Clariy board graph demonstration device

Abstract

The utility model relates to a device for demonstrating a Clariy board graph. The utility model comprises a Clariy board device and a mobile phone. The Clariy board device comprises a bottom plate, a demonstration box, a Bluetooth sound box, a demonstration board and a sand tank. The demonstration box is arranged on the bottom plate, the Bluetooth loudspeaker box, the demonstration board and the sand tank are arranged in the demonstration box, color sand is filled in the sand tank, and the demonstration board is horizontally arranged above the Bluetooth loudspeaker box. The top cover of the demonstration box comprises a fixed part and an overturning part, and the bottom surface of the overturning part is provided with a reflector. The center of the bottom surface of the demonstration board is connected with the center of a cone of the Bluetooth sound box. The Bluetooth sound box is in Bluetooth connection with the mobile phone, the mobile phone downloads a sound frequency device APP, the Bluetooth sound box emits sound waves with different frequencies through operation of the mobile phone, and the demonstration board vibrates. According to the utility model, the Bluetooth sound box is controlled by the mobile phone APP to emit sound waves with specific frequency, the frequency is stable, and the experiment effect is good. And after the experiment is finished, the colored sand is conveniently and quickly collected, and the whole experiment device is also easy to move and displace.

Description

Technical Field

[0001] The utility model belongs to the technical field of experimental equipment and relates to a Chladni plate graphic demonstration device. Background Art

[0002] The formation of Chladni patterns involves knowledge of acoustics and vibration. When sound waves propagate through a thin plate, they cause the plate to vibrate. These vibrations propagate through the plate, reflecting and superimposing upon boundaries or obstacles, forming standing waves. Standing waves are waves that are confined to a certain area and do not propagate outward. They are generally formed by the superposition of two waves with the same amplitude and frequency but propagating in opposite directions. In the experiment, a material such as a thin metal plate was evenly sprinkled with fine sand. Vibrations were then generated at the edge of the plate. As the vibration frequency changes, the sand automatically arranges itself into different patterns, forming Chladni patterns and visualizing the sound.

[0003] Chladni patterns are used in electronic signal generators, enabling more precise and adjustable drive. Furthermore, they have had a significant impact on the study of acoustics and the development of art, inspiring new research perspectives and methodologies in fields such as modern physics, physiology and medicine, philosophy, architectural acoustics, music theory, instrument manufacturing, mathematics, and sound flow.

[0004] Existing Chladni plate pattern demonstration devices connect a thin plate to an oscillator, which emits sound waves of varying frequencies, causing the sand grains on the Chladni plate to form distinct patterns. This experimental setup is difficult to disassemble and assemble, and the resulting sand is also difficult to clean. Summary of the Invention

[0005] The purpose of the utility model is to provide a Chladni plate graphic demonstration device in view of the deficiencies in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] Includes Chladni plate device and mobile phone.

[0008] The Chladni plate device includes a base plate, a demonstration box, a Bluetooth speaker, a demonstration board and a sand pot; the base plate is rectangular, and four legs are threadedly connected to the base plate; the demonstration box is placed on the base plate, the Bluetooth speaker, the demonstration board and the sand pot are placed in the demonstration box, the sand pot is filled with colored sand, and the demonstration board is horizontally arranged above the Bluetooth speaker.

[0009] The top cover of the demonstration box includes a fixed part and a flip part. The fixed part and the flip part are connected by a hinge. The fixed part is fixedly arranged, and the flip part can be flipped relative to the fixed part. When the flip part is flipped to a horizontal position, it is fixed to the side wall of the demonstration box by a buckle; a reflector is provided on the bottom surface of the flip part.

[0010] A support block is vertically arranged at the center of the paper cone of the Bluetooth speaker, one end of the support block is bonded to the paper cone, and the other end is bonded to the center of the bottom surface of the demonstration board.

[0011] The Bluetooth speaker is connected to a mobile phone via Bluetooth. The mobile phone has a sound frequency controller APP downloaded thereon. The Bluetooth speaker emits sound waves of different frequencies through the operation of the mobile phone.

[0012] The demonstration board is a circular or regular polygonal metal sheet or foam plastic sheet, and a level bubble is arranged at the center of the top surface of the demonstration board.

[0013] This device is relatively simple in structure and easy to operate, making experimental preparation particularly convenient. Using a mobile phone app to control the Bluetooth speaker to emit sound waves at a specific frequency, the device achieves stable frequencies and excellent experimental results. After the experiment, the colored sand can be collected quickly and easily, and the entire experimental setup is also easy to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 This is a diagram of the operation interface of the mobile phone sound frequency analyzer APP;

[0016] Figure 3 Schematic diagram of the Chladni plate formed on a circular demonstration plate by sound waves of different frequencies;

[0017] Figure 4 Schematic diagram of the Chladni plate formed on the equilateral triangle demonstration plate by sound waves of different frequencies;

[0018] Figure 5 Schematic diagram of the Chladni plate formed on a square demonstration board by sound waves of different frequencies;

[0019] Figure 6 Schematic diagram of the Chladni plate formed by sound waves of different frequencies on a regular hexagonal demonstration plate. DETAILED DESCRIPTION

[0020] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the embodiments and drawings. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] like Figure 1 As shown, a Chladni plate graphic demonstration device includes a Chladni plate device 1 ( Figure 1 device in the dotted box) and mobile phone 2.

