JPS63198109A - Light communication system - Google Patents
Light communication systemInfo
- Publication number
- JPS63198109A JPS63198109A JP62029908A JP2990887A JPS63198109A JP S63198109 A JPS63198109 A JP S63198109A JP 62029908 A JP62029908 A JP 62029908A JP 2990887 A JP2990887 A JP 2990887A JP S63198109 A JPS63198109 A JP S63198109A
- Authority
- JP
- Japan
- Prior art keywords
- light emitting
- detection device
- range
- identification card
- light
- 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
- 238000001514 detection method Methods 0.000 claims abstract description 42
- 230000003287 optical effect Effects 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
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- 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、固有のコードを持つ識別カードとそのコー
ドの識別を行う検知装置との間で光信号の送受信を行う
光通信システムに関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an optical communication system that transmits and receives optical signals between an identification card having a unique code and a detection device that identifies the code. be.
従来この種の光通信システムにおいては、例えば第４図
に示すように天井面１に近い壁面あるいはドアの前面の
上方に検知装置２が設置され、識別カード３は通常所有
者の胸のポケットなどその人の身長以下の位置（床４面
から距ｔｓＨの位置）にある。そして、識別カード３は
固有のコードを持っており、検知装置２からの要求信号
に応じてそのコードを光信号として送信すると、検知装
置２にて、そのコードの識別が行われ、ドアの開閉など
然るべき動作が実行される。Conventionally, in this type of optical communication system, the detection device 2 is installed above the wall near the ceiling 1 or the front of the door, as shown in FIG. 4, and the identification card 3 is usually placed in the owner's chest pocket or the like. It is located at a position below the person's height (at a distance tsH from the 4th floor). The identification card 3 has a unique code, and when the code is transmitted as an optical signal in response to a request signal from the detection device 2, the detection device 2 identifies the code and opens/closes the door. Appropriate actions such as this are executed.
第５図（ａ）、（ｂ）は上記識別カード３における発光
素子及び受光素子の設置位置（角度）を示したものであ
る。図示のように、カード面５に対して垂直な方向に光
が放射、到来することを想定してその先軸がカード面５
の法線と一致するように発光素子及び受光素子が取り付
けられている。従つて送受信時には、識別カード３のカ
ード面５を検知装置２の方に向けて保持させる必要があ
り、また？ｇ６図に示すように検知装置２が識別カード
３と同じ位の低い位置にある時には（第４図の点線で示
す）カード面５が垂直になるようにして送受信を行う。FIGS. 5(a) and 5(b) show the installation positions (angles) of the light-emitting element and the light-receiving element in the identification card 3. FIG. As shown in the figure, assuming that the light is emitted and arrives in a direction perpendicular to the card surface 5, the leading axis is the card surface 5.
The light-emitting element and the light-receiving element are attached so as to coincide with the normal line. Therefore, when transmitting and receiving, it is necessary to hold the identification card 3 with the card surface 5 facing the detection device 2. When the detection device 2 is at the same low position as the identification card 3, as shown in FIG.
従来の光通信システムは上記のように構成されているた
め、送受信の都度識別カード３の受発光方向を検知装置
２の方向に合わせなければならず、特に識別カード３を
胸の部分にバッチのように取り付けて使用する際には取
り扱いが不便であるという問題点があった。また、検知
装置２の設置位置が低い場合には識別カード３を保持し
た人の進行にとって検知装置２が障害物となり、移動範
囲が制限され、従フて検知装置２の受発光面の反対側か
らの識別はできず、一度検知装置２の前面に回り込む必
要があり、送受信時の制限が大きいという問題点があっ
た。Since the conventional optical communication system is configured as described above, the receiving/emitting direction of the identification card 3 must be aligned with the direction of the detection device 2 each time transmission/reception is performed. There is a problem in that it is inconvenient to handle when installed and used in this way. Furthermore, if the detection device 2 is installed at a low position, the detection device 2 will become an obstacle for the person holding the identification card 3, and the movement range will be restricted. This poses a problem in that it is not possible to identify the sensor from the outside, and it is necessary to go around to the front of the detection device 2, which imposes large restrictions on transmission and reception.
この発明は、このような問題点に着目してなされたちの
で、識別カートの取り扱いが容易で、また送受信時の制
限が少ない光通信システムを提供するものである。The present invention has been made in view of these problems, and therefore provides an optical communication system in which the handling of identification carts is easy and there are fewer restrictions on transmission and reception.
