JPS6399631A - Monitoring system - Google Patents
Monitoring systemInfo
- Publication number
- JPS6399631A JPS6399631A JP61244559A JP24455986A JPS6399631A JP S6399631 A JPS6399631 A JP S6399631A JP 61244559 A JP61244559 A JP 61244559A JP 24455986 A JP24455986 A JP 24455986A JP S6399631 A JPS6399631 A JP S6399631A
- Authority
- JP
- Japan
- Prior art keywords
- optical
- lens
- monitoring
- supervisory
- signal
- 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
- 238000012544 monitoring process Methods 0.000 title claims description 69
- 230000003287 optical effect Effects 0.000 claims abstract description 93
- 239000013307 optical fiber Substances 0.000 claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Optical Communication System (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、分散した監視点情報を監視域毎に集め、中央
監視部からの制御41を令により各監視域+1’、を位
の情報伝送を光通信に31:り行なう塘祝システノ・に
関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention collects dispersed monitoring point information for each monitoring area, and transmits information for each monitoring area + 1' according to a control 41 from a central monitoring unit. 31: Concerning the Toho System in Optical Communication.
従来の技術
例えば、交通監視のように比較的離れた地点の映像を集
中監視する場合、第6図に示すよう・に各監視域に複数
の監視カメラ1を設けて中央監視部で映像監視を行なっ
ている。′iだ、18j1−視域間が長距離になると同
軸ケーブルでの伝送が困知になるために光ファイバを用
いたシステムが実用化されている。このように、光ファ
イバを用いたシステムにおいてはシステムの低価格化を
図るために波長多重技術が用いられている。各監視域4
σにカメラ映像を電気・光信号変換器(以下、E10変
換器と略す)2で所定の波長(λ1.λ2)の光信号に
変換しておき、合波器s K 、1: f) eJ+多
重して光ファイバによって中火監視部に伝送する。中央
監視部においては、波長多重し/こ光信月を分波器5に
よりもとの波長(λ1.λ2)に分団(して光・電気信
号変換器(以下、O/E変換器と略す)66・\−7
でカメラ映像を再生して映像切換器14に入力しておき
、選択器80指令により各監視毎の映像を選択して受像
機7に映出して監視している。BACKGROUND OF THE INVENTION For example, in the case of centrally monitoring images of relatively distant points such as traffic monitoring, a plurality of surveillance cameras 1 are installed in each surveillance area as shown in Fig. 6, and the images are monitored by a central monitoring unit. I am doing it. 18j1- As the distance between viewing zones becomes longer, it becomes difficult to transmit data using coaxial cables, so a system using optical fibers has been put into practical use. As described above, wavelength multiplexing technology is used in systems using optical fibers in order to reduce the cost of the system. Each monitoring area 4
σ, the camera image is converted into an optical signal of a predetermined wavelength (λ1, λ2) by an electric/optical signal converter (hereinafter abbreviated as E10 converter) 2, and a multiplexer s K , 1: f) eJ+ It is multiplexed and transmitted to the medium fire monitoring unit via optical fiber. In the central monitoring unit, the wavelength-multiplexed optical signal is split into the original wavelength (λ1, λ2) by a demultiplexer 5 (optical/electrical signal converter (hereinafter abbreviated as O/E converter)). The camera images are reproduced at 66 and \-7 and inputted to the image switching device 14, and the image for each monitoring is selected by the selector 80 command and displayed on the receiver 7 for monitoring.
このように従来の技術によれば、監視域数と光フアイバ
線数が同数必要であり、監視域数が増えることにより光
フアイバ線数も増えることになり伝送路コストの高騰に
つながる。また、各監視域の監視カメラの台数が増える
と中央監視部のO/E変換器6が監視カメラの台数と同
数必要に々るとともに映像切換器14の規模が大きくな
り、中央監視部の規模の拡大とコストの高騰につながっ
ている。 □
発明が解決しようとする問題点
本発明は上記問題点に鑑み、監視域数と各監視域の監視
カメラの台数に係わらず光伝送路と中央監視部の構成が
簡素で、かつ低価格の監視システムを提供することを目
的とする。As described above, according to the conventional technology, the number of monitoring areas and the number of optical fiber lines are required to be the same, and as the number of monitoring areas increases, the number of optical fiber lines also increases, leading to a rise in transmission line costs. Furthermore, as the number of surveillance cameras in each surveillance area increases, the number of O/E converters 6 in the central monitoring section will be the same as the number of surveillance cameras, and the scale of the video switching device 14 will also increase. This has led to the expansion of the market and rising costs. □ Problems to be Solved by the Invention In view of the above-mentioned problems, the present invention provides a simple and low-cost structure for the optical transmission line and the central monitoring section, regardless of the number of monitoring areas and the number of monitoring cameras in each monitoring area. The purpose is to provide a monitoring system.
