JP3845829B2 - TV radio wave non-reflective building - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a television anechoic type buildings, absorbed by the introduction into the building television waves especially flying, surrounded relates to television anechoic type buildings that do not reflected.
[0002]
[Prior art]
Recent buildings tend to be required to fully respond to the introduction of advanced information devices such as OA devices and personal computers and information systems using the same in response to the information age.
The required performance required for buildings in the information age is "preventing malfunction of information equipment" that protects equipment inside buildings from unwanted radiation from outside, and secondly, computer systems in buildings. Interference of communication carriers when wireless LAN is used between buildings adjacent to each other in “Securing information security” to block information leaked as low-level radio waves from the wireless LAN to the outside. It was to achieve “advanced use of radio frequency” in order to solve the shortage of channels due to.
In order to achieve these performances, it has been practiced to construct the entire building with an electromagnetic shielding structure by constructing it using an electromagnetic shielding material in the frame of the building and openings such as windows and doorways.
[0003]
As the deployment density of information and communications increases, the biggest theme is to prevent the electromagnetic wave from being mixed, and in order to meet this demand, the formation of effective communication zones and the separation of each communication zone It is necessary to increase the density.
Thorough electromagnetic wave shielding will block electromagnetic waves flying around the building, and electromagnetic waves will be reflected on the building, generating secondary noise in the surroundings and causing new electromagnetic interference. .
[0004]
One of the familiar electromagnetic waves in everyday life is the VHF and UHF TV radio waves with a frequency of 90 to 770 MHz. When a high-rise building is built, the electromagnetic waves reflected on this building will cause ghosts to reach a considerable distance. Had an obstacle.
With regard to TV radio wave reflection and shielding obstructions, countermeasures against TV radio wave interference have already been studied in buildings that are not shielded against electromagnetic waves.
[0005]
Among the obstacles to TV radio waves, the range where radio waves do not reach is relatively specified for shielding obstructions, so the building side may change the direction of the building or limit the height of the building. There are measures to reduce this, and the receiving side adopts a method of coping with installation of a joint reception facility, movement of an antenna, or subscription to an existing CATV.
On the other hand, various measures have been taken for reflex disturbance since the affected area is a long distance and wide area.
The measures on the building side are primarily the direction, arrangement, and height of the building, and then the reflection of the shape and material of the building's wall surface and the fact that it absorbs radio waves and does not reflect them. Consideration has been added.
[0006]
Measures based on the shape of the wall surface are intended to direct the cancellation of radio waves and the direction of reflection of radio waves in a direction that does not cause obstacles by providing unevenness or inclination on the wall surface.
As a measure for absorbing radio waves, many methods have been adopted, such as adopting a PC plate with ferrite tiles on the outer wall surface to give the building electromagnetic wave absorption performance.
The ferrite PC plate has a ferrite tile placed inside the fiber reinforced mortar with a tile, and a reflective reinforcing bar is placed on the back side to collect the radio waves radiated to the ferrite tile and convert it into heat. It is configured not to. In this case, the ferrite tile has a narrow frequency band of electromagnetic waves to be absorbed. Therefore, since different sizes and arrangements are prepared for VHF and UHF, the weight is bulky and the selection is complicated. Therefore, improvement was desired.
[0007]
Thus, as an electromagnetic wave absorber, a broadband electromagnetic wave absorber in which rectangular parallelepiped ferrite magnetic bodies are arranged in parallel on an electromagnetic wave reflection surface under a certain condition has been proposed (Japanese Patent Laid-Open No. 4-42999, (JP-A-4-53299) An attempt is made to expand the frequency band to be absorbed and reduce the weight. However, there is no description as to what structure the ferrite magnetic body is specifically formed into, and it is in a state of waiting for future development.
On the other hand, as a building, focusing on glass that does not reflect electromagnetic waves, a method of adopting a glass curtain wall for passing electromagnetic waves has been studied, but it depends on the building members present inside the glass curtain wall. Since reflections still exist, countermeasures remain a problem.
[0008]
[Problems to be solved by the invention]
In order to solve the above-mentioned problem, the present invention actively introduces VHF and UHF TV radio waves into a building, absorbs the radio waves in the building, and arranges an electromagnetic shielding room in the room. in is also intended to be'll provide television anechoic type building which does not cause harmful reflection.
