Schlieren imaging principle demonstration teaching aid

Abstract

The utility model belongs to the technical field of physics teaching demonstration teaching aids, and particularly relates to a schlieren imaging principle demonstration teaching aid, which comprises a guide rail convenient to disassemble and assemble, a concave reflector mechanism, an observation object mechanism and a schlieren imaging mechanism, the concave reflector mechanism comprises a concave mirror body capable of being adjusted in a three-dimensional mode, the schlieren imaging mechanism comprises an intelligent mobile phone capable of being adjusted in a three-dimensional mode, and an LED lamp and a camera are arranged in the intelligent mobile phone and used for emitting and receiving a light source for schlieren imaging respectively. The concave mirror body, the intelligent mobile phone and the spacing-adjustable concave mirror mechanism, the observation object mechanism and the schlieren imaging mechanism enable the assembly and disassembly of the whole teaching aid to be simple and fast, the concave mirror body and the intelligent mobile phone can be subjected to three-dimensional adjustment, the accuracy and flexibility of the imaging effect are ensured, the teaching efficiency and quality are improved, and the teaching aid is worthy of popularization and application. And a positive contribution is made to the development of education business.

Description

Technical Field

[0001] The utility model belongs to the technical field of physics teaching demonstration teaching aids, in particular to a schlieren imaging principle demonstration teaching aid. Background Art

[0002] Schlieren imaging is a technology that uses changes in light refraction to visualize fluid flow or tiny changes in the surface morphology of an object. It uses the change in the propagation direction of light when passing through a density gradient fluid to form an interference fringe image of alternating light and dark, thereby revealing invisible fluid dynamics phenomena or the surface morphology of an object. The Schlieren imaging demonstration teaching aid is a teaching tool specially designed to intuitively demonstrate the principles of Schlieren imaging. By simulating the Schlieren imaging process, it helps students understand optical phenomena such as refraction, interference and diffraction of light, as well as how these phenomena are applied to Schlieren imaging technology.

[0003] A Chinese patent, publication number CN215868342U, discloses a teaching aid for demonstrating the principles of Schlieren photography. The device comprises, in order of optical path, a light source, a reflector, a blade, and a camera, mounted on a stand. The stand comprises an "I"-shaped base, and first and second uprights connected at either end of the "I"-shaped base. The first upright is connected to a mounting box, and the reflector is mounted on the second upright. The light source and blade are located 1.8 to 2.2 times the focal length of the reflector. This device offers advantages such as simple structure, high reliability, and easy commissioning.

[0004] There are still some problems in the use of the above-mentioned Schlieren camera principle demonstration teaching aid. The I-shaped base cannot be disassembled. Due to its long length, it is extremely inconvenient for users to store and move it. In addition, the first and second vertical poles at both ends of the I-shaped base are fixed, which makes it impossible to adjust the distance between the mounting box and the reflector. At the same time, the angles and heights of the two cannot be adjusted, which makes the use of the entire teaching aid very limited, and the imaging effect is not accurate enough and lacks flexibility. The above-mentioned Schlieren camera principle demonstration teaching aid does not effectively solve these problems; therefore, a Schlieren imaging principle demonstration teaching aid is proposed to address the above problems. Utility Model Content

[0005] In order to make up for the shortcomings of the existing Schlieren photography principle demonstration teaching aids, solve the problems of inconvenience in storing and moving the equipment, the inability to adjust the distance between the mounting box and the reflector, the inability to adjust the angle height, the large limitations of the teaching aids, the imprecise imaging effect and the lack of flexibility, a Schlieren imaging principle demonstration teaching aid is proposed.

