KR20170074248A - Magnetic levitation force measuring device of superconductor for education - Google Patents

Abstract

The present invention relates to a magnetic levitation force measuring device for a training superconductor, which can easily observe the magnetic levitation force using a repulsive force or a levitation force generated by a superconductor. The apparatus includes a container unit for accommodating a superconductor as a non- A fixed jig part which is spaced apart from the upper part of the container part and moves in the Z axis and which has a magnet coupling part for detachably attaching a magnet to one side thereof and a fixing part for fixing the container part to the X axis and Y And a load cell unit provided on the fixing jig for measuring a load due to the characteristics of the superconductor.

Description

[0001] MAGNETIC LEVITATION FORCE MEASURING DEVICE OF SUPERCONDUCTOR FOR EDUCATION [0002]

The present invention relates to a magnetic levitation force measuring device for a training superconductor, and more particularly, to a magnetic levitation force measuring device for a training superconductor, which can easily observe the magnetic levitation force using the repulsive force or the levitation force generated by the superconductor. ≪ / RTI >

Recently, it has been actively applied in various fields such as automobile, semiconductor, medical (MRI), and transportation by using various characteristics of superconductors.

As the use of superconductors increases, the need for measuring instruments to measure the characteristics of superconductors is emerging. However, since most of the magnetic force measuring instruments are imported from foreign countries, the unit price is high and mass production is difficult.

In addition, the magnetic force measuring equipment currently used on the market is very limited because it can measure the entire sample only. However, in the case of superconducting specimens, it is necessary to equip the specimens so that they can be measured partly because their characteristics are different from each other.

Also, since the equipment on the market is difficult to operate, it was dealt with only by a technician or an expert.

It is necessary to develop a magnetic levitation force measuring device to improve and mass-produce these problems.

Korean Patent Laid-Open Publication No. 2013-0034998 (published on March 31, 2013, entitled:

An object of the present invention is to provide a magnetically levitated force measuring device for a training superconductor, which observes and confirms the resultant value by visually observing the repulsive force due to the superconductor property or the levitation force generated by the superconductor with the magnet attached thereto.

The present invention also provides an apparatus for measuring the magnetic levitation force of an educational superconductor, which measures a specimen of a superconductor having different characteristics according to each quartile.

The technical objects to be achieved by the present invention are not limited to the above-mentioned technical problems.

According to an aspect of the present invention, there is provided an apparatus for measuring the magnetic levitation force of a training superconductor, the apparatus comprising: a container unit for containing a superconductor as a non-magnetic material; A stationary jig part having a magnet engaging part which is spaced apart from the upper part of the container part and moves in the Z axis and attaches and detaches the magnet to one side; An XY moving unit for moving the fixing jig in the X axis and the Y axis to adjust the position of the fixing jig above the container unit; And a load cell unit provided in the fixing jig for measuring the magnetic force of the magnet using the levitation force generated by the superconductor.

Specifically, the material of the container portion is acetal.

In addition, the XY moving unit moves the X-axis and Y-axis by an input pulse using a stepping motor.

The load cell unit may further include an indicator unit for outputting the load input to the load cell unit as an electrical signal or transmitting the load to the connected interface.

The imaginary magnet coupling portion is characterized in that a circular columnar magnet having a diameter of 1 mm to 20 mm is coupled.

Further, the magnet is a neodymium magnet.

As described above, the present invention has the effect of visually observing and checking the resultant value by measuring the magnetic levitation force using the repulsive force or the levitation force generated by the superconductor with the magnet attached thereto.

In addition, the present invention has the effect of totally or partially measuring the specimen of the superconductor having different characteristics according to each quartile.

Further, the present invention has an effect that a non-specialist can easily use it to observe the characteristics of a superconductor.

1 is a schematic view showing a magnetic levitation force measuring apparatus for a training superconductor according to an embodiment of the present invention.
2 is a diagram illustrating a prototype of a magnetic levitation force measuring apparatus for a training superconductor according to an embodiment of the present invention.
3 is a view illustrating a container unit of a magnetic levitation force measuring apparatus for a training superconductor according to an embodiment of the present invention.
4 is a flowchart illustrating an experimental method using a magnetic levitation force measuring apparatus for a training superconductor according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same components are denoted by the same reference symbols whenever possible. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

1 and 2 illustrate an apparatus for measuring the magnetic levitation force of a training superconductor according to an embodiment of the present invention. The apparatus 100 includes a container unit 110, a fixed jig unit 120, A portion 130, and a load cell portion 140.

The container portion 110 is formed of a non-magnetic material to receive the superconductor A. At this time, when the magnetic levitation force of the superconductor A is measured, liquid nitrogen is used to reach a temperature at which the specimen has a superconducting property. However, when the container 110 is made of aluminum, warping may occur, It is preferable that the material of the electrode 110 is acetal.

