JPH08162839A - Gate type antenna - Google Patents

Gate type antenna

Info

Publication number
JPH08162839A
JPH08162839A JP6303681A JP30368194A JPH08162839A JP H08162839 A JPH08162839 A JP H08162839A JP 6303681 A JP6303681 A JP 6303681A JP 30368194 A JP30368194 A JP 30368194A JP H08162839 A JPH08162839 A JP H08162839A
Authority
JP
Japan
Prior art keywords
antenna
angle
transponder
members
gate
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
Application number
JP6303681A
Other languages
Japanese (ja)
Inventor
Tomoji Yano
智司 矢野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHIKUSANYO DENSHI GIJUTSU KENK
CHIKUSANYO DENSHI GIJUTSU KENKYU KUMIAI
Original Assignee
CHIKUSANYO DENSHI GIJUTSU KENK
CHIKUSANYO DENSHI GIJUTSU KENKYU KUMIAI
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by CHIKUSANYO DENSHI GIJUTSU KENK, CHIKUSANYO DENSHI GIJUTSU KENKYU KUMIAI filed Critical CHIKUSANYO DENSHI GIJUTSU KENK
Priority to JP6303681A priority Critical patent/JPH08162839A/en
Publication of JPH08162839A publication Critical patent/JPH08162839A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To prevent a dead angle in the sensitivity by crossing each antenna member at an angle not interfered with each other at radiation or reception of a radio wave and providing a winding to generate an electromagnetic field over a wide frequency band to be immune to the effect of the directivity characteristic and to provide a wide frequency band directivity. CONSTITUTION: In the gate antenna A, loop antenna members 1, 2 are formed by winding plural number of turns, of a conductor with excellent conductivity and less in self-loss and the antenna members 1, 2 are crossed at a prescribed angle. A continuous conductor wire is used for the plural antenna members 1, 2 is wound to generate an electromagnetic field over a wide frequency band at an angle not interfered with each other at radiation or reception of a radio wave. The gate antenna A formed as above is adjusted to a best point of the operating frequency with a tuning capacitor 3 for series resonance and a magnetic flux generated by the gate antenna A dose not take a right angle to a coil of a transponder B.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は電磁誘導方式の固体識別
に使用される質問読取り器のループアンテナに関し、詳
しくは牛、豚、馬等の大動物の固体識別に使用される無
電池型の耳標型トランスポンダ、或いは皮下装着型のト
ランスポンダとの組み合わせで有効なループアンテナの
改良に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interrogation reader loop antenna used for electromagnetic induction type identification, and more particularly to a battery-less type used for identification of large animals such as cows, pigs and horses. The present invention relates to improvement of a loop antenna which is effective in combination with an ear tag type transponder or a subcutaneously mounted transponder.

【0002】[0002]

【従来の技術】従来、IDデータキャリア利用の実績の
最も多い分野はFA分野であり、自動車の組立・加工ラ
イン、物品供給システム、及び物流システム等によって
進歩してきた。しかしこれらは、データキャリアが決め
られた位置に固定されていたり、接触又は至近距離を通
過するようにしたものが殆どであったので、故障しない
限り通信が出来なかったりする心配は比較的少なかっ
た。
2. Description of the Related Art Conventionally, the field in which ID data carriers have been used most is the FA field, which has been advanced by automobile assembly / processing lines, article supply systems, physical distribution systems, and the like. However, in most of these cases, the data carrier was fixed at a fixed position, or most of them were arranged so that they could come into contact with each other or pass through a close range, so there was relatively little concern that communication would not be possible unless a failure occurred. .