[0022] The Chladni plate device 1 comprises a base plate 101, a demonstration box 102, a Bluetooth speaker 103, a demonstration board 104, and a sand pot 105. The base plate 101 is rectangular, with four height-adjustable legs 106 threaded onto it. The demonstration box 102 is placed on the base plate 101, while the Bluetooth speaker 103, demonstration board 104, and sand pot 105 are placed inside the demonstration box 102. The sand pot 105 is filled with colored sand 107, and the demonstration board 104 is positioned horizontally above the Bluetooth speaker 103.

[0023] The top cover of demonstration box 102 includes a fixed portion 108 and a flip portion 109, which are connected by a hinge 110. Fixed portion 108 is fixed, while flip portion 109 can flip relative to fixed portion 108. When flip portion 109 flips to a horizontal position, it is secured to the side wall of demonstration box 102 via a snap, thus sealing the top of demonstration box 102. Flip portion 109 has a handle 111 on its top and a reflector 112 on its bottom.

[0024] The Bluetooth speaker 103 uses an open paper cone 113, that is, there is no protective cover on the outside of the speaker cone. A support block 114 is vertically set in the center of the paper cone 113. One end of the support block 114 is bonded to the paper cone 113, and the other end is bonded to the center of the bottom surface of the demonstration board 104. The Bluetooth speaker 103 is connected to the mobile phone 2 via Bluetooth. The mobile phone 2 has a sound frequency generator app downloaded. By operating the mobile phone, the Bluetooth speaker 103 emits sound waves of different frequencies, such as Figure 2 .

[0025] The demonstration board 104 is a metal sheet or a foam plastic sheet in the shape of a circle or a regular polygon (such as an equilateral triangle, a square, or a regular hexagon). A level bubble 115 is provided at the center of the top surface of the demonstration board 104 .

[0026] During the experiment, first open the flip portion 109 of the top cover and tilt it to approximately 45 degrees. Then, move the Bluetooth speaker 103 connected to the demonstration board 104 horizontally so that the demonstration board 104 is fully visible in the reflector 112. Adjust the height of the four legs 106 so that the bubble in the level bubble 115 is centered, and the demonstration board 104 is now horizontal. Pour the colored sand from the sand pot 105 evenly onto the center of the demonstration board 104. This completes the preparations. Turn on the Bluetooth speaker 103, open the sound frequency analyzer app on your phone, select different sound waves, observe different Chladni plate patterns, and record them. For each experiment, select different sound wave frequencies, and remove the colored sand from the demonstration board 104 and transfer it to the demonstration box 102. After each experiment, replace the demonstration board 104 with another one of a different shape, repeat the preparations, and then repeat the experiment. After the experiment, pour the colored sand from the demonstration box and collect it in the sand pot for the next experiment. After finishing, flip the flip part to the horizontal position, fix it with the buckle, and use the handle to move the experimental device.

[0027] Figure 3 、 4 , 5 and 6 respectively show the experimental results of four sets of Chladni plate patterns using circle, equilateral triangle, square and regular hexagon. (a), (b), (c) and (d) in each figure correspond to sound waves with frequencies of 160Hz, 255Hz, 430Hz and 650Hz, respectively.

[0028] The contents described in the embodiments of this specification are merely an enumeration of the implementation forms of the inventive concept. The protection scope of the present utility model should not be regarded as limited to the specific forms described in the embodiments. The protection scope of the present utility model also extends to equivalent technical means that can be thought of by those skilled in the art based on the inventive concept.

Claims

1. A Chladni plate pattern demonstration device, comprising a Chladni plate device and a mobile phone; characterized in that: The Chladni plate device includes a base plate, a demonstration box, a Bluetooth speaker, a demonstration board, and a sand pot; the base plate is rectangular, and four legs are threadedly connected to the base plate; the demonstration box is placed on the base plate, the Bluetooth speaker, the demonstration board, and the sand pot are placed in the demonstration box, the sand pot is filled with colored sand, and the demonstration board is horizontally arranged above the Bluetooth speaker; The top cover of the demonstration box includes a fixed portion and a flip portion, the fixed portion and the flip portion are connected by a hinge, the fixed portion is fixedly arranged, and the flip portion can be flipped relative to the fixed portion. When the flip portion is flipped to a horizontal position, it is fixed to the side wall of the demonstration box by a buckle; the bottom surface of the flip portion is provided with a reflector; A support block is vertically arranged at the center of the paper cone of the Bluetooth speaker, one end of the support block is bonded to the paper cone, and the other end is bonded to the center of the bottom surface of the demonstration board; The Bluetooth speaker is connected to the mobile phone via Bluetooth. The mobile phone has a sound frequency generator APP downloaded. Through the mobile phone operation, the Bluetooth speaker emits sound waves of different frequencies; The demonstration board is a circular or regular polygonal metal sheet or foam plastic sheet, and a level bubble is arranged at the center of the top surface of the demonstration board.

2. A Chladni plate pattern demonstration device according to claim 1, characterized in that: The top surface of the flip part is provided with a handle.

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