73results about How to "Meet different experimental needs" patented technology

The invention relates to a fatigue experiment device for a deepwater stand pipe, which is characterized by comprising a main cylinder barrel, an axial loading cylinder, a stand pipe test piece assembly, transverse servo loading cylinders and soil action servo loading cylinders, wherein the top of the main cylinder barrel is provided with an external pressure joint and an air vent valve; two ends of the main cylinder barrel are respectively connected with the axial loading cylinder with an axial force joint; two ends of the stand pipe test piece assembly are respectively hinged on a piston of the axial loading cylinder on the corresponding side; the stand pipe test piece assembly comprises a test piece body and a connecting rod, wherein simulated soil is arranged below the test piece body,two ends of the test piece body are respectively provided with an internal pressure joint, and the test piece body is provided with a plurality of sensors; a test lead of each sensor penetrates out of the main cylinder barrel to be connected with the test instrument; each transverse servo loading cylinder and the soil action servo loading cylinders are all arranged on the main cylinder barrel; the pistons of two transverse servo loading cylinders are supported on the top of the test piece body; the piston of the other transverse servo loading cylinder is supported on the bottom of the junction of the test piece body and the connecting rod; and the piston of each soil action servo loading cylinder is supported on the bottom of the simulated soil.

The invention discloses a coal-bed gas well shaft drainage gas recovery visual simulation experiment device which comprises a shaft simulation device and a moveable bracket, wherein an upper connector and a lower connector with release valves are respectively arranged at two ends of the shaft simulation device; the upper connector is connected with a first one-way valve, a liquid injection valve, a liquid injection flowmeter and a water pump in sequence; the lower connector is connected with a fluid meter and a draining valve in sequence; the lower connector is connected with a second one-way valve, a main gas injection valve, a gas-liquid separator, a large flow valve, a vortex shedding flowmeter, a pressure gauge, a pressure adjusting valve , a gas storage tank valve, a gas storage tank and an air compressor in sequence; the gas-liquid separator is in secondary connection with the pressure gauge through a parallel connected pipeline; a rotor flowmeter and a small flow valve are arranged in sequence on the parallel connected pipeline; the shaft simulation device comprises a transparent pressure-resistant glass tube and a multi-section type central tube. The invention further provides a coal-bed gas well shaft drainage gas recovery visual simulation method. By adopting the coal-bed gas well shaft drainage gas recovery visual simulation experiment device and the coal-bed gas well shaft drainage gas recovery visual simulation method, the flowing state of multi-phase flow inside a coal-bed gas well in any shaft deflection and deflection stabilizing section can be simulated.

The invention discloses preparation and application of a block polymer electrolyte and relates to the technical field of electrolytes for lithium-ion batteries. Block polymerization is carried out through a chemical method to prepare the block polymer electrolyte with different soft-hard segment ratios. A rigid isocyanate group molecular chain compound is built to improve the mechanical property and the thermal stability of the block polymer electrolyte as a skeleton and to provide certain ion channels; and a flexible hydroxyl group molecular chain compound is capable of improving the ion conductivity and the ion migration number of the polymer electrolyte to improve the charge-discharge performance of a solid-state lithium-ion battery as a main ion channel of the block polymer electrolyte, and is also capable of improving the interface property of the solid-state lithium-ion battery. The block polymer electrolyte has the advantages of high interface stability, a wide electrochemical window, a wide operating temperature range and high room-temperature ion conductivity; and a product is small in shrinkage rate, diverse in shape and suitable for a lithium-ion polymer battery.

The invention provides a pH monitoring flat panel optrode fluorescence sensing film, as well as a preparation method and application thereof, and belongs to the field of monitoring of pH value two-dimensional distribution. The fluorescence sensing film is prepared from a fluorescent dye HPTS-lipo. In the preparation process, HPTS-lipo is embedded in a hydrogel D4. The fluorescent dye HPTS-lipo isprepared in such a way that a sulfonic acid group of the fluorescent dye HPTS-lipo is introduced in alkylamine. Based on modified fluorescent dye HPTS-lipo, and compared with a fluorescent dye HPTS, the pKA value is obviously increased, the fluorescence sensing film is suitable for monitoring different pH values, different experimental requirements are met, the fluorescent dye HPTS-lipo has higherhydrophobicity, and is kept for a longer time in an environment, and after embedding by the hydrogel D4, the problem of dye leakage is further solved.

The invention discloses a high-throughput microfluidic chip and a cell analysis device and method. The high-throughput microfluidic chip comprises a cell observation pool, a stimulant channel, a cell introduction channel, a buffer solution channel and a waste liquid channel, wherein the stimulant channel is connected with the opening of the cell observation pool, the cell introduction channel is connected with the side face of the cell observation pool, the connecting site is close to the opening, the buffer solution channel is connected with the bottom of the cell observation pool, and the waste liquid channel is connected with the opening of the cell observation pool. The cell analysis device comprises the high-throughput microfluidic chip, a signal collection device and electric proportional switching valves, and the channel inlet end of the high-throughput microfluidic chip is connected with independent electric proportional switching valves; the signal collection device is arranged at the cell observation pool and is used for collecting cell signals or imaging cells. The analysis method comprises the following steps: capturing cells, stimulating cells and releasing cells. The chip, the device and the method provided by the invention can be used for achieving high-throughput cell stimulation and analysis in multiple modes.

The invention relates to a multifunctional integrated special electrostatic spinning machine for a laboratory. The machine comprises a laboratory operating desk, an injecting mechanism, a receiving mechanism and an injecting angle adjusting mechanism; the injecting mechanism comprises a horizontal position adjusting unit and an injecting barrel; the injecting angle adjusting mechanism comprises a mounting frame, an adjusting supporting frame, adjusting vertical frames and angle adjusting hand wheels; the front end of the adjusting supporting frame is mounted on the mounting frame; the injecting mechanism is mounted on a bottom plate of the adjusting supporting frame; the adjusting vertical frames are symmetrically mounted at two sides of the adjusting supporting frame; gears which are engaged with arc-shaped adjusting holes in the adjusting vertical frames are mounted on two side plates of the adjusting supporting frame; the gears move in the arc-shaped adjusting holes through the angle adjusting hand wheels mounted on the outer sides of the gears; the receiving mechanism is composed of a receiving roller and a receiving plate. The multifunctional integrated special electrostatic spinning machine for the laboratory has the advantages that the injecting position and angle can be adjusted; the injecting materials of different physical performances apply; the experiment cost is small, the scientific layout of the laboratory is realized, and various receiving modes are brought.

The invention relates to an experimental device for physical simulation of natural fractures with pre-set media. The device comprises a base board, a side board I, a side board II, a wellhole side board and a sewing side board; a center part of the wellhole side board is provided with a wellhole spacing hole; a rubber ring and a wellhole are installed in the wellhole spacing hole; a center part of the sewing side board is provided with a disk spacing hole; a sewing assembly is installed inside the disk spacing hole. The invention also relates to a corresponding experimental method comprising following steps: installing a wellhole in the wellhole spacing hole in the wellhole side board; installing the sewing assembly in the disk spacing hole in the sewing side board; inserting and fixing clamping reeds in a spacing groove and a separating groove in a sewing inserting board; inserting the sewing inserting board in an insert seam II of an incliner and an insert seam I of a wedge insert slit; rotating the sewing disk so that a certain angle is formed between the sewing inserting board and the side board I or the side board II; a certain angle is formed between the sewing inserting board and the base board by rotating the incliner. The invention can accurately preset natural cracks and bedding in the core.

The invention discloses a contact type two-cylinder axis crossing angle automatic measuring device. The device is composed of a device platform, a detecting device and a driving device. The device platform has the functions of supporting and fixing. The device platform can effectively support the detecting device and the driving device. A radial circular grating is placed on the edge of the circumferential guide rail of the device platform to effectively automatically measure and control angular displacement. The device can be applied to test pieces of different sizes, has a wide application range, and can meet different experimental needs. The detecting device can monitor the magnitude of applied force in real time, is convenient for studying the mechanical properties of a joint surface,and has the advantages of simple installation method, clear principle, automatic control and easy operation.

The invention discloses an intravascular metal fully degraded high throughput simulation monitoring system based on a micro-fluidic chip. The system is primarily composed of a pump unit (4) which provides fluid power, a multichannel micro-fluidic chip unit (3) and a fluid collecting device (6) connected to the liquid outlet of the multichannel micro-fluidic chip unit. The shear force distributionof a metal wire model to the fluid in channels is simulated by adopting the micro-fluidic chip and a channel dimensional design of the characteristic micro-fluidic chip and an optimized channel fluidflow rate to ensure that the size of the fluid shear force of the fully degraded metal wire in the reaction channel reaches the effect of simulating the fluid shear force in the blood vessel in vivo,so that the technical problem that an existing evaluation means is long in experimental period and low in throughput is solved effectively.

The invention discloses a composite field membrane separation experimental facility suitable for a general flat sheet membrane element. The experimental facility comprises ultrasonic transducers with body structures and external body structures, and a high-voltage alternating-current pulse power supply, wherein each body structure is symmetrical up and down, and is characterized in that three independent closed cavities, namely an upper feed liquid cavity, a lower feed liquid cavity and a filter liquor cavity in a membrane element, are formed by an upper clamp plate, a lower clamp plate, an upper cavity wall, a lower cavity wall and the middle membrane element; the lower end of an upper conductive screw rod extends into the upper feed liquid cavity to be adjustably connected with an upper electrode plate, the upper end of the upper conductive screw rod extends outside the lower clamp plate to be connected with the high-voltage alternating-current pulse power supply, the upper end of a lower conductive screw rod extends into the lower feed liquid cavity to be adjustably connected with a lower electrode plate, and the lower end of the lower conductive screw rod extends outside the lower clamp plate to be connected with the high-voltage alternating-current pulse power supply; the upper cavity wall and the lower cavity wall are both of translational square frame structures formed by lap joint of four L-shaped wall plates. According to the experimental facility, the length, width and thickness adjustment of the cavity is realized, various types of membrane elements can be changed, the use is flexible and convenient, and the universality is good.

The invention discloses a device for measuring the variation of internal temperature during combustion of a polymer material. The device comprises a fixing seat for fixing a polymer material sample, flame-jet equipment for jetting flame onto the surface of the polymer material sample, and a digital recorder for measuring the internal temperature during combustion of the polymer material sample under the action of flame, wherein a thermocouple is embedded in the polymer material sample, and connected with the digital recorder through a thermocouple compensation wire. The device is relatively low in manufacturing cost and relatively simple to operate, and can be utilized for measuring and recording the dynamic variation of the internal temperature with time during combustion of the polymer material under the action of flame in an in-situ and real-time manner, and quantitatively expressing the impact of the behavior of material combustion into charcoal on heat transfer according to experiment data. Therefore, a brand-new quantitative analysis and expression method is provided for research on flame-retardant polymer materials.

The invention discloses a device for testing the tensile performance of a high polymer material. The device comprises an engine base, wherein stepper motors are mounted on the side surfaces of the engine base symmetrically; a transmission mechanism is mounted on the output shaft of each stepper motor; each transmission mechanism is movably connected with the engine base through a sliding mechanism; the side surface of each sliding mechanism is fixedly provided with a connecting rod; and the end of each connecting rod is connected with a mounting rack. According to the device for testing the tensile performance of the high polymer material, the experimental temperature is adjusted by a temperature adjusting device, the experimental humidity is adjusted by a humidity adjusting device, the adjusting capacity is high, different experimental requirements can be met, the completeness of experimental conditions is guaranteed, the experimental process is monitored by a monitoring device, the boundedness of manpower monitoring is avoided, the experimental process is convenient for a worker to know sufficiently, the experimental tension is monitored by a tension monitoring device, the monitoring is accurate, and convenience is provided for the work of the worker.

The invention provides a dialysis device. A fixed frame is arranged on the edge of an objective table of a magnetic stirrer, the fixed frame comprises a pillar and a cross beam, the cross beam is fixedly connected with the pillar through a screw support capable of moving along the pillar up and down, and the height of the cross beam is adjusted through adjustment of the position of the screw support on the pillar, so that positions of connecting mechanisms and dialysis bag clips are further adjusted, the position of a dialysis bag in a dialysis buffer solution is adjusted, and different experimental requirements can be met.

