Electromagnetic wave polarization characteristic demonstration device for teaching

Abstract

The utility model belongs to the field of teaching appliances, and discloses an electromagnetic wave polarization characteristic demonstration device for teaching, which comprises a support device used for supporting and displaying, and a translation device arranged in the middle of the support device and used for simulating electromagnetic wave motion, and the translation device is in sliding connection with the support device; the translation device comprises a sliding rod, a handle is installed at one end of the sliding rod, a plurality of fixing holes are evenly distributed in the sliding rod, and simulation rods are installed in the fixing holes. According to the electromagnetic wave polarization characteristic demonstration device for teaching, electromagnetic wave polarization is concrete into the arrangement of the simulation rod, so that the intuition of electromagnetic wave polarization is enhanced; when the simulation rods move and pass through the fixing plate, the arrangement of the position pointed by each simulation rod is recorded one by one, whether the polarization characteristic of electromagnetic waves is linear polarization or circular polarization and the space-time rotation direction relation of the circular polarization electromagnetic waves are visually displayed, and students can conveniently observe, understand and memorize.

Description

Technical Field

[0001] The utility model belongs to the field of teaching tools, in particular to a teaching electromagnetic wave polarization characteristic demonstration device. Background Art

[0002] Electromagnetic waves are classical (non-quantum) fields generated by (moving) electric charges. They are described by classical electrodynamics (classical field theory) and are the classical counterpart of the quantized electromagnetic field tensor in quantum electrodynamics (quantum field theory). Electromagnetic waves propagate at the speed of light (in fact, this field can be identified as light) and interact with electric charges and electric currents. Its quantum counterpart is one of the four fundamental forces of nature.

[0003] In contrast, the Chinese patent with announcement number CN217955319U discloses a high school physics electromagnetic teaching display device, including a base plate, a vertical plate, a bracket, a U-shaped magnet, a reciprocating mechanism, a U-shaped frame, a cutting rod, a battery, a speed regulator, an ammeter, a wire, and a speedometer; the vertical plate is arranged on the base plate; the bracket is a rectangular body with a U-shaped cross-section, and one end of the bracket is connected to the vertical plate; the U-shaped magnet is arranged in the bracket; the reciprocating mechanism is arranged on the base plate, and the reciprocating mechanism is located on the opposite side of the open end of the U-shaped magnet; the bottom end of the U-shaped frame is connected to the reciprocating mechanism; the cutting rod is a metal rod, and the cutting rod is arranged in the U-shaped frame, and the plane where the cutting rod is located is located inside the U-shaped magnet; the battery, the speed regulator, and the ammeter are all arranged on the base plate; two wires are arranged, one end of the two wires is respectively connected to the cutting rod, and the other end is connected to the ammeter; the speedometer is arranged on the U-shaped frame.

[0004] However, the above patent cannot demonstrate another characteristic of electromagnetic waves, namely polarization, based on engineering electromagnetic waves, and cannot enable students to observe intuitively. Therefore, a new device must be designed. Utility Model Content

[0005] The utility model aims to provide a teaching electromagnetic wave polarization characteristic demonstration device to solve the problem that it is difficult to orally explain or understand on a plane diagram the time and space relationship of electromagnetic wave polarization, especially polarization rotation direction in circular polarization, in electromagnetic wave teaching in engineering universities.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A teaching electromagnetic wave polarization characteristic demonstration device comprises a bracket device for supporting display, and also comprises a translation device arranged in the middle of the bracket device for simulating electromagnetic wave movement, the translation device and the bracket device are slidably connected; the translation device comprises a slide bar, one end of which is provided with a handle, a plurality of fixing holes are evenly distributed on the slide bar, a simulation rod is installed in the fixing hole, two limit sliders are symmetrically arranged on the slide bar, the simulation rod and the slide bar are plug-in connected, the simulation rod is composed of a plurality of straight rods, and the top end forms a waveform; the fixing holes are divided into two groups, the first group is distributed along the upper and lower straight lines of the slide bar, and the second group is distributed along the circumference of the slide bar in a spiral.

