Portable coulomb teaching aid

Abstract

The utility model relates to a portable coulomb teaching aid, which solves the problems that the existing coulomb force experiment prop can not accurately display the coulomb force and is not beneficial to learning and understanding of students due to the fact that the existing coulomb force experiment prop carries out qualitative analysis. The device comprises a long-strip-shaped base, the left end of the base is upwards and vertically provided with a force measuring plate, the right side face of the force measuring plate is provided with a force measuring sensor, the top of the force measuring plate is provided with a connecting plate in a rightward extending mode, the bottom face of the connecting plate is connected with a first small ball through a hanging rod capable of swinging leftwards and rightwards, and the first small ball is attached to the force measuring sensor in the suspended state. A guide rail is arranged on the base in the left-right direction, a sliding block is arranged on the guide rail, a second small ball is connected to the sliding block through a vertical supporting rod, the second small ball and the first small ball are copper-plated light balls with the same shape and shape, and the first small ball, the second small ball and the force measuring sensor are located on the same horizontal line. The teaching aid provided by the utility model can visually observe the relationship between the force and the spacing under the action of the Coulomb force, and helps students to more visually know the Coulomb force.

Description

Technical Field

[0001] This utility model belongs to the field of teaching aids technology, and relates to a classroom experiment demonstration device, particularly a portable coulomb teaching aid. Background Technology

[0002] In teaching Coulomb's law, two electrostatically charged balls are often suspended at an angle to demonstrate the effect of the Coulomb force, amplifying its impact for easier student observation. However, as shown in the experiment above, this only allows for qualitative analysis of the Coulomb force and cannot provide precise measurement. This prevents students from gaining a deeper understanding of Coulomb's law, impacting the quality of subsequent teaching and hindering their observation and learning. Utility Model Content

[0003] This invention addresses the problem that existing Coulomb force experimental props, which rely on qualitative analysis, cannot accurately display the magnitude of the Coulomb force, hindering students' learning and understanding. It provides a portable Coulomb force teaching aid that can intuitively measure and display the magnitude of the Coulomb force, and correlates the spacing between experimental balls with the magnitude of the Coulomb force, helping students to understand the Coulomb force more intuitively.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: a portable coulomb teaching aid, including a long strip-shaped base, a force measuring plate vertically arranged on the left end of the base, a force sensor arranged on the right side of the force measuring plate, a connecting plate protruding to the right from the top of the force measuring plate, and a small ball A connected to the bottom of the connecting plate through a hanging rod that can swing left and right. When the small ball A is suspended, the force sensor is attached to it. A guide rail is arranged on the base along the left and right direction, and a slider is arranged on the guide rail. A small ball B is connected to the slider through a vertical support rod. The small ball B and the small ball A are copper-plated lightweight spheres of the same shape. The small ball A, the small ball B, and the force sensor are on the same horizontal line.

[0005] When using this device, first place it on a horizontal table. Before the experiment, ensure that ball A and the force sensor are in contact, and that the initial reading of the force sensor is 0. Ensure that balls A and B, and the force sensor, are on the same horizontal line. After charging ball A or B with static electricity using the electrostatic generator, bring them into contact so that their capacitance and charge are equal. Control the distance between balls A and B at L1 and record the force data as F1; then adjust the distance to L2 and record the force data as F2. Next, move ball B away from the force plate and have ball C contact ball A to redistribute the charge equally. Control the distance between the two balls at L3 and record the force data as F3; then adjust the distance to L4 and record the force data as F4. According to Coulomb's law... We can conclude that ; This experiment can verify Coulomb's law. By varying the amount of charge and by continuously changing the charge of ball A or ball B using ball C, the relationship between the charges can be expanded, allowing for repeated experiments and greater precision.

[0006] Preferably, it also includes a freely placed small ball C, which is a copper-plated lightweight sphere with the same shape as the small ball A.

[0007] Preferably, a zero-adjustment slide rail is provided at the center of the bottom surface of the connecting plate along the left-right direction, and the upper end of the boom is slidably mounted on the zero-adjustment slide rail. The upper end of the boom can move along the zero-adjustment slide rail, thereby adjusting the small ball to fit precisely against the force sensor.

[0008] Preferably, the force measuring plate or the connecting plate is provided with a display screen for displaying force sensor data on its front or rear side.

[0009] Preferably, the base has scale values ​​marked on one side of the slide rail.

[0010] This invention allows for the quantitative measurement of the distance and interaction force between a pair of charged spherical capacitors, enabling a direct observation of the Coulomb force and helping trainees gain a more intuitive understanding of it. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings.

