JP2011250040A5

JP2011250040A5 -

Info

Publication number: JP2011250040A5
Application number: JP2010119897A
Authority: JP
Filing date: 2010-05-25
Publication date: 2013-06-20
Anticipated expiration: 2030-05-25

Description

〈電界通信用端末〉
電界通信用端末２０についてより詳細に説明する。図３は電界通信用端末２０を示すブロック図である。電界通信用端末２０は、生体Ｐに所持される可搬型の端末であり、電界通信用データ送受信装置３０からの起動信号の受信に応じて個体識別データを含む信号を送信可能に構成されている。より具体的には、電界通信用端末２０は、電極部２２と、共振回路２３と、送信回路２４と、受信回路２５と、端末側制御部２６と、波形整形回路２７と、電源ユニット２８と、スイッチ回路２９等を有している。 <Electric field communication terminal>
The electric field communication terminal 20 will be described in more detail. FIG. 3 is a block diagram showing the electric field communication terminal 20. Field communication end end 2 0 is a terminal of portable to be possessed in vivo P, are transmittable to form a signal containing the identification data in response to the reception of the start signal from the electric field communication data transmitting and receiving device 30 ing. More specifically, the electric field communication terminal 20 includes an electrode unit 22, a resonance circuit 23, a transmission circuit 24, a reception circuit 25, a terminal side control unit 26, a waveform shaping circuit 27, and a power supply unit 28. , A switch circuit 29 and the like.

データ送受信装置３０では、概略的には、送受信ユニット５０が、電界通信用電極３６を介して電界通信用端末２０との間で生体を媒体とした通信を行い、電界通信用端末２０から送信された個体識別データの読み取りを行う。電界通信用データ送受信装置３０は、読み取った個体識別データを外部の制御装置１００へ無線通信部７０を介して無線送信する。制御装置１００は、受信した個体識別データの照合を行い、適合であると判断した場合、上記の各種装置１０２の制御を行う。 In the data transmitting / receiving apparatus 30, schematically, the transmitting / receiving unit 50 performs communication using the living body as a medium with the electric field communication terminal 20 via the electric field communication electrode 36 and is transmitted from the electric field communication terminal 20. Read individual identification data. The electric field communication data transmitting / receiving device 30 wirelessly transmits the read individual identification data to the external control device 100 via the wireless communication unit 70. The control device 100 collates the received individual identification data, and if it is determined to be compatible, controls the various devices 102 described above.

また、椅子２の設置環境において、電界通信の基準電位（アース）として床面を想定した場合（図９（Ａ））、電界通信用データ送受信装置３０の送受信ユニット５０および電源ユニット３２を格納する筐体３００は床面（アース）と空気等を介して静電容量結合を形成する。また、生体Ｐは送受信ユニット５０および電界通信用電極３６と接続されている可撓性電極１０１と静電容量結合し、電界通信用端末２０の電極の片側は人体Ｐと、もう片側は空気等を介して床面(アース)と静電容量結合を形成する。この際形成される閉回路は床面−電界通信用データ送受信装置３０−生体Ｐ−電界通信用端末２０−床面である。この閉回路の簡易的な等価回路は図２の信号源Ａとアースの間にごく微小な容量を持つキャパシタを挿入した形となり、電界通信用データ送受信装置３０と電界通信用端末２０の間の信号が減衰する原因となる。 When the floor is assumed as the reference potential (ground) for electric field communication in the installation environment of the chair 2 (FIG. 9A), the transmission / reception unit 50 and the power supply unit 32 of the electric field communication data transmission / reception device 30 are stored. The casing 300 forms a capacitive coupling through the floor (earth) and air or the like. The biological P transmission and reception units 50 and flexible electrode 101 and the capacitance coupling and which is connected to the electric field communication electrodes 36, and one side of the electrode body P of the electric field communication terminal 20, the other side is air and the like Capacitive coupling is formed with the floor (ground) via Closed circuit this time the formed floor - a field communication data transceiver 30- biological P- field communication terminal 20-floor. The simple equivalent circuit of the closed circuit becomes the shape inserting the capacitor having a very small capacitance between the signal source A and the ground in FIG. 2, between the electric field communication data transmitting and receiving apparatus 30 and the electric field communication terminal 20 It causes the signal to attenuate.

一方、椅子２にアースとして使用できる面積を有する、例えば肘掛部２０１のような金属部品が存在する場合、筐体３００に格納される送受信ユニット５０内に格納される、送信回路２４や受信回路２５等の基板上に実装される電気回路網中のシグナルグランドと肘掛部２０１をワイヤー２０３等で接続することで、図９（Ｂ）に示すような静電容量結合により閉回路が形成される。すなわち、肘掛部２０１と電界通信用データ送受信装置３０−生体Ｐ−電界通信用端末２０−肘掛部２０１と電界通信用データ送受信装置３０という閉回路である。この閉回路の等価回路は図２で示すものとなり、信号源Ａとアースの間にキャパシタ成分が介在しないことから、信号が減衰しにくく、電界通信性能を安定させることができる。 On the other hand, when the chair 2 has a metal part having an area that can be used as a ground, for example, an armrest portion 201, the transmission circuit 24 and the reception circuit 25 stored in the transmission / reception unit 50 stored in the housing 300. By connecting the signal ground in the electric circuit network mounted on the substrate such as the armrest 201 with the wire 203 or the like, a closed circuit is formed by capacitive coupling as shown in FIG. 9B. That is, a closed circuit that armrest portion 201 and the electric field communication data transceiver 30- biological P- field communication terminal 20-armrest portion 201 and the electric field communication data transceiver 30. The equivalent circuit of this closed circuit is as shown in FIG. 2, and since no capacitor component is interposed between the signal source A and the ground, the signal is hardly attenuated and the electric field communication performance can be stabilized.

送信回路５３は、変調回路、増幅回路等を有しており、制御部６０より与えられる信号(例えば、読出要求等を含む信号)を変調、増幅等し、処理後の所定周波数(例えば
、３．２ＭＨｚ)の信号を、スイッチ回路５４を介して電界通信用電極３６に出力する。
これにより、送信回路５３は、電界通信用電極３６および可撓性電極１０１を介して起動信号を出力することになる。 Transmission circuit 53, modulation circuit has an amplifier circuit or the like, control signal supplied from the control unit 60 (e.g., a signal containing a read request, etc.) modulates, equal amplification, a predetermined frequency after treatment (e.g., A signal of 3.2 MHz) is output to the electric field communication electrode 36 via the switch circuit 54.
As a result, the transmission circuit 53 outputs an activation signal via the electric field communication electrode 36 and the flexible electrode 101.

Claims

A data transmission / reception system for electric field communication for performing transmission / reception of individual identification data by performing electric field communication using a user's living body as a medium,
A terminal for electric field communication possessed by the user;
An electric field communication data transmitting / receiving device arranged in a chair and performing electric field communication with the electric field communication terminal possessed by a user seated on the chair;
The electric field communication terminal is:
In response to receiving the identification start signal, a signal including individual identification data is transmitted,
Said field communication data transmitting and receiving apparatus,
A flexible electrode located near the seat surface of the chair and disposed so as to be close to a user seated on the chair;
An electric field communication electrode electrically connected to the flexible electrode;
A transmission circuit for transmitting an identification start signal to the electric field communication terminal via the electric field communication electrode and the flexible electrode;
A receiving circuit for receiving a signal including the individual identification data from the electric field communication terminal via the flexible electrode and the electric field communication electrode;
A data transmission / reception system for electric field communication comprising a control unit for reading and processing the individual identification data.