The invention discloses a mixed signal detection experimental device suitable for mechanical and electrical engineering. The device comprises a main board, a power module, a liquid crystal display (LCD) module, a motor control module, a PSoC5 (programmable system on chip) microprocessor module and a STM32F4 (scanning tunneling microscope) microprocessor module; the power module is used for providing power source for every electrical module of the device; the main board is configured with a dual-microprocessor slot; the PSoC5 microprocessor slot in a left half area is used for connecting the PSoC5 microprocessor module, the STM32F4 microprocessor slot in a right half area is used for connecting the STM32F4 microprocessor module; input and output pins of the PSoC5 microprocessor module and the STM 32F4 microprocessor module can enable double rows of contact pins to be connect with external equipment of the main board through connecting leads; the main board is connected with a plurality of external equipment and externally arranged interfaces. By adopting a dual-processor framework, the unique configurable simulative digital property of the PSoC5 is combined with the high performance, the real-time function and the digital signal processing property of the STM32F4, so that the required functions for the electronic system design of the mechanical and electrical engineering are covered.

The invention provides a suspension spinning mechanism and a microgravity rollover state simulation system, and relates to the technical field of on-orbit service and maintenance. The suspension spinning mechanism includes a spinning device, a rigid-flexible restraint conversion device and an angle and eccentricity adjusting device, wherein the spinning device is suitable for enabling a suspensiontarget to spin around a spin axis; the rigid-flexible restraint conversion device is suitable for the situation that the suspension mechanism and the suspension target are switched between rigid restraint and flexible restraint; and the angle and eccentricity adjusting device is suitable for adjusting the deflection angle and the eccentricity position of the suspension target. According to the suspension spinning mechanism, the spinning of the suspension target around the spin axis can be realized, the swing of the suspension target spin axis can be realized, and the rigid and flexible restraint states of the suspension target can be arbitrarily switched, thus the ground simulation of a possible attitude rollover state of an on-orbit fault satellite is realized.

The invention discloses a multipurpose material storage device for laboratory, which comprises a plurality of containers used for containing experimental materials and a box body used for storing the containers, the box body comprises a lower box body and a box cover covering the lower box body in a sealed mode, an air inlet is formed in the lower box body, and a quick connector is arranged on the outer side of the air inlet. A quick coupling of the air inlet is communicated with a compressed air source through a pipeline, the container comprises a lower shell and an upper cover covering the lower shell in a sealing manner, a pressurizing port is formed in the upper cover, and controllable one-way valves which are positively conducted from outside to inside are respectively arranged at the air inlet and the pressurizing port. The compressed air source inputs compressed air into the box body, and high-pressure air in the box body enters the container through the pressurizing port, so that the air pressure in the container is increased, volatilization and tainting of odor of various experimental raw materials can be effectively inhibited, the quality precision and purity of various experimental materials are ensured, and the accuracy of experimental data is ensured.

The invention provides flow stabilizing equipment for providing undisturbed source outflow. The flow stabilizing equipment comprises a water pump flow stabilizing pipe, a first flow stabilizing water tank flow stabilizing pipe and a second flow stabilizing water tank flow stabilizing pipe which are arranged in sequence; the water pump flow stabilizing pipe is used for conveying a water pump of the water supply pool to the first flow stabilizing water tank flow stabilizing pipe; a rectifying assembly is arranged in the first flow stabilizing water tank flow stabilizing pipe and used for rectifying and reducing disturbance in water flow; the first flow stabilizing water tank flow stabilizing pipe and the second flow stabilizing water tank flow stabilizing pipe are connected through a flow stabilizing pipe; and a water outlet used for being connected with a test device is formed in the bottom of the second flow stabilizing water tank flow stabilizing pipe, and an overflow water outlet assembly is further arranged on the side wall of the second flow stabilizing water tank flow stabilizing pipe for ensuring that a water source of the second flow stabilizing water tank flow stabilizing pipe has a constant water head. The flow stabilizing equipment for providing the undisturbed source outflow is reasonable and simple in structure and low in cost, and non-disturbance source outflow can be provided only through the water pump, the water tank, the pipeline, the valve, a damping screen and related connecting pieces.

