CN205247740U - Refractometer teaching mode - Google Patents

Abstract

A refractometer teaching model, comprising a display board, the display board is provided with a refractometer assembly A, a refractometer assembly B and a refractometer assembly C; the refractometer assembly A is a transparent liquid storage bottle A, and the transparent liquid storage bottle A is An arc slideway A and an arc slideway B are respectively arranged on both sides; the refractometer component B includes a linear slideway C and a transparent liquid storage bottle B, and the upper end surface of the transparent liquid storage bottle B is parallel to the linear slideway C, The linear slideway C slides with a light source C that can rotate in any direction, and the transparent liquid storage bottle B is provided with rectangular parallelepiped glass blocks and semi-cylindrical glass blocks in the horizontal direction; the refractometer assembly C includes light sources D, Dispersion prism group and spot receiving screen. The utility model can intuitively simulate each process and basic principle of the refractometer, enabling students to quickly and intuitively understand and master the knowledge of the refractometer, and the phenomenon is real and clear.

Description

Refractometer Teaching Model

technical field

The utility model relates to the technical field of teaching appliances, in particular to a teaching model of a refractometer.

Background technique

With the popularity of automated instruments, the operation of instruments in experimental teaching tends to be more and more one-button operation, and the basic principles of instruments are gradually covered up, such as the Abbe refractometer, which makes students can only simulate this happening process in their imagination , makes some students feel difficult, so it is necessary to have a device that can clearly demonstrate the principle of the instrument.

Utility model content

In order to solve the above technical problems, the utility model proposes a teaching model of a refractometer.

The technical scheme of the utility model is:

A teaching model of a refractometer, comprising a display board, the display board is provided with a refractometer assembly A, a refractometer assembly B, and a refractometer assembly C;

The refractometer component A includes a transparent liquid storage bottle A with an arc on one side, the upper end surface of the transparent liquid storage bottle A is provided with a bottle mouth A, and the two sides of the transparent liquid storage bottle A are respectively provided with an arc slideway A and a circle. The arc slide B, the center of the arc slide A and the arc slide B coincide, the arc slide A slides with the light source A, the arc slide B slides with the light source B, and the light emitted by the light source B Always perpendicular to the curved surface of the transparent storage bottle;

The refractometer assembly B includes a linear slideway C and a transparent liquid storage bottle B, the upper end surface of the transparent liquid storage bottle B is provided with a bottle mouth B, the upper end surface of the transparent liquid storage bottle B is parallel to the linear slideway C, and the linear slideway C slide is equipped with a light source C that can rotate in any direction, and the transparent liquid storage bottle B is equipped with rectangular parallelepiped glass blocks and semi-cylindrical glass blocks in the horizontal direction; each end face of the rectangular parallelepiped glass blocks is smooth, and the semi-cylindrical glass blocks are parallel to the display board The cross-section is a smooth surface, and the upper end surface and the curved surface are both frosted surfaces; the upper end surface of the cuboid glass block and the upper end surface of the semi-cylindrical glass block are parallel to the linear slideway C;

The refractometer assembly C includes a light source D, a dispersion prism group and a light spot receiving screen sequentially arranged in the horizontal direction.

Preferably, the length dimension of the upper end surface of the transparent liquid storage bottle A in the horizontal direction is greater than the length dimension of the left end surface in the vertical direction, and the front view of the arc surface corresponds to an arc of an arc edge greater than 90 degrees.

Preferably, the light source A, the light source B and the light source C are all laser generators, the light source A and the light source B emit light of different colors, and the light source D is an ordinary strong light source.

Preferably, the light spot receiving screen is a white frosted board, and the light spot receiving screen is vertically fixed on the display board.

Preferably, the display board is divided into a display board A and a display board B, the refractometer assembly A is arranged on the display board A, and the refractometer assembly B and the refractometer assembly C are arranged on the display board B.

Preferably, the lower ends of the display boards A and B are provided with display board brackets, and the display board brackets are fixed on the display boards by screws.

Preferably, polyvinyl alcohol solution or silver nitrate solution is filled in transparent liquid storage bottle A; polyvinyl alcohol solution or silver nitrate solution is filled in transparent liquid storage bottle B.

The technical effect of the utility model is:

The utility model can intuitively simulate each process and basic principle of the refractometer, enabling students to quickly and intuitively understand and master the knowledge of the refractometer, the phenomenon is real and clear, the difficulty of teaching is reduced, and the learning efficiency is improved; each component of the utility model Easy to disassemble and assemble, good portability, convenient and practical.

