58results about How to "Good experimental environment" patented technology

The invention provides a method for measuring shearing area of a rock structral plane in a direct shear test. The method comprises the following steps of: collecting an image; cutting and filling the image; converting the image into a grayscale image; selecting a gray threshold according to the obtained grayscale image of the rock structral plane; converting the grayscale image of the rock structral plane into a black and white binary image on the basis of the selected gray threshold; calculating percentage, namely percentage of the shearing area of the rock structral plane in the direct shear test, of the area of a white part in the area of the whole image; figuring out total actual area of the rock structral plane through using a graduated scale adopted during shooting as a reference object; and figuring out the shearing area of the rock structral plane in the direct shear test. According to the invention, defects of complicated operation, complicated steps, low working efficiency, large manual error and the like in the traditional measuring method can be solved; moreover, as the operation is simple, an important practical significance is obtained in reducing workloads of geologists, improving measuring accuracy and increasing working efficiency; meanwhile, as lower cost is achieved, the method for measuring the shearing area of the rock structral plane in the direct shear test, provided by the invention, is easy to be popularized.

The invention discloses a semi-physical simulation experiment system. The semi-physical simulation experiment system comprises a management layer, a control layer and a device layer. The management layer is composed of a plurality of emulation computers and is used for setting, displaying and managing an environment and parameters of a simulation experiment. The control layer is composed of a plurality of programmable logic controllers (PLC) and is used for achieving data collection, control loop regulation, sequential control, logic control and comprehensive alarm. The device layer is composed of a plurality of object devices, an imitation screen and input / output signals, and the object devices comprise sensors and actuators. A figurative expression of the system control flow chart of the imitation screen and the input / output signals are simulation input and output of a detection signal and an actuating signal of the system. The control system is downward directly connected with the sensors and the actuators of the devices layer. The input / output signals are upward connected with the emulation computers of the management layer through the network. The collected data and state signals of the object devices are transmitted to the emulation computers.

The invention provides a dye penetration inspection apparatus and a dye penetration inspection method. The apparatus comprises a workbench and an injection bench; the workbench comprises a peripheral pedestal and a supporting body at the center of the pedestal; the surface of the supporting body is provided with a translational guide rail; a pallet is disposed on the translational guide rail; the injection bench is disposed at the side of the opening of the pedestal, and comprises a rotating disk and a stepping motor; a position sensing switch is disposed on the stepping motor and used to output the position signal of a reagent bottle to a PLC controller controlling the rotation of the stepping motor; a pick-up head is disposed above the supporting body; a cleanable special pattern is coated at the center of the upper surface of a sample; and the pick-up head acquires the image of the sample, an image processing module makes the translational guide rail move according to the position of the special pattern, and thus the sample is sent to a predetermined spraying position. The dye penetration inspection apparatus and the dye penetration inspection method help to realize automation of dye and inspection and reduce pollutions to environment.

The invention discloses a diffuser and flame tube optimal matching experimental research device which comprises an electric driving device, and further comprises an air inlet channel, an air compressor, a diffuser, a combustion chamber and an air outlet which are connected in sequence, and the diffuser and flame tube optimal matching experimental research device is used for simulating the sectionsof the air inlet channel, the air compressor and the combustion chamber of a typical gas turbine engine. The diffuser and flame tube optimal matching experimental research device can flexibly replacedifferent impellers and diffusers to set different inlet parameters for experimental simulation, so that the research of optimal matching between the low-loss diffuser and the flame tube becomes practical. Through the adoption of the diffuser and flame tube optimal matching experimental research device, the relation between an actual upstream inflow condition of the flame tube and the performanceof the flame tube can be researched, the influence rule of diffuser design on the flow field organization, flow distribution and combustion performance of the flame tube and a head is mastered, a low-loss diffuser optimization method and an optimal matching method with the flame tube and the head are formed, and therefore the diffuser and flame tube optimal matching experimental research device is of important significance in realizing advanced combustion organization of the flame tube.