[0006] The utility model solves its technical problem adopts the technical scheme that the utility model discloses a kind of stria imaging principle demonstration teaching aid, including guide rail, the guide rail is by first guide rail and second guide rail splicing assembly composition, the cooperation surface between first guide rail and second guide rail is provided with the butt joint structure for making both keep horizontal straight line, adjustable interval's concave mirror mechanism, observation object mechanism, stria imaging mechanism are slidably assembled on the guide rail, the stria imaging mechanism includes smart phone, second sliding block, the second sliding block is fixedly assembled with the second three-dimensional adjustment seat that can be adjusted for smart phone to carry out three-dimensional adjustment, the second three-dimensional adjustment seat is fixedly assembled with stand on it, the stand is sleeved with the lifting platform that can be adjusted in height on it, the lifting platform is rotatably assembled with the clamp for clamping and fixing smart phone on it by rotating seat, the second three-dimensional adjustment seat is used for adjusting and controlling smart phone to carry out multi-angle multi-position adjustment, LED lamp and camera are built-in in the smart phone respectively for emitting and receiving light source to carry out stria imaging.

[0007] Preferably, the first guide rail and the second guide rail are provided with first and second protrusions on the inner walls of the grooves on both sides, and the first protrusion is shorter than the second protrusion, one end of the second protrusion protrudes from the second guide rail, the butt joint structure includes a butt joint groove at one end of the first guide rail, and a butt joint portion that is inserted into the butt joint groove, the butt joint portion is composed of the second protrusion protruding from the second guide rail.

[0008] Preferably, the concave mirror mechanism includes a first sliding block, the first sliding block is slidably assembled on the guide rail, the first sliding block is fixedly assembled with a first three-dimensional adjustment seat, the first three-dimensional adjustment seat is assembled with a concave mirror body, and the first three-dimensional adjustment seat can adjust and control the concave mirror body to carry out multi-angle multi-position adjustment.

[0009] Preferably, the LED lamp and the camera are located at twice the focal length of the concave mirror body.

[0010] Preferably, the stand is fixedly provided with a rack on one side, the lifting platform is rotatably assembled with a first adjusting rod on one side, the first adjusting rod is fixedly provided with a gear, and the gear is engaged with the rack.

[0011] Preferably, the stand is rotatably assembled with a second adjusting rod on one side, one end of the second adjusting rod is rotatably provided with a guide block, and the guide block is inserted into the guide slot to cooperate with each other.

[0012] Preferably, the lifting platform is provided with a fixing bolt for fixing the rotating seat.

[0013] Preferably, the observation object mechanism is located between the concave mirror mechanism and the schlieren imaging mechanism on the guide rail, and is arranged close to the concave mirror mechanism, the observation object mechanism comprising a third sliding block, a carrier for placing an observation object being fixedly arranged on the third sliding block.

[0014] Preferably, a locking handle for locking the first sliding block, the second sliding block and the third sliding block is arranged on each of the first sliding block, the second sliding block and the third sliding block.

[0015] Preferably, a scale is fixedly arranged on the side of the guide rail for observing the distance between the concave mirror mechanism, the observation object mechanism and the schlieren imaging mechanism.

[0016] The present application has the following beneficial effects:

[0017] The present application provides a schlieren imaging principle demonstration teaching aid, which has a simple and reliable overall structure, and a guide rail design which is convenient to disassemble and assemble, so that the user can conveniently store and carry the teaching aid, and the concave mirror mechanism, the observation object mechanism and the schlieren imaging mechanism can be adjusted in distance, so that the assembly and disassembly of the entire teaching aid is simple and fast, the concave mirror body and the smart phone can be adjusted in three dimensions, the efficiency of experimental scene arrangement is improved, the accuracy and flexibility of imaging effect are ensured, the teaching efficiency and quality are improved, and positive contributions are made to the development of the education industry. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application, form a part of the present application, and the schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 is an overall structural view;

[0020] Figure 2 is Figure 1 is an enlarged view of structure at A in FIG.