The invention discloses a coal spontaneous combustion programmed temperature control system and method utilizing microwave heating, and the related coal spontaneous combustion programmed temperature control system comprises a heating mechanism, a coal sample bearing mechanism, an electric control mechanism and a gas collection and analysis mechanism; the heating mechanism is used for heating the coal sample in the coal sample bearing mechanism by utilizing a microwave generator; the electric control mechanism is used for controlling the heating power of the coal sample and the gas flow leading to the coal sample; and the gas collection and analysis mechanism is used for collecting a gas sample generated in the analysis process. The invention further relates to a coal spontaneous combustion program temperature control method utilizing microwave heating, the coal spontaneous combustion program temperature control method comprises the stages of coal sample filling, program heating, temperature control mode and the like; the ratio of the actual microwave heating effect to the industrial energy consumption is comprehensively considered, the frequency value of microwaves is set to be 2.45 GHz in the program heating stage, and the heating power value is set to be 1.2-1.6 kw in the program heating stage. The system and method are suitable for being used in coal spontaneous combustion characteristic research, it can be guaranteed that the coal sample is rapidly and evenly heated, the heating rate is controllable, and different experiment requirements can be met.

The invention relates to a simple and environment-friendly tissue RNA extraction device. The device comprises a bottom plate, a protective cover, a grinding mechanism, a cleaning mechanism and a liquid feeding mechanism, the protective cover is arranged on the bottom plate, the grinding mechanism is arranged on one side of the top of the protective cover, the cleaning mechanism is arranged on thelower part of the grinding mechanism and on the bottom plate, and the liquid feeding mechanism is arranged on the other side of the top of the protective cover. The device has the advantages of scientific and reasonable design, simple and convenient structure, simple operation and flexible movement, effectively saves operation time and space, reduces labor cost, electrically adds liquid, accurately adjusts the adding amount of a reagent, reduces the contact frequency of operators and harmful reagents, delivers scientific research personnel from complicated experimental operation, effectively reduces the harm of toxic experimental reagents to human bodies, and ensures the personal safety of experimental operators. The device reduces artificial errors, simultaneously solves the problem of reagent cross pollution caused by repeated liquid addition, carries out the whole operation process in a low-temperature environment, effectively avoids the RNA degradation, and ensures that high-quality RNA is extracted.

The invention discloses an individual ventilated caging (IVC) system cage environment detection device, which comprises a first flat plate, a second flat plate, supporting legs, a lifting screw rod, atransmission rod, a rotating handle, stabilizing rods, a suction cup, a threaded sleeve, a first detecting module, an electric quantity storing module, a data displaying module, a data processing module and a magnet strip. According to the IVC system cage environment detection device, environment data in an IVC system cage can be accurately detected in the states of not changing the structure ofthe IVC system cage and not opening the IVC system cage. The IVC system cage environment detection device can be suitable for any model of IVC system cage products of any manufacturer. The invention further provides a using method for using the IVC system cage environment detection device to detect the environment data in the IVC system cage. The IVC system cage environment detection device can accurately detect the environment data in the IVC system cage in the states of not changing the structure of the IVC system cage and not opening the IVC system cage.

The invention discloses a static high-pressure experiment data acquisition system and method based on LabVIEW, which is mainly used for measurement of the sound velocity and the conductivity of an experimental material in a high-temperature and high-pressure experiment, and real-time temperature and pressure data acquisition. The whole system integrates the sound velocity measurement and the conductivity measurement; a computer is adopted to integrate a cubic press, an ultrasonic transceiver, a digital oscilloscope, a numerical control current source and the like in the same software for control; experimental conditions input by scientific researchers are automatically recognized; automatic control of the whole experiment is completed; parameters of data of real-time temperature, pressure,conductivity or the like of the static high-pressure experiment are synchronously acquired; and analysis, display and real-time storage are completed. Besides, the functions of time-triggered synchronous acquisition, preset temperature point-triggered acquisition, preset pressure point-triggered acquisition and the like can be achieved. The system has the advantages of being high in synchronization precision, high in speed, simple to adjust, low in control difficulty and diversified in interface function, and can achieve preset acquisition work of various experimental conditions.

