JPH02179489A - Transmitter controller - Google Patents

Abstract

PURPOSE:To prevent the interference between the radiowaves from radio transmitters and to make it possible to receive data accurately by controlling the outputs of a plurality of radio transmitters which are provided in close proximity, and transmitting the signals at the different times. CONSTITUTION:Beacon transmitters 1a and 1b transmit signals to a receiver 3 which is provided in a vehicle 2 such as a bus. The transmitters 1a and 1b are provided in close proximity. In this constitution, the vehicle 2 on a read A is guided to either of a road B or a road C at the junction of the three rods. At this time, two signals S1 and S2 having the time difference are transmitted from the transmitters 1a and 1b to the receiver 3 which is mounted on the vehicle 2. Even if the transmitters 1a and 1b are arranged in close proximity, the radiowaves S1 and S2 from both transmitters are not interfered. Therefore, even though the vehicle is located within the interfering zone D, the receiver 3 can receive the detailed data accurately.

Description

Translated fromJapanese

【発明の詳細な説明】〔産業上の利用分野〕本発明は複数個近接して設けられ送信機間の電波の干渉
を解消する送信機制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a transmitter control device that eliminates radio wave interference between a plurality of transmitters installed in close proximity.

〔従来技術〕[Prior art]

走行中の車両の現在地を推定する車載用航法装置には第
５図に示すように、ビーコン送信ｔＭ１ａ、ｌｂ・・を
道路の各所に配置し、このビーコン送信機１ａ、ｌｂか
らの電波Ｓ１、Ｓ２を車両２に配備したビーコン受信機
３が受信し、この受信信号に基づいて車両の現在位置を
推定するものがある。そして、このシステムでできるだ
け正確な位置推定ができるようにするには、ビーコン送
信機ｌａ、ｌｂをできるだけ近接して配置する必要があ
る。As shown in FIG. 5, the in-vehicle navigation system that estimates the current location of a running vehicle has beacon transmitters tM1a, lb, etc. placed at various locations on the road, and radio waves S1, There is a system in which the beacon receiver 3 installed in the vehicle 2 receives S2 and estimates the current position of the vehicle based on this received signal. In order to enable this system to estimate the position as accurately as possible, it is necessary to place the beacon transmitters la and lb as close as possible.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

ところで、上記のようにビーコン送信機１ａ、１ｂを近
接して設けると、送信時には相互の電波Ｓｌ、Ｓ２が重
なり合って干渉範囲りが生じ干渉しあうことになる。こ
のため、車両２に搭載されたビーコン受信器３ではデー
タを正確に受信することができないばかりでなく、干渉
を恐れて詳細なデータを送信することができない等不都
合が生ずるという課題がある。By the way, when the beacon transmitters 1a and 1b are provided close to each other as described above, the radio waves Sl and S2 overlap each other during transmission, resulting in an interference range and interference with each other. Therefore, there are problems in that the beacon receiver 3 mounted on the vehicle 2 is not only unable to accurately receive data, but also cannot transmit detailed data for fear of interference.

本発明は上記課題を解決すべく創案されたものであって
、ビーコン送信機が近接して設けられた場合でも、より
詳細なデータを正確にデータを送受信することができる
送信機制御装置を提供しようとするものである。The present invention was created to solve the above problems, and provides a transmitter control device that can accurately transmit and receive more detailed data even when beacon transmitters are installed in close proximity. This is what I am trying to do.

〔課題を解決するための手段〕[Means to solve the problem]

本発明は上記目的を達成するために、複数個近接して設
けられた無線送信機と、各無線送信機からの出力を時間
差を有して発信させる制御手段とを備えて構成された。In order to achieve the above-mentioned object, the present invention includes a plurality of wireless transmitters installed in close proximity to each other, and a control means for transmitting the output from each wireless transmitter with a time difference.

〔作用〕[Effect]

本発明の構成によれば、複数個近接して設けられた無線
送信機は制御手段に制御されてそれぞれ時間がずれて発
信する。According to the configuration of the present invention, a plurality of wireless transmitters provided close to each other are controlled by the control means and transmit signals at different times.

〔実施例〕〔Example〕

本発明を図面に示すされた一実施例に基づいて説明する
。The present invention will be explained based on an embodiment shown in the drawings.

第１図及び第２図はそれぞれ別々のビーコン送信機から
発信している状態の回路図、第３図はビーコン送信機の
配置図、第４図は各ビーコン送信機からの発信される電
波のタイミノグチヤードである。Figures 1 and 2 are circuit diagrams of the state in which signals are being transmitted from separate beacon transmitters, Figure 3 is a layout diagram of the beacon transmitters, and Figure 4 is a diagram of the radio waves transmitted from each beacon transmitter. This is Taiminoguchiard.

