7); a probe of a linear variable differential transformer (9) is downwards vertical and is contacted with the upper end of the piston of the hydraulic cylinder (7); the oil inlet of a servo valve (11) is connected with the oil outlet of a variable plunger type hydraulic pump (18); the oil return outlet of the servo valve (11) is connected with the oil return port of the variable plunger type hydraulic pump (18); a branch pipe (26) is connected to a second oil pipe (17'); the branch pipe (26) is connected with an oil nozzle (24) at the bottom of an energy accumulator shell (20); a capsule bag (22) is arranged in the energy accumulator shell (20); and the exterior of the capsule bag (22) is filled with hydraulic oil (25). According to the system disclosed by the invention, a fixture stress concentration effect is avoided, a test piece is completely in a stretched state in the test process, which is consistent with the experimental purpose, and the acquired test data is very intuitive, real and reliable.

The invention discloses a roadbed slope retaining structural object large-scale model test loading system. The horizontal loading system is composed of a reaction wall, servo loading cylinders, loading plates, guide rods and anchor ropes. The reaction wall is embedded into a foundation, the two anchor ropes are arranged on the top of the reaction wall for reinforcement, the multiple servo loading cylinders are installed on the above-ground portion of the reaction wall, one end of each servo loading cylinder is connected with the corresponding loading plate, and the guide rods are arranged between the reaction wall and the loading plates. By means of horizontal loading, the magnitude of force transmitted to a structural object and the distribution mode of the force can be clearer. Gradation loading is achieved through a servo loading system, the real stress state of a soil body can be more accurately presented again, and more real experimental data can be conveniently obtained. The reaction wall is embedded into the soil body and reinforced by the anchor ropes, displacement is well controlled, the influence on the environment is small, and the manufacturing cost is low.

The invention discloses an experiment system and an experiment method based on micro-fluid control and Jamin effect observation. The experiment system comprises a pressure driving device, a data acquisition device, a graph acquisition device and a micro-silicon chip with a photolithographic micron-channel, the pressure driving device is connected on one side of the micro-silicon chip, the data acquisition device is connected on the other side of the micro-silicon chip, the graph acquisition device is positioned above the micro-silicon chip, the pressure driving device is used for fluid injection and pressure control of the experiment system, the data acquisition device is used for acquiring and processing auxiliary data, and the graph acquisition device is used for shooting and recording deformation images of fluid droplets in the micron-channel and observing two-phase interface conditions of the fluid droplets. By the aid of a cross channel model, pressure and the sizes of generated droplets and bubbles are controlled, a throat channel is formed to observe deformation, so that Jamin effect is researched, two-phase micro-fluids can be controlled by a simple method as compared withthe prior art.

The invention provides a vibration fatigue test device in a high-pressure hydrogen environment. The vibration fatigue test device comprises a vibration worktable, a closed box body, a hydrogen systemand an industrial personal computer; the vibration worktable is placed in the closed box body, and the hydrogen system is used for injecting hydrogen into the closed box body; and a vibration test sample is fixed on the vibration worktable, and the industrial personal computer controls the vibration worktable and the hydrogen system. The closed box body comprises a vibration table base, an upper top cover and an outer side wall, the outer side wall is arranged between the vibration table base and the upper top cover, and the vibration table base, the upper top cover and the outer side wall form a closed space; and the vibration worktable is placed on the vibration table base, a gas hole is formed in the upper top cover, and the gas hole is connected with the hydrogen system. The vibrationfatigue test device provided by the invention can detect a vibration fatigue service life of the test sample in the hydrogen environment.

The invention discloses a microelectrode system and method for testing an oxygen mass transfer coefficient of a proton exchange membrane. The system comprises an electromagnetic shielding box, an on-off type temperature controller and an environment cavity formed in the electromagnetic shielding box; atmosphere can be continuously introduced into the environment cavity, and humidity can be monitored; a high-temperature-resistant clamping device, a platinum disc microelectrode with the effective diameter being 10 micrometers, a platinum sheet electrode, a silica gel heating plate and a temperature sensor are arranged in the environment cavity; the clamping device is used for sequentially superposing and clamping the proton exchange membrane to be detected, the platinum sheet electrode and the silica gel heating plate; the on-off temperature controller is connected with the silica gel heating plate, the temperature sensor is used for monitoring the temperature of the silica gel heating plate, the platinum disc microelectrode serves as a working electrode, and the platinum sheet electrode serves as a counter electrode and a reference electrode and is connected to the electrochemical workstation. According to the system and the method disclosed in the invention, the mass transfer coefficient of oxygen in various polymer electrolytes can be quantitatively and accurately characterized, and quantitative guidance is provided for optimization of a catalytic layer structure.

The invention discloses an acquisition method for inter-phase operation shock-insulation level altitude modified value of 2-4km-elevation 500kV-substation electrical equipment, and relates to the field of high-altitude ultrahigh-pressure transmission and transformation projects. The technical scheme includes the steps of 1), calculating the inter-phase operation shock-insulation level altitude modified value of flexible busbars at optional areas located at the altitude ranging from 2000m to 4000m or a grading ring; 2), inquiring the inter-phase operation shock-insulation level altitude modified value of the flexible busbars and the grading ring corresponding to the altitude of 0; 3), multiplying the inter-phase operation shock-insulation level altitude modified value of the flexible busbars and the grading ring corresponding to the altitude of 0 by the correction factor Ka to acquire the inter-phase operation shock-insulation level altitude modified value of the flexible busbars when the altitude is H.

The invention discloses an L-shaped anchor rod drawing test clamping device for highway engineering, and provides a special tool. The device comprises a drawing instrument, a hollow jack, a steel cylinder, a base, an adjusting cylinder, a locking disc, a force equalizing disc and a pull rod. The drawing instrument controls the action of the hollow jack; forward threads and reverse threads are respectively arranged at the upper end and the lower end of the adjusting cylinder, and the upper end and the lower end are respectively connected with the steel cylinder and the base through the threads;a self-locking mechanism I for clamping an L-shaped anchor rod is arranged in the center of the locking disc, the pull rod penetrates through the hollow jack, the lower end of the pull rod is locatedin the center of the force equalizing disc, and the upper end of the pull rod is clamped by a self-locking mechanism II. The device is good in mechanical property; through the support by the cylinderstructure, the L-shaped anchor rod to be tested is located in the center of the cylinder structure and located on the same vertical line with the hollow jack, so that no eccentric loading force exists, and accurate experiment data can be obtained.

The invention belongs to the technical field of civil engineering test devices, discloses a structure multi-dimensional loading test system considering real and complex boundary conditions, and solves the problem that the stress state of existing quasi-static and quasi-dynamic loading equipment in a model test of a civil engineering structure is significantly different from the actual situation. The structure multi-dimensional dynamic loading test system considering the real and complex boundary conditions comprises a main machine part, a base part, a hydraulic power source and a control system. The system can better and more accurately simulate the load borne by the structure in a real working environment, realizes spatial six-degree-of-freedom multi-dimensional load loading, can provide more real experimental data with higher practical value for the damage research of reinforced concrete materials, components and structures under the action of earthquakes, the research result is helpful for researchers to further reveal the failure mechanism of the reinforced concrete structure, put forward corresponding failure criteria and develop a corresponding anti-seismic design method.

The invention discloses a device and method for evaluating the corrosion state of a metal part under the simulated ocean multi-parameter condition, and the device comprises an inner reservoir and an outer reservoir, the inner reservoir is installed in the middle of the interior of the outer reservoir in a nested manner, and the inner reservoir and the outer reservoir can form a circulating ecological seawater flow. The technical problem that a marine corrosion experiment cannot be carried out when a laboratory does not have a marine environment is solved, the evaluation method uses a monitoring method based on an image processing method to measure the corrosion rate, the obtained image is identified by using an Otsu method and region growth, and the corrosion region area is obtained according to the total number of pixels of the image. The corrosion area change value corresponds to the corrosion rate measured by a linear polarization method, and the corrosion rate is rapidly determined through real-time image monitoring. The comprehensive influence of the actual marine environment on material corrosion is fully considered, and the device has the advantages of real experimental data, short test period, high efficiency, simple structure and convenience in use.