Description of drawings

Fig. 1 is the structural representation of display plate A and refractometer assembly A in the utility model;

Fig. 2 is the structural representation of display board B and refractometer assembly B, C in the utility model;

Fig. 3 is the three-dimensional state schematic diagram of transparent liquid storage bottle A in the utility model;

In the figure: 1. Display board A, 2. Arc slideway A, 3. Light source A, 4. Transparent liquid storage bottle A, 5. Arc slideway B, 6. Light source B, 7. Display board bracket, 8 .Screw, 9. Display board B, 10. Linear slideway C, 11. Light source C, 12. Cuboid glass block, 13. Semi-cylindrical glass block, 14. Transparent liquid storage bottle B, 15. Light source C, 16. Dispersion Prism group, 17. spot receiving screen, 41. bottle mouth A, 141. bottle mouth second.

detailed description

The specific embodiment of the present utility model is shown in Fig. 1-3, a radiometer teaching model, including a display board A (1) and a display board B (9), the lower ends of the display boards A and B are equipped with a display board bracket 7, The display board bracket 7 is fixed on the display boards A and B through screws 8, and the display board bracket 7 can make the display boards A and B stand upright on the desk conveniently and firmly, which is convenient for students to observe; the display board A (1) is provided with a refraction Refractometer component A, display board B (9) is equipped with refractometer component B and refractometer component C;

The refractometer assembly A includes a curved transparent liquid storage bottle A 4 on one side. The upper end surface of the transparent liquid storage bottle A 4 is provided with a bottle mouth A 41. For the length dimension in the vertical direction, the front view of the arc surface corresponds to an arc angle greater than 90 degrees (transparent liquid storage bottle A 4 is a part of the cylinder).

The two sides of the transparent liquid storage bottle A 4 are respectively provided with an arc slideway A (2) and an arc slideway B (5), and the center of the circle where the arc slideway A (2) and the arc slideway B (5) are located Coincidentally, the arc slideway A (2) is equipped with light source A (3), and the arc slideway B (5) is equipped with light source B (6). The light emitted by light source B (6) is always perpendicular to the transparent The curved surface of liquid storage bottle A 4; light source A (3) and light source B (6) are both laser generators, light source A (3) is a red light source, light source B (6) is a green light source, light source A and The color of the light emitted by light source B is different, which is convenient for experimental observation.

The refractometer assembly B includes a linear slideway C (10) and a transparent liquid storage bottle B14, the upper end of the transparent liquid storage bottle B14 is provided with a bottle mouth B141, and the upper end surface of the transparent liquid storage bottle B14 is connected with the linear slideway C (10) Parallel, the linear slideway C (10) slides with a light source C (11) that can rotate in any direction, the light source C (11) is a laser generator, and a cuboid is installed horizontally in the transparent liquid storage bottle B 14 Glass block 12 and semi-cylindrical glass block 13; each end face of rectangular parallelepiped glass block 12 is a smooth surface, and the section parallel to display board B (9) of semi-cylindrical glass block 13 is a smooth surface, and the upper end face of semi-cylindrical glass block 13 is curved The surfaces are frosted surfaces; the upper end faces of the cuboid glass block 12 and the upper end face of the semi-cylindrical glass block 13 are parallel to the linear slideway C (11);

The refractometer assembly C includes a light source D (15), a dispersion prism group 16 and a light spot receiving screen 17 arranged in sequence in the horizontal direction; the dispersion prism group 16 adopts the dispersion prism group in the Abbe refractometer, and the light source D (15 ) is an ordinary strong light source, the spot receiving screen 17 is a white frosted board, and the spot receiving screen 17 is vertically fixed on the display board B (9).

Laser can produce typical laser scattering phenomenon in specific solvents such as polyvinyl alcohol solution and silver nitrate solution, and can clearly display the traces of laser light. This utility model can demonstrate laser light in this colorless and transparent solution The refraction phenomenon that occurs when passing through the interface is real and clear, which is more intuitive and clear than drawing lines on the blackboard.

When using, first fill the transparent liquid storage bottle A 4 and the transparent liquid storage bottle B 14 with laser sensitive reagents such as polyvinyl alcohol or silver nitrate, turn on the light source A (3) and light source B (6), and adjust the two in the slide position on the rail so that the two light rays are on the same straight line, and at this time, the refraction phenomenon of light from light source A (3) in the transparent storage bottle A4 can be clearly observed; slide light source A (3) downward, When the incident angle of light source A (3) is close to 90 degrees, although the refraction angle is also increasing, it will not become larger when it becomes larger to a certain angle less than 90 degrees, and a transparent liquid storage bottle A 4 appears The fan-shaped dark area that cannot be reached by refracted light. The angle of this fan-shaped dark area is only related to the refractive index of the solution in the transparent storage bottle A4. Mark the relevant scale on the light and dark boundary to read the refractive index of this solution , which is the basic principle that the Abbe refractometer can read the refractive index of the sample.

