A visual display device for electric field lines of a hollow metal sphere

Abstract

The present invention is a device for visualizing electric field lines of hollow metal spheres, comprising: a charge generating device, provided with at least two, for generating positive and negative charges; a hollow metal sphere, arranged in correspondence with the charge generating device, for collecting the charges generated by the charge generating device and generating an electric field; a ribbon, arranged on the surface of the hollow metal sphere, which floats along the electric field lines when charged, for displaying the electric field lines; and a translation device, for adjusting the distance between the hollow metal spheres. The advantages of the present invention are: the ribbon can intuitively and three-dimensionally display the distribution of the electric field, verifying physical theoretical models; the distance between the hollow metal spheres, the charge amount, and the polarity can be adjusted to achieve a visual display of the coupled electric field under different parameters; the charge is generated by the principle of triboelectric generation, and the interaction between the charges is used to make the hollow metal sphere carry the charge, which can deepen students' understanding of triboelectric generation and the interaction between charges.

Description

Technical Field

[0001] The invention relates to the field of physical experimental devices, in particular to a hollow metal sphere electric field line visualization display device. Background Art

[0002] The electric field is an essential component of physics, yet it's also a relatively abstract concept. Unlike physical objects, while the electric field exists objectively, it cannot be directly observed. Therefore, when teaching, teachers can only use drawing electric field lines or animations to help students understand the electric field. However, these drawings and animations often depict the distribution of electric field lines on a two-dimensional plane, failing to fully demonstrate the spatial distribution of electric field lines or specifically illustrate the effects of voltage, distance, and other factors on the state of the field lines. Summary of the Invention

[0003] The present invention mainly solves the above problems and provides a hollow metal sphere electric field line visualization display device that can show the influence of pole spacing, polarity and charge on the distribution of electric field lines and the distribution of electric field lines under multiple electrodes.

[0004] The technical solution adopted by the present invention to solve the technical problem is a hollow metal sphere electric field line visualization display device, comprising:

[0005] There are at least two charge generating devices for generating positive and negative charges;

[0006] a hollow metal sphere, arranged corresponding to the charge generating device, for collecting the charges generated by the charge generating device and generating an electric field;

[0007] The ribbon is placed on the surface of the hollow metal sphere and floats along the electric field lines when charged, which is used to display the electric field lines;

[0008] The translation device is used to adjust the distance between each hollow metal sphere.

[0009] As a preferred embodiment of the above scheme, the charge generating device includes a driving mechanism, an upper friction tube, a lower friction tube, a charge transmission belt and a first brush. The charge transmission belt is arranged on the upper friction tube and the lower friction tube. The driving mechanism drives the lower friction tube to rotate, and the lower friction tube drives the charge transmission belt to rotate, so that the charge transmission belt and the upper friction tube and the lower friction tube are frictionally charged. One end of the first brush is grounded, and the other end is in contact with the charge transmission belt located at the lower friction tube.

[0010] As a preferred solution of the above solution, a second brush is provided on the hollow metal sphere, and the second brush is in contact with the charge transfer belt near the upper friction tube.

[0011] As a preferred embodiment of the above scheme, the driving mechanism includes a motor, a driving wheel, a driven wheel and a motor driving module for controlling the direction and speed of the motor. The driving wheel is arranged on the output shaft of the motor, the driving wheel drives the driven wheel to rotate, and the driven wheel drives the lower friction tube to rotate.

[0012] As a preferred embodiment of the above scheme, the upper friction tube is fixedly arranged between the first vertical plate and the second vertical plate, a rotating shaft is further provided between the first vertical plate and the second vertical plate, the lower friction tube is fixedly arranged on the rotating shaft, and anti-slip edges are provided at both ends of the lower friction tube.

[0013] As a preferred solution of the above solution, the translation mechanism includes a translation motor and a support plate, the hollow metal sphere is arranged on the support plate, and the translation motor controls the translation of the support plate.

[0014] As a preferred embodiment of the above scheme, it includes a substrate and a transparent cover, wherein the transparent cover and the substrate form a closed space, and the charge generating device, the hollow metal sphere and the translation device are all arranged on the substrate corresponding to the closed space.

[0015] As a preferred solution of the above solution, a drying device is provided on the substrate corresponding to the enclosed space.

[0016] As a preferred solution of the above solution, an extension interface is provided on the substrate, and the translation device and the charge generating device are controlled through the extension interface.

