JP2804848B2 - Manufacturing method of shield room and anechoic chamber - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield room for shielding an electromagnetic field and a method for manufacturing an anechoic chamber for preventing leakage of radio waves.

[0002]

2. Description of the Related Art In general, an electromagnetically shielded room is designed to meet the specifications of equipment used therein, such as performance, accuracy,
Electromagnetic environment, etc., and environmental conditions around the shield room,
For example, materials, components, structures of openings, and the like are designed in consideration of compatibility with peripheral devices, electromagnetic environment, usability, and the like.

[0003] Depending on whether the equipment used in the shielded room needs a shield for the magnetic field component, a shield for the electric field component, or a shield for both of these, The sealing structure is different. For example, in a shielded room that uses a sensor that measures weak magnetism, it is necessary to shield both the electric field component and the magnetic field component.A material with high magnetic permeability to shield the magnetic field component and a conductive material to shield the magnetic field component There is a demand for a shield room having a structure combining materials with high performance.

[0004] As a sensor for measuring the above-mentioned weak magnetism, for example, an ultra-highly developed sensor for detecting a weak brain magnetic wave generated from the brain and elucidating diseases such as stroke and epilepsy is currently being developed. Electric quantum interference device (SQUI
D) There is a sensor. Since this sensor measures a weak magnetism of 10 −12 Tesla, it is necessary to reliably block electromagnetic noise generated from the surrounding environment in order to use this sensor.

At present, a shield room using this sensor is designed so that a magnetic field component is shielded by a highly permeable material such as permalloy, and an electric field component is shielded by a highly conductive material such as copper, zinc, and iron. It is configured by combining a plate made of a highly magnetically permeable material and a plate made of a highly conductive material in a number of layers in a panel shape.

[0006]

However, as described above, when a shielded room is constructed by combining a plate made of a highly magnetically permeable material and a plate made of a highly conductive material into a plurality of layers in a panel shape. In addition, there is a problem that a complicated design is required in terms of structure and performance, and the manufacturing cost is increased.

That is, there is a problem that it is necessary to make a very complicated design in structural aspects such as weight, lamination, earthquake resistance, and the like, and in performance aspects such as openings, joints, and penetrations. Was. On the other hand, an anechoic chamber for preventing radio wave leakage is conventionally formed by fixing a radio wave absorber as necessary to the inner wall of a shield room,
In order to construct a shielded room, the above-mentioned problems occur.

The present invention has been made to solve such a conventional problem, and provides a method of manufacturing a shielded room and an anechoic chamber which has a simple structure and can significantly reduce the manufacturing cost as compared with the conventional one. The purpose is to do.

[0009]

According to a first aspect of the present invention, there is provided a method for manufacturing a shield room, wherein a metal made of a highly magnetically permeable material for shielding a magnetic field component is sprayed on a building frame at a low temperature to form a first low temperature sprayed layer. After that, on the surface of this first low-temperature sprayed layer,
It is characterized in that a metal made of a highly conductive material for shielding an electric field component is sprayed at a low temperature to form a second low-temperature sprayed layer. The method of manufacturing a shielded room according to claim 2, wherein a metal made of a highly conductive material for shielding an electric field component is low-temperature sprayed on the building frame to form a first low-temperature sprayed layer, and then the first low-temperature sprayed layer is formed. A second low-temperature sprayed layer is formed by applying a low-temperature spray of a metal made of a highly magnetically permeable material for shielding a magnetic field component to the surface of the second layer.