3, at least three fixing brackets 111 are preferably formed in the container 110 so that the superconductor A can be stably fixed to the container 110. In the embodiment of the present invention, Thereby forming a bracket 111.

The fixed jig 120 is spaced apart from the upper portion of the container 110 and moves in the Z axis direction and has a magnet coupling part 121 for detachably attaching a magnet 160 that generates a magnetic force to one side.

A cylindrical magnet 160 having a diameter of 1 to 20 mm may be coupled to the magnet coupling part 121 and the magnet coupling part 121 may be fixed to the fixing bracket 111 of the container part 110, A bracket (not shown) located inside a fastener (not shown) for fastening the magnet is disposed on the outer circumferential surface of the magnet 160 to fix the magnet 160 to the magnet coupling portion 121 while tightening the magnet 160.

At this time, the magnet coupling portion 121 may be in the form of a drill bit.

Here, the magnet 160 is preferably a neodymium magnet. Neodymium magnets have a magnetic force of 25 to 50 MGOe, are good in workability and can be reduced in terms of cost, and can be easily used in the present invention.

In addition, the use of neodymium magnets with a large magnetic force reduces the measurement error compared to the use of magnets with a small magnetic force. Neodymium magnets with a small diameter have a great effect in measuring the levitation force at a very small area, .

For example, in the case of a polycrystalline superconductor, the characteristics of the superconductor are different for each crystal. Therefore, the characteristics of the superconductor can be measured by using a small size neodymium magnet.

At this time, it is preferable that the fixing jig 120 is coupled to a support frame (not shown) and positioned above the container part 1140.

In the embodiment of the present invention, the fixing jig 120 is fixedly coupled to a control box (not shown).

The XY moving unit 130 moves the container unit 110 in the X and Y axes to adjust the position of the container unit 110 so as to be positioned below the stationary jig unit 120. [

In the embodiment of the present invention, the Z-axis movement of the fixed jig 120 and the X-axis and Y-axis movement of the XY movement unit 130 are preferably connected to a control unit (not shown) and controlled by a control switch. A detailed description thereof will be omitted.

At this time, since the number of input pulses is completely proportional to the rotation angle of the motor, the XY movement unit 130 moves the input pulse in the X and Y axes by using the stepping motor unit 131 which controls the rotation angle accurately.

The load cell unit 140 is provided in the fixed jig unit 120 to measure the load due to the magnet 160 fixed to the magnet coupling unit 121 and the superconductor A fixed to the container unit 110,

The characteristics of the superconductor (A) are such that the lines of magnetic force between the magnets (160) and the superconductor (A) are generated by fixing or reflecting.

When the superconductor A is cooled below the critical temperature in a state where the superconductor A and the magnet 160 are separated from each other by a predetermined distance, a levitation force is generated between the superconductor A and the magnet 160, A repulsive force is generated between the superconductor A and the magnet 160 when the magnet 160 is brought close to the superconductor A in a state where the superconductor A is cooled below the critical temperature and the repulsive force or the levitating force is measured using this principle.

The indicator unit 150 outputs an electrical signal corresponding to the load input to the load cell unit 140 or transmits the electrical signal to a connected interface (not shown) and collects the data as processable data. Thereby, the user can easily confirm the measured result.

An experimental method using the apparatus for measuring the magnetic levitation force of the educational superconductor of the present invention constructed as above is as follows.

First, the size of the magnet 160 according to the superconductor A is selected (S110). Since the present invention can partially measure the entire superconductor as well as the whole, it is preferable to select the magnet size according to the portion.

The magnet 160 can be selected from a cylindrical magnet having a diameter of 1 mm to 20 mm.

Next, the superconductor A is fixed to the container 110 (S120). The superconductor A to be measured is fixed using the fixing bracket 111 of the container unit 110. [

Then, the container unit 110 is moved according to the position of the magnet 160 (S130). The XY moving part 130 is moved using the stepping motor 131 to position the part of the superconductor A to be measured at the lower end of the magnet 160, (110).

Next, the inside of the container unit 110 is set to the critical temperature (S140). At this time, liquid nitrogen as a coolant may be added to cool the superconductor (A).

Next, the fixing jig 120 having the magnet 160 is moved in the Z-axis direction (S150). In this case, the fixed jig 120 is moved in the Z-axis direction to lower the magnet 160 in the downward direction where the container unit 110 having the superconductor A is located.

Finally, at least one of a levitation force and a repulsive force between the magnet 160 and the superconductor A of the fixing jig 120 descending to the superconductor A is measured (S160). The force applied to the magnet 160 and the superconductor A is measured through the load cell unit 140 and transmitted to the computer through the indicator unit 150.

Using the data transferred to the computer, information about the repulsive force such as a graph or a numerical value can be outputted.

Examples of the educational use of the present invention having the above-described configuration are as follows.

[Example 1] Physical experiment

  ■ Experimental goals

 - Measure the magnetic field around an electrically conducting wire, such as a solenoid.

   ■ Experimental Method

 1) Measure the weight of the magnet without turning on the power.

 2) Measure the magnets again after the current flows.

 3) Repeat the experiment of 3) changing the magnitude of current.

 4) Measure the difference in weight when current does not flow and flow, and write it in the table.

 5) Reverse the direction of the current and repeat the same experiment to compare the values.

 6) After fixing the current and the length of the wire, use a yoke to measure the change in magnetic force with the angle.

)를 확인 할 수 있다In this experiment, we measured the magnetism induced around an electric wire such as a solenoid, and measured the relationship between the current flowing in the solenoid and the magnetic field

) Can be confirmed

[Application example 2] Materials engineering experiment

  ■ Practice Objectives

 - Measure the magnetic force change of the magnet with temperature.

  ■ Experimental Method

    1) Prepare four magnets and make the temperature of each magnet different.

       Example - (1) Dry ice (-78˚C) (3) Indoor (25˚C)

             (2) Freezer (-10˚C) (4) Boiling water (100˚C)

    2) Leave magnet on each condition for at least 15 minutes to allow sufficient temperature to reach the magnet.

    3) Measure magnetic force in turn by temperature and write it in the table.

    4) Compare the experimental values for each temperature.

As a result of measuring the magnetic force change of the magnet according to the temperature by this experimental method, the material becomes one example showing that the alignment state of the atom changes with temperature. By measuring magnetism, educators can gain an insight into the effects of temperature on the material as well as the mechanical or physical state, as well as many other things.

[Example 3] Powder processing and practice

  ■ Practice Objectives

 - The strength of magnetic force is evaluated by fabricating superconductor using sintering method.

  ■ Experimental Method

  In this experiment, superconductors are fabricated directly using sintering. Among the various conductors, YBCO superconductor powder of RE-B-C-O type superconductor is mixed and a molded body is manufactured. After about 160 hours of heat treatment, 100 hours of oxygen heat treatment.

 - seed crystal growth method

 1) Seed crystals are planted on the YBCO shaped body.

 2) Partially melt the formed body.

 3) Gradually cool to allow YBCO superconducting crystals to grow from the seed.

The strength of the magnetic force of the superconductor thus manufactured can be evaluated to determine the characteristics of the superconductor.

Superconductors exhibit better characteristics as they grow into single crystals. The superconductors grown by this single crystal are highly semiconducting. Therefore, it is possible to evaluate the characteristics of the superconductor by measuring the magnetism levitation of the superconductor by using the magnetic force measuring apparatus to be developed in this experiment.

Therefore, the present invention has the effect of visually observing and checking the resultant value by measuring the magnetic levitation force using the repulsive force or the levitation force generated by the superconductor with the magnet attached thereto.

In addition, the present invention has the effect of totally or partially measuring the specimen of the superconductor having different characteristics according to each quartile.

Further, the present invention has an effect that a non-specialist can easily use it to observe the characteristics of a superconductor.

The apparatus for measuring the magnetic levitation force of the educational superconductor as described above is not limited to the configuration and the operation method of the embodiments described above. The above embodiments may be configured so that all or some of the embodiments may be selectively combined to make various modifications.

110: container part 120: fixed jig part
121: magnet coupling part 130: XY moving part
131: stepping motor unit 140: load cell unit
150: Indicator section

Claims (6)

A container portion for containing the superconductor as a non-magnetic material;
A stationary jig part having a magnet engaging part which is spaced apart from the upper part of the container part and moves in the Z axis and attaches and detaches the magnet to one side;
An XY moving unit moving the container unit in X and Y axes to adjust the position of the container unit to be positioned below the fixing jig; And
And a load cell unit provided in the fixing jig for measuring a load due to the characteristics of the superconductor.
The method according to claim 1,
Wherein the material of the container portion is acetal.
The method according to claim 1,
Wherein the XY moving unit moves the X and Y axes by an input pulse using a stepping motor.
The method according to claim 1,
And an indicator for outputting an electric signal according to the load inputted to the load cell unit or transmitting the electrical signal to an interface connected to the load cell unit.
The method according to claim 1,
Wherein the magnet coupling portion is coupled with a columnar magnet having a diameter of 1 mm to 20 mm.
The method according to claim 1 or 5,
Characterized in that the magnet is a neodymium magnet.

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