46results about How to "Convenient for experimental observation" patented technology

The invention discloses an experiment device and an experiment method for high-temperature high-flow-velocity gas flow heat transfer. The experiment device comprises a gas open circuit based on electromagnetic induction heating and pressure accumulation driving, and a water cooling closed circulation circuit. The gas open circuit of the experiment device mainly provides a gas source through a high-pressure gas storage tank, a pressure reduction valve, a regulation valve, a flowmeter and a check valve are arranged between the high-pressure gas storage tank and a heating section to form a circuit pressure and flow measurement module; the heating section is arranged in a pressure container, and an electromagnetic induction heater is adopted to provide heating power to form an experiment section system; a thermocouple and a pressure sensor are arranged on the heating section to form an experiment section temperature and pressure measurement module; and the water cooling closed circulationcircuit guarantees that a high-temperature tail gas working medium is released in the atmosphere under a low-temperature state after the high-temperature tail gas working medium is cooled. By use of the experiment device, high-temperature high-flow-velocity gas flow heat transfer characteristics under different working conditions can be researched, and reliable experiment data is provided for relevant gas cooling reactors, including high-temperature gas cooled reactors, nuclear heat propulsion reactors and the like.

The invention discloses a low-turbulence compact circulating water tunnel experimental device, comprising a water tank (1), a centrifugal pump (7), and a porous plate (2) and a honeycomb screen (3) which are disposed in the water tank (1). The water tank (1) has a water inlet at the upper part and a water outlet at the lower part at the same side. The porous plate (2) is installed between the water inlet and the water outlet. The honeycomb screen (3) is installed at the water outlet, and has an outlet successively connected a contraction section (4), an experimental section (5) and an expansion section (6). The outlet of the expansion section (6) is connected to the inlet of the centrifugal pump (7). The outlet of the centrifugal pump (7) is successively connected with a backflow section(8), a round-to-square section (9) and a diverging section (10). The outlet of the diverging section (10) is connected to the water inlet of the water tank (1). The hydrodynamic design used by the invention greatly reduces the turbulence of a flow field in the experimental section. The whole experimental device has a compact structure, a small occupied space and low manufacturing cost, which greatly improves the applicability of the water tunnel experimental device.

The invention discloses a coal ash melting property determinator, with high reliability and high efficiency, which belongs to a analysis and test device for coal quality. The device includes a motor shell, a camera arranged inside the motor shell, an observation box, an alundum tube, a gray cone pallet arranged on the porcelain boat of the alundum tube, the observation box includes a square or rectangle box with openings on three side, an anti-half semi-permeable spectroscope which can divide light into two directions vertically arranged inside the box along a certain angle; the gray cone pallet is a stepped gray cone pallet, the a gray cone location tunnel in the front row bottom of the stepped gray cone pallet and the gray cone location tunnel in the back row of step are arranged to stagger. The invention has the advantages of that: not only a trouble of simultaneous observation is resolved, but also each sample is opportunely monitored in an experiment process, therefore, the experiment has no dead time, and determination accuracy is quite improved.

The invention discloses a least square method path prediction algorithm based on a commensurability idea. Based on a real user trajectory, the algorithm collects a trajectory data set, extracts latitude and longitude data, divides the trajectory according to a time threshold, plans the area where all points from a starting point of the trajectory to a point which not exceeds a distance threshold are located as a moving point, connects each center point between adjacent moving points in the trajectory to form a new trajectory map, obtains angle values corresponding to all adjacent points, obtains a turning angle set according to a angle threshold, verifies the turning angle set through the commensurability, obtains error values of the current trajectory by least square method fitting, predicts a turning angle of a next trajectory of a user according to the error values, and finally plans a path by combining time and speed. Counting and finding out a user movement angle change law can further improve the accuracy of prediction based on the user.

The invention discloses a low-turbulence compact circulating water tunnel experimental device, comprising a water tank (1), a centrifugal pump (7), and a porous plate (2) and a honeycomb screen (3) which are disposed in the water tank (1). The water tank (1) has a water inlet at the upper part and a water outlet at the lower part at the same side. The porous plate (2) is installed between the water inlet and the water outlet. The honeycomb screen (3) is installed at the water outlet, and has an outlet successively connected a contraction section (4), an experimental section (5) and an expansion section (6). The outlet of the expansion section (6) is connected to the inlet of the centrifugal pump (7). The outlet of the centrifugal pump (7) is successively connected with a backflow section(8), a round-to-square section (9) and a diverging section (10). The outlet of the diverging section (10) is connected to the water inlet of the water tank (1). The hydrodynamic design used by the invention greatly reduces the turbulence of a flow field in the experimental section. The whole experimental device has a compact structure, a small occupied space and low manufacturing cost, which greatly improves the applicability of the water tunnel experimental device.

A micro-channel device for automatic conveying and posture adjusting of young zebra fish belongs to the field of microinjection. The device is provided to solve a problem that young fish injection atpresent is long in time and low in success rate. An upper-layer module includes an upper plate and a fish conveying unit. A cylindrical boss is on a reversing gear and is provided with a reversing micro-channel. A middle-layer plate is provided with a micro-channel penetrating the center round hole. The right end of the micro-channel is right below a square hopper outlet passage of the fish conveying unit. When the reversing micro-channel is at a lateral position, the reversing micro-channel and the micro-channel are communicated with each other, and the front part of a valve block is providedwith a square stepped through hole in which a rack is disposed. The upper-layer module and a middle-layer module are mounted in a rectangular groove. A first motor is mounted in a first motor mounting hole. A first motor output shaft is provided with a first gear meshed with the rack. The second gear is meshed with the reversing gear. The device is used for microinjection of young zebra fish.

The invention discloses a least square method path prediction algorithm based on a commensurability idea. Based on a real user trajectory, the algorithm collects a trajectory data set, extracts latitude and longitude data, divides the trajectory according to a time threshold, plans the area where all points from a starting point of the trajectory to a point which not exceeds a distance threshold are located as a moving point, connects each center point between adjacent moving points in the trajectory to form a new trajectory map, obtains angle values corresponding to all adjacent points, obtains a turning angle set according to a angle threshold, verifies the turning angle set through the commensurability, obtains error values of the current trajectory by least square method fitting, predicts a turning angle of a next trajectory of a user according to the error values, and finally plans a path by combining time and speed. Counting and finding out a user movement angle change law can further improve the accuracy of prediction based on the user.

The invention discloses a method for quickly qualitatively and quantitatively detecting harmful bacteria in beer breweries by applying fluorescence in situ hybridization and fluorescent microcolony combined technology. The method comprises steps of: preparing sample solution and a culture medium; performing fluorescent microcolony and fluorescence in situ hybridization experimental operation; and observing by using a fluorescence microscope, counting, and qualitatively and quantitatively analyzing the harmful bacteria in the production process of the beer breweries according to fluorescent probes and excited fluorescence with different colors of a carboxyfluorescein diacetate (CFDA) dye. The invention also discloses two specific probes, which are respectively a probe for detecting Lactobacillus brevis, namely 5'-TAGCCGGTGTAACCCTGACTCTG-3' of which one end is marked by Cy3, and a probe for detecting micrococcus tetragenus, namely 5'-GAGATTAGGAAGAACACCAGTGGCGAA-3' of which one end is marked by Cy3. By combining two methods, phenomena that the fluorescence in situ hybridization is difficult to quantitate bacteria and experimental results are easy to show false negative and false positive are avoided, and the problem that the fluorescent microcolony technology cannot qualitatively analyze the bacteria is also solved. Therefore, the requirement on quick detection and qualitative and quantitative requirements for the production of the beer breweries are met.

The invention discloses a plant nematode catch device, comprising a first catch spoon, a second catch spoon and a handle. One end of the handle is provided with a first connecting part and a second connecting part which can be close to or away from each other; the first catch spoon is connected with the first connecting part, the second catch spoon is connected with the second connecting part; thefirst catch spoon and the second catch spoon can be closed to form a closed space or away from each other to form a catch opening. Compared with the prior art, the plant nematode catch device can catch plant nematodes into the netted spoons quickly, cannot only restrict activities of nematodes to bring convenience to experimental observation but avoid hurting the plant nematodes when the plant nematodes are clamped all the time.

The invention discloses a force spectrometer for measuring intermolecular forces. The force spectrometer comprises a force measurement unit, an acquisition control circuit and a data analysis device. The force measurement unit comprises an elastic cantilever, a location stage, a cantilever deformation amplification device, an electric motor, an LED (light emitting diode) lamp and a CCD (charge coupled device) imaging device, wherein the elastic cantilever is provided with one fixed end and one moving end; a needle tip is arranged on the lower surface of the moving end of the elastic cantilever; the fixed end of the elastic cantilever is connected with the electric motor; the location stage is a piezoelectric ceramic locator; and the cantilever deformation amplification device comprises a laser generator, a first mirror, a second mirror and a laser detector. The acquisition control circuit is connected with the location stage, the laser generator, the laser detector and the data analysis device and comprises a proportional integral differential control circuit. The force spectrometer provided by the invention eliminates thermal disturbance to the cantilever, can greatly lower the operation difficulty by changing manual needle laying operation to automatic operation, and can automatically make feedback compensation after the cantilever generates thermal drift.

The invention discloses a photosensitive experiment device taking a light-emitting diode (LED) ultraviolet lamp as a light source. The device comprises a box body provided with a door; the box body is internally provided with an ultraviolet LED lamp panel, a working table and a lifting table which are sequentially arranged from top to bottom, wherein an ultraviolet light intensity detector is embedded in the working table; and the working table is connected with the lifting table. The device is simple and reasonable in structure, convenient and practical, light and flexible and wide in practicality; the photosensitive experiment device is provided with a device specially used for carrying out a photosensitive reaction; the photosensitive experiment device is small in volume, thus being simply sterilized and being capable of carrying out pharmacological experiment operation; and after the device is used, the problems of fixation of the ultraviolet lamp, illumination intensity and homogeneous dispersion, reaction temperature and the like in an experiment of illuminating a photosensitive medicine can be solved; the device is simple, reasonable in design and high in practicality. The device can be applied to similar illumination experiments, and is also suitable for an ultraviolet mutagenesis experiment of a certain specific microorganism.

The invention relates to a feeding device for frankliniella occidentalis, the feeding device is a hexahedron cage body (1), side surface meshes (6) and a bottom surface mesh (8) are arrange on the twoside surfaces and the bottom surface of the cage body (1) respectively, and transparent plastic surfaces arranged on the rest three surfaces, namely, the front side surface, the rear side surface andthe upper surface; a cage bottom draw plate (2) is arranged at the bottom of the cage body (1), a plurality of draw door frames (7) are arranged on the front side surface; and the like; a frankliniella occidentalis insect rearing cage which is easy and convenient to operate, simple in structure, easy in feeding, high in breeding efficiency and high in survival rate is provided, the labor cost andthe labor amount in the insect feeding process can be effectively reduced, the excellent ventilation effect in the insect rearing cage is ensured in the feeding process, the feeding efficiency of thethrips is improved, the thrips can be prevented from escaping and dying, and the thrips feed mildewing and thrips loss are reduced.

The invention discloses a general modular teaching practice device for chemical production lines. The device comprises a public engineering module, a reaction module, a crystallization module, a sieveplate rectification module, an emulsification module, a slurry blending module, an evaporative condensation module, a pretreatment module, an extraction module and a drying module and also comprisesa water distribution module, an A2O module, an aftertreatment module and an electric control system. All the modules are freely matched, combined and connected according to teaching practice requirements, the electric control system comprises electric control cabinets arranged in all the modules, and the electric control cabinet in each module is provided with a controller and a touch screen. Thedevice can effectively help students master related knowledge of various chemical treatment processes and basic principles of the treatment processes, enhance the ability of students for controlling various chemical production treatment process indexes and improve capacity for chemical production line design, building, debugging and control operation.