JPH09212759A - Entrance/exit monitor device - Google Patents
Entrance/exit monitor deviceInfo
- Publication number
- JPH09212759A JPH09212759A JP8034284A JP3428496A JPH09212759A JP H09212759 A JPH09212759 A JP H09212759A JP 8034284 A JP8034284 A JP 8034284A JP 3428496 A JP3428496 A JP 3428496A JP H09212759 A JPH09212759 A JP H09212759A
- Authority
- JP
- Japan
- Prior art keywords
- receiver
- received
- transmitter
- field strength
- electric field
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Geophysics And Detection Of Objects (AREA)
- Time Recorders, Dirve Recorders, Access Control (AREA)
- Burglar Alarm Systems (AREA)
- Alarm Systems (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、電波を利用して
検出区画内に入出する検出対象を監視する入出監視装置
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an entrance / exit monitor for monitoring a detection target entering / exiting a detection section by using radio waves.
【０００２】[0002]
【従来の技術】検出区画内に入出する検出対象を監視す
る入出監視装置には種々の装置が存在するが、例えば図
１に示すような装置がある。図１は、本発明の実施形態
を説明するための図でもあるが、データ処理装置４０の
構成を除いて従来の装置と同様であるので、図１を用い
て従来のこの種の入出監視装置を説明する。図におい
て、１は検出区画、２はその出入口、１０は検出対象
（移動体）、２０は検出対象１０に装着された発信機、
３０ａは検出区画１内の中央付近に設置された受信機、
３０ｂは同じく出入口２付近に設置された受信機、４０
はデータ処理装置、５０は表示器である。なお、説明を
解り易くするために各部の縮尺は必ずしも正確ではな
い。2. Description of the Related Art There are various types of entrance / exit monitoring devices for monitoring a detection target entering / exiting a detection zone. For example, there is a device as shown in FIG. FIG. 1 is also a diagram for explaining the embodiment of the present invention, but since it is the same as the conventional device except for the configuration of the data processing device 40, the conventional entry / exit monitoring device of this type using FIG. Will be explained. In the figure, 1 is a detection section, 2 is its entrance / exit, 10 is a detection target (moving body), 20 is a transmitter attached to the detection target 10,
30a is a receiver installed near the center of the detection section 1,
30b is a receiver installed near the entrance 2 and 40
Is a data processing device, and 50 is a display. It should be noted that the scale of each part is not necessarily accurate for easy understanding.
【０００３】また、検出対象１０は移動して出入口２か
ら検出区画１を出入する移動体であり、図１では一つだ
けを図示しているが、一般的には検出対象１０は複数存
在し、それぞれの検出対象１０にそれぞれ異なったＩＤ
を発信する発信機２０が装着されている。また、発信機
２０と受信機３０とは無線回線で接続されており、受信
機３０ａと３０ｂおよびデータ処理装置４０と表示器５
０とは、データ信号線で接続されている。各受信機３０
は、発信機２０からの無線信号を受信すると、受信電界
強度，受信後にデータ処理装置４０にデータを送信する
までの経過時間（以下、単に経過時間と呼ぶ），当該発
信機２０のＩＤ番号を検出し、これらに自己の受信機の
番号を付したデータをデータ処理装置４０へ信号として
送信する。Further, the detection target 10 is a moving body that moves in and out of the detection section 1 through the entrance / exit 2, and although only one is shown in FIG. 1, generally, there are a plurality of detection targets 10. , A different ID for each detection target 10
A transmitter 20 for transmitting is transmitted. Further, the transmitter 20 and the receiver 30 are connected by a wireless line, and the receivers 30a and 30b, the data processing device 40, and the display 5 are connected.
The data signal line is connected to 0. Each receiver 30
When the wireless signal from the transmitter 20 is received, the received electric field strength, the elapsed time until the data is transmitted to the data processing device 40 after the reception (hereinafter, simply referred to as elapsed time), and the ID number of the transmitter 20 are displayed. The data is detected and the data with their own receiver numbers attached is transmitted to the data processing device 40 as a signal.
