JPH09259241A - Transmission head for electromagnetically coupled id device - Google Patents

Transmission head for electromagnetically coupled id device

Info

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
field
coil
transmission head
reflecting
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.)
Granted
Application number
JP8072232A
Other languages
Japanese (ja)
Inventor
Katsuhiro Hirata
Yoshitaka Ichii
Yoshio Mitsutake
義孝 一井
義雄 光武
勝弘 平田
Original Assignee
Matsushita Electric Works Ltd
松下電工株式会社
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 Matsushita Electric Works Ltd, 松下電工株式会社 filed Critical Matsushita Electric Works Ltd
Priority to JP8072232A priority Critical patent/JPH09259241A/en
Publication of JPH09259241A publication Critical patent/JPH09259241A/en
Application status is Granted legal-status Critical

Links

Abstract

PROBLEM TO BE SOLVED: To provide a transmission head capable of surely transferring digital data without failing the transmission of the digital data from the transmission head to a data carrier by the adverse effect of a magnetic body around the transmission head.
SOLUTION: This transmission head is provided with a transmission coil 6 for generating an induction field and electromagnetically coupling with the data carrier passing by, a transmission circuit for making the transmission coil 6 generate the induction field based on signals transmitted to the data carrier and a casing 17 (17a-17f) provided with the transmission coil 6 in the inside. In this case, further, a back surface magnetic field reflection member 17b for reflecting the induction field to the outer side on the opposite side of a data transmission direction of the transmission coil 6 is provided, an eddy current is generated at the back surface magnetic field reflection member 17b by the induction field generated by the transmission coil 6 and the distribution of the induction field to a rear part is shielded by the eddy current.
COPYRIGHT: (C)1997,JPO

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【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 The present invention is, gate opening and closing system in the parking lot, etc., personnel entry and exit management system in leisure facilities, recognition system of parts and products in the factory, used for distribution management system of the goods and the like, non it is one of the ID device contact scheme for electromagnetic coupling type ID device.

【0002】 2.]

【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。 Will be described with reference to FIGS. 4-5 the transmission head BACKGROUND ART prior art electromagnetic coupling type ID system. 図4は電磁結合型IDシステムのブロック図である。 Figure 4 is a block diagram of an electromagnetic coupling type ID system. 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。 Figure 5 is an explanatory view of the transmission head, FIG. 5 (a) is a side sectional view of the transmission head, FIG. 5 (b) 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。 [0003] In FIG 4, A transmission head, B denotes a data carrier. 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。 Transmission head A is connected to an external control device C, and doorways leisure facilities are intended to be deferred to a predetermined position of the production line. 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。 Data carrier, human or possession, it is to 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。 [0004] transmission head A is by electromagnetically coupling a data carrier B by inductive electromagnetic field itself emits supplies the electromagnetic energy as a power source to the data carrier B, the data carrier B accesses the data carrier B it is intended for transmitting and receiving digital data to and from.

【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] Data carrier B are linked to the induction field to release the transmission head A, together with obtaining the electromagnetic energy as a power source for itself operated from transmission head A, the induction electromagnetic field emission transmission head A based on the digital data superimposed on, or send its own stored data are those or rewrite its own stored 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、 [0006] transmission head A, the main control unit 1, the interface unit 2, a modulation unit 3 corresponding to the transmission circuit, a demodulation unit 4,
発振部5、送信コイル6、受信コイル7を備えている。 Oscillation section 5, the transmission coil 6, and a receiver coil 7.

【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 [0007] The main control unit 1 is to oversee the entire transmission head A, via the interface unit 2, based on various commands input from the external control unit C, an oscillation section 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。 It modulates the oscillating signal output 100KHz about sine wave by the modulation section 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。 [0008] Modulation section 3 outputs the modulated signal the modulation to the transmitter coil 6. 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。 Transmitting coil 6 is released into the space modulated signal said modulated as induction 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。 [0009] The main control unit 1 receives a demodulated signal demodulator 4 demodulates the receive coil 7 to pick up, and outputs the demodulated signal through the interface unit 2 to the external control device C.

【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、 [0010] Data carrier B, the main control unit 8, the data storage unit 9, a modulator 10, demodulator 11, rectifier circuit 12,
送受信コイル13、共振コンデンサ14、15とを備えている。 Receiving coil 13, and a resonance capacitor 14.