第２図に示すビーコン送信機１ａ、１ｂはバス等の車両
２に設けられたビーコン受信機３に信号を発信するもの
であり、ビーコン送信機１ａ、１ｂは第３図に示すよう
に極めて近接して設けられている。すなわち、第３図で
は道路Ａ、Ｂ、Ｃがある三叉路の分岐点Ｐに位置して、
道路の両側にビーコン送信機１ａ、１ｂが配置されてお
り、ビーコン送信機１ａ、１ｂにより道路Ａ上にある車
両２を道路Ｂ又は道路Ｃに誘導するとき等に使用される
。このビーコン送信機１ａ、１ｂは回線４ａ、４ｂを介
して送信機能統括ユニット４に接続されている。この送
信機能統括ユニット４は通常使用されるコンピュータに
より構成されており制御プログラムに基づいて種々の制
御を行うが、特に、ビーコン送信機１ａ、ｌｂからそれ
ぞれ出力される電波３１．Ｓｌを時間差を有してビーコ
ン受信ｔａ３に発信する。第４図は双方の電波Ｓｌ、Ｓ
ｌが発信されるタイミングを示し、Ｈレヘルで電波Ｓ１
が発信する一方電波Ｓ２が発信を停止、Ｌレヘルで電波
１ａの発信が停止する一方電波Ｓ２が発信する。Beacon transmitters 1a and 1b shown in FIG. 2 transmit signals to a beacon receiver 3 installed in a vehicle 2 such as a bus, and the beacon transmitters 1a and 1b are located very close together as shown in FIG. It is provided. That is, in Fig. 3, it is located at a branch point P of a three-way intersection where roads A, B, and C are located.
Beacon transmitters 1a and 1b are arranged on both sides of the road, and are used when guiding a vehicle 2 on road A to road B or road C using the beacon transmitters 1a and 1b. The beacon transmitters 1a, 1b are connected to the transmission function integrated unit 4 via lines 4a, 4b. This transmission function generalization unit 4 is constituted by a commonly used computer and performs various controls based on a control program, and in particular, controls the radio waves 31 . Sl is transmitted to the beacon receiver ta3 with a time difference. Figure 4 shows both radio waves Sl and S.
Indicates the timing at which l is transmitted, and radio wave S1 is transmitted at H level.
transmits, while the radio wave S2 stops transmitting, and while the radio wave 1a stops transmitting at L level, the radio wave S2 starts transmitting.

なお、Ｄは電波Ｓ１、Ｓｌが同時に発信された場合に双
方が重なり合って干渉を生ずる干渉範囲である。Note that D is an interference range where, when the radio waves S1 and S1 are transmitted at the same time, they overlap and cause interference.

かかる構成において、いま、道路Ａ上にある車両３を三
叉路Ｏで道路Ｂ又は道路Ｃのいずれかに誘導するように
なときには、車両２に搭載したビーコン受信機３に対し
て、第４ｒＩ！Ｊに示すタイミングにより、まずビーコ
ン送信機ｌａ力）ら電波Ｓ１が発信され（第１図の状！
３）、次いで時間がずれてビーコン送信機１ｂから電波
Ｓ２が発信される（第２図の状態）。In this configuration, when the vehicle 3 on the road A is to be guided to either the road B or the road C at the three-way intersection O, the 4th rI! At the timing shown in J, a radio wave S1 is first transmitted from the beacon transmitter (as shown in Figure 1).
3) Next, the beacon transmitter 1b transmits a radio wave S2 at a time lag (the state shown in FIG. 2).

このようにビーコン送信機１ａ、ｌｂからはそれぞれ別
々に時間をおいて信号が発信され、ビーコン送信機１ａ
、１ｂが近接して配置された場合でも双方からの電波１
、Ｓｌは干渉が生ずることがないので、干渉範囲りに車
両２が位置したとしてもビーコン受信機３では詳細なデ
ータを正確に受信することができる。In this way, signals are transmitted from the beacon transmitters 1a and lb separately at different times, and the beacon transmitters 1a and lb transmit signals at different times.
, 1b are placed close to each other, the radio waves 1 from both
, Sl do not cause interference, so even if the vehicle 2 is located within the interference range, the beacon receiver 3 can accurately receive detailed data.

〔発明の効果〕〔Effect of the invention〕

以上の説明から明らかなように、本発明によれば、無線
送信機が近接して複数個設けられていても、各無線送信
機は時間がずれて信号が発信され、各無線送信機間の電
波の干渉を防止することができるので、干渉範囲にある
無線受信機でも詳細なデータを誤りなく正確に受信する
ことができる。As is clear from the above description, according to the present invention, even if a plurality of wireless transmitters are provided close to each other, each wireless transmitter transmits a signal at a different time, and Since radio wave interference can be prevented, even wireless receivers within the interference range can receive detailed data accurately without errors.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本発明に関する送信機制御装置の一実施例を示し
、第１図及び第２図はそれぞれ別々のビーコン送信機か
ら発信している状態の回路図、第３図はビーコン送信機
の配置図、第４図は各ビーコン送信機からの発信される
電波のタイミングチャート、第５図は従来例の配置図で
ある。（主要部分を示す図面の簡単な説明）ｌａ、ｌｂ・・ビーコン送信機２・・車両　　　　３・・ビーコン受信機４・・送信機
能統括ユニットＳｌ、Ｓｌ・・電波Ｄ・・干渉範囲図面の浄譜内ｇに変更なし）一フ；／＋）＋−′−：二亦房ｉ・シ）第４図“」］−「Ｌ丁］」−りThe drawings show an embodiment of the transmitter control device according to the present invention, and FIGS. 1 and 2 are circuit diagrams in which signals are transmitted from separate beacon transmitters, and FIG. 3 is a layout diagram of the beacon transmitters. , FIG. 4 is a timing chart of radio waves transmitted from each beacon transmitter, and FIG. 5 is a layout diagram of a conventional example. (Brief explanation of drawings showing main parts) la, lb...Beacon transmitter 2...Vehicle 3...Beacon receiver 4...Transmission function control unit Sl, Sl...Radio wave D...Cleaning of interference range drawing No change in g in the music) 1F;/+)+-'-: 2 I-bō i・shi) Figure 4 ""]-"L-cho]"-ri

Claims (1)

Translated fromJapanese

【特許請求の範囲】[Claims]複数個近接して設けられた無線送信機と、各無線送信機
からの出力を時間差を有して発信させる制御手段とを備
えて構成された送信機制御装置。A transmitter control device configured to include a plurality of wireless transmitters provided in close proximity to each other and a control means for transmitting outputs from each wireless transmitter with a time difference.