CN110718127A - Variable-included-angle mirror radiation and contraction dynamic imaging experimental instrument - Google Patents

Abstract

The utility model provides a become contained angle face mirror radiation and shrink dynamic imaging experiment appearance, mainly by horizontal flat board, central groove, light, vortex ring automatic forming ware, vortex ring, level crossing, elastic webbing, hinge, semicircle appearance, observation hole constitute characterized by: two strip-shaped plane mirrors with equal sizes are respectively fixed on two movable hinge leaves, an elastic belt can control the size of an included angle between the two plane mirrors and the overall position of the two plane mirrors in space, and a vertical intersecting line extension line of a graphometer is fixed on a horizontal flat plate; the vortex ring automatic former is fixed on a horizontal flat plate, the motion direction of a vortex ring in the vortex ring automatic former is on an extension plane of an equal division plane of an included angle between two strip-shaped plane mirrors, and the illuminating lamp is fixed on the horizontal flat plate. The technology for researching the imaging radiation and contraction motion law by the jellyfish-shaped vortex ring motion which is not changed alternately by electric power is achieved, the conception is ingenious, the manufacturing is extremely simple, the effect is obvious, and the technology can be popularized to schools in China and science and technology museums.

Description

Variable-included-angle mirror radiation and contraction dynamic imaging experimental instrument

Technical Field

The patent relates to a plane mirror imaging dynamic experimental instrument for demonstrating a variable included angle, and belongs to the field of physical experimental instruments.

Background

In geometric optics, imaging is one of important contents in teaching, the imaging is widely applied in the fields of physical experiments, scientific education and toys, such as infinite parallel peeping demonstration of two plane mirrors (a semi-permeable membrane mirror), kaleidoscope demonstration in triangular prism distribution and the like, in order to increase interest in understanding of imaging of the plane mirrors by students, kaleidoscope designed by people is very popular, images of kaleidoscope in the prior art are static, or a lens barrel is rotated, or an imaged object is artificially rotated or shaken by a motor, and the like, the included angle between the plane mirrors is fixed, images of different included angles of the plane mirrors cannot be seen in one device for comparison, the physical contents dynamically expressed by the kaleidoscope are not deeply carved, novelty and creativity are lacked, and how to realize imaging of the plane mirror with variable angles (variable included angles) is realized, and the dynamic objects do not depend on electric power, electricity, the patent aims to solve the problem of how to realize a comprehensive new experiment which is ingenious in conception, simple and easy to implement, low in cost and convenient for students to explore and research by manually driving and dynamically radiating and contracting an alternatively changed imaging image for a long time. The method is completed under the support of national natural fund projects (project numbers are 11805107 and 11405092), basic business cost scientific research projects (project number is 135209251) of high schools belonging to provinces of Heilongjiang province and high schools and application projects (project number is SJGY 20170385).

Disclosure of Invention

The patent is a physical demonstration experiment instrument for deeply demonstrating some characteristics of two plane mirrors, and emphasizes on solving the problem that the elastic belt controls different included angles and spatial positions between the two plane mirrors, and the influence of the movement of an eddy ring with the movement direction changing alternately generated by non-electric power for a long time on imaging.

This patent technical scheme: the utility model provides a become contained angle face mirror radiation and shrink dynamic imaging experiment appearance, mainly by horizontal flat board, central groove, light, vortex ring automatic forming ware, vortex ring, level crossing, elastic webbing, hinge, semicircle appearance, observation hole constitute characterized by: two strip-shaped plane mirrors with the same size are respectively fixed on two movable hinges (the reflecting surfaces are opposite, the included angle between the two strip-shaped plane mirrors can be changed within the range of 0-180 degrees), a central groove is arranged at the central shaft of the horizontal plane, and hinge shafts on the plane mirrors are positioned in the central groove (the position for limiting the vertex angles (top edges) of the two plane mirrors); an elastic belt is wound around the edges of the two long-strip plane mirrors, and the two ends of the elastic belt are fixed on the horizontal flat plate after being stretched (tensioned); the elastic band can control the included angle size between the two plane mirrors and the overall position of the two plane mirrors in the space, and the specific method comprises the following steps: the elastic belt is pulled up and is not contacted with the two plane mirrors, the included angle between the two plane mirrors and the diagonal line of the two plane mirrors are adjusted to be at the vertical position, then the elastic belt is released and is contacted with the two plane mirrors, and thus the included angle between the two plane mirrors and the position in space are determined; the edges of the two long-strip-shaped plane mirrors are subjected to chamfering treatment to prevent the elastic belt from being cut off, the elastic belt is an elastic belt with a larger elastic coefficient, grooves with equal intervals are formed in the surface of the elastic belt, the width of each groove is equal to the thickness of the plane mirror, and the grooves of the elastic belt face the plane mirror and are in contact with the edges of the plane mirror (the friction between the grooves and the elastic belt is increased); the bottom edge of a graphometer (protractor) with an observation hole is superposed with the extension line of the intersection line of the reflecting surfaces of the two strip-shaped plane mirrors, and the extension line of the vertical intersection line of the graphometer is fixed on the horizontal flat plate; the vortex ring automatic generator is fixed on the horizontal flat plate, and the motion direction of a vortex ring in the vortex ring automatic generator is on an extension plane of an equal division plane of an included angle between two elongated plane mirrors (ensuring that the image of the vortex ring can be observed through an observation hole of a semi-circular instrument); the illuminating lamp is fixed on the horizontal flat plate.

As shown in the schematic diagram of the imaging rule of FIG. 1, according to the mirror imaging rule, the study object moves from the position of time T S1 to the position of time t + Δ t S2, the mirror BO is imaged and moves to the position of S2(BO) corresponding to the position of S1(BO) for the first imaging, and then moves to the position of S2(BO-OA) corresponding to the position of S1(BO-OA) for the second imaging, and imaging is performed sequentially, so that a large number of visual images of objects moving from the center to the outside can be seen at the viewing port, and similarly, the object moves to S1 from S2, and a large number of visual images of objects moving from the outside to the center can be seen at the viewing port through multiple imaging.

Referring to fig. 2, the vortex ring automatic former: a perforated rubber ring a is fixed on the inner side of the outer cylinder, a glass tube is sleeved with the rubber ring b, the inner diameter of the rubber ring a is matched with the outer diameter of the rubber ring b, the inner cylinder and the outer cylinder are transparent, a perforated rubber plug c is arranged at the opening of the inner cylinder, the outer diameter of the communicating tube (rubber tube) is matched with the aperture of the perforated rubber plug c and the aperture of the perforated rubber ring a, and the communicating tube penetrates through the hole of the perforated rubber plug c and the hole of the perforated rubber ring a to be sealed and fixed, so that the inner cylinder and the outer cylinder are fixedly communicated (isobaric, and liquid of the inner cylinder and the outer cylinder is prevented; experimental parameters: at normal temperature, 20-25% concentration saline water is filled in the inner cylinder, clear water is filled in the outer cylinder, the thickness of a thin iron sheet fixed at the bottom of the inner cylinder is 0.055mm, the aperture on the iron sheet is 0.396mm, vortex rings like jellyfish can appear, one vortex ring follows the other vortex ring to be larger, the phenomenon is periodically and alternately appeared up and down, namely, the initial saline water in the inner cylinder passes through a hole to move downwards in the outer cylinder to form a string of vortex rings (jellyfish shape), the downward movement is stopped after a certain time, the string of vortex rings formed by the liquid in the outer cylinder to the inner cylinder reversely are appeared (the phenomenon that a point which is punched on paper by a point punching timer in a gravity acceleration test is gradually changed into jellyfish shape and is changed from small to large to a novel interesting phenomenon), if the inner cylinder is filled with 50 ml of 20% saline water, the phenomenon can last for more than 24 hours, researchers can repeatedly observe and pay attention to other apertures, if a glass tube with the aperture of 2., the requirements cannot be met.

During the experiment, the device is placed in a dark place of ambient light, the light source is started to irradiate the automatic vortex ring forming device, the observation hole can see that a large number of images are converged and contracted towards the center when the vortex ring moves downwards (moves towards the vertex angle direction of the two plane mirrors), and a large number of images are radiated and diffused outwards from the center when the vortex ring moves upwards (moves towards the direction far away from the vertex angle of the two plane mirrors); when the included angles between the two plane mirrors are adjusted to be different (the included angles are measured by an angle measuring instrument), the included angles of the motion directions of a large number of images are different.

