JP3629675B2 - Electromagnetic shielding system - Google Patents

Electromagnetic shielding system Download PDF

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Publication number
JP3629675B2
JP3629675B2 JP26072798A JP26072798A JP3629675B2 JP 3629675 B2 JP3629675 B2 JP 3629675B2 JP 26072798 A JP26072798 A JP 26072798A JP 26072798 A JP26072798 A JP 26072798A JP 3629675 B2 JP3629675 B2 JP 3629675B2
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Japan
Prior art keywords
electromagnetic shielding
electromagnetic
performance
mobile phone
jamming device
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Expired - Fee Related
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JP26072798A
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Japanese (ja)
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JP2000087659A (en
Inventor
石川敏行
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Shimizu Corp
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Shimizu Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/60—Jamming involving special techniques
    • H04K3/68—Jamming involving special techniques using passive jamming, e.g. by shielding or reflection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/80—Jamming or countermeasure characterized by its function
    • H04K3/84—Jamming or countermeasure characterized by its function related to preventing electromagnetic interference in petrol station, hospital, plane or cinema
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K2203/00—Jamming of communication; Countermeasures
    • H04K2203/10—Jamming or countermeasure used for a particular application
    • H04K2203/16—Jamming or countermeasure used for a particular application for telephony
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/40—Jamming having variable characteristics
    • H04K3/42—Jamming having variable characteristics characterized by the control of the jamming frequency or wavelength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/40—Jamming having variable characteristics
    • H04K3/45—Jamming having variable characteristics characterized by including monitoring of the target or target signal, e.g. in reactive jammers or follower jammers for example by means of an alternation of jamming phases and monitoring phases, called "look-through mode"