The invention discloses a magnetic stirring constant-temperature ventilation incubator comprising a box body as well as a control panel, a control microcomputer and an air-conditioning system which are arranged on the box body, wherein a clapboard in the box body is placed horizontally and is connected with a heat insulation shell of the box body to form an independent culture room; a ventilating fan and a temperature sensor connected with the air-conditioning system are arranged in each layer of culture room respectively; a function switching key interface is arranged on the control panel corresponding to the culture room of each layer; and the clapboard is formed by a magnetic carrier platform with a three-layer structure, the upper layer is a carrier flat plate prepared from a non-magnetic material, the middle layer comprises magnetic coils which are uniformly distributed transversely and horizontally, and the lower layer is a magnetic flat plate capable of carrying the magnetic coils. The magnetic stirring constant-temperature ventilation incubator disclosed by the invention makes use of the rotating magnetic field of the magnetic carrier platform to drive a rotor in a fermentation container to rotate so as to realize a mixing effect, so that the magnetic stirring constant-temperature ventilation incubator is particularly suitable for culturing filamentous fungi which are high in concentration and relatively large in viscosity and can form spheres easily.

The invention discloses a control system for surface air speed of a fume hood. The control system comprises a displacement sensor, a PID (proportion, integration and differentiation) controller, an air valve driver, a speed reducer, a butterfly valve, a micro-control unit, an input keyboard, a display device and a warning device, electric signals inputted by the displacement sensor are compared with preset surface air speed parameters corresponding to the opening height of a surface window, required air exhaust speed data for maintaining the negative pressure in the fume hood are generated, transmitted to the micro-control unit and converted into control signals, the control signals are transmitted to a control signal input end of the air valve driver via a signal output end, and the air valve driver drives the butterfly valve via the speed reducer to regulate the exhaust air rate in an exhaust pipeline. By the aid of the control system, the opening size of the surface window and the surface air inlet speed are regulated in a linkage manner. The invention further discloses a control method implemented by the aid of the control system.

The invention discloses a digital experimental system based on a universal serial bus (USB) and a virtual instrument. The digital experimental system comprises a computer, a digital circuit experimental instrument module and an experimental chip, wherein the computer and the digital circuit experimental instrument module communicate through a USB port signal line and supply power to a digital circuit experimental instrument system and the experimental chip through a USB port of the computer; and a connecting line between the digital circuit experimental instrument module and the experimental chip is a standard C2 self-locking connector. By employing the digital experimental system based on the USB and the virtual instrument, a microcomputer serves as the basis, an integrated test platform is constructed, a conventional instrument is replaced, the requirements of electrician and electronic experiment teaching are met, the microcomputers can serve as computers for other computer course teaching, the equipment utilization rate is greatly improved, the resource sharing is realized, the experimental construction cost is reduced, and due to the introduction of the virtual instrument, an experimental teaching mode of combining the actual operation and the computer simulation is determined.

The invention provides a preparation method for electroplating dispersing agent nickel coated aluminum powder and relates to a preparation method for an electroplating dispersing agent. According to the preparation method, nickel sulfate serves as main salt, sodium monophosphate serves as a reducing agent, sodium citrate serves as a complexing agent, citric acid serves as an accelerator, thiourea serves as a stabilizer, and pH is adjusted through ammonia water. Nickel is plated on the surface of the particle size micron aluminum powder in a nickel sulfate system in a chemical plating method, the formed nickel coated aluminum powder can serve as a dispersing agent for next composite plating, and a foundation is laid for later composite nickel plating on a base part. Good experiment environments are provided for high-temperature coating experiments, not only is a novel method for preparing a high temperature protection coating exploited, but also the method can be popularized to preparation of other covering type high temperature protection coatings by adopting a composite plating method and a thermal reaction diffusion technology and is of great significance for reducing production cost, improving economic benefit and expanding applications of new materials.

The invention discloses a high-stability centrifugal machine pedestal for a laboratory. The high-stability centrifugal machine pedestal for the laboratory comprises a pedestal; the top of the pedestalis fixedly connected with a first shaft block; the front side of the first shaft block is rotatably connected with a connecting rod; one end of the rotating rod is rotatably connected with a pressurerod; the surface of the pressure rod is in sliding connection with a first casing pipe; one end of the pressure rod is fixedly connected with cushions; each of the opposite sides of the two cushionsis fixedly connected with a first spring; one end of the connecting rod is fixedly connected with a supporting plate through a second shaft block; and the front side of the pedestal is fixedly connected with a second casing pipe. The invention relates to the technical field of biology. The high-stability centrifugal machine pedestal for the laboratory solves the problem of vibration of the centrifugal machine caused by high rotating speed of the centrifugal machine during work, reduces noise caused by vibration, has high stability, eliminates a certain potential safety hazard, improves the experimental environment, is favorable for conduction of the experiment, and guarantees the experimental result.