[0009]
[Means for Solving the Problems]
In the present invention, a glass curtain wall is basically arranged on the outer wall of a high-layer part of four or more layers, and an electromagnetic wave absorption panel for horizontal polarization is installed on the indoor side and on the outside of the window and the beam on the indoor side. In addition, a TV radio wave that absorbs VHF and UHF TV radio waves by installing a horizontally polarized wave electromagnetic wave absorption panel on the outer wall surface of the electromagnetic wave shield room, which is an indoor wall with respect to the opening of the building in which the glass curtain wall is disposed. What non-reflective building der, horizontally polarized electromagnetic wave absorption panel for use therewith, one and the electromagnetic wave reflecting plate over the entire surface of the panel, vertical and parallel with a predetermined interval on the upper surface of the electromagnetic wave reflecting plate It is composed of arranged rectangular parallelepiped ferrites, and is characterized in that the upper surface of the ferrite is disposed in the direction of electromagnetic waves. Specifically, the horizontally polarized electromagnetic wave absorbing panel is installed outside the window sill and beam and shields the interior of the building from electromagnetic waves. A fireproof structure is attached to the lower surface of the electromagnetic wave reflector. And the ferrite upper surface of the horizontally polarized wave electromagnetic wave absorbing panel or between the ferrite and the upper surface of the ferrite is closed with a holding member of a fireproof structure.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a schematic view of a television radio wave non-reflective building according to the present invention.
The building 1 is composed of a high-rise part 2 and a low-rise part 3, and a countermeasure for preventing a radio wave from being disturbed is considered in the high-rise part 2.
When a TV radio wave is transmitted as shown by an arrow, a reflection disturbance caused by the reflection of the TV radio wave on the side of a building causes the affected area to extend over a long distance. The radio wave non-reflective building 1 has a glass curtain wall 4 that transmits television radio waves on the outer wall of the high-rise part 2 and is actively incorporated into the building without reflecting the television radio waves to cope with inside the building. By adopting a periodical configuration, the TV radio wave reflection is prevented.
[0011]
FIG. 2 shows the state of processing of TV radio waves at the window sill and beam in the TV radio non-reflective building 1 according to the present invention.
Looking at the radio wave reflectance of each material that makes up the wall of the building, the metal curtain wall is 100%, reinforced concrete 70%, unreinforced concrete 50%, magnetic tile 3%, glass 3%, and ferrite 1%. is there.
In the present invention, attention is paid to glass having a low reflectance from the above materials, and a glass curtain wall 4 is employed so that television radio waves enter the room and are not reflected by the outer wall of the building 1.
Since the building components are present on the indoor side of the glass curtain wall 4 in the same manner as in a normal building, the window stand 5, the beam 6, and the curtain wall support located near the outside of the building. In addition, the electromagnetic wave absorption panel 7 according to the present invention is arranged on the outside thereof, and is configured so as not to reflect the incoming radio wave outside the building again. As a material of the glass curtain wall, float transparent plate glass, heat ray reflective glass, radio wave transmission type high heat shielding heat ray reflective glass, etc., which are said to have a relatively high TV radio wave transmittance, are suitable.
[0012]
FIG. 3 shows the state of processing of TV radio waves at the opening 8 in the TV radio non-reflective building according to the present invention.
As shown in FIG. 3, first, the arrangement and orientation of the wall 9 in the building is taken into consideration for TV radio waves that have entered the building through the opening 8 located between the window stand and the beam. Thus, the traveling direction of the reflected wave is regulated, and the radio wave entering the building is diverged inside the building to reduce energy.
However, since the range of the building structure and its layout can naturally be determined, the range in which the traveling direction of the reflected wave can be regulated is limited. Is not perfect.
Accordingly, as shown in the figure, the electromagnetic wave absorbing panel 7 according to the present invention is provided as a second means for the incoming or reflected television radio waves whose direction cannot be regulated in the present invention, so that the television radio waves can be transmitted. It absorbs energy after absorption to reduce energy.
[0013]
FIG. 4 shows an embodiment in which a space shielded by electromagnetic waves is formed inside a building.
The television radio wave non-reflective building 1 according to the present invention adopts a center core system, and each room existing around the core portion 10 is shielded against electromagnetic waves.
The electromagnetic wave shielding chamber 11 on the side where the TV radio wave enters is disposed at a position close to the core portion 10 away from the wall, and the electromagnetic wave absorbing panel according to the present invention is placed on the outer wall surface 12 of the electromagnetic wave shielding chamber 11 as shown in the figure. 7, the electromagnetic wave absorbing panel 7 is stretched over the entire wall surface 13 of the core portion 10 so that the TV radio wave entering the inside of the building does not come out of the building again as a reflected wave.
The electromagnetic wave shielding room 14 placed on the other side that does not receive TV radio waves is partitioned over the entire floor so that it is possible to eliminate the difficulty of calling due to the complications of PHS, mobile phones, etc., introducing a system such as a wireless LAN. It can be adapted to.
In the present embodiment, the building is described as the center core system, but the core form is not limited to this, and the present invention can be applied to the case of both side cores, eccentric cores, and the like.
[0014]
As described above, the TV radio wave non-reflective building according to the present invention reflects the VHF and UHF wide-area TV radio waves in the building so that the building actively absorbs them and finishes the processing. It is a building that does not cause any obstacles.
Therefore, in the conventional idea, in a building that is configured to be able to secure an electromagnetic wave shielded space in the building, which has been considered difficult because the shielding material reflects the TV radio wave, it is a non-reflective TV radio wave building. is there.
[0015]
Next, an electromagnetic wave absorbing panel that greatly contributes to the formation of the above-described TV radio wave non-reflective building will be described with reference to FIGS.
FIG. 5 shows an embodiment of the electromagnetic wave absorption panel according to the present invention in a plane and a cross-sectional view.
The electromagnetic wave absorbing panel 7 is provided with an electromagnetic wave reflection plate 17 on the bottom 16 of the outer frame 15 constituting the entire structure. A rectangular parallelepiped ferrite 18 is arranged on the upper surface of the electromagnetic wave reflection plate 17 at a predetermined interval. In order to restrain from the upper surface, the holding member 19 is closed.
The outer frame 15 is in a state where no function is expected in terms of the function of absorbing electromagnetic waves, but it is desirable that the outer frame 15 is made of a non-metallic material and has fire resistance in order to avoid reflection of TV radio waves.
On the other hand, since the electromagnetic wave reflector 17 occupies a large position in electromagnetic wave absorption electromagnetically, it is essential to be made of metal, and at the same time, when a function as a support of the ferrite 18 is required. Needs to have the required thickness and strength, and when the function as a support for the ferrite 18 is provided separately, the electromagnetic wave reflector 17 may be thin, or a metal stay such as an aluminum foil may be used. Good.
[0016]
The holding member 19 is desirably non-metallic and fireproof, like the outer frame 15, and in addition to this, it is necessary to be made of a dry material that does not absorb moisture. This is because, if the holding member 19 absorbs water, the conductivity between the ferrites changes and the radio waves cannot be completely absorbed.
Therefore, as materials for the outer frame and the holding member, calcium silicate materials, gypsum boards, fiber reinforced concrete, ALC plates, and the like are being considered.
[0017]
The holding state of the holding member 19 and the ferrite 18 is mainly mechanically dense. However, regarding the manufacturing method thereof, the ferrite is inserted into the groove formed in the holding member or inside the mold. It is also possible to adopt a molding method in which the above-mentioned material is poured after the electromagnetic wave reflector with the ferrite attached thereto is disposed.
In the case of TV radio waves, since the radio waves are basically horizontally polarized, it is considered that the rectangular parallelepiped ferrite is arranged vertically, but we want to prevent reflection from vertical polarization due to other requirements. In some cases, the horizontal ferrite can be arranged behind the vertical ferrite so as to intersect or the ferrite can be integrally formed in a lattice shape.
[0018]
FIG. 6 shows another embodiment of the electromagnetic wave absorption panel according to the present invention in a plan view and a cross-sectional view in the direction of an arrow.
As in the example of FIG. 5, the electromagnetic wave absorbing panel 20 has a rectangular parallelepiped ferrite 24 arranged at predetermined intervals on the upper surface of the electromagnetic wave reflection plate 23 installed on the bottom 22 of the outer frame 21 constituting the entire structure. The holding member 25 is provided so as to be integrated with the outer frame 21 so as to fix the ferrite.
As for the materials of the outer frame, the holding member, etc., those satisfying the same conditions as in the example of FIG. 5 are appropriate.
[0019]
The electromagnetic wave absorption panel 30 shown in FIG. 7 is the simplest example composed of a ferrite and an electromagnetic wave reflection plate.
In this example, on the electromagnetic wave reflection plate 32 installed on the outer frame 31, the ferrite 33 is arranged and set solely by a fixing means such as adhesion, so that the periphery of the ferrite has an electromagnetic influence. This is an example in which the elements are removed and the design for efficiently absorbing TV radio waves is the easiest.
However, in this case, the outer frame 31 in contact with the lower surface of the electromagnetic wave reflecting plate is not attached to the electromagnetic wave absorbing panel 30 because both the ferrite and the electromagnetic wave reflecting plate do not have the fire resistance required for the building. This is an embodiment different from the above examples in this respect.
[0020]
In FIG. 8, the positional relationship between the electromagnetic wave reflection plate 32 and the ferrite 33 is shown as an example.
For example, when it is necessary to set the attenuation rate of TV radio waves to 20 to 25 dB, a rectangular parallelepiped ferrite 33 having a thickness W = 8 mm and a height H = 20 mm is placed on the electromagnetic wave reflection plate 32 with a spacing B = 20 mm. It has been experimentally confirmed that it is possible to cope with the arrangement.
However, these numerical values are never specified. For example, when the attenuation rate is set to 20 to 25 dB, the thickness W is 7 to 8 mm, the height H is 16 to 22 mm, and the interval B is 18 to Tests have shown that adjustment is possible with a width of about 20 mm.
[0021]
In the above setting, naturally, each value varies depending on the attenuation rate setting. For example, if the attenuation rate is 15 dB, both the ferrite size and the arrangement interval are sufficient. Since a small size can be used, an even smaller and lighter electromagnetic wave absorbing panel can be provided.
Therefore, when designing an electromagnetic wave absorption panel, it will be adjusted appropriately according to the measured radio wave environment in consideration of the selection of the area where the building is constructed and the plan of the place where the electromagnetic wave absorption panel is installed inside the building. .
[0022]
【The invention's effect】
The television radio wave non-reflective building according to the present invention and the electromagnetic wave absorbing panel used therefor basically have a glass curtain wall arranged on the outer wall of the four or more layers, and the window and beams on the indoor side and the indoor side. An electromagnetic wave absorbing panel for horizontally polarized waves is installed outside the room, and an electromagnetic wave absorbing panel for horizontally polarized waves is installed on the outside wall of the electromagnetic wave shielding room on the indoor wall with respect to the opening of the building where the glass curtain wall is arranged. to VHF, it is intended to absorb the television radio wave of UHF, single and electromagnetic wave reflecting plate over the entire surface of the panel, rectangular ferrite vertically and parallel arranged with a predetermined interval on the upper surface of the electromagnetic wave reflecting plate And the ferrite top surface is oriented in the direction of electromagnetic waves. By imbibing bi waves, even in buildings arranging the electromagnetic wave shielding room into the room, and effective not to cause radio wave reflecting. And, specifically, the electromagnetic wave absorption panel for horizontal polarization, and is characterized in that an electromagnetic wave shielding room building and be placed on the outside of the window sill and beams, electromagnetic wave absorption panel for horizontal polarization ferrite Since the gap and the upper surface of the ferrite are closed by the holding member of the fireproof structure, the handling and installation are easy and the effect of greatly contributing to the reduction of the total cost is exhibited.
[Brief description of the drawings]
FIG. 1 is a perspective view of a TV radio wave non-reflective building according to the present invention. FIG. 2 is a partial cross-sectional view of a glass curtain wall near a window sill and a beam. [Fig. 5] Electromagnetic wave absorbing panel diagram according to the present invention [Fig. 6] Other electromagnetic wave absorbing panel diagram according to the present invention [Fig. 7] Other electromagnetic wave absorbing panel diagram according to the present invention [Fig. 8] Ferrite Layout [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Television radio wave non-reflective building 2 High-rise part 3 Low-rise part 4 Glass curtain wall 5 Window stand 6 Beam 7, 20, 30 Electromagnetic wave absorption panel 8 Opening part 9 Wall 10 Core part 11 Electromagnetic wave shield room 12 Outer wall surface 13 Wall surface 14 Electromagnetic wave shield Chamber 15 Outer frame 16 Bottom portion 17 of outer frame Electromagnetic wave reflector 18 Ferrite 19 Holding members 20, 30 Electromagnetic wave absorbing panels 21, 31 Outer frame 22 Bottom portions 23, 32 of outer frame Electromagnetic wave reflectors 24, 33 Ferrite 25 Holding member

Claims (1)

A glass curtain wall is disposed on the outer wall of a high-layer part of four or more layers, and an electromagnetic wave absorbing panel for horizontal polarization is installed on the indoor side of the glass curtain wall and on the outside of the window and the beam on the indoor side. It is a wall on the indoor side with respect to the opening of the building where the curtain wall is arranged, and an electromagnetic wave absorbing panel for horizontal polarization is installed on the outer wall surface of the electromagnetic wave shielding room ,
The horizontally polarized electromagnetic wave absorbing panel is made from a single electromagnetic wave reflecting plate over the entire surface of the panel, the rectangular parallelepiped ferrite with a predetermined interval on the upper surface of the electromagnetic wave reflecting plate is vertically and parallel arrangement, the A TV radio wave non-reflective building characterized in that the ferrite upper surface is set in the direction of electromagnetic waves.

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