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Electromagnetism (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Public Health (AREA)
  • Building Environments (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、劇場、コンサートホール、会議室等の施設に好適に用いられる電磁シールドシステムに関する。
【０００２】
【従来の技術及び発明が解決しようとする課題】
劇場、コンサートホール、会議室等の施設では、周囲の建物で使用されるワイヤレスマイクの電波干渉の影響や、周囲の無線システムの雑音混入を防ぐため、建物に電磁シールドを施す場合が最近増加してきており、この場合の電磁シールドの必要性能は３０ｄＢ程度である。加えて、建物内への携帯電話などの着信を防ぐために必要な建物の電磁シールド性能は５０〜６０ｄＢ程度と高性能となり、電磁シールドにかかるコストが膨大となってしまう。劇場等に電磁シールドを施す場合には、特に扉部やダクト部などの開口部の電磁波シールド対策を十分に行わないと所定の性能が得られない。
【０００３】
一方で、最近、ジャミング装置という発信機（通常、携帯電話等通話抑制装置という）を設置することにより、設置点から半径３ｍ程度の領域に携帯電話を受信させない装置が考案され、法的に認可の方向にある。しかしながら、ジャミング装置のみで電話の着信を防止しようとして劇場等に適用する場合には、扉、ダクト、配管の電磁遮蔽層の貫通部が多いことから、非常に多数（例えば数１００）のジャミング装置を必要とするため、法的認可が必要であるとともにコストが増大し、配線も複雑になるという問題を有している。また、補聴器やペースメーカー利用者への配慮も必要になる。
【０００４】
本発明は、上記従来の問題を解決するものであって、電磁遮蔽の手間のかかる開口部の電磁シールド処理を簡略にした電磁シールド構造で高レベルの電磁波遮蔽性能を達成することができる電磁シールドシステムを提供することを目的とする。
【０００５】
【課題を解決するための手段】
上記目的を達成するために本発明の電磁シールドシステムは、壁、床及び天井を電磁シールド材で構成した建物において、ダクト、配管の貫通部に、携帯電話等と同一周波数の電波を部分的に発生させるジャミング装置を設置したことを特徴とする。
【０００６】
【発明の実施の形態】
以下、本発明に係る実施の形態を図面を参照しつつ説明する。図１は、本発明の電磁シールドシステムの１実施形態を示す構成図である。
【０００７】
図１において、劇場、コンサートホール、会議室等の施設の建物１の壁、床及び天井の各部位は、５０〜６０ｄＢ程度の電磁遮蔽性能が得られる鉄板などの電磁シールド材８で構成し、周囲の建物で使用されるワイヤレスマイクの電波干渉の影響や、周囲のＰＨＳの雑音混入を防ぎ電話の着信を防止するための電磁シールドが施されている。そして、空調機２に接続される空調ダクト３および出入口扉４などや、配線６、配管７などの電磁シールド材の開口部に近接してジャミング装置５を設置している。このジャミング装置５は、携帯電話等通話抑制装置といわれるもので、設置点から半径３ｍ程度の領域に携帯電話等と同一周波数の電波を発生させ、携帯電話等を受信させない装置である。
【０００８】
図２は、本発明におけるジャミング装置５の効果を説明するための図であり、開口部からの距離がＬｍ以内の受信可能範囲において、ジャミング装置の電界強度を携帯電話の電界強度よりも大にすることにより、携帯電話が掛からない状態を実現させることができる。
【０００９】
従来の建物では、５０〜６０ｄＢ程度の電磁遮蔽性能が得られる電磁シールド材で主要な構造部を施工し、一番の弱点となる開口部廻りをより充分に施工しても、開口部の性能の低さにより結果的に建物全体としては、３０ｄＢ程度の電磁波遮蔽性能しか得られない。
【００１０】
これに対して、壁、床および天井の電磁シールド構造と開口部に近接されるジャミング装置５を組み合わせることにより、開口部の電磁波遮蔽性能の低下を防止でき、５０〜６０ｄＢ程度の高性能の電磁波遮蔽が可能となる。
【００１１】
なお、上記実施の形態においては、５０〜６０ｄＢ程度の電磁波遮蔽性能を発揮する例について説明したが、３０ｄＢ程度の低レベルの電磁波遮蔽性能を必要とする場合にも、同様に開口部にジャミング装置を設けることで確実かつ容易にその性能を達成できる。
【００１２】
【発明の効果】
以上の説明から明らかなように、本発明によれば、低レベルの簡易電磁シールド構造（例えば、材料は鉄板などの板状のシールド材で単体で６０ｄＢ程度の性能が得られる材料を用いる）とジャミング装置を組み合わせることにより、携帯電話の着信防止を図ることができる。また、電磁シールドに一番手間がかかる開口部処理を不要にすることができ、低コストで高性能の電磁波遮蔽が可能となる。
【図面の簡単な説明】
【図１】本発明の電磁シールドシステムの１実施形態を示す構成図である。
【図２】本発明におけるジャミング装置の効果を説明するための図である。
【符号の説明】
１…建物
３…空調ダクト
４…扉
５…ジャミング装置
６…配線
７…配管
８…電磁シールド材[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electromagnetic shield system suitably used in facilities such as a theater, a concert hall, and a conference room.
[0002]
[Prior art and problems to be solved by the invention]
In facilities such as theaters, concert halls, and conference rooms, the use of electromagnetic shielding in buildings has recently been increasing to prevent the effects of radio interference from wireless microphones used in the surrounding buildings and the introduction of noise in the surrounding wireless systems. In this case, the required performance of the electromagnetic shield is about 30 dB. In addition, the electromagnetic shielding performance of the building required to prevent incoming calls such as mobile phones in the building is as high as about 50 to 60 dB, and the cost for electromagnetic shielding becomes enormous. When an electromagnetic shield is applied to a theater or the like, a predetermined performance cannot be obtained unless sufficient electromagnetic wave shielding measures are taken especially for openings such as doors and ducts.
[0003]
On the other hand, recently, by installing a transmitter called a jamming device (usually called a call suppression device such as a mobile phone), a device that does not receive a mobile phone within an area of about 3 m radius from the installation point has been devised and legally approved. In the direction of However, when it is applied to a theater or the like in order to prevent incoming calls only with a jamming device, there are many through portions of electromagnetic shielding layers of doors, ducts, and piping, so a very large number (for example, several hundreds) of jamming devices. Therefore, there is a problem that legal approval is required, costs increase, and wiring becomes complicated. In addition, consideration for hearing aids and pacemaker users is also necessary.
[0004]
The present invention solves the above-mentioned conventional problems, and can achieve a high level of electromagnetic shielding performance with an electromagnetic shielding structure that simplifies the electromagnetic shielding treatment of the opening that requires electromagnetic shielding. The purpose is to provide a system.
[0005]
[Means for Solving the Problems]
Electromagnetic shielding system of the present invention in order to achieve the above object, wall, in a building floor and ceiling and an electromagnetic shielding material, ducts, the penetration portion of the pipe, the electric wave of the same frequency as mobile phones partially A jamming device for generating is installed.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments according to the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram showing an embodiment of the electromagnetic shielding system of the present invention.
[0007]
In FIG. 1, each part of the wall, floor, and ceiling of the building 1 of a facility such as a theater, a concert hall, and a conference room is configured with an electromagnetic shielding material 8 such as an iron plate that can obtain an electromagnetic shielding performance of about 50 to 60 dB. An electromagnetic shield is provided to prevent the influence of radio wave interference of wireless microphones used in surrounding buildings and noise from surrounding PHS to prevent incoming calls. And the jamming apparatus 5 is installed in the vicinity of the opening part of electromagnetic shielding materials, such as the air-conditioning duct 3 connected to the air conditioner 2, the entrance door 4, etc., the wiring 6, and the piping 7. FIG. This jamming device 5 is called a call suppression device such as a mobile phone, and is a device that generates radio waves of the same frequency as a mobile phone or the like in an area having a radius of about 3 m from the installation point and does not receive the mobile phone or the like.
[0008]
FIG. 2 is a diagram for explaining the effect of the jamming device 5 according to the present invention. In the receivable range where the distance from the opening is within Lm, the electric field strength of the jamming device is made larger than the electric field strength of the mobile phone. By doing so, it is possible to realize a state in which the mobile phone does not make a call.
[0009]
In conventional buildings, even if the main structural part is constructed with an electromagnetic shielding material capable of obtaining an electromagnetic shielding performance of about 50 to 60 dB and the area around the opening, which is the weakest point, is more fully constructed, the performance of the opening As a result, only about 30 dB electromagnetic wave shielding performance can be obtained as a whole building.
[0010]
On the other hand, by combining the electromagnetic shielding structure of the wall, floor and ceiling with the jamming device 5 that is close to the opening, it is possible to prevent the electromagnetic shielding performance of the opening from being lowered, and the high-performance electromagnetic wave of about 50 to 60 dB. Shielding is possible.
[0011]
In the above-described embodiment, the example of exhibiting the electromagnetic shielding performance of about 50 to 60 dB has been described. However, when a low level electromagnetic shielding performance of about 30 dB is required, the jamming device is similarly provided in the opening. The performance can be achieved reliably and easily.
[0012]
【The invention's effect】
As apparent from the above description, according to the present invention, a low-level simple electromagnetic shield structure (for example, a plate-like shield material such as an iron plate is used and a material capable of obtaining a performance of about 60 dB alone) is used. By combining the jamming device, it is possible to prevent the incoming call of the mobile phone. In addition, it is possible to eliminate the need for the opening processing, which is the most troublesome for the electromagnetic shield, and it is possible to perform high-performance electromagnetic shielding at a low cost.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing an embodiment of an electromagnetic shield system of the present invention.
FIG. 2 is a diagram for explaining the effect of the jamming device according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Building 3 ... Air-conditioning duct 4 ... Door 5 ... Jamming device 6 ... Wiring 7 ... Piping 8 ... Electromagnetic shielding material