【0003】しかし、これらをそのまま動物の管理等に
利用すると、牛、豚、馬などの大動物においては特に予
測のつかない動きをするので、通信できない場合が多く
発生する。特に、電磁誘導方式の無電池型のトランスポ
ンダにおいてはさらに通信不可の事態が発生しやすくな
る。何故ならば、電磁誘導方式の動作原理は、読取り器
のループアンテナ(コイル)に問い合わせの為の信号電
流が流れると磁界が発生し、トランスポンダのアンテナ
コイルには、この磁界の変化を打ち消す方向に電流(誘
導電流)が生じる。この時トランスポンダは、電気を蓄
える。蓄えた電気を使ってトランスポンダのコイルに回
答の為の信号電流が流れると磁界を介して、読取り器の
コイルに誘導電流が生じ、読取り器側で受信する。読み
取られたデータは、そのまま家畜の識別コードとして読
取り器の表示装置上に表示されたり、或いは外部機器に
送り出される。る。
However, if these are used as they are for the management of animals and the like, large animals such as cows, pigs and horses make unpredictable movements, so that communication often fails. In particular, in a battery-less transponder of the electromagnetic induction system, a situation in which communication is impossible is more likely to occur. This is because the principle of operation of the electromagnetic induction method is that a magnetic field is generated when a signal current for inquiry is passed through the loop antenna (coil) of the reader, and the antenna coil of the transponder is in the direction of canceling this change in magnetic field. An electric current (induced current) is generated. At this time, the transponder stores electricity. When a signal current for responding to the coil of the transponder flows using the stored electricity, an induced current is generated in the coil of the reader via the magnetic field and is received by the reader. The read data is displayed as it is as a livestock identification code on the display device of the reader, or is sent to an external device. You.

【発明が解決しようとする課題】即ち、上記した電磁誘
導方式にあっては、問い合わせ信号のエネルギーを返信
信号に使うマイクロパワートランスポンダでは電力をア
ンテナコイル内を通る磁束の大きさに頼らざるを得な
い。そこで、単一指向性のアンテナでは当然、感度死角
が出来てしまうので、読取り器(問い合わせ側)のアン
テナを被識別家畜に対し至近距離まで近付けたり、のれ
ん型の接触アンテナを使用したりして対応しているのが
実情で、そのため自動化は至難であった。
That is, in the electromagnetic induction method described above, the micropower transponder that uses the energy of the inquiry signal as the reply signal must rely on the magnitude of the magnetic flux passing through the antenna coil. Absent. Therefore, a unidirectional antenna naturally creates a blind spot, so the reader (inquiry side) antenna should be brought close to the animal to be identified, or a goodwill-type contact antenna should be used. The reality is that they are compatible, and automation was extremely difficult.

【0004】本発明は上述したような従来の技術が有す
る問題点に鑑みてなされたもので、その目的とするとこ
ろは、指向特性の影響を受けにくいアンテナに広域指向
特性を持たせ感度死角のないアンテナを提供することに
ある。
The present invention has been made in view of the problems of the prior art as described above, and an object of the present invention is to provide an antenna that is not easily influenced by the directional characteristics with a wide-range directional characteristic and reduce the sensitivity blind spot. Not to provide an antenna.

【0005】[0005]

【課題を解決するための手段】上記の目的を達成する為
に本発明が講じた技術的手段は、非接触、及びアンテナ
内通過で目的を達成する為、導電性に優れ自己損失の少
ない導線をループ状に巻回してアンテナ部材を複数個構
成し、それらアンテナ部材を角度を変えて交差させた構
成を特徴とする。そして、複数のアンテナ部材の交差角
は所定の角度に固定しても、或いは交差角度を可変出来
るようにしてもよい。
The technical means taken by the present invention in order to achieve the above object is to achieve the object by non-contact and passing through the inside of the antenna. Is wound in a loop to form a plurality of antenna members, and the antenna members are crossed at different angles. The crossing angle of the plurality of antenna members may be fixed at a predetermined angle, or the crossing angle may be variable.

【0006】上記の複数のアンテナ部材を構成する導線
は連続した一本で、電波の発射または受信時に干渉しな
いような角度で、広帯域に電磁場を発生できるように巻
線されている。そして、ループ状の導線は、周囲状況、
環境、或いは気象状況によって侵されない合成樹脂材等
の材質で密封し、雨中或いは水中でも使用可能な構成と
する。
The above-described plurality of antenna members are made up of a single continuous wire, which is wound so as to generate an electromagnetic field in a wide band at an angle that does not interfere with the emission or reception of radio waves. And the loop-shaped conductor is
It shall be sealed in a material such as synthetic resin that is not affected by the environment or weather conditions, so that it can be used in rain or water.