この発明の光通信システムは、固有のコードを持つ識別
カードとそのコードの識別を行う検知装置との間で光信
号の送受信を行うものにおいて、前記検知装置の信号光
発光範囲の限界面と通常の保持状態における識別カード
の信号光発光範囲の限界面とが略同一になるようにし、
且つ、検知装置の受光素子をその信号光受光範囲が発光
素子の発光範囲より大きくなるように設けると共に、識
別カードの受光素子をその信号光受光範囲が発光素子の
発光範囲より大きくなるように設けたものである。The optical communication system of the present invention transmits and receives optical signals between an identification card having a unique code and a detection device that identifies the code, in which the limit of the signal light emission range of the detection device and the normal so that the limit surface of the signal light emitting range of the identification card in the holding state is substantially the same,
In addition, the light receiving element of the detection device is arranged so that its signal light receiving range is larger than the light emitting range of the light emitting element, and the light receiving element of the identification card is arranged so that its signal light receiving range is larger than the light emitting range of the light emitting element. It is something that
この発明の光通信システムにおいては、検知装置の発光
方向の限界面と通常の保持状態での識別装置の発光方向
の限界面とが略同一であり、また検知装置と識別装置の
各々において受光範囲が発光範囲より大きくなるように
受光素子が設けられている。このため、通常の状態では
送受信時に識別カードの向きを直す必要がなく、取り扱
いが便利になり、送受信時の制限も少ないものとなる。In the optical communication system of the present invention, the limit surface of the light emission direction of the detection device and the limit surface of the light emission direction of the identification device in the normal holding state are approximately the same, and the light receiving range of each of the detection device and the identification device is The light receiving element is provided so that the light emitting range is larger than the light emitting range. Therefore, under normal conditions, there is no need to change the orientation of the identification card when transmitting and receiving, making handling convenient and having fewer restrictions on transmitting and receiving.
以下、この発明の一実施例を第１図ないし第３図につい
て説明する。An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.
第１図は検知装置２及び識別カード３の配置位置を示し
たものであり、従来と同様検知装置２は天井面１の近く
で、その発光範囲の中心軸が壁あるいはドアと平行な面
（垂直面）に対して角度Ｕを持つように設置されている
。この検知装置２の信号光発光範囲の限界面は、図の点
線で示すように通常の保持状態における識別カード３の
信号光発光範囲の限界面と略同一であり、芥々の発光範
囲の中心Ｍ（ｉＪｌ線で示す）は略平行となっている。FIG. 1 shows the arrangement positions of the detection device 2 and the identification card 3. As in the conventional case, the detection device 2 is located near the ceiling surface 1, and the central axis of its light emitting range is parallel to the wall or door ( It is installed so that it has an angle U with respect to the vertical plane. The limit plane of the signal light emission range of this detection device 2 is approximately the same as the limit plane of the signal light emission range of the identification card 3 in the normal holding state, as shown by the dotted line in the figure, and the limit plane of the signal light emission range of the identification card 3 is the center of the light emission range of the reed. M (indicated by the iJl line) is substantially parallel.
また検知装置２の受光素子は、その信号光受光範囲が発
光素子の発光範囲より大きくなるように設けられており
、同様に識別カード３においても受光素子はその信号光
受光範囲が発光素子の発光範囲より大きくなるように設
けられている。In addition, the light receiving element of the detection device 2 is provided so that its signal light receiving range is larger than the light emitting range of the light emitting element. It is set so that it is larger than the range.
第２図は識別カード３の外観形状を示す図であり、外枠
ケースの上面６の部分は、内部の発光素子及び受光素子
の指向特性をそのまま効果的に用いるべく肉厚一定の半
球状となっており、且つ光信号として使用する波長の信
号光のみを透過させて他の波長の光をカットする光フィ
ルタとしである。そしてこの識別カード３は、所持者の
衣服に装着し易いように折り曲げ構造となっており、通
常側面７が垂直となるように保持される。FIG. 2 is a diagram showing the external shape of the identification card 3. The upper surface 6 of the outer frame case has a hemispherical shape with a constant wall thickness in order to effectively utilize the directional characteristics of the internal light-emitting element and light-receiving element. It is an optical filter that transmits only signal light of the wavelength used as an optical signal and cuts light of other wavelengths. The identification card 3 has a folding structure so that it can be easily attached to the wearer's clothing, and is normally held with the side surface 7 vertical.
