JPH05206947A - Optical communication system - Google Patents
Optical communication systemInfo
- Publication number
- JPH05206947A JPH05206947A JP4011230A JP1123092A JPH05206947A JP H05206947 A JPH05206947 A JP H05206947A JP 4011230 A JP4011230 A JP 4011230A JP 1123092 A JP1123092 A JP 1123092A JP H05206947 A JPH05206947 A JP H05206947A
- Authority
- JP
- Japan
- Prior art keywords
- transmission
- transmitting
- receiving
- satellite
- reception
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Landscapes
- Mechanical Light Control Or Optical Switches (AREA)
- Optical Communication System (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、オフィスや家庭などの
室内空間に設定される複数の端末装置間で光信号により
データ伝送を行う光空間伝送システムに関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical space transmission system for transmitting data by optical signals between a plurality of terminal devices set in an indoor space such as office or home.
【０００２】[0002]
【従来の技術】図３にオフィスにおいて用いられる従来
の光空間伝送システムを示す。この光空間伝送システム
は、パーソナルコンピュータやプリンタ等の端末装置１
に、データを光信号で送受信する送受信装置２を設ける
と共に、天井（あるいは壁の場合もある）に複数のサテ
ライト装置３を設置して構築してある。ここで、天井に
設定されたサテライト装置３は情報伝送ケーブルＬ0 に
より接続され、サテライト装置３間のデータ伝送を有線
方式で行っている。2. Description of the Related Art FIG. 3 shows a conventional optical space transmission system used in an office. This optical space transmission system includes a terminal device 1 such as a personal computer or a printer.
In addition to the transmitter / receiver 2 for transmitting / receiving data as optical signals, a plurality of satellite devices 3 are installed on the ceiling (or in some cases, a wall). Here, the satellite devices 3 set on the ceiling are connected by an information transmission cable L 0 , and data transmission between the satellite devices 3 is performed by a wire system.
【０００３】この光空間伝送システムでは、パーソナル
コンピュータなどの端末装置１からのデータを送受信装
置２がサテライト装置３に対して空間伝送により伝送
し、サテライト装置３が情報伝送ケーブルＬ0 を介して
相互にデータ伝送を行うと共に、夫々のサテライト装置
３が送受信装置２に対して空間伝送によりデータを伝送
して、各端末装置１間でデータ伝送が行われる。In this optical space transmission system, the transmission / reception device 2 transmits data from the terminal device 1 such as a personal computer to the satellite device 3 by space transmission, and the satellite device 3 mutually transmits via the information transmission cable L 0. In addition to the data transmission, each satellite device 3 transmits data to the transmitting / receiving device 2 by spatial transmission, and the data transmission is performed between the terminal devices 1.
【０００４】ここで、サテライト装置３では送受信装置
２との間で広範囲で送受信が可能となるように、複数の
発光素子及び受光素子を放射状に配置してある。一方、
送受信装置２においては、伝送距離を確保するために指
向角は絞ってある。Here, in the satellite apparatus 3, a plurality of light emitting elements and light receiving elements are radially arranged so that transmission / reception with the transmitting / receiving apparatus 2 can be performed in a wide range. on the other hand,
In the transmitter / receiver 2, the directivity angle is narrowed in order to secure the transmission distance.
【０００５】[0005]
【発明が解決しようとする課題】ところで、上記光空間
伝送システムにおいて、フロアが広く長距離伝送が必要
な場合には、光信号が減衰して良好なデータ伝送を行え
なくなるという問題がある。この点を改善する方法とし
ては、サテライト装置３の台数を増やすことが考えられ
る。しかし、このようにすると、コストアップとなって
しまう。また、送受信装置２側の送信パワーを大きくす
ることも考えられるが、そのためには発光素子を数を増
やすことが必要であり、形状、コスト及び消費電力の面
で問題がある。By the way, in the above-mentioned optical space transmission system, when a floor is wide and long-distance transmission is required, there is a problem that an optical signal is attenuated and good data transmission cannot be performed. As a method of improving this point, it is conceivable to increase the number of satellite devices 3. However, this would increase the cost. It is also conceivable to increase the transmission power on the transmitter / receiver 2 side, but for that purpose, it is necessary to increase the number of light emitting elements, and there are problems in terms of shape, cost, and power consumption.
