JPS6031243B2 - Fixed point detection method for moving objects - Google Patents
Fixed point detection method for moving objectsInfo
- Publication number
- JPS6031243B2 JPS6031243B2 JP51079297A JP7929776A JPS6031243B2 JP S6031243 B2 JPS6031243 B2 JP S6031243B2 JP 51079297 A JP51079297 A JP 51079297A JP 7929776 A JP7929776 A JP 7929776A JP S6031243 B2 JPS6031243 B2 JP S6031243B2
- Authority
- JP
- Japan
- Prior art keywords
- leaky coaxial
- fixed point
- coaxial cable
- moving object
- magnetic field
- 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
Links
Landscapes
- Geophysics And Detection Of Objects (AREA)
Description
【発明の詳細な説明】
本発明は漏洩同軸ケーブル線路を利用した移動体の定点
通過検知方式に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for detecting a moving object passing through a fixed point using a leaky coaxial cable line.
漏洩同軸ケーブルに韓射遮断領域周波数の信号を給電す
るとケーブルの円周方向に誘導磁界が発生し、この誘導
磁界の円周方向成分は漏洩同軸ケーブルのスロット配列
とは無関係に一定である。When a leaky coaxial cable is supplied with a signal having a Korean radiation cutoff frequency, an induced magnetic field is generated in the circumferential direction of the cable, and the circumferential component of this induced magnetic field is constant regardless of the slot arrangement of the leaky coaxial cable.
一方漏洩同軸ケーブル線路は一般に複数本の漏洩同軸ケ
ーブルが継続接続されているのが常である。従って継続
接続されている隣接漏洩同軸ケーブルの誘導磁界の円周
方向成分が互いに逆相となるように韓射遮断領域周波数
の信号を給電してやり、この逆相の誘導磁界を移動体上
に設けられたアンテナでもつてキャッチしてやれば、移
動体の定点通過の検知が可能となる。この場合定点は漏
洩同軸ケーブル線路の接続部となる。On the other hand, in a leaky coaxial cable line, a plurality of leaky coaxial cables are generally continuously connected. Therefore, a signal with a frequency in the Korean radiation cutoff region is supplied so that the circumferential direction components of the induced magnetic fields of the continuously connected adjacent leaky coaxial cables are in opposite phases to each other, and this induced magnetic field of opposite phases is provided on the moving body. If a fixed antenna is used to catch it, it becomes possible to detect when a moving object passes a fixed point. In this case, the fixed point is the connection of the leaky coaxial cable line.
本発明は以上述べたような技術思想に基づいてなされた
もので、簡便で確実な移動体の定点通過検知方式の提供
を目的とする。以下図面を参照しながら本発明の一実施
例について説明する。The present invention has been made based on the above-mentioned technical idea, and aims to provide a simple and reliable method for detecting the passage of a moving body from a fixed point. An embodiment of the present invention will be described below with reference to the drawings.
漏洩同軸ケーブル１と１′は直流逆相接続器３を介して
接続される。The leaky coaxial cables 1 and 1' are connected via a DC reverse phase connector 3.
２，２′は接続用同軸コードである。2 and 2' are coaxial cords for connection.
波長が漏洩同軸ケーブル１，１′のスロット列の周期に
比べて十分大きいような低周波の信号を漏洩同軸ケーブ
ル１，１′に給電すると譲導磁界の円周方向成分は漏洩
同軸ケープルーと１′とでは互いに逆相になる。漏洩同
軸ケーブル１，１′の接続端部間隔ｄよりも大きな間隔
でもつて移動体上に設けられ、かつ誘導磁界の円周方向
成分と結合するような２個のループアンテナ４，４′が
漏洩同軸ケーフル１，１′の両端末に跨って存在すると
、ループアンテナ４と４′の受信信号は互いに逆相とな
り、移動体が定点を通過したことが検知される。When a low-frequency signal whose wavelength is sufficiently larger than the period of the slot row of the leaky coaxial cables 1, 1' is fed to the leaky coaxial cables 1, 1', the circumferential component of the yielding magnetic field becomes the leaky coaxial cable 1, 1'. ′ are in reverse phase with each other. Two loop antennas 4, 4' are provided on the moving body with a distance greater than the distance d between the connecting ends of the leaky coaxial cables 1, 1', and are coupled to the circumferential component of the induced magnetic field. When present across both terminals of coaxial cables 1 and 1', the received signals of loop antennas 4 and 4' have opposite phases to each other, and it is detected that a moving object has passed a fixed point.