【0007】[0007]

【作用】上記の手段によれば、交差組み合わせたループ
状のアンテナ部材に電流を流すと夫々のアンテナ部材に
よって生じる磁束が合成され、それにより磁束に対しト
ランスポンダのコイルが直角となる状況が発生しにくく
なり、死角のないアンテナが完成される。そして、アン
テナ部材の交差角度を可変し得る構成とした場合は使用
状況に合わせて最適な指向特性に設定することができ
る。
According to the above-mentioned means, when a current is passed through the loop-shaped antenna members which are cross-combined, the magnetic fluxes generated by the respective antenna members are combined, which causes a situation in which the coil of the transponder is at a right angle to the magnetic flux. It becomes difficult and the antenna with no blind spot is completed. When the crossing angle of the antenna members is variable, it is possible to set the optimum directional characteristics in accordance with the usage situation.

【0008】[0008]

【実施例】以下、本発明の一実施例を図面に基づき説明
すると、図1は質問読取り装置の概略を示し、図中、A
は本発明に係るゲートアンテナ、3は同調用コンデン
サ、4はトランシーバ、Bは家畜の皮下に装着したトラ
ンスポンダである。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an outline of a question reading device.
Is a gate antenna according to the present invention, 3 is a tuning capacitor, 4 is a transceiver, and B is a transponder mounted under the skin of livestock.

【0009】上記のゲートアンテナAは、導電性に優れ
自己損失の少ない導線を複数回巻回してでループ状のア
ンテナ部材1,2を形成し、そのアンテナ部材1,2を
所定の角度、例えば30゜〜45゜の角度で交差させて
構成されている。そのアンテナ部材1,2における導線
の巻回は整列して巻回するために、合成樹脂製のケース
6内部に、通孔7を接近して開設した支持板8を所定間
隔毎に起立固定し、その支持板8相互間の通孔7に亘っ
てパイプ9を配管固定し、そうしたパイプ9内に導線10
を挿入配線し、ケース6の開口部は蓋板11で密閉閉鎖さ
れている。
The gate antenna A described above has a loop-shaped antenna member 1 or 2 formed by winding a conductive wire having excellent conductivity and low self-loss multiple times, and the antenna member 1 or 2 is formed at a predetermined angle, for example. It is constructed by intersecting at an angle of 30 ° to 45 °. In order to wind the conductor wires in the antenna members 1 and 2 in an aligned manner, the support plate 8 having the through holes 7 close thereto is erected and fixed at predetermined intervals inside the case 6 made of synthetic resin. , The pipe 9 is fixed by piping over the through holes 7 between the support plates 8 and the conductor 10
Is inserted and wired, and the opening of the case 6 is hermetically closed by a cover plate 11.

【0010】又、ゲートアンテナAを構成するループ状
のアンテナ部材1,2は図示するように所定の角度で交
差固定してもよいが、ループ状のアンテナ部材1と2は
その交差角度を任意に可変出来るようにケース部材をヒ
ンジ構造で連結してもよいものである。更に、図示した
実施例は2個のアンテナ部材を組み合わせた形態を示し
たが、アンテナ部材の組み合わせ個数は2個に限らず、
3個又は4個以上でも良いが、トランスポンダBを装着
した家畜(被識別固体)が通過する為には、通過させる
に支障をきたさない開口を確保する必要があり、その為
の開口を考慮して組み合わせるようにする。
Further, the loop-shaped antenna members 1 and 2 constituting the gate antenna A may be cross-fixed at a predetermined angle as shown in the figure, but the loop-shaped antenna members 1 and 2 may have any crossing angle. The case members may be connected by a hinge structure so as to be variable. Furthermore, although the illustrated embodiment shows a form in which two antenna members are combined, the number of antenna members combined is not limited to two,
Three or four or more may be used, but in order for livestock (identified solids) equipped with transponder B to pass through, it is necessary to secure an opening that does not hinder the passage, and consider the opening for that purpose. And combine them.