The invention discloses a high-speed spinning cup internal flow field dynamic pressure wireless measuring device. An electromotor is connected with a rotation shaft through a coupler. The rotation shaft is connected with a spinning cup firstly through threads and then through a split pin. A gasket installation hole is formed at the upper end of inner threads in the center of the spinning cup. A trigger hole is formed at the upper end of the gasket installation hole. A wireless sensor is installed in an installation hole at the upper end of the rotation shaft. The wireless sensor abuts against the lower surface of the trigger hole through a gasket. A trigger head of the wireless sensor penetrates through the trigger hole in the spinning cup to be flush with the upper surface of the trigger hole. A receiver is placed on a test bench. The wireless sensor is connected with the receiver in a wireless mode through the Wi-Fi. According to the high-speed spinning cup internal flow field dynamic pressure wireless measuring device, a high-speed spinning cup internal flow field is directly measured through the wireless sensor, and test data are true and reliable. Due to the fact that the trigger head of the wireless sensor is flush with the upper surface of the spinning cup, the structure of the high-speed spinning cup internal flow field will not be influenced. Signals received through the receiver are analyzed, the structure and the change mechanism of the high-speed spinning cup internal flow field are searched, and a test device and a measuring method are provided for follow-up research.

The invention relates to a soil pressure balance type tunnel shield analog experiment system, a rectangular soil coelom with the upper part provided with an opening is internally provided with a shield machine model and filled with a simulated soil body, the axle wire of the shield machine model is overlapped with that of the soil coelom; the upper surface of the simulated soil body is covered with a layer of concrete cushion the upper surface of which is connected with a horizontal loading beam by more than two soil pressure jacks, the horizontal loading beam is connected with the bottom of the soil coelom by an anchor rope; and the simulated soil body is also internally embedded with a soil pressure box, a grating fiber optical sensor and a displacement meter, wherein, the soil pressurebox, the grating fiber optical sensor and the displacement meter are all electrically connected with a data acquisition and processing device. The system can simulate the influence of shield tunnel construction between subways of cities on the stratum and surrounding environment more conveniently, actually and effectively, and provide more actual and accurate experimental data for tunnel construction and design so as to guarantee the high-efficiency and safety of the shield tunnel construction of cities.

The invention discloses a uniaxial tension compression system. A hydraulic cylinder (7) is arranged just above a lower pressure head 6; a loading head (8) is arranged at the lower end of a piston of the hydraulic cylinder (7); a probe of a linear variable differential transformer (9) is downwards vertical and is contacted with the upper end of the piston of the hydraulic cylinder (7); the oil inlet of a servo valve (11) is connected with the oil outlet of a variable plunger type hydraulic pump (18); the oil return outlet of the servo valve (11) is connected with the oil return port of the variable plunger type hydraulic pump (18); a branch pipe (26) is connected to a second oil pipe (17'); the branch pipe (26) is connected with an oil nozzle (24) at the bottom of an energy accumulator shell (20); a capsule bag (22) is arranged in the energy accumulator shell (20); and the exterior of the capsule bag (22) is filled with hydraulic oil (25). According to the system disclosed by the invention, a fixture stress concentration effect is avoided, a test piece is completely in a stretched state in the test process, which is consistent with the experimental purpose, and the acquired test data is very intuitive, real and reliable.

The invention discloses a cement concrete segregation degree evaluation device and an evaluation method thereof. The device includes a support part, a test part and a density measurement part; the support part includes a base, a vertical arm, a beam, a lifting device, and a bolt; the test The components include fixing screws, a vibrating device, and a material storage chamber; the density measuring components include a column, a density meter, a slide rail, a fixing device, and a guide rail. The invention can simulate the vibration situation of cement concrete in the process of transportation and vibration, and provide more realistic experimental data. It incorporates a density measuring device, which can accurately measure the density of cement concrete in real time. The test device of the invention is easy to operate, good in economy and high in practical value.

The invention provides an experimental device and an experimental method for simulating the formation of a barrier dam to its failure. The device includes a water storage tank, a water measuring weir for injecting water into the water storage tank and measuring the flow rate upstream of the water storage tank, a main tank connected to the outlet of the water storage tank, a branch ditch laterally intersecting the main tank, and a bracket . Among them, the slope of the main groove, the slope of the branch groove, and the height of the connecting plate are adjustable, the width of the fluid channel of the main groove is adjustable, the flow rate and the height of the water surface are adjustable, so that it can more accurately simulate the conditions of different main grooves and branch grooves, and different The process of landslides blocking rivers and forming barrier dams under the source level of tributary landslides, as well as the evolution process of outburst floods, are conducive to more comprehensive acquisition of the evolution law of the disaster chain of barrier dams, the formation characteristics and the data of the water supply characteristics of the outage. Improve the scientificity and accuracy of the research on the formation process of the barrier dam and the failure mechanism of the barrier dam.

