Tuning fork for observing magnetic field

Abstract

The tuning fork for observing the magnetic field comprises a tuning fork body, an assembly and a magnet, the tuning fork body comprises a fork handle and two vibration arms connected with the fork handle, the front ends of the vibration arms are fixedly connected with the fork handle, and the tail ends of the vibration arms are provided with first grooves used for inserting the magnet or the assembly. The lower end of the assembly is inserted into the first groove at the tail end of the vibrating arm, and the top of the assembly is provided with a second groove for inserting a magnet. The tuning fork for observing the magnetic field has the following advantages: (1) the vibrating arm of the tuning fork can be provided with a magnet and also can be provided with an assembly with the magnet, and the installation mode is simple and easy to operate; (2) by knocking the tuning fork, the influence of the magnetic field on the tuning fork can be found according to the vibration time of the tuning fork and a spectrogram, which is intuitive and easy to understand; and (3) a vibration magnetic field with the same vibration frequency as the tuning fork can be provided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tuning fork, especially a tuning fork for observing magnetic field. BACKGROUND

[0002] The tuning fork is a kind of experimental equipment commonly used in physics, which is a steel or aluminum alloy sound generator in the shape of "Y", and can generate mechanical waves of single wavelength. Different tuning forks can emit pure tones of different wavelengths due to their different sizes and lengths of prongs. The longer the prong, the higher the tuning fork, and the longer the wavelength, the lower the tone. The shorter the prong, the shorter the wavelength, and the higher the tone. In physics teaching, the tuning fork can be used to demonstrate the properties of mechanical waves. By tapping the tuning fork, the wave spectrum graph can be collected. It is found that: when the tuning fork is tapped lightly, the amplitude of the tuning fork is small, and the amplitude of the wave spectrum graph is small. At this time, the sound emitted by the tuning fork is also small. When the tuning fork is tapped heavily, the amplitude of the tuning fork is large, and the amplitude of the wave spectrum graph is large. At this time, the sound emitted by the tuning fork is also large. It shows that the loudness of mechanical waves is related to the amplitude of the mechanical waves of the tuning fork. The larger the amplitude, the louder the sound; the smaller the amplitude, the smaller the sound.

[0003] Magnetic field refers to the field that transmits the magnetic force between objects. Magnetic field is composed of moving particles, which cannot be seen or touched under existing conditions. Magnetic field has the radiation characteristics of particles. There is a magnetic field around the magnet, and the interaction between magnets is mediated by the magnetic field, so two magnets can act without physical contact.

[0004] When demonstrating the magnetic field, the influence of the magnetic field on the mechanical waves of the tuning fork can be observed. CONTENT OF THE UTILITY MODEL

[0005] The utility model provides a kind of tuning fork for observing magnetic field, solve the problem of observing magnetic field effect by using the tuning fork installed with magnet, and its technical scheme is as follows:

[0006] A kind of tuning fork for observing magnetic field, including tuning fork body, component and magnet, the tuning fork body includes prong handle and the two vibration arms connected with it, the front end of the vibration arm is fixedly connected with prong handle, and the tail end is provided with first recess for inserting magnet or component, the lower end of the component is used for inserting the first recess in the tail end of vibration arm, and the top is provided with second recess for inserting magnet.

[0007] The side of the component is provided with third recess for inserting magnet.

[0008] The side of the component is provided with through hole for inserting magnet.

[0009] The shape and size of the first recess and the second recess are the same, and the magnet can be installed on the tuning fork body or installed on the tuning fork body through the component.

[0010] The first groove is circular or a regular polygon, and the lower cross section of the component is also circular or a regular polygon.

[0011] The end side of the vibrating arm is provided with a fourth groove, which replaces the second groove of the component.

[0012] The component is made of the same material as the vibrating arm.

[0013] It also includes a block with the same mass as the magnet and the same material as the vibrating arm, which can be installed in the first groove or the second groove.

[0014] The component includes an upper rod and a lower rod, and the cross-section of the upper rod and the cross-section of the vibrating arm have the same shape.