【0011】上記の如く構成したゲートアンテナAは、
直列共振させるための同調用コンデンサ3で使用周波数
最良点に調整し、ゲートアンテナAが発生する磁束がト
ランスポンダBのコイルbに対して直角となる状況が生
じないようになる。それによって、家畜に装着されたト
ランスポンダBが交信範囲内であれば、どの位置、方向
にあっても、ゲートアンテナの磁束がトランスポンダB
のコイルに平行にならず、コイル内を通る磁束密度も大
きく、交信感度も良好となる。即ち、磁束の方向とトラ
ンスポンダBのコイルbによる感度の良否を図5に示す
と、(a)コイルbに対し磁束が直交する状態が最良
で、(b)コイルbに対し磁束が平行になると最悪で、
(c)コイルbに対し磁束が交叉する場合は最良ではな
いが良の交信状態が得られる。
The gate antenna A constructed as described above is
The tuning capacitor 3 for causing series resonance is adjusted to the best use frequency, so that the magnetic flux generated by the gate antenna A is not perpendicular to the coil b of the transponder B. Therefore, if the transponder B attached to the livestock is within the communication range, the magnetic flux of the gate antenna will be generated at any position and direction.
Is not parallel to the coil, the magnetic flux density passing through the coil is large, and the communication sensitivity is good. That is, FIG. 5 shows whether the direction of the magnetic flux and the sensitivity of the coil b of the transponder B are good or bad. (A) When the magnetic flux is orthogonal to the coil b, (b) When the magnetic flux is parallel to the coil b, At worst,
(C) When the magnetic flux crosses the coil b, a good communication state is obtained although it is not the best.

【0012】上述した機能により、トランスポンダを装
着した家畜がどの様な姿勢、方向でもゲートアンテナA
を通過すれば交信が行われ、トランスポンダBに記憶さ
れているデータが自動的に読み取られることになり、飼
育管理の自動化が容易となる。又、家畜等の大動物に限
らず、小動物等でも、上記の構成によって同様の専用ゲ
ートを作ることによって、同様な利用ができる。更に、
本発明に係るアンテナの特徴は水中でも失われないの
で、水中動物、魚類等についても有効である。又、人間
用にも、IDカードを持っていれば、洋服のポケットや
鞄からIDカードを一々出さなくとも、ポケットに或い
は鞄に入れたままゲートアンテナ内を通過することでデ
ータのチェックができ、利用範囲は広範囲になる。
Due to the above-mentioned function, the gate antenna A can be used regardless of the posture and direction of the livestock with the transponder.
After passing through, communication is performed and the data stored in the transponder B is automatically read, facilitating automation of breeding management. Further, not only large animals such as livestock but also small animals can be used in the same manner by forming the same dedicated gate with the above configuration. Furthermore,
Since the characteristics of the antenna according to the present invention are not lost even in water, it is also effective for underwater animals, fish and the like. Also, for humans, if you have an ID card, you can check the data by passing through the gate antenna in the pocket or in the bag without having to take out the ID card one by one from the clothes pocket or bag. , The range of use becomes wide.

【0013】[0013]

【発明の効果】本発明のアンテナは請求項1に示す構成
により、感度死角のないゲートアンテナを提供すること
ができる。それにより、大動物では耳標型トランスポン
ダや皮下装着型のトランスポンダとの組み合わせ使用に
よってデータの自動読み取りが可能となり、従来至難と
されていた、家畜等の飼育管理の自動かが容易となる。
又、請求項2に示す構成とした場合は、使用状況に応じ
た最適な交信感度を得ることが出来るものである。
The antenna of the present invention can provide a gate antenna having no sensitivity blind spot due to the structure described in claim 1. As a result, it is possible to automatically read data in a large animal by using it in combination with an ear target type transponder or a transcutaneous type transponder, which facilitates the automatic management of breeding of livestock, which has been difficult in the past.
Further, in the case of the structure described in claim 2, it is possible to obtain the optimum communication sensitivity according to the use situation.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明に係るアンテナの一実施例を示す概略図
である。
FIG. 1 is a schematic view showing an embodiment of an antenna according to the present invention.