According to a third aspect of the present invention, there is provided a method for manufacturing an anechoic chamber, wherein a metal made of a highly magnetically permeable material for shielding a magnetic field component is low-temperature sprayed on a building frame to form a first low-temperature sprayed layer.
On the surface of the first low-temperature spray layer, a metal made of a highly conductive material for shielding electric field components is low-temperature sprayed to form a second low-temperature spray layer, and then, on the surface of the second low-temperature spray layer, The radio wave absorber is fixed. Claim 4
The method of manufacturing an anechoic chamber of the present invention is to form a first low-temperature sprayed layer on a building frame by low-temperature spraying a metal made of a highly conductive material for shielding electric field components, A second low-temperature sprayed layer is formed by low-temperature spraying a metal made of a highly magnetically permeable material for shielding a magnetic field component, and thereafter, a radio wave absorber is fixed to the surface of the second low-temperature sprayed layer. And

[0011]

In the method for manufacturing a shielded room according to the first aspect, a metal made of a highly magnetically permeable material for shielding a magnetic field component is low-temperature sprayed on the building frame to form a first low-temperature sprayed layer. A metal made of a highly conductive material for shielding electric field components is sprayed at a low temperature on the surface of the first low-temperature sprayed layer to form a second low-temperature sprayed layer. In the method for manufacturing a shielded room according to the second aspect, a metal made of a highly conductive material for shielding an electric field component is low-temperature sprayed on the building frame to form a first low-temperature sprayed layer, and thereafter, the first low-temperature sprayed layer is formed. A metal made of a highly magnetically permeable material for shielding magnetic field components is sprayed at a low temperature on the surface of the sprayed layer to form a second low-temperature sprayed layer.

According to the third and fourth methods of manufacturing an anechoic chamber, the radio wave absorber is fixed to the surface of the second low-temperature sprayed layer of the shield room manufactured as described above.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a shield room manufactured by an embodiment of the method for manufacturing a shield room of the present invention. In the figure, reference numeral 11 denotes a building frame formed of, for example, reinforced concrete.

As shown in FIG. 2, a metal made of a highly magnetically permeable material such as permalloy, amorphous or the like for shielding magnetic field components is directly sprayed at a low temperature on the entire inner surface of the building frame 11 as shown in FIG. , A first low-temperature sprayed layer 13 is formed. Then, on the surface of the first low-temperature sprayed layer 13, a metal made of a highly conductive material for shielding electric field components such as brass, copper, aluminum, and zinc is low-temperature sprayed, and the second low-temperature sprayed layer 15 is formed. Is formed.

FIG. 3 shows an example of a low-temperature spraying device (spraying device manufactured by Nippon Teion Spraying Co., Ltd.) used for low-temperature spraying of a metal made of a highly conductive material (or a highly magnetically permeable material). The low-temperature thermal spraying device includes a thermal spraying machine 21, a power supply box 23, and a screw compressor 25. A bobbin (not shown) in which a wire 27 made of a highly conductive material (or a highly magnetically permeable material) is wound is housed in the power supply box 23, and one end of the wire 27 is connected to the spraying machine 21. .

One end of an air hose 29 is connected to the screw compressor 25, and the air hose 29 is connected to the thermal spraying machine 21 via a power supply box 23. In the drawing, reference numeral 31 denotes a power supply, reference numeral 33 denotes a ground, and reference numeral 35 denotes a cable.

The first using such a low-temperature spraying apparatus is as follows.
As shown in FIG. 1, the low-temperature thermal spray layer 13 or the second low-temperature thermal spray layer 15 is formed by operating the screw compressor 25 and the power supply box 23 and holding the thermal spray machine 21 by hand. Then, for example, the particles of the electrically-discharged wire 27 are
Sprayed from the thermal spraying machine 21, the building skeleton 11 or the first
This is performed by spraying the low-temperature sprayed layer 13.

In the low-temperature thermal spraying apparatus described above, the thickness of the low-temperature thermal spraying layers 13 and 15 may be adjusted, for example, by 50
It can be set arbitrarily from a micrometer to about 50 mm. According to the method for manufacturing a shield room as described above, a metal made of a highly magnetically permeable material for shielding a magnetic field component is low-temperature sprayed on the building body 11 to form the first low-temperature sprayed layer 13. First low temperature sprayed layer 1
Since the second low-temperature sprayed layer 15 is formed on the surface of No. 3 by metal spraying a metal made of a highly conductive material for shielding the electric field component at a low temperature, the structure is simple and the manufacturing is significantly larger than the conventional one. Costs can be reduced.

