JPS6025334A - Optical communication device for spatial transmission - Google Patents
Optical communication device for spatial transmissionInfo
- Publication number
- JPS6025334A JPS6025334A JP58133958A JP13395883A JPS6025334A JP S6025334 A JPS6025334 A JP S6025334A JP 58133958 A JP58133958 A JP 58133958A JP 13395883 A JP13395883 A JP 13395883A JP S6025334 A JPS6025334 A JP S6025334A
- Authority
- JP
- Japan
- Prior art keywords
- optical communication
- light
- optical
- signal
- communication device
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/1149—Arrangements for indoor wireless networking of information
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
- G11B5/85—Coating a support with a magnetic layer by vapour deposition
Landscapes
- Engineering & Computer Science (AREA)
- Computing Systems (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
この発明は、たとえば同一室内における複数個の機器間
でデータ伝法する場合に用いることができる空間伝送光
通信装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a space transmission optical communication device that can be used, for example, to transmit data between a plurality of devices in the same room.
従来例の構成とその問題点
一般に室内の機器間でデータを伝送する際には第１図に
示すように室内の天井に空間伝送光通信装置１を設置し
、この空間伝送光通信装置１とたトエばコンビ二一タで
ある機器３ｄとがケーブル４で結ばれる。また空間伝送
光通信装置２８〜２Ｃは機器３３〜３Ｃとそれぞれ短い
ケーブルで結ばれ、機器３８〜３Ｃの近傍に置かれる。Conventional configuration and its problems Generally, when transmitting data between indoor devices, a space transmission optical communication device 1 is installed on the ceiling of the room as shown in Fig. 1, and the space transmission optical communication device 1 and A cable 4 connects the device to a device 3d, which is a combi-station. Further, the space transmission optical communication devices 28-2C are connected to the devices 33-3C by short cables, respectively, and placed near the devices 38-3C.
これらの機器３３〜３Ｃはたとえばプリンタ、 ＣＲＴ
、キーボード等である。空間伝送光通信装置１から空
間伝送光通信装置２８〜２Ｃへは搬送波周波数ｆ工の光
信号５によりデータが伝送され、空間伝送光通信装置２
３〜２Ｃから空間伝送光通信教ｆｉ １へは周波数ｆ工
と異なる搬送波周波ｕ、ｆ２の光信号６によシデータが
伝送され、双方向通信がおこなわれている。These devices 33 to 3C are, for example, printers, CRTs, etc.
, keyboard, etc. Data is transmitted from the space transmission optical communication device 1 to the space transmission optical communication devices 28 to 2C using the optical signal 5 of the carrier frequency f, and the space transmission optical communication device 2
Data is transmitted from 3 to 2C to the space transmission optical communication system fi 1 using optical signals 6 having carrier frequencies u and f2 different from the frequency f, and bidirectional communication is performed.
ところが、この空間伝送光通信装置は、たとえば空間伝
送光通信装置２ａ、２Ｌｒの間では通信がおこなえない
など特定の相手しか通信できないという問題があった。However, this space transmission optical communication device has a problem in that only a specific party can communicate, for example, communication cannot be performed between the space transmission optical communication devices 2a and 2Lr.
さらに空間伝送光通信装置１゜２ａ〜２Ｃは搬送周波数
の違いにより２機種必要であるという問題があった。Furthermore, there is a problem in that two types of space transmission optical communication devices 1.degree. 2a to 2C are required due to differences in carrier frequencies.
発明の目的
この発明は、このような従来の欠点を除去するものであ
シ、たとえば同一室内の空間伝送光通信装置間で任意の
相手と通信できる優れた空間伝送光通信装置を提供する
ものである。Purpose of the Invention The present invention aims to eliminate such conventional drawbacks, and to provide an excellent space transmission optical communication device that can communicate with any other party between space transmission optical communication devices in the same room. be.