[0015] The first groove is provided with an internal thread, and the lower rod is provided with an external thread, which engages with the first groove through the thread.

[0016] The tuning fork for observing magnetic fields has better portability and installation through its detachable component structure design. The present invention has the following advantages: (1) The vibrating arm of the tuning fork can be fitted with a magnet or a component with a magnet, and the installation method is simple and easy to operate; (2) By striking the tuning fork, the influence of the magnetic field on the tuning fork can be found according to the vibration time and the spectrum diagram, which is intuitive and easy to understand; (3) It can provide a magnetic field with the same vibration frequency as the tuning fork. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the tuning fork used for observing magnetic fields in Example 1;

[0018] Figure 2 This is a schematic diagram of the structure of the tuning fork used for observing the magnetic field in Example 2;

[0019] Figure 3 This is a schematic diagram of the component structure in Embodiment 3;

[0020] Figure 4 This is a schematic diagram of the component structure of Embodiment 4. Detailed Implementation

[0021] like Figure 1 As shown, the tuning fork for observing the magnetic field includes a tuning fork body, a component 3, and a magnet 4. The tuning fork body includes a fork handle 1 and two vibrating arms 2 connected thereto. The front end of the vibrating arm 2 is fixedly connected to the fork handle 1, and the end is provided with a first groove for inserting the magnet 4 or the component 3. The lower end of the component 3 is used to insert into the first groove at the end of the vibrating arm, and the top of the component 3 is provided with a second groove for inserting the magnet 4.

[0022] Furthermore, the first and second grooves are of the same shape and size, and the magnet 4 can be installed onto the tuning fork body, or installed onto the tuning fork body via a component.

[0023] When the tuning fork is struck to vibrate, the two vibration arms 2 of the tuning fork are in opposite vibration directions, and are in a vibration state of being close to each other or far away from each other at the same time. Therefore, the magnet placed on the tuning fork can effectively observe the influence of the magnet on the tuning fork. According to the placement position and state of the magnet, the vibration amplitude of the tuning fork becomes larger or smaller. In the first embodiment, the following experiments can be performed:

[0024] Experiment 1: directly strike the tuning fork to observe the vibration state of the tuning fork;

[0025] Insert the ends of the two vibration arms 2 into the magnet 4, strike the tuning fork, and observe the vibration state of the tuning fork;

[0026] Adjust the N and S directions of the two magnets 4, which can be both outward or both inward, or one outward and the other inward. Strike the tuning fork and observe the vibration state of the tuning fork.

[0027] Experiment 2: insert the ends of the two vibration arms 2 into the assembly 3, strike the tuning fork, and observe the vibration state of the tuning fork;

[0028] Insert the top of the assembly 3 into the magnet 4, strike the tuning fork, and observe the vibration state of the tuning fork;

[0029] Adjust the N and S directions of the two magnets 4, which can be both outward or both inward, or one outward and the other inward. Strike the tuning fork and observe the vibration state of the tuning fork.

[0030] Further, the same mass and material as the magnet and the vibration arm are included, which can be installed in the first groove or the second groove to replace the magnet and increase the diversity of the experiment. The following experiments can also use the mass to replace one or all magnets to observe the corresponding state.

[0031] As shown in Figure 2 The side of the assembly is provided with a third groove 5 for inserting the magnet 4, which can replace the groove provided at the top of the assembly, and the following experiments can be performed:

[0032] Experiment 3: insert the ends of the two vibration arms 2 into the assembly 3, strike the tuning fork, and observe the vibration state of the tuning fork;

[0033] Insert the magnet 4 into the side of one of the assemblies 3, strike the tuning fork, and observe the vibration state of the tuning fork;

[0034] Insert the magnet 4 into the side of both assemblies 3, strike the tuning fork, and observe the vibration state of the tuning fork;

[0035] Adjust the N end and S end of two magnets 4 to face left, right, or one N end to the left and the other S end to the right, and knock the tuning fork to observe the vibration state of the tuning fork.

[0036] Further, the end side of the vibration arm can also be provided with a fourth groove for replacing the second groove of the assembly.

