Electromagnetic damping demonstrator

Abstract

The utility model discloses an electromagnetic damping demonstrator, which comprises a base, a fixed bracket, a cross beam, a release device, a plurality of damping pendulums and a magnet, the fixed bracket is fixed on the base; the cross beam is fixed at one end, far away from the base, of the fixed bracket; the plurality of damping pendulums are rotatably arranged on the cross beam; the releasing device penetrates through holes reserved in the fixing support so as to limit or release the multiple damping pendulums. And the magnets are positioned on the base and between the adjacent damping pendulums. According to the utility model, the releasing device and the plurality of damping pendulums are arranged, the plurality of damping pendulums can be released at the same time through the releasing device to demonstrate the damping motion of different damping pendulums in the same magnetic field, and compared with a traditional demonstrator, the demonstrator is more visual.

Description

Technical Field

[0001] The utility model relates to the field of physical experiments, in particular to teaching aids for physical experiments. Background Art

[0002] An electromagnetic damping demonstrator is an experimental device used to demonstrate the principle of electromagnetic damping, and its applications are mainly reflected in many aspects such as education and scientific research. In a physics classroom, an electromagnetic damping demonstrator is an indispensable teaching tool. Through intuitive demonstrations, students can deeply understand physical concepts such as electromagnetic induction, the interaction between magnetic fields and currents, and enhance their understanding and recognition of the principle of electromagnetic damping.

[0003] Most of the existing electromagnetic damping demonstrators mainly have the structure of a single damping pendulum. During the demonstration, it is necessary to repeatedly disassemble the damping pendulum many times to demonstrate the damping motion of different damping pendulums in the same magnetic field. The operation is relatively cumbersome, and it is necessary to compare separately, which is not intuitive. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an electromagnetic damping demonstrator, which can, on the basis of the traditional damping demonstrator, increase multiple damping pendulums and a simultaneous release function, so that the operation is relatively simple and the demonstration effect is more obvious.

[0005] To solve the above technical problems, the utility model provides an electromagnetic damping demonstrator, including: an electromagnetic damping demonstrator, characterized by including: a base, a fixed bracket, a cross beam, a release device, multiple damping pendulums and a magnet;

[0006] The fixed bracket is fixed on the base;

[0007] The cross beam is fixed at one end of the fixed bracket away from the base;

[0008] The multiple damping pendulums are rotatably arranged on the cross beam;

[0009] The release device passes through a reserved hole on the fixed bracket to limit or release the multiple damping pendulums;

[0010] The magnet is located on the base, between adjacent damping pendulums.

[0011] Further, the multiple damping pendulums include: a strong damping pendulum, a medium damping pendulum and a weak damping pendulum;

[0012] The medium damping pendulum is located in the middle of the cross beam;

[0013] The strong damping pendulum and the weak damping pendulum are located on both sides of the medium damping pendulum.

[0014] Specifically, holes are reserved on the damping pendulum, and the cross beam passes through the holes reserved on the strong damping pendulum, the medium damping pendulum and the weak damping pendulum, so that the strong damping pendulum, the medium damping pendulum and the weak damping pendulum can make a certain range of circular motion around the cross beam as the axis.

[0015] Specifically, nylon rings are arranged on the cross beam, and the nylon rings are arranged in pairs at both ends of the fixed parts of the strong damping pendulum, the medium damping pendulum and the weak damping pendulum and the cross beam, so as to limit each damping pendulum.

[0016] Specifically, a convex fixing point is arranged on the outer edge of the fixed end of each damping pendulum and the cross beam, and the fixing point is located on the non-axis of each damping pendulum for cooperation with the damping pendulum release device above the cross beam.

[0017] Specifically, the end of the strong damping pendulum far from the connecting part is not combed;

[0018] The end of the medium damping pendulum far from the connecting part is provided with relatively sparse comb teeth;

[0019] The end of the weak damping pendulum far from the connecting part is provided with relatively dense comb teeth.

[0020] Specifically, the strong damping pendulum, the medium damping pendulum and the weak damping pendulum are all made of aluminum plate, and the thickness range is 1mm - 3mm. In this case, 1.5mm is taken.

[0021] Further, the magnet is detachably fixed on the magnet fixing device, and the magnet fixing device is detachably fixed between the connecting ends of the fixed brackets on the base.

[0022] Further, the fixed brackets are arranged in pairs, and the holes through which the release device passes are located at the end of the fixed brackets away from the base where the cross beam is fixed.

