JPH09259241A - Transmission head for electromagnetically coupled id device - Google Patents
Transmission head for electromagnetically coupled id deviceInfo
- Publication number
- JPH09259241A JPH09259241A JP8072232A JP7223296A JPH09259241A JP H09259241 A JPH09259241 A JP H09259241A JP 8072232 A JP8072232 A JP 8072232A JP 7223296 A JP7223296 A JP 7223296A JP H09259241 A JPH09259241 A JP H09259241A
- Authority
- JP
- Japan
- Prior art keywords
- transmission
- coil
- electromagnetic field
- head
- 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.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 118
- 230000006698 induction Effects 0.000 claims abstract description 56
- 230000008878 coupling Effects 0.000 claims abstract description 10
- 238000010168 coupling process Methods 0.000 claims abstract description 10
- 238000005859 coupling reaction Methods 0.000 claims abstract description 10
- 230000005672 electromagnetic field Effects 0.000 claims description 62
- 238000009826 distribution Methods 0.000 abstract description 27
- 230000000694 effects Effects 0.000 abstract description 7
- 230000002411 adverse Effects 0.000 abstract description 3
- 239000000696 magnetic material Substances 0.000 description 10
- 239000000126 substance Substances 0.000 description 9
- 238000013500 data storage Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002887 superconductor Substances 0.000 description 1
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、駐車場等における
ゲート開閉システム、レジャー施設における人員の入退
出管理システム、工場における部品や製造物の認識シス
テム、商品の流通管理システム等に用いられる、非接触
方式のＩＤ装置の中の一つである電磁結合型ＩＤ装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gate opening / closing system in a parking lot, a staff entry / exit management system in a leisure facility, a system for recognizing parts and products in a factory, a product distribution management system, and the like. The present invention relates to an electromagnetic coupling type ID device which is one of contact type ID devices.
【０００２】[0002]
【従来の技術】従来の技術の電磁結合型ＩＤシステムの
送信ヘッドを図４〜図５に基づいて説明する。図４は電
磁結合型ＩＤシステムのブロック図である。図５は送信
ヘッドの説明図であり、図５（ａ）は送信ヘッドの側面
の断面図、図５（ｂ）は送信ヘッドの正面図である。2. Description of the Related Art A transmission head of a conventional electromagnetically coupled ID system will be described with reference to FIGS. FIG. 4 is a block diagram of the electromagnetically coupled ID system. 5A and 5B are explanatory views of the transmission head, FIG. 5A is a side sectional view of the transmission head, and FIG. 5B is a front view of the transmission head.
【０００３】図４において、Ａは送信ヘッド、Ｂはデー
タキャリアを示す。送信ヘッドＡは、外部制御装置Ｃに
接続されており、レジャー施設の出入口や、製造ライン
の所定位置に据え置かれるものである。データキャリア
は、人間が所持したり、製造物に取着するものである。In FIG. 4, A is a transmission head and B is a data carrier. The transmission head A is connected to the external control device C and is placed at the entrance of a leisure facility or at a predetermined position on the manufacturing line. Data carriers are carried by humans or attached to products.
【０００４】送信ヘッドＡは、自らが放出する誘導電磁
界によってデータキャリアＢと電磁結合することによっ
て、電源としての電磁エネルギーをデータキャリアＢに
供給するとともに、データキャリアＢをアクセスしてデ
ータキャリアＢとの間でデジタルデータの送受信を行う
ものである。The transmitting head A supplies electromagnetic energy as a power source to the data carrier B by electromagnetically coupling with the data carrier B by an induced electromagnetic field emitted by the transmitting head A, and accesses the data carrier B to access the data carrier B. It transmits and receives digital data to and from the PC.
【０００５】データキャリアＢは、送信ヘッドＡの放出
する誘導電磁界に結合して、自らが作動するための電源
としての電磁エネルギーを送信ヘッドＡから得るととも
に、送信ヘッドＡの放出する誘導電磁界に重畳されてい
るデジタルデータに基づいて、自己の記憶データを送出
したり、自己の記憶データを書き換えたりするものであ
る。[0005] The data carrier B is coupled to the inductive electromagnetic field emitted by the transmitting head A, obtains electromagnetic energy from the transmitting head A as a power source for operating itself, and generates the inductive electromagnetic field emitted by the transmitting head A. It transmits its own stored data or rewrites its own stored data based on the digital data superimposed on the data.
【０００６】送信ヘッドＡは、主制御部１、インターフ
ェイス部２、送信回路に相当する変調部３、復調部４、
発振部５、送信コイル６、受信コイル７を備えている。The transmission head A includes a main control unit 1, an interface unit 2, a modulation unit 3 corresponding to a transmission circuit, a demodulation unit 4,
An oscillation unit 5, a transmission coil 6, and a reception coil 7 are provided.