[0037] As shown in Figure 3 The assembly includes an upper rod 6 and a lower rod 7, and the cross section of the upper rod 6 is the same as that of the vibration arm.

[0038] A fifth groove 8 is provided at the top of the upper rod 6, and a sixth groove 9 is provided on the side, which can respectively install magnets on the top and side, and change the different orientations of the magnets. In addition to the operations of experiments one to three described above, the following experiments can also be performed:

[0039] Experiment four, the ends of two vibration arms 2 are inserted into the assembly 3, one side of one assembly is inserted into a magnet 4, and the top of the other assembly is inserted into a magnet 4. By knocking the tuning fork, the vibration state of the tuning fork is observed.

[0040] Adjust the N end and S end of two magnets 4 to face left, right, or one N end to the left and the other S end to the right, and knock the tuning fork to observe the vibration state of the tuning fork.

[0041] Further, it also includes a mass that is the same as the magnet and has the same material as the vibration arm, which can be installed in the first groove or the second groove.

[0042] As shown in Figure 4 The side of the assembly is provided with a through hole 10 for inserting a magnet 4, and at this time the magnet is inserted into the through hole 10, and the observation can be performed according to the steps of experiment three.

[0043] On the basis of the above embodiments, further, the first groove is circular or regular polygonal in shape, and the lower end cross section of the assembly is circular or regular polygonal. Further, when the assembly is connected, the assembly can be inserted into the first groove instead of the threaded fitting mode, the first groove is provided with an internal thread, and the lower rod is provided with an external thread, which is fitted by the thread and the first groove.

[0044] Further, the material of the assembly is the same as that of the vibration arm.

[0045] The observation magnetic field uses a tuning fork, and through the design of the detachable assembly structure, better carrying and installation effects are achieved, and the utility model has the following advantages: (1) the vibrating arm of the tuning fork can be installed with a magnet, and also can be installed with an assembly provided with a magnet, and the installation mode is simple and easy to operate; (2) through knocking the tuning fork, the influence of the magnetic field on the tuning fork can be found according to the vibration time and the wave spectrum diagram of the tuning fork, and the method is intuitive and easy to understand; (3) the magnetic field with the same vibration frequency as the vibration frequency of the tuning fork can be provided.

Claims

1. A tuning fork for observing magnetic fields, characterized by: The tuning fork body includes a handle and two arms connected to the handle, the front end of the arms is fixed to the handle, and the end of the arms is provided with a first groove for inserting a magnet or an assembly, the lower end of the assembly is used for inserting the first groove of the end of the arm, and the top of the assembly is provided with a second groove for inserting the magnet.

2. The magnetic field viewing tuning fork of claim 1, wherein: The side of the assembly is provided with a third groove for inserting the magnet.

3. The magnetic field viewing tuning fork of claim 1, wherein: The side of the assembly is provided with a through hole for inserting the magnet.

4. The magnetic field viewing tuning fork of claim 1, wherein: The shape and size of the first groove and the second groove are the same, and the magnet can be installed on the tuning fork body or through the assembly.

5. The magnetic field viewing tuning fork of claim 1, wherein: The shape of the first groove is a circle or a regular polygon, and the lower end of the assembly is a circle or a regular polygon in cross section.

6. The magnetic field viewing tuning fork of claim 1, wherein: The end of the arm is provided with a fourth groove on the side, which is used to replace the second groove of the assembly.

7. The magnetic field viewing tuning fork of claim 1, wherein: The material of the assembly is the same as that of the arm.

8. The magnetic field viewing tuning fork of claim 1, wherein: It also includes a mass with the same mass and material as the magnet and the arm, which can be installed in the first groove or the second groove.

9. The magnetic field viewing tuning fork of claim 1, wherein: The assembly includes an upper rod and a lower rod, and the cross section of the upper rod is the same as that of the arm.

10. The magnetic field viewing tuning fork of claim 9, wherein: The first groove is provided with an internal thread, and the lower rod is provided with an external thread, which is matched with the first groove through the thread.

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