The invention discloses an air purifying device of a computer for medical experiments. The air purifying device comprises an intake air filtering unit and a negative ion purifying unit, wherein the intake air filtering unit is installed at an air inlet of the computer and used for filtering air entering a computer case, and the negative ion purifying unit is installed at an air outlet of a computer power supply and used for removing harmful microbes and electrolyzing harmful substances with small particle sizes. The intake air filtering unit is provided with a miniature fan used for supplying air into the computer case to keep the interior of the computer case in a positive-pressure state. The outside air passes through the air inlet of the computer, the intake air filtering unit, a computer mainboard area and the negative ion purifying unit in sequence and then flows out of the computer case. The air purifying device has the advantages of being reasonable in design, easy to maintain, and capable of thoroughly eliminating damage of dust to the computer, obviously improving the stability of the computer, obviously prolonging the service life of the computer, quickly removing PM 2.5, formaldehyde, peculiar smells, smoke, viruses, bacteria and other harmful substances, effectively purifying air and improving experimental environments.

The invention relates to a preparation method and application of a high-performance nitrogen-doped biomass oxygen reduction catalyst. The black fungus biomass material is treated, the invention provides a simple, convenient and efficient preparation method of the non-noble metal oxygen reduction catalyst, the non-noble metal oxygen reduction catalyst which is low in cost, high in activity and capable of being prepared on a large scale is finally controllably synthesized by regulating and controlling two steps of nitrogen doping and pore forming, and the catalyst is applied to a hydrogen-oxygenfuel total battery.

The invention relates to a small microbial electrolysis cell and application thereof. The electrolysis cell includes a flange, electrodes, copper bars, a microbial electrolysis cell reactor, an aeration plate and a stirring bar. Tiny aeration holes are uniformly formed in the aeration plate to allow gas bubbles to uniformly enter an electrolyte during N2 charging, so that the phenomenon that sudden gas expansion during N2 charging leads to unstable aeration, corrosion of the copper bars by the solution, and influence on the experiment effect is avoided. The electrodes are inserted into electrode clamping grooves in the upper surface of the aeration plate, electrons are supplied by an external electric field, and a DO or pH probe regularly passes through a through hole in the flange and fixed in a probe clamping groove in the center of the aeration plate, so that the DO or pH value of a reaction system can be monitored in real time. The microbial electrolysis cell can achieve stable and efficient degradation of perchlorate in water bodies.

The invention relates to a fluid mechanics experimental device, which comprises an experimental platform, an experimental platform bracket, a water supply tank system, a measuring pipeline system, a water collecting tank system and a collection reflux system. The measuring pipeline system comprises an experimental pipe, pressure gauges, a flow adjusting valve and a pipeline fixing bracket; the experimental tube is mounted on the experimental platform through the pipeline fixing bracket; the pipeline fixing bracket is mounted on the experimental platform in a position adjustable mode; the experimental pipe comprises a straight pipe and a measuring pipe; the straight pipe communicates with the water supply tank system and is detachably connected with the measuring pipe; the two or more pressure gauges are arranged on the experimental pipe and are located on pipelines on the two sides of the measuring pipe correspondingly; and the flow adjusting valve is arranged on the straight pipe. Compared with the prior art, the fluid mechanics experimental device has the advantages that the measuring pipeline is convenient to replace, acquisition of experimental data is accurate and efficient, the using process is simple, safe and reliable, and the collection reflux system is arranged, so that waste consumption is reduced.

The invention relates to a rotating magnetic field generating device based on a permanent magnet, the device comprises a driving mechanism, a first bracket, at least one permanent magnet, and a secondbracket, wherein the driving mechanism drives the first bracket to rotate, the at least one permanent magnet is mounted on the first bracket, and a receiving seat is mounted on the second bracket, and the receiving seat is located in a magnetic field formed by the at least one permanent magnet. The positions of the first permanent magnet, the second permanent magnet and the receiving seat can beadjusted, facilitating the formation of magnetic fields of different directions and intensities, the magnetic fields are stable and reliable, at the same time, the first permanent magnet and the second permanent magnet are driven by the step motor, Industrial cameras can capture clear images at different mounting heights, which is easy to operate, cheap in cost, excellent in performance and stability, and greatly improves the experimental environment of the current magnetic-controlled flexible robots, simplifying the experimental research in the field of magnetic-controlled flexible robots andon the like.