【０００７】主制御部１は、送信ヘッドＡ全体を統括す
るものであり、インターフェイス部２を介して、外部制
御装置Ｃから入力される各種命令に基づいて、発振部５
の出力する１００ＫＨｚ程度の正弦波の発振信号を変調
部３によって変調する。The main control unit 1 controls the entire transmission head A, and receives an oscillating unit 5 based on various commands input from the external control device C via the interface unit 2.
Are modulated by the modulator 3.
【０００８】変調部３は、該変調した変調信号を送信コ
イル６に出力する。送信コイル６は、該変調した変調信
号を誘導電磁界として空間に放出する。[0008] The modulation section 3 outputs the modulated signal to the transmission coil 6. The transmission coil 6 emits the modulated signal into space as an induced electromagnetic field.
【０００９】また、主制御部１は、受信コイル７がピッ
クアップするとともに復調部４が復調した復調信号を受
け取り、該復調信号をインターフェイス部２を介して外
部制御装置Ｃに出力する。The main control unit 1 receives the demodulated signal picked up by the receiving coil 7 and demodulated by the demodulation unit 4 and outputs the demodulated signal to the external control device C via the interface unit 2.
【００１０】データキャリアＢは、主制御部８、データ
記憶部９、変調部１０、復調部１１、整流回路部１２、
送受信コイル１３、共振コンデンサ１４、１５とを備え
ている。The data carrier B includes a main control unit 8, a data storage unit 9, a modulation unit 10, a demodulation unit 11, a rectification circuit unit 12,
The transmission / reception coil 13 and the resonance capacitors 14 and 15 are provided.
【００１１】整流回路部１２は、データキャリアＢが送
信ヘッドＡの送信コイル６の放出する誘導電磁界到達領
域内に入ると、送受信コイル１３がピックアップする送
信ヘッドＡの送信コイル６の放出する誘導電磁界からデ
ータキャリアＢを作動するための電源電圧を生成し、主
制御部８、データ記憶部９、変調部１０、復調部１１に
給電する。なお、データ記憶部９は整流回路部１２から
の給電が途切れても、記憶内容が消滅しないようにＥＥ
ＰＲＯＭ等を用いる。When the data carrier B enters the induction electromagnetic field reaching area emitted by the transmission coil 6 of the transmission head A, the rectifier circuit section 12 causes the transmission coil 13 to pick up the induction emitted by the transmission coil 6 of the transmission head A. A power supply voltage for operating the data carrier B is generated from the electromagnetic field and supplied to the main control unit 8, the data storage unit 9, the modulation unit 10, and the demodulation unit 11. It should be noted that the data storage unit 9 performs EE so that the stored contents are not lost even if the power supply from the rectifier circuit unit 12 is interrupted.
A PROM or the like is used.
【００１２】整流回路部１２から給電を受ける復調部１
１は、送受信コイル１３がピックアップする送信コイル
６の放出する誘導電磁界を復調して、該復調信号を主制
御部８に出力する。Demodulation unit 1 receiving power from rectification circuit unit 12
1 demodulates the induced electromagnetic field emitted by the transmission coil 6 picked up by the transmission / reception coil 13 and outputs the demodulated signal to the main control unit 8.
【００１３】整流回路部１２から給電を受ける主制御部
８は、データキャリアＢ全体を統括する部分であり、復
調部１１の出力する復調信号に基づいて、データ記憶部
９から必要なデータを読み出して変調部１０に出力した
り、データ記憶部９の記憶データの一部を書き換えたり
する。The main controller 8, which receives power from the rectifier circuit 12, controls the entire data carrier B, and reads necessary data from the data storage 9 based on the demodulated signal output from the demodulator 11. The data is output to the modulation unit 10 or a part of the data stored in the data storage unit 9 is rewritten.
【００１４】整流回路部１２から給電を受ける変調部１
０は、送受信コイル１３と共振コンデンサ１４、１５と
が送信コイル６の放出する誘導電磁界に共振して生成す
る励振波である誘導電磁界を、主制御部８がデータ記憶
部９から読み出すところの例えばデータキャリアＢ固有
の識別番号データに基づいて変調する。そして、該変調
された励振波である誘導電磁界は、送受信コイル１３か
ら空間に放出される。Modulating unit 1 receiving power from rectifying circuit unit 12
0 indicates that the main control unit 8 reads from the data storage unit 9 an induction electromagnetic field which is an excitation wave generated by the transmission / reception coil 13 and the resonance capacitors 14 and 15 resonating with the induction electromagnetic field emitted by the transmission coil 6. For example, based on the identification number data unique to the data carrier B. Then, the induced electromagnetic field, which is the modulated excitation wave, is emitted from the transmission / reception coil 13 to the space.