問題点を解決するだめの手段
本発明は上記問題点を解決するため、各監視域に光路選
択機能を有する光合波・スイッチ素子を6/、−7・
配置して中央監視部からの切換制御により監視域映像の
選択を行なうとともに、中央監視部のO/E変換器の共
用化を図るものである。Means for Solving the Problems In order to solve the above-mentioned problems, the present invention arranges optical multiplexing/switching elements with optical path selection functions in each monitoring area and controls switching from a central monitoring unit. In addition to selecting a monitoring area video, the central monitoring unit can share an O/E converter.
作用
本発明は上記した構成により、光伝送路および中央監視
部の構成が簡素な監視システムが実現できる。Effect of the Invention With the above-described configuration, the present invention can realize a monitoring system with a simple configuration of the optical transmission line and the central monitoring section.
実施例
第1図は本発明の監視システノ・の−υ、こ施例を示す
ブOツク図である3、な」、・、第6図と同一構成要素
には同一番号を伺j−説明を一部省略する。以下、各監
視域のカメラ数をそれぞJl、2台に仮定して動作を説
明する。各監視1或のカメラ映像をE10変換器2によ
りそれぞわλ1.λ2の光信号に変換しておき、中央監
視部から最遠端の監視域1については光合波器3により
λ1.λ2の光信÷3を光波長多重して元ファイバで監
視域2へ送出する。Embodiment FIG. 1 is a book diagram showing this embodiment of the monitoring system of the present invention. 3. The same components as in FIG. 6 are designated by the same numbers. Part of is omitted. The operation will be described below assuming that the number of cameras in each monitoring area is Jl and two. A certain camera image of each monitor 1 is converted to λ1. It is converted into an optical signal of λ1. The optical signal of λ2 divided by 3 is optically wavelength-multiplexed and sent to the monitoring area 2 through the source fiber.
監視域2については光合波・スイッチ素子4により監視
域2のλ1.λ2の光信号か監視域1の光信号かを中央
監視部の選択器8の切りかえ情Mに7、−
より選択して光ファイバで監視域3へ送出する。Regarding the monitoring area 2, the optical multiplexing/switching element 4 detects λ1. The optical signal of λ2 or the optical signal of the monitoring area 1 is selected by the switching information M7, - of the selector 8 of the central monitoring section and sent to the monitoring area 3 via an optical fiber.
監視域3、監視域4についても同様の動作をする。Similar operations are performed for monitoring area 3 and monitoring area 4.
−力、中央監視部は監視域1から監視域4のいずれかの
光信号を入力して光分波器5によりλ1とλ2の光信号
を分離して07E変換器6でもとの映像信号を再生し、
受像機7で監視する。- The central monitoring unit inputs optical signals from monitoring areas 1 to 4, separates the optical signals of λ1 and λ2 using an optical demultiplexer 5, and outputs the original video signal using a 07E converter 6. play,
Monitor with receiver 7.
次に、光合波・スイッチ素子4は、自監視域のλ1.λ
2の光信号と他監視域の光信号のいずれかを選択するも
ので、第2図A1≧示すような多重信号によって第2図
Bに示す動作により監視域を選択指令するものである。Next, the optical multiplexing/switching element 4 selects λ1. λ
The system selects either the optical signal of No. 2 or the optical signal of another monitoring area, and selects the monitoring area by the operation shown in FIG. 2B using a multiplexed signal as shown in FIG. 2 A1≧.
選択器8の選択情報を多重化器9で直列信号に変換して
おき、E10変換器1oで光信号に変換して各監視域に
伝送する。各監視域においては光分岐器11でそれぞれ
2分岐してO/に変換器12で直列信号を再生し、多重
化・分離器13でもとの並列信号を得る。The selection information of the selector 8 is converted into a serial signal by a multiplexer 9, converted into an optical signal by an E10 converter 1o, and transmitted to each monitoring area. In each monitoring area, an optical splitter 11 branches the signal into two, an O/converter 12 regenerates the serial signal, and a multiplexer/separator 13 obtains the original parallel signal.
光合波・スイッチ素子4は例えば第3図で構成できる。The optical multiplexing/switching element 4 can be constructed as shown in FIG. 3, for example.