[0021] Figure 3 is a top view of the stand and the lifting platform;

[0022] Figure 4 is a light path diagram of the present application;

[0023] Figure 5 is a structural schematic view of the butt joint structure on the first guide rail and the second guide rail;

[0024] Legend:

[0025] 1, guide rail; 01, first convex strip; 02, second convex strip; 101, first guide rail; 102, second guide rail; 100, butt joint structure; 1001, butt joint groove; 1002, butt joint part; 2, concave mirror mechanism; 201, first sliding block; 202, first three-dimensional adjusting seat; 203, concave mirror body; 3, observation object mechanism; 301, third sliding block; 302, carrier; 303, observation object; 4, schlieren imaging mechanism; 401, second sliding block; 402, second three-dimensional adjusting seat; 403, stand; 4031, rack; 4032, guide groove; 404, lifting platform; 4041, first adjusting rotating rod; 4042, second adjusting rotating rod; 4043, fixing bolt; 4044, gear; 4045, guide block; 405, rotating seat; 406, clamp; 407, smart phone; 4071, LED lamp; 4072, camera; 5, locking handle; 6, scale. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] Specific embodiments are given below.

[0028] Please refer to Figures 1-5The utility model discloses a striation imaging principle demonstration teaching aid, including guide rail 1, the guide rail 1 is by first guide rail 101 and second guide rail 102 splicing assembly composition, the cooperation face between first guide rail 101 and second guide rail 102 is provided with the butt joint structure 100 for making both keep horizontal straight line, the recessed mirror mechanism 2 of adjustable spacing, observation object mechanism 3, striation imaging mechanism 4 are slidably assembled on the guide rail 1, the recessed mirror mechanism 2 includes the concave mirror body 203 that can carry out three -dimensional adjustment, the striation imaging mechanism 4 includes second sliding block 401, the second three -dimensional adjustment seat 402 is fixedly assembled on second sliding block 401, the second three -dimensional adjustment seat 402 is fixedly assembled with riser 403, the riser 403 is sheathed with the height -adjustable lifting platform 404 that can carry out adjustment, the lifting platform 404 is rotatably assembled with the fixture 406 for clamping fixed smart phone 407 through rotating seat 405, the second three -dimensional adjustment seat 402 is used for adjusting control smart phone 407 carries out multi -angle multi -position adjustment, the built -in LED lamp 4071 with camera 4072 of smart phone 407 is used for emitting and receiving light source respectively carries out striation imaging, the recessed groove inner wall both sides on first guide rail 101 and second guide rail 102 are all provided with first convex strip 01 and second convex strip 02 respectively, and first convex strip 01 is shorter than second convex strip 02, and one end of second convex strip 02 projects second guide rail 102, the butt joint structure 100 includes the butt joint groove 1001 at one end of first guide rail 101, still includes with the butt joint groove 1001 and inserts the cooperation of butt joint portion 1002, the butt joint portion 1002 is formed by the second convex strip 02 of projecting second guide rail 102;

[0029] The recessed mirror mechanism 2 includes a first sliding block 201, the first sliding block 201 is slidably assembled on the guide rail 1, the first three -dimensional adjustment seat 202 is fixedly assembled on the first sliding block 201, the concave mirror body 203 is assembled on the first three -dimensional adjustment seat 202, the first three -dimensional adjustment seat 202 can adjust the concave mirror body 203 to carry out multi -angle multi -position adjustment, the LED lamp 4071 and the camera 4072 are located at the two times focal length of the concave mirror body 203;

[0030] The observation object mechanism 3 is located between the recessed mirror mechanism 2 and the striation imaging mechanism 4 on the guide rail 1, and is arranged close to the recessed mirror mechanism 2, the observation object mechanism 3 includes a third sliding block 301, the third sliding block 301 is fixedly assembled with a carrier 302 for placing an observation object 303;

[0031] The lifting platform 404 is provided with a fixing bolt 4043 for fixing the rotating seat 405; the first sliding block 201, the second sliding block 401 and the third sliding block 301 are all equipped with locking handles 5 for locking them; in operation, the user assembles the first guide rail 101 and the second guide rail 102 through the butt joint structure 100, inserts the butt joint part 1002 on the second guide rail 102 into the butt joint groove 1001 on the first guide rail 101, and then splices the two together to form the integral guide rail 1; then the user fixes the smart phone 407 by using the clamp 406, turns on the LED lamp 4071 and the camera 4072 on the smart phone 407, adjusts the position of the shadow imaging mechanism 4 on the guide rail 1 by sliding the second sliding block 401, adjusts the position of the concave mirror mechanism 2 on the guide rail 1 by sliding the first sliding block 201, so that the distance between the concave mirror body 203 and the LED lamp 4071 and the camera 4072 is twice the focal length, then fixes the positions of the two on the guide rail 1 by the locking handles 5 on the first sliding block 201 and the second sliding block 401, then places the observation object 303 on the carrier 302, and adjusts the position and angle of the concave mirror body 203 in multiple directions by operating the first three-dimensional adjusting seat 202; similarly, the position and angle of the smart phone 407 can also be adjusted in multiple directions by the second three-dimensional adjusting seat 402, and the user can further improve the diversity of adjustment by rotating the clamp 406 to drive the smart phone 407 to rotate; until the light source reflected by the concave mirror body 203 is irradiated into the camera 4072, and the user adjusts the concave mirror body 203 or the smart phone 407 to make only half of the reflected light source irradiate into the camera 4072 to achieve the purpose of cutting half of the light source; the whole structure is simple and reliable, the guide rail 1 is designed to be easy to disassemble and assemble, and the concave mirror mechanism 2, the observation object mechanism 3 and the shadow imaging mechanism 4 can adjust the distance, so that the assembly and disassembly of the whole teaching aid become simple and fast, the concave mirror body 203 and the smart phone 407 can be adjusted in three dimensions, ensuring the accuracy and flexibility of the imaging effect, improving the teaching efficiency and quality, and improving the efficiency of the teacher in assembling the whole teaching aid before class.

[0032] Further, one side of the column 403 is fixedly provided with a rack 4031, and one side of the lifting platform 404 is rotatably provided with a first adjusting rotating rod 4041, and the first adjusting rotating rod 4041 is fixedly provided with a gear 4044, and the gear 4044 is engaged with the rack 4031; in operation, when the user adjusts the height position of the smart phone 407, the user can rotate the first adjusting rotating rod 4041 to make the gear 4044 rotate, and then drive the lifting platform 404 to lift, so as to adjust the height of the smart phone 407, and the height adjustment range is more extensive.

[0033] Further, one side of the column 403 is provided with a guide groove 4032, one side of the lifting platform 404 is rotatably provided with a second adjusting rotating rod 4042, one end of the second adjusting rotating rod 4042 is rotatably provided with a guide block 4045, the guide block 4045 is inserted into the guide groove 4032 and matched with each other, when the lifting platform 404 is lifted on the column 403, the guide block 4045 is matched with the guide groove 4032 to limit the angle of the lifting platform 404, and when the height of the lifting platform 404 is adjusted, the second adjusting rotating rod 4042 is rotated to make the guide block 4045 abut against the guide groove 4032 to limit the height of the lifting platform 404.

[0034] Further, the side surface of the guide rail 1 is fixedly provided with a scale 6 for observing the distance between the concave mirror mechanism 2, the observation object mechanism 3 and the schlieren imaging mechanism 4, when the user adjusts the distance between the concave mirror mechanism 2, the observation object mechanism 3 and the schlieren imaging mechanism 4, in order to make the adjustment process more convenient and more accurate, the user can observe the scale 6 to accurately adjust and control the distance between the three, thereby improving the accuracy and effect of the subsequent schlieren imaging experiment.