That is, in the method for manufacturing a shield room according to the present invention, the shield room is formed by combining a plate made of a highly magnetically permeable material and a plate made of a highly conductive material in a number of layers, as in the prior art. Since there is no need to configure, it is not necessary to make a complicated design in terms of structure and performance, and it is possible to reduce the manufacturing cost with a simple structure and significantly more than before.

In the method for manufacturing a shield room according to the present invention, the second low-temperature sprayed layer 15 is formed on the first low-temperature sprayed layer 13 by, for example, low-temperature spraying at a sprayed surface temperature of about 30 ° C. , The first low temperature sprayed layer 15
The properties of the low-temperature sprayed layer 13 are not changed, and high magnetic permeability or high conductivity can be sufficiently maintained.

Further, in the method for manufacturing a shield room according to the present invention, since different types of materials can be sprayed on any number of layers, the space space can be reduced as compared with the conventional method.
Further, in the method of the present invention, since the thickness of the low-temperature sprayed layers 13 and 15 can be freely changed, the most economical shield room can be easily formed according to the shield performance required for the shield room. Becomes

Further, the above-mentioned low-temperature thermal spraying apparatus is very easy to handle, and the thermal spraying can be easily reworked, so that even a layman can easily form the low-temperature thermal spraying layers 13 and 15. Become. FIG. 4 shows an embodiment of a method for manufacturing an anechoic chamber according to the present invention. In this embodiment, for example, ferrite is applied to the surface of the second low-temperature sprayed layer 15 of the shield room manufactured as described above. A radio wave absorber 41 made of a plate, a urethane-based absorber, or the like is fixed by, for example, an adhesive, and a radio wave anechoic chamber is manufactured.

In the method for manufacturing an anechoic chamber as described above, the first low-temperature sprayed layer 13 is formed on the building body 11 by low-temperature spraying a metal made of a highly magnetically permeable material for shielding a magnetic field component. Thereafter, a metal made of a highly conductive material for shielding electric field components is sprayed at a low temperature on the surface of the first low-temperature sprayed layer 13 to form a second low-temperature sprayed layer 15, and thereafter, the second low-temperature sprayed layer 15 is formed. 15 on the surface of the radio wave absorber 41
Is fixed, so that it is possible to reduce the manufacturing cost with a simple structure and significantly more than in the past.

In the embodiment described above, the building frame 1
First, after forming a first low-temperature sprayed layer 13 made of a highly magnetically permeable material for shielding a magnetic field component, the first low-temperature sprayed layer 13 is made of a metal made of a highly conductive material for shielding an electric field component. Has been described at a low temperature to form the second low-temperature sprayed layer 15, but the present invention is not limited to such an example, and the building frame may be made of a highly conductive material for shielding electric field components. After forming the first low-temperature sprayed layer, a second low-temperature sprayed layer made of a metal made of a highly magnetically permeable material for shielding a magnetic field component may be formed on the first low-temperature sprayed layer. is there.

In the embodiment described above, the building skeleton 1
Although the example in which the first low-temperature thermal spray layer 13 and the second low-temperature thermal spray layer 15 are formed is described in FIG. 1, the present invention is not limited to such an example, but includes a high magnetic permeability material and a high conductive material. Needless to say, a plurality of low-temperature sprayed layers may be alternately formed. Further, in the embodiment described above, the example in which the first low-temperature sprayed layer 13 is directly formed on the building body 11 has been described. However, the present invention is not limited to such an embodiment, and the building body and the first low-temperature When electrical insulation with the sprayed layer is required, it is a matter of course that the first low-temperature sprayed layer may be formed after applying an insulating resin such as an epoxy resin to the building frame.

In the embodiment described above, the building skeleton 1
Although an example in which the first low-temperature sprayed layer 13 is directly formed is described in FIG. 1, the present invention is not limited to such an example. For example, the floor, wall, ceiling, etc. constituting the building frame may be made of mortar, concrete, or the like. , Cracks in connecting parts of boards, etc.
When cracks and the like can occur, it is a matter of course that the first low-temperature sprayed layer may be formed after, for example, attaching a fibrous sheet material having shielding performance.