【０００６】本発明は上述の点に鑑みて為されたもので
あり、その目的とするところは、サテライト装置の台数
を増加したり、送受信装置の送信パワーを上げたりする
ことなく、データ伝送距離を長くすることができる光空
間伝送システムを提供することにある。The present invention has been made in view of the above points, and an object of the present invention is to increase the data transmission distance without increasing the number of satellite devices or increasing the transmission power of transmitting / receiving devices. An object of the present invention is to provide an optical space transmission system capable of lengthening.
【０００７】[0007]
【課題を解決するための手段】本発明では、上記目的を
達成するために、送受信装置とで死角となる送受信面で
も光信号を送受信可能とする反射装置をサテライト装置
に設けてある。In the present invention, in order to achieve the above-mentioned object, a satellite device is provided with a reflecting device capable of transmitting / receiving an optical signal even on a transmitting / receiving surface which is a blind spot with the transmitting / receiving device.
【０００８】[0008]
【作用】本発明は、上述のように構成することにより、
サテライト装置側の送受信装置との間の光信号の送受信
効率を向上させ、サテライト装置の台数を増加したり、
送受信装置の送信パワーを上げたりしなくても、サテラ
イト装置と送受信装置との間の光信号のデータ伝送距離
が長くなるようにしたものである。The present invention has the above-mentioned configuration,
Improve the efficiency of transmitting and receiving optical signals to and from the transceiver device on the satellite device side, and increase the number of satellite devices,
The data transmission distance of the optical signal between the satellite device and the transmitting / receiving device is increased without increasing the transmission power of the transmitting / receiving device.
【０００９】[0009]
【実施例】図１乃至図５に本発明の一実施例を示す。本
実施例もオフィスで用いられる図３で説明した光空間伝
送システムを例として以下の説明を行う。送受信装置２
の送信部２ａは、図４に示すように、赤外線を発光する
発光素子２３と、端末装置１からのデータを光空間伝送
に適した信号に変換する（例えば、変調）などの処理を
行う信号処理部２１と、上記発光素子２３を駆動する駆
動回路２２と、上記発光素子２３の発する光を狭い幅の
光信号に変換する光学レンズ２４とで構成してある。1 to 5 show an embodiment of the present invention. The present embodiment will be described below by taking the optical space transmission system described in FIG. 3 used in an office as an example. Transceiver 2
As shown in FIG. 4, the transmitter 2a of the signal processing unit 2a converts the data from the light emitting element 23 that emits infrared rays and the terminal device 1 into a signal suitable for optical space transmission (for example, modulation). The processing unit 21, a drive circuit 22 for driving the light emitting element 23, and an optical lens 24 for converting the light emitted by the light emitting element 23 into an optical signal having a narrow width.
【００１０】この送受信装置２の受信部２ｂは、基本的
には、光信号を受光するピンフォトダイオードなどから
なる受光素子２５と、この受光素子２５の出力（電流信
号）を電圧信号に変換して増幅する受光回路２６と、こ
の受光回路２６の出力をデータに変換する（例えば、検
波）などの処理を行う信号処理部２７とで構成してあ
る。The receiving unit 2b of the transmitter / receiver 2 basically converts a light receiving element 25 formed of a pin photodiode for receiving an optical signal and an output (current signal) of the light receiving element 25 into a voltage signal. And a signal processing unit 27 that performs processing such as converting the output of the light receiving circuit 26 into data (for example, detection).
【００１１】サテライト装置３は、図５に示すように、
赤外線を発光する発光素子３４及び光信号を受光するピ
ンフォトダイオードなどからなる受光素子３５を複数備
え、上記複数の発光素子３４及び受光素子３５は夫々放
射状に配置し、広い領域に拡散して光信号を送信可能と
すると共に、広い領域からの光信号を受光可能としてあ
る。The satellite device 3 is, as shown in FIG.
A plurality of light receiving elements 35, each of which emits an infrared ray and a pin photodiode for receiving an optical signal, are provided. The plurality of light emitting elements 34 and the plurality of light receiving elements 35 are arranged radially, respectively, and diffused into a wide area to emit light. The signal can be transmitted and the optical signal from a wide area can be received.
【００１２】このサテライト装置３は、基本的には、上
記発光素子３４及び受光素子３５の他に、発光素子３４
を駆動する駆動回路３２と、受光素子３５の受光出力を
増幅し、この増幅出力から不要な周波数成分を除去し、
さらにこの出力を検波して波形整形する受光回路３３
と、受信された信号を他のサテライト装置３に送信する
と共に、他のサテライト装置３から送信された信号を送
受信装置１に光信号で送信させるという処理を行うマイ
クロプロセッサからなる信号処理部３１とで構成してあ
る。The satellite device 3 basically has a light emitting element 34 in addition to the light emitting element 34 and the light receiving element 35.
A drive circuit 32 for driving the light receiving element 35 and a light receiving output of the light receiving element 35 are amplified, and unnecessary frequency components are removed from the amplified output,
Further, the light receiving circuit 33 which detects this output and shapes the waveform.
And a signal processing unit 31 including a microprocessor that performs processing of transmitting the received signal to the other satellite device 3 and causing the transmitting / receiving device 1 to transmit the signal transmitted from the other satellite device 3 as an optical signal. It is composed of.
【００１３】上記本実施例の動作について説明する。端
末装置１から送受信装置２にデータが与えられると、送
受信装置２では信号処理部２１でそのデータを光空間伝
送に適した信号に変換し、駆動回路２２を制御して発光
素子２３を発光させ、サテライト装置３に対して光信号
を送信する。光信号が送信されたサテライト装置３で
は、受光素子３５の受光出力を受光回路３３が増幅し、
不要な周波数成分を除去し、検波すると共に波形整形す
る。この受信信号を受けた信号処理部３１ではその信号
を有線伝送に適した信号に変換して情報伝送ケーブルＬ
0 を介して他のサテライト装置３に信号伝送を行う。そ
して、夫々のサテライト装置３は、駆動回路３２を介し
て発光素子３４を駆動して、室内の全域にわたって拡散
させる形で各送受信装置２に対して上記送受信装置２か
ら送信されたと同一の光信号を送信する。The operation of this embodiment will be described. When data is given from the terminal device 1 to the transmitter / receiver 2, the signal processor 21 of the transmitter / receiver 2 converts the data into a signal suitable for optical space transmission, and controls the drive circuit 22 to cause the light emitting element 23 to emit light. , And transmits an optical signal to the satellite device 3. In the satellite device 3 to which the optical signal is transmitted, the light receiving circuit 33 amplifies the light receiving output of the light receiving element 35,
Unnecessary frequency components are removed, detection is performed and waveform shaping is performed. The signal processing unit 31 receiving this received signal converts the signal into a signal suitable for wired transmission and converts the signal into the information transmission cable L.
A signal is transmitted to another satellite device 3 via 0 . Then, each satellite device 3 drives the light emitting element 34 through the drive circuit 32 and diffuses the light in the entire area of the room so that the same optical signal as that transmitted from the transmitter / receiver device 2 is transmitted to each transmitter / receiver device 2. To send.
【００１４】この光信号は各送受信装置２の受光素子２
５で受光され、受光回路２６で電圧信号変換される共に
増幅され、信号処理部２７でデータに変換されて端末装
置１に送られる。そのデータを受けた適宜端末装置１で
はデータに基づいた処理が行われる。ところで、図３の
一方のサテライト装置３のようにフロアの端に設置され
ているとすると、このサテライト装置３では図中の斜線
で示す殆ど左半分しか光信号を送受信することができな
い。従って、このサテライト装置３では実質的に送受信
効率が低下し、これによりデータ伝送距離が短くなる。
なお、このような現象はサテライト装置３の設置箇所に
関係なく内包している。つまり、サテライト装置３がフ
ロアの中央であっても、特定の送受信装置２の設置方向
と反対側の送受信面は、その送受信装置２との間での光
信号の送受信には寄与しない。このため、サテライト装
置３は設置箇所に関係なく、送受信装置２との間での送
受信能力が十分に発揮されていないのである。This optical signal is received by the light receiving element 2 of each transmitter / receiver 2.
The light is received at 5, is converted into a voltage signal by the light receiving circuit 26, is amplified, is converted into data by the signal processing unit 27, and is sent to the terminal device 1. Upon receiving the data, the terminal device 1 appropriately performs processing based on the data. By the way, assuming that the satellite device 3 is installed at the end of the floor like the one satellite device 3 in FIG. 3, the satellite device 3 can transmit and receive an optical signal only in the left half of the hatched area in the figure. Therefore, in this satellite device 3, the transmission / reception efficiency is substantially reduced, which shortens the data transmission distance.
Note that such a phenomenon is included regardless of where the satellite device 3 is installed. That is, even if the satellite device 3 is located at the center of the floor, the transmission / reception surface on the side opposite to the installation direction of the specific transmission / reception device 2 does not contribute to transmission / reception of an optical signal with the transmission / reception device 2. For this reason, the satellite device 3 does not exhibit the sufficient transmission / reception capability with the transmission / reception device 2 regardless of the installation location.
【００１５】そこで、本実施例ではこの送受信に寄与し
ない送受信面においても送受信装置２との間で送受信が
行えるようにして、サテライト装置３における送受信効
率を向上させ、サテライト装置３と送受信装置２との間
の伝送距離を長くできるようにしたものである。このた
め、本実施例では図１に示す反射装置４をサテライト装
置３に設けてある。この反射装置３は、サテライト装置
３の半球状の送受信部３ａの回りに摺動自在に取り付け
られ、且つ送受信装置２からの光信号あるいはサテライ
ト装置３からの光信号を反射する反射部４ａを垂直面内
において回動自在（傾き角度を調整自在）としてある。Therefore, in the present embodiment, transmission / reception can be performed with the transmission / reception device 2 even on the transmission / reception surface that does not contribute to the transmission / reception, so that the transmission / reception efficiency in the satellite device 3 is improved, and the satellite device 3 and the transmission / reception device 2 are connected. The transmission distance between the two can be lengthened. For this reason, in this embodiment, the reflection device 4 shown in FIG. 1 is provided in the satellite device 3. The reflecting device 3 is slidably mounted around the hemispherical transmitting / receiving unit 3 a of the satellite device 3 and has a reflecting portion 4 a for reflecting an optical signal from the transmitting / receiving device 2 or an optical signal from the satellite device 3 vertically. It is rotatable in the plane (the tilt angle can be adjusted).
【００１６】例えば、そのサテライト装置３が図１
（ａ）に示すようにフロアの隅部に設置されるものであ
るとすると、反射装置４からの光信号が届かない送受信
部３ａの側、つまりは送受信装置２の設置方向と反対側
に位置させる。そして、送受信装置２からの光信号の送
信角度に応じて反射部４ａの角度を調節する。このよう
にすれば、サテライト装置３の特定の送受信装置２に対
しては死角となっていた送受信面でもその送受信装置２
との間で光信号の送受信が行えるので、つまりは多くの
発光素子３４及び受光素子３５がその送受信装置２との
送受信に寄与するので、サテライト装置３の送受信効率
が向上する。その結果、送受信装置２との伝送距離を長
くできる。For example, the satellite device 3 is shown in FIG.
Assuming that it is installed in the corner of the floor as shown in (a), it is located on the side of the transmitting / receiving unit 3a where the optical signal from the reflecting device 4 does not reach, that is, on the side opposite to the installation direction of the transmitting / receiving device 2. Let Then, the angle of the reflection section 4a is adjusted according to the transmission angle of the optical signal from the transmission / reception device 2. In this way, even if the transmitting / receiving surface of the satellite device 3 is a blind spot with respect to the specific transmitting / receiving device 2, that transmitting / receiving device 2
Since an optical signal can be transmitted and received between the satellite device 3 and the light emitting device 34, that is, many light emitting elements 34 and light receiving elements 35 contribute to the transmission and reception with the transmitting and receiving device 2, so that the transmitting and receiving efficiency of the satellite device 3 is improved. As a result, the transmission distance with the transmitter / receiver 2 can be increased.
【００１７】なお、上述の場合には１つの送受信装置２
との伝送距離を長くする場合の説明であったが、複数の
送受信装置２との間でも良好にデータ伝送が行えるよう
にする場合には、図２に示すように夫々の送受信装置２
との間の送受信効率を上げるために、複数の反射装置４
をサテライト装置３に設ければよい。In the above case, one transmitting / receiving device 2
Although the description has been made on the case of increasing the transmission distance to the transmission / reception devices, in order to perform favorable data transmission with the plurality of transmission / reception devices 2, as shown in FIG.
In order to increase the transmission / reception efficiency with the multiple reflection devices 4
May be provided in the satellite device 3.
【００１８】[0018]
【発明の効果】本発明は上述のように、送受信装置とで
死角となる送受信面でも光信号を送受信可能とする反射
装置をサテライト装置に設けてあるので、サテライト装
置側の送受信装置との間の光信号の送受信効率を向上さ
せ、サテライト装置の台数を増加したり、送受信装置の
送信パワーを上げたりしなくても、サテライト装置と送
受信装置との間の光信号のデータ伝送距離を長くするこ
とができる。As described above, according to the present invention, since the satellite device is provided with the reflecting device capable of transmitting and receiving the optical signal even on the transmitting and receiving surface which becomes a blind spot with the transmitting and receiving device, the reflecting device between the satellite device and the transmitting and receiving device is provided. To improve the optical signal transmission / reception efficiency and increase the data transmission distance of the optical signal between the satellite device and the transceiver device without increasing the number of satellite devices or increasing the transmission power of the transceiver device. be able to.
