JP3679338B2 - RFID tag housing structure and installation structure - Google Patents

Description

【００５３】
アンテナコイル２ａの一例としては、例えば、直径３０μｍ程度の銅線が単線巻きで径方向に多重層で軸方向にシリンダ状に巻かれており、そのアンテナコイル２ａの内部にコア部材３が有る状態でのインダクタンスは９．５mH（周波数１２５kHz）程度で、アンテナコイル２ａに共振用に別途接続されたコンデンサの静電容量は１７０pF（周波数１２５kHz）程度であった。
【００５４】
一方、図１において、16は製品管理される物品の一例として、酸素ガスやアセチレンガス等を収容した金属製の導電性部材からなるガスボンベであり、該ガスボンベ16には、内部に本発明に係る収容構造によりＲＦＩＤタグ１ａ，１ｂを収容した導電性材料で作られた容器Ａが取り付けられている。
【００５５】
ＲＦＩＤタグ１ａ，１ｂには各ガスボンベ16に付与された固有のＩＤコード番号が記憶されており、リードライト端末機９を利用してＲＦＩＤタグ１ａ，１ｂに記憶されたＩＤコード番号を読み出してガスボンベ16の製品管理が出来るようになっている。
【００５６】
図２に示す導電性材料で作られた容器Ａは２分割された断面方形状の容器本体５と、該容器本体５の開口部７を覆う蓋体11からなり、ＲＦＩＤタグ１ａを容器本体５の開口部７の内部に収容し、更に非導電性材料である樹脂８等を充填し、該容器本体５と蓋体11とを互いに接合して固定手段となるビス10により固定することでＲＦＩＤタグ１ａを覆って保護する。
【００５７】
尚、導電性材料で作られた容器Ａは他の複数の分割体により多分割されたものを接合してＲＦＩＤタグ１ａを内部に収容するように構成したものであっても良い。
【００５８】
ＲＦＩＤタグ１ａは容器本体５の開口部７に挿入され、その軸方向（図３の左右方向）を該開口部７の設置面となる底面７ａと平行にして該底面７ａに略接するようにしてスペーサ等を介さずに直に設置される。
【００５９】
開口部７内に埋設されたＲＦＩＤタグ１ａのガラス容器６の外周には非導電性材料である樹脂８や接着剤等を充填して固定する。尚、開口部７内に埋設されたＲＦＩＤタグ１ａの外周に非導電性材料で作られたスポンジやガラスウール等の緩衝材や断熱材を該ＲＦＩＤタグ１ａに接して設けても良い。
【００６０】
開口部７内に収納されたＲＦＩＤタグ１ａの表面側には金属製等の導電性材料で作られた断面方形状の蓋体11が配置されてＲＦＩＤタグ１ａの表面側が覆われ、該蓋体11が固定手段となるビス10により容器本体５に固定されている。
【００６１】
ＲＦＩＤタグ１ａを容器本体５と蓋体11からなる容器Ａに収容して周囲を覆った状態とし、該容器本体５と蓋体11との分割面となる接合面からなる磁束漏洩路12を形成し、該磁束漏洩路12を通る漏洩磁束を利用して通信を行うように構成したものである。
【００６２】
ＲＦＩＤタグ１ａは、その本体が棒状に構成され、開口部７は該ＲＦＩＤタグ１ａの大きさに応じた断面方形状で構成されている。蓋体11は中央部に開口部７の形状に応じた形状を有する方形状の嵌合部11ａが開口部７側に突出しており、該嵌合部11ａを開口部７に嵌合することで位置決めがされ、蓋体11の鍔部11ｂに形成された貫通穴11ｃを介して容器本体５に設けられたタップ穴５ａに固定手段となるビス10を螺合締着することで蓋体11が容器本体５に固定される。
【００６３】
尚、固定手段としては、容器本体５にタップ穴５ａを設けずにビス10としてタッピングビスを用いて固定しても良い。
【００６４】
また、ＲＦＩＤタグ１ａはガラス容器６の代わりに樹脂等で封止したものを更に非導電性材料からなる樹脂８や接着剤等を充填して固定しても良い。
【００６５】
図６はフリーの状態のＲＦＩＤタグ１ａから発生する磁界Ｈの様子を示す。
【００６６】
ＲＦＩＤタグ１ａのアンテナコイル２ａの軸方向の端部と、ガラス容器６の軸方向の端部とは上記表１に示したＬ_１，Ｌ_２の寸法差に応じた位置関係にあり、図１及び図２に示す開口部７の側面７ｂと、アンテナコイル２ａの軸方向の端部との間に所定の離間間隔が形成され、これによりアンテナコイル２ａを貫く磁束が形成され易く、磁界Ｈの形成に寄与する。
【００６７】
また、図３（ａ）に示すように、ビス10により固定される容器本体５と、蓋体11との間には互いに当接する分割面となる接触面が形成され、この接触面により磁束を漏洩させる磁束漏洩路12が形成される。
【００６８】
上記の磁束漏洩路12を形成するための間隙は、所望の漏洩磁束の大きさにより変化させ、例えば、ビス10の締付力または接触面の粗面の程度等によって調整される。粗面化により磁束漏洩路12を形成させる場合には、対向する両表面は互いに分散接触し、磁束漏洩路12は分散する非接触部分を利用して形成される。
【００６９】
接触面の表面粗度は、互いに対向する表面の一方の表面粗度が０．０４μｍ程度に加工され、これにより接触面の隙間として０．０８μｍ程度が形成され、所望の電磁波の漏洩度が確保される。
【００７０】
また、図３（ｂ）では、容器本体５と、蓋体11との間にゴムや樹脂等の非導電性材料で作られたスペーサ13を介在させて固定手段となるビス10により固定したもので、比較的大きな厚さの磁束漏洩路12が確保出来る。
【００７１】
蓋体11と容器本体５との間に非導電性材料からなるスペーサ13を介在させた場合には、密封性を確保しつつ、且つ容器本体５と蓋体11との間に形成される非導電性材料により漏れ磁束が多くなるため好ましい。
【００７２】
また、図３（ｃ）では、容器本体５と、蓋体11とを、固定手段となる非導電性材料からなる接着剤14により固定したもので、接着による略平滑な分割面となる接触面が形成され、この接触面により磁束を漏洩させる磁束漏洩路12が形成される。
【００７３】
また、蓋体11を容器本体５に対して接着剤14により固定した場合には、簡単な構成で固定出来、蓋体11と容器本体５との間に介在する接着剤14の層により密封性を確保しつつ、且つ容器本体５と蓋体11との間に非導電性材料からなる物理的な磁束漏洩路12が形成されるため漏れ磁束が多くなる。
【００７４】
尚、蓋体11と容器本体５との間にスペーサ13を介在させて接着剤14により蓋体11とスペーサ13と容器本体５とを接着しても良い。
【００７５】
本発明者等が行った実験結果によれば、磁界Ｈは狭い隙間であっても回析現象により狭い隙間から伝搬することが判明したものであり、上述のような物理的な僅かな隙間である磁束漏洩路12を実用的なレベルで送受信可能な量の磁束が漏洩し得るように形成し、それを検証することでＲＦＩＤタグ１ａと外部のリード端末機等との間で電力送電媒体及び情報通信媒体である交流磁界を相互に送受信することが出来ることを見い出したものである。
【００７６】
尚、磁束漏洩路12の経路長と該磁束漏洩路12の間隙幅（平均間隙幅）は外部のリードライト端末機９との間に電磁波の送信が可能な最低値以上有れば良く、０．０８μｍ程度の間隙幅（平均間隙幅）があれば十分である。
【００７７】
ＲＦＩＤタグ１ａを収容して全外周表面を覆う容器Ａを構成する複数の分割体となる容器本体５及び蓋体11が導電性材料で作られ、該容器本体５と蓋体11との間に磁束漏洩路12が形成されたことで、外部からの応力や衝撃に対して一層強いものとなり、且つ磁束漏洩路12を介して電磁波が漏洩し、ＲＦＩＤタグ１ａと外部のリードライト端末機９等との間で電力送電媒体及び情報通信媒体である交流磁界を相互に送受信することが出来る。
【００７８】
従って、ＲＦＩＤタグ１ａを容器本体５に設けた表面側が開放された開口部７の底面７ａに略密着して直付けで設置し、更に開口部７の表面側を金属製等の導電性材料で作られた蓋体11により覆っても図３（ａ）〜（ｃ）に示すように、容器本体５の表面側に漏れ磁束による磁界Ｈが発生しており、磁束漏洩路12を通る漏洩磁束を利用して容器本体５と蓋体11とにより構成される容器Ａに収容された状態のＲＦＩＤタグ１ａと外部のリードライト端末機９等との間で通信が出来る。
【００７９】
図２に示す開口部７は方形状の蓋体11に対応して断面方形状で形成した一例であるが、図７に示すように円盤状の容器本体５と蓋体11とを用意し、該容器本体５に断面円形状の開口部７を形成してＲＦＩＤタグ１ａを収容設置することでも良い。
【００８０】
これ等は予め開口部７を想定して容器本体５の形状を製作するか、図２の開口部７はドリル等で複数の穴を連続的に並設して断面方形状の開口部７を形成することも可能である。また、図７に示す断面円形状の開口部７ではドリル等により容易に形成することが出来る。
【００８１】
また、アンテナコイル２ａにより形成される磁束の方向が、蓋体11と、容器本体５との分割面である接合面と一致した方向（図３の左右方向）に配置されており、これにより漏れ磁束の回折現象による伝搬が効果的に出来、容器Ａの外部に形成される磁界Ｈの形成に寄与する。
【００８２】
上記構成によれば、ＲＦＩＤタグ１ａから出た磁束の一部が容器本体５の設置面である底面７ａ上に分布し、それが磁気漏洩路12から外部に漏洩し、その漏洩磁束を利用して蓋体11の外部のリードライト端末機９と通信することが出来る。
【００８３】
また、リードライト端末機９等の発信装置から出た磁束は磁束漏洩路12から蓋体11で覆われた開口部７内に入り、その一部がＲＦＩＤタグ１ａのアンテナコイル２ａで検出される。
【００８４】
従って、ＲＦＩＤタグ１ａを容器本体５の開口部７内に収容して設置し、機械的強度の大きい金属等の導電性材料で作られた蓋体11で保護した状態で外部と通信することが出来る。
【００８５】
また、容器本体５に開口部７を形成し、その開口部７の底面７ａを設置面としてＲＦＩＤタグ１ａを配置したことで、ＲＦＩＤタグ１ａから出た磁束の一部、若しくはＲＦＩＤタグ１ａへ向かう磁束の一部は開口部７の空間に分布し、それを利用して磁束漏洩路12を通して通信することが出来る。
【００８６】
また、容器本体５と蓋体11からなる容器ＡにＲＦＩＤタグ１ａを収容することで該ＲＦＩＤタグ１ａの保全を確保することが出来、容器Ａを設けた製品に外力が作用して衝撃を受けてもＲＦＩＤタグ１ａが破損する等の虞が無い。
【００８７】
また、容器本体５に対して蓋体11をビス10や接着剤14で固定する以外にも、スライド式等で開閉可能なシャッター構造やヒンジ部材等を介して回動して開閉可能な構造としても良い。
【００８８】
図８は、蓋体11が開口部７側に突出した前記実施形態の嵌合部11ａを除去した平板からなるものであり、該蓋体11が容器本体５に対して直に当接され、固定手段となるビス10により固定された一例を示す。
【００８９】
尚、前記実施形態と同様に蓋体11と容器本体５との間に非導電性材料からなるスペーサ13を介在させたり、接着剤14により蓋体11を容器本体５に接着することでも良い。
【００９０】
図９及び図10では金属製等の導電性材料で作られた蓋体11の中央部に容器本体５の開口部７に対応して該開口部７と反対側に上方に突出した方形状の箱部11ｄが設けられており、該箱部11ｄの内部には開口部７に対向した収納部15が形成されている。本実施形態では、この収納部15にＲＦＩＤタグ１ａの一部が収納される。
【００９１】
そして、容器本体５の開口部７と蓋体11の収納部15の内部にＲＦＩＤタグ１ａを収納し、容器本体５の開口部７側に蓋体11の収納部15を対向させた状態で該蓋体11を容器本体５に固定手段となるボルト及びナット17により固定してＲＦＩＤタグ１ａが収容して覆われる。尚、５ｂはボルトを挿通する貫通穴である。
【００９２】
即ち、本実施形態の蓋体11は、図９及び図10に示すように、ハット形状で構成されており、ハット形状の蓋体11が容器本体５に対して直に当接され、ボルト及びナット17により締着して固定される。尚、前述と同様に、蓋体11と容器本体５との間に非導電性材料からなるスペーサ13を介在させたり、接着剤14により蓋体11を容器本体５に接着しても良い。
【００９３】
また、容器本体５の開口部７や蓋体11の収納部15に緩衝材や断熱材を介在させてＲＦＩＤタグ１ａを保護することで、より効果的にＲＦＩＤタグ１ａの保全を確保すると共に温度の安定化を図ることでＲＦＩＤタグ１ａの性能の安定化を図ることが出来る。
【００９４】
尚、図９及び図10では、容器本体５の開口部７及び蓋体11の収納部15を断面方形状で形成したが、図７に示したように、円盤状の容器本体５と蓋体11を用意し、該容器本体５の開口部７及び蓋体11の収納部15を断面円形状で形成することでも良い。
【００９５】
図11では、開口部７を有する容器本体５と蓋体11との分割面である接合面からなる磁束漏洩路12に対してシリンダ状のアンテナコイル２ａの軸方向が直交するように配置して収容したものである。
【００９６】
尚、図11では容器本体５と蓋体11との間にスペーサ13を介在させた一例であるが、前述と同様にスペーサ13を省略して容器本体５と蓋体11とを直接当接してボルト及びナット17により締着固定しても良いし、接着剤14により固定しても良い。
【００９７】
図12は平板状の蓋体11を貫通してシリンダ状に形成されたアンテナコイル２ａを有するＲＦＩＤタグ１ａの軸方向と一致する方向で該アンテナコイル２ａの長さＬ_２に応じた長さを有する磁束漏洩路となるスリット11ｅを設けたものである。尚、スリット11ｅは非導電性材料からなる接着剤や充填材で閉鎖することも出来る。
【００９８】
蓋体11に形成した磁束漏洩路となるスリット11ｅを介して漏れ磁束が回折して発生し、開口部７の設置面となる底面７ａの上部に磁界Ｈが形成される。これによりＲＦＩＤタグ１ａと外部のリードライト端末機９等との間で電力送電媒体及び情報通信媒体である交流磁界を相互に送受信する効果をより向上することが出来る。
【００９９】