【００１５】よって、送信ヘッドＡは、送受信コイル１
３の放出する、該データキャリアＢ固有の識別番号デー
タに基づいて変調された誘導電磁界を、受信コイル７に
てピックアップするとともに、復調部４にて復調し、該
データキャリアＢ固有の識別番号データをインターフェ
イス部２を介して外部制御装置Ｃに出力する。即ち、送
信ヘッドＡはデータキャリアＢから、データキャリアＢ
固有の識別番号データを読み出すことができる。Therefore, the transmitting head A is provided with the transmitting and receiving coil 1
3, the induced electromagnetic field modulated based on the identification number data unique to the data carrier B is picked up by the receiving coil 7 and demodulated by the demodulation unit 4 to obtain the identification number unique to the data carrier B. The data is output to the external control device C via the interface unit 2. That is, the transmission head A moves from the data carrier B to the data carrier B
The unique identification number data can be read.
【００１６】以上のようにして構成される送信ヘッドＡ
の各部分は、図５（ａ）、図５（ｂ）に示すように、ケ
ーシング１６に収納されている。ケーシング１６は、正
面部１６ａ、背面部１６ｂ、側面部１６ｃ，１６ｄ，１
６ｅ，１６ｆよりなる樹脂等の非磁性体材料で形成され
た箱体である。即ち、ケーシング１６には、送信コイル
６、受信コイル７、基板部Ｐ１、Ｐ２が内設されてい
る。The transmission head A configured as described above
Each part of is stored in the casing 16 as shown in FIGS. 5 (a) and 5 (b). The casing 16 includes a front surface portion 16a, a rear surface portion 16b, side surface portions 16c, 16d, 1
The box body is made of a non-magnetic material such as resin made of 6e and 16f. That is, the casing 16 has the transmitting coil 6, the receiving coil 7, and the substrate portions P1 and P2 provided therein.
【００１７】そして、ケーシング１６の正面部１６ａは
送信コイル６のデータの送信方向（以下、前方と記す）
を覆い、背面部１６ｂは送信コイル６のデータの送信方
向と反対側の方向（以下、後方と記す）を覆い、側面部
１６ｃ，１６ｄ，１６ｅ，１６ｆは、送信コイル６の径
方向の外側を覆う。The front portion 16a of the casing 16 is in the data transmission direction of the transmission coil 6 (hereinafter referred to as "front").
The rear surface portion 16b covers a direction opposite to the data transmission direction of the transmission coil 6 (hereinafter, referred to as rear), and the side surface portions 16c, 16d, 16e, 16f cover the outer side in the radial direction of the transmission coil 6. cover.
【００１８】なお、基板部Ｐ１，Ｐ２上には、前記主制
御部１、インターフェイス部２、変調部３、復調部４、
発振部５が設けられている。On the board portions P1 and P2, the main control portion 1, the interface portion 2, the modulation portion 3, the demodulation portion 4,
The oscillator 5 is provided.
【００１９】[0019]
【発明が解決しようとする課題】しかしながら、上述の
図５（ａ）、図５（ｂ）に示すような送信ヘッドにあっ
ては、ケーシング１６が非磁性体であるため、送信ヘッ
ドＡの前方と後方との２方向に対して均等に誘導電磁界
が生じる。However, in the transmission head as shown in FIGS. 5 (a) and 5 (b), since the casing 16 is a non-magnetic material, the front side of the transmission head A is not formed. Induction electromagnetic fields are evenly generated in two directions, that is, rear and rear.
【００２０】そして、通信ヘッドＡの後方に鉄板等の磁
性体がある場合、該磁性体が誘導電磁界の分布に悪影響
を及ぼして、送信ヘッドＡからデータキャリアＢへのデ
ジタルデータの送信を失敗する場合があるという問題点
があった。When there is a magnetic material such as an iron plate behind the communication head A, the magnetic material adversely affects the distribution of the induction electromagnetic field and the transmission of digital data from the transmission head A to the data carrier B fails. There was a problem that there are cases.
【００２１】本発明は、上記問題点を改善するために成
されたもので、その目的とするところは、送信ヘッドの
周囲の磁性体の悪影響により送信ヘッドからデータキャ
リアへの間のデジタルデータの送信を失敗することな
く、確実にデジタルデータの授受を行うことのできる送
信ヘッドを提供することにある。The present invention has been made to solve the above problems, and an object of the present invention is to transfer digital data between a transmission head and a data carrier due to the adverse effect of a magnetic material around the transmission head. An object of the present invention is to provide a transmission head capable of reliably transmitting and receiving digital data without failing in transmission.
【００２２】[0022]
【課題を解決するための手段】本発明は上記の問題を解
決するために、請求項１記載の発明にあっては、誘導電
磁界を発生させて、近傍を通過するデータキャリアと電
磁結合する送信コイルと、データキャリアに送信する信
号に基づいて送信コイルに誘導電磁界を発生させる送信
回路と、送信コイルを内設するケーシングとを有する電
磁結合型ＩＤ装置の送信ヘッドにおいて、前記送信コイ
ルのデータ送信方向と反対側の外側に誘導電磁界を反射
する背面磁界反射部材を設けたことを特徴とするもので
ある。SUMMARY OF THE INVENTION In order to solve the above problems, the present invention resides in the invention set forth in claim 1 in which an induction electromagnetic field is generated and electromagnetically coupled to a data carrier passing in the vicinity thereof. A transmission head of an electromagnetic coupling type ID device, comprising: a transmission coil; a transmission circuit for generating an induction electromagnetic field in the transmission coil based on a signal transmitted to a data carrier; and a casing having the transmission coil therein. A back magnetic field reflecting member for reflecting an induction electromagnetic field is provided outside the side opposite to the data transmission direction.