【０００４】図３は、従来の入出監視装置に用いられる
処理装置４０の構成を示すブロック図であり、図におい
て、４０１はモデム、４０２は時刻演算回路、４０３は
電界強度比較回路、４０４は表示制御回路である。モデ
ム４０１では送られてきた信号を復調し、受信機３０の
番号，発信機２０のＩＤ番号，経過時間，受信電界強度
をデータとして出力し、時刻演算回路４０２で受信機３
０での受信時刻を算出する。また電界強度比較回路４０
３では受信電界強度が所定レベル以上ある場合に電波を
受信したとする判定、発信機２０からの電波が同時に２
台の受信機３０で受信された場合に受信電界強度の強い
方の受信機の特定、さらに受信電界強度が同じ場合には
出入口２付近に設置した受信機３０ｂから受信したとす
る特定を行う。そしてこれら判定，特定されたデータ
は、表示制御回路４０４へ送られ、表示制御回路４０４
が動作して表示器５０に検出対象１０の出入り状況が表
示される。FIG. 3 is a block diagram showing a configuration of a processing unit 40 used in a conventional entrance / exit monitoring device. In the figure, 401 is a modem, 402 is a time calculation circuit, 403 is a field strength comparison circuit, and 404 is a display. It is a control circuit. The modem 401 demodulates the transmitted signal and outputs the number of the receiver 30, the ID number of the transmitter 20, the elapsed time, and the received electric field strength as data.
The reception time at 0 is calculated. Also, the electric field strength comparison circuit 40
In No. 3, it is determined that the radio wave is received when the received electric field strength is equal to or higher than a predetermined level, and the radio wave from the transmitter 20 is 2
When the receivers 30 are received, the receiver having the stronger received electric field strength is identified, and when the received electric field strengths are the same, the receiver 30b installed near the entrance 2 is identified. Then, the data determined and specified are sent to the display control circuit 404, and the display control circuit 404
Operates to display the entry / exit situation of the detection target 10 on the display 50.
【０００５】次に従来の出入監視装置で行う出入りの判
定について説明する。表示器５０の表示において検出区
画１内に検出対象１０が存在しないと判定された状態以
降に、受信機３０ａで発信機２０からの所定電界強度以
上の電波を受信した場合、検出区画１内に検出対象１０
が入ったと判断し、表示器５０にその旨の表示が行われ
る。また、表示器５０に検出対象１０が検出区画１内に
存在する旨の表示がなされている状態以降に、発信機２
０からの電波の受信電界強度が、受信機３０ａでの受信
電界強度より、受信機３０ｂでの受信電界強度が強くな
った場合、検出対象１０が検出区画１内から出たと判断
し、表示器５０にその旨の表示が行われる。すなわち、
発信機２０からの電波が検出区画１中央付近に設置した
受信機３０ａで受信される（あるいはその受信電界強度
が受信機３０ａでより強く受信される）場合には、検出
対象１０が当然検出区画１内に存在すると判断し、また
出入口２付近に設置した受信機３０ｂで受信される（あ
るいはその受信電界強度が受信機３０ｂでより強く受信
される）場合には、検出対象１０が当然出入口２付近に
存在し、このことは検出対象１０が検出区画１内から出
ることを意味するので、検出対象１０が検出区画１内か
ら出たと見做して、表示器５０にその旨が表示される。Next, the entrance / exit determination performed by the conventional entrance / exit monitoring device will be described. When the receiver 30a receives a radio wave having a predetermined electric field strength or more from the transmitter 20 after the state in which it is determined that the detection target 10 does not exist in the detection section 1 on the display of the display 50, Detection target 10
It is determined that “” has entered, and the display unit 50 displays a message to that effect. Further, after the display 50 indicates that the detection target 10 exists in the detection section 1, the transmitter 2
When the received electric field strength of the radio wave from 0 becomes stronger than the received electric field strength of the receiver 30a at the receiver 30b, it is determined that the detection target 10 is out of the detection section 1 and the display unit A message to that effect is displayed at 50. That is,
When the radio wave from the transmitter 20 is received by the receiver 30a installed near the center of the detection section 1 (or the reception electric field strength thereof is received stronger by the receiver 30a), the detection target 10 is naturally the detection section. 1 is determined to exist, and when the receiver 30b installed near the entrance 2 receives (or the received electric field strength is stronger received by the receiver 30b), the detection target 10 is naturally the entrance 2 Since it exists in the vicinity, and this means that the detection target 10 comes out of the detection section 1, it is considered that the detection target 10 has come out of the detection section 1, and the display unit 50 displays that fact. .