[0017] The advantages of the present invention are: it can intuitively and three-dimensionally display the distribution of the electric field through the ribbon to verify the physical theoretical model; it can adjust the distance, charge amount and polarity between the hollow metal spheres to achieve a visual display of the coupled electric field under different parameters; it generates charges through the principle of triboelectric charging, and uses the force between charges to make the hollow metal spheres carry charges, which can deepen students' understanding of triboelectric charging and the force between charges. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the hollow metal sphere electric field line visualization display device in Example 1.

[0019] Figure 2 Schematic diagram of the structure of the electrode unit in Example 1.

[0020] 1- hollow metal sphere 2- base plate 3- drying device 4- upper friction tube 5- lower friction tube 6- charge transfer belt 7- first brush 8- first vertical plate 9- second vertical plate 10- rotating shaft 11- driving pulley 12- driven pulley 13- support plate 14- second brush. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be further described below with reference to embodiments and in conjunction with the accompanying drawings.

[0022] Example 1:

[0023] This embodiment is a hollow metal sphere electric field line visualization display device, such as Figure 1 As shown, the device includes a charge generator, a hollow metal sphere 1, a ribbon, a translation device, a substrate 2, a transparent cover, a drying device 3, and an expansion interface. The hollow metal sphere 1 is mounted on the translation device, the ribbons are distributed on the surface of the hollow metal sphere 1, and the charge generator, translation device, drying device, and expansion interface are all mounted on the substrate. The transparent cover and the substrate form a confined space, and the charge generator, hollow metal sphere, and translation device are all located on the substrate corresponding to the confined space.

[0024] In this embodiment, two charge generating devices are provided, and correspondingly, two translation devices and two hollow metal spheres are also provided. One charge generating device, one translation device and one hollow metal sphere constitute an electrode unit. The two electrode units are arranged in mirror symmetry, and the ribbon is made of nylon, paper, glass fiber or cotton.

[0025] The charge generating device includes a drive mechanism, an upper friction tube 4, a lower friction tube 5, a charge transfer belt 6, a first brush 7, a first riser 8, a second riser 9, and a rotating shaft 10. Taking the left electrode unit as an example, the upper friction tube 4 is fixed between the first and second risers 8 and 9, positioned horizontally and perpendicularly to them. It is located above the right side of the first and second risers 8 and 9. The rotating shaft 10 is also positioned between the first and second risers 8 and 9, parallel to the first friction tube 4, and located below the left side of the first and second risers 8 and 9. The lower friction tube 5 is fixed to the rotating shaft 10 and rotates with it. The charge transfer belt 6 is positioned between the upper and lower friction tubes 4 and 5. The lower friction tube 5 has anti-slip edges on both sides to prevent the charge transfer belt from falling off. One end of the first brush 7 is grounded, and the other end contacts the charge transfer belt located on the lower friction tube. The driving mechanism includes an electromechanical system, a driving wheel 11, a driven wheel 12 and a motor drive module for controlling the direction and speed of the motor. The driving wheel 11 is set on the motor output shaft, and the driving wheel drives the driven wheel to rotate through a belt. The driven wheel is fixed on the rotating shaft 10, and the driven wheel drives the lower friction tube to rotate through the rotating shaft.

[0026] The translation mechanism includes a translation motor and a support plate 13. The support plate 13 consists of two vertical plates and a horizontal plate. The two vertical plates are arranged on both sides of the charge generator and are higher than the first and second vertical plates in the charge generator. The horizontal plate is arranged above the two vertical plates. The hollow metal sphere is arranged on the horizontal upper surface. The translation motor is used to control the translation of the support plate. In this embodiment, the translation of the support plate is achieved by a slide rail.

[0027] A second brush 14 is also provided on the hollow metal sphere, and the second brush is in contact with the charge transfer belt near the upper friction tube.

[0028] In this embodiment, the upper friction tube and the lower friction tube are PVC tubes with rough surfaces, the charge transmission belt is made of nylon material, the drying device is used to keep the enclosed space formed by the transparent cover and the substrate dry, and the expansion interface is used to connect to a computer so that the computer can control the translation shaft and the charge generating device.

[0029] When the charge generating device is in operation, Figure 2 As shown, taking the electrode unit on the right as an example, assuming that the counterclockwise rotation of the charge transfer belt 7 is positive rotation, when the drive mechanism drives the charge transfer belt to rotate forward, the lower friction tube 5 and the charge transfer belt generate friction electricity, generating negative charges on the lower friction tube and positive charges inside the charge transfer belt. As the charge transfer belt rotates, negative charges continue to accumulate on the lower friction tube, causing the electrons at the contact end of the first brush 7 and the charge transfer belt to be repelled. Ultimately, the contact end of the first brush 7 and the charge transfer belt is positively charged. These positive charges enter the hollow metal sphere through the second brush 14 as the charge transfer belt rotates, making the hollow metal sphere positively charged. When the charge transfer belt rotates forward, it first passes through the second brush and then the upper friction tube, so the positive charges can enter the hollow metal sphere without being absorbed by the upper friction tube.