また第３図は識別カード３の上部断面構造を示したもの
である。この識別カード３の上部には前述した発光素子
８及び受光素子９が配設されており、発光素子８は第３
図（ａ）に示すように、その発光範囲の中心軸が側面７
と平行な面に対して角度ＵＣを持つように設けられ、受
光素子９も同様に、その受光範囲の中心軸が側面７の平
行面と角度ＵＣをもつように設けられている。そして、
発光素子８はそれ自体でレンズパッケージによる固有の
発光指向性を有しており、受光素子９もバッケージによ
り゛ト球状の受光指向性を有している。Further, FIG. 3 shows a cross-sectional structure of the upper part of the identification card 3. As shown in FIG. The above-mentioned light emitting element 8 and light receiving element 9 are arranged on the upper part of this identification card 3, and the light emitting element 8 is the third one.
As shown in Figure (a), the central axis of the light emitting range is at the side surface 7.
Similarly, the light-receiving element 9 is provided so that the center axis of its light-receiving range makes an angle UC with the parallel surface of the side surface 7. and,
The light emitting element 8 itself has a unique light emitting directivity due to the lens package, and the light receiving element 9 also has a spherical light receiving directivity due to the package.
なお、これらの発光素子８及び受光素子９を備えた識別
カード３の上部は、他に第３図（ｃ）、（ｄ）に示すよ
うな構造とすることも可能である。即ち、第３図（Ｃ）
に示すものは、受光素子９を側面７と平行に取り付け、
その受光面側の周囲に光透過性樹Ｆ￥ｊ１０を充填させ
たものであり、この光透過性樹脂ｌＯにより受光指向性
を上面６に傾けさせ、前述の角度ＵＣにその中心軸を合
わせている。また、第３図（ｄ）に示すものは、発光素
子８及び受光素子９を収納する部分全体を角度ＵＣを持
って傾斜させたものである。そして、これらの構造の組
合せとすることも可能である。Note that the upper part of the identification card 3 provided with the light emitting element 8 and the light receiving element 9 can also have a structure as shown in FIGS. 3(c) and 3(d). That is, FIG. 3(C)
In the case shown in , the light receiving element 9 is attached parallel to the side surface 7,
The area around the light-receiving surface side is filled with a light-transmitting tree F\j10, and the light-receiving directivity is tilted toward the upper surface 6 by this light-transmitting resin IO, and its central axis is aligned with the angle UC mentioned above. There is. Furthermore, in the case shown in FIG. 3(d), the entire portion housing the light emitting element 8 and the light receiving element 9 is inclined at an angle UC. A combination of these structures is also possible.
上記のような構成の光通信システムにおいて、識別カー
ド３が例えば第１図に示すように床面４から距ｍＨの所
にあり、側面７が床面４と垂直になっているとすると、
その識別カード３の通（３可能範囲りはカード進行方向
Ａに対して図示のようになる。３ａ、３ｂはその通信限
界位置にある識別カードを示したものである。そして、
カード進行方向Ａと逆向きで識別カード３に向けて設置
した検知装置２から上記通信可能範囲りの中心の位置、
つまり壁あるいはドアから距ｌ１ＩＬｏの位置にある識
別カード３へ発射される信号光の光線強度をＥＩＩＭと
すると、通信限界位置にある識別カード３ａへの信号光
の光線強度Ｅ□は、
ＥＨａ＝にａ Ｅ ＨＭ ＣＯＳ （９）となる（に８
は定数）。また、カード３ａで受光された信号光の変換
電流■、は。In the optical communication system having the above configuration, suppose that the identification card 3 is located at a distance mH from the floor 4 as shown in FIG. 1, and the side surface 7 is perpendicular to the floor 4.
The pass of the identification card 3 (the possible range of the identification card 3 is as shown in the figure with respect to the card advancing direction A. 3a and 3b show the identification card at the communication limit position.
The center position of the communication range from the detection device 2 installed facing the identification card 3 in the opposite direction to the card advancing direction A,
In other words, if the intensity of the signal light emitted to the identification card 3 at a distance l1ILo from the wall or door is EIIM, the intensity E□ of the signal light to the identification card 3a located at the communication limit position is EHa=. a E HM COS (9) (to 8
is a constant). Also, the conversion current (■) of the signal light received by the card 3a is.
’ａ＝ＫｄＥＨａ
である。（ＫＣＡは定数）。この変換電流夏、は、識別
カード３が検知装置２と通信できる範囲内へ感度を表わ
している。'a=KdEHa. (KCA is a constant). This converted current represents the sensitivity within the range where the identification card 3 can communicate with the detection device 2.