[0008] Furthermore: the support device includes a bottom plate, two support frames are symmetrically arranged at both ends of the bottom plate, a fixing plate is arranged in the middle of the bottom plate, and a through hole is arranged in the middle of the fixing plate.

[0009] Furthermore: the support frame and the fixing plate are uniformly made of one of polypropylene, wood or metal materials.

[0010] Furthermore: a limiting groove is arranged at the top of the support frame, and the fixing plate is parallel to the support frame.

[0011] Furthermore, the slide bar is cylindrical, the limit slider is rectangular, and the limit slider and the slide bar are riveted together.

[0012] Furthermore: the analog stick is made of bamboo, wood or metal material.

[0013] Compared with the prior art, the beneficial effects are:

[0014] 1. By visualizing the polarization of electromagnetic waves as the setting of analog rods, the intuitiveness of the polarization of electromagnetic waves is enhanced;

[0015] 2. When the simulation rod moves through the fixed plate, record the settings of the position indicated by each simulation rod one by one, and intuitively display the polarization characteristics of the electromagnetic wave as linear polarization or circular polarization, as well as the relationship between the time and space rotation direction of the circularly polarized electromagnetic wave, to facilitate students' observation, understanding and memory. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a first assembly method of a teaching electromagnetic wave polarization characteristic demonstration device described in the utility model;

[0017] Figure 2 This is a schematic diagram of a first assembly method of a translation device of a teaching electromagnetic wave polarization characteristic demonstration device described in the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the second assembly method of the electromagnetic wave polarization characteristic demonstration device for teaching described in the utility model;

[0019] Figure 4This is a schematic diagram of a second assembly method of the translation device of the electromagnetic wave polarization characteristic demonstration device for teaching described in the utility model;

[0020] Figure 5 This is a schematic diagram of a bracket device of a teaching electromagnetic wave polarization characteristic demonstration device described in the utility model;

[0021] Figure 6 The utility model is a schematic diagram of the distribution of fixed holes of a teaching electromagnetic wave polarization characteristic demonstration device.

[0022] In the accompanying drawings, numerals are as follows: 1. bracket device; 101. bottom plate; 102. support frame; 103. fixing plate; 104. through hole; 2. translation device; 201. sliding bar; 202. handle; 203. fixing hole; 204. limit slider; 205. simulation rod. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-Figure 6 A teaching electromagnetic wave polarization characteristic demonstration device includes a bracket device 1 for supporting the display, and also includes a translation device 2 arranged in the middle of the bracket device 1 for simulating the movement of electromagnetic waves, and the translation device 2 and the bracket device 1 are slidably connected.

[0025] In this embodiment: the bracket device 1 includes a bottom plate 101, two support frames 102 are symmetrically arranged at both ends of the bottom plate 101, a limiting groove is arranged at the top of the support frame 102, a fixing plate 103 is arranged in the middle of the bottom plate 101, the fixing plate 103 is parallel to the support frame 102, and a through hole 104 is arranged in the middle of the fixing plate 103. The support frame 102 and the fixing plate 103 are uniformly made of polypropylene material, and the whole is placed on the podium through the bottom plate 101. The limiting groove at the top of the support frame 102 supports and limits the sliding of the limiting sliders 204 at both ends of the sliding rod 201, and the simulation rod 205 passes through the through hole 104 in the middle of the fixing plate 103 from one side of the fixing plate 103 to the other side, demonstrating the polarization characteristics of electromagnetic waves;