【００２３】請求項２記載の発明にあっては、前記背面
磁界反射部材を延設して、コイルの径方向の外側に誘導
電磁界を反射する側面磁界反射部材を形成したことを特
徴とするものである。The invention according to claim 2 is characterized in that the back surface magnetic field reflecting member is extended to form a side surface magnetic field reflecting member for reflecting an induction electromagnetic field on the outer side in the radial direction of the coil. It is a thing.
【００２４】請求項３記載の発明にあっては、前記側面
反射部材の送信コイルのデータ送信方向側の端部を送信
コイルの径中心方向に延設して、誘導電磁界を反射する
磁界反射鍔部を形成したことを特徴とするものである。According to a third aspect of the present invention, the end portion of the side reflection member on the data transmission direction side of the transmission coil is extended in the radial center direction of the transmission coil to reflect the induction electromagnetic field. It is characterized in that the collar portion is formed.
【００２５】請求項４記載の発明にあっては、前記磁界
反射鍔部の送信コイルの送信方向側に、筒体であって誘
導電磁界を反射する磁界反射円筒部を連設したことを特
徴とするものである。According to a fourth aspect of the present invention, a cylindrical magnetic field reflecting cylindrical portion for reflecting an induction electromagnetic field is continuously provided on the transmission direction side of the transmitting coil of the magnetic field reflecting collar portion. It is what
【００２６】[0026]
【発明の実施の形態】本発明にかかる送信ヘッドの第一
実施の形態を図１に基づいて、第二実施の形態を図２に
基づいて、第三実施の形態を図３に基づいて説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a transmission head according to the present invention will be described with reference to FIG. 1, a second embodiment will be described with reference to FIG. 2, and a third embodiment will be described with reference to FIG. To do.
【００２７】〔第一実施の形態〕図１は送信ヘッドの説
明図であり、図１（ａ）は送信ヘッドの側面の断面図、
図１（ｂ）は送信ヘッドの正面図である。なお、図１に
おいては前述の従来の技術で説明したところの送信ヘッ
ドと同等の箇所には同じ符号を付してあるので、同等の
箇所の詳細な説明は省略する。[First Embodiment] FIG. 1 is an explanatory view of a transmission head. FIG. 1A is a sectional view of a side surface of the transmission head.
FIG. 1B is a front view of the transmission head. In FIG. 1, the same reference numerals are given to the same parts as those of the transmission head described in the above-described conventional technique, and the detailed description of the same parts will be omitted.
【００２８】図１に示す本実施の形態の送信ヘッドが、
前述の従来の技術で説明したところの送信ヘッドと異な
り特徴となるのは次の構成である。The transmission head of this embodiment shown in FIG.
The following configuration is different from the transmission head described in the above-described conventional technique and is characterized.
【００２９】即ち、背面磁界反射部材に相当する背面部
１７ｂ，側面磁界反射部材に相当する側面部１７ｃ，１
７ｄ，１７ｅ，１７ｆを、アルミニウム、銅、超伝導体
等の高導電率材にて形成した構成である。そして、ケー
シング１７の正面部１７ａは、従来の技術で説明したと
ころのものと同様に樹脂等の非磁性体材料にて形成す
る。That is, the back surface portion 17b corresponding to the back surface magnetic field reflecting member and the side surface portions 17c and 1 corresponding to the side surface magnetic field reflecting member.
7d, 17e, and 17f are formed of a high conductivity material such as aluminum, copper, or a superconductor. Then, the front portion 17a of the casing 17 is formed of a non-magnetic material such as resin similar to that described in the related art.
【００３０】従って、送信コイル６が生じさせた誘導電
磁界により、ケーシング１７の背面部１７ｂ、側面部１
７ｃ，１７ｄ，１７ｅ，１７ｆに渦電流が生じて、該渦
電流によって後方及び側方への誘導電磁界の分布がシー
ルドされ、送信コイル６の前方にのみ誘導電磁界を発生
させる。そして、後方及び側方に磁性体が存在していて
も、誘導電磁界の分布は該磁性体の影響を受けない。ま
た、前方に、誘導電磁界の分布が偏ることになり、誘導
電磁界の分布の指向性が向上し、伝送可能距離が向上す
る。Therefore, the back surface portion 17b and the side surface portion 1 of the casing 17 are caused by the induction electromagnetic field generated by the transmission coil 6.
Eddy currents are generated in 7c, 17d, 17e, and 17f, and the distribution of the induction electromagnetic field to the rear and the side is shielded by the eddy current, and the induction electromagnetic field is generated only in front of the transmission coil 6. Further, even if there is a magnetic substance in the rear and the side, the distribution of the induction electromagnetic field is not affected by the magnetic substance. Further, the distribution of the induction electromagnetic field is biased forward, the directivity of the distribution of the induction electromagnetic field is improved, and the transmittable distance is improved.
【００３１】〔第二実施の形態〕図２は送信ヘッドの説
明図であり、図２（ａ）は送信ヘッドの側面の断面図、
図２（ｂ）は送信ヘッドの正面図である。なお、図２に
おいては前述の第一実施の形態で説明したところの送信
ヘッドと同等の箇所には同じ符号を付してあるので、同
等の箇所の詳細な説明は省略する。[Second Embodiment] FIG. 2 is an explanatory view of a transmission head, and FIG. 2A is a side sectional view of the transmission head.
FIG. 2B is a front view of the transmission head. In FIG. 2, the same parts as those of the transmission head described in the first embodiment are designated by the same reference numerals, and detailed description of the same parts will be omitted.
【００３２】図２に示す本実施の形態の送信ヘッドが、
前述の第一実施の形態で説明したところの送信ヘッドと
異なり特徴となるのは次の構成である。The transmission head of this embodiment shown in FIG.
Unlike the transmission head described in the above-described first embodiment, the characteristic feature is the following configuration.
【００３３】即ち、ケーシング１７の正面部１７ａを、
正面部１７ａの径方向の外方であって、側面部１７ｃ，
１７ｄ，１７ｅ，１７ｆから連設され高導電率材で形成
した磁界反射鍔部に相当する鍔部１７ｇと、正面部１７
ａの径方向の内方であって非磁性体で形成した中央部１
７ｈとで構成である。That is, the front portion 17a of the casing 17 is
The outer side in the radial direction of the front surface portion 17a, the side surface portion 17c,
A flange portion 17g corresponding to a magnetic field reflecting flange portion formed of a high-conductivity material and continuously provided from 17d, 17e, and 17f, and a front portion 17
A central part 1 formed in the radial direction of a and made of a non-magnetic material
It consists of 7h.
【００３４】従って、送信コイル６が生じさせた誘導電
磁界により、ケーシング１７の背面部１７ｂ、側面部１
７ｃ，１７ｄ，１７ｅ，１７ｆ、鍔部１７ｇに渦電流が
生じて、該渦電流によって後方及び側方への誘導電磁界
の分布がシールドされる。そして、後方及び側方に磁性
体が存在していても、誘導電磁界の分布は該磁性体の影
響を受けない。Therefore, the back surface portion 17b and the side surface portion 1 of the casing 17 are caused by the induction electromagnetic field generated by the transmission coil 6.
An eddy current is generated in 7c, 17d, 17e, 17f and the collar portion 17g, and the eddy current shields the distribution of the induction electromagnetic field to the rear and side. Further, even if there is a magnetic substance in the rear and the side, the distribution of the induction electromagnetic field is not affected by the magnetic substance.
【００３５】更に、前方に、誘導電磁界は非磁性体であ
る中央部１７ｈを介してのみ外部に放出されるので分布
が偏り、更に誘導電磁界の分布の指向性が向上し、伝送
可能距離が向上する。Furthermore, since the induction electromagnetic field is emitted to the outside only through the central portion 17h which is a non-magnetic material, the distribution is biased, the directivity of the distribution of the induction electromagnetic field is further improved, and the transmittable distance is increased. Is improved.
【００３６】〔第三実施の形態〕図３は送信ヘッドの説
明図であり、図３（ａ）は送信ヘッドの側面の断面図、
図３（ｂ）は送信ヘッドの正面図である。なお、図３に
おいては前述の第二実施の形態で説明したところの送信
ヘッドと同等の箇所には同じ符号を付してあるので、同
等の箇所の詳細な説明は省略する。[Third Embodiment] FIG. 3 is an explanatory view of a transmission head, and FIG. 3A is a sectional view of a side surface of the transmission head.
FIG. 3B is a front view of the transmission head. In FIG. 3, the same parts as those of the transmission head described in the second embodiment are denoted by the same reference numerals, and detailed description of the same parts will be omitted.
【００３７】図３に示す本実施の形態の送信ヘッドが、
前述の第二実施の形態で説明したところの送信ヘッドと
異なり特徴となるのは次の構成である。The transmission head of the present embodiment shown in FIG.
Unlike the transmission head described in the second embodiment, the following configuration is characteristic.