尚、蓋体11以外にも容器本体５等の分割体自身にもスリット等の磁束漏洩路を形成しても良い。
【０１００】
図13及び図14において、21は導電性材料で作られた複数の分割体により構成される容器となるノート型パソコンであり、外装が導電性部材となる金属ケースにより覆われている。
【０１０１】
ノート型パソコン21はキーボード21a1が設けられた導電性材料で作られた本体側21ａと、液晶ディスプレイ21b1が設けられた導電性材料で作られた蓋側21ｂとが分割体容器として構成され、開閉手段であって回動軸となるヒンジ部材21ｃを介して回動して互いに開閉可能に連結されている。
【０１０２】
ノート型パソコン21は、図14（ｂ）に示すように、本体側21ａと蓋側21ｂとが互いの面21a2，21b2を対向して閉じられ、且つ蓋側21ｂが本体側21ａに対して開放出来る物品の一例であるが、他に同様な構造の携帯情報端末機(モバイルパソコン)や携帯電話機等各種の物品の製品管理にも適用可能である。
【０１０３】
ノート型パソコン21の蓋側21ｂの面21b2と、本体側21ａの面21a2との間には、ＲＦＩＤタグ１ａが配置されている。ＲＦＩＤタグ１ａのメモリ４ｂに、例えば、ＲＦＩＤタグ１ａが設けられるノート型パソコン21の履歴データやロット管理データ等が記憶されている。
【０１０４】
尚、ＲＦＩＤタグ１ａにノート型パソコン21の固有のコード情報が記憶されており、その固有のコード情報をリードライト端末機９等により読み出して別のデータベースから履歴データやロット管理データ等を閲覧することも可能である。
【０１０５】
本実施形態では、蓋側21ｂの面21b2にＲＦＩＤタグ１ａが非導電性材料からなる接着材や粘着材等により固定され、本体側21ａの面21a2のＲＦＩＤタグ１ａに応じた部位に該ＲＦＩＤタグ１ａの大きさに応じた凹部21a3が形成されている。
【０１０６】
そして、図14（ａ）に示すように本体側21ａの面21a2と、蓋側21ｂの面21b2との間に形成される微小な隙間である磁束漏洩路12から発生する漏れ磁束により形成される磁界Ｈを利用してＲＦＩＤタグ１ａに記憶された情報をリードライト端末機９等により取り出すことが出来る。
【０１０７】
本体側21ａの面21a2と、蓋側21ｂの面21b2とにより形成される微小な隙間である磁束漏洩路12がＲＦＩＤタグ１ａのアンテナコイル２ａの軸方向に開放した状態で形成されるため、これによりアンテナコイル２ａを貫く磁束が形成され易く、磁界Ｈの形成に寄与する。
【０１０８】
磁界Ｈは本体側21ａの面21a2と、蓋側21ｂの面21b2とにより形成される微小な隙間である磁束漏洩路12から伝搬することが出来、その磁束漏洩路12から発生する漏れ磁束により、ＲＦＩＤタグ１ａと外部のリードライト端末機９等との間で電力送電媒体及び情報通信媒体である交流磁界を相互に送受信してＲＦＩＤタグ１ａに記憶された情報を取り出すことが出来るものである。
【０１０９】
従って、外装が金属ケースからなるノート型パソコンや携帯情報端末機（モバイルパソコン）、携帯電話機等、一方を開放して見開きに出来るこれ等と同様の形態を有する各種の物品において、一方と他方との間にＲＦＩＤタグ１ａを配置し、該ＲＦＩＤタグ１ａに記憶された情報を取り出すことで製品管理を行うことが出来る。
【０１１０】
従って、梱包された製品を再検査する場合でも梱包材の外側からＲＦＩＤタグａに記憶された情報を取り出すことが出来、一旦梱包された製品の梱包材を解く必要がないため、作業性が良い。
【０１１１】
次に、参考例として図15〜図23を用いて同心円盤状のアンテナコイル２ｂを有するＲＦＩＤタグ１ｂの収容構造及び設置構造について説明する。尚、前記シリンダ状のアンテナコイル２ａを有するＲＦＩＤタグ１ａと同様の構成については同一の符号を付して説明を省略する。
【０１１２】
図15は導電性材料で作られた容器本体の開口部に収容配置された同心円盤状のアンテナコイルを有するＲＦＩＤタグを一部が該開口部内に挿入される凸部を有する蓋体により覆う様子を示す分解説明図、図16は図15の蓋体を固定手段により容器本体に固定した様子を示す断面説明図である。
【０１１３】
また、図17は同心円盤状のアンテナコイルを有するＲＦＩＤタグの構成を示す正面及び側面説明図、図18は同心円盤状のアンテナコイルを有するＲＦＩＤタグに発生する磁界の様子を示す模式図である。
【０１１４】
また、図19は容器本体の開口部に収容配置されたＲＦＩＤタグを平坦な板状の蓋体により覆う様子を示す断面説明図、図20は導電性材料で作られた断面円形状の容器本体の開口部に収容配置されたＲＦＩＤタグを、該ＲＦＩＤタグの一部を収納する収納部を形成した板状の蓋体により覆う様子を示す分解説明図である。
【０１１５】
また、図21は導電性材料で作られた容器本体の開口部に収容配置されたＲＦＩＤタグを、該ＲＦＩＤタグの一部を収納する収納部を形成した蓋体により覆う様子を示す断面説明図である。
【０１１６】
また、図22は導電性材料で作られた容器本体の開口部に同心円盤状のアンテナコイルを有するＲＦＩＤタグのコイル面方向が、その開口面と直交する方向で配置収容された様子を示す断面説明図、図23は板状の蓋体に各種のスリットを形成した場合の一例を示す分解説明図である。
【０１１７】
図15〜図23に示すＲＦＩＤタグ１ｂも同心円盤状のアンテナコイル２ｂと、制御部となる半導体ＩＣチップ４とがプリント回路基板等を介さずに直結して一体的に形成されており、これによりＲＦＩＤタグ１ｂの小型化を実現している。尚、ＲＦＩＤタグ１ｂの制御系の構成は図５に示して前述したと同様である。
【０１１８】
図17に示すＲＦＩＤタグ１ｂの内部には、単線巻きで径方向に多重層をなして同心円盤状に巻かれて形成されたアンテナコイル２ｂ、半導体ＩＣチップ４等が一体的に樹脂31により封止されて全体が円盤状に構成されている。
【０１１９】
ＲＦＩＤタグ１ｂはアンテナコイル２ｂの径方向の外径Ｄ_４に応じた外径Ｄ_３を有する樹脂31により封止されている。
【０１２０】
以下に本参考例で採用したＲＦＩＤタグ１ｂの樹脂31の外径Ｄ_３、及びアンテナコイル２ｂの外径Ｄ_４及びアンテナコイル２ｂの内径Ｄ_５の一例を示す。
【０１２１】
【表２】

【０１２２】
また、ＲＦＩＤタグ１ｂの樹脂31の厚さＴは０．７mm〜１２．０mm程度であり、ＲＦＩＤタグ１ｂの重量は、０．７g〜５．２g程度である。
【０１２３】
アンテナコイル２ｂの一例としては、直径３０μｍ程度の銅線が単線巻きで径方向に多重層をなして同心円盤状に巻かれており、そのアンテナコイル２ｂのインダクタンスは９．５mH（周波数１２５kHz）程度で、アンテナコイル２ｂに共振用に別途接続されたコンデンサの静電容量は１７０pF（周波数１２５kHz）程度であった。
【０１２４】
図18はフリーの状態のＲＦＩＤタグ１ｂから発生する磁界Ｈの様子を示す。
【０１２５】
一方、容器本体５にはＲＦＩＤタグ１ｂの大きさに応じた断面円形状の開口部７が形成されており、ＲＦＩＤタグ１ｂが、そのアンテナコイル面を容器本体５の設置面となる底面７ａに平行にして配置し、該容器本体５と、金属製等の導電性材料で作られた蓋体11との間に磁束漏洩路12が形成される。
【０１２６】
図15及び図16に示す蓋体11は中央部に開口部７の形状に応じた形状を有する円柱形状の嵌合部11ａが開口部７側に突出しており、該嵌合部11ａを開口部７に嵌合することで位置決めがされ、蓋体11の鍔部11ｂに形成された貫通穴11ｃを介して容器本体５に設けられたタップ穴５ａに固定手段となるビス10を螺合締着することで蓋体11が容器本体５に固定される。尚、容器本体５にタップ穴５ａを設けずにビス10としてタッピングビスを用いて固定しても良い。
【０１２７】
尚、ＲＦＩＤタグ１ｂも樹脂31の代わりにガラス容器に封止されたものでも良い。また、ＲＦＩＤタグ１ｂを可撓性の合成樹脂等により封止してＲＦＩＤタグ１ｂの本体自体が緩衝材を兼ねるように構成したものであっても良い。
【０１２８】
尚、図16には容器本体５の開口部７の内部に収容されたＲＦＩＤタグ１ｂから発生する磁界Ｈの様子を併せて図示したものである。
【０１２９】
図19は、蓋体11が平板からなるものであり、該蓋体11が容器本体５に対して直に当接され、固定手段となるビス10により固定された一例を示す。尚、前記各実施形態と同様に、容器本体５と蓋体11との間にスペーサ13を介在させたり、接着剤14により固定することでも良い。
【０１３０】
図20及び図21では金属製等の導電性材料で作られた蓋体11の中央部に容器本体５の開口部７に対応して該開口部７と反対側に上方に突出した円筒形状の箱部11ｄが設けられており、該箱部11ｄの内部には開口部７に対向した断面円形状の収納部15が形成されている。本参考例では、この収納部15にＲＦＩＤタグ１ｂの一部が収納される。
【０１３１】
そして、容器本体５の開口部７と蓋体11の収納部15の内部にＲＦＩＤタグ１ｂを収納し、容器本体５の開口部７側に蓋体11の収納部15を対向させた状態で該蓋体11を容器本体５に固定手段となるボルト及びナット17により固定してＲＦＩＤタグ１ｂが収容して覆われる。尚、５ｂはボルトを挿通する貫通穴である。
【０１３２】
尚、前述と同様に、蓋体11と容器本体５との間に非導電性材料からなるスペーサ13を介在させたり、接着剤14により蓋体11を容器本体５に接着しても良い。
【０１３３】
また、容器本体５の開口部７や蓋体11の収納部15に緩衝材や断熱材を介在させてＲＦＩＤタグ１ａを保護することで、より効果的にＲＦＩＤタグ１ｂの保全を確保すると共に温度の安定化を図ることでＲＦＩＤタグ１ｂの性能の安定化を図ることが出来る。
【０１３４】
図22（ａ），（ｂ）では、夫々開口部７を有する容器本体５と蓋体11との分割面である接合面からなる磁束漏洩路12に対して同心円盤状のアンテナコイル２ｂのコイル面方向が直交するように配置して収容したものである。
【０１３５】
尚、図22（ａ）では容器本体５と蓋体11との間にスペーサ13を介在させた一例であり、図22（ｂ）では容器本体５と蓋体11とを直に当接させた一例であるが、前述と同様に接着剤14により固定しても良い。
【０１３６】
図23（ａ）は円盤状の蓋体11を貫通して同心円盤状に形成されたアンテナコイル２ｂを有するＲＦＩＤタグ１ｂの径方向と一致する方向でアンテナコイル２ｂの中心に対応する部位から放射状にアンテナコイル２ｂの外径Ｄ_４に応じた長さを有するスリット11ｅを磁束漏洩路として設けたものである。尚、スリット11ｅは非導電性材料からなる接着剤や充填材で閉鎖することも出来る。
【０１３７】
また、図23（ｂ）はアンテナコイル２ｂの径方向に磁束漏洩路として１本だけスリット11ｅを設けたものである。尚、スリット11ｅは非導電性材料からなる接着剤や充填材で閉鎖することも出来る。
【０１３８】
同心円盤状のアンテナコイル２ｂを有するＲＦＩＤタグ１ｂから発生した漏れ磁束は磁束漏洩路12や磁束漏洩路となるスリット11ｅを通して回折現象により容器本体５の設置面となる底面７ａの上部に磁界Ｈを形成し、外部のリードライト端末機９等との間で電力送電媒体及び情報通信媒体である交流磁界を相互に送受信することが出来る。
【０１３９】
尚、前述の蓋体11は容器本体５に対してビス止め接合や接着剤接合により固定する以外にも嵌め合い接合、カシメ接合、ネジ嵌合接合、シーム接合、粘着材接合により磁束漏洩路を実用的なレベルで送受信可能な量の磁束が漏洩し得るように固定することでも良い。シーム結合とは金属板同士の間に高密度ポリエチレン等を介して接合部位を共巻きにして接合されたものである。
【０１４０】
【発明の効果】
本発明は、上述の如き構成と作用とを有するので、機械的強度の大きい金属等の導電性材料で作られた容器内にＲＦＩＤタグを収容しても容器の外部からリードライト端末機等とＲＦＩＤタグが通信を行なうことが出来る。
【０１４１】
即ち、ＲＦＩＤタグから出る磁束は導電性材料で作られた容器の影響を受けるが、一部の磁束は磁束漏洩路を通って外部に漏洩するので、その漏洩磁束を利用してリードライト端末機等と通信出来る。
【０１４２】
また、リードライト端末機等からの電磁波を構成する磁束の一部は磁束漏洩路を通って容器内に入り、ＲＦＩＤタグのアンテナコイルで検出される。
【０１４３】
従って、上記収容構造によれば、ＲＦＩＤタグは機械的強度の大きい導電性材料で作られた容器で保護された状態であっても容器に形成した磁束漏洩路を通る漏洩磁束を利用してＲＦＩＤタグと容器の外部との間で通信を行うことが出来る。
【０１４４】
また、容器を分割可能な複数の分割体により構成し、その分割面、或いは該分割体自身の少なくとも一方に磁束漏洩路を形成することが出来、この場合には容器に収容するＲＦＩＤタグの保守点検や交換等を容易に行なうことが出来る。
【０１４５】
また、容器を構成する分割体を、開口部を有する容器本体と、その開口部を覆う蓋体により構成し、該蓋体を固定手段により容器本体に固定することが出来る。この場合には磁束漏洩路を分割面に容易に形成することが出来ると共に、容器内へのＲＦＩＤタグの配置が容易に出来る。
【０１４６】
また、蓋体を非導電性材料で作られたスペーサを介して容器本体に固定手段により固定した場合には任意の寸法の磁束漏洩路を容易に形成することが出来る。
【０１４７】
また、上記何れかのＲＦＩＤタグの収容構造において、ＲＦＩＤタグに接して非導電性材料で作られた緩衝材または断熱材を設けた場合には外部衝撃または外部温度の急変からＲＦＩＤタグを有効に保護することが出来る。
【０１４８】
また、分割体を開閉手段により互いに開閉可能に連結した場合には常時は開いて使用する容器が閉じている状態でも、容器内のＲＦＩＤタグと外部のリードライト端末機等との間で通信を行なうことが出来る。
【０１４９】