第3図において41.42.43は光信号を平行光束に
するレンズ、44は平行光束を集束するレンズ、45は
中央監視部の監視域選択指令によりa点とb点のいずJ
Iかに固定される光学部材である。光学部月45はレン
ズ410平行光束を光軸外に反射させるミラーm1と、
レンズ42の平行光束をレンズ44の光軸方向に反射さ
せるミラーm2と、ミラーm2の反射光を透過させると
ともにレンズ43の、x17−行尤束をレンズ440光
軸方向に反射させるフィルター3で構成される。波長λ
0(λ1とλ2の合波信号)の光信号をレンズ41に、
波長λ1の光信号をレンズ42に、波長λ2の光信号を
レンズ43にそれぞれ入力した場合の光信月選択動作を
述べる。′tJJi、長λQの光信号をレンズ44に入
力する場合には第4図に示すように光学部材45をa点
に、波長λ1゜λ2の光信号をレンズ44に入力する場
合には第5図に示すように光学部材45をb点にそれぞ
れ移動ζせることにより光信号を選択することができる
。In Fig. 3, 41, 42, and 43 are lenses that convert the optical signal into parallel beams, 44 is a lens that focuses the parallel beams, and 45 is the point J between point a and point B according to the monitoring area selection command from the central monitoring unit.
This is an optical member that is fixed to the I. The optical unit 45 includes a mirror m1 that reflects the parallel light beam of the lens 410 off the optical axis;
Consisting of a mirror m2 that reflects the parallel light flux of the lens 42 in the optical axis direction of the lens 44, and a filter 3 that transmits the reflected light of the mirror m2 and reflects the x17-line likelihood flux of the lens 43 in the optical axis direction of the lens 440. be done. wavelength λ
0 (combined signal of λ1 and λ2) to the lens 41,
The optical signal selection operation when an optical signal with a wavelength λ1 is input to the lens 42 and an optical signal with a wavelength λ2 is input to the lens 43 will be described. 'tJJi, when inputting an optical signal with a long wavelength λQ to the lens 44, the optical member 45 is set at point a, as shown in FIG. As shown in the figure, an optical signal can be selected by moving the optical member 45 to point b, respectively.
発明の効果
本発明によれば、各監視域に光路切りがえ機能を有する
光合波・スイッチ素子を配置して中央監9、。Effects of the Invention According to the present invention, an optical multiplexing/switching element having an optical path switching function is arranged in each monitoring area to provide a central monitoring system 9.
祝部から選択指令することにより光伝送路の簡素化が可
能になるとともに、中央監視部のO/E変換部の小型化
が図れシステムの低価格化が笑現できる。By issuing a selection command from the reception section, it is possible to simplify the optical transmission path, and the O/E conversion section of the central monitoring section can be downsized, making it possible to reduce the cost of the system.
第1図は本発明の一実施例の監視システムを示すブロッ
ク図、第2図は光合波・スイッチ素子の選択指令情報の
一例を示すフレーム構成図、第3図は同監視システムに
おける一例の光合波・スイッチ素子の具体構成図、第4
図および第6図は光合波・スイッチ素子の動作説明図、
第6図は従来例の監視システムのブロック図である。
1・・・・・・監視カメラ、2・・・・・・E10変換
器、3・・・・・・光合波器、4・・・・・・光合波・
スイッチ素子、5・・・・・・光分波器、6・・・・・
・O/E変換器、7・・・・・・受像機、8・・・・・
・選択器、9・・・・・・多重化器、1o・・・・・・
E10変換器、11・・・・・・分岐器、12・・・・
・・O/E変換器、13・・・・・・多重化・分離器。
代理人の氏名 弁理士 中 尾 敏 男 ほか1名第3
図
第2図
第4図FIG. 1 is a block diagram showing a monitoring system according to an embodiment of the present invention, FIG. 2 is a frame configuration diagram showing an example of selection command information for optical multiplexing/switching elements, and FIG. 3 is an example optical multiplexing/switching element in the monitoring system. Specific configuration diagram of wave/switch element, Part 4
Figure 6 is an explanatory diagram of the operation of the optical multiplexing/switching element,
FIG. 6 is a block diagram of a conventional monitoring system. 1... Surveillance camera, 2... E10 converter, 3... Optical multiplexer, 4... Optical multiplexer.
Switch element, 5... Optical demultiplexer, 6...
・O/E converter, 7... Receiver, 8...
・Selector, 9... Multiplexer, 1o...
