JPH10256958A - Inductive radio antenna and inductive communication system - Google Patents
Inductive radio antenna and inductive communication systemInfo
- Publication number
- JPH10256958A JPH10256958A JP9056366A JP5636697A JPH10256958A JP H10256958 A JPH10256958 A JP H10256958A JP 9056366 A JP9056366 A JP 9056366A JP 5636697 A JP5636697 A JP 5636697A JP H10256958 A JPH10256958 A JP H10256958A
- Authority
- JP
- Japan
- Prior art keywords
- antenna
- wire
- parallel
- antennas
- inductive
- 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
- 230000001939 inductive effect Effects 0.000 title claims description 12
- 230000006698 induction Effects 0.000 claims abstract description 18
- 230000017105 transposition Effects 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 10
- 230000008878 coupling Effects 0.000 description 8
- 238000010168 coupling process Methods 0.000 description 8
- 238000005859 coupling reaction Methods 0.000 description 8
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
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- Near-Field Transmission Systems (AREA)
- Mobile Radio Communication Systems (AREA)
- Details Of Aerials (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、誘導無線用アンテ
ナ、特に平行二線式誘導通信線に沿って移動する移動体
に搭載の誘導無線装置に接続するアンテナ、及び誘導通
信システムに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inductive radio antenna, and more particularly, to an antenna connected to an inductive radio device mounted on a moving body moving along a parallel two-wire inductive communication line, and an inductive communication system. .
【０００２】[0002]
【従来の技術】新都市交通、クレーン等の決った軌道上
を移動する移動体の誘導無線用アンテナは、平行二線式
誘導通信線に沿って移動する。図７は従来の例を示し、
１は地上設備（ＦＩＸ）の送受信装置であり、２は線路
結合器（ＬＣ）で、二線の誘導線（Ｌ１）４、（Ｌ２）
５とマッチングを取るための機器である。誘導線４，５
はＬＣ２から二線平行に架設し、途中撚架した交点Ａを
経て絡端抵抗器（Ｒ）３に結合する。Ｒ３はＬ１，Ｌ２
の誘導線とマッチングを取るための機器である。2. Description of the Related Art An inductive wireless antenna of a moving body moving on a fixed track such as a new city traffic or a crane moves along a parallel two-wire type guide communication line. FIG. 7 shows a conventional example,
1 is a transmission / reception device of the ground equipment (FIX), 2 is a line coupler (LC), and two lead wires (L1) 4, (L2)
5 is a device for matching. Guidance lines 4, 5
Is installed in parallel with two lines from LC2, and is connected to the end resistor (R) 3 via the intersection A which is twisted in the middle. R3 is L1, L2
It is a device to take matching with the guide wire.
【０００３】アンテナ（ＡＮＴ）７１は平行二線の誘導
線４，５に沿って移動する。このアンテナ７１の詳細は
図９に示すように、導体を何回か巻いた空芯のループア
ンテナである。An antenna (ANT) 71 moves along two parallel guide lines 4 and 5. As shown in FIG. 9, the details of the antenna 71 are an air-core loop antenna in which a conductor is wound several times.
【０００４】アンテナ７１と誘導線４，５の相対関係の
側面図を図８に示す。誘導線４，５に流れる高周波電流
ｉが作る磁界Ｈｉがアンテナ７１と交錯する。これによ
りアンテナ７１には受信レベルが得られ、誘導無線通信
が行なえる。なお、誘導線４，５は、近傍に布線してあ
る他のケーブルによる誘導障害を防ぐために平行二線の
誘導線を撚架する必要があり撚架点Ａが形成される。FIG. 8 is a side view showing the relative relationship between the antenna 71 and the guide wires 4 and 5. As shown in FIG. The magnetic field Hi generated by the high-frequency current i flowing through the induction wires 4 and 5 crosses the antenna 71. As a result, a reception level is obtained at the antenna 71, and guided wireless communication can be performed. The guide wires 4 and 5 need to be twisted two parallel wires in order to prevent a guide failure caused by another cable laid in the vicinity, and a twist point A is formed.
【０００５】[0005]
【発明が解決しようとする課題】今、アンテナ７１を受
信システムとして用いたとき、アンテナ７１が移動して
撚架点Ａを通過すると、高周波電流ｉが作る磁界Ｈｉと
ループアンテナ７１の磁束錯交数が０となり受信レベル
に断点を生じる（図１０）。Now, when the antenna 71 is used as a receiving system, when the antenna 71 moves and passes through the twist point A, the magnetic field Hi generated by the high-frequency current i and the magnetic flux of the loop antenna 71 intersect. The number becomes 0 and a break occurs in the reception level (FIG. 10).
【０００６】またアンテナ７１は、図１１に示すよう
に、雑音電流によっても影響を受ける。The antenna 71 is also affected by a noise current, as shown in FIG.
【０００７】図１１のＬｎは移動体車両内の艤装ケーブ
ル等の雑音源となる線で、これに流れる雑音電流ｉｎが
磁界Ｈｎを作り、アンテナ７１がこの磁界Ｈｎの影響を
受ける。[0007] Ln in FIG. 11 is a line serving as a noise source such as an outfitting cable in a mobile vehicle. A noise current in flowing through the line creates a magnetic field Hn, and the antenna 71 is affected by the magnetic field Hn.
【０００８】本発明の目的は、移動体における移動局ア
ンテナの受信雑音レベルの低減をはかり、かつ、地上設
備側の受信雑音の低域をはかるために平行二線式誘導通
信線の撚架点における受信レベルの断点を無くすことに
ある。SUMMARY OF THE INVENTION It is an object of the present invention to reduce the reception noise level of a mobile station antenna in a mobile body and to reduce the level of the reception noise on the terrestrial equipment side by using a twisting point of a parallel two-wire inductive communication line. Is to eliminate the point of the reception level in the above.
【０００９】[0009]
【課題を解決するための手段】上記の目的は、平行二線
式誘導線の撚架点以外において各誘導線に各々密結合す
る２つのアンテナを逆向に接続した第１のアンテナと、
平行二線式誘導線の撚架点においてのみ誘導線と結合す
る８字アンテナとを設け、上記第１のアンテナと８字ア
ンテナとを合成したことによって達成される。SUMMARY OF THE INVENTION The object of the present invention is to provide a first antenna in which two antennas each of which are tightly coupled to each of the guide wires other than the point where the parallel two-wire guide wire is twisted are connected in the opposite direction;
This is achieved by providing a figure-eight antenna that couples to the guide wire only at the point where the parallel two-wire type guide wire is twisted, and combining the first antenna and the figure-eight antenna.
【００１０】上記の手段によれば、第１のアンテナは、
平行二線式誘導線の撚架点以外において各誘導線に各々
密結合する２つのアンテナを逆向に接続したことによっ
て、２つのアンテナは各誘導線の１８０°位相の異なる
電流が作る磁界を検出し、それを逆向に接続して合成し
ているので、平行二線誘導線からは受信レベルが得られ
るが、艤装ケーブル等の雑音電流による磁界からの検出
は２つのアンテナが打消し合うから雑音障害は無くな
る。[0010] According to the above means, the first antenna includes:
By connecting two antennas that are tightly coupled to each lead wire in opposite directions except at the point where the parallel two-wire guide wire is twisted, the two antennas detect the magnetic field created by currents of each lead wire that are 180 ° out of phase. Since they are connected in the opposite direction and combined, the reception level can be obtained from the parallel two-wire induction wire, but the detection from the magnetic field due to the noise current of the outfitting cable etc. is because the two antennas cancel each other out. The obstacle is gone.
【００１１】また、８字アンテナは、平行二線式誘導線
の撚架点においてのみ誘導線と結合し、撚架点では受信
レベルが得られるが、撚架点以外の所では結合しないの
で雑音レベルが無くなる。したがって、この第１のアン
テナと８字アンテナを合成したアンテナの受信レベルは
断点が無くなり雑音障害も発生しない。The figure-eight antenna is coupled to the induction wire only at the point of twist of the parallel two-wire type induction wire, and a reception level can be obtained at the point of twist. The level is gone. Therefore, the reception level of the antenna obtained by combining the first antenna and the figure-eight antenna has no break, and no noise disturbance occurs.
【００１２】[0012]
【発明の実施の形態】以下本発明の実施の形態を図面に
より説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１３】図１は、本発明の一実施形態を示し、平行
二線式誘導線（Ｌ１）４、（Ｌ２）５、その他、従来と
同符号は同一部分を示す。アンテナ（ＡＮＴ１）６とア
ンテナ（ＡＮＴ２）７は誘導線４，５直下に密結合し、
図２で示すように、各々誘導線４，５に流れる１８０°
位相の異なる高周波電流ｉが作る磁界Ｈｉを検出してい
る。そして各アンテナ６，７を逆向きに接続して合成レ
ベルを得ている。FIG. 1 shows an embodiment of the present invention. In FIG. 1, the same reference numerals as those in the conventional art denote the same parts as those in the parallel two-wire type guide wires (L1) 4, (L2) 5, and others. The antenna (ANT1) 6 and the antenna (ANT2) 7 are tightly coupled just below the guide wires 4 and 5,
As shown in FIG. 2, 180 ° flowing through the guide wires 4 and 5, respectively.
The magnetic field Hi generated by the high-frequency current i having a different phase is detected. Then, the antennas 6 and 7 are connected in opposite directions to obtain a combined level.
【００１４】したがって、図３に説明するように、外部
のケーブル等が作る磁界（雑音）Ｈｎによって各アンテ
ナ６，７に検出される受信レベルは逆向きに加え合さ
れ、キャンセルして雑音電圧Ｖｎの受信は無くなる。Therefore, as explained in FIG. 3, the reception levels detected by the antennas 6 and 7 due to the magnetic field (noise) Hn generated by the external cable and the like are added in the opposite directions, canceled, and the noise voltage Vn is canceled. Will no longer be received.
【００１５】また図１のように、アンテナとして、８字
アンテナ（ＡＮＴ８）８が設けられている。この８字ア
ンテナ８は、ループアンテナをセンターで８の字に撚架
したものである。そして、この８字アンテナ８を誘導線
４，５の撚架点を通過するように設ける。８字アンテナ
８は図４に示すように、誘導線４，５及び他のケーブル
Ｌｎによる起電力はキャンセルされて出力しない。唯一
誘導線４，５の撚架点Ａにおいてのみ結合し受信レベル
が得られる。As shown in FIG. 1, a figure-eight antenna (ANT8) 8 is provided as an antenna. This figure-eight antenna 8 is obtained by twisting a loop antenna into a figure eight at the center. The eight-shaped antenna 8 is provided so as to pass through the point where the guide wires 4 and 5 are twisted. As shown in FIG. 4, the eight-shaped antenna 8 cancels the electromotive force generated by the induction wires 4 and 5 and the other cable Ln, and does not output. The reception level is obtained by coupling only at the stranded point A of the guide wires 4 and 5.
【００１６】図５の（ａ）は、アンテナ（ＡＮＴ１）６
とアンテナ（ＡＮＴ２）７の合成レベルで、撚架点Ａで
レベルか断となる。また図の（ｂ）は８字アンテナ（Ａ
ＮＴ８）８の受信レベルを示し、撚架点Ａのみでレベル
が高上る。したがってアンテナ６，７，８を合成するこ
とによって平行二線式誘導線４，５の全エリアに渡って
受信レベルを高く維持できる。FIG. 5A shows an antenna (ANT1) 6
In the composite level of the antenna and the antenna (ANT2) 7, the level is cut off at the twist point A. (B) of the figure shows an 8-shaped antenna (A
NT8) 8 indicates the reception level, and the level rises only at the twist point A. Therefore, by combining the antennas 6, 7, 8 it is possible to maintain a high reception level over the entire area of the parallel two-wire guide wires 4, 5.
【００１７】図６は、アンテナ６，７，及び８字アンテ
ナ８を合成したアンテナの構成を示し、各アンテナ出力
を結合器９から受信機又は送信機に接続する。これによ
り外部の雑音に対しては結合せず、２つの平行誘導線に
流れる電流のみに結合し、かつ誘導線の撚架点において
断点が発生しないアンテナを得ることができる。FIG. 6 shows an antenna configuration in which the antennas 6, 7, and the figure-eight antenna 8 are combined, and each antenna output is connected from the coupler 9 to a receiver or a transmitter. As a result, it is possible to obtain an antenna that is not coupled to external noise but is coupled only to the current flowing through the two parallel induction wires and does not cause a break at the point where the induction wires are twisted.
【００１８】なお、アンテナは受信アンテナとして用い
るときは、誘導線に流れる電流ｉにより作られる磁界Ｈ
ｉを受信し移動体の受信機に受信レベルを供給するが、
送信アンテナとして用いるときは、移動体に搭載した送
信機に接続され、アンテナより発生する磁界により誘導
線に送信電流を誘起して地上局へ送信する。When the antenna is used as a receiving antenna, the magnetic field H generated by the current i flowing through the induction wire
i and supplies the reception level to the mobile receiver,
When used as a transmission antenna, the antenna is connected to a transmitter mounted on a mobile body, and induces a transmission current in an induction wire by a magnetic field generated by the antenna to transmit the current to a ground station.
【００１９】[0019]
【発明の効果】以上説明したように、近年車両搭載機器
の電子化により、インバータ電源等の発生する誘導無線
帯の雑音増加に伴い、車両の引き通しケーブル等に重畳
する雑音レベルの増加が著しく、車両のアンテナへの誘
導障害が多くなっているが、本発明の実施により、この
誘導障害を低減し通信品質の向上を図ることが出来る。As described above, the level of noise superimposed on a cable passing through a vehicle or the like significantly increases with the increase in noise in an inductive radio band generated by an inverter power supply or the like due to the recent computerization of equipment mounted on a vehicle. However, the number of obstacles for guidance to the antenna of the vehicle is increasing. However, by implementing the present invention, the guidance obstacles can be reduced and the communication quality can be improved.
【００２０】又地上設備においても、誘導線の近傍に布
線してある他のケーブルによる誘導障害を防ぐ為に平行
２線の誘導線を撚架する必要があるが、本発明によれ
ば、この撚架点における回線の断を無くすことができ
る。Also, in the ground equipment, it is necessary to twist two parallel guide wires in order to prevent a guide fault caused by another cable laid in the vicinity of the guide wire. Breakage of the circuit at this twist point can be eliminated.
【図１】本発明の一実施形態の誘導線とアンテナの結合
構成図。FIG. 1 is a configuration diagram of a coupling between an induction wire and an antenna according to an embodiment of the present invention.
【図２】図１のアンテナの誘導線との結合の説明図。FIG. 2 is an explanatory diagram of coupling of the antenna of FIG. 1 with a guide wire.
【図３】図１のアンテナの外部磁界との結合の説明図。FIG. 3 is an explanatory diagram of coupling of the antenna of FIG. 1 with an external magnetic field.
【図４】図１の８字アンテナの誘導線との結合の説明
図。FIG. 4 is an explanatory diagram of coupling of the figure-eight antenna of FIG. 1 with a guide wire.
【図５】本発明の一実施形態の各アンテナの受信レベル
の説明図。FIG. 5 is an explanatory diagram of a reception level of each antenna according to the embodiment of the present invention.
【図６】本発明の一実施形態の合成アンテナの構成図。FIG. 6 is a configuration diagram of a combined antenna according to one embodiment of the present invention.
【図７】従来の誘導線とアンテナの結合構成図。FIG. 7 is a configuration diagram of a conventional coupling between an induction wire and an antenna.
【図８】図７のアンテナの誘導線との結合の説明図。FIG. 8 is an explanatory diagram of coupling of the antenna of FIG. 7 with a guide wire.
【図９】ループアンテナの詳細図。FIG. 9 is a detailed view of a loop antenna.
【図１０】ループアンテナの受信レベルの説明図。FIG. 10 is an explanatory diagram of a reception level of a loop antenna.
【図１１】ループアンテナの外部磁界との結合の説明
図。FIG. 11 is an explanatory diagram of coupling of a loop antenna with an external magnetic field.
１…地上設備（送受信装置）、２…線路結合器、３…終
端抵抗器、４…誘導線（Ｌ１）、５…誘導線（Ｌ２）、
６…アンテナ（ＡＮＴ１）、７…アンテナ（ＡＮＴ
２）、８…８字アンテナ（ＡＮＴ８）、Ａ…撚架点。DESCRIPTION OF SYMBOLS 1 ... Ground equipment (transmitter / receiver), 2 ... Line coupler, 3 ... Terminating resistor, 4 ... Lead wire (L1), 5 ... Lead wire (L2),
6: Antenna (ANT1), 7: Antenna (ANT)
2), 8 ... 8-shaped antenna (ANT8), A: Twist point.
Claims (2)
用アンテナにおいて、平行二線式誘導線の撚架点以外お
いて各誘導線に各々密結合する２つのアンテナを逆向に
接続した第１のアンテナと、上記平行二線式誘導線の撚
架点においてのみ誘導線と結合する８字アンテナとを設
け、上記第１のアンテナと８字アンテナとを合成したこ
とを特徴とする誘導無線用アンテナ。1. An induction wireless antenna tightly coupled to a parallel two-wire induction wire, wherein two antennas each tightly coupled to each of the induction wires are connected in opposite directions except at a point where the parallel two-wire guidance wire is twisted. A first antenna and a figure-eight antenna coupled to a guide wire only at a point where the parallel two-wire type guide wire is twisted, and the first antenna and the figure-eight antenna are combined. Radio antenna.
を、平行二線式誘導通信線に沿って移動する移動体に搭
載の無線装置に接続したことを特徴とする誘導通信シス
テム。2. An inductive communication system, wherein the inductive wireless antenna according to claim 1 is connected to a wireless device mounted on a moving body that moves along a parallel two-wire inductive communication line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9056366A JPH10256958A (en) | 1997-03-11 | 1997-03-11 | Inductive radio antenna and inductive communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9056366A JPH10256958A (en) | 1997-03-11 | 1997-03-11 | Inductive radio antenna and inductive communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10256958A true JPH10256958A (en) | 1998-09-25 |
Family
ID=13025267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9056366A Pending JPH10256958A (en) | 1997-03-11 | 1997-03-11 | Inductive radio antenna and inductive communication system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10256958A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010154175A (en) * | 2008-12-25 | 2010-07-08 | Futaba Corp | Mobile body remote control system |
-
1997
- 1997-03-11 JP JP9056366A patent/JPH10256958A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010154175A (en) * | 2008-12-25 | 2010-07-08 | Futaba Corp | Mobile body remote control system |
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