上記何れかのＲＦＩＤタグの収容構造において、アンテナコイルをシリンダ状に形成したものを使用することが出来、これにより、容易に入手出来るＲＦＩＤタグによって本発明に係るＲＦＩＤタグの収容構造を構成出来る。
【０１５０】
また、本発明に係るＲＦＩＤタグの設置構造によれば、導電性部材の管理をＲＦＩＤタグによって容易に行なうことが出来る。
【０１５１】
特にシリンダ状のアンテナコイルを有し、棒状に形成されたＲＦＩＤタグは、極めて小型化出来るので導電性部材に許容される設置面積が小さい場合でも容易に設置出来る。
【図面の簡単な説明】
【図１】 本発明に係るＲＦＩＤタグの収容構造により導電性材料で作られた容器内に収容したＲＦＩＤタグを導電性部材であるガスボンベに取り付けて利用する様子を示す図である。
【図２】 導電性材料で作られた断面方形状の容器本体の開口部に収容配置されたＲＦＩＤタグを一部が該開口部内に挿入される凸部を有する板状の蓋体により覆う様子を示す分解説明図である。
【図３】 図２の板状の蓋体を各種の固定手段により容器本体に固定した様子を示す断面説明図である。
【図４】 シリンダ状のアンテナコイルを有するＲＦＩＤタグの構成を示す正面説明図である。
【図５】 ＲＦＩＤタグの制御系の構成を示すブロック図である。
【図６】 シリンダ状のアンテナコイルを有するＲＦＩＤタグに発生する磁界の様子を示す模式図である。
【図７】 導電性材料で作られた断面円形状の容器本体の開口部に収容配置されたＲＦＩＤタグを一部が該開口部内に挿入される凸部を有する板状の蓋体により覆う様子を示す分解説明図である。
【図８】 導電性材料で作られた容器本体の開口部に収容配置されたＲＦＩＤタグを平坦な板状の蓋体により覆う様子を示す断面説明図である。
【図９】 導電性材料で作られた断面方形状の容器本体の開口部に収容配置されたＲＦＩＤタグを、該ＲＦＩＤタグの一部を収納する収納部を形成した板状の蓋体により覆う様子を示す分解説明図である。
【図10】 導電性材料で作られた容器本体の開口部に収容配置されたＲＦＩＤタグを、該ＲＦＩＤタグの一部を収納する収納部を形成した板状の蓋体により覆う様子を示す断面説明図である。
【図11】 導電性材料で作られた容器本体の開口部にシリンダ状のＲＦＩＤタグの軸方向が、その開口面と直交する方向で配置収容された様子を示す断面説明図である。
【図12】 板状の蓋体に直線状のスリットを形成した場合の一例を示す分解説明図である。
【図13】 本発明に係るＲＦＩＤタグの収容構造をノート型パソコンに適用した場合の一例を示す斜視説明図である。
【図14】 本発明に係るＲＦＩＤタグの通信方法をノート型パソコンに適用した場合の一例を示す平面説明図及び側面説明図である。
【図15】 導電性材料で作られた容器本体の開口部に収容配置された同心円盤状のアンテナコイルを有するＲＦＩＤタグを一部が該開口部内に挿入される凸部を有する蓋体により覆う様子を示す分解説明図である。
【図16】 図15の蓋体を固定手段により容器本体に固定した様子を示す断面説明図である。
【図17】 同心円盤状のアンテナコイルを有するＲＦＩＤタグの構成を示す正面及び側面説明図である。
【図18】 同心円盤状のアンテナコイルを有するＲＦＩＤタグに発生する磁界の様子を示す模式図である。
【図19】 容器本体の開口部に収容配置されたＲＦＩＤタグを平坦な板状の蓋体により覆う様子を示す断面説明図である。
【図20】 導電性材料で作られた断面円形状の容器本体の開口部に収容配置されたＲＦＩＤタグを、該ＲＦＩＤタグの一部を収納する収納部を形成した板状の蓋体により覆う様子を示す分解説明図である。
【図21】 導電性材料で作られた容器本体の開口部に収容配置されたＲＦＩＤタグを、該ＲＦＩＤタグの一部を収納する収納部を形成した蓋体により覆う様子を示す断面説明図である。
【図22】 導電性材料で作られた容器本体の開口部に同心円盤状のアンテナコイルを有するＲＦＩＤタグのコイル面方向が、その開口面と直交する方向で配置収容された様子を示す断面説明図である。
【図23】 板状の蓋体に各種のスリットを形成した場合の一例を示す分解説明図である。
【符号の説明】
１ａ，１ｂ…ＲＦＩＤタグ
２ａ，２ｂ…アンテナコイル
３…コア部材
４…半導体ＩＣチップ
４ａ…ＣＰＵ
４ｂ…メモリ
４ｃ…送受信機
４ｄ…コンデンサ
５…容器本体
５ａ…タップ穴
５ｂ…貫通穴
６…ガラス容器
７…開口部
７ａ…底面
７ｂ…側面
８…樹脂
９…リードライト端末機
10…ビス
11…蓋体
11ａ…嵌合部
11ｂ…鍔部
11ｃ…貫通穴
11ｄ…箱部
11ｅ…スリット
12…磁束漏洩路
13…スペーサ
14…接着剤
15…収納部
16…ガスボンベ
17…ボルト及びナット
21…ノート型パソコン
21ａ…本体側
21a1…キーボード
21a2…面
21a3…凹部
21ｂ…蓋側
21b1…液晶ディスプレイ
21b2…面
21ｃ…ヒンジ部材
31…樹脂
Ａ…容器[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an accommodation structure and an installation structure of an RFID tag having an antenna coil and a control unit.
[0002]
[Prior art]
Conventionally, RFID tags (Radio Frequency IDentification TAGs) are classified into an electromagnetic induction type and an electromagnetic coupling type, and both use non-contact communication with a read / write terminal using an electromagnetic wave.
[0003]
The RFID tag has an antenna coil and a control unit, and when the antenna coil receives a transmission signal from the read / write terminal, the control unit accumulates it in the capacitor as power, and stores the power in the storage unit. The information such as the ID code is transmitted from the antenna coil to the read / write terminal again.
[0004]
As a transmission / reception method, there are an ASK (Amplitude Shift Keying) method and an FSK (Frequency Shift Keying) method. The former performs transmission / reception by amplitude shift modulation of electromagnetic waves, and the latter performs transmission / reception by frequency modulation of electromagnetic waves.
[0005]
When a general RFID tag is divided into antenna coil types, a disk-shaped antenna coil using a circular air-core coil and a cylinder-shaped antenna coil in which an insulation-coated copper wire such as an enameled wire is wound around a rod-shaped ferrite core. There are various types, and the outer shape is formed in a disk shape corresponding to the shape of each antenna coil, and the latter is formed in a bar shape.
[0006]
An RFID tag having a disk-shaped antenna coil performs communication using a change in magnetic flux in the surface direction of a circular coil, and an RFID tag having a cylindrical antenna coil performs communication using a change in magnetic flux in the axial direction. .
[0007]
By the way, an electromagnetic wave propagates an alternating electric field and a magnetic field with a phase of 90 degrees. When an alternating magnetic flux due to the magnetic field change intersects with a conductive member such as iron, aluminum, or copper, the conductive member enters the conductive member. An eddy current is generated, and a magnetic flux is generated in a direction that cancels the alternating magnetic field by the eddy current.
[0008]
For this reason, the RFID tag has conventionally been installed as far away from the conductive member as possible.
[0009]
In order to protect the RFID tag from external stress and impact in storing, transporting and using the RFID tag, the periphery is often covered with a container or the like. In order to communicate, it is not possible to use a conductive material that serves as a barrier for communication as a container material, and it is generally used in a state where an RFID tag is accommodated in a container made of a non-conductive material such as plastic. Met.
[0010]
[Problems to be solved by the invention]
However, in the above-described conventional example, a container using a non-conductive material such as plastic has a problem in durability because resistance to external force is not so great. For example, when RFID tags housed in plastic containers are attached to a large number of steel plates for individual management, the steel plates easily fall, collapse, collapse, etc. during transportation and storage, and the plastic containers are damaged by the impact and stored. There is a great risk of damage to the RFID tag.
[0011]
The present invention solves the above-mentioned problems, and the object of the present invention is to read / write from the outside of the container even if the RFID tag is accommodated in a container made of a conductive material such as a metal having high mechanical strength. It is an object of the present invention to provide a new RFID tag housing structure in which a terminal or the like can communicate with an RFID tag and an RFID tag installation structure using the housing structure.
[0012]
[Means for Solving the Problems]
Even if the present inventors accommodate the RFID tag in a container made of a conductive material such as a metal having a high mechanical strength, the magnetic flux leakage path is formed by forming a magnetic flux leakage path by a gap or the like in the container. The present invention has been completed on the basis of the new knowledge that communication between an RFID tag and a read / write terminal or the like becomes possible by utilizing a leakage magnetic flux passing through the terminal.
[0013]
That is, when communication is performed between an RFID tag and a read / write terminal using electromagnetic waves, the sensitivity of the device greatly affects the sensitivity of the device. The level of sensitivity has increased considerably, and practical communication is possible even with a small amount of magnetic flux.
[0014]
Based on such a technical background, the inventors have conducted various researches and experiments. As a result, when the RFID tag is accommodated in a container made of a conductive material, a part of the magnetic flux used for communication is used. Is attenuated under the influence of a container made of a conductive material, but some magnetic flux can exist in a confined space inside the container made of a conductive material, and a magnetic flux leakage path to the container made of a conductive material. It was found that a part of the magnetic flux existing in the space leaks to the outside through the magnetic flux leakage path.
[0015]
It has been found that communication at a practical level is possible using the leakage magnetic flux.
[0016]
In order to achieve the above object, an RFID tag housing structure according to the present invention comprises: Cylindrical Has antenna coil and control unit And the whole was formed in a rod shape RFID tag The Housed in a container made of conductive material Shi In that container Consists of a gap formed by a split surface for communication by electromagnetic waves between the RFID tag and the outside of the container Form a magnetic flux leakage path The magnetic flux leakage path extends from the vicinity of the tip of the RFID tag accommodated in the container to the outside of the container. It is characterized by that.
[0017]
According to the above configuration, the magnetic flux emitted from the RFID tag is affected by a container made of a conductive material, but a part of the magnetic flux leaks to the outside through the magnetic flux leakage path. Can communicate with read / write terminals.
[0018]
A part of the magnetic flux constituting the electromagnetic wave from the read / write terminal or the like enters the container through the magnetic flux leakage path and is detected by the antenna coil of the RFID tag.
[0019]
Therefore, according to the housing structure, the RFID tag uses the leakage magnetic flux that passes through the magnetic flux leakage path formed in the container even when it is protected by the container made of a conductive material having a high mechanical strength. Communication can be performed between the tag and the outside of the container.
[0020]
Further, the container is constituted by a plurality of divided bodies that can be divided, and On the dividing plane A magnetic flux leakage path can be formed. In this case, maintenance inspection, replacement, etc. of the RFID tag accommodated in the container can be easily performed. Further, the RFID tag axial direction and the dividing surface may be arranged in parallel. .
[0021]
Moreover, the division body which comprises the said container is comprised by the container main body which has an opening part, and the cover body which covers the opening part, and this cover body can be fixed to the said container main body by a fixing means. In this case, the magnetic flux leakage path can be easily formed on the dividing surface, and the RFID tag can be easily placed in the container.
[0022]
Moreover, the said cover body can be fixed to the said container main body by the said fixing means via the spacer made from the nonelectroconductive material. In this case, a magnetic flux leakage path having an arbitrary size can be easily formed.
[0023]
In any of the RFID tag housing structures described above, a buffer material or a heat insulating material made of a non-conductive material can be provided in contact with the RFID tag. In this case, the RFID tag can be effectively protected from external impact or sudden change in external temperature.
[0024]
The divided bodies can be connected to each other by an opening / closing means so as to be opened and closed. In this case, communication can be performed between the RFID tag in the container and an external read / write terminal or the like even when the container that is normally opened and used is closed.
[0025]
An RFID tag installation structure according to the present invention is characterized in that any of the RFID tag housing structures described above is installed on an installation surface of a conductive member.
[0026]
According to the above installation structure, the conductive member can be easily managed by the RFID tag.
[0027]
In particular, an RFID tag having a cylindrical antenna coil and formed in a rod shape can be extremely miniaturized, so that it can be easily installed even when the installation area allowed for the conductive member is small.
[0028]
DETAILED DESCRIPTION OF THE INVENTION
Each embodiment of the RFID tag accommodation structure and installation structure according to the present invention will be described in detail with reference to the drawings. 1 to 14 are diagrams for explaining the housing structure and installation structure of an RFID tag having a cylindrical antenna coil, and FIGS. As a reference example It is a figure explaining the accommodation structure and installation structure of an RFID tag which have a concentric disk shaped antenna coil.
[0029]
First, a housing structure and an installation structure of an RFID tag having a cylindrical antenna coil will be described with reference to FIGS. FIG. 1 is a view showing a state in which an RFID tag accommodated in a container made of a conductive material by using an RFID tag accommodation structure according to the present invention is attached to a gas cylinder as a conductive member and used.
[0030]
Further, FIG. 2 shows that an RFID tag accommodated in an opening of a container body having a rectangular cross section made of a conductive material is covered with a plate-like lid having a convex part partially inserted into the opening. FIG. 3 is a cross-sectional explanatory view showing a state in which the plate-like lid body of FIG. 2 is fixed to the container body by various fixing means.
[0031]
4 is a front explanatory view showing the configuration of an RFID tag having a cylindrical antenna coil, FIG. 5 is a block diagram showing the configuration of a control system of the RFID tag, and FIG. 6 is an RFID tag having a cylindrical antenna coil. It is a schematic diagram which shows the mode of the magnetic field to generate | occur | produce.
[0032]
Further, FIG. 7 shows that an RFID tag accommodated in an opening of a container body having a circular cross section made of a conductive material is covered with a plate-like lid having a convex part partially inserted into the opening. It is decomposition | disassembly explanatory drawing which shows a mode.
[0033]
FIG. 8 is a cross-sectional explanatory view showing a state in which the RFID tag accommodated in the opening of the container body made of a conductive material is covered with a flat plate-shaped lid.
[0034]
FIG. 9 shows an RFID tag accommodated in an opening of a container body having a rectangular cross section made of a conductive material, and a plate-like lid body that forms a storage portion for storing a part of the RFID tag. It is a decomposition explanatory drawing which shows a mode that it covers.
[0035]
FIG. 10 shows a state in which an RFID tag accommodated in an opening of a container body made of a conductive material is covered with a plate-like lid that forms an accommodating portion for accommodating a part of the RFID tag. FIG.
[0036]
FIG. 11 is a cross-sectional explanatory view showing a state in which the axial direction of the cylindrical RFID tag is arranged and accommodated in a direction perpendicular to the opening surface of the container body made of a conductive material, and FIG. It is decomposition | disassembly explanatory drawing which shows an example at the time of forming a linear slit in a plate-shaped cover body.
[0037]
FIG. 13 is a perspective explanatory view showing an example in which the RFID tag housing structure according to the present invention is applied to a notebook personal computer (hereinafter simply referred to as “notebook personal computer”), and FIG. 14 is an RFID according to the present invention. It is plane explanatory drawing and a side explanatory drawing which show an example at the time of applying the communication method of a tag to a notebook type personal computer.
[0038]
In The RFID tags 1a and 1b that are preferably employed are electromagnetic coupling type and electromagnetic induction type RFID tags. In each of the following embodiments, an embodiment using an electromagnetic induction type RFID tag will be described below. To do.
[0039]
The RFID tag 1a shown in FIGS. 1 to 14 is formed by integrally connecting a cylindrical antenna coil 2a and a semiconductor IC chip 4 serving as a control unit directly without using a printed circuit board or the like. Thus, the RFID tag 1a can be downsized.
[0040]
A cylindrical core member 3 such as an iron core or ferrite is inserted in the axial direction (left and right direction in FIG. 4) inside the antenna coil 2a formed in a cylindrical shape by winding a single wire. The antenna coil 2a and the core member 3 The semiconductor IC chip 4 and the like are integrally formed so as to have a rod shape as a whole.
[0041]
The semiconductor IC chip 4 is formed by integrally packaging an IC (semiconductor integrated circuit) chip, an LSI (semiconductor large scale integrated circuit) chip, or the like. As shown, a CPU 4a serving as a control unit, a memory 4b serving as a storage unit, a transceiver 4c, and a capacitor 4d serving as a power storage unit are provided.
[0042]
A signal transmitted from the read / write terminal 9 shown in FIG. 1 is transmitted to the CPU 4a via the transceiver 4c, and the electric power is stored in the capacitor 4d. Note that there may be no capacitor 4d serving as a power storage means, and power may be continuously supplied from the external read / write terminal 9 to the semiconductor IC chip 4.
[0043]
The CPU 4a is a central processing unit, and reads programs and various data stored in the memory 4b, performs necessary calculations and determinations, and performs various controls.
[0044]
In the memory 4b, various programs for operating the CPU 4a and RFID tags 1a and 1b are stored in a container A made of a conductive material, which will be described in detail later, and a product including a conductive member in which the container A is installed And various information such as history data and lot management data regarding parts and the like are stored.
[0045]
RFID tags 1a and 1b Antenna coils 2a and 2b having an air core or a core member 3 using a radio communication system of amplitude shift keying (ASK) with a radio frequency of 1 wave, a wide resonance frequency band, and a wire diameter of several tens of microns. RFID tags 1a and 1b using CMOS-IC with very low power consumption and incorporating special transmission / reception circuits are employed.
[0046]
The RFID tags 1a and 1b use an amplitude shift keying (ASK) wireless communication system. By using such an ASK system, there is very little risk of a frequency shift due to the influence of the conductive member as in the FSK system, a decrease in received power or a disturbance in the communication signal, and a magnetic flux leakage path. It becomes possible to communicate stably with the leakage flux from 12.
[0047]
Furthermore, according to the results of experiments conducted by the present inventors, it was found that the magnetic field H propagates from a narrow gap due to diffraction phenomenon even in a narrow gap, and a predetermined slight gap is formed. Thus, it has been found that an AC magnetic field, which is a power transmission medium and an information communication medium, can be transmitted and received between the RFID tags 1a and 1b and the external read / write terminal 9 or the like.
[0048]
In addition, as a conductive material that affects the communication by generating an eddy current due to the magnetic field H generated when the RFID tags 1a and 1b communicate and carry power, an eddy current is generated to attenuate the original magnetic flux. In addition to stainless steel plate, copper plate, aluminum plate, iron, cobalt, nickel and alloys thereof, ferromagnetic metals such as ferrite, or paramagnetic metals such as aluminum, copper, chrome, etc. Plastic or the like is applicable.
[0049]
As shown in FIG. 4, the RFID tag 1a has an outer diameter D in the radial direction of the antenna coil 2a. ₂ Outer diameter D according to ₁ The entire circumference is covered with a glass container 6 made of a glass material which is a non-conductive material having a slag.
[0050]
The length L in the axial direction of the glass container 6 of the RFID tag 1a employed in this embodiment. ₁ Is about 7 mm to 15.7 mm and the outer diameter D ₁ Is about 2.12 mm to 4.12 mm. Accordingly, the opening 7 of the container main body 5 which is a plurality of split bodies made of a conductive material is the length L of the RFID tag 1a. ₁ And outer diameter D ₁ It is formed in the size according to. The RFID tag 1a has a weight of about 55 mg to 400 mg.
[0051]
The length L in the axial direction of the glass container 6 of the RFID tag 1a employed in the present embodiment is described below. ₁ , Outer diameter D ₁ , And the axial length L of the antenna coil 2a ₂ , Outer diameter D ₂ An example is shown.
[0052]
[Table 1]

[0053]
As an example of the antenna coil 2a, for example, a state in which a copper wire having a diameter of about 30 μm is wound in a cylindrical shape in the axial direction with multiple layers in the radial direction by single wire winding, and the core member 3 is inside the antenna coil 2a In this case, the inductance was about 9.5 mH (frequency 125 kHz), and the capacitance of the capacitor separately connected to the antenna coil 2a for resonance was about 170 pF (frequency 125 kHz).
[0054]
On the other hand, in FIG. 1, reference numeral 16 denotes a gas cylinder made of a metal conductive member containing oxygen gas, acetylene gas, or the like as an example of an article to be managed, and the gas cylinder 16 includes a gas cylinder according to the present invention. A container A made of a conductive material that houses the RFID tags 1a and 1b is attached by the housing structure.
[0055]
The RFID tags 1a and 1b store a unique ID code number assigned to each gas cylinder 16. The read / write terminal 9 is used to read out the ID code numbers stored in the RFID tags 1a and 1b to read the gas cylinders. 16 product management is possible.
[0056]
A container A made of a conductive material shown in FIG. 2 includes a container body 5 having a rectangular cross section and a cover 11 covering the opening 7 of the container body 5, and the RFID tag 1 a is attached to the container body 5. The container body 5 and the lid body 11 are joined to each other and fixed with screws 10 serving as fixing means. The tag 1a is covered and protected.
[0057]
In addition, the container A made of a conductive material may be configured such that the RFID tag 1a is accommodated inside by joining the multi-divided parts by a plurality of other divided bodies.
[0058]
The RFID tag 1a is inserted into the opening 7 of the container body 5, and its axial direction (left-right direction in FIG. 3) is parallel to the bottom surface 7a serving as the installation surface of the opening 7 so as to be substantially in contact with the bottom surface 7a. It is installed directly without a spacer.
[0059]
The outer periphery of the glass container 6 of the RFID tag 1 a embedded in the opening 7 is filled and fixed with a resin 8, an adhesive, or the like, which is a nonconductive material. Note that a cushioning material such as a sponge or glass wool or a heat insulating material made of a non-conductive material may be provided in contact with the RFID tag 1a on the outer periphery of the RFID tag 1a embedded in the opening 7.
[0060]
A lid 11 having a rectangular cross section made of a conductive material such as a metal is disposed on the surface side of the RFID tag 1a accommodated in the opening 7 so as to cover the surface side of the RFID tag 1a. 11 is fixed to the container body 5 by screws 10 as fixing means.
[0061]
The RFID tag 1a is accommodated in a container A composed of a container body 5 and a lid body 11 so as to cover the periphery, and a magnetic flux leakage path 12 comprising a joint surface that is a split surface between the container body 5 and the lid body 11 is formed. The communication is performed by using the leakage magnetic flux passing through the magnetic flux leakage path 12.
[0062]
The main body of the RFID tag 1a is formed in a rod shape, and the opening 7 is formed in a cross-sectional square shape corresponding to the size of the RFID tag 1a. The lid 11 has a square fitting portion 11 a having a shape corresponding to the shape of the opening 7 at the center, protruding toward the opening 7, and by fitting the fitting portion 11 a into the opening 7. The lid body 11 is screwed and fastened to the tap hole 5a provided in the container body 5 through the through hole 11c formed in the flange 11b of the lid body 11 and screwed and fastened. It is fixed to the container body 5.
[0063]
As a fixing means, the container body 5 may be fixed using a tapping screw as the screw 10 without providing the tap hole 5a.
[0064]
The RFID tag 1a may be fixed by filling a resin 8 or the like made of a non-conductive material, instead of the glass container 6 and sealed with a resin or the like.
[0065]
FIG. 6 shows a state of the magnetic field H generated from the RFID tag 1a in a free state.
[0066]
The axial end of the antenna coil 2a of the RFID tag 1a and the axial end of the glass container 6 are shown in Table 1 above. ₁ , L ₂ 1 and FIG. 2, a predetermined spacing is formed between the side surface 7b of the opening 7 shown in FIGS. 1 and 2 and the end of the antenna coil 2a in the axial direction. A magnetic flux penetrating the coil 2a is easily formed and contributes to the formation of the magnetic field H.
[0067]
Further, as shown in FIG. 3A, a contact surface serving as a split surface that abuts each other is formed between the container body 5 fixed by the screw 10 and the lid 11, and magnetic flux is generated by this contact surface. A magnetic flux leakage path 12 for leakage is formed.
[0068]
The gap for forming the magnetic flux leakage path 12 is changed depending on the desired magnitude of the leakage magnetic flux, and is adjusted by, for example, the tightening force of the screw 10 or the degree of rough surface of the contact surface. When the magnetic flux leakage path 12 is formed by roughening, both opposing surfaces are in dispersed contact with each other, and the magnetic flux leakage path 12 is formed using a non-contact portion that is dispersed.
[0069]
The surface roughness of the contact surface is processed so that one of the surfaces facing each other has a surface roughness of about 0.04 μm, thereby forming a clearance of about 0.08 μm as a gap between the contact surfaces, thereby ensuring the desired electromagnetic wave leakage. Is done.
[0070]
In FIG. 3 (b), a spacer 13 made of a non-conductive material such as rubber or resin is interposed between the container body 5 and the lid 11 and fixed with screws 10 as fixing means. Thus, a relatively large thickness magnetic flux leakage path 12 can be secured.
[0071]
When a spacer 13 made of a non-conductive material is interposed between the lid body 11 and the container body 5, the non-forming formed between the container body 5 and the lid body 11 while ensuring sealing performance. The conductive material is preferable because the leakage magnetic flux increases.
[0072]
In FIG. 3C, the container body 5 and the lid 11 are fixed by an adhesive 14 made of a non-conductive material as a fixing means, and a contact surface that becomes a substantially smooth divided surface by adhesion. And a magnetic flux leakage path 12 for leaking magnetic flux is formed by this contact surface.
[0073]
Further, when the lid 11 is fixed to the container body 5 with the adhesive 14, the lid 11 can be fixed with a simple structure, and is sealed by the adhesive 14 layer interposed between the lid 11 and the container body 5. In addition, since a physical magnetic flux leakage path 12 made of a non-conductive material is formed between the container body 5 and the lid 11, the leakage magnetic flux increases.
[0074]
The lid 11, the spacer 13, and the container main body 5 may be bonded by an adhesive 14 with a spacer 13 interposed between the lid 11 and the container main body 5.
[0075]
According to the results of experiments conducted by the present inventors, it has been found that the magnetic field H propagates from the narrow gap due to the diffraction phenomenon even in a narrow gap. A magnetic flux leakage path 12 is formed so that an amount of magnetic flux that can be transmitted and received at a practical level can be leaked, and by verifying it, an electric power transmission medium between the RFID tag 1a and an external lead terminal and the like It has been found that an AC magnetic field, which is an information communication medium, can be transmitted and received mutually.
[0076]
The path length of the magnetic flux leakage path 12 and the gap width (average gap width) of the magnetic flux leakage path 12 need only be equal to or greater than the minimum value at which electromagnetic waves can be transmitted to the external read / write terminal 9. A gap width (average gap width) of about .08 μm is sufficient.
[0077]
The container main body 5 and the lid 11 which are a plurality of divided bodies constituting the container A that accommodates the RFID tag 1a and covers the entire outer peripheral surface are made of a conductive material, and between the container main body 5 and the lid 11 Since the magnetic flux leakage path 12 is formed, it becomes stronger against external stress and shock, and electromagnetic waves leak through the magnetic flux leakage path 12, and the RFID tag 1a and the external read / write terminal 9 and the like. AC magnetic field which is a power transmission medium and an information communication medium can be transmitted / received to / from each other.
[0078]
Accordingly, the RFID tag 1a is installed in a close contact with the bottom surface 7a of the opening 7 provided on the container body 5 with the surface side opened, and the surface of the opening 7 is made of a conductive material such as metal. 3A to 3C, the magnetic field H due to the leakage magnetic flux is generated on the surface side of the container body 5, and the leakage magnetic flux passing through the magnetic flux leakage path 12 as shown in FIGS. 3 (a) to 3 (c). Can be communicated between the RFID tag 1a accommodated in the container A constituted by the container body 5 and the lid 11 and the external read / write terminal 9 or the like.
[0079]
The opening 7 shown in FIG. 2 is an example in which the opening 7 shown in FIG. 2 is formed in a square shape corresponding to the square lid 11, but as shown in FIG. 7, a disk-shaped container body 5 and a lid 11 are prepared. An opening 7 having a circular cross section may be formed in the container body 5 to accommodate and install the RFID tag 1a.
[0080]
In this case, the shape of the container body 5 is manufactured in advance assuming the opening 7, or the opening 7 in FIG. It is also possible to form. Further, the opening 7 having a circular cross section shown in FIG. 7 can be easily formed by a drill or the like.
[0081]
Further, the direction of the magnetic flux formed by the antenna coil 2a is arranged in the direction (left and right direction in FIG. 3) that coincides with the joint surface that is a split surface between the lid body 11 and the container body 5. Propagation due to the diffraction phenomenon of the magnetic flux can be effectively performed, contributing to the formation of the magnetic field H formed outside the container A.
[0082]
According to the above configuration, a part of the magnetic flux emitted from the RFID tag 1a is distributed on the bottom surface 7a which is the installation surface of the container body 5, and it leaks to the outside from the magnetic leakage path 12, and uses the leakage magnetic flux. Thus, communication with the read / write terminal 9 outside the lid 11 is possible.
[0083]
Further, the magnetic flux emitted from the transmitting device such as the read / write terminal 9 enters the opening 7 covered with the lid 11 from the magnetic flux leakage path 12, and a part thereof is detected by the antenna coil 2a of the RFID tag 1a. .
[0084]
Accordingly, the RFID tag 1a can be accommodated and installed in the opening 7 of the container body 5 and communicated with the outside in a state protected by the lid 11 made of a conductive material such as metal having high mechanical strength. I can do it.
[0085]
Further, by forming the opening 7 in the container body 5 and arranging the RFID tag 1a with the bottom surface 7a of the opening 7 as the installation surface, a part of the magnetic flux emitted from the RFID tag 1a or toward the RFID tag 1a. Part of the magnetic flux is distributed in the space of the opening 7 and can be used to communicate through the magnetic flux leakage path 12.
[0086]
In addition, the RFID tag 1a is accommodated in the container A composed of the container body 5 and the lid body 11, so that the maintenance of the RFID tag 1a can be ensured, and an external force acts on the product provided with the container A to receive an impact. However, there is no fear that the RFID tag 1a is damaged.
[0087]
In addition to fixing the lid 11 to the container body 5 with the screw 10 or the adhesive 14, the structure can be opened and closed by rotating through a shutter structure or a hinge member that can be opened and closed by a slide type or the like. Also good.
[0088]
FIG. 8 is a flat plate from which the fitting portion 11a of the above embodiment in which the lid 11 protrudes toward the opening 7 is removed, and the lid 11 is brought into direct contact with the container body 5, An example of fixing with screws 10 as fixing means is shown.
[0089]
As in the above-described embodiment, a spacer 13 made of a non-conductive material may be interposed between the lid 11 and the container body 5 or the lid 11 may be bonded to the container body 5 with an adhesive 14.
[0090]
9 and 10, the lid 11 made of a conductive material such as a metal has a rectangular shape that protrudes upward from the center of the lid 11 corresponding to the opening 7 of the container body 5. A box portion 11d is provided, and a storage portion 15 facing the opening 7 is formed inside the box portion 11d. In the present embodiment, a part of the RFID tag 1a is stored in the storage unit 15.
[0091]
Then, the RFID tag 1 a is stored in the opening 7 of the container body 5 and the storage part 15 of the lid 11, and the storage part 15 of the lid 11 is opposed to the opening 7 of the container body 5. The lid 11 is fixed to the container body 5 with bolts and nuts 17 serving as fixing means, and the RFID tag 1a is accommodated and covered. Reference numeral 5b denotes a through hole through which a bolt is inserted.
[0092]
That is, as shown in FIGS. 9 and 10, the lid body 11 of the present embodiment is configured in a hat shape, and the hat-shaped lid body 11 is brought into direct contact with the container body 5, and bolts and The nut 17 is fastened and fixed. As described above, a spacer 13 made of a non-conductive material may be interposed between the lid 11 and the container body 5 or the lid 11 may be bonded to the container body 5 with an adhesive 14.
[0093]
Further, by protecting the RFID tag 1a by interposing a cushioning material or a heat insulating material in the opening 7 of the container body 5 or the storage portion 15 of the lid 11, the maintenance of the RFID tag 1a can be more effectively secured and the temperature can be increased. As a result, the performance of the RFID tag 1a can be stabilized.
[0094]
9 and 10, the opening 7 of the container body 5 and the storage part 15 of the lid 11 are formed in a square shape. However, as shown in FIG. 7, the disk-shaped container body 5 and the lid are formed. 11 may be prepared, and the opening 7 of the container body 5 and the storage portion 15 of the lid 11 may be formed in a circular cross section.
[0095]
In FIG. 11, the cylindrical antenna coil 2a is arranged so that the axial direction of the cylinder-shaped antenna coil 2a is orthogonal to the magnetic flux leakage path 12 formed of the joint surface which is a split surface between the container body 5 having the opening 7 and the lid body 11. It is what was contained.
[0096]
FIG. 11 shows an example in which a spacer 13 is interposed between the container body 5 and the lid body 11, but the spacer body 13 is omitted and the container body 5 and the lid body 11 are brought into direct contact with each other as described above. The bolts and nuts 17 may be fastened and fixed, or the adhesive 14 may be used.
[0097]
FIG. 12 shows the length L of the antenna coil 2a in a direction that coincides with the axial direction of the RFID tag 1a having the antenna coil 2a formed in a cylindrical shape through the flat lid body 11. ₂ Is provided with a slit 11e serving as a magnetic flux leakage path having a length corresponding to the above. The slit 11e can be closed with an adhesive or filler made of a non-conductive material.
[0098]
Leakage magnetic flux is diffracted and generated through a slit 11e serving as a magnetic flux leakage path formed in the lid 11, and a magnetic field H is formed on the upper surface of the bottom surface 7a serving as an installation surface of the opening 7. Thereby, the effect of mutually transmitting / receiving the alternating magnetic field which is a power transmission medium and an information communication medium between the RFID tag 1a and the external read / write terminal 9 or the like can be further improved.
[0099]
In addition to the lid 11, Container body 5 A magnetic flux leakage path such as a slit may be formed in the divided body itself.
[0100]
In FIG. 13 and FIG. 14, reference numeral 21 denotes a notebook personal computer that becomes a container composed of a plurality of divided bodies made of a conductive material, and the exterior is covered with a metal case that becomes a conductive member.
[0101]
The notebook computer 21 is configured as a split container with a main body side 21a made of a conductive material provided with a keyboard 21a1 and a lid side 21b made of a conductive material provided with a liquid crystal display 21b1. It is a means and is connected via a hinge member 21c serving as a rotation shaft so that it can be opened and closed.
[0102]
As shown in FIG. 14B, the notebook-type personal computer 21 has the main body side 21a and the lid side 21b closed with the surfaces 21a2 and 21b2 facing each other, and the lid side 21b opened to the main body side 21a. Although it is an example of the goods which can be performed, it is applicable also to the product management of various articles | goods, such as a portable information terminal (mobile personal computer) and a mobile telephone of the other similar structure.
[0103]
An RFID tag 1a is arranged between the surface 21b2 on the lid side 21b of the notebook computer 21 and the surface 21a2 on the main body side 21a. The memory 4b of the RFID tag 1a stores, for example, history data, lot management data, and the like of the notebook computer 21 provided with the RFID tag 1a.
[0104]
The RFID tag 1a stores unique code information of the notebook personal computer 21. The unique code information is read by the read / write terminal 9 or the like, and history data, lot management data, and the like are browsed from another database. It is also possible.
[0105]
In the present embodiment, the RFID tag 1a is fixed to the surface 21b2 on the lid side 21b with an adhesive or adhesive material made of a non-conductive material, and the RFID tag is placed on a portion corresponding to the RFID tag 1a on the surface 21a2 on the main body side 21a. A recess 21a3 corresponding to the size of 1a is formed.
[0106]
Then, as shown in FIG. 14 (a), it is formed by leakage magnetic flux generated from the magnetic flux leakage path 12 which is a minute gap formed between the surface 21a2 of the main body side 21a and the surface 21b2 of the lid side 21b. Information stored in the RFID tag 1a can be taken out by the read / write terminal 9 or the like using the magnetic field H.
[0107]
Since the magnetic flux leakage path 12 which is a minute gap formed by the surface 21a2 on the main body side 21a and the surface 21b2 on the lid side 21b is formed in a state opened in the axial direction of the antenna coil 2a of the RFID tag 1a, Therefore, a magnetic flux penetrating the antenna coil 2a is easily formed, which contributes to the formation of the magnetic field H.
[0108]
The magnetic field H can propagate from the magnetic flux leakage path 12 which is a minute gap formed by the surface 21a2 on the main body side 21a and the surface 21b2 on the lid side 21b, and the leakage magnetic flux generated from the magnetic flux leakage path 12 Information stored in the RFID tag 1a can be extracted by transmitting and receiving an AC magnetic field, which is a power transmission medium and an information communication medium, between the RFID tag 1a and an external read / write terminal 9 or the like.
[0109]
Therefore, in various articles having the same form as these which can be opened by opening one side, such as a notebook computer, a portable information terminal (mobile personal computer), a mobile phone, etc., whose exterior is made of a metal case, Product management can be performed by arranging the RFID tag 1a between and extracting information stored in the RFID tag 1a.
[0110]
Therefore, even when re-inspecting a packaged product, information stored in the RFID tag a can be taken out from the outside of the packaging material, and workability is good because there is no need to unpack the packaging material once packaged. .
[0111]
next, As a reference example The housing structure and installation structure of the RFID tag 1b having the concentric disk-shaped antenna coil 2b will be described with reference to FIGS. In addition, about the structure similar to the RFID tag 1a which has the said cylindrical antenna coil 2a, the same code | symbol is attached | subjected and description is abbreviate | omitted.
[0112]
FIG. 15 shows a state in which an RFID tag having a concentric disk-shaped antenna coil housed and disposed in an opening of a container body made of a conductive material is covered with a lid having a convex part inserted into the opening. FIG. 16 is a cross-sectional explanatory view showing a state in which the lid body of FIG. 15 is fixed to the container body by the fixing means.
[0113]
FIG. 17 is a front and side explanatory view showing a configuration of an RFID tag having a concentric disk-shaped antenna coil, and FIG. 18 is a schematic diagram showing a state of a magnetic field generated in the RFID tag having a concentric disk-shaped antenna coil. .
[0114]
FIG. 19 is a cross-sectional explanatory view showing a state in which the RFID tag accommodated in the opening of the container body is covered with a flat plate-shaped lid, and FIG. 20 is a container body having a circular cross section made of a conductive material. FIG. 3 is an exploded explanatory view showing a state in which an RFID tag accommodated in the opening of the sheet is covered with a plate-like lid body in which an accommodating portion for accommodating a part of the RFID tag is formed.
[0115]
FIG. 21 is an explanatory cross-sectional view showing a state in which the RFID tag accommodated in the opening of the container main body made of a conductive material is covered with a lid formed with a storage portion for storing a part of the RFID tag. It is.
[0116]
FIG. 22 is a cross-sectional view showing a state in which the coil surface direction of an RFID tag having a concentric disk-shaped antenna coil at the opening of a container body made of a conductive material is disposed and accommodated in a direction perpendicular to the opening surface. FIG. 23 is an exploded explanatory view showing an example when various slits are formed in a plate-like lid.
[0117]
The RFID tag 1b shown in FIG. 15 to FIG. 23 is also formed integrally with a concentric disk-shaped antenna coil 2b and a semiconductor IC chip 4 as a control unit directly connected without a printed circuit board or the like. Thus, the RFID tag 1b can be downsized. The configuration of the control system of the RFID tag 1b is the same as that described above with reference to FIG.
[0118]
In the RFID tag 1b shown in FIG. 17, the antenna coil 2b, the semiconductor IC chip 4 and the like, which are formed by winding a single wire to form multiple layers in the radial direction and concentrically forming a disk, are integrally sealed with a resin 31. It is stopped and the whole is configured in a disk shape.
[0119]
The RFID tag 1b has an outer diameter D in the radial direction of the antenna coil 2b. ₄ Outer diameter D according to ₃ It is sealed with a resin 31 having
[0120]
less than Reference example The outer diameter D of the resin 31 of the RFID tag 1b employed in FIG. ₃ , And the outer diameter D of the antenna coil 2b ₄ And the inner diameter D of the antenna coil 2b ₅ An example is shown.
[0121]
[Table 2]

[0122]
The thickness T of the resin 31 of the RFID tag 1b is about 0.7 mm to 12.0 mm, and the weight of the RFID tag 1b is about 0.7 g to 5.2 g.
[0123]
As an example of the antenna coil 2b, a copper wire having a diameter of about 30 μm is wound in a concentric disk shape with multiple layers in the radial direction by single wire winding, and the inductance of the antenna coil 2b is about 9.5 mH (frequency 125 kHz). The capacitance of the capacitor separately connected to the antenna coil 2b for resonance was about 170 pF (frequency 125 kHz).
[0124]
FIG. 18 shows a state of the magnetic field H generated from the RFID tag 1b in a free state.
[0125]
On the other hand, an opening 7 having a circular cross section corresponding to the size of the RFID tag 1 b is formed in the container body 5, and the RFID tag 1 b has its antenna coil surface on a bottom surface 7 a serving as an installation surface of the container body 5. A magnetic flux leakage path 12 is formed between the container body 5 and the lid 11 made of a conductive material such as metal.
[0126]
15 and 16, a cylindrical fitting portion 11a having a shape corresponding to the shape of the opening 7 protrudes toward the opening 7 at the center, and the fitting 11a is opened to the opening. The screw 10 is fixed by being screwed into the tap hole 5a provided in the container body 5 through the through hole 11c formed in the flange portion 11b of the lid 11. As a result, the lid 11 is fixed to the container body 5. The container body 5 may be fixed using a tapping screw as the screw 10 without providing the tap hole 5a.
[0127]
Note that the RFID tag 1b may be sealed in a glass container instead of the resin 31. Further, the RFID tag 1b may be sealed with a flexible synthetic resin or the like so that the main body of the RFID tag 1b also serves as a buffer material.
[0128]
FIG. 16 also shows the state of the magnetic field H generated from the RFID tag 1b accommodated in the opening 7 of the container body 5.
[0129]
FIG. 19 shows an example in which the lid body 11 is made of a flat plate, and the lid body 11 is brought into direct contact with the container body 5 and fixed by screws 10 as fixing means. As in the above embodiments, a spacer 13 may be interposed between the container body 5 and the lid 11 or may be fixed with an adhesive 14.
[0130]
20 and 21, a cylindrical shape projecting upward on the opposite side of the opening 7 corresponding to the opening 7 of the container body 5 at the center of the lid 11 made of a conductive material such as metal. A box part 11d is provided, and a storage part 15 having a circular cross section facing the opening 7 is formed inside the box part 11d. Reference example Then, a part of the RFID tag 1b is stored in the storage unit 15.
[0131]
The RFID tag 1b is stored in the opening 7 of the container body 5 and the storage part 15 of the lid 11, and the storage part 15 of the lid 11 is opposed to the opening 7 of the container body 5. The lid 11 is fixed to the container body 5 with bolts and nuts 17 serving as fixing means, and the RFID tag 1b is accommodated and covered. Reference numeral 5b denotes a through hole through which a bolt is inserted.
[0132]
As described above, a spacer 13 made of a non-conductive material may be interposed between the lid 11 and the container body 5 or the lid 11 may be bonded to the container body 5 with an adhesive 14.
[0133]
Further, by protecting the RFID tag 1a by interposing a cushioning material or a heat insulating material in the opening 7 of the container body 5 or the storage part 15 of the lid 11, the maintenance of the RFID tag 1b can be more effectively secured and the temperature can be increased. As a result, the performance of the RFID tag 1b can be stabilized.
[0134]
22 (a) and 22 (b), the coil of the concentric disk-shaped antenna coil 2b with respect to the magnetic flux leakage path 12 formed of the joint surface which is a split surface between the container body 5 having the opening 7 and the lid body 11, respectively. It is arranged and accommodated so that the plane directions are orthogonal.
[0135]
22 (a) shows an example in which a spacer 13 is interposed between the container body 5 and the lid 11, and in FIG. 22 (b), the container body 5 and the lid 11 are brought into direct contact with each other. Although it is an example, you may fix with the adhesive agent 14 similarly to the above-mentioned.
[0136]
FIG. 23A shows a radial shape from a portion corresponding to the center of the antenna coil 2b in a direction that coincides with the radial direction of the RFID tag 1b having the antenna coil 2b formed concentrically through the disc-shaped lid 11. The outer diameter D of the antenna coil 2b ₄ A slit 11e having a length corresponding to is provided as a magnetic flux leakage path. The slit 11e can be closed with an adhesive or filler made of a non-conductive material.
[0137]
FIG. 23B shows a case where only one slit 11e is provided as a magnetic flux leakage path in the radial direction of the antenna coil 2b. The slit 11e can be closed with an adhesive or filler made of a non-conductive material.
[0138]
The leakage magnetic flux generated from the RFID tag 1b having the concentric disk-shaped antenna coil 2b applies a magnetic field H to the upper portion of the bottom surface 7a serving as the installation surface of the container main body 5 through the magnetic flux leakage path 12 and the slit 11e serving as the magnetic flux leakage path. The AC magnetic field, which is a power transmission medium and an information communication medium, can be transmitted to and received from the external read / write terminal 9 or the like.
[0139]
In addition to fixing the lid 11 to the container body 5 by screwing or adhesive bonding, the lid 11 has a magnetic flux leakage path by fitting, caulking, screw fitting, seam, and adhesive bonding. It may be fixed so that an amount of magnetic flux that can be transmitted and received at a practical level can be leaked. Seam bonding is a bonding between metal plates with high-density polyethylene or the like wound together at a bonding site.
[0140]
【The invention's effect】
Since the present invention has the above-described configuration and operation, even when an RFID tag is accommodated in a container made of a conductive material such as a metal having a high mechanical strength, a read / write terminal etc. RFID tags can communicate.
[0141]
That is, the magnetic flux emitted from the RFID tag is affected by a container made of a conductive material, but a part of the magnetic flux leaks to the outside through the magnetic flux leakage path. Communicate with etc.
[0142]
A part of the magnetic flux constituting the electromagnetic wave from the read / write terminal or the like enters the container through the magnetic flux leakage path and is detected by the antenna coil of the RFID tag.
[0143]
Therefore, according to the housing structure, the RFID tag uses the leakage magnetic flux that passes through the magnetic flux leakage path formed in the container even when it is protected by the container made of a conductive material having a high mechanical strength. Communication can be performed between the tag and the outside of the container.
[0144]
Further, the container can be constituted by a plurality of divided bodies, and a magnetic flux leakage path can be formed on at least one of the divided surface or the divided body itself. In this case, maintenance of the RFID tag accommodated in the container is possible. Inspection and replacement can be easily performed.
[0145]
Moreover, the division body which comprises a container can be comprised with the container main body which has an opening part, and the cover body which covers the opening part, and this cover body can be fixed to a container main body with a fixing means. In this case, the magnetic flux leakage path can be easily formed on the dividing surface, and the RFID tag can be easily placed in the container.
[0146]
In addition, when the lid is fixed to the container body by a fixing means via a spacer made of a non-conductive material, a magnetic flux leakage path of any size can be easily formed.
[0147]
In addition, in any of the above RFID tag housing structures, when a cushioning material or a heat insulating material made of a non-conductive material is provided in contact with the RFID tag, the RFID tag becomes effective from an external impact or a sudden change in external temperature. Can be protected.
[0148]
In addition, when the divided bodies are connected to each other by the opening / closing means, communication between the RFID tag in the container and the external read / write terminal etc. is possible even when the container to be used is always open and closed. Can be done.
[0149]
In any of the above RFID tag housing structures, the antenna coil is Formed into a cylinder As a result, the RFID tag housing structure according to the present invention can be configured by an easily available RFID tag.
[0150]
Moreover, according to the RFID tag installation structure of the present invention, the conductive member can be easily managed by the RFID tag.
[0151]
In particular, an RFID tag having a cylindrical antenna coil and formed in a rod shape can be extremely miniaturized, so that it can be easily installed even when the installation area allowed for the conductive member is small.
[Brief description of the drawings]
FIG. 1 is a view showing a state in which an RFID tag accommodated in a container made of a conductive material by an RFID tag accommodation structure according to the present invention is attached to a gas cylinder as a conductive member and used.
FIG. 2 shows a state in which an RFID tag accommodated and arranged in an opening of a container body having a rectangular cross section made of a conductive material is covered with a plate-like lid having a convex part inserted into the opening. FIG.
3 is an explanatory cross-sectional view showing a state in which the plate-like lid body of FIG. 2 is fixed to the container body by various fixing means.
FIG. 4 is a front explanatory view showing a configuration of an RFID tag having a cylindrical antenna coil.
FIG. 5 is a block diagram illustrating a configuration of an RFID tag control system.
FIG. 6 is a schematic diagram showing a state of a magnetic field generated in an RFID tag having a cylindrical antenna coil.
FIG. 7 shows a state in which an RFID tag accommodated in an opening of a container body having a circular cross section made of a conductive material is covered with a plate-like lid having a convex part inserted into the opening. FIG.
FIG. 8 is an explanatory cross-sectional view showing a state where an RFID tag accommodated in an opening of a container body made of a conductive material is covered with a flat plate-shaped lid.
FIG. 9 covers an RFID tag accommodated in an opening of a container body having a rectangular cross section made of a conductive material, with a plate-like lid formed with an accommodating portion for accommodating a part of the RFID tag. It is decomposition | disassembly explanatory drawing which shows a mode.
FIG. 10 is a cross-sectional view showing a state in which an RFID tag accommodated in an opening of a container body made of a conductive material is covered with a plate-like lid body in which an accommodating portion for accommodating a part of the RFID tag is formed. It is explanatory drawing.
FIG. 11 is an explanatory cross-sectional view showing a state in which the axial direction of the cylindrical RFID tag is arranged and accommodated in the opening of the container body made of a conductive material in a direction perpendicular to the opening surface.
FIG. 12 is an exploded explanatory view showing an example when a linear slit is formed in a plate-like lid.
FIG. 13 is a perspective explanatory view showing an example of a case where the RFID tag housing structure according to the present invention is applied to a notebook personal computer.
FIGS. 14A and 14B are a plane explanatory view and a side explanatory view showing an example when the RFID tag communication method according to the present invention is applied to a notebook personal computer.
FIG. 15 covers an RFID tag having a concentric disc-shaped antenna coil housed and arranged in an opening of a container body made of a conductive material, with a lid having a convex part partially inserted into the opening. It is decomposition | disassembly explanatory drawing which shows a mode.
16 is an explanatory cross-sectional view showing a state in which the lid body of FIG. 15 is fixed to the container main body by fixing means.
FIG. 17 is a front and side explanatory view showing a configuration of an RFID tag having a concentric disk-shaped antenna coil.
FIG. 18 is a schematic diagram illustrating a state of a magnetic field generated in an RFID tag having a concentric disk-shaped antenna coil.
FIG. 19 is an explanatory cross-sectional view showing a state in which the RFID tag accommodated in the opening of the container body is covered with a flat plate-shaped lid.
FIG. 20 covers an RFID tag accommodated in an opening of a container body having a circular cross-section made of a conductive material, with a plate-like lid that forms an accommodating portion for accommodating a part of the RFID tag. It is decomposition | disassembly explanatory drawing which shows a mode.
FIG. 21 is a cross-sectional explanatory view showing a state in which an RFID tag accommodated in an opening of a container body made of a conductive material is covered with a lid formed with an accommodating portion for accommodating a part of the RFID tag. is there.
FIG. 22 is a cross-sectional view showing a state in which the coil surface direction of an RFID tag having a concentric disc-shaped antenna coil at the opening of a container body made of a conductive material is arranged and accommodated in a direction perpendicular to the opening surface. FIG.
FIG. 23 is an exploded explanatory view showing an example when various slits are formed in a plate-like lid.
[Explanation of symbols]
1a, 1b ... RFID tag
2a, 2b ... Antenna coil
3. Core member
4 ... Semiconductor IC chip
4a ... CPU
4b ... Memory
4c ... transceiver
4d: Capacitor
5 ... Container body
5a ... Tap hole
5b ... through hole
6 ... Glass container
7 ... Opening
7a ... Bottom
7b ... Side
8 ... resin
9. Read / write terminal
10 ... Screw
11 ... lid
11a ... Fitting part
11b ... Buttocks
11c ... through hole
11d ... box
11e ... Slit
12 ... Magnetic flux leakage path
13 ... Spacer
14… Adhesive
15 ... Storage section
16… Gas cylinder
17 ... Bolts and nuts
21… Notebook PC
21a ... Body side
21a1 ... Keyboard
21a2 ... surface
21a3 ... recess
21b ... Lid side
21b1 ... Liquid crystal display
21b2 ... surface
21c ... Hinge member
31 ... resin
A ... Container

Claims (9)

It has a cylinder-shaped antenna coil and a control unit, and the whole is contained in a container made of RFID tag formed in a rod shape with a conductive material, a communication by electromagnetic waves with the RFID tag and the outside of the container to the container An RFID tag is formed by forming a magnetic flux leakage path composed of a gap formed by a dividing surface for performing the process , and the magnetic flux leakage path extends from the vicinity of the tip of the RFID tag accommodated in the container to the outside of the container . Containment structure. 2. The RFID tag accommodation structure according to claim 1, wherein the container is constituted by a plurality of division bodies that can be divided, and a magnetic flux leakage path is formed on the division surface . The RFID tag housing structure according to claim 2, wherein an axial direction of the RFID tag and the dividing surface are arranged in parallel .   The division body which comprises the said container consists of the container main body which has an opening part, and the cover body which covers the opening part, and this cover body was fixed to the said container main body by the fixing means. RFID tag housing structure. 5. The RFID tag housing structure according to claim 4 , wherein the lid is fixed to the container body by the fixing means via a spacer made of a non-conductive material. 6. The RFID tag housing structure according to claim 1 , further comprising a buffer material or a heat insulating material made of a non-conductive material in contact with the RFID tag.   The RFID tag housing structure according to claim 2, wherein the divided bodies are connected to each other by an opening / closing means so as to be opened and closed. An RFID tag installation structure, wherein the RFID tag housing structure according to claim 1 is installed on an installation surface of a conductive member. 9. The RFID tag installation structure according to claim 8, wherein an axial direction of the RFID tag and the dividing surface are arranged in parallel .

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