E10 converter, 11... branch, 12...
...O/E converter, 13...Multiplexer/separator. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 3
Figure 2 Figure 4
Claims (4)
情報をそれぞれ異なる波長の光信号に変換する電気・光
信号変換器群よりなるN個の監視域を有し、遠端部の監
視域に備えた光合波器と、中継部の監視域に備えた(N
−1)個の光合波・スイッチ素子と、中央監視部の光分
波器とを光ファイバにより接続しておき、中央監視部の
発する監視域選択情報により中継部の光合波・スイッチ
素子を切りかえることにより任意の監視域を選択するこ
とを特徴とする監視システム。(1) It has N monitoring areas consisting of a plurality of monitoring blocks and a group of electrical/optical signal converters that convert the monitoring information of the monitoring blocks into optical signals of different wavelengths, and a monitoring area at the far end. An optical multiplexer installed in the monitoring area and (N
-1) The optical multiplexing/switching elements and the optical demultiplexer in the central monitoring section are connected by optical fibers, and the optical multiplexing/switching elements in the relay section are switched based on the monitoring area selection information issued by the central monitoring section. A monitoring system characterized in that an arbitrary monitoring area can be selected by
入力して平行光束にする第1のレンズと、第1のレンズ
の光軸と垂直に位置し第2の波長の光信号を入力して平
行光束にする第2のレンズと、第1のレンズの光軸と垂
直に位置し第3の波長の光信号を入力して平行光束にす
る第3のレンズと、第1のレンズの光軸と水平に位置し
平行光束を集束する第4のレンズと、第1、第2、第3
、第4のレンズの光軸上に配置され、第1のレンズの平
行光束を光軸外に反射させる第1のミラーと、第2のレ
ンズの平行光束を第4のレンズの光軸方向に反射させる
第2のミラーと、第3のレンズの平行光束を第4のレン
ズの光軸方向に反射させるとともに第2のミラーの反射
光を透過させるフィルターとを有する光学部材により構
成され、光学部材を挿入または除去することにより第2
と第3の波長の合波出力と第1の波長の光信号とを選択
して第4のレンズで集束させることを特徴とする特許請
求の範囲第1項記載の監視システム。(2) The optical multiplexing/switching element includes a first lens that receives an optical signal of a first wavelength and converts it into a parallel beam, and a lens that is located perpendicular to the optical axis of the first lens and receives an optical signal of a second wavelength. a second lens that inputs an optical signal of a third wavelength and converts it into a parallel beam; a third lens located perpendicular to the optical axis of the first lens inputs an optical signal of a third wavelength and converts it into a parallel beam; a fourth lens that is located horizontally to the optical axis of the lens and focuses a parallel light beam, and a first, second, and third lens.
, a first mirror that is disposed on the optical axis of the fourth lens and reflects the parallel light beam of the first lens off the optical axis; and a first mirror that reflects the parallel light beam of the second lens in the direction of the optical axis of the fourth lens. The optical member is constituted by an optical member having a second mirror that reflects the light, and a filter that reflects the parallel light beam of the third lens in the optical axis direction of the fourth lens and transmits the reflected light of the second mirror. by inserting or removing the second
2. The monitoring system according to claim 1, wherein the multiplexed output of the third wavelength and the optical signal of the first wavelength are selected and focused by a fourth lens.
切りかえ指令をする選択器と、前記選択器の切換情報を
直列信号に変換する多重化器と、多重化器出力を光信号
に変換する電気・光信号変換器と、光ファイバを介して
送られてくる各監視域の情報である複数の波長の光信号
をそれぞれの波長に分離する分波器と、分波器出力を電
気信号に変換する光・電気信号変換器と、モニタ・ブロ
ックを有することを特徴とする特許請求の範囲第1項記
載の監視システム。(3) The central monitoring unit includes a selector that issues switching commands to the optical multiplexing/switching elements in the relay unit, a multiplexer that converts the switching information of the selector into a serial signal, and a multiplexer output that converts the output of the multiplexer into an optical signal. An electrical/optical signal converter converts the signals, a demultiplexer separates the optical signals of multiple wavelengths that are information of each monitoring area sent via optical fiber into each wavelength, and a demultiplexer converts the output of the demultiplexer into electrical signals. 2. The monitoring system according to claim 1, comprising an optical/electrical signal converter for converting into a signal and a monitor block.