[0012] Figure 1 This is a three-dimensional structural schematic diagram of this utility model.

[0013] Figure 2 This is a schematic diagram of a small sphere structure according to the present invention.

[0014] Figure 3 This is a side view of the main structure of this utility model.

[0015] In the diagram: 1. Base, 2. Guide rail, 3. Force measuring plate, 4. Force sensor, 5. Display screen, 6. Connecting plate, 7. Hanging rod, 8. Small ball A, 9. Small ball B, 10. Support rod, 11. Slider, 12. Small ball C, 13. Zeroing slide rail. Detailed Implementation

[0016] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0017] Example: A portable coulomb teaching aid, such as Figure 1 , 3As shown. This device includes a long, narrow base 1. A force-measuring plate 3 is vertically mounted on the left end of the base 1, and a force sensor 4 is mounted on the right side of the force-measuring plate 3. A display screen 5 is mounted on the front side of the force-measuring plate 3 to display the data from the force sensor 4. A connecting plate 5 protrudes to the right from the top of the force-measuring plate 3, and a small ball 8 is connected to the bottom of the connecting plate via a swingable rod 7. Figure 3 As shown, a zero-adjustment slide rail 13 is provided at the center of the bottom surface of the connecting plate 5 along the left-right direction, and the upper end of the suspension rod 7 is slidably mounted on the zero-adjustment slide rail 13. At the start of the test, the position of the suspension rod 7 on the zero-adjustment slide rail 13 is adjusted so that the force sensor 4 is attached when the small ball A 8 is naturally suspended. A guide rail 2 is provided on the base 1 along the left-right direction, and the base has a scale value marked on one side of the slide rail. A slider 11 is provided on the guide rail, and a small ball B 9 is connected to the slider through a vertical support rod 10. The small ball A 8, the small ball B 9, and the force sensor 4 are on the same horizontal line.

[0018] like Figure 2 As shown, the device also includes an independently mounted small ball C 12, which has an insulated handle. Small balls C 13, B 9, and A 8 are all identical lightweight copper-plated spheres. The interiors of small balls C 13, B 9, and A 8 can be insulated plastic balls with a copper-plated layer on their surfaces. The hanging rod 7 of small ball A 8 and the support rod 10 of small ball B 9 are also insulated rods.

[0019] When using this device, first place it on a horizontal table. Before the experiment, ensure that ball A and the force sensor are in contact, and that the initial reading of the force sensor is 0. Ensure that balls A and B, and the force sensor, are on the same horizontal line. After charging ball A or B with static electricity using the electrostatic generator, bring them into contact so that their capacitance and charge are equal. Control the distance between balls A and B at L1 and record the force data as F1; then adjust the distance to L2 and record the force data as F2. Next, move ball B away from the force plate and have ball C contact ball A to redistribute the charge equally. Control the distance between the two balls at L3 and record the force data as F3; then adjust the distance to L4 and record the force data as F4. According to Coulomb's law... We can conclude that ; This experiment can verify Coulomb's law. By varying the amount of charge and by continuously changing the charge of ball A or ball B using ball C, the relationship between the charges can be expanded, allowing for repeated experiments and greater precision.

Claims

1. A portable coulomb demonstrator, characterized by: The application relates to a force sensor device, which comprises a long strip-shaped base, a force plate vertically arranged at the left end of the base, a force sensor arranged on the right side of the force plate, a connecting plate arranged on the top of the force plate and protruding to the right, a ball A connected to the bottom of the connecting plate through a left-right swingable suspender, the ball A being attached to the force sensor in a suspended state, guide rails arranged on the base along the left-right direction, a sliding block arranged on the guide rails, a ball B connected to the sliding block through a vertical supporting rod, the ball B being a copper-plated light ball body with the same shape as the ball A, the ball A, the ball B and the force sensor being arranged on the same horizontal line.

2. A portable Coulomb's law teaching aid according to claim 1, wherein: The application further comprises a ball C which is independently and freely placed, and is a copper-plated light ball body with the same shape as the ball A.

3. The portable Coulomb's law teaching aid of claim 1, wherein: A zero-adjusting sliding rail is arranged on the bottom center of the connecting plate along the left-right direction, and the upper end of the suspender is slidingly arranged on the zero-adjusting sliding rail.

4. The portable Coulomb's law teaching aid of claim 1, wherein: A display screen for displaying the data of the force sensor is arranged on the front side or the rear side of the force plate or the connecting plate.

5. The portable Coulomb's law teaching aid of claim 1, wherein: A scale value is marked on one side of the base.

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