【図2】アンテナを構成するアンテナ部材の内部構造を
示す部分拡大断面図である。
FIG. 2 is a partially enlarged cross-sectional view showing an internal structure of an antenna member that constitutes an antenna.

【図3】図2の(3)−(3)線に沿える縦断面図であ
る。
FIG. 3 is a vertical sectional view taken along line (3)-(3) of FIG.

【図4】図1に示すアンテナが発生する磁束の状態を示
す説明図である。
FIG. 4 is an explanatory diagram showing a state of magnetic flux generated by the antenna shown in FIG.

【図5】磁束の方向とトランスポンダのコイルによる感
度の関係を示す説明図である。
FIG. 5 is an explanatory diagram showing the relationship between the direction of magnetic flux and the sensitivity of the transponder coil.

【符号の説明】[Explanation of symbols]

A…ゲートアンテナ B…トランスポンダ 1,2…アンテナ部材 10…導線 b…トランスポンダのコイル A ... Gate antenna B ... Transponder 1, 2 ... Antenna member 10 ... Conductive wire b ... Transponder coil

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 導線でループ状のアンテナ部材を複数個
形成すると共に、それら各アンテナ部材は互いに電波の
発射又は受信時に干渉しないような角度で交差させ、広
帯域に電磁場を発生できるように巻線したことを特徴と
するアンテナ。
1. A plurality of loop-shaped antenna members are formed by conducting wires, and these antenna members are crossed at an angle so as not to interfere with each other at the time of emitting or receiving radio waves, and a winding is provided so as to generate an electromagnetic field in a wide band. An antenna that is characterized by
【請求項2】 上記のループ状アンテナ部材の交差角度
を可変調節自在としたことを特徴とするアンテナ。
2. An antenna, wherein the crossing angle of the loop-shaped antenna member is variably adjustable.
JP6303681A 1994-12-07 1994-12-07 Gate type antenna Pending JPH08162839A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6303681A JPH08162839A (en) 1994-12-07 1994-12-07 Gate type antenna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6303681A JPH08162839A (en) 1994-12-07 1994-12-07 Gate type antenna

Publications (1)

Publication Number Publication Date
JPH08162839A true JPH08162839A (en) 1996-06-21

Family

ID=17923962

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6303681A Pending JPH08162839A (en) 1994-12-07 1994-12-07 Gate type antenna

Country Status (1)

Country Link
JP (1) JPH08162839A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0748586A2 (en) * 1995-06-13 1996-12-18 Chikusanyou Densi Gijutu Kenkyu Kumiai System for identifying livestock and other individuals
JP2010231523A (en) * 2009-03-27 2010-10-14 Sumitomo Osaka Cement Co Ltd Method for reading/writing ic tag and ic tag reader
US8154465B2 (en) 2005-09-20 2012-04-10 Allflex Australia Pty. Limited Portal antenna
JP2014500479A (en) * 2010-10-12 2014-01-09 フューチャー テクノロジー(センサーズ)リミテッド Sensor assembly
JP2015106888A (en) * 2013-12-02 2015-06-08 日本放送協会 Non-directional antenna
CN109301478B (en) * 2018-08-16 2023-11-28 广东省现代农业装备研究所 Feeding trough with antenna

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0748586A2 (en) * 1995-06-13 1996-12-18 Chikusanyou Densi Gijutu Kenkyu Kumiai System for identifying livestock and other individuals
EP0748586A3 (en) * 1995-06-13 1997-12-17 Chikusanyou Densi Gijutu Kenkyu Kumiai System for identifying livestock and other individuals
US8154465B2 (en) 2005-09-20 2012-04-10 Allflex Australia Pty. Limited Portal antenna
JP2010231523A (en) * 2009-03-27 2010-10-14 Sumitomo Osaka Cement Co Ltd Method for reading/writing ic tag and ic tag reader
JP2014500479A (en) * 2010-10-12 2014-01-09 フューチャー テクノロジー(センサーズ)リミテッド Sensor assembly
JP2015106888A (en) * 2013-12-02 2015-06-08 日本放送協会 Non-directional antenna
CN109301478B (en) * 2018-08-16 2023-11-28 广东省现代农业装备研究所 Feeding trough with antenna

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