【図１】（ａ），（ｂ）は本発明の一実施例としてのサ
テライト装置の構造を示す説明図、及びその平面図であ
る。1A and 1B are an explanatory view and a plan view showing a structure of a satellite device as an embodiment of the present invention.
【図２】（ａ），（ｂ）は複数の送受信装置との送受信
効率を上げる場合のサテライト装置の平面図、及びその
動作説明図である。2A and 2B are a plan view of a satellite device and an operation explanatory diagram thereof in the case of improving transmission / reception efficiency with a plurality of transmission / reception devices.
【図３】光空間伝送システムのシステム構成図である。FIG. 3 is a system configuration diagram of an optical space transmission system.
【図４】送受信装置の回路構成を示すブロック図であ
る。FIG. 4 is a block diagram showing a circuit configuration of a transmission / reception device.
【図５】サテライト装置の回路構成を示すブロック図で
ある。FIG. 5 is a block diagram showing a circuit configuration of a satellite device.
１ 端末装置 ２ 送受信装置 ３ サテライト装置 ４ 反射装置 1 Terminal Device 2 Transmitter / Receiver Device 3 Satellite Device 4 Reflector Device
【手続補正書】[Procedure amendment]
【提出日】平成４年５月１８日[Submission date] May 18, 1992
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１５[Correction target item name] 0015
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１５】そこで、本実施例ではこの送受信に寄与し
ない送受信面においても送受信装置２との間で送受信が
行えるようにして、サテライト装置３における送受信効
率を向上させ、サテライト装置３と送受信装置２との間
の伝送距離を長くできるようにしたものである。このた
め、本実施例では図１に示す反射装置４をサテライト装
置３に設けてある。この反射装置４は、サテライト装置
３の半球状の送受信部３ａの回りに摺動自在に取り付け
られ、且つ送受信装置２からの光信号あるいはサテライ
ト装置３からの光信号を反射する反射部４ａを垂直面内
において回動自在（傾き角度を調整自在）としてある。Therefore, in the present embodiment, transmission / reception can be performed with the transmission / reception device 2 even on the transmission / reception surface that does not contribute to the transmission / reception, so that the transmission / reception efficiency in the satellite device 3 is improved, and the satellite device 3 and the transmission / reception device 2 are connected. The transmission distance between the two can be lengthened. For this reason, in this embodiment, the reflection device 4 shown in FIG. 1 is provided in the satellite device 3. The reflector 4 is slidably mounted around the hemispherical transmitter / receiver 3 a of the satellite device 3 and has a vertical reflector 4 a for reflecting an optical signal from the transmitter / receiver 2 or an optical signal from the satellite device 3. It is rotatable in the plane (the tilt angle can be adjusted).
Claims (1)
データを光信号で送受信する送受信装置を夫々設け、こ
れら送受信装置が天井などの造営面に設置されたサテラ
イト装置を介して光空間伝送によりデータ伝送を行っ
て、複数の端末装置間のデータ伝送を行う光空間伝送シ
ステムにおいて、送受信装置とで死角となる送受信面で
も光信号を送受信可能とする反射装置をサテライト装置
に設けて成ることを特徴とする光空間伝送システム。1. Each terminal device installed in the same space,
Transmitters for transmitting and receiving data with optical signals are provided respectively, and these transmitters and receivers perform data transmission by optical space transmission via satellite devices installed on a construction surface such as a ceiling, thereby transmitting data between a plurality of terminal devices. In the optical space transmission system to be performed, the satellite device is provided with a reflecting device capable of transmitting and receiving an optical signal even on a transmitting and receiving surface which becomes a blind spot with the transmitting and receiving device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4011230A JPH05206947A (en) | 1992-01-24 | 1992-01-24 | Optical communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4011230A JPH05206947A (en) | 1992-01-24 | 1992-01-24 | Optical communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05206947A true JPH05206947A (en) | 1993-08-13 |
Family
ID=11772145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4011230A Withdrawn JPH05206947A (en) | 1992-01-24 | 1992-01-24 | Optical communication system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05206947A (en) |
-
1992
- 1992-01-24 JP JP4011230A patent/JPH05206947A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19990408 |