The invention discloses a control system for a machine tool rolling functional component precision retaining ability measurement device. An industrial control computer is arranged on a force application component servo motor (701), and an eight-axis PMAC card is installed inside the industrial control computer. The control system is used for accomplishing machining path input, setting of tool parameters and cutting parameters, total cutting force calculation, total cutting force time curve drawing, total torque calculation and total torque time curve drawing; cutting component force in the X-axis direction, cutting component force in the Y-axis direction and cutting component force in the Z-axis direction are calculated, a time curve of the cutting component force is drawn, the cutting component force in the X-axis direction, the cutting component force in the Y-axis direction, the cutting component force in the Z-axis direction and the total toque are combined to be decomposed to all servo shafts, the component force time curve of each servo shaft is calculated, and the time curve is divided by the spring coefficient K on a force application mechanism to obtain the time displacement curve of each servo shaft. During operation of a control program, the displacement value of each servo shaft is output to a control PMAC axis control card through a lock widget, the PMAC card calls a corresponding motion control program, the servo motor is controlled to move to the corresponding displacement point, and needed force is applied.

The invention discloses an automatic detection and transmission machine of concrete test blocks. The machine comprises a transmission device, a detection device, a lifting device and a power device, wherein the transmission device is positioned below a rack and used for transporting the concrete test blocks; the detection device comprises a visual camera, the visual camera is positioned on the rack and used for shooting the concrete test blocks on the transmission device and identifying the size information of the concrete test blocks; the lifting device is positioned at the downstream position of the transmission device and used for lifting the concrete test blocks transported from the transmission device and transporting the concrete test blocks to the upper surface of a test table; andthe power device is connected with the transmission device and the lifting device and used for providing power for the transmission device and the lifting device. According to the machine, the transmission device and the lifting device can replace manual work to complete the process of transporting the test blocks from a stacking area to the test table, and the detection device can directly measure the precise sizes of the concrete test blocks to judge whether the concrete test blocks meet the requirements, so that the labor cost is reduced, the experimental testing process is accelerated, andthe test environment is improved.

The invention discloses a return type satellite with a high-level microgravity environment. The return type satellite with the high-level microgravity environment comprises a return capsule, a brake capsule, a service capsule and a sealed capsule. A lower sealed roof of the bottom of the sealed capsule is of an outwards-convex circular curved thin-shell structure. Six attitude-control thruster mounting holes are formed in the peripheral edge of the lower sealed roof. An attitude-control thruster mounting support is welded to the outer edge of each mounting hole. The thrusting force of each attitude-control thruster is not larger than 2N. A constrained damping layer is arranged on the outer edge of each mounting support and formed by bonding a constraining layer and a damping layer together. Each constraining layer and the corresponding damping layer are circular rings with the same size. A micro-vibration source on the satellite is arranged in the service capsule. Microgravity experimental loads are arranged in the return capsule and the sealed capsule. At least five bolt connection links are arranged between the micro-vibration sources and the microgravity experimental loads. The return type satellite with the high-level microgravity environment focuses on solving the disturbance to the return type satellite microgravity link by the attitude-control thrusters and a fluid circuit system, and the instant micro-vibration and micro-vibration environment of the return type satellite are improved greatly.

The invention relates to a cloud intelligent automobile power assembly test system. The system comprises a cloud server which is in wireless communication connection with a computer software platform through a network interface; a computer software platform, comprising automobile dynamics simulation software, road information simulation software and information interaction software, and the computer software platform being connected with the master controller and the execution motor controller through CAN buses; a power assembly test bench, comprising an automobile power source, an integrated gearbox, a load dynamometer and a master controller, the integrated gearbox comprising a gearbox, an execution motor and an execution motor controller, and the integrated gearbox being detachably connected with the automobile power source and the load dynamometer. The master controller is connected with the automobile power source and the load dynamometer through a CAN bus. Compared with the prior art, the system has the advantages that a user can remotely supervise the experiment process and result, the experiment environment of researchers is improved, the experiment efficiency is improved, and the like.