直流逆相接続器３は例えば第２図に示すような構成であ
る。即ち、平衡−不平衡変換器５，５′を用いて接続用
同軸コード２，２′と平衡導体７，７′を接続し、平衡
導体７，７′により接続用同軸コード２の内部導体と２
′の外部導体とが、また２つの外部導体と２′の内部導
体とが電気的に接続される。以上説明したように本発明
によれば移動体の定点通過検知をする場合、地上側に漏
洩同軸ケーブル線路と独立した他の装置を設ける必要が
なくなり、また検知精度の上でも優れた移動体の定点通
過検知方式が得られる。The DC reverse phase connector 3 has a configuration as shown in FIG. 2, for example. That is, the connecting coaxial cords 2, 2' and the balanced conductors 7, 7' are connected using the balanced-unbalanced converters 5, 5', and the inner conductor of the connecting coaxial cord 2 and the internal conductor of the connecting coaxial cord 2 are connected by the balanced conductors 7, 7'. 2
The two outer conductors and the inner conductor 2' are electrically connected to each other. As explained above, according to the present invention, when detecting a moving object passing a fixed point, there is no need to provide another device on the ground side that is independent of the leaky coaxial cable line, and the detection accuracy is also improved. A fixed point passage detection method is obtained.
第１図は本発明の一実施例の説明図、第２図は直流逆相
接続器の説明図である。
１，１′：漏洩同軸ケーブル、２：接続用同軸コード、
３：直流逆相接続器、４：ループアンテナ、５：平衡−
不平衡変換器、６：平衡導体。
第１図第２図FIG. 1 is an explanatory diagram of one embodiment of the present invention, and FIG. 2 is an explanatory diagram of a DC reverse phase connector. 1, 1': Leaky coaxial cable, 2: Coaxial cord for connection,
3: DC reverse phase connector, 4: Loop antenna, 5: Balanced -
Unbalanced converter, 6: Balanced conductor. Figure 1 Figure 2
Claims (1)
軸ケーブル線路に於て、該漏洩同軸ケーブルは直流逆相
接続器を介して接続することにより、隣接する漏洩同軸
ケーブルの近傍に生ずる誘導磁界の円周方向成分が互い
に逆相となるように輻射遮断領域周波数の信号が前記漏
洩同軸ケーブル線路に給電されており、この誘導磁界の
円周方向成分の変化を移動体に設けたループアンテナで
受信することにより移動体の定点通過を検知することを
特徴とする移動体の定点通過検知方式。1. In a leaky coaxial cable line that is continuously connected along the travel path of a moving object, the leaky coaxial cable is connected via a DC reverse phase connector to reduce the induction that occurs near the adjacent leaky coaxial cable. A signal with a frequency in the radiation cut-off region is fed to the leaky coaxial cable line so that the circumferential components of the magnetic field are in opposite phases to each other, and a loop antenna provided on a moving object changes the circumferential component of the induced magnetic field. A method for detecting a moving object passing through a fixed point, characterized in that it detects when a moving object passes through a fixed point by receiving signals from the receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP51079297A JPS6031243B2 (en) | 1976-07-02 | 1976-07-02 | Fixed point detection method for moving objects |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP51079297A JPS6031243B2 (en) | 1976-07-02 | 1976-07-02 | Fixed point detection method for moving objects |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS534584A JPS534584A (en) | 1978-01-17 |
| JPS6031243B2 true JPS6031243B2 (en) | 1985-07-20 |
Family
ID=13685900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP51079297A Expired JPS6031243B2 (en) | 1976-07-02 | 1976-07-02 | Fixed point detection method for moving objects |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6031243B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58134238A (en) * | 1982-02-04 | 1983-08-10 | Matsushita Electric Ind Co Ltd | Electromagnetic clutch |
| JPS59157125U (en) * | 1983-04-08 | 1984-10-22 | 小倉クラツチ株式会社 | electromagnetic spring clutch |
-
1976
- 1976-07-02 JP JP51079297A patent/JPS6031243B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS534584A (en) | 1978-01-17 |
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