JPH02116779A - Moving object identifier - Google Patents
Moving object identifierInfo
- Publication number
- JPH02116779A JPH02116779A JP27000488A JP27000488A JPH02116779A JP H02116779 A JPH02116779 A JP H02116779A JP 27000488 A JP27000488 A JP 27000488A JP 27000488 A JP27000488 A JP 27000488A JP H02116779 A JPH02116779 A JP H02116779A
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- Prior art keywords
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- signal
- station
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- receiving section
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- 230000005674 electromagnetic induction Effects 0.000 claims abstract description 29
- 230000004044 response Effects 0.000 claims abstract description 9
- 238000012790 confirmation Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 14
- 238000010586 diagram Methods 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 6
- 230000003321 amplification Effects 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 1
- 230000005279 excitation period Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
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Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、高周波を用いる移動体識別装置に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mobile object identification device using high frequency.
（従来の技術〕
ステイション（質問器）とタグ（応答器）からなる移動
体識別装置の一般的構成図を第６図に示す。(Prior Art) FIG. 6 shows a general configuration diagram of a mobile object identification device consisting of a station (interrogator) and a tag (responder).
Ａはステイション側回路構成を示し、１はＣＰＵ等のロ
ジック回路で構成された、データ送出・処理回路、２は
搬送信号の発振器、３は変復調および受信信号の増幅等
を行なう信号処理回路、４は高周波用アンテナからなる
送受信部、５は記憶回路である。Ｂはタグ側回路構成を
示し、６はＣＰＵ等のロジック回路で構成された、デー
タ送出・処理回路、７は変復調および受信信号の増幅等
を行なう信号処理回路、８は送受信部、９は識別情報及
び固有のデータを記憶する記憶回路をそれぞれ示す。A shows the station side circuit configuration, 1 is a data sending/processing circuit composed of logic circuits such as a CPU, 2 is a carrier signal oscillator, 3 is a signal processing circuit that performs modulation/demodulation and amplification of received signals, etc. 4 is a transmitter/receiver section consisting of a high frequency antenna, and 5 is a storage circuit. B shows the circuit configuration on the tag side, 6 is a data sending/processing circuit composed of logic circuits such as a CPU, 7 is a signal processing circuit that performs modulation/demodulation and amplification of received signals, 8 is a transmitting/receiving section, and 9 is an identification unit. A storage circuit for storing information and unique data is shown, respectively.
データ送出・処理回路１から送出されたシリアルデータ
は、信号処理回路３に入力され、発振器２で生成した空
間伝送用の搬送波で変調され、送受信部４から送信され
る。タグＢ側では、送受信部４から送信された送信信号
を受信し、信号処理回路７を通して元のシリアルデータ
に復調する。Serial data sent from the data sending/processing circuit 1 is input to the signal processing circuit 3, modulated with a carrier wave for spatial transmission generated by the oscillator 2, and sent from the transmitting/receiving section 4. On the tag B side, the transmission signal transmitted from the transceiver section 4 is received and demodulated into the original serial data through the signal processing circuit 7.
タグＢから返信を行なうときは、データ送出・処理回路
６から送出されたシリアルデータ信号を信号処理回路７
で変調し、送信部８から送出する。When sending a reply from tag B, the serial data signal sent from the data sending/processing circuit 6 is sent to the signal processing circuit 7.
The signal is modulated by the transmitter 8 and sent out from the transmitter 8.
タグＢが搬送波の発振器をもつ場合は、その発信信号で
変調するが、発振器を持たない場合はステイションＡか
ら送出される無変調信号を反射する等の方法を用いる。If tag B has a carrier wave oscillator, it modulates it with the transmitted signal, but if it does not have an oscillator, a method such as reflecting an unmodulated signal sent from station A is used.
ステイションＡでは、タグＢからの返信信号を受信部４
で受信し、信号処理回路３でシリアルデータに復調し、
データ送出・処理回路１に与える。しかし、今、第７図
のように、タグＢとステイションＡが交信中に別のタグ
Ｃがステイションへの検知エリア１２に侵入してきた場
合、タグＢとステイションＡの交信波にタグＣが応答し
て、混信してしまう可能性がある。At station A, the reply signal from tag B is sent to receiver 4.
and demodulated into serial data by the signal processing circuit 3.
It is applied to the data sending/processing circuit 1. However, as shown in FIG. 7, if another tag C enters the detection area 12 of the station while tag B and station A are communicating, the tag C will be detected by the communication waves between tag B and station A. There is a possibility that C will respond and cause interference.
このような混信を防ぐため、従来、第８図のように、タ
グＢとステイションＡの両方に、異なる搬送周波数（Ｆ
ｌ、Ｆ２）を存する交信手段を二つずつ設置し、一方の
交信手段（ステイション側発振器２１、ステイション側
信号処理回路３１、ステイション送受信部４１、タグ側
送受信部８１、タグ側信号処理回路７１、周波数Ｆｌ）
で識別情報の交信を行い、もう一方の交信手段（ステイ
ション側発振器２２、ステイション側信号処理回路３２
、ステイション送受信部４２、タグ側送受信部８２、タ
グ側信号処理回路７２、周波数Ｆ２）でデータの交信を
行うものがあった（特開昭６３−１３３７９８号）。In order to prevent such interference, conventionally, tag B and station A have different carrier frequencies (F), as shown in Figure 8.
1, F2) are installed, and one communication means (station side oscillator 21, station side signal processing circuit 31, station transmitting/receiving section 41, tag side transmitting/receiving section 81, tag side signal processing Circuit 71, frequency Fl)
The communication means (station side oscillator 22, station side signal processing circuit 32) communicates identification information.
, station transmitter/receiver 42, tag side transmitter/receiver 82, tag side signal processing circuit 72, and frequency F2) (Japanese Patent Laid-Open No. 133798/1983).
即ち、第９図（ａ）のように、ステイションＡとその検
知エリア１２に侵入したタグＢとの間で、周波数Ｆ１を
用いて識別情報（識別番号）の交信（交信開始要求信号
送信ａ、肯定信号返信ｂ、識別情報要求信号送信Ｃ，識
別情報返信ｄ、交信終了信号送信ｅ）を行い、ステイシ
ョンＡでは第９図（ｂ）のように、識別情報を記憶回路
５内に順に保持していく。ステイションＡでは、タグＢ
との識別情報の交信がおわれば、さらに、新しいタグの
侵入を検知するため交信開始要求信号ａを送出・する。That is, as shown in FIG. 9(a), between station A and tag B that has entered its detection area 12, communication of identification information (identification number) is performed using frequency F1 (transmission of communication start request signal a). , an affirmative signal reply b, an identification information request signal sent C, an identification information reply d, and a communication end signal sent e), and at station A, the identification information is sequentially stored in the storage circuit 5 as shown in FIG. 9(b). I will keep it. At station A, tag B
After the communication of identification information with the tag is completed, a communication start request signal a is sent to detect the intrusion of a new tag.
その後のデータの交信は、第９図（Ｃ）に示すように、
周波数Ｆ２を用い、記憶回路５内に保持されているもの
順に、交信対象タグのみ（図では最初に記憶されている
識別番号０１のタグ）とデータの交信（交信開始要求信
号送信ａ。The subsequent data communication is as shown in FIG. 9(C).
Using frequency F2, data is communicated with only the communication target tags (in the figure, the tag with identification number 01 stored first) in the order of those stored in the storage circuit 5 (transmission of communication start request signal a).
、肯定信号返信ｂｌ、質問信号送信ｆ、データ返信信号
返信ｇ、交信終了信号送信ｅ ｌ ）を行う。, an affirmative signal reply bl, a question signal transmission f, a data reply signal reply g, and a communication end signal transmission e l ).
そして、最初のタグとの交信が終われば、次の順番の識
別情報を持つタグ（図では識別番号０２のタグ）との交
信を開始する。When communication with the first tag is completed, communication with a tag having identification information in the next order (in the figure, the tag with identification number 02) is started.
ここで、周波数Ｆ２のタグによる交信の優先順位につい
ては、あらかじめ設定しておき、その順番に行うことも
できる。Here, the priority order of communication using the tag of frequency F2 can be set in advance and the communication can be performed in that order.
このような交信手順をふむことにより、データの交信に
関しては、特定のタグのみと交信を行うことが可能なた
め、データの混信は起こらない。By following such a communication procedure, data communication can be performed only with a specific tag, so that data interference does not occur.
しかし、上記従来例にあっては、タグＢとステイシゴン
Ａとの識別情報交信中に別のタグＣが侵入した場合、デ
ータの混信を起こすという問題点があった。また、タグ
とステイションの各々に２系統の交信手段を有すること
となり、装置が大型になるという問題点があった。However, in the above-mentioned conventional example, if another tag C intrudes during identification information communication between tag B and stacygon A, there is a problem that data interference occurs. Furthermore, the tag and the station each have two communication systems, which causes the problem that the device becomes large.
本発明は、上記の点に鑑みてなしたものであり、その目
的とするところは、検知エリア内に複数のタグが存在し
ても混信することがなく、かつ小型化の図れる移動体識
別装置を提供することにある。The present invention has been made in view of the above points, and its purpose is to provide a mobile object identification device that does not cause interference even when a plurality of tags are present in a detection area and can be miniaturized. Our goal is to provide the following.
本発明は、移動体に取り付けられ、ステイションからの
交信開始要求信号に応じて、肯定応答信号を送出し、ス
テイションからの識別情報要求信号に応じて識別情報を
返信するタグと、タグに対して交信開始要求信号を送出
し、この交信開始要求信号に対するタグからの応答信号
を受信して、タグを識別するための識別情報要求信号を
送出するステイシジンとからなり、ステイションとタグ
間のデータの送受信を高周波用送受信部により行うよう
にし、タグとステイションの各々に共振周波数の略等し
い電磁誘導用送受信部を付加し、ステイションはタグか
らの肯定応答信号を受信したときに自己の電磁誘導用送
信部を励起し、タグでは、ステイションからの交信開始
要求信号を受信したときに自己の電磁誘導用受信部が共
振していない場合にのみ肯定応答信号を返信するように
したことを特徴とするものである。The present invention provides a tag that is attached to a mobile object, that sends out an acknowledgment signal in response to a communication start request signal from a station, and that sends back identification information in response to an identification information request signal from the station; The station and the tag transmit a communication start request signal to the station, receive a response signal from the tag in response to the communication start request signal, and send an identification information request signal for identifying the tag. Transmission and reception of data is performed by a high-frequency transmitter/receiver, and an electromagnetic induction transmitter/receiver with approximately the same resonance frequency is added to each of the tag and station, and the station receives an acknowledgment signal from the tag. The electromagnetic induction transmitter is excited, and the tag returns an acknowledgment signal only if its own electromagnetic induction receiver is not resonating when it receives a communication start request signal from the station. It is characterized by:
本発明の移動体識別装置では、ステイションはタグから
の肯定応答信号を受信すると自己の電磁誘導用送信部を
励起し、タグに設置された電磁誘導用受信部を共振させ
るとともに、識別情報要求信号を送信する。タグが検知
エリアに入ると、ステイションからの交信開始要求信号
を受信して肯定応答信号を返信するのであるが、自己の
！磁誘導用受信部が共振している場合には、肯定応答信
号の返信を行わない。即ち、ステイションが１つのタグ
と交信中に別のタグが検知エリアに入ってきた場合は、
ステイションの電磁誘導用送信部は励起されているので
、後から入ってきたタグの電磁誘導用受信部はすでに共
振しているので、後からのタグは、ステイションからの
交信開始要求信号を受信しても肯定応答信号を返信する
ことはないのである。従って、後からのタグの信号によ
り、ステイションと前のタグとの交信が混信してしまう
ことがないのである。In the mobile object identification device of the present invention, when the station receives an acknowledgment signal from the tag, it excites its own electromagnetic induction transmitter, causes the electromagnetic induction receiver installed in the tag to resonate, and requests identification information. Send a signal. When the tag enters the detection area, it receives a communication start request signal from the station and sends back an acknowledgment signal, but its own! If the magnetic induction receiving section is resonating, no acknowledgment signal is returned. That is, if the station is communicating with one tag and another tag enters the detection area,
Since the electromagnetic induction transmitter of the station is excited, the electromagnetic induction receiver of the tag that comes in later is already resonating, so the tag that comes later will not receive the communication start request signal from the station. Even if it is received, it does not send back an acknowledgment signal. Therefore, signals from later tags do not interfere with communication between the station and the previous tag.
以下、本発明の実施例を一実施例として掲げた図面に基
づき説明する。Embodiments of the present invention will be described below based on drawings shown as examples.
Ａはステイション側のブロック図であり、以下の構成か
らなる。１はデータ送出・処理回路で、ＣＰＵ等のロジ
ック回路で構成され、シリアルデータを送出する。２は
発振器で、空間伝送用の搬送信号を生成する。３は信号
処理回路で、変復調および受信信号の増幅等を行う、４
は高周波用送受信部で、例えばマイクロ波等を送受信す
る平面アンテナ等により構成される。５は記憶回路で、
後述のタグＢからの識別情報が正当であるか否かも判断
するためのデータ等が記憶されている。A is a block diagram of the station side, which has the following configuration. Reference numeral 1 denotes a data sending/processing circuit, which is composed of a logic circuit such as a CPU, and sends out serial data. 2 is an oscillator that generates a carrier signal for spatial transmission. 3 is a signal processing circuit that performs modulation/demodulation and amplification of the received signal, etc.;
is a high frequency transmitting/receiving section, which is composed of, for example, a flat antenna for transmitting and receiving microwaves and the like. 5 is a memory circuit,
Also stored is data for determining whether identification information from tag B, which will be described later, is valid.
１３は電磁誘導用送信部で、Ｌ、Ｃによる電磁誘導回路
で構成され、信号処理回路３からの信号により、励起さ
れたり励起を止められたりする。Reference numeral 13 denotes an electromagnetic induction transmitter, which is composed of an electromagnetic induction circuit formed by L and C, and is excited or de-energized by a signal from the signal processing circuit 3.
Ｂはタグ側のブロック図であり、以下の構成からなる。B is a block diagram of the tag side, which has the following configuration.
６はデータ送出・処理回路で、ＣＰＵ等のロジック回路
で構成され、シリアルデータを送出する。７は信号処理
回路で、変復調および受信信号の増幅等を行う。８は高
周波用送受信部で、例えばマイクロ波等を送受信する平
面アンテナ等により構成される。９は記憶回路で、タグ
Ｂ自己の識別情報が記憶されている。6 is a data sending/processing circuit, which is composed of a logic circuit such as a CPU, and sends out serial data. A signal processing circuit 7 performs modulation/demodulation and amplification of received signals. Reference numeral 8 denotes a high frequency transmitting/receiving section, which is composed of, for example, a planar antenna for transmitting and receiving microwaves and the like. Reference numeral 9 denotes a storage circuit in which identification information of the tag B itself is stored.
１４は電磁誘導用受信部で、Ｌ、Ｃによる電磁誘導回路
で構成されており、ステイションへの電磁誘導用送受信
部１３が励起されると、共振するようになっている。Reference numeral 14 denotes an electromagnetic induction receiving section, which is composed of an electromagnetic induction circuit made up of L and C, and resonates when the electromagnetic induction transmitting/receiving section 13 to the station is excited.
次に、本実施例の動作を第３図および第４図のフローチ
ャートを用いて説明する。Next, the operation of this embodiment will be explained using the flowcharts of FIGS. 3 and 4.
今、第５図の状態を想定する。つまり、ステイションＡ
の検知エリア１２内にタグが存在していない状態の時に
タグＢが入ってきた場合、第２図に示すように、ステイ
ションＡより交信開始要求信号ａが高周波用送受信部４
から送信される。タグＢは高周波用送受信部８で前記交
信開始要求信号ａを受信し、肯定信号すを高周波用送受
信部８から返信する。Now, assume the situation shown in Figure 5. In other words, station A
If tag B enters when no tag is present in the detection area 12 of station A, as shown in FIG.
Sent from. The tag B receives the communication start request signal a at the high frequency transmitting/receiving section 8, and returns an affirmative signal from the high frequency transmitting/receiving section 8.
ステイションＡは、高周波用送受信部４で肯定信号すを
受信すると、電磁誘導用送信部１３を励起させるととも
に、高周波用送受信部４から識別情報要求信号Ｃを送信
する。タグＢは、高周波用送受信部８で識別情報要求信
号Ｃを受信すると、高周波用送受信部８から識別情報信
号ｄを返信する。ステイションＡでは高周波用送受信部
４で識別情報信号ｄを受信し、ＣＰＵＩで記憶回路５の
内容と比較して、タグＢからの識別情報が正当なものか
否かを判断する。もし正当であれば、タグＢの記憶回路
９内のデータを要求するか、交信を終了するかの判断を
する。When the station A receives the affirmative signal S at the high-frequency transmitting/receiving section 4, it excites the electromagnetic induction transmitting section 13 and transmits the identification information request signal C from the high-frequency transmitting/receiving section 4. When the tag B receives the identification information request signal C at the high frequency transmitting/receiving section 8, the tag B returns an identification information signal d from the high frequency transmitting/receiving section 8. At station A, the high frequency transmitter/receiver 4 receives the identification information signal d, and the CPU compares it with the contents of the storage circuit 5 to determine whether the identification information from the tag B is valid. If it is valid, it is determined whether to request the data in the storage circuit 9 of tag B or to terminate the communication.
交信を終了する場合は、励起期間ｔだけ励起していた電
磁誘導用送信部１３の励起を終了させ、交信終了信号ｅ
を高周波用送受信部４から送信する。When terminating the communication, the excitation of the electromagnetic induction transmitter 13 that has been excited for the excitation period t is terminated, and the communication termination signal e is emitted.
is transmitted from the high frequency transmitting/receiving section 4.
ここで、ステイションＡがタグＢと交信中に別のタグＣ
が検知エリアに入ってきたとする。ステイションＡの電
磁誘導用送信部１３は励起されているので、タグＣの電
磁誘導用受信部１４は共振している。タグＣは、ステイ
ションＡからの交信開始要求信号ａを受信したとき、電
磁誘導用受信部１４の共振状態をみて、共振していない
ときのみ肯定信号すを高周波用送受信部８から返信する
ようになっている。従って、今の場合は電磁誘導用受信
部１４が共振しているので、タグＢは肯定信号すは返信
しないのである。Here, while station A is communicating with tag B, another tag C
Suppose that the object enters the detection area. Since the electromagnetic induction transmitting section 13 of the station A is excited, the electromagnetic induction receiving section 14 of the tag C is resonating. When the tag C receives the communication start request signal a from the station A, the tag C checks the resonance state of the electromagnetic induction receiving section 14 and returns an affirmative signal from the high frequency transmitting/receiving section 8 only when there is no resonance. It has become. Therefore, in this case, since the electromagnetic induction receiving section 14 is resonating, tag B does not return an affirmative signal.
従って、ステイションＡとタグＢの交信中に別のタグＣ
からの信号が入って、混信してしまうことはないのであ
る。Therefore, while station A and tag B are communicating, another tag C
There is no possibility that signals from other sources will enter and cause interference.
また、タグＣが検知エリア１２外にある場合でも、周囲
環境等からの反射によりステイションＡと交信する可能
性があるが、第５図のように、電磁誘導用送信部１３の
検知エリア１５を、高周波用送受信部４の検知エリア１
２より広くしておけば、タグＣとステイションＡとの交
信を防ぐことができる。Furthermore, even if the tag C is outside the detection area 12, there is a possibility that it will communicate with the station A due to reflection from the surrounding environment, but as shown in FIG. , the detection area 1 of the high frequency transmitter/receiver 4
If it is made wider than 2, communication between tag C and station A can be prevented.
従って、本実施例によれば、ステイションＡの電磁誘導
用送信部１３が励起されている間は、他のタグにより妨
害されることはない。Therefore, according to this embodiment, while the electromagnetic induction transmitter 13 of station A is excited, it will not be disturbed by other tags.
以上のように、本発明によれば、ステイションとタグの
各々に電磁誘導用送受信部を設置し、ステイションとタ
グが交信時は、電磁誘導用送受信部が励起されるように
し、励起している間は、他のタグとは交信しないように
なっているので、検知エリア内に複数のタグが存在して
も交信することがなく、かつ小型化の図れる移動体識別
装置が提供できた。As described above, according to the present invention, an electromagnetic induction transmitting/receiving section is installed in each of the station and the tag, and when the station and the tag communicate, the electromagnetic induction transmitting/receiving section is excited. Since the tag does not communicate with other tags while the detection area is being detected, it does not communicate with other tags even if there are multiple tags within the detection area, and we have been able to provide a mobile object identification device that can be miniaturized. .
第１図は、本発明の一実施例を示すブロック図、第２図
は、同上の動作説明図、
第３図は、同上の動作説明のためのステイションのフロ
ーチャート
第４図は、同上の動作説明のためのタグのフローチャー
ト、
第５図は、同上の動作説明のための検知エリアを示す模
式図、
第６図は、従来例を示すブロック図、
第７図は、同上の動作説明のための検知エリアを示す模
式図、
第８図は、他の従来例を示すブロック図、第９図は、同
上の動作説明図である。
Ａ−ステイション
Ｂ、、Ｃ・・−タグ
１．６・−ｃｐｕ
２・−・発振器
３．７−・−信号処理回路
４．８・−・高周波用送受信部
５．９−・−記憶回路
工３−電磁誘導用送信部
１４−電磁誘導用受信部
第１図
１１２図
Ｃ二＝＝コ
第４図
第５
図
第８
第９
手
続
ネ甫
正
書
１．１Ｈ牛の耘
１３不口６３年
許
２７０００４号
２、発明の名称
１Ａ塀材馴１諧置
３、補正をする者
事件との関係FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is an explanatory diagram of the same operation as above, FIG. 3 is a flowchart of the station for explaining the operation of the same as above, FIG. A flowchart of the tag for explaining the operation. FIG. 5 is a schematic diagram showing the detection area for explaining the operation as above. FIG. 6 is a block diagram showing a conventional example. FIG. 7 is a diagram for explaining the operation as above. FIG. 8 is a block diagram showing another conventional example, and FIG. 9 is an explanatory diagram of the same operation. A-station B,,C...-tag 1.6--cpu 2--oscillator 3.7--signal processing circuit 4.8--high frequency transmitting/receiving unit 5.9--storage circuit Engineering 3 - Electromagnetic induction transmitter 14 - Electromagnetic induction receiver Fig. 1 Fig. 112 Fig. C 2 == Co Fig. 4 Fig. 5 Fig. 8 No. 9 Patent No. 270004 2, Title of the invention 1A Fence material 1 Comment 3, Relationship with the person making the amendment case
Claims (1)
開始要求信号に応じて、肯定応答信号を送出し、ステイ
ションからの識別情報要求信号に応じて識別情報を返信
するタグと、タグに対して交信開始要求信号を送出し、
この交信開始要求信号に対するタグからの応答信号を受
信して、タグを識別するための識別情報要求信号を送出
するステイションとからなり、ステイションとタグ間の
データの送受信を高周波用送受信部により行うようにし
た移動体識別装置において、タグとステイションの各々
に共振周波数の略等しい電磁誘導用送受信部を付加し、
ステイションはタグからの肯定応答信号を受信したとき
に自己の電磁誘導用送信部を励起し、タグでは、ステイ
ションからの交信開始要求信号を受信したときに自己の
電磁誘導用受信部が共振していた場合にのみ肯定応答信
号を返信するようにしたことを特徴とする移動体識別装
置。(1) A tag attached to a mobile object that sends out an acknowledgment signal in response to a communication start request signal from the station and returns identification information in response to an identification information request signal from the station; sends a communication start request signal,
It consists of a station that receives a response signal from the tag in response to this communication start request signal and sends out an identification information request signal for identifying the tag, and a high-frequency transmitter/receiver unit transmits and receives data between the station and the tag. In a mobile object identification device designed to perform
When the station receives an acknowledgment signal from the tag, it excites its own electromagnetic induction transmitter, and when the tag receives a communication start request signal from the station, its own electromagnetic induction receiver resonates. A mobile object identification device characterized in that an acknowledgment signal is sent back only when the mobile object identification device has received a confirmation signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27000488A JPH02116779A (en) | 1988-10-26 | 1988-10-26 | Moving object identifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27000488A JPH02116779A (en) | 1988-10-26 | 1988-10-26 | Moving object identifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02116779A true JPH02116779A (en) | 1990-05-01 |
Family
ID=17480213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27000488A Pending JPH02116779A (en) | 1988-10-26 | 1988-10-26 | Moving object identifier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02116779A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04119142U (en) * | 1991-04-02 | 1992-10-26 | オムロン株式会社 | Contactless passgate system |
-
1988
- 1988-10-26 JP JP27000488A patent/JPH02116779A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04119142U (en) * | 1991-04-02 | 1992-10-26 | オムロン株式会社 | Contactless passgate system |
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