[0027]

As described above, in the method for manufacturing a shielded room according to the first aspect, a metal made of a highly magnetically permeable material for shielding a magnetic field component is sprayed at a low temperature on the building frame.
After forming the first low-temperature sprayed layer, a metal made of a highly conductive material for shielding electric field components is low-temperature sprayed on the surface of the first low-temperature sprayed layer to form a second low-temperature sprayed layer. Therefore, there is an advantage that the manufacturing cost can be significantly reduced with a simple structure and in comparison with the related art. In the method for manufacturing a shielded room according to the second aspect, a metal made of a highly conductive material for shielding an electric field component is low-temperature sprayed on the building frame to form a first low-temperature sprayed layer.
Low-temperature spraying of a metal made of a highly magnetically permeable material to shield the magnetic field component on the surface of the low-temperature spray layer to form the second low-temperature spray, so that it has a simple structure and is manufactured significantly more than before. There is an advantage that cost can be reduced.

According to a third aspect of the present invention, in the method of manufacturing an anechoic chamber, the surface of the second low-temperature sprayed layer of the shield room manufactured according to the first or second aspect is provided.
Since the radio wave absorber is fixed, with a simple structure,
In addition, there is an advantage that the manufacturing cost can be significantly reduced as compared with the related art.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a state in which a shield room is manufactured by one embodiment of a method for manufacturing a shield room of the present invention.

FIG. 2 is a sectional view showing details of a portion II in FIG. 1;

FIG. 3 is a perspective view showing an example of a low-temperature spraying apparatus.

FIG. 4 is a cross-sectional view showing a wall of the anechoic chamber manufactured by one embodiment of the method for manufacturing an anechoic chamber of the present invention.

[Explanation of symbols]

 11 Building frame 13 First low-temperature spray layer 15 Second low-temperature spray layer 41 Radio wave absorber

Continuation of the front page (72) Inventor Nobuo Murakami 2-14-14 Minamisuna, Koto-ku, Tokyo Inside the Technical Research Center, Takenaka Corporation (58) Field surveyed (Int. Cl. ⁶ , DB name) E04H 9 / 14 E04F 13/00 H05K 9/00

Claims (4)

(57) [Claims] 1. A low temperature thermal spraying of a metal made of a highly magnetically permeable material for shielding a magnetic field component onto a building frame to form a first low temperature thermal spraying layer, and then an electric field component on the surface of the first low temperature thermal spraying layer. A method for manufacturing a shielded room, comprising: forming a second low-temperature sprayed layer by low-temperature spraying a metal made of a highly conductive material for shielding a metal. 2. A low temperature thermal spraying of a metal made of a highly conductive material for shielding an electric field component onto a building frame to form a first low temperature thermal spraying layer, and a magnetic field component is formed on a surface of the first low temperature thermal spraying layer. A method for manufacturing a shielded room, comprising: forming a second low-temperature sprayed layer by low-temperature spraying a metal made of a highly magnetically permeable material for shielding a metal. 3. A low temperature thermal spraying of a metal made of a highly magnetically permeable material for shielding a magnetic field component onto a building frame to form a first low temperature thermal spraying layer, and then an electric field component on the surface of the first low temperature thermal spraying layer. Forming a second low-temperature sprayed layer by low-temperature spraying of a metal made of a highly conductive material for shielding a radio wave absorber, and thereafter, fixing a radio wave absorber on the surface of the second low-temperature sprayed layer. How to make a darkroom. 4. A low temperature thermal spraying of a metal made of a highly conductive material for shielding an electric field component onto a building frame to form a first low temperature thermal spraying layer, and then a magnetic field component is formed on the surface of the first low temperature thermal spraying layer. Forming a second low-temperature sprayed layer by low-temperature spraying a metal made of a highly magnetically permeable material for shielding the surface, and then fixing a radio wave absorber on the surface of the second low-temperature sprayed layer. How to make a darkroom.