The invention relates to a material strength measurement device. The device of the present invention comprises a machine body and a concrete block transporting cavity disposed in the machine body; a measurement sliding cavity is formed at the center of the concrete block transporting cavity in a communicated manner; a squeezing rod is disposed in the measurement sliding cavity; a measuring assembly is disposed in the squeezing rod; the measurement sliding cavity is provided with a connecting rod rotation cavity in a communicated manner; a squeezing driving assembly is arranged in the connecting rod rotation cavity; the squeezing driving assembly drives the measuring assembly to squeeze a concrete block; the measuring assembly measures the compressive strength of the concrete block; and a pushing plate sliding cavity is arranged to the left side of the measurement sliding cavity. The device has the advantages of full-process mechanic transmission matching, high speed, coherent matching,improved working efficiency, simple operation and high automation degree. With the device adopted, personal safety can be ensured, and an experimental environment can be protected.

The invention relates to a suspension bracket test tool, in particular, a suspension bracket dynamic impact test tool. The suspension bracket dynamic impact test tool includes a suspension bracket mounting base for mounting a suspension bracket, an impact transmission shaft which is installed on and is matched with the suspension bracket, an impact bearing structure and a limiting structure; the impact bearing structure includes two supporting plates which are located at two sides of the suspension bracket and are connected with the impact transmission shaft and a web connecting the two supporting plates together; and the limiting structure is used for limiting the rotation of the impact bearing structure and is located between the suspension bracket mounting base and the impact bearing structure. With the suspension bracket dynamic impact test tool of the invention adopted, individual bodies can be tested at the early stage of product development, and impact failure deformation and mechanical properties of the individual bodies in a vehicle collision process can be obtained.

The invention discloses a control system for surface air speed of a fume hood. The control system comprises a displacement sensor, a PID (proportion, integration and differentiation) controller, an air valve driver, a speed reducer, a butterfly valve, a micro-control unit, an input keyboard, a display device and a warning device, electric signals inputted by the displacement sensor are compared with preset surface air speed parameters corresponding to the opening height of a surface window, required air exhaust speed data for maintaining the negative pressure in the fume hood are generated, transmitted to the micro-control unit and converted into control signals, the control signals are transmitted to a control signal input end of the air valve driver via a signal output end, and the air valve driver drives the butterfly valve via the speed reducer to regulate the exhaust air rate in an exhaust pipeline. By the aid of the control system, the opening size of the surface window and the surface air inlet speed are regulated in a linkage manner. The invention further discloses a control method implemented by the aid of the control system.

The present invention proposes a colored penetrating flaw detector, comprising: a workbench and a jetting platform; the workbench includes a peripheral base and a carrier in the middle of the base; a translation guide rail is arranged on the surface of the carrier, and a tray is placed on the translation guide rail; The spray table is arranged on one side of the fully open side wall of the base, and includes a turntable and a stepper motor; the stepper motor is provided with a position sensing switch, which outputs the position signal of the reagent bottle to the PLC controller, and the PLC controller Control the rotation of the stepping motor; a camera is arranged above the carrier, and the center of the upper surface of the sample is coated with a special pattern that can be cleaned. The camera collects the image of the sample, and the image processing module controls the The translation rail moves to transport the sample to the predetermined spraying position. The colored penetrant flaw detector and the automatic colored penetrant flaw detection method of the present invention realize the automation of colored flaw detection and reduce the pollution to the environment.

The material degradation monitoring system includes a base plate; a test chamber located on the base plate; a material holding unit located on the base plate and spaced apart from the test chamber, the material holding unit being capable of holding at least one material to be tested; a material transfer unit located proximate to the material holding unit and test chamber; and a controller that directs the transfer unit to move the material holding unit to the test chamber.

The invention discloses a full-automatic diamond cobalt plating machine which comprises a base, a cobalt plating cylinder stirring mechanism, a cobalt plating cylinder lifting mechanism, a detachable installation support, a temperature control system, an electrode reaction system and a liquid level control system. The cobalt plating cylinder lifting mechanism is arranged on the base. The cobalt plating cylinder lifting mechanism is arranged between the base and the cobalt plating cylinder stirring mechanism. The temperature control system, the electrode reaction system and the liquid level control system are arranged on the detachable installation support. The cobalt plating cylinder stirring mechanism comprises a lifting plate, a motor and a cobalt plating cylinder. The right side of the lifting plate is hinged to the base, and the cobalt plating cylinder lifting mechanism is arranged between the lower portion of the left side of the lifting plate and the base. The left end of the cobalt plating cylinder is provided with a cylinder opening, and the right end of the cobalt plating cylinder is connected with the motor through a shaft connecting piece. Multiple supporting wheels are arranged below the cobalt plating cylinder and are fixed to the upper surface of the lifting plate. By means of the full-automatic diamond cobalt plating machine, cobalt plating can be achieved on a diamond surface, and automatic work and monitoring of various parameters in the whole process can be achieved.