Claims (1)

壁、床及び天井を電磁シールド材で構成した建物において、ダクト、配管の貫通部に、携帯電話等と同一周波数の電波を部分的に発生させるジャミング装置を設置したことを特徴とする電磁シールドシステム。An electromagnetic shielding system in which a jamming device that partially generates radio waves of the same frequency as that of a mobile phone or the like is installed in a penetration part of a duct or pipe in a building having walls, floors, and ceilings made of electromagnetic shielding material .
JP26072798A 1998-09-16 1998-09-16 Electromagnetic shielding system Expired - Fee Related JP3629675B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26072798A JP3629675B2 (en) 1998-09-16 1998-09-16 Electromagnetic shielding system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26072798A JP3629675B2 (en) 1998-09-16 1998-09-16 Electromagnetic shielding system

Publications (2)

Publication Number Publication Date
JP2000087659A JP2000087659A (en) 2000-03-28
JP3629675B2 true JP3629675B2 (en) 2005-03-16

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Application Number Title Priority Date Filing Date
JP26072798A Expired - Fee Related JP3629675B2 (en) 1998-09-16 1998-09-16 Electromagnetic shielding system

Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111585689A (en) * 2019-02-15 2020-08-25 塔塔顾问服务有限公司 System and method for interrupting unauthorized communication in a low frequency radio communication device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111585689A (en) * 2019-02-15 2020-08-25 塔塔顾问服务有限公司 System and method for interrupting unauthorized communication in a low frequency radio communication device

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JP2000087659A (en) 2000-03-28

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