【００３８】即ち、高導電率材である鍔部１７ｇと非磁
性体材料である１７ｈとの境界線から、鍔部１７ｇ端部
を前方に延設して磁界反射円筒部に相当する円筒部１７
ｉを形成し、非磁性体の中央部１７ｈは該円筒部１７ｉ
の先端部に設けた構成である。That is, the cylindrical portion 17 corresponding to a magnetic field reflecting cylindrical portion is formed by extending the end portion of the collar portion 17g forward from the boundary line between the collar portion 17g which is a high conductivity material and 17h which is a non-magnetic material.
i, and the central portion 17h of the non-magnetic material is the cylindrical portion 17i.
Is provided at the tip of the.
【００３９】従って、送信コイル６が生じさせた誘導電
磁界により、ケーシング１７の背面部１７ｂ、側面部１
７ｃ，１７ｄ，１７ｅ，１７ｆ、鍔部１７ｇ、円筒部１
７ｉに渦電流が生じて、該渦電流によって後方及び側方
への誘導電磁界の分布がシールドされる。そして、後方
及び側方に磁性体が存在していても、誘導電磁界の分布
は該磁性体の影響を受けない。Therefore, the back surface portion 17b and the side surface portion 1 of the casing 17 are caused by the induction electromagnetic field generated by the transmission coil 6.
7c, 17d, 17e, 17f, collar portion 17g, cylindrical portion 1
An eddy current is generated in 7i, and the eddy current shields the backward and lateral distribution of the induction electromagnetic field. Further, even if there is a magnetic substance in the rear and the side, the distribution of the induction electromagnetic field is not affected by the magnetic substance.
【００４０】更に、前方に、誘導電磁界は中央部１７ｈ
を介してのみ外部に放出され、また誘導電磁界の拡がり
は円筒部１７ｉによって規制されるので、誘導電磁界の
分布が偏り、更に誘導電磁界の分布の指向性が向上し、
伝送可能距離が向上する。Further, forward, the induction electromagnetic field is in the central portion 17h.
Is emitted to the outside only through the, and the spread of the induction electromagnetic field is regulated by the cylindrical portion 17i, the distribution of the induction electromagnetic field is biased, and the directivity of the distribution of the induction electromagnetic field is further improved.
The transmittable distance is improved.
【００４１】[0041]
【発明の効果】本発明の送信ヘッドは上述のように構成
してあるから、請求項１記載の発明にあっては、背面磁
界反射部材が誘導電磁界を反射し、送信コイルが生じさ
せた誘導電磁界により、背面磁界反射部材に渦電流が生
じて、該渦電流によって後方への誘導電磁界の分布がシ
ールドされるので、後方に磁性体が存在していても、誘
導電磁界の分布は該磁性体の影響を受けず、また、送信
コイルの前方に、誘導電磁界の分布が偏り、誘導電磁界
の分布の指向性を向上させ、伝送可能距離を向上させる
ことができる電磁結合型ＩＤ装置の送信ヘッドを提供で
きるという効果を奏する。Since the transmitting head of the present invention is constructed as described above, in the invention of claim 1, the back surface magnetic field reflecting member reflects the induced electromagnetic field and the transmitting coil causes it. The induced electromagnetic field causes an eddy current in the back surface magnetic field reflection member, and the backward induced electromagnetic field distribution is shielded by the eddy current. Therefore, even if a magnetic body is present behind, the induced electromagnetic field distribution Is not affected by the magnetic substance, and the distribution of the induction electromagnetic field is biased in front of the transmission coil, so that the directivity of the distribution of the induction electromagnetic field can be improved and the transmittable distance can be improved. It is possible to provide the transmission head of the ID device.
【００４２】請求項２記載の発明にあっては、請求項１
記載の発明の効果に加えて、側面磁界反射部材が誘導電
磁界を反射し、送信コイルが生じさせた誘導電磁界によ
り、側面磁界反射部材に渦電流が生じて、該渦電流によ
って後方への誘導電磁界の分布がシールドされるので、
送信コイルの側方に磁性体が存在していても、誘導電磁
界の分布は該磁性体の影響を受けず、また、送信コイル
の前方に、誘導電磁界の分布が偏り、誘導電磁界の分布
の指向性を更に向上させ、伝送可能距離を向上させるこ
とができる電磁結合型ＩＤ装置の送信ヘッドを提供でき
るという効果を奏する。According to the second aspect of the present invention, there is provided the first aspect.
In addition to the effects of the invention described, the side surface magnetic field reflection member reflects the induction electromagnetic field, and the induction electromagnetic field generated by the transmission coil causes an eddy current in the side surface magnetic field reflection member, which causes backward movement. Since the distribution of the induction electromagnetic field is shielded,
Even if there is a magnetic substance on the side of the transmission coil, the distribution of the induction electromagnetic field is not affected by the magnetic substance, and in front of the transmission coil, the distribution of the induction electromagnetic field is biased and The effect that the directivity of distribution can be further improved and the transmission distance of the electromagnetic coupling type ID device can be provided can be provided.