The invention discloses a field temperature-increasing and rainfall experiment device, which comprises a temperature-increasing cover, an element box and a water storage tank. Stretching design, the six corners of the heating cover are fixedly connected by stretching blades, the top of the heating cover is provided with a shrinkage hole, and the inner surface of the shrinkage hole is fixedly connected with a ring sprinkler, the ring sprinkler The input end of the connecting pipe is communicated with a connecting pipe, and the end of the connecting pipe far away from the annular sprinkler is connected with the inside of the water storage tank. The present invention relates to the technical field of field temperature increase and rainfall experiments. In this field heating and rainfall experiment device, the blades are stretched to make the obturator of the heating cover into a shrinkable hole that can be adjusted freely, which makes it more convenient for the user to adjust the obturator during the experiment, saves a lot of time and energy, and at the same time utilizes The setting of the water storage tank can be used in remote areas after directly filling the inside of the tank body with water, increasing the applicable area.

The invention relates to an air pressure stabilizing system and a method for controlling pore water pressure in a coal-rock mass creep test, and belongs to the technical field of coal seam tests. Thesystem is mainly composed of a gas cylinder, an outlet pressure reducing valve, an automatic regulating solenoid valve, a sensor, a signal processor, a pneumatic valve, an exhaust port and a reactionkettle. According to the system, the thought of feedback regulation is applied, an air pressure signal in the reaction kettle is transmitted through a sensor, and the air pressure signal is convertedinto a control instruction through a signal processor to control opening and closing of the automatic regulating solenoid valve, and the automatic regulating solenoid valve controls opening and closing of the pneumatic valve, and then the pressure in the reaction kettle is controlled. The system is reliable in operation, simple in structure and convenient to operate, and can provide stable confining pressure for a creep experiment of the coal and rock mass under the action of using water as a medium.

The invention provides a brake caliper self-adjusting screw sleeve high pressure air tight detection clamp, which comprises a clamp base plate. The clamp base plate is provided with a bearing support and a lower sealing seat. The bearing support is provided with a vertical guide post and a horizontal guide post. The upper end of the vertical guide post and the back end of the horizontal guide post are equipped with a vertical cylinder mounting plate and a horizontal cylinder mounting plate to have a cylinder installed. The vertical guide post is also equipped with a moveable sliding plate with an upper sealing head. The horizontal guide post is also provided with a horizontally locking slide plate, a horizontally locking baffle plate, a spring positioning sleeve return spring and a limit lever. The horizontally locking slide plate and the horizontally locking baffle plate are provided with a clamp locking sleeve. The lower sealing seat is provided with a test component fixing sleeve. In the invention, a float locking mechanism is adopted to not only avoid the mechanism requiring the hydraulic pressure in the up-pressure process but also to make convenient clamping and save space. The combination of the test component fixing sleeve and material unloading cylinder realizes the function of easy clamping of the test component and convenient unloading of materials. In the testing process, high pressure gas replaces hydraulic pressure, which not only improves the experimental environment but also eliminates the cleaning of the test component after the test.

The invention discloses a heating device for physical and chemical experiments. The heating device comprises an experiment box, an external temperature control device, a heating table, a heating device, a sliding device and a temperature control early warning detection device, wherein the external temperature control device is arranged at the inner side corner of the experiment box; the heating table is arranged at the inner side of the external temperature control device; the heating device is arranged on the heating table; the bottom is connected with the experiment box through a sliding device. The temperature control early warning detection device is arranged inside the experiment box, and consists of a temperature sensor, a controller, a warning indication lamp and an electronic temperature indicator; the temperature sensor is positioned at the bottom of the experiment box and is electrically connected with the warning indicating lamp and the electronic temperature indicator through the controller; the experiment box is arranged at the outer side of the heating equipment for performing isolation on a heating appliance at the inside; the safety of the heating equipment can be improved; the influence caused by outside on the heating process can be reduced.

The invention provides a low-pressure oxygen cabin for experimental animals. The low-pressure oxygen cabin is characterized in that a water dispenser is communicated with environment air flow in the cabin. The low-pressure oxygen cabin has the advantages that the structure is simple, the operation is convenient, and the experimental animal soaking caused by water overflowing of the water dispenser can be avoided.