The included angle formation of image law to between the two level mirrors is helped, and the production formation of image assembles and the understanding of radiation diffusion effect, and the effect of single object direction of motion and global motion also helps arousing the jellyfish form motion exploration that appears in turn simultaneously, and the increase is interesting, and novelty arouses the desire of exploring, and the easy contrast research of audio-visual image.

Its unique character of this patent is obviously different with prior art, has realized at different contained angles and spatial position between two level mirrors of elastic webbing control, and the vortex ring (jellyfish form) motion by the long-time automatic motion direction change of non-electric power changes in turn studies the technique of formation of image radiation and shrink motion law, thinks about ingeniously, and the preparation is extremely simple and easy, and the effect is obvious, promotes in the teaching and can increase more educational functions.

Drawings

Fig. 1, a two-plane mirror imaging principle diagram,

FIG. 2 is a schematic diagram showing the structure and phenomenon of an automatic vortex ring forming device,

fig. 3 is a schematic structural diagram of the patent. Wherein: 1. the device comprises a horizontal flat plate, 1-1 central groove, 2 illuminating lamp, 3 eddy current ring automatic former, 3-1 eddy current ring, 4 plane mirror, 5 elastic belt, 6 hinge, 7 semicircular instrument and 7-1 observation hole.

Detailed Description

As shown in the attached figure 3: a variable-included-angle mirror radiation and contraction dynamic imaging experimental instrument mainly comprises a horizontal flat plate 1, a central groove 1-1, an illuminating lamp 2, an eddy current ring automatic former 3, an eddy current ring 3-1, a plane mirror 4, an elastic belt 5, a hinge 6, a semi-circular instrument 7 and an observation hole 7-1, and is characterized in that: two strip-shaped plane mirrors 4 with equal size are respectively fixed on two movable hinges 6 (the reflecting surfaces are opposite, the included angle between the two strip-shaped plane mirrors can be changed within the range of 0-180 degrees), a central groove 1-1 is arranged at the central shaft of the horizontal plane 1, and the hinge 6 shaft on the plane mirror 4 is positioned in the central groove 1-1 [ the position for limiting the vertex angle (top edge) of the two plane mirrors 4 ]; an elastic webbing 5 is around two rectangular shape level crossing 4 edges, fixes both ends on horizontal plate 1 after 5 tensile (taut) elastic webbing 5 [ elastic webbing 5 can control the contained angle size between the level crossing 4 and the overall position in space of level crossing 4, the concrete way: the elastic belt 5 is pulled up and is not in contact with the two plane mirrors 4, the included angle between the two plane mirrors 4 and the diagonal line of the two plane mirrors 4 are adjusted to be at the vertical position, then the elastic belt 5 is released, the elastic belt 5 is in contact with the two plane mirrors 4, the included angle between the two plane mirrors 4 and the position in space are determined, the edges of the two strip-shaped plane mirrors 4 are subjected to chamfering treatment to prevent the elastic belt 5 from being cut off, the elastic belt 5 is the elastic belt 5 with a larger elastic coefficient, grooves with equal intervals are formed in the surface of the elastic belt 5, the width of each groove is equal to the thickness of each plane mirror 4, and the grooves of the elastic belt 5 are in contact with the edges of the plane mirrors 4 towards the plane mirrors 4; the midpoint of the bottom edge of a semicircle instrument (angulometer) 7 with an observation hole 7-1 is superposed with the extension line of the intersection line of the reflecting surfaces of the two strip-shaped plane mirrors 4, and the extension line of the vertical intersection line of the semicircle instrument 7 is fixed on the horizontal flat plate 1; the vortex ring automatic generator 3 is fixed on the horizontal flat plate 1, and the motion direction of a vortex ring 3-1 in the vortex ring automatic generator 3 is on an extension plane of an equal division plane of an included angle between two strip-shaped plane mirrors 4 (ensuring that an image of the vortex ring 3-1 can be observed through an observation hole 7-1 of a semi-circular instrument 7); the illuminating lamp 2 is fixed on the horizontal flat plate 1.

