JPH084250B2 - Mobile signal transmission equipment - Google Patents
Mobile signal transmission equipmentInfo
- Publication number
- JPH084250B2 JPH084250B2 JP61032735A JP3273586A JPH084250B2 JP H084250 B2 JPH084250 B2 JP H084250B2 JP 61032735 A JP61032735 A JP 61032735A JP 3273586 A JP3273586 A JP 3273586A JP H084250 B2 JPH084250 B2 JP H084250B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- signal transmission
- mobile body
- route
- transmission equipment
- 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.)
- Expired - Fee Related
Links
Landscapes
- Optical Communication System (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、列車運転時にホームの状態等の地上の状
態を乗務員室に伝送するための移動体用信号伝送装置に
関するものである。Description: TECHNICAL FIELD The present invention relates to a signal transmission device for a mobile body for transmitting a ground condition such as a condition of a platform to a crew cabin during train operation.
従来、列車運転時にホームの状態を乗務員室に伝送
し、運転室または車掌室のモニタテレビにホームの情景
を写しだし、運転の安全確認を行なう装置が提案されて
いる。これは、地上側に移動体が走行する所定区間をカ
バーする発光器を、移動体に受光器を設け、地上側で撮
像したホームの情景を光空間伝送するようにしたもので
ある。2. Description of the Related Art Conventionally, there has been proposed a device that transmits the state of a home to a crew room during train operation, displays a scene of the home on a monitor TV in a driver's cab or a conductor's room, and confirms driving safety. In this system, a light emitting device is provided on the ground side to cover a predetermined section in which the moving body travels, and a light receiving device is provided on the moving body to transmit the scene of the home imaged on the ground side in an optical space.
しかしながらこのような従来の装置は、所定の経路の
うち所定の区間をカバーするために、発光器は広い角度
範囲をカバーする必要があり、またこの所定区間の全て
で受信が行なえるようにするために、発光器の出力レベ
ルは最遠距離を基準として設定する必要があるので、高
出力の発光器が必要となり経済性に問題がある。また、
発光器と移動体との距離が変化することおよび移動体の
速度によつて入力信号の時間変化率も変化するために、
移動体での受信入力レベルが大幅に変動し、一様な画質
の画面を得ることが困難であり、ベースバンド伝送では
画面に著しいフリツカが生じるという欠点を有してい
た。However, in such a conventional device, in order to cover a predetermined section of a predetermined path, the light emitter needs to cover a wide angular range, and reception can be performed in all of the predetermined section. Therefore, it is necessary to set the output level of the light emitting device with the farthest distance as a reference, and thus a high output light emitting device is required, which is economically problematic. Also,
Since the distance between the light emitter and the moving object changes and the speed of the moving object also changes the time change rate of the input signal,
The reception input level at the mobile unit fluctuates greatly, and it is difficult to obtain a screen with uniform image quality, and there is a drawback that significant flickering occurs on the screen in baseband transmission.
このような欠点を解決するためにこの発明は、経路上
の所定区間を複数の区域に分割するとともに、個々の区
域に対応して信号送出器を設けて、これら信号送出器を
一個所に集中配設し、各信号送出器は、それぞれ対応す
る区域までの距離が遠くなるにしたがって狭くなる指向
性を有し、各区域にわたって移動する移動体での受信レ
ベルがほぼ一定となるような出力レベルで、それぞれ対
応する区域に信号を送出するようにしたものである。In order to solve such a drawback, the present invention divides a predetermined section on a route into a plurality of areas, and provides a signal transmitter corresponding to each area so that these signal transmitters are concentrated in one place. Each signal transmitter has a directivity that becomes narrower as the distance to the corresponding area increases, and the output level is such that the reception level at the moving body moving across each area becomes almost constant. Then, signals are transmitted to the corresponding areas.
それぞれの信号送出器のカバー範囲が狭くなるので、
受信入力レベルを容易に高くすることができる。Since the coverage of each signal transmitter is narrowed,
The reception input level can be easily increased.
第１図はこの発明の一実施例を示す説明図である。同
図において、１は移動体の走行する経路であり、この経
路の端部の一箇所に発光器がまとめて設置されている。
移動体の走行する経路のうち所定区間Ｌを４つの区域L1
〜L4に分け、それぞれの区域を発光器2a〜2dによつてカ
バーしている。それぞれの発光器は第２図に示すように
θ１〜θ４の角度をカバーするとともに、その出力レベ
ルは受信入力レベルが略一定となるような値11〜14に設
定されている。FIG. 1 is an explanatory view showing an embodiment of the present invention. In the figure, reference numeral 1 denotes a route along which the moving body travels, and light emitters are collectively installed at one end of the route.