【００４３】請求項３記載の発明にあっては、請求項２
記載の発明の効果に加えて、磁界反射鍔部が誘導電磁界
を反射するので、前方に、誘導電磁界は鍔部が形成する
中央部を介してのみ外部に放出されるので分布が偏り、
誘導電磁界の分布の指向性を更に向上させ、伝送可能距
離を向上させることができる電磁結合型ＩＤ装置の送信
ヘッドを提供できるという効果を奏する。According to the invention of claim 3, claim 2
In addition to the effects of the invention described, since the magnetic field reflection collar portion reflects the induction electromagnetic field, the distribution is biased because the induction electromagnetic field is emitted to the outside only through the central portion formed by the collar portion in the front.
The directivity of the distribution of the induction electromagnetic field can be further improved, and the transmission head of the electromagnetic coupling type ID device capable of improving the transmittable distance can be provided.
【００４４】請求項４記載の発明にあっては、請求項３
記載の発明の効果に加えて、磁界反射円筒部が誘導電磁
界を反射し、誘導電磁界は鍔部によって形成される中央
部を介してのみ外部に放出され、また誘導電磁界の拡が
りは磁界反射円筒部によって規制されるので、誘導電磁
界の分布が偏り、誘導電磁界の分布の指向性を更に向上
させ、伝送可能距離を向上させることができる電磁結合
型ＩＤ装置の送信ヘッドを提供できるという効果を奏す
る。According to the invention of claim 4, claim 3
In addition to the effects of the invention described, the magnetic field reflecting cylindrical portion reflects the induction electromagnetic field, the induction electromagnetic field is emitted to the outside only through the central portion formed by the collar portion, and the spread of the induction electromagnetic field is the magnetic field. Since it is regulated by the reflective cylindrical portion, the distribution of the induction electromagnetic field is biased, the directivity of the distribution of the induction electromagnetic field is further improved, and the transmission head of the electromagnetic coupling type ID device that can improve the transmittable distance can be provided. Has the effect.
【図１】本発明の第一実施形態の送信ヘッドの説明図で
あり、（ａ）は送信ヘッドの側面の断面図、（ｂ）は送
信ヘッドの正面図である。FIG. 1 is an explanatory view of a transmission head according to a first embodiment of the present invention, (a) is a side sectional view of the transmission head, and (b) is a front view of the transmission head.
【図２】本発明の第二実施形態の送信ヘッドの説明図で
あり、（ａ）は送信ヘッドの側面の断面図、（ｂ）は送
信ヘッドの正面図である。2A and 2B are explanatory views of a transmission head according to a second embodiment of the present invention, FIG. 2A is a sectional view of a side surface of the transmission head, and FIG. 2B is a front view of the transmission head.
【図３】本発明の第三実施形態の送信ヘッドの説明図で
あり、（ａ）は送信ヘッドの側面の断面図、（ｂ）は送
信ヘッドの正面図である。3A and 3B are explanatory views of a transmission head according to a third embodiment of the present invention, FIG. 3A is a side sectional view of the transmission head, and FIG. 3B is a front view of the transmission head.
【図４】従来の技術の電磁結合型ＩＤシステムのブロッ
ク図である。FIG. 4 is a block diagram of a conventional electromagnetically coupled ID system.
【図５】従来の技術の送信ヘッドの説明図であり、
（ａ）は送信ヘッドの側面の断面図、（ｂ）は送信ヘッ
ドの正面図である。FIG. 5 is an explanatory diagram of a conventional transmission head,
(A) is sectional drawing of the side surface of a transmission head, (b) is a front view of a transmission head.
３ 送信回路 ６ 送信コイル Ａ 送信ヘッド Ｂ データキャリア １７ ケーシング １７ｂ 背面磁界反射部材 １７ｃ 側面磁界反射部材 １７ｄ 側面磁界反射部材 １７ｅ 側面磁界反射部材 １７ｆ 側面磁界反射部材 １７ｇ 磁界反射鍔部 １７ｉ 磁界反射円筒部 3 transmitter circuit 6 transmitter coil A transmitter head B data carrier 17 casing 17b back magnetic field reflection member 17c side magnetic field reflection member 17d side magnetic field reflection member 17e side magnetic field reflection member 17f side magnetic field reflection member 17g magnetic field reflection flange 17i magnetic field reflection cylindrical portion
Claims (4)
るデータキャリアと電磁結合する送信コイルと、データ
キャリアに送信する信号に基づいて送信コイルに誘導電
磁界を発生させる送信回路と、送信コイルを内設するケ
ーシングとを有する電磁結合型ＩＤ装置の送信ヘッドに
おいて、前記送信コイルのデータ送信方向と反対側の外
側に誘導電磁界を反射する背面磁界反射部材を設けたこ
とを特徴とする電磁結合型ＩＤ装置の送信ヘッド。1. A transmission coil for generating an induction electromagnetic field to electromagnetically couple with a data carrier passing in the vicinity thereof, a transmission circuit for generating an induction electromagnetic field in the transmission coil based on a signal transmitted to the data carrier, and transmission. In a transmission head of an electromagnetic coupling type ID device having a casing in which a coil is provided, a back magnetic field reflecting member for reflecting an induction electromagnetic field is provided on the outside of the transmission coil on the side opposite to the data transmission direction. Transmission head for electromagnetically coupled ID device.