When the light from light source C (11) passes through the rectangular parallelepiped glass block 12, the light is refracted twice. When the upper end face of the semi-cylindrical glass block 13 was incident, the outgoing light no longer became a line of light, and the arc surfaces of the semi-cylindrical glass block 13 were all lit up. Although there was a difference in light and shade, there was no complete dark zone. This explains why the sample stage of the Abbe refractometer is composed of upper and lower prisms, the surface of the upper prism in contact with the sample is a frosted surface, and the surface of the lower prism is a smooth plane. If both the upper and lower surfaces of the sample stage are smooth, the exiting light will be as demonstrated through the cuboid glass block, without the characteristic fan-shaped dark area observed in the transparent storage bottle A4. The frosted surface turns the upper surface of the sample into a new 180-degree omni-directional light source, and the smooth lower surface ensures that the characteristic light with only one refraction is obtained, so that the characteristic dark area can be observed.

The achromatic prism group is directly taken from the Abbe refractometer or enlarged in equal proportions in all directions. It is mainly composed of two symmetrical trapezoidal quadrangular prisms. The two trapezoidal quadrangular prisms are respectively fixed on two gears. The two gears are connected together, and the two trapezoidal prisms will rotate along the same axis. During the rotation process, it is equivalent to obtaining triangular prisms with different angles. when the prism is center-symmetric). In the Abbe refractometer, the light will inevitably have dispersion after multiple refractions, which will make the light and dark boundaries of the characteristic dark area blurred, making it difficult to read. The achromatic prism group can adjust the angle of the prism to make the dispersed light become Parallel light, thus making the boundaries clear. Turn on the light source D (15) and turn the adjustment knob of the dedispersing prism group 16 to observe the light spots with different degrees of dispersion on the light spot receiving screen 17, allowing students to clearly observe the relationship between the clarity of the light spots and the dispersion.

Claims (7)

1. a refractometer teaching mode, comprises Graphic Panel, it is characterized in that, described Graphic Panel is provided with refractometer assembly first, refractometer assembly second and refractometer assembly third;

Described refractometer assembly first comprises the transparent liquid storage bottle first of one side for arc, the upper surface of transparent liquid storage bottle first is provided with bottleneck first, the both sides of transparent liquid storage bottle first are respectively equipped with circular arc slideway A and circular arc slideway B, the center of circle at circular arc slideway A and circular arc slideway B place overlaps, what circular arc slideway A slided is provided with light source A, what circular arc slideway B slided is provided with light source B, and the light that light source B sends is all the time perpendicular to the arcwall face of transparent liquid storage bottle first;

Described refractometer assembly second comprises linear ramp C and transparent liquid storage bottle second, the upper surface of transparent liquid storage bottle second is provided with bottleneck second, the upper surface of transparent liquid storage bottle second is parallel with linear ramp C, what linear ramp C slided is provided with the light source C that can rotate along any direction, and in transparent liquid storage bottle second, horizontal direction is provided with cuboid glass block and semicylinder glass block; Each end face of cuboid glass block is shiny surface; The semicylinder glass block cross section parallel with Graphic Panel is shiny surface, and upper surface and arcwall face are frosting; The upper surface of the upper surface of cuboid glass block and semicylinder glass block is all parallel with linear ramp C;

Described refractometer assembly third comprises light source D, De-dispersion prism group and the hot spot receiving screen that horizontal direction sets gradually.

2. refractometer teaching mode according to claim 1, is characterized in that, the length dimension of described transparent liquid storage bottle first upper surface horizontal direction is greater than the length dimension of left side vertical direction, and the radian of the corresponding arc-shaped side of front view of arcwall face is greater than 90 degree.

3. refractometer teaching mode according to claim 2, is characterized in that, described light source A, light source B and light source C are laser generator, and light source A and light source B send the light of different colours, and light source D is common high light light source.

4. refractometer teaching mode according to claim 1, is characterized in that, described hot spot receiving screen is white frosted plate, and hot spot receiving screen is vertically fixed on Graphic Panel.

5. according to the refractometer teaching mode described in claim 3 or 4 any one, it is characterized in that, described Graphic Panel is divided into Graphic Panel A and Graphic Panel B, and it is upper that refractometer assembly first is located at Graphic Panel A, and refractometer assembly second and refractometer assembly third are located on Graphic Panel B.

6. according to the refractometer teaching mode described in claim 3 or 4 any one, it is characterized in that, the lower end of Graphic Panel A, B is equipped with Graphic Panel support, and Graphic Panel support is fixed by screws on Graphic Panel.

7. according to the refractometer teaching mode described in claim 3 or 4 any one, it is characterized in that, in transparent liquid storage bottle first, fill poly-vinyl alcohol solution or liquor argenti nitratis ophthalmicus; In transparent liquid storage bottle second, fill poly-vinyl alcohol solution or liquor argenti nitratis ophthalmicus.