The invention discloses a rotary high-temperature fused salt corrosion characteristic simulation system, which belongs to the field of heat storage medium detection devices for concentrated solar thermal power generation. The rotary high-temperature fused salt corrosion characteristic simulation system comprises a fused salt tank, a stirring apparatus, a motor and a motor lifting apparatus for controlling the lifting of the motor, wherein an electric heating apparatus is also arranged in the fused salt tank; one end of the stirring apparatus is fixed on the bottom of the motor, the other end stretches into the fused salt tank, the stirring apparatus can be driven by the motor to lift and rotate, and one end, which stretches into the fused salt tank, of the stirring apparatus is provided with a sample wafer to be tested. By utilizing the rotary high-temperature fused salt corrosion characteristic simulation system, the corrosion condition of the fused salt medium, the flow rate, the temperature and the like on the metal sample wafers made of different materials can be comprehensively and effectively reflected, the system can continuously run (2000h or longer) for a long time at a high temperature state, so that the field can be more actually simulated, and the corrosion result analysis of the sample wafer to be tested is more convincing.

The invention provides an in-situ tensile experiment device for a scanning electron microscope. The in-situ tensile experiment device comprises a base; vertical lifting rods are fixedly installed at the four corners of the top face of the base respectively, the top ends of the four lifting rods are fixedly connected through a square block, and the square block and the base are mutually parallel; guiding grooves are formed in the front end and the back end of the top face of the base respectively, two guiding blocks are arranged in each guiding groove in a matched mode, and every two guiding blocks which are located on the same side of the base are fixedly connected through a long strip block; and the two long strip blocks are mutually parallel, long strip-shaped grooves are formed in the opposite faces of the two long strip blocks respectively, three movable blocks are arranged in each groove in a matched mode, and the three movable blocks located in the same groove are arranged sequentially from front to back. A fourth nut and a ball bearing are fixedly connected through a connecting rod, a second bevel gear is fixedly connected with the inner ring of the ball bearing, then the second bevel gear can be driven to move when the fourth nut moves, and therefore a moving block can do horizontal reciprocating motion.

The embodiment of the invention discloses a 3D (Three-dimensional) microfilament electrode array fixing device and a 3D microfilament electrode array cutting method. The 3D microfilament electrode array fixing device comprises a perfusion chamber, a base, an electrode plug, a microfilament electrode array socket and a microfilament electrode array, wherein the lower end of the perfusion chamber is in sealing connection with the base; an opening is formed in the upper end of the perfusion chamber; the base is fixedly connected with the electrode plug; the electrode plug is positioned in the perfusion chamber, and is in plugging connection with the lower surface of the microfilament electrode array socket; the microfilament electrode array is welded on the upper surface of the microfilament electrode array socket; the microfilament electrode array socket and the microfilament electrode array are positioned in the perfusion chamber. By implementing the embodiment of the invention, accurate lossless cutting of the microfilament electrode array can be realized so as to obtain the microfilament electrode array meeting different experimental requirements.

The invention discloses a non-uniform radiant heat environment test bed which comprises a concrete module base (1) and a frame (2). The horizontal cross section of the concrete module base (1) is square, and a loopback coil pipe (11) is buried in the concrete module base (1) along the horizontal plane; the frame (2) is arranged on the concrete module base (1), and the frame (2) and the concrete module base (1) form an approximately cubic test bed; other five surfaces, except the bottom surface, of the frame (2) are respectively arranged to be of grid structures, a pipe fitting (32) with a round top and a square bottom is fixedly arranged on at least one grid (3), and convex electric heating radiation plates (33) are fixedly arranged on the other grids (3). The invention further provides ausing method of the test bed. The non-uniform radiant heat environment test bed can be used for a thermal environment evaluation test, especially a test in a non-uniform radiant heat environment.