[0023] Compared with the prior art, the utility model has at least the following beneficial effects:

[0024] The utility model is provided with a release device and a plurality of damping pendulums. Through the release device, a plurality of damping pendulums can be released simultaneously to demonstrate the damping motion of different damping pendulums in the same magnetic field. The magnet is detachably fixed on the fixing device, and the position and quantity of the magnet can be adjusted according to the actual needs of the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the electromagnetic damping demonstrator of the utility model;

[0026] Figure 2 is a front view of the structure of the electromagnetic damping demonstrator of the utility model;

[0027] Figure 3 Schematic diagram of the magnet fixing device of the electromagnetic damping demonstrator of the present utility model;

[0028] Figure 4 Schematic diagram of the damping pendulum in the electromagnetic damping demonstrator of the present utility model;

[0029] Figure 5 Schematic diagram of the weak damping pendulum of the electromagnetic damping demonstrator of the present utility model;

[0030] Figure 6 Schematic diagram of the strong damping pendulum of the electromagnetic damping demonstrator of the present utility model. Detailed implementation manners

[0031] The electromagnetic damping demonstrator of the present utility model will be described in more detail below with reference to the schematic diagrams, in which the preferred embodiments of the present utility model are shown. It should be understood that those skilled in the art can modify the present utility model described herein while still achieving the advantageous effects of the present utility model. Therefore, the following description should be understood as a broad guidance for those skilled in the art and not as a limitation to the present utility model.

[0032] In the following paragraphs, the present utility model will be described more specifically by way of example with reference to the accompanying drawings. The advantages and features of the present utility model will be clearer according to the following description and the claims. It should be noted that the drawings are all in a very simplified form and use non-precise scales, only for the purpose of conveniently and clearly assisting in explaining the purpose of the embodiments of the present utility model.

[0033] As Figure 1 and Figure 2 shown, an embodiment of the present utility model provides a novel electromagnetic damping demonstrator, including: a base 1, a fixing bracket 2, a cross beam 3, a release device 4, a plurality of damping pendulums, and a magnet 9;

[0034] The fixing bracket 2 is fixed on the base 1;

[0035] The cross beam 3 is fixed at one end of the fixing bracket 2 away from the base 1;

[0036] The plurality of damping pendulums are rotatably arranged on the cross beam 3;

[0037] The release device 4 passes through the holes reserved on the fixing bracket 2 to limit or release the plurality of damping pendulums;

[0038] The magnet 9 is located on the base, between adjacent damping pendulums.

[0039] In the present utility model, the damping pendulum, for example, includes a medium damping pendulum 5, a strong damping pendulum 7, and a weak damping pendulum 6. The medium damping pendulum 5 is located in the middle of the cross beam 3; the strong damping pendulum 7 and the weak damping pendulum 6 are located on both sides of the medium damping pendulum 5.

[0040] Among them, holes are reserved on the damping pendulum, and the cross beam 3 passes through the holes reserved on the strong damping pendulum 7, the medium damping pendulum 5, and the weak damping pendulum 6, so that the strong damping pendulum 7, the medium damping pendulum 5, and the weak damping pendulum 6 can make a certain range of circular motion with the cross beam 3 as the axis. And the strong damping pendulum 7, the medium damping pendulum 5, and the weak damping pendulum 6 are limited by nylon rings 10.

[0041] Further, the nylon rings 10 are fixedly paired on both sides of the strong damping pendulum 7, the medium damping pendulum 5, and the weak damping pendulum 6.

[0042] Further, the strong damping pendulum 7, the medium damping pendulum 5, and the weak damping pendulum 6 are all made of aluminum plate, and the thickness range is 1 mm - 3 mm.

[0043] In a specific example, the three damping pendulums are cut from 1.5 mm aluminum plates. Due to the good electrical conductivity and relatively light weight of aluminum, when the damping pendulum made of aluminum passes through the magnetic field, a more obvious damping effect will be generated, making the attenuation process of the swing more intuitive and easy to observe.

[0044] As Figure 4 shown, one end of the medium damping pendulum 5 far from the connecting part is provided with relatively sparse comb teeth, and the outer edge of the connecting part is provided with a raised fixing point, and the fixing point is located on the non-central axis of the medium damping pendulum 5.

[0045] As Figure 5 shown, one end of the weak damping pendulum 6 far from the connecting part is provided with relatively dense comb teeth, and the outer edge of the connecting part is provided with a raised fixing point, and the fixing point is located on the non-central axis of the weak damping pendulum 6.

[0046] As Figure 6 shown, one end of the strong damping pendulum 7 far from the connecting part is not provided with comb teeth, and the outer edge of the connecting part is provided with a raised fixing point, and the fixing point is located on the non-central axis of the strong damping pendulum 7.