There are four sections L1 in the predetermined section L of the route traveled by the moving body.
~ L4, and each area is covered by light emitters 2a to 2d. As shown in FIG. 2, each light emitter covers the angles θ1 to θ4, and its output level is set to values 11 to 14 so that the reception input level becomes substantially constant.
このように構成することによつて、区域L1〜L4を走行
する移動体は第３図に示すようにレベル変化の少ない入
力信号を得ることができる。このため、ベースバンド伝
送でも所定区間の全範囲にわたつて良好な画質が得られ
る。With this configuration, the mobile body traveling in the areas L1 to L4 can obtain an input signal with a small level change, as shown in FIG. Therefore, even in baseband transmission, good image quality can be obtained over the entire range of the predetermined section.
なお、以上の実施例はベースバンド伝送について説明
したが、他の通信方式であつても良い。また、発光器は
発光ダイオードとレンズを適宜組み合わせることによつ
て実現することができる。In addition, although the above embodiments have described the baseband transmission, other communication methods may be used. Further, the light emitter can be realized by appropriately combining a light emitting diode and a lens.
以上説明したようにこの発明は、個々の指向性および
出力レベルの異なる複数の信号送出器によつて所定範囲
をカバーする信号を送出するようにしたので、各発光器
は特別に高出力のものを採用する必要がなくなり、経済
性が良くなるとともに、所定の経路を走行する移動体に
おける受信入力レベルを略一定にすることができるの
で、安定した画像が得られるという効果を有する。As described above, according to the present invention, a plurality of signal transmitters having different directivities and output levels are used to transmit signals covering a predetermined range. Therefore, each light emitter has a particularly high output. It is not necessary to adopt the method (1), the economy is improved, and the reception input level in the moving body traveling on the predetermined route can be made substantially constant, so that it is possible to obtain a stable image.
第１図はこの発明の一実施例を示す説明図、第２図は発
光器の特性を示す図、第３図は入力信号の変化を示す図
である。 １……経路、2a〜2d……発光器、Ｌ……区間、L1〜L4…
…区域、θ１〜θ４……角度。FIG. 1 is an explanatory diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing characteristics of a light emitter, and FIG. 3 is a diagram showing changes in an input signal. 1 ... Path, 2a-2d ... Light emitter, L ... Section, L1-L4 ...
Area, θ1 to θ4 ... Angle.
フロントページの続き (56)参考文献 特開 昭62−16635（ＪＰ，Ａ) 特開 昭62−16636（ＪＰ，Ａ) 実開 昭58−101549（ＪＰ，Ｕ)Continuation of the front page (56) References JP 62-16635 (JP, A) JP 62-16636 (JP, A) JP 58-101549 (JP, U)
Claims (1)
動体に対して地上側から信号を伝送する移動体用信号伝
送装置において、 経路上の所定区間を複数の区域に分割するとともに、個
々の区域に対応して信号送出器を設けて、これら信号送
出器を一個所に集中配設し、 各信号送出器は、それぞれ対応する区域までの距離が遠
くなるにしたがって狭くなる指向性を有し、各区域にわ
たって移動する移動体での受信レベルがほぼ一定となる
ような出力レベルで、それぞれ対応する区域に信号を送
出することを特徴とする移動体用信号伝送装置。1. A signal transmission device for a mobile body, which transmits a signal from the ground side to a mobile body passing through a predetermined section along a predetermined route, wherein the predetermined section on the route is divided into a plurality of sections, and Signal transmitters are provided corresponding to the individual areas, and these signal transmitters are centrally arranged at one place. A signal transmission device for a mobile body, which has a power level such that a reception level of the mobile body moving over each area is substantially constant, and sends the signal to the corresponding area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61032735A JPH084250B2 (en) | 1986-02-19 | 1986-02-19 | Mobile signal transmission equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61032735A JPH084250B2 (en) | 1986-02-19 | 1986-02-19 | Mobile signal transmission equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62193331A JPS62193331A (en) | 1987-08-25 |
| JPH084250B2 true JPH084250B2 (en) | 1996-01-17 |
Family
ID=12367092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61032735A Expired - Fee Related JPH084250B2 (en) | 1986-02-19 | 1986-02-19 | Mobile signal transmission equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH084250B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5829019B2 (en) * | 1979-01-08 | 1983-06-20 | 日立電子システムサ−ビス株式会社 | Optical relay method |
| JPH0666733B2 (en) * | 1985-07-15 | 1994-08-24 | 仙台市交通事業管理者 | Optical space transmission device for mobiles |
-
1986
- 1986-02-19 JP JP61032735A patent/JPH084250B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62193331A (en) | 1987-08-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |