JPS6145843B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a device for levitating an object in the air using magnetic repulsion, and in particular, a device for stably holding an object levitating in the air. This is related to the improvement of

[Prior Art] Research has been conducted in the past, for example, in the field of railways, to utilize magnetic repulsion to keep objects suspended in the air.

Furthermore, for example, Japanese Utility Model Application Publication No. 50-154089 discloses a technique for levitating a toy in the air by using magnetic repulsion or magnetic attraction.

[Problems to be solved by the invention] However, the above-mentioned research in the railway field is aimed at mass transportation of passengers, and therefore the equipment is large and complex, and objects cannot be moved using magnetic repulsion. It is unsuitable for application to devices that display information by levitating in the air. Furthermore, although the above-mentioned publication discloses a technology for levitating toys in the air, it merely levitates the toys in the air, and does not take any measures to ensure the positional stability of the levitating toys. do not have. Therefore, although the toy is suspended in the air, it has the problem of lacking positional stability.

[Means for Solving the Problems] Accordingly, in the present invention, in order to ensure the positional stability of an object floating in the air by utilizing magnetic repulsion, each object is connected to the object by a connecting member. A plurality of permanent magnets are placed apart from each other, and a magnet separate from the magnet used to levitate this object is placed on the base side, and a permanent magnet placed on this object and a magnetic repulsion are placed on the base side. Alternatively, a magnet is arranged to generate magnetic attraction. Also,
This magnet is composed of an electromagnet, and a position detection means for detecting the position of the object levitating in the air is provided, and the signal supplied to the electromagnet is controlled based on the output signal from the position detection means, so that the object levitates in the air. This improves the positional stability of objects.

[Function] Since the plurality of magnets provided on the object to levitate the object are spaced apart, the positional stability of the object when it levitates in the air is improved. In addition, a magnet separate from the multiple sets of magnets arranged to levitate the object is placed on the base side, and a magnet acts between this magnet and the permanent magnet placed on the object to be levitated. By using repulsion or attraction, it is possible to improve the positional stability of objects floating in the air.

[Embodiments of the Invention] The present invention will be described below with reference to the drawings. Magnet installed on base B in Figures 1 and 2
M ₃ and M ₄ are the S pole and S pole and the N pole and N pole of each magnet.
The poles are spaced apart from each other so that they face each other.
Therefore, magnetic repulsion is generated between the respective magnets. The magnets M ₅ and M ₆ are also provided on the base B, and are spaced apart from each other so that the south pole and the south pole and the north pole and the north pole of each magnet face each other. A magnetic repulsion is formed between the magnets, and the magnets M ₃ and M ₄ and the magnets M ₅ and M ₆ each constitute a set of magnets, and the magnets M ₃ and M ₄ constitute a set of magnets. and a set of magnets M ₅ and M ₆ are spaced apart by a predetermined distance.

M ₁ and M ₂ are each permanent magnets, and are fixed on a connecting member 1 for connecting them. The permanent magnets M ₁ and M ₂ are separated from each other by a pair of magnets M ₃ and M ₄ and a pair of magnets M ₅ and M ₆ . They are separated from each other by approximately the same distance. A weight G is provided approximately at the center of the connecting member 1, and serves as a balancer when an object including the magnets M ₁ and M ₂ and the connecting member 1 is suspended in the air. Figure 3 shows that a permanent magnet M ₁ fixed to the end of the connecting member 1 forms a magnetic repulsion force between it and magnets M ₃ and M ₄ provided on the base B, which causes an object to move in the air. FIG. 2 is a diagram showing the principle of levitation.

In this figure, the respective magnetic poles of the permanent magnet _M1 fixed to the end of the connecting member 1 are arranged to face the respective magnetic poles formed on the magnets _M3 and _M4 provided on the base B with the same polarity. Made of permanent magnet
There is a magnetic repulsion between M ₁ and the N pole of each magnet M ₃ .
f ₁ , ₃ are formed, and magnetic repulsion forces f ₁ , ₄ are formed between the respective N poles of permanent magnet M ₁ and magnet M ₄ .
As a result, a resultant force f ₀ is formed in the direction opposite to the gravity, and the object equipped with the permanent magnets M ₁ and M ₂ is levitated in the air in such a manner that the gravity and the resultant force f ₀ are counterbalanced.
Also, in the direction of separation of the magnets M ₃ and M ₄ , they are positioned at a position where the component forces of the magnetic repulsion forces f ₁ , ₄ , f ₁ , ₃ are balanced. A similar force is formed at the S pole, which is the other magnetic pole of the permanent magnet _M1 , and acts to levitate the object in the air. A similar magnetic repulsion is formed between the permanent magnet _M2 fixed to the other end of the connecting member 1 and the magnets _M5 and _M6 provided on the base B, so that the object is levitated in the air. act. Note that the permanent magnets M ₁ and M ₂ , which generate the buoyancy force to levitate an object, are fixed to both ends of the connecting member 1 at a predetermined distance from each other, so that the buoyancy force is generated. Improves positional stability in the direction in which the

That is, as shown in Fig. 2, the Z-axis is taken in the direction of gravity, and the permanent magnets M ₁ and M ₂ are perpendicular to the Z-axis.
The X axis is taken in the direction in which the are separated from each other, and the Z axis,
When this object levitation device is arranged in an orthogonal coordinate system with the Y axis in a direction perpendicular to the X axis and in which magnets M ₃ and M ₄ or magnets M ₅ and M ₆ are spaced apart from each other, the permanent magnet M The resultant force of magnetic repulsion acting between ₁ and magnets M ₃ and M ₄ and between permanent magnet M ₂ and magnets M ₅ and M ₆ points in the Z-axis direction, and this resultant force is combined with the gravity of the object. Objects levitate in the air as if they were competing with each other. Furthermore, since this combined force acts on both ends of the connecting member, the positional stability in this direction is excellent. Furthermore, since the magnets M ₃ and M ₄ and the magnets M ₅ and M ₆ are each separated from each other by a predetermined distance,
It moves to a position where the Y-axis component of the magnetic repulsion described above is canceled, and therefore the positional stability in the Y-axis direction is also excellent.

However, although a force to regulate the position of an object suspended in the air acts on it in the Z-axis direction and the Y-axis direction, no force to regulate its position acts on the object in the X-axis direction. Positional stability in the X-axis direction is not sufficient. Therefore, in the present invention, the position of the object is regulated also in this direction.

In order to realize this, the X of the connecting member 1 is shown in Fig. 3.
By arranging an electromagnet M ₇ on an extension line in the axial direction and controlling the excitation current supplied to this electromagnet M ₇ , the magnetic force acting between this electromagnet M ₇ and the permanent magnet M ₁ is controlled and A concrete means for regulating the position of a floating object in the X-axis direction is shown.

That is, in order to regulate the position of an object floating in the air in the X-axis direction, a phototransistor 6, which is a light receiving element, is provided on the base side, and a light emitting diode 4 is activated by a signal output from a high frequency oscillator 5. is modulated and flashes. Therefore, the amount of light received by the phototransistor 6 changes depending on the positional change of the object floating in the air. The signal output from the phototransistor 6 is supplied to the detection circuit 8 via the amplifier 7.
demodulated. The signal output from the detection circuit 8 is supplied to a differentiating circuit 9, differentiated, and supplied to an amplifier 10. In the amplifier 10, an excitation current for exciting the electromagnet _M7 is generated based on the signal output from the differentiating circuit 9, and is supplied to the electromagnet _M7 .
For example, if a floating object changes its position in the X-axis direction in a direction in which the amount of light received by the phototransistor 6 increases, the electromagnet M ₇
An excitation current is supplied to the electromagnet M7 so that a magnetic attraction force acts between the core 2 and the permanent magnet _M1 , which are provided in the magnet _M7 , and its positional fluctuations are compensated for. As illustrated in FIG. 4, the electromagnet _M7 has a core 2 in the center, and a coil 3 is wound around the core 2.

The differential circuit that constitutes this servo system, which is provided to regulate the position of objects floating in the air, is used to stabilize the servo system by optimizing the servo loop constant. i.e. electromagnet
_M7 is excited to compensate for the positional variation when the permanent magnet _M1 moves from its balance point, but if the level of the signal output from the phototransistor 6 is simply shifted to form an exciting current. It was discovered that the servo system became unstable. Therefore, as shown in FIG.
The level of the output signal (A in the figure) is level-shifted by the detection circuit 8 to form a signal with a waveform as shown in B in the figure. Next, this signal is differentiated by a differentiating circuit 9 to form an exciting current having a waveform that rises steeply and falls relatively quickly (FIG. 3C), thereby exciting the electromagnet _M7 .

Note that the differentiating circuit 9 is constituted by a nonlinear circuit that can obtain a signal with a waveform with a steep rise, such as a circuit having a square characteristic.

The height of the levitation of permanent magnets M ₁ and M ₂ is magnet M ₁
~ Determined by the strength of the magnetic force of M ₆ , magnet M ₁ and electromagnet M ₇
The distance between them is also determined by the strength of the magnetic force of each magnet. Experiments have shown that a flying height of 2 to 3 cm can be obtained even with the use of inexpensive alnico magnets.
It is easy to set the distance between M ₁ and M ₂ to about 3 to 4 cm. When using a Samariyuum Cobalt magnet with a large residual magnetic velocity, or a permanent magnet M ₁ ,
The buoyancy force can be further increased by shortening the distance between each magnetic pole of M ₂ and eliminating the weight of the portion that does not contribute to the buoyancy force. Furthermore, when the electromagnet M ₇ is also provided on the side of the permanent magnet M ₂ , the stable operation range for regulating the position of an object floating in the air in the X direction can be expanded. Furthermore, in order to prevent vibration in the Y direction, an electromagnet similar to _M7 may be provided on the base B.

[Effects of the Invention] As explained above, according to the present invention, by fixing a plurality of permanent magnets to a connecting member at a predetermined distance from each other, an object equipped with these permanent magnets can be stabilized in the air. A magnet separate from the magnet provided on the base is placed on the base side in order to levitate the object, and the position of the object levitated in the air is controlled by this magnet. Positional stability can be further improved by this.

[Brief explanation of the drawing]

Figures 1 and 2 are schematic diagrams showing one embodiment of the present invention, Figure 3 is a diagram for explaining the formation of buoyancy force, Figure 4 is a configuration diagram of electromagnet _M7 , and Figure 5 5B shows the output waveform of the phototransistor 6, FIG. 5B shows the output waveform of the detection circuit 8, and FIG. DESCRIPTION OF SYMBOLS 1... Connection member, 4... Light emitting diode, 6... Phototransistor, 9... Differential circuit, _M1 - _M6 ... Magnet, _M7 ... Electromagnet.

Claims (1)

[Claims] 1. A plurality of magnets spaced apart from each other on a base;
A magnetic device consisting of an object equipped with a permanent magnet, which causes the object to levitate in the air by forming a magnetic repulsion between the permanent magnet and each magnet spaced apart from the base. In an object levitation device using repulsive force, a plurality of sets of magnets are arranged spaced apart from each other on the base, with a plurality of magnets arranged facing each other at a distance on the base; A plurality of permanent magnets are provided, each of which is connected to each other by a connecting member, and a magnetic repulsion is formed between the magnets of each set arranged on the base, so that the object is A magnet for controlling the position of the object suspended in the air is placed on a base, and magnetic attraction or repulsion acts between the magnet and a permanent magnet placed on the object. An object levitation device using magnetic repulsion, characterized in that the position of the object levitating in the air is controlled by force. 2. The magnet arranged on the base to regulate the position of the object suspended in the air is composed of an electromagnet and is equipped with a position detection means for detecting the position of the object suspended in the air, and the position detection means An object using magnetic repulsion according to claim 1, wherein the position of the object suspended in the air is regulated by controlling the signal supplied to the electromagnet based on the signal output from the electromagnet. flotation device.