[0030] When the charge transfer belt reverses, negative charge continuously accumulates on the upper friction tube 7, while the positive charge on the charge transfer belt is evenly distributed on the inner side of the charge transfer belt. Therefore, when the inner side of the charge transfer belt leaves the upper friction tube, it will carry a certain amount of negative charge. When passing through the second brush, the electrons at the contact point between the second brush and the charge transfer belt are repelled, thereby making the hollow metal sphere negatively charged.

[0031] When the hollow metal sphere is charged, the ribbon on the hollow metal sphere will also carry a corresponding charge. Under the influence of the electric field generated by the hollow metal sphere, the ribbon will float along the electric field lines, realizing a visual display of the electric field lines.

[0032] In this embodiment, the charge carried by the hollow metal spheres can be increased and controlled by extending the rotation time of the charge transfer belt. The accumulation rate of charge in the hollow metal spheres can be increased by increasing the rotation speed of the charge transfer belt. The distance between the two hollow metal spheres, i.e., the pole pitch, can be changed by the translation mechanism.

[0033] Example 2:

[0034] This embodiment is a hollow metal sphere electric field line visualization display device. The difference from Example 1 is that this embodiment is provided with three electrode units, namely, three charge generating devices, three translation devices and three hollow metal spheres. The three electrode units are distributed in a ring shape, and any two adjacent motor units are at an angle of 120 degrees, which can display the electric field line distribution when multiple electrodes are used.

[0035] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. A hollow metal sphere electric field line visualization display device, characterized by: include: There are at least two charge generating devices for generating positive and negative charges; a hollow metal sphere, arranged corresponding to the charge generating device, for collecting the charges generated by the charge generating device and generating an electric field; The ribbon is placed on the surface of the hollow metal sphere and floats along the electric field lines when charged, which is used to display the electric field lines; A translation device for adjusting the distance between the hollow metal spheres; The charge generating device includes a drive mechanism, an upper friction tube, a lower friction tube, a charge transmission belt, a first brush, a first riser, a second riser, and a rotating shaft. In one of the charge generating devices, the upper friction tube is fixed between the first riser and the second riser, and is arranged horizontally and perpendicularly to the first riser and the second riser. The upper friction tube is located at the upper right side of the first riser and the second riser. The other charge generating device is arranged symmetrically with the above charge generating device. The rotating shaft is arranged between the first vertical plate and the second vertical plate, the rotating shaft is parallel to the first friction tube, and the rotating shaft is located at the lower left side of the first vertical plate and the second vertical plate. The lower friction tube is fixed on the rotating shaft and rotates as the rotating shaft rotates; The charge transmission belt is arranged between the upper friction tube and the lower friction tube, and anti-slip edges are provided on both sides of the lower friction tube to prevent the charge transmission belt from falling off; One end of the first brush is grounded, and the other end is in contact with the charge transfer belt located at the lower friction tube; The driving mechanism includes an electromechanical system, a driving wheel, a driven wheel, and a motor drive module for controlling the direction and speed of the motor. The driving wheel is arranged on the output shaft of the motor, and the driving wheel drives the driven wheel to rotate through a belt. The driven wheel is fixed on the rotating shaft, and the driven wheel drives the lower friction tube to rotate through the rotating shaft. A second brush is also provided on the hollow metal sphere, and the second brush contacts the charge transmission belt near the upper friction tube.

2. The hollow metal sphere electric field line visualization display device according to claim 1, characterized in that: The translation device includes a translation motor and a support plate. The hollow metal sphere is arranged on the support plate. The translation motor controls the translation of the support plate.

3. The hollow metal sphere electric field line visualization display device according to claim 1, characterized in that: It includes a substrate and a transparent cover, wherein the transparent cover and the substrate form a closed space, and the charge generating device, the hollow metal sphere and the translation device are all arranged on the substrate corresponding to the closed space.

4. The hollow metal sphere electric field line visualization display device according to claim 3, characterized in that: A drying device is provided on the substrate corresponding to the enclosed space.

5. The hollow metal sphere electric field line visualization display device according to claim 3, characterized in that: An extension interface is provided on the substrate, and the translation device and the charge generating device are controlled through the extension interface.

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