ルの径方向の外側に誘導電磁界を反射する側面磁界反射
部材を形成したことを特徴とする請求項１記載の電磁結
合型ＩＤ装置の送信ヘッド。2. The electromagnetic coupling type ID according to claim 1, wherein the back surface magnetic field reflecting member is extended to form a side surface magnetic field reflecting member that reflects an induction electromagnetic field on the outer side in the radial direction of the coil. The transmission head of the device.
送信方向側の端部を送信コイルの径中心方向に延設し
て、誘導電磁界を反射する磁界反射鍔部を形成したこと
を特徴とする請求項２記載の電磁結合型ＩＤ装置の送信
ヘッド。3. An end portion of the side reflection member on the data transmission direction side of the transmission coil is extended in a radial center direction of the transmission coil to form a magnetic field reflection collar portion for reflecting an induction electromagnetic field. The transmission head of the electromagnetically coupled ID device according to claim 2.
向側に、筒体であって誘導電磁界を反射する磁界反射円
筒部を連設したことを特徴とする請求項３記載の電磁結
合型ＩＤ装置の送信ヘッド。4. The electromagnetic coupling according to claim 3, wherein a magnetic field reflecting cylindrical portion, which is a tubular body and reflects an induction electromagnetic field, is provided in series on the transmission direction side of the transmitting coil of the magnetic field reflecting collar portion. Transmitting head of type ID device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8072232A JPH09259241A (en) | 1996-03-27 | 1996-03-27 | Transmission head for electromagnetically coupled id device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8072232A JPH09259241A (en) | 1996-03-27 | 1996-03-27 | Transmission head for electromagnetically coupled id device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09259241A true JPH09259241A (en) | 1997-10-03 |
Family
ID=13483331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8072232A Pending JPH09259241A (en) | 1996-03-27 | 1996-03-27 | Transmission head for electromagnetically coupled id device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09259241A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010078444A3 (en) * | 2009-01-01 | 2010-10-21 | Palm, Inc. | Shield for use with a computing device that receives an inductive signal transmission |
| US8850045B2 (en) | 2008-09-26 | 2014-09-30 | Qualcomm Incorporated | System and method for linking and sharing resources amongst devices |
| US8868939B2 (en) | 2008-09-26 | 2014-10-21 | Qualcomm Incorporated | Portable power supply device with outlet connector |
| US8954001B2 (en) | 2009-07-21 | 2015-02-10 | Qualcomm Incorporated | Power bridge circuit for bi-directional wireless power transmission |
| US9083686B2 (en) | 2008-11-12 | 2015-07-14 | Qualcomm Incorporated | Protocol for program during startup sequence |
| US9097544B2 (en) | 2009-08-27 | 2015-08-04 | Qualcomm Incorporated | Location tracking for mobile computing device |
| US9191781B2 (en) | 2010-08-31 | 2015-11-17 | Qualcomm Incorporated | Use of wireless access point ID for position determination |
| US9201457B1 (en) | 2001-05-18 | 2015-12-01 | Qualcomm Incorporated | Synchronizing and recharging a connector-less portable computer system |
| US9395827B2 (en) | 2009-07-21 | 2016-07-19 | Qualcomm Incorporated | System for detecting orientation of magnetically coupled devices |
-
1996
- 1996-03-27 JP JP8072232A patent/JPH09259241A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9201457B1 (en) | 2001-05-18 | 2015-12-01 | Qualcomm Incorporated | Synchronizing and recharging a connector-less portable computer system |
| US8850045B2 (en) | 2008-09-26 | 2014-09-30 | Qualcomm Incorporated | System and method for linking and sharing resources amongst devices |
| US8868939B2 (en) | 2008-09-26 | 2014-10-21 | Qualcomm Incorporated | Portable power supply device with outlet connector |
| US9083686B2 (en) | 2008-11-12 | 2015-07-14 | Qualcomm Incorporated | Protocol for program during startup sequence |
| WO2010078444A3 (en) * | 2009-01-01 | 2010-10-21 | Palm, Inc. | Shield for use with a computing device that receives an inductive signal transmission |
| US8954001B2 (en) | 2009-07-21 | 2015-02-10 | Qualcomm Incorporated | Power bridge circuit for bi-directional wireless power transmission |
| US9395827B2 (en) | 2009-07-21 | 2016-07-19 | Qualcomm Incorporated | System for detecting orientation of magnetically coupled devices |
| US9097544B2 (en) | 2009-08-27 | 2015-08-04 | Qualcomm Incorporated | Location tracking for mobile computing device |
| US9191781B2 (en) | 2010-08-31 | 2015-11-17 | Qualcomm Incorporated | Use of wireless access point ID for position determination |
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