発明の１１り成
この発明の空間伝送光通信装置は、たとえば入力ディジ
クル信号により変調をおこなうとともに発光素子を駆動
する送光器とともにこの送光器により駆動されて光信号
を空間に発する発光素子とを含む光送信装置と、前記送
光器と前記発光素子の接続を断続する第１のスイッチと
、空間を伝播してきた光信号を電気（＋ｉ号に変換する
受光素子とともに受光素子からの電気信号を増幅し復調
する受光器とを含む光受信装置と、前記受光素子と前記
受光器の接続を断続する第２のスイッチと、前記送光器
の入力ディジタル信号の有無を検出する嬉１の検出器と
、前記受光器の出力ディジタル信号の有無を検出する第
２の検出器と、第１の検出器と第２の検出器の出力を入
力として演算をおこなう演算器と、この演算器の出力に
より第１のスイッチと第２のスイッチを開閉する切換器
を具備し、前記発光素子よシ発する光信号の搬送波周波
数と前記受光素子が受光する光信号の搬送波周波数が同
一であり、前記第１の検出器が入力ディジタル信号がな
いことを検出したとき、あるいは第１の検出器が入力信
号があることを検出し＠２のスイッチが閉であ）しかも
第２の検出器が出力信号があることを検出したときは第
２のスイッチのみを閉じ、それ以外のときは第１のスイ
ッチのみを閉じるようにしたことを特徴とするものであ
ムこのように構成したため、ｋとえは同一室内の複数の
空間伝送光通信装置間で任意の相手と通信できる。11 Constituents of the Invention The space transmission optical communication device of the present invention includes, for example, a light transmitter that modulates with an input digital signal and drives a light emitting element, and a light emitting element that is driven by the light transmitter to emit an optical signal into space. a first switch that connects and disconnects the light transmitter and the light emitting element, a light receiving element that converts the optical signal propagated through space into electricity (+i), and an electrical signal from the light receiving element. an optical receiving device including a light receiver that amplifies and demodulates the light, a second switch that connects and disconnects the light receiving element and the light receiver, and a second switch that detects the presence or absence of an input digital signal of the light transmitter; a second detector for detecting the presence or absence of the output digital signal of the light receiver; an arithmetic unit that performs calculations using the outputs of the first detector and the second detector as input; and an output of the arithmetic unit. a switch for opening and closing a first switch and a second switch, wherein the carrier frequency of the optical signal emitted from the light emitting element and the carrier wave frequency of the optical signal received by the light receiving element are the same; when the first detector detects that there is no input digital signal, or when the first detector detects that there is an input signal and the switch @2 is closed) and the second detector has an output signal. The feature is that only the second switch is closed when a problem is detected, and only the first switch is closed at other times. It is possible to communicate with any party between multiple space transmission optical communication devices.
実施例の説明
この発明の一実施例を第２図ないし第４図に示す。第２
図に示すように入力端子７より送光器８へ入力するディ
ジタル信号の有無を第１の検出器１０で検出し、受光１
Ｂ１５の出力すなわち受光ディジタル信号の有無を第２
の検出器１３で検出し、検出器１０．１３の出力を演算
器１１に入力し、演算器１１の出力−より切換器１２を
動作させて第１および第２のスイッチ１７８ 、１７ｂ
を開閉する。DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention is shown in FIGS. 2 to 4. Second
As shown in the figure, the first detector 10 detects the presence or absence of a digital signal input from the input terminal 7 to the light transmitter 8, and the light receiver 1
The output of B15, that is, the presence or absence of the received digital signal is determined by the second
The output of the detector 10.13 is input to the calculator 11, and the output of the calculator 11 operates the switch 12 to switch the first and second switches 178, 17b.
Open and close.
９は送光器８により駆動される発光素子、１６は受光器
１５に風気信号を入力する受光素子であシ、両者は同一
の光信号の搬送周波数をもつ。9 is a light emitting element driven by the light transmitter 8; 16 is a light receiving element that inputs a wind signal to the light receiver 15; both have the same optical signal carrier frequency.