[0047] Among them, the fixing points provided on the outer edge of the upper end of each damping pendulum are used to cooperate with the damping pendulum release device 4 above the cross beam for experiments.

[0048] Further, a magnet fixing device 8 is provided at the middle position between the bracket 2 and the base 1, as Figure 3As shown in the figure, there are four holes 11 for placing magnets 9 on the magnet fixing device 8. The magnets 9 are inserted into the holes 11 in the direction corresponding to the positive and negative poles and are detachably fixed within the magnet fixing device 8. The magnets 9 are detachably fixed between the connecting ends of the fixing brackets 2 on the base 1 through the magnet fixing device 8.

[0049] In the embodiment of the present utility model, combs with different densities are provided on different damping pendulums. The design of the combs increases the generation of eddy currents, thus correspondingly enhancing the interaction between the eddy current magnetic field and the original magnetic field, and further increasing the damping force. According to Lenz's law, the magnetic field of the eddy current will interact with the original magnetic field, and this interaction will impede the movement of the pendulum bob, thereby generating a damping force. This increased damping force helps to more quickly slow down the movement of the pendulum bob and make it stop more quickly.

[0050] Specifically, during the experiment, after all the damping pendulums are pulled up in the same plane, the fixing points will be blocked by the release device 4, so that all the damping pendulums are fixed. Then, along the reserved holes on the fixing bracket 2, when the release device 4 is lifted, the blocking of the release device 4 on the fixing points of the damping pendulums disappears, so that the fixed damping pendulums are simultaneously released under the action of gravity and cut the magnetic field between the magnets 9. By observing each damping pendulum, the damping motion of different damping pendulums in the same magnetic field can be verified.

[0051] After the magnet fixing device 8 is removed, repeating the above steps can verify the swinging situation of the damping pendulum in the absence of a magnetic field.

[0052] Obviously, those skilled in the art can make various changes and modifications to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and its equivalent technologies, the present utility model is also intended to include these modifications and variations.

Claims

1. An electromagnetic damping demonstrator, characterized in that: include: Base, fixing bracket, crossbeam, release device, multiple damping pendulums and magnets; The fixing bracket is fixed on the base; The crossbeam is fixed to one end of the fixing bracket away from the base; The plurality of damping pendulums are rotatably arranged on the crossbeam; The release device passes through the hole reserved on the fixing bracket to limit or release the multiple damping pendulums; The magnet is located on the base and between adjacent damping pendulums.

2. The electromagnetic damping demonstrator as claimed in claim 1, characterized in that: The plurality of damping pendulums include: a strong damping pendulum, a medium damping pendulum and a weak damping pendulum; The middle damping pendulum is located in the middle of the beam; The strong damping pendulum and the weak damping pendulum are located on both sides of the medium damping pendulum.

3. The electromagnetic damping demonstrator as claimed in claim 2, characterized in that: The damping pendulum is provided with a hole, and the crossbeam passes through the holes reserved on the strong damping pendulum, the medium damping pendulum and the weak damping pendulum, so that the strong damping pendulum, the medium damping pendulum and the weak damping pendulum swing with the crossbeam as the axis.

4. The electromagnetic damping demonstrator as claimed in claim 2, characterized in that: The crossbeam is provided with nylon rings, and the nylon rings are arranged in pairs at the two ends of the fixing parts of the strong damping pendulum, the medium damping pendulum and the weak damping pendulum to the crossbeam, so as to limit the position of each damping pendulum.

5. The electromagnetic damping demonstrator as claimed in claim 2, characterized in that: A protruding fixing point is arranged on the outer edge of each damping pendulum and the fixed end of the cross beam, and the fixing point is located on the non-central axis of each damping pendulum.

6. The electromagnetic damping demonstrator as claimed in claim 2, characterized in that: The end of the strong damping pendulum away from the connecting portion has no comb teeth; The middle damping pendulum has relatively sparse comb teeth at one end away from the connecting portion; The end of the weak damping pendulum away from the connecting portion is provided with relatively dense comb teeth.

7. The electromagnetic damping demonstrator as claimed in claim 2, characterized in that: The strong damping pendulum, the medium damping pendulum and the weak damping pendulum are all made of aluminum plates with a thickness ranging from 1mm to 3mm.

8. The electromagnetic damping demonstrator according to claim 1, characterized in that: The magnet is detachably fixed on the magnet fixing device, and the magnet fixing device is detachably fixed between the connecting ends of the two fixing brackets on the base.

9. The electromagnetic damping demonstrator according to claim 1, characterized in that: The fixing brackets are arranged in pairs, and the hole through which the release device passes is located at an end of the fixing bracket away from the base at the fixing point of the beam.

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