【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。 The rectifier circuit section 12, the data carrier B enters the induction field reaches the area of ​​release of the transmission coil 6 of the transmission head A, inductive transmission and reception coil 13 emits the transmitting coil 6 of the transmission head A to pick up generates a power supply voltage for operating the data carrier B from the electromagnetic field, the main control unit 8, the data storage unit 9, a modulation unit 10, for supplying power to the demodulator 11. 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 The data storage unit 9, as power supply from the rectifier circuit 12 is also interrupted, the stored contents are not eliminated EE
PROM等を用いる。 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 The demodulator 1 receives power from the rectifier circuit 12
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。 1 demodulates the induced electromagnetic field transmitting and receiving coil 13 emits the transmitting coil 6 to be picked up, 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 rectifier circuit section 12 the main control unit 8 which receives power from a portion which controls the entire data carrier B, and based on the demodulated signal output by the demodulation unit 11 reads necessary data from the data storage unit 9 and outputs to modulating section 10 Te, or rewriting some of the data stored in the data storage unit 9.

【0014】整流回路部12から給電を受ける変調部1 [0014] Modulation unit 1 receives power from the rectifier circuit 12
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。 0, where reading and transmitting and receiving coil 13 and the resonance capacitor 14, 15 an induction field is excited wave generated by resonating the induced electromagnetic field emission transmission coil 6, the main control unit 8 from the data storage unit 9 modulating based on the example data carrier B unique identification number data. 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。 The induction field is the modulated excitation wave is emitted from the transmitting and receiving coil 13 in the space.

【0015】よって、送信ヘッドAは、送受信コイル1 [0015] Thus, transmission head A includes a transmitting and receiving coil 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。 3 release, the modulated induction field on the basis of the data carrier B unique identification number data, as well as pick-up by the receiving coil 7, demodulated by the demodulator 4, the data carrier B unique identification number data via the interface unit 2 is output to the external control device C. 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 That is, from the data carrier B transmission head A, the data carrier B
固有の識別番号データを読み出すことができる。 It is possible to read the unique identification number data.

【0016】以上のようにして構成される送信ヘッドA [0016] above to send configured head 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。 Each portion of the FIG. 5 (a), the as shown in FIG. 5 (b), are housed in the casing 16. ケーシング16は、正面部16a、背面部16b、側面部16c,16d,1 Casing 16 is a front portion 16a, the rear portion 16b, the side surface portions 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。 6e, a box body formed of a nonmagnetic material such as resin consisting 16f. 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。 That is, the casing 16, the transmission coil 6, the receiving coil 7, a substrate portion P1, P2 are internally provided.

【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) [0017] Then, the front portion 16a of the casing 16 is in the transmit direction of the data transmission coils 6 (hereinafter, referred to as forward)
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 cover, rear portion 16b is opposite to the transmission direction of data transmission coils 6 direction (hereinafter, referred to as backward) covers, side portions 16c, 16d, 16e, 16f is the outer side in the radial direction of the transmitting 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、 [0018] Incidentally, on the substrate portion P1, P2, the main control unit 1, the interface unit 2, a modulation unit 3, a demodulation unit 4,
発振部5が設けられている。 Oscillation section 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。 [0007] However, the above-described FIG. 5 (a), the In the transmission head as shown in FIG. 5 (b), since the casing 16 is a non-magnetic material, the front of the transmission head A evenly induction field for two directions of the rear occurs with.

【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。 [0020] Then, if the rear of the communication head A has a magnetic material such as an iron plate, adversely affects the distribution of the magnetic body is an induction field, failure to transmit the digital data to the data carrier B from the transmission head A there is a problem in that if there is to be.

【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。 [0021] The present invention has been made to improve the above problems, it is an object of the digital data between the transmission head to the data carrier by the adverse effects of the magnetic body surrounding the transmission head without failing the transmission is to provide a transmission head which can transmit and receive reliably digital data.

【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。 The present invention SUMMARY OF] In order to solve the above problems, in the invention of claim 1, wherein, to generate an induction field, electromagnetically coupled and the data carrier to pass through the vicinity of a transmit coil, and a transmission circuit for generating an induction field in the transmitter coil based on the signal to be transmitted to the data carrier in the transmission head of the electromagnetic coupling type ID device having a casing which internally provided a transmission coil, the transmission coil in which characterized in that a rear magnetic field reflecting member for reflecting an induction field and data transmission direction on the outside of the opposite side.

【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。 [0023] In the second aspect of the invention is to extend the rear magnetic field reflecting member, characterized in that the formation of the side magnetic field reflecting member for reflecting an induction field on the outside in the radial direction of the coil it is intended.

【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。 [0024] In the third aspect of the present invention, to extend the end of the data transmission direction of the transmission coil of the side reflecting member in the diameter center direction of the transmission coil, the magnetic field reflections reflecting an induction field it is characterized in that the formation of the flange portion.

【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。 [0025] wherein In the invention of claim 4, wherein, in transmitting direction of the transmitting coil of the magnetic field reflecting flange portion, it has continuously provided a magnetic field reflecting cylinder for reflecting an induction field to a cylindrical body it is an.

【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。 The first embodiment of the embodiment of the invention transmitting head according to the present invention with reference to FIG. 1, the second embodiment with reference to FIG. 2, described with reference to the third embodiment in FIG. 3 to.

【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、 [0027] [First Embodiment] FIG. 1 is an explanatory view of the transmission head, FIG. 1 (a) is a side cross-sectional view of transmission head,
図1(b)は送信ヘッドの正面図である。 1 (b) is a front view of the transmission head. 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。 Incidentally, since the same portions as transmission head was described in the above mentioned prior art in FIG. 1 are denoted by the same reference numerals, detailed explanation about the equivalent point is omitted.

【0028】図1に示す本実施の形態の送信ヘッドが、 The transmission head of the present embodiment shown in FIG. 1,
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。 Become characterized Unlike transmission head was described in the above mentioned prior art is the following configuration.

【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 [0029] That is, the back portion 17b which corresponds to the rear magnetic field reflecting member side portion 17c that corresponds to the side field reflector, 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。 7d, 17e, 17f, and aluminum, copper, a structure formed with a high conductivity material such as superconductor. 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。 Then, the front portion 17a of the casing 17 is formed in a manner similar to that of was described in the prior art in a non-magnetic material such as resin.

【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 [0030] Thus, the induction field of the transmitting coil 6 is caused, the rear portion 17b of the casing 17, the side surface portion 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。 7c, 17d, 17e, an eddy current is generated in 17f, induction electromagnetic field distribution to the rear and side is shielded by the eddy current, to generate an induced electromagnetic field only in front of the transmitting coil 6. 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。 Then, even if the magnetic material is present in the rear and side, induction electromagnetic field distribution is not affected by the magnetic body. 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。 Furthermore, forward, induction results in the electromagnetic field distribution is biased to improve directivity of the distribution of the induction field, thereby improving the transmission distance.

【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、 [0031] [Second Embodiment] FIG. 2 is an explanatory view of the transmission head, FIG. 2 (a) is a side cross-sectional view of transmission head,
図2(b)は送信ヘッドの正面図である。 Figure 2 (b) is a front view of the transmission head. 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。 Since in FIG. 2 is an equivalent location and transmission head was described in the first embodiment described above are denoted by the same reference numerals, detailed explanation about the equivalent point is omitted.

【0032】図2に示す本実施の形態の送信ヘッドが、 The transmission head of the present embodiment shown in FIG. 2,
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。 Become characterized Unlike transmission head was described in the first embodiment described above is a following configuration.

【0033】即ち、ケーシング17の正面部17aを、 [0033] In other words, the front portion 17a of the casing 17,
正面部17aの径方向の外方であって、側面部17c, A is towards the outside in the radial direction of the front portion 17a, side surface portions 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 17d, 17e, and the flange portion 17g which corresponds to the magnetic field reflecting flange portion formed by being continuously provided high conductivity material from 17f, the front portion 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 Central portion 1 formed by a by inwardly nonmagnetic in the radial direction of the a
7hとで構成である。 It is composed of a 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 [0034] Thus, the induction field of the transmitting coil 6 is caused, the rear portion 17b of the casing 17, the side surface portion 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。 7c, 17d, 17e, 17f, an eddy current is generated in the flange portion 17g, the induction electromagnetic field distribution to the rear and side is shielded by the eddy current. 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。 Then, even if the magnetic material is present in the rear and side, induction electromagnetic field distribution is not affected by the magnetic body.

【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, forward, induction electromagnetic field distribution biased so is emitted to the outside only through the central portion 17h is non-magnetic material, and further improve the directivity of the distribution of the induction field, transmittable distance There 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、 [0036] [Third Embodiment] FIG. 3 is an explanatory view of the transmission head, FIG. 3 (a) is a side cross-sectional view of transmission head,
図3(b)は送信ヘッドの正面図である。 3 (b) is a front view of the transmission head. 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。 Incidentally, since the same portions as transmission head was described in the second embodiment described above in FIG. 3 are denoted by the same reference numerals, detailed explanation about the equivalent point is omitted.

【0037】図3に示す本実施の形態の送信ヘッドが、 The transmission head of the present embodiment shown in FIG. 3,
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。 Become characterized Unlike transmission head was described in the second embodiment described above is a following configuration.

【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 [0038] That is, the cylindrical portion 17 corresponding to from the boundary line between 17h is a non-magnetic material and a flange portion 17g is high conductivity material, to the magnetic field reflecting the cylindrical portion and extending the flange portion 17g end forward
iを形成し、非磁性体の中央部17hは該円筒部17i i is formed, the central portion 17h of the non-magnetic body cylindrical portion 17i
の先端部に設けた構成である。 Is a structure in which the tip portion.

【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 [0039] Thus, the induction field of the transmitting coil 6 is caused, the rear portion 17b of the casing 17, the side surface portion 1
7c,17d,17e,17f、鍔部17g、円筒部1 7c, 17d, 17e, 17f, the flange portion 17g, a cylindrical portion 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。 Eddy current is generated in 7i, induction electromagnetic field distribution to the rear and side is shielded by the eddy current. 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。 Then, even if the magnetic material is present in the rear and side, induction electromagnetic field distribution is not affected by the magnetic body.

【0040】更に、前方に、誘導電磁界は中央部17h [0040] In addition, forward, induction electromagnetic field is the central part 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、 Released only to the outside through the, and since the spread of the induction field is restricted by the cylindrical portion 17i, bias induced electromagnetic field distribution, and further improve the directivity of the distribution of the induction field,
伝送可能距離が向上する。 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 transmission head of the present invention exhibits are constructed as described above, in the invention described in claim 1, the back magnetic field reflecting member reflects the induction field, the transmission coil caused the induction field, generated eddy current on the back field reflecting member, because the induction electromagnetic field distribution to the rear is shielded by the eddy current, even magnetic rearward are present, the distribution of the induction field without being affected by the magnetic body, also, in front of the transmitter coil, the induction electromagnetic field distribution is uneven, to improve the directivity of the distribution of the induction field, electromagnetic coupling type, which can improve transmission distance an effect that can provide transmission head of ID device.

【0042】請求項2記載の発明にあっては、請求項1 [0042] In the invention of claim 2, claim 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、 In addition to the effect of the invention described, the side field reflecting member reflects the induction field, the induction field by the transmitting coil caused, occurs an eddy current on the side surface magnetic field reflecting member backward by eddy current since the induction electromagnetic field distribution is shielded,
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。 Even if the magnetic material is present on the side of the transmitter coil, the induction electromagnetic field distribution is not affected by the magnetic body, also in front of the transmitter coil, the induction electromagnetic field distribution is uneven, induction electromagnetic field further improve the directivity of the distribution, there is an effect that it provides a transmission head of the electromagnetic coupling type ID device capable of improving the transmission distance.

【0043】請求項3記載の発明にあっては、請求項2 [0043] In the third aspect of the present invention, claim 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、 In addition to the effect of the invention described, the magnetic field reflected flange portion reflects the induction field, forward, induction electromagnetic field distribution biased so is emitted to the outside only through the central portion of the flange portion is formed,
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。 A directional distribution of the induced electromagnetic field further improved, an effect that it provides a transmission head of the electromagnetic coupling type ID device capable of improving the transmission distance.

【0044】請求項4記載の発明にあっては、請求項3 [0044] In the invention described in claim 4, claim 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。 In addition to the effect of the invention described, the magnetic field reflecting cylindrical portion reflects the induction field, induction electromagnetic field is emitted to the outside only through the central portion formed by the flange portion and spread of the induction field is a magnetic field because it is regulated by the reflection cylindrical portion, biased distribution of the induced electromagnetic field, the directional distribution of the induced electromagnetic field further improved, it can provide a transmission head of the electromagnetic coupling type ID device capable of improving the transmittable distance there is an effect that.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【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。 Figure 1 is an explanatory view of the transmission head to the first embodiment of the present invention, (a) is a side sectional view of the transmission head, (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。 FIG. 2 is an explanatory view of the transmission head to the second embodiment of the present invention, (a) is a side sectional view of the transmission head, (b) 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。 [Figure 3] is an explanatory view of the transmission head of a third embodiment of the present invention, (a) is a side sectional view of the transmission head, (b) 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。 4 is a block diagram of an electromagnetic coupling type ID systems of the prior art.

【図5】従来の技術の送信ヘッドの説明図であり、 [Figure 5] is an explanatory view of the transmission head prior art,
(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。 (A) is a side sectional view of the transmission head, (b) is a front view of the transmission head.

【符号の説明】 DESCRIPTION OF SYMBOLS

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 transmitting circuit 6 transmits coil A transmission head B data carrier 17 casing 17b back field reflecting member 17c side field reflecting member 17d side field reflecting member 17e side field reflecting member 17f side field reflecting member 17g field reflector flange portion 17i field reflecting cylindrical portion

Claims (4)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 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電磁結合型ID装置の送信ヘッド。 1. A by generating an induction field, a transmit coil for the data carrier and electromagnetic coupling across a vicinity of a transmission circuit for generating an induction field in the transmitter coil based upon the signals to be transmitted to the data carrier, transmitted in transmission head of the electromagnetic coupling type ID device having a casing which internally provided with coils, characterized in that a rear magnetic field reflecting member for reflecting an induction field on the outside of the data transmission direction opposite of the transmission coil transmission head of electromagnetic coupling type ID device.
  2. 【請求項2】 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請求項1記載の電磁結合型ID装置の送信ヘッド。 2. A by extending the rear magnetic field reflecting member, electromagnetic coupling type ID of claim 1, wherein the forming the side field reflecting member for reflecting an induction field on the outside in the radial direction of the coil transmission head of the device.
  3. 【請求項3】 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請求項2記載の電磁結合型ID装置の送信ヘッド。 3. to extend the end of the data transmission direction of the transmission coil of the side reflecting member in the diameter center direction of the transmitter coil, and characterized in that a magnetic field reflecting flange portion for reflecting an induction field transmission head of the electromagnetic coupling type ID system of claim 2 wherein.
  4. 【請求項4】 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請求項3記載の電磁結合型ID装置の送信ヘッド。 4. A transmission direction of the transmission coil of the magnetic field reflecting flange portion, the electromagnetic coupling according to claim 3, characterized in that consecutively provided a magnetic field reflecting cylinder for reflecting an induction field to a cylindrical body transmission head of the type ID device.
JP8072232A 1996-03-27 1996-03-27 Transmission head for electromagnetically coupled id device Granted JPH09259241A (en)

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 Granted 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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010078444A2 (en) * 2009-01-01 2010-07-08 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

Cited By (10)

* Cited by examiner, † Cited by third party
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
US8868939B2 (en) 2008-09-26 2014-10-21 Qualcomm Incorporated Portable power supply device with outlet connector
US8850045B2 (en) 2008-09-26 2014-09-30 Qualcomm Incorporated System and method for linking and sharing resources amongst devices
US9083686B2 (en) 2008-11-12 2015-07-14 Qualcomm Incorporated Protocol for program during startup sequence
WO2010078444A2 (en) * 2009-01-01 2010-07-08 Palm, Inc. Shield for use with a computing device that receives an inductive signal transmission
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

Similar Documents

Publication Publication Date Title
US4510495A (en) Remote passive identification system
EP0722094B1 (en) Transmitter-receiver for non-contact IC card system
US6650227B1 (en) Reader for a radio frequency identification system having automatic tuning capability
US6765476B2 (en) Multi-level RF identification system
AU741588B2 (en) Reader for RFID system
US6176433B1 (en) Reader/writer having coil arrangements to restrain electromagnetic field intensity at a distance
CA1221154A (en) Automatic information transmission system for mobile object
JP4911148B2 (en) Non-contact power feeding device
US5420579A (en) Antenna and driving circuit for transmitting and receiving signals to and from a passive transponder
US5258766A (en) Antenna structure for providing a uniform field
US5461386A (en) Inductor/antenna for a recognition system
EP1142169B1 (en) Radio frequency receiver circuit
US6853687B2 (en) Proximity-based magnetic field generator for controlling operation of RF burst-transmitting tags of geolocation system
EP0534559B1 (en) Chip card allowing remote identification
CN100545853C (en) System for the data exchange between at least two contactless data carriers
US4912684A (en) Seismic streamer communication system
US20070171073A1 (en) Repeaters for RFID systems
US6135060A (en) Animal training device
US5504485A (en) System for preventing reading of undesired RF signals
US4932057A (en) Parallel transmission to mask data radiation
AU634789B2 (en) Electromagnetic energy transmission and detection system
CN1145128C (en) Low-power radio frequency identification reader
KR100215234B1 (en) Device with a signal-receivng unit for locating golf balls
US4196347A (en) Security systems
EP0324564B1 (en) System for communicating identification information and the like

Legal Events

Date Code Title Description
A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20010522