合波・スイッチ素子の切りかえ情報を自中継部と他中継
部に分ける分岐器と、自中継部に分岐された光合波・ス
イッチ素子の切りかえ情報を電気信号に変換する光・電
気信号変換器と、直列・並列変換して自中継部の光合波
・スイッチ素子の切りかえ情報を再生する多重化・分離
器と、自中継部の監視域情報と他中継部の監視域情報を
それぞれ光信号で入力しておき光合波・スイッチ素子の
切りかえ情報によりいずれかを選択出力する光合波・ス
イッチ素子を有することを特徴とする特許請求の範囲第
1項記載の監視システム。(4) The relay section consists of a brancher that divides the switching information of the optical multiplexing/switching element sent by an optical signal from the central monitoring section into its own relay section and another relay section, and an optical multiplexing/switch that is branched to its own relay section. An optical/electrical signal converter that converts element switching information into electrical signals, a multiplexer/separator that performs serial/parallel conversion and regenerates optical multiplexing/switching element switching information in the own repeater, and A patent claim characterized in that it has an optical multiplexing/switching element that inputs monitoring area information and monitoring area information of other relay parts as optical signals, and selects and outputs one of them based on switching information of the optical multiplexing/switching element. The monitoring system described in Scope 1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61244559A JPS6399631A (en) | 1986-10-15 | 1986-10-15 | Monitoring system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61244559A JPS6399631A (en) | 1986-10-15 | 1986-10-15 | Monitoring system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6399631A true JPS6399631A (en) | 1988-04-30 |
Family
ID=17120510
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP61244559A Pending JPS6399631A (en) | 1986-10-15 | 1986-10-15 | Monitoring system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6399631A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0252316A (en) * | 1988-08-16 | 1990-02-21 | Hitachi Cable Ltd | Wavelength multiplex transmission module with monitoring function |
US4977449A (en) * | 1988-09-19 | 1990-12-11 | Morgan Jack B | Video switching systems using frequency agile modulators and demodulators |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5643841A (en) * | 1979-09-17 | 1981-04-22 | Nec Corp | Switching system for optical fiber transmission line |
JPS61208325A (en) * | 1985-03-12 | 1986-09-16 | Hitachi Ltd | Optical information distributing and collecting method |
-
1986
- 1986-10-15 JP JP61244559A patent/JPS6399631A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5643841A (en) * | 1979-09-17 | 1981-04-22 | Nec Corp | Switching system for optical fiber transmission line |
JPS61208325A (en) * | 1985-03-12 | 1986-09-16 | Hitachi Ltd | Optical information distributing and collecting method |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0252316A (en) * | 1988-08-16 | 1990-02-21 | Hitachi Cable Ltd | Wavelength multiplex transmission module with monitoring function |
US4977449A (en) * | 1988-09-19 | 1990-12-11 | Morgan Jack B | Video switching systems using frequency agile modulators and demodulators |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP2989269B2 (en) | Cross connection for optical networks | |
US6016212A (en) | Optical receiver and demultiplexer for free-space wavelength division multiplexing communications systems | |
US6061157A (en) | Optical wavelength multiplexing and demultiplexing device and an optical transmission system using the same | |
US5822474A (en) | Optical branching apparatus and transmission line setting method therefor | |
JP2763167B2 (en) | Optical switching network | |
EP1043847B1 (en) | Wavelength-division multiplex transmission network device using a transceiver having a 2-input/2-output optical switch | |
JP6434861B2 (en) | Optical cross-connect device and optical module | |
JPS6399631A (en) | Monitoring system | |
US7133614B2 (en) | Optical multiple transmission method, optical network and optical transmission apparatus | |
JP2004135331A (en) | Optical cross-connect system | |
JP2713324B2 (en) | Lightwave address system | |
JP3342093B2 (en) | Network system | |
JPH09289488A (en) | Optical undersea branch device | |
JPH0714228B2 (en) | Time division wavelength division merging type optical switching communication path device | |
JPH0293436A (en) | Wavelength selective space switch | |
JPS62258527A (en) | Wavelength multiplex optical communication system | |
JPS6251895A (en) | Wavelength multiplex optical switching circuit | |
JPH07264165A (en) | Wavelength multiplex optical connection equipment | |
JP2658114B2 (en) | Wavelength conversion switch | |
JP3244248B2 (en) | Optical information distribution device | |
Klaus et al. | Network Technologies for SDM | |
JPS63253915A (en) | Optical tuner | |
JPS58161487A (en) | Optical exchange circuit network | |
JPH0276497A (en) | Light exchange | |
JP2006060734A (en) | Optical transmission system |