JPH0699973B2 - Electromagnetic shield method of intelligent building - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an electromagnetic shielding method for an intelligent building suitable for adopting a wireless network system.

[Conventional technology]

Generally, in intelligent buildings, information communication facilities such as complex electronic exchanges and computers are shared, and information communication with the inside and outside of the building is carried out, but with increasing value sense of information, diversification of information needs, individualization, Providing faster and more accurate information in the future building 1
There are two major challenges. Information networks based on a data highway method using optical fiber cables or coaxial cables have been studied and proposed as solutions to such problems in intelligent buildings.

[Problems to be solved by the invention]

However, in the data highway method that uses optical fiber cables and coaxial cables, it is necessary to stretch the optical fiber cables and coaxial cables to every corner (terminal equipment) in the intelligent building, and the construction cost and construction period are due to the cable laying. It will take that much extra.

If you use radio waves, you do not need to lay cables, but in this case, on the other hand, noise radio waves are emitted to the outside,
At the civilian level, practical use of a frequency band up to 50 GHz will be sufficient, but up to 3 THz will be subject to regulations under the Radio Law. On the other hand, there arises a problem that the system malfunctions due to external radio waves, internal TV intermediate frequency, radio microphone radio waves, and the like.

The present invention is based on the above invention, and an object of the present invention is to provide an electromagnetic shield method for an intelligent building capable of performing information communication by using radio waves of any frequency in a wide frequency band.

[Means for solving problems]

Therefore, the present invention is an electromagnetic shielding method for an intelligent building in which a PC version in which a mesh is embedded constitutes the outer wall of a building, and the mesh in the PC version is electrically connected to a stop on the frame to thereby intervene the stop. PC on the upper and lower floors
It is characterized by electrically connecting the mesh in the plate and grounding the mesh in the PC plate on the bottom floor.

[Action]

In the electromagnetic shielding method of the intelligent building of the present invention, the mesh is embedded in the PC plate constituting the building outer wall, and the mesh is electrically connected to the stopper of the frame and the PC plates on the upper and lower floors are electrically connected and grounded. Therefore, it is possible to secure the electromagnetic shield performance on the outer wall of the entire building.

〔Example〕

 Hereinafter, embodiments will be described with reference to the drawings.

FIG. 1 is a diagram for explaining one embodiment of an electromagnetic shield method for an intelligent building according to the present invention, where 1 is a PC
A plate, 2 is a lead wire, 3 is a fastener, 4 is a slab, and 5 is a mesh.

In FIG. 1, a PC (Precast Concrete) version 1 is one in which a mesh 5 is embedded and a conducting wire 2 is drawn from this mesh 5, and is attached to a slab 4 by using a fastener 3. The fastener 3 is a stopper for fixing the PC plate 1 which is fixed to the slab 4 with bolts or the like and becomes an outer wall,
For example, it is composed of an L-shaped member as illustrated.
Therefore, when attaching the PC plate 1 to this slab 4, the conductor 2
To the fasteners 3, and the meshes 5 of the upper and lower PC plates 1 are electrically connected via the fasteners 3. Then, by setting the mesh 5 of the PC version 1 on the bottom floor to the ground, the mesh 5 of the PC version 1 covering the building
The electromagnetic shielding performance can be improved by putting all of them in the ground.

FIG. 2 is a diagram for explaining an example of an intelligent building provided with an electromagnetic shield according to the present invention, 11 is a skeleton,
12-1 to 12-n are EPSs (pipe shafts for electric equipment), 13 is a coaxial cable, 14 is a branching device, 15 is a leaky coaxial cable, 16 is a ground plate, and 17 is a pile.

In the intelligent building shown in FIG. 2, an electromagnetic shield is provided on the skeleton 11 as shown by the dotted line in FIG. By connecting to a branching device (14) and coupling with a coaxial cable (13), by using radio waves, communication can be performed between communication devices arranged on each floor without laying a cable. The coaxial cable 13 is
It can be used in combination with those for television co-listening through EPS 12-1 to 12-n. In this way, the electromagnetic shield is
Since it does not emit noise to the outside by applying to, in the intelligent building, it will be possible to freely use radio waves in the frequency band regulated by the Radio Law. That is, it is possible to use radio waves in any frequency band that is economically advantageous and easy to use without being restricted by the Radio Law.

Also, even if the electromagnetic shielding performance of the body is secured, the building has openings in the body such as doorways and windows,
Radio waves will leak from here. Therefore, it is necessary to apply an electromagnetic shield to these openings as well. As a countermeasure against this, for example, a revolving door method or a double door is used at the entrance and exit, and energy is attenuated by utilizing straightness of high frequency between the first door and the second door, or an interlock method is used. The door may be closed, and the window may be made of glass with mesh in the window, conductive tape, film or the like for energy saving. By doing so, it is possible to prevent radio waves from entering and exiting through the entrance and exit, and improve the electromagnetic shielding performance of the entire intelligent building.

There are other ducts as the openings of the skeleton, but electromagnetic shielding performance can be secured by using a metal mesh in the filter part for this duct, and there are gaps. With respect to the above, the electromagnetic shielding performance can be further enhanced by using a packing such as a conductive rubber or a conductive brush, and an appropriate method may be adopted for these portions.

The present invention can be modified in various ways and is not limited to the above-mentioned embodiments. For example, instead of the method of pulling out the conductive wire from the mesh embedded in the PC plate, the embedded bolt and the mesh used for connecting to the fastener in the factory may be electrically connected in advance.

〔The invention's effect〕

As is clear from the above description, according to the present invention, the structure is provided with an electromagnetic shield to enable communication using radio waves of an arbitrary frequency in an intelligent building.
Communication can be performed using a wide frequency band, and the number of communication lines can be increased infinitely. Further, since it is not necessary to lay a communication cable, the intelligent building can be easily constructed and the construction cost can be reduced. In addition, since the electromagnetic shielding performance is secured by the mesh embedded in the PC version, on-site work becomes easier and the construction period and construction cost can be shortened.

[Brief description of drawings]

FIG. 1 is a diagram for explaining one embodiment of an electromagnetic shielding method for an intelligent building according to the present invention, and FIG. 2 is a diagram for explaining an example of an intelligent building provided with an electromagnetic shield according to the present invention. 1 ... PC version, 2 ... conductor wire, 3 ... fastener, 4 ... slab, 5 ...
mesh.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Yoshifumi Hoshida 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Takeshi Takahashi 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor, Yoko Morii 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (56) Bibliography Sho 61-140011 (JP, U)

Claims (1)

[Claims] 1. An electromagnetic shield method for an intelligent building in which a building outer wall is constructed by a PC plate with a mesh embedded therein, wherein the mesh in the PC plate is electrically connected to a stopper of a skeleton through the stopper. An electromagnetic shield method for intelligent buildings, characterized by electrically connecting the meshes in the upper and lower PC versions and grounding the mesh in the lowest PC version.