[0026] In this embodiment: the translation device 2 includes a slide bar 201, which is cylindrical, and a handle 202 is installed at one end of the slide bar 201. A number of fixing holes 203 are evenly distributed on the slide bar 201, and a simulation rod 205 is installed in the fixing hole 203. The simulation rod 205 is made of wood material, and two limit sliders 204 are symmetrically arranged on the slide bar 201. The limit slider 204 is a rectangular column, and the limit slider 204 and the slide bar 201 are riveted together. The simulation rod 205 and the slide bar 201 are plug-in connected, and the simulation rod 205 is composed of a plurality of straight rods, and the top end forms a waveform. The slide bar 201 is pulled by the handle 202 to drive the simulation rod 205 to move, and the limit sliders 204 at both ends of the slide bar 201 slide in the limit groove at the top end of the support frame 102 to prevent the slide bar 201 from rotating, thereby ensuring the direction of the simulation rod 205, that is, a stable electromagnetic wave shape;

[0027] The fixing holes 203 are divided into two groups, the first group is distributed in a straight line up and down along the sliding rod 201, and the second group is distributed in a circular spiral along the sliding rod 201. The analog rod 205 is inserted into the first group of fixing holes 203 on the sliding rod 201 to form a planar arrangement, indicating linear polarization, or the analog rod 205 is inserted into the second group of fixing holes 203 on the sliding rod 201 to form a circular spiral distribution, indicating circular polarization.

[0028] Working principle: Place the whole on the podium through the bottom plate 101, insert the simulation rod 205 into the first group of fixing holes 203 on the slide bar 201 to form a planar arrangement, indicating linear polarization, or insert the simulation rod 205 into the second group of fixing holes 203 on the slide bar 201 to form a circular spiral distribution, indicating circular polarization, pull the slide bar 201 through the handle 202 to drive the simulation rod 205 to move, and the limit groove at the top of the support frame 102 supports and limits the limit sliders 204 at both ends of the slide bar 201 to slide, preventing the slide bar 201 from rotating, ensuring the direction of the simulation rod 205, that is, a stable electromagnetic wave shape, so that the simulation rod 205 passes through the through hole 104 in the middle of the fixing plate 103 from one side of the fixing plate 103 to the other side, demonstrating the polarization characteristics of the electromagnetic wave, and recording the position of each simulation rod 205 one by one, intuitively displaying the polarization characteristics of the electromagnetic wave as linear polarization or circular polarization, and the spatial-temporal rotation relationship of the circularly polarized electromagnetic wave.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A teaching electromagnetic wave polarization characteristic demonstration device, comprising a support device for supporting the display, characterized in that: It also includes a translation device for simulating electromagnetic wave movement disposed in the middle of the support device, and the translation device is slidably connected to the support device; The translation device comprises a slide bar, a handle is installed at one end of the slide bar, a plurality of fixing holes are evenly distributed on the slide bar, a simulation rod is installed in the fixing hole, two limit sliders are symmetrically arranged on the slide bar, the simulation rod is plug-in connected to the slide bar, and the simulation rod is composed of a plurality of straight rods, and the top end forms a waveform; The fixing holes are divided into two groups, the first group is distributed along the upper and lower straight lines of the slide bar, and the second group is distributed along the circumference of the slide bar in a spiral.

2. The electromagnetic wave polarization characteristic demonstration device for teaching according to claim 1, characterized in that: The support device comprises a bottom plate, two support frames are symmetrically arranged at two ends of the bottom plate, a fixing plate is arranged in the middle of the bottom plate, and a through hole is arranged in the middle of the fixing plate.

3. The electromagnetic wave polarization characteristic demonstration device for teaching according to claim 2, characterized in that: The support frame and the fixing plate are uniformly made of one of polypropylene, wood or metal materials.

4. The electromagnetic wave polarization characteristic demonstration device for teaching according to claim 2, characterized in that: A limiting groove is arranged on the top of the support frame, and the fixing plate is parallel to the support frame.

5. The electromagnetic wave polarization characteristic demonstration device for teaching according to claim 1, characterized in that: The slide rod is cylindrical, the limit slider is rectangular, and the limit slider and the slide rod are riveted together.

6. The electromagnetic wave polarization characteristic demonstration device for teaching according to claim 1, characterized in that: The simulation rod is made of bamboo, wood or metal.

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