逆に識別カード３から発射される信号光の光線強度をＥ
ＣＭとすると、限界位置のカード３ａから検知装置２へ
の信号光の光線強度ＥＣＩＩは、Ｅ ＣＭ”にｃ ＥＣ
Ｍ ＣＯ８（＋）となり（にＣは定数）、同様に検知装
置２での変換電流ＩＨは、
Ｉ ｓ ＝ Ｋ ７３ Ｅ ｃＨ
となる（ＫＩ！３は定数）。Conversely, the intensity of the signal light emitted from the identification card 3 is E.
CM, the beam intensity ECII of the signal light from the card 3a at the limit position to the detection device 2 is expressed as EC
M CO8 (+) (C is a constant), and similarly, the converted current IH in the detection device 2 is I s = K 73 E cH (KI!3 is a constant).
ここで、上記検知装置２での変換電流Ｉ １１は限界値
であるので、
■□＝に１８
として表わされる。この式の定数には、識別カート３と
検知装置２の光強度、感度の違いによって決まる比例定
数であり、
である。従って、新たな定数に′を用いて上式をｃｏｓ
（＋） ＝ Ｋ’ ｃｏｓ（１）と書き直すことができ
る。同様にして、反対側の限界位置にある識別カード３
ｃに対しても定数に−を用いて、
ｃｏｓ（４） ＝にｃｏｓ （号）
の式を得ることができる。Here, since the converted current I 11 in the detection device 2 is a limit value, it is expressed as 18 in □=. The constant in this equation is a proportionality constant determined by the difference in light intensity and sensitivity between the identification cart 3 and the detection device 2, and is as follows. Therefore, by using ′ as a new constant, we can change the above equation to cos
It can be rewritten as (+) = K' cos(1). Similarly, the identification card 3 in the opposite limit position
By using - as a constant for c, we can obtain the formula cos (4) = cos (number).
従って、検知装置２の受光素子の指向性を発光素子の指
向性より大きくなるようにして、該検知装置２を取付け
の角度Ｕをもフて設置すると共に識別カード３の受光素
子の指向性を発光素子の指向性より大きくなるようにし
て、該識別カード３を取付けの角度ＵＣをもって設置す
れば、各々の発光素子の指向性角度は自ずと決まる。Therefore, the directionality of the light-receiving element of the detection device 2 is set to be larger than the directionality of the light-emitting element, and the detection device 2 is installed with the mounting angle U being adjusted, and the directionality of the light-receiving element of the identification card 3 is adjusted. If the identification card 3 is installed at an installation angle UC such that the directivity is larger than the directivity of the light emitting elements, the directivity angle of each light emitting element is determined automatically.
このため、発光素子としてその光源からの指向性を限定
したものを使用することができ、また、識別カードを通
常の状態で保持していれば、送受信の都度検知装置の方
へ受発光面を向かせる必要がなくなり、取り扱いが便利
である。同時に、検知装置の指向性に合わせることで、
その範囲内でのみ通信可能となり、多数の検知装置が並
置されていても同一種類（波長）の信号光を使用するこ
とにより、その場所での識別ができ、送受信に際しての
制限も少ないものとなる。For this reason, it is possible to use a light-emitting element with limited directivity from the light source, and if the identification card is held in a normal state, the light-receiving and light-receiving surface faces the detection device each time it is transmitted or received. It is convenient to handle as there is no need to turn it. At the same time, by matching the directionality of the detection device,
Communication is possible only within that range, and even if many detection devices are placed side by side, by using the same type (wavelength) of signal light, they can be identified at that location, and there are fewer restrictions on transmission and reception. .
以上説明したように、この発明によれば、識別カードを
通常の状態で保持していれば送受信の都度その受発光面
を検知装置に向ける必要がなく、取り扱いが便利になる
という効果があり、また、送受信時の制限が少なくなる
という効果か得られる。As explained above, according to the present invention, if the identification card is held in a normal state, there is no need to face the receiving/emitting surface toward the detection device each time it is sent or received, which makes handling convenient. Additionally, the effect of reducing restrictions on transmission and reception can be obtained.
第１図ないし第３図はこの発明の一実施例を示す図で、
第１図は検知装置と識別カードの配置位置及び通信範囲
を示す説明図、第２図は識別カードの外観形状を示す斜
視図、第３図（ａ）、（ｂ）、（Ｃ）、（ｄ）は識別カ
ードの上部構造を示す断面図、第４図は一般的な光通信
システムの構成を示す説明図、第５図（ａ）、（ｂ）は
従来の識別カードの構造を示す斜視図、第６図は検知装
置が低い場所にある時の通信動作を示す説明図である。
２−−−−−−検知装置
３−・・−識別カード
８−−−−−発光素子
９−−−−−−受光素子
出願人 スタンレー電気株式会社
第３図Figures 1 to 3 are diagrams showing one embodiment of the present invention,
Fig. 1 is an explanatory diagram showing the arrangement position and communication range of the detection device and the identification card, Fig. 2 is a perspective view showing the external shape of the identification card, and Figs. 3 (a), (b), (C), ( d) is a sectional view showing the upper structure of an identification card, FIG. 4 is an explanatory diagram showing the configuration of a general optical communication system, and FIGS. 5(a) and (b) are perspective views showing the structure of a conventional identification card. 6 are explanatory diagrams showing the communication operation when the detection device is in a low place. 2------Detection device 3---Identification card 8------Light emitting element 9------Light receiving element Applicant Stanley Electric Co., Ltd. Figure 3
Claims (1)
う検知装置との間で光信号の送受信を行う光通信システ
ムにおいて、前記検知装置の信号光発光範囲の限界面と
通常の保持状態における識別カードの信号光発光範囲の
限界面とが略同一になるようにし、且つ、検知装置の受
光素子をその信号光受光範囲が発光素子の発光範囲より
大きくなるように設けると共に、識別カードの受光素子
をその信号光受光範囲が発光素子の発光範囲より大きく
なるように設けたことを特徴とする光通信システム。In an optical communication system that transmits and receives optical signals between an identification card having a unique code and a detection device that identifies the code, the identification card is at the limit of the signal light emission range of the detection device and in a normal holding state. The light receiving element of the detection device is arranged so that its signal light receiving range is larger than the light emitting range of the light emitting element. An optical communication system characterized in that the signal light receiving range is larger than the light emitting range of the light emitting element.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62029908A JPS63198109A (en) | 1987-02-13 | 1987-02-13 | Light communication system |
| GB8716885A GB2193021B (en) | 1986-07-24 | 1987-07-17 | Optical identification card system |
| US07/076,376 US4853524A (en) | 1986-07-24 | 1987-07-22 | Optical identification card system |
| DE19873724248 DE3724248A1 (en) | 1986-07-24 | 1987-07-22 | OPTICAL IDENTIFICATION CARD SYSTEM |
| FR8710476A FR2602076B1 (en) | 1986-07-24 | 1987-07-23 | DEVICE WITH OPTICAL IDENTIFICATION CARDS. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62029908A JPS63198109A (en) | 1987-02-13 | 1987-02-13 | Light communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63198109A true JPS63198109A (en) | 1988-08-16 |
Family
ID=12289089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62029908A Pending JPS63198109A (en) | 1986-07-24 | 1987-02-13 | Light communication system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63198109A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0675966A (en) * | 1992-06-09 | 1994-03-18 | Ebara Infilco Co Ltd | Vehicle identification device and vehicle management system using the device |
| US5691886A (en) * | 1991-04-30 | 1997-11-25 | Vari-Lite, Inc. | Programmable rotatable gobo system |
| US5758956A (en) * | 1991-04-30 | 1998-06-02 | Vari-Lite, Inc. | High intensity lighting projectors |
| US6769792B1 (en) | 1991-04-30 | 2004-08-03 | Genlyte Thomas Group Llc | High intensity lighting projectors |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5911478A (en) * | 1982-07-10 | 1984-01-21 | Nippon Telegr & Teleph Corp <Ntt> | Contactless interface for ic card |
-
1987
- 1987-02-13 JP JP62029908A patent/JPS63198109A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5911478A (en) * | 1982-07-10 | 1984-01-21 | Nippon Telegr & Teleph Corp <Ntt> | Contactless interface for ic card |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5691886A (en) * | 1991-04-30 | 1997-11-25 | Vari-Lite, Inc. | Programmable rotatable gobo system |
| US5758956A (en) * | 1991-04-30 | 1998-06-02 | Vari-Lite, Inc. | High intensity lighting projectors |
| US5829868A (en) * | 1991-04-30 | 1998-11-03 | Vari-Lite, Inc. | High intensity lighting projectors |
| US6011640A (en) * | 1991-04-30 | 2000-01-04 | Vari-Lite, Inc. | High intensity lighting projectors |
| US6769792B1 (en) | 1991-04-30 | 2004-08-03 | Genlyte Thomas Group Llc | High intensity lighting projectors |
| JPH0675966A (en) * | 1992-06-09 | 1994-03-18 | Ebara Infilco Co Ltd | Vehicle identification device and vehicle management system using the device |
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