The invention provides a combined type multifunctional experiment tower and an experiment device thereof. The experiment tower is assembled by a tower kettle segment, a plate type tower segment, a filler tower segment, a condensing tower segment, an entrainment test tower segment and a plurality of closing plates. The experiment device is formed by the connection of the experiment tower, a gas bomb, a fan, a recirculation tank and a flowmeter by a conduit, a valve, and the like. The experiment device can realize the cold-hot die rectification experiment technological process by switching the valve, and the experiment technological process is very convenient to convert. The absorption and desorption experiment technological processes further can be realized by the reassembly of the tower segments and the connection between the tower device and the external equipment, so that the research field of the absorbent is widened. The experiment device is modularized in structure, convenient toinstall, and strong in experiment function, can run under the condition of the water and the electricity, can be used for performing the on-line research of the tail gas recovery in chemical factories such as the oil refinery, the coal chemical factory and the like, and can be used for treating the wastewater which is more dispersed and is small in quantity in the oil extraction factory and the like.

The invention discloses a roadbed slope retaining structural object large-scale model test loading system. The horizontal loading system is composed of a reaction wall, servo loading cylinders, loading plates, guide rods and anchor ropes. The reaction wall is embedded into a foundation, the two anchor ropes are arranged on the top of the reaction wall for reinforcement, the multiple servo loading cylinders are installed on the above-ground portion of the reaction wall, one end of each servo loading cylinder is connected with the corresponding loading plate, and the guide rods are arranged between the reaction wall and the loading plates. By means of horizontal loading, the magnitude of force transmitted to a structural object and the distribution mode of the force can be clearer. Gradation loading is achieved through a servo loading system, the real stress state of a soil body can be more accurately presented again, and more real experimental data can be conveniently obtained. The reaction wall is embedded into the soil body and reinforced by the anchor ropes, displacement is well controlled, the influence on the environment is small, and the manufacturing cost is low.

The invention relates to an atmosphere control device for nuclide migration research, which belongs to the technical field of radioactive waste treatment. There is a balance solution, and the sample stand is placed on the inner steps of the glass bottle; the sample bottle containing the experimental solution is placed in the sample slot on the upper end of the sample stand, and the bottle has a built-in platinum electrode; The sealing cover is fixedly connected; the conductor is connected to the platinum electrode through the wire; the lower end of the air inlet pipe is connected to the lower air pipe, and the other end of the lower air pipe is immersed in the equilibrium solution; the top of the material channel and the exhaust pipe are fixed in the operation pipe, and the bottom end of the material channel is immersed in the experimental solution. The atmosphere control device provided by the invention can be flexibly applied to different working scenarios, enhance the purity of the experimental atmosphere to ensure the authenticity and reliability of the experimental data, in addition, the materials are cheap and easy to obtain, and the disassembly is simple and convenient for placement.

The invention discloses an air bag type floating loading mechanism, and belongs to the technical field of bridge experiment equipment. The invention discloses an air bag type floating loading mechanism which comprises a loading main body, a loading wheel, a rolling wheel, an air bag and a pressure sensor, the loading wheel is arranged on the upper surface of the loading main body; a first central shaft of the loading wheel is parallel to the upper surface and is vertical to the length direction of the loading main body; the loading wheels comprise a first loading wheel and a second loading wheel, the first loading wheel is located at the left part of the upper surface, and the second loading wheel is located at the right part of the upper surface; the rolling wheel is arranged on the lower surface; a second central shaft of the rolling wheel is parallel to the first central shaft; the air bag is arranged between the first loading wheel and the upper surface; the pressure sensor is connected between the second loading wheel and the upper surface. The air bag type floating loading mechanism is used in bridge durability wheel load experiment equipment, a loading wheel is in floating uniform force contact operation with a track, and a plurality of rolling wheels are in floating uniform force contact operation with a bridge floor; and the application range of the loading vehicle is expanded.