[0035] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0036] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A teaching aid for demonstrating the principle of Schlieren imaging, comprising a guide rail (1), characterized in that: The guide rail (1) is composed of a first guide rail (101) and a second guide rail (102) spliced ​​together, a docking structure (100) for maintaining a horizontal straight line between the mating surfaces of the first guide rail (101) and the second guide rail (102), and a concave reflector mechanism (2) with adjustable spacing, an observation object mechanism (3), and a Schlieren imaging mechanism (4) are slidably mounted on the guide rail (1), wherein the Schlieren imaging mechanism (4) comprises a smart phone (407), a second slider (401), and a fixed slider (401) for adjusting the distance between the first guide rail (101) and the second guide rail (102). A second three-dimensional adjustment seat (402) for three-dimensionally adjusting a smartphone (407) is provided. A column (403) is fixedly mounted on the second three-dimensional adjustment seat (402). A lifting platform (404) capable of adjusting height is mounted on the column (403). A fixture (406) for clamping and fixing the smartphone (407) is rotatably mounted on the lifting platform (404) via a rotating seat (405). The smartphone (407) is equipped with a built-in LED light (4071) and a camera (4072) for transmitting and receiving light sources for schlieren imaging, respectively.

2. A Schlieren imaging principle demonstration teaching aid according to claim 1, characterized in that: A first convex strip (01) and a second convex strip (02) are respectively provided on both sides of the inner wall of the groove on the first guide rail (101) and the second guide rail (102), and the first convex strip (01) is shorter than the second convex strip (02), and one end of the second convex strip (02) protrudes from the second guide rail (102). The docking structure (100) includes a docking groove (1001) located at one end of the first guide rail (101), and also includes a docking portion (1002) that is plugged into the docking groove (1001), and the docking portion (1002) is composed of the second convex strip (02) protruding from the second guide rail (102).

3. The Schlieren imaging principle demonstration teaching aid according to claim 1, characterized in that: The concave reflector mechanism (2) comprises a first slider (201), the first slider (201) being slidably mounted on a guide rail (1), a first three-dimensional adjustment seat (202) being fixedly mounted on the first slider (201), a concave mirror body (203) being mounted on the first three-dimensional adjustment seat (202), and the first three-dimensional adjustment seat (202) being capable of adjusting and controlling the concave mirror body (203) to perform multi-angle and multi-position adjustments.

4. The Schlieren imaging principle demonstration teaching aid according to claim 1, characterized in that: The LED light (4071) and the camera (4072) are both located at twice the focal length of the concave mirror body (203).

5. The Schlieren imaging principle demonstration teaching aid according to claim 1, characterized in that: A rack (4031) is fixedly provided on one side of the column (403), and a first adjusting rotating rod (4041) is rotatably mounted on one side of the lifting platform (404). A gear (4044) is fixedly provided on the first adjusting rotating rod (4041), and the gear (4044) is meshed with the rack (4031).

6. A Schlieren imaging principle demonstration teaching aid according to claim 1 or 5, characterized in that: A guide groove (4032) is provided on one side of the column (403), and a second adjusting rod (4042) is rotatably mounted on one side of the lifting platform (404). A guide block (4045) is rotatably mounted on one end of the second adjusting rod (4042), and the guide block (4045) is inserted into the guide groove (4032) and cooperates with each other.

7. A Schlieren imaging principle demonstration teaching aid according to claim 1 or 5, characterized in that: The lifting platform (404) is provided with fixing bolts (4043) for fixing the rotating seat (405).

8. The Schlieren imaging principle demonstration teaching aid according to claim 3, characterized in that: The observation object mechanism (3) is located between the concave reflector mechanism (2) and the schlieren imaging mechanism (4) on the guide rail (1), and is arranged close to the concave reflector mechanism (2). The observation object mechanism (3) includes a third slider (301), and a carrier (302) for placing an observation object (303) is fixedly mounted on the third slider (301).

9. The Schlieren imaging principle demonstration teaching aid according to claim 8, characterized in that: The first slider (201), the second slider (401), and the third slider (301) are all equipped with a locking handle (5) for braking them.

10. The Schlieren imaging principle demonstration teaching aid according to claim 1, characterized in that: A scale (6) for observing the spacing between the concave reflector mechanism (2), the observation object mechanism (3), and the schlieren imaging mechanism (4) is fixedly provided on the side surface of the guide rail (1).

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