The invention discloses a supplementary lighting device. The device is characterized by comprising a rectangular bracket, the bracket comprises two beams and a plurality of longitudinal beams, and illuminant units are arranged on illuminant unit installation sites of the longitudinal beams; four corners of the bracket are provided with fixing pieces used for fixing the bracket to the inside of anillumination incubator. The device can be conveniently fixed to the inside of the illumination incubator, own power sources of the illumination incubator can be utilized to supply power, according tolight requirements of plants, the number of the illuminant units and layout modes can be arranged, the distance between the bracket and the plants can be adjusted, suitable illumination is ensured, and the use is flexible and convenient; the supplementary lighting device is added in the illumination incubator so that the existing illumination incubator can satisfy different experiment requirements, new equipment purchasing is reduced, and the fund is saved.

The invention relates to an integrated device for an experimental rat water maze experiment. The integrated device comprises an experimental device and a drying device which are connected through a conveying belt. By reasonably combining the experimental device and the drying device of the water maze device, rats can be directly conveyed from the experimental device into the drying device after entering the water maze experiment, the rats do not need to leave the water maze environment on the premise of not influencing the carrying out of the experiment, water on the rats cannot fall onto theground of a laboratory even when the rats move back and forth, the cleanliness of the laboratory environment is kept, the operations of an experimental operator are convenient, and the experimental efficiency is effectively improved; through the design of a unit drying cage and a telescopic plate, the technical problems are solved that the experimental drying operation is difficult and the counting and managing of experimental rats are disordered, the workload of the experimental operators is greatly reduced, the distinguishing of the experimental rats is facilitated, the experimental time isshortened, and the experimental accuracy is improved.

The invention discloses a dynamic composite loading incident bar, which comprises a first bar section, a second bar section and a compression-torsion metamaterial section, wherein the first rod section, the compression-torsion metamaterial section and the second rod section are sequentially arranged in the same axis direction; and one end of the compression-torsion metamaterial section is connected with one end of the first rod section, and the other end is connected with one end of the second rod section. The compression / stretching waves can be converted into compression-torsion / tension-torsion composite waves by utilizing the compression-torsion metamaterial section, and when the first rod section is impacted, the second rod section can output a compression / stretching and torsion composite load through the compression-torsion metamaterial section, so that the composite loading test requirement can be met. According to the structural improvement, the metamaterial is creatively combined and applied to the incident bar, so that the improved incident bar has a composite loading function. Compared with an existing composite loading implementation mode, the compression / stretching waves and torsion waves are generated on the second rod section at the same time, and the problem of synchronous triggering does not exist; and the structure is simple, and the complexity of the device is greatly reduced.

The invention relates to a control moment gyroscope vibration isolation support performance testing device and method in the field of testing technical equipment. The device comprises a vibration table which is used for providing a vibration source and a vibration effect; a vibration isolation bracket which is arranged on the vibration table and is used for providing a vibration isolation effect; a control moment gyroscope simulation piece which is arranged on the vibration isolation bracket; and a suspension mechanism which is arranged above the vibration isolation support, is of a suspended ceiling structure and is used for overcoming the gravity of the control moment gyroscope simulation piece and the vibration isolation support; and acceleration sensors are arranged on the vibration table, the vibration isolation bracket and the control moment gyroscope simulation piece. The device is advantaged in that an acceleration time-domain signal can be observed in real time, the time-domain signal can be processed in real time to obtain the acceleration frequency-domain signal, the vibration isolation performance of the vibration isolation support in the three translation directions can be tested through the test method, and the test method is simple, flexible, easy to operate and high in practicability.

The invention relates to a double-head simple sunflower seeding device with adjustable row spacing. The device comprises a frame, a slotting device, a seeding device, a soil spreading device, a soil loosening device and a soil pressing device. The slotting device is fixed on the frame, and is located at the front section of the frame; the soil loosening device is positioned in front of the slotting device, and the seeding device is fixed on the frame; the soil spreading device is fixed on the frame, and the soil pressing device is positioned behind the soil spreading device; the soil pressingdevice is fixed on the frame, and the slotting device comprises a first connecting block, a first fixing block and a slotting head; the first fixing block is provided with a plurality of fourth limiting holes; the first fixing block is clamped on the first connecting block and fixed on the first connecting block under the action of a bolt through the fourth limiting holes in the first fixing block; and the slotting head is fixed at the lower section of the first fixing block. According to the invention, through the slotting device, the seeding device and the soil spreading device, the row spacing on the frame can be randomly adjusted according to experimental requirements.