The invention discloses a high-speed spinning cup internal flow field dynamic pressure wireless measuring device. An electromotor is connected with a rotation shaft through a coupler. The rotation shaft is connected with a spinning cup firstly through threads and then through a split pin. A gasket installation hole is formed at the upper end of inner threads in the center of the spinning cup. A trigger hole is formed at the upper end of the gasket installation hole. A wireless sensor is installed in an installation hole at the upper end of the rotation shaft. The wireless sensor abuts against the lower surface of the trigger hole through a gasket. A trigger head of the wireless sensor penetrates through the trigger hole in the spinning cup to be flush with the upper surface of the trigger hole. A receiver is placed on a test bench. The wireless sensor is connected with the receiver in a wireless mode through the Wi-Fi. According to the high-speed spinning cup internal flow field dynamic pressure wireless measuring device, a high-speed spinning cup internal flow field is directly measured through the wireless sensor, and test data are true and reliable. Due to the fact that the trigger head of the wireless sensor is flush with the upper surface of the spinning cup, the structure of the high-speed spinning cup internal flow field will not be influenced. Signals received through the receiver are analyzed, the structure and the change mechanism of the high-speed spinning cup internal flow field are searched, and a test device and a measuring method are provided for follow-up research.

A multi-functional medium-sized animal breeding isolation system relates to an isolation system for breeding medium-sized animals in a controllable microenvironment. The isolation system comprises an isolator cover body (2), a ventilating equipment unit (1), a camera system (3), a television entertainment system (4) and an automatic control system which is composed of a control box (6), a rotatable support bar (7), a touch screen (8) and an alarm indicator light (9); and a transparent plate of a front door (41) is provided with a glove and oversleeve system (58), a cage orbit and a pulley (55) which are fixed on an inside base as well as an animal cage (54). The isolation system is characterized in that: the ventilating equipment unit (1) comprises two (one operation, one standby) air exhaust fans (22) and an air intake fan (25); one side of the cover body is provided with a DPTE350alfa transfer door (42) for transferring experimental supplies or animals; and the lowest step at the bottom is provided with a DPTE270alfa transfer door (44). The medium-sized animal breeding isolation system can breed different animals infected by pathogen or clean animals, and can also realize a plurality of functions such as disinfection effect evaluation and the like.

The invention discloses a test coating machine for a sensitive material. A machine body comprises a horizontal frame body and a vertical frame body, wherein the horizontal frame body is sequentially provided with a coating operating platform, a vacuum negative pressure system and a horizontal condensing box; the vertical frame body is sequentially provided with a fixed main driving roller device,a slice ring correcting device and a driven roller tensioning mechanism along the horizontal direction, a slice ring joint detection infrared photoelectric switch is adjacent to the main driving roller device; the top of the vertical frame body is fixedly connected with a fixed frame of an electric control system; and an emulsion supply system is arranged adjacent to the coating operating system.The invention adopts a horizontal slice ring operating mode different from the traditional vertical or reeling in and out type test coating machine, and has the characteristics of small volume, smalloccupation, complete function, advanced configuration, flexible operation, high automatism, low cost and the like.

The invention discloses a microelectrode system and method for testing an oxygen mass transfer coefficient of a proton exchange membrane. The system comprises an electromagnetic shielding box, an on-off type temperature controller and an environment cavity formed in the electromagnetic shielding box; atmosphere can be continuously introduced into the environment cavity, and humidity can be monitored; a high-temperature-resistant clamping device, a platinum disc microelectrode with the effective diameter being 10 micrometers, a platinum sheet electrode, a silica gel heating plate and a temperature sensor are arranged in the environment cavity; the clamping device is used for sequentially superposing and clamping the proton exchange membrane to be detected, the platinum sheet electrode and the silica gel heating plate; the on-off temperature controller is connected with the silica gel heating plate, the temperature sensor is used for monitoring the temperature of the silica gel heating plate, the platinum disc microelectrode serves as a working electrode, and the platinum sheet electrode serves as a counter electrode and a reference electrode and is connected to the electrochemical workstation. According to the system and the method disclosed in the invention, the mass transfer coefficient of oxygen in various polymer electrolytes can be quantitatively and accurately characterized, and quantitative guidance is provided for optimization of a catalytic layer structure.