【０００６】[0006]
【発明が解決しようとする課題】従来の入出監視装置は
以上のように構成され動作するので、検出対象１０が受
信機３０ａと受信機３０ｂの中間付近に位置する場合、
誤った判断がなされてしまう場合がある。すなわち、検
出対象１０が受信機３０ａと受信機３０ｂの中間付近に
位置する場合、受信機３０ａでの受信電界強度と受信機
３０ｂでの受信電界強度とがほぼ等しくなるが、このよ
うな場合電波の受信環境の変化等により受信機３０ａの
方が一時的に強くなったり、受信機３０ｂの方が一時的
に強くなったりするふらつき状態が発生する。従来の装
置では実際には検出対象１０が中間付近に静止している
場合でもこのようなふらつきをそのまま検出してしまう
ため、出入りが繰り返されたと誤判断され、表示器５０
には出入りが繰り返される旨が表示さてしまう。Since the conventional entrance / exit monitoring device is constructed and operates as described above, when the detection target 10 is located near the middle of the receiver 30a and the receiver 30b,
Incorrect judgment may be made. That is, when the detection target 10 is located near the middle of the receiver 30a and the receiver 30b, the received electric field strength at the receiver 30a and the received electric field strength at the receiver 30b are almost equal. Due to changes in the receiving environment, the receiver 30a temporarily becomes stronger, and the receiver 30b temporarily becomes stronger. In the conventional device, even when the detection target 10 is actually stationary near the middle, such a wobble is detected as it is, so it is erroneously determined that the user repeatedly goes in and out, and the display device 50.
Will be displayed to the effect that you will be repeatedly in and out.
【０００７】本発明はかかる問題点を解決するためにな
されたものであり、簡単な構成で正確な出入りの検出が
できる入出監視装置を提供することを目的としている。The present invention has been made to solve the above problems, and an object thereof is to provide an entrance / exit monitoring device capable of accurately detecting entrance / exit with a simple structure.
【０００８】[0008]
【課題を解決するための手段】本発明に係わる入出監視
装置は、少なくとも検出区画内に第１の受信機を設置す
ると共にこの検出区画の出入口付近に第２の受信機を設
置し、検出対象に取り付けられた発信機からの無線信号
を上記第１の受信機で受信した場合に当該検出区画内に
当該検出対象が入ったと判断し（これを第１の判断と仮
称する）、これ以降に検出対象に取り付けられた発信機
からの無線信号を上記第２の受信機で受信した場合に当
該検出対象が出たと判断して（これを第２の判断と仮称
する）上記検出区画内を入出する検出対象を監視する入
出監視装置において、上記第１または第２の受信機が上
記発信機からの無線信号を受信した場合、所定時間内に
他の受信機が上記発信機からの無線信号を受信しない場
合に限り上記第１または第２の判断を行うことを特徴と
する。An entrance / exit monitoring apparatus according to the present invention has at least a first receiver installed in a detection section and a second receiver installed near the entrance of the detection section to detect an object to be detected. When the first receiver receives a radio signal from a transmitter attