32results about How to "Intuitive phenomenon" patented technology

The invention relates to an upper-water-permeable lower-water-resistible type cap rock collapse cause experimental device and belongs to the karst collapse research technical field. With the upper-water-permeable lower-water-resistible type cap rock collapse cause experimental device of the invention adopted, the whole process of the cause of the collapse of upper-water-permeable lower-water-resistible karst triggered by the rise and fall of groundwater level can be directly expressed, and the variation law of the intensity of pressure in a karst cave and the formation and expansion of a soilcave which are caused by the erosion of lower layer soil by groundwater can be visually showed, and related testing and parameter determination can be performed. Experimental data and experimental rules obtained by the device of the invention are very useful for analyzing and studying essential relationships between the groundwater level and karst collapse geological disasters, especially, a new technical means is provided for studying seepage deformation generated in the variation process of the groundwater level of the karst cave and karst collapse caused by the formation and expansion of the soil cave which are caused by the erosion of the lower layer soil; the development process of such karst collapse is reproduced; the formation mechanism of the karst collapse is revealed; and a certain reference value is provided for work such as the establishment of a karst collapse prevention, disaster reduction and early warning system.

The utility model relates to an experimental device for exploring that smoking is harmful to health, which comprises an injector, a latex tube, a test tube with a branch tube, a one-way valve, a conduit, an iron stand, an iron clamp, a test tube, a cigarette, a cigarette holder, a rubber plug and a conical flask, the branch tube opening of the test tube with the branch tube is connected with the injector through the latex tube, the rubber plug of the tube opening is inserted into the one-way valve and the conduit, and the test tube opening is provided with a double-hole rubber plug with the conduit. The test tube with the branch tube and the test tube are respectively fixed on the iron stand and are clamped by the iron clamp, one hole of the double-hole rubber plug on the conical flask is connected with the cigarette holder, the other hole is connected with the conduit, and finally, the interfaces of the conduits are connected by the latex tubes. The injector is pushed and pulled to suck smoke generated by burning cigarettes into the container, and the smoke acts with chicken blood or a series of reagents to present color and state changes, so that smoke components are explored. The device is simple in manufacturing material, cheap and easily available in reagent and visual in experimental phenomenon, can better feel the harm of smoke to health, and enhances the environment-friendly awareness that people do not smoke and are far away from second-hand smoke.

The invention relates to a method for rapidly distinguishing potassium chloride particles and sodium chloride particles. The method is characterized in that a sodium tetraphenyl borate solution is prepared by utilizing an organic solvent, the surface of a to-be-detected particle is wetted by utilizing the sodium tetraphenyl borate solution, and the potassium chloride particles and the sodium chloride particles can be distinguished by observing whether the liquid on the surface of the particle is turbid or not or whether needle-shaped precipitates are generated on the surface of the particle or not, wherein the particle with needle-shaped attachments on the surface is the potassium chloride particle; the particle with a liquid on the surface being turbid and having white precipitates is the potassium chloride particle. The sodium tetraphenyl borate alcohol solution reacts with the potassium chloride to generate stable white precipitates which are attached onto the surface of the potassium chloride, so that the potassium chloride particles and the sodium chloride particles can be rapidly distinguished, and a great amount of work for grinding a sheet and judging the potassium chloride and the sodium chloride according to the difference of the refractive index when the coarse potassium chloride and the coarse sodium chloride are distinguished in the identification of a phase can be avoided.

A space curving model demonstrator utilizes warping of a rubber membrane to vividly analog a curved space caused by gravity, and simulates and demonstrates difference between ball body moving trajectories when a moving ball body passes through a flat space without a gravitational field and a curved space with a gravitational field respectively, so as to show the existence of the gravitational field, that is, the space around the gravitational field is curved. The space curving model demonstrator has the advantages of simple structure, convenient operation, high visibility, visual and obvious phenomenon, low cost, safe demonstration, durable property, and easy popularization.

Said invention adopts UV laser beam whose power density is greater than melting threshold value of fabric surface to detected to irradiate the surface of fabric to be detected, then the treated fabric surface is placed under the microscope to make observation and obtain microphotograph of the detected fabric, then said obtained microphotograph is compared with the microphotograph of the sample toobtain the components of the detected fabric. As compared with existent technique its detection is accurate, and it does not damage the appearance of fabric.

The invention discloses a system for evaluating a liquid foaming performance. The system includes a device for evaluating the liquid foaming performance. The device for evaluating the liquid foaming performance includes a transparent first cylinder body (2) of which a bottom end is sealed. A filter plate (6) is sealedly connected inside the first cylinder body (2). The interior of the first cylinder body (2) is divided into an upper hollow chamber (21) and a lower hollow chamber (22) in a vertically arranging manner. A gas inlet (7) is arranged on the bottom of the first cylinder body (2). The system also includes a gas source by which the lower hollow chamber (22) is filled with a gas. By means of the system, a foaming performance of a slurry sample in a desulfuration operation absorption column can be effectively researched. The system can guide an enterprise for adjusting an operation mode of the desulfuration operation absorption column so that various production safety problems caused by foaming in slurry are avoided.

The invention discloses a solar energy measuring material heat conductivity coefficient experimental device and a measuring method thereof. The solar energy measuring material heat conductivity coefficient experimental device comprises a slideway, a heating disc frame, a heat dissipating disc frame, a poor conductor sample frame, a poor conductor sample, a metal sample, a metal sample frame, a heating disc, a heat dissipating disc, a first temperature sensor, a second temperature sensor, a heat dissipation fan, a single chip computer temperature measurement and controller, a compression bolt,a compression nut and a solar photovoltaic power supply system. The measuring device is used for measuring the heat conductivity coefficient of poor conductors and metal materials by utilizing a steady state method. The device is intuitionistic in phenomenon, accurate in measurement data, small in measurement error and good in repeatability, the components are convenient to dismount and mount, thus tests can be conducted smoothly, and the problem that an existing instrument is inconvenient to dismount and mount so that the teaching progress can be slow is avoided. The device improves the testprecision and test efficiency, and can be widely applied to scientific research, education and production.

The invention discloses a method for measuring the jet trajectory length air displacement of the outer edge of model nappe under the low-air-pressure environment. The method adopts a depression tank,firstly a measuring area is set, then a distance testing beam stretching across the front part of the model nappe is arranged in the measuring area, and thus the lower edge line of the distance testing beam is adjacent to the outer edge line of the model nappe; a camera is adopted to record the flow state of the model nappe located on the inclined front part of the distance testing beam; and a vacuum is formed in the depression tank, the flow state of the model nappe located on the inclined front part of the distance testing beam is online observed, if the phenomenon of splashing of a large number of water drops or the model nappe crossing the beam occurs, the distance between the lower edge line of the distance testing beam and the outer edge line of the model nappe is horizontally adjusted till the lower edge line of the distance testing beam is adjacent to the outer edge line of the model nappe, and the horizontal movement distance of the distance testing beam is the jet trajectorylength air displacement of the outer edge of the model nappe under the air pressure. The jet trajectory length air displacement of the outer edge of the model nappe under the low-air-pressure environment is measured by horizontally adjusting the position of the distance testing beam, the principle is simple and clear, the phenomenon is intuitive, and the cost is low.

The invention relates to the field of teaching equipment, and aims to provide a gravitational acceleration measuring method and a device thereof. According to the gravitational acceleration measuring method and the device, a laser transmitting device replaces a traditional ticker timer, thereby realizing no-contact ticking, reducing effect of a friction resistance of a traditional tape belt, and realizing more accurate experiment result. The gravitational acceleration measuring method has beneficial effects of simple structure and convenient operation. Ticking on a falling object which is coated with fluorescent powder is realized through the laser transmitting device, thereby realizing visual and obvious phenomenon and high stability. The gravitational acceleration measuring method is suitable for self research and self experience of a student, thereby improving persuasiveness in teaching. The falling object can automatically return to normal after a certain time period. High repeatability is realized, and furthermore consumable materials are greatly saved. Through a strange optical phenomenon of making the falling object emit light by means of the laser transmitting device, attention of the student can be focused to the experiment, thereby improving studying enthusiasm of the student and improving teaching effect.

The invention discloses a gas molecule five-direction diffusion rate comparison demonstrator, which is characterized by comprising a bracket (1), wherein the bracket (1) is provided with a transversemortar (2), the transverse mortar (2) is a cylinder, a cavity is drilled in the center of the front end of the transverse mortar (2), a small hole is drilled in each of five directions including vertical upward and downward directions, a one-side horizontal direction, a one-side 45-degree oblique upward direction and a one-side 45-degree oblique downward direction at a position close to the bottomof the cavity, and the small holes are communicated with the cavity; a large hole is drilled in the perpendicular direction at the rear end of the transverse mortar (2), and the bracket (1) is inserted into the large hole for fixation; a catheter (3) with a rubber stopper at the outer end is inserted in each of the five small holes of the transverse mortar (2); and a phial (4) containing concentrated ammonia water or other test supplies is inserted into the cavity of the transverse mortar (2). The gas molecule five-direction diffusion rate comparison demonstrator can enable students to measure rates of gas diffusion in longitudinal, transverse and oblique directions for comparison visually, so as to explore the influence of gravity and the like on directed diffusion rates of gases in theatmosphere.

The invention relates to a graphite sealing element frictional force and sealing pressure testing device. The graphite sealing element frictional force and sealing pressure testing device comprises a hydraulic central tube and a frictional central tube, an in-tube space is formed inside the hydraulic central tube and the frictional central tube, and both ends of the in-tube space are closed and connected with a first pump through pipes; a frictional external tube slidingly sleeves the outer wall of the frictional central tube; an accommodating space for accommodating graphite sealing elements is formed between the frictional external tube and the frictional central tube; communicating passages are formed between the accommodating space and the in-tube space; the frictional external tube is threadedly connected with a fastening nut; an external tube sleeves the hydraulic central tube; the first end and the second end of the external tube are threadedly connected with an upper connector and a lower connector respectively in a sealed mode; the outer wall of the hydraulic central tube is provided with a ring-shaped protrusion, which is attached to the inner wall of the external tube in a sealed mode to divide a ring-shaped space into a first cavity and a second cavity; the first cavity is connected with a second pump through pipes. The graphite sealing element frictional force and sealing pressure testing device can help obtain the corresponding relationship among the parameters of fastening torque, roughness, sealing pressure and frictional force.

The invention discloses a horizontal projectile motion virtual-real fusion experiment platform which comprises a horizontal projectile motion instrument, a high-speed camera, a computer and a projector. The invention further discloses a horizontal projectile motion virtual-real fusion method. The method comprises the following steps: S1, enabling the high-speed camera continuously to shoot imagesof falling of a small ball; S2, identifying the images by the computer, and acquiring the position of the small ball in a high-speed camera image coordinate system at each moment; S3, converting the obtained central point position of the small ball in the high-speed camera image coordinate system into the position in the projector image coordinate system by the computer at each moment, and fittingpoints corresponding to each position in the projector image coordinate system into a curve; and S4, projecting the fitted curve to a horizontal projectile motion instrument by the projector, and carrying out virtual-real fusion presentation. On the basis of real experimental equipment and operation, an experiment is expanded on the basis of real experimental data, and virtual presentation is carried out.

The invention discloses a demonstration device showing a direction of a frictional force. The demonstration device comprises a bracket, a bicycle, and two movable friction devices which are arranged under a front wheel and a rear wheel of the bicycle separately, wherein the bicycle is arranged on the bracket in a slidable manner; each movable friction device comprises a box body, a first laser emitting device and two light shading assemblies, and the first laser emitting device and the two light shading assemblies are arranged inside the box body; each light shading assembly comprises a guide wheel, a pull rope and a light shading curtain, the guide wheel is fixed on the side wall of the box body, one end of the pull rope is connected with the light shading curtain, the other end of the pull rope is fixed on a bicycle tyre, and the variation of states of the bicycle tyre drives the light shading curtain to ascend and descend; and at the same moment, first laser and second laser irradiate on the corresponding light shading curtains separately, or one of the first laser and the second laser emits out from the box body. The demonstration device displays the rolling friction direction clearly through controlling emitting of the laser by means of the light shading assemblies according to the feature that frictional force directions of the front wheel and the rear wheel are different when the bicycle is being ridden and pushed.

The invention provides a coulomb force experimental instrument based on a light lever. The coulomb force experimental instrument comprises a main box body, a sliding seat, an electrostatic pendulum, ashifting frame, a hollow conductor ball and a reading system, the pendulum ball and the hollow conductor ball are arranged, the two balls are connected with the same pole of the high-voltage direct-current power supply, and the pendulum ball can deviate from the vertical direction under the action of coulomb repulsive force; the position of the sliding seat is controlled to be unchanged, the output voltage of the high-voltage direct-current power supply is adjusted, the change of the deflection angle of the pendulum ball is observed, and the qualitative relation between coulomb force and charge quantity can be explored; then the displacement frame is adjusted, the position of the pendulum ball is changed, it is ensured that the ball center of the pendulum ball and the ball center of the hollow conductor ball are located on the straight line calibrated by the coulomb force experimental instrument, the distance r between the two ball centers and the distance h between the suspension point of the sliding seat and the straight line calibrated by the coulomb force experimental instrument are measured in combination with the reading system, and the coulomb force F can be indirectly measured; similarly, the output voltage of the high-voltage direct-current power supply is changed, multiple groups of F and r are measured, and the quantitative relation between the coulomb force F and the distance r between the two sphere centers can be explored.

The invention discloses a cyanuric acid derivative, a disc-like liquid crystal material and a melamine detection method. The liquid crystal material is a cyanuric acid derivative which has the basic characteristics of cyanuric acid and can be connected with melamine serving as a core by hydrogen bonds to form a discotic liquid crystal. The melamine and the specially designed organic molecules are connected together by hydrogen bonds and self-assembled to form a disc-like liquid crystal molecule which is a compound A/M or a compound B/M as shown in the specification, wherein n is 5-40. Such microstructures of the disc-like liquid crystal molecule as color, pattern and texture are changed when observed under a polarizing microscope, thus the melamine can be detected.

An instrument for demonstrating transverse waves and standing waves in different media is characterized in that different liquids are added into a medium box, one end of a rope is fixed at one end of a crank, a motor rotates to drive a main shaft to rotate, the main shaft drives a crankshaft to rotate, the crank vibrates up and down along with the crankshaft, the length of the rope is adjusted, and the other end of the rope is fixed. When the length of the rope reaches a proper length, a standing wave phenomenon can be generated on the rope, the phenomenon of transverse waves can be seen from the water surface through the upper part and the lower part of the crank in the other medium box, or the difference of waves under different media can be seen through placing different media in each medium box.

A dihedral angle teaching device is composed of a base plate (1) and two flaky plates (2). The base plate is provided with a circular rolling groove, and the periphery of the circular rolling groove is provided with scale numbers of an arc; the circle center of the circular rolling groove is provided with a fixed shaft which connects one edge of one flaky plate with one edge of the other flaky plate together to form a dihedral angle; the corner of each flaky plate is provided with a rolling ball (3), and the rolling balls are steadily embedded into a groove ditch of the circular rolling groove, only can slide in the groove ditch and cannot leave the groove ditch. The dihedral angle teaching device has the advantages that content such as formation of the dihedral angle, the properties of the dihedral angle and the action of the dihedral angle is taught through the device, the phenomena are straightforward, and students can easily accept and master the content; a teacher can achieve the teaching effect of getting twice the result with half the effort.