Referring to fig. 2, the vortex ring automatic former: a perforated rubber ring a is fixed on the inner side of the outer cylinder, a glass tube is sleeved with the rubber ring b, the inner diameter of the rubber ring a is matched with the outer diameter of the rubber ring b, the inner cylinder and the outer cylinder are transparent, a perforated rubber plug c is arranged at the opening of the inner cylinder, the outer diameter of the communicating tube (rubber tube) is matched with the aperture of the perforated rubber plug c and the aperture of the perforated rubber ring a, and the communicating tube penetrates through the hole of the perforated rubber plug c and the hole of the perforated rubber ring a to be sealed and fixed, so that the inner cylinder and the outer cylinder are fixedly communicated (isobaric, and liquid of the inner cylinder and the outer cylinder is prevented; experimental parameters: at normal temperature, 20-25% saline water is filled in the inner cylinder, clear water is filled in the outer cylinder, the thickness of a thin iron sheet fixed at the bottom of the inner cylinder is 0.055mm, and the aperture on the iron sheet is 0.396 mm. Note that other pore diameters, such as a 2.5mm long 3.1cm glass tube, are susceptible to cross-flow and do not meet the requirements.

During the experiment, the device is placed in a slightly dark place of ambient light, the illuminating lamp 2 is started to irradiate the automatic vortex ring forming device 3, and the observation hole 7-1 can see that a large number of images are converged and shrunk towards the center when the vortex ring 3-1 moves downwards (moves towards the vertex angle direction of the two plane mirrors), and a large number of images are radiated and diffused outwards from the center when the vortex ring 3-1 moves upwards (moves towards the direction far away from the vertex angle direction of the two plane mirrors); when the included angles between the two plane mirrors 4 are adjusted to be different (the included angles are measured by the semi-circular instrument 7), the included angles of the motion directions of a large number of images are different.

It is to be understood that this description is only illustrative and explanatory of the spirit and nature of this patent, and that any modifications and alterations from this patent are intended to fall within the scope of this patent.

Claims (2)

1. The utility model provides a become contained angle face mirror radiation and shrink dynamic imaging experiment appearance, mainly comprises horizontal plate (1), central recess (1-1), light (2), vortex ring automatic forming ware (3), vortex ring (3-1), level crossing (4), elastic webbing (5), hinge (6), semicircle appearance (7), observation hole (7-1), characterized by: two strip-shaped plane mirrors (4) with equal size are respectively fixed on two movable hinges (6), a central groove (1-1) is arranged at the central shaft of the horizontal plane (1), and the hinge (6) shaft on the plane mirror (4) is positioned in the central groove (1-1); an elastic belt (5) winds the edges of two long-strip-shaped plane mirrors (4), two ends of the elastic belt (5) are fixed on a horizontal flat plate (1) after being stretched, the edges of the two long-strip-shaped plane mirrors (4) are subjected to chamfering treatment to prevent the elastic belt (5) from being cut off, the elastic belt (5) is an elastic belt (5) with a large elastic coefficient, grooves with equal intervals are formed in the surface of the elastic belt (5), the width of each groove is equal to the thickness of each plane mirror (4), and the grooves of the elastic belt (5) face the plane mirrors (4) and are in contact with the edges of the plane mirrors (4; the bottom edge of a semicircle instrument (7) with an observation hole (7-1) is superposed with the extension line of the intersection line of the reflecting surfaces of the two strip-shaped plane mirrors (4), and the extension line of the vertical intersection line of the semicircle instrument (7) is fixed on the horizontal flat plate (1); the vortex ring automatic forming device (3) is fixed on the horizontal flat plate (1), and the motion direction of a vortex ring (3-1) in the vortex ring automatic forming device (3) is on an extension surface of an equal division surface of an included angle between two strip-shaped plane mirrors (4); the illuminating lamp (2) is fixed on the horizontal flat plate (1).

2. The experimental instrument for radiation and shrinkage dynamic imaging of a variable-angle mirror according to claim 1, wherein: aperture parameters of the vortex ring automatic former (3): the thickness of the thin iron sheet fixed at the bottom of the inner cylinder is 0.055mm, and the aperture on the iron sheet is 0.396 mm.

Images