演算器１１の具体的な回路を第３図に示す。すなわち、
入力端子２３は第１の検出器１０の出力に接続され、入
力端子２１は第２の検出器１３の出力に接続され、出力
端子２２は切換器１２の入力に接続されている。検出器
１０．１３はディジタル１３号があるときはＩ（レベル
、ないときはＬレベルを出力する。この回路は、入力端
子２３がＬレベルのトキインパータ１８およびオアゲー
ト２０により出カー喘子２２はＨレベルとなる。また出
力端子２２がＨレベルで入力端子２３．２１ともにＨレ
ベルのトキはアンドゲート１９がＨレベルトなるので出
力端子２２はＨレベルのまま変わらない。その池のとき
は出力端子２２はＬレベルである。そして出力端子２２
がＨレベルのとき切換器１２により嬉２のスイッチ１７
ｂのみが閑とをジ、出力端子２２がＬレベルのときは第
１のスイッチ１７ａのみが閉となる。このようにすると
、第２図において入力ディジタル信号および受光ディジ
タル信号ともにな−ときは、第２のスイッチ１７ｂが閉
のため受光状態にあｐ、この状態で受光ディジタル信号
が発生したときはただちに第２図の出力端子１４に情報
を出力できる。また入力ディジタル信号および受光ディ
ジタル信号ともにない受光状態の場合で、入力ディジタ
ル信号が発生したときはただちに切換器１２によシ瀉１
のスイッチ１７ａが閉になるので送光状態に変わるので
入力信号を光信号として送れる。この入力ディジクル信
号がなくなれば、また受光状態に復帰する。そして受光
ディジタル信号があって受光状態のときに入力ディジタ
ル信号が発生し女ときは、演算器１１は１ルベル
前記演算器１１より、入力ディジタル信号があって送光
状すのときに受光信号が伝播してきても、アントゲ−）
１９’ｌ′ｉＬレベルを継続するので送光状態を保つ。A specific circuit of the arithmetic unit 11 is shown in FIG. That is,
The input terminal 23 is connected to the output of the first detector 10 , the input terminal 21 is connected to the output of the second detector 13 , and the output terminal 22 is connected to the input of the switch 12 . The detector 10.13 outputs I (level) when digital number 13 is present, and outputs L level when it is not present. In addition, when the output terminal 22 is at the H level and both the input terminals 23 and 21 are at the H level, the AND gate 19 goes to the H level, so the output terminal 22 remains at the H level. is at L level.Then, the output terminal 22
When is at H level, switch 12 of switch 17
Only the first switch 17a is closed when the output terminal 22 is at the L level. In this way, when both the input digital signal and the received light digital signal are present in FIG. Information can be output to the output terminal 14 shown in FIG. In addition, in the case of a light reception state in which neither an input digital signal nor a light reception digital signal is present, when an input digital signal is generated, the switch 12 immediately switches the
Since the switch 17a is closed, the state changes to a light transmitting state, so that the input signal can be transmitted as an optical signal. When this input digital signal disappears, the light receiving state is restored again. Then, when there is a received digital signal and the light is in the light receiving state, an input digital signal is generated. Even if it spreads, it's an anime game)
Since it continues at the 19'l'iL level, the light transmission state is maintained.
つぎに、この実施例による室内データ伝送を第４図によ
って説明する。空［１１］伝送光通信装置２６８〜２６
ｄは機器２７８〜２７ｄとそれぞれ短込ケーグルで結ば
れ、それぞれの機器２７１〜２７ｄの近傍に図のように
置かれる。空間伝送光通信装置２６ａから空間伝送光通
信袋ｆＲ ２６ｂ〜２６ｄへは搬送波周波数ｆ３の光信
号２５が天井，壁などに反射して、データが伝送される
。空間伝送光通信装置２６ｂ〜２６ｄが光信号２５を受
光すると、第３図の演算器１工によシ送光できなくなる
。この光信号２５が停止した後、たとえば空間伝送光通
信装置２６ｂがら空間伝送光通信袋Ｒ ２６ａ 、 ２
６ｃ 、 ２６ｄ ヘは光信号２５と同−搬送波層ｅ数
ｆ３の光信号２４が天井，壁などに反射してデータが伝
送される。空間伝送光通信装置２６ａ 、 ２６Ｃ，
２６ｄがその光信号２４を受光すると、第３図の演算器
１１により送光できなくなる。そして、光信号２４が停
止した後、送光できるようになる。Next, indoor data transmission according to this embodiment will be explained with reference to FIG. Sky [11] Transmission optical communication equipment 268-26
d is connected to each of the devices 278 to 27d with a short cable cable, and placed near each of the devices 271 to 27d as shown in the figure. Data is transmitted from the space transmission optical communication device 26a to the space transmission optical communication bags fR 26b to 26d by reflecting the optical signal 25 of carrier wave frequency f3 from the ceiling, walls, etc. When the space transmission optical communication devices 26b to 26d receive the optical signal 25, the arithmetic unit 1 shown in FIG. 3 cannot transmit the light. After this optical signal 25 stops, for example, the space transmission optical communication bag R 26a, 2 is transmitted from the space transmission optical communication device 26b.
6c and 26d, the optical signal 24 of the same carrier layer e number f3 as the optical signal 25 is reflected on the ceiling, wall, etc., and data is transmitted. Space transmission optical communication devices 26a, 26C,
When 26d receives the optical signal 24, the arithmetic unit 11 in FIG. 3 disables the light transmission. After the optical signal 24 stops, light transmission becomes possible.
このように、光信号の搬送波周波数がどの空間伝送光通
信装置２６ｆｉ〜２６ｄでも同一であるため、任意の空
間伝送光通信装置がら任意の空間伝送光通信装置へのデ
ータ伝送ができるものである。また、ある空間伝送光通
信装置から送光されているときに他の空間伝送光通信装
置からは送光できないため混信が生じなー。さらにある
空ＩＭ】伝送光通信装置から送光されているときに、天
井，壁などに反射して同一の空間伝送光通信装置に光信
号が返ってきても、ｊｊｇａ図の演算器１１により受光
するおそれはない。In this way, since the carrier wave frequency of the optical signal is the same in any of the space transmission optical communication devices 26fi to 26d, data can be transmitted from any space transmission optical communication device to any space transmission optical communication device. Also, when light is being transmitted from one space transmission optical communication device, it cannot be transmitted from another space transmission optical communication device, so interference does not occur. Furthermore, when light is being transmitted from a space transmission optical communication device, even if the optical signal is reflected off a ceiling, wall, etc. and returns to the same space transmission optical communication device, the light is not received by the arithmetic unit 11 in the jjga diagram. There is no risk of it happening.
発明の効果
以上のように、この発明は、送光搬送波と受光搬送波の
周波数が同一であり、受光ディジタン信号の有無と入力
ディジタル信号の有無を検出し、入力ディジタμ信号が
ないときあるいは受光中で受光ディジタル信号と入力デ
ィジタμ信号があるときは受光状態を保ち、それ以外の
ときは送光状態にする構成としたため、たとえば同一室
内にある任意の空間伝送光通信装置間でのデータ伝送が
可能であり、しかも一種類の１種でそれが可能であシ、
実用上きわめて有利であるという効果がある。Effects of the Invention As described above, the present invention has the same frequency as the transmitting carrier wave and the receiving carrier wave, detects the presence or absence of the received digital signal and the presence or absence of the input digital signal, and detects the presence or absence of the received digital signal and the presence or absence of the input digital signal. When there is a received digital signal and an input digital μ signal, the light receiving state is maintained, and otherwise the light transmitting state is set, so that, for example, data transmission between arbitrary spatial transmission optical communication devices in the same room is possible. It is possible, and it is possible with only one kind,
This has the effect of being extremely advantageous in practice.
第１図は従来の室内における空間伝送光通信装置を用い
たデータ伝送を示す構成図、第２図はこの発明の一実施
例による空間伝送光通信装置のブロック図、第３図はそ
の演算器の詳細回路図、第４１図はこの空間伝送光通信
装置を用いたデータ伝送を示す溝成南である。
８・・・送光器、９・・・発光不予、１０・・・第１の
検出器、１１・・・演算器、１２・・・切換器、１３・
・・第２の検出器、１５・・・受光器、１６・・・受光
素子、２６ｎ〜２６ｄ・・・空間伝送光通信装置
第 １１−
１２（りFIG. 1 is a block diagram showing data transmission using a conventional indoor space transmission optical communication device, FIG. 2 is a block diagram of a space transmission optical communication device according to an embodiment of the present invention, and FIG. 3 is its computing unit. The detailed circuit diagram of FIG. 41 is a diagram showing data transmission using this spatial transmission optical communication device. 8... Light transmitter, 9... Unexpected light emission, 10... First detector, 11... Arithmetic unit, 12... Switch, 13...
...Second detector, 15... Light receiver, 16... Light receiving element, 26n to 26d... Space transmission optical communication device No. 11-12 (ri)
Claims (1)
と同一の光受信装置と、前記光送信装置の入力信号の有
無を検出する第１の検出器と、前記光受信装置の出力信
号の有無を検出する第２の検出器と、ｔ６ｉＪ記うｊ）
ｌおよび第２の検出器の出力を入力とした演算２号と
、この演３７１器の出力によりｎｉＪ記光送光送信装置
び光受信装置の送信受信動作を切換える切換器とを備え
Ｓ ｔｔｉＪ記演算器は前記光送信装置の入力信号がな
いときおよび前記光受信装置の出力信号がある場合で前
記入力信号があるときに前記光受信装置が受信動作状態
にあり、その他の場合に光送信装置１ｔが送信動作状態
となるように前記切換器を制御したこと全特徴とする空
間伝送光通信装置。an optical transmitter, an optical receiver whose optical signal has the same carrier frequency as that of the optical transmitter, a first detector that detects the presence or absence of an input signal of the optical transmitter, and an optical receiver that detects the presence or absence of an input signal of the optical receiver; a second detector for detecting the presence or absence;
The S ttiJ system is equipped with an arithmetic operation No. 2 that takes the outputs of the optical transmitter and the second detector as inputs, and a switch that switches the transmission/reception operation of the optical transmitter and the optical receiver according to the output of the operator. The arithmetic unit operates when there is no input signal to the optical transmitter and when there is an output signal from the optical receiver, and when the input signal is present, the optical receiver is in a receiving operation state, and in other cases, the optical transmitter 1. A space transmission optical communication device characterized in that the switching device is controlled so that 1t is in a transmitting operation state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58133958A JPS6025334A (en) | 1983-07-21 | 1983-07-21 | Optical communication device for spatial transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58133958A JPS6025334A (en) | 1983-07-21 | 1983-07-21 | Optical communication device for spatial transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6025334A true JPS6025334A (en) | 1985-02-08 |
Family
ID=15117052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58133958A Pending JPS6025334A (en) | 1983-07-21 | 1983-07-21 | Optical communication device for spatial transmission |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6025334A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62110340A (en) * | 1985-11-08 | 1987-05-21 | Nec Corp | Space propagation light communication system |
| JPH01174134A (en) * | 1987-12-14 | 1989-07-10 | Hm Electron Inc | Short distance radio optical communication equipment |
| EP0370680A2 (en) * | 1988-11-14 | 1990-05-30 | Photonics Corporation | Infrared transmitter apparatus |
| JP2017220872A (en) * | 2016-06-09 | 2017-12-14 | キヤノン株式会社 | Signal transmission equipment, signal transmission system, and apparatus |
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|---|---|---|---|---|
| JPS51113524A (en) * | 1975-03-31 | 1976-10-06 | Advantest Corp | Data transfer controlling system |
| JPS53123601A (en) * | 1977-04-04 | 1978-10-28 | Mitsubishi Electric Corp | Data transmission system |
| JPS5710551A (en) * | 1980-06-21 | 1982-01-20 | Agency Of Ind Science & Technol | Transmission system of optical information |
-
1983
- 1983-07-21 JP JP58133958A patent/JPS6025334A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51113524A (en) * | 1975-03-31 | 1976-10-06 | Advantest Corp | Data transfer controlling system |
| JPS53123601A (en) * | 1977-04-04 | 1978-10-28 | Mitsubishi Electric Corp | Data transmission system |
| JPS5710551A (en) * | 1980-06-21 | 1982-01-20 | Agency Of Ind Science & Technol | Transmission system of optical information |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62110340A (en) * | 1985-11-08 | 1987-05-21 | Nec Corp | Space propagation light communication system |
| JPH01174134A (en) * | 1987-12-14 | 1989-07-10 | Hm Electron Inc | Short distance radio optical communication equipment |
| EP0370680A2 (en) * | 1988-11-14 | 1990-05-30 | Photonics Corporation | Infrared transmitter apparatus |
| JP2017220872A (en) * | 2016-06-09 | 2017-12-14 | キヤノン株式会社 | Signal transmission equipment, signal transmission system, and apparatus |
| CN109314571A (en) * | 2016-06-09 | 2019-02-05 | 佳能株式会社 | Signal transmitting apparatus, signal transmission system and instrument |
| US20190097683A1 (en) * | 2016-06-09 | 2019-03-28 | Canon Kabushiki Kaisha | Signal transmission apparatus, signal transmission system, and instrument |
| US10784926B2 (en) | 2016-06-09 | 2020-09-22 | Canon Kabushiki Kaisha | Signal transmission apparatus, signal transmission system, and instrument |
| CN109314571B (en) * | 2016-06-09 | 2022-01-14 | 佳能株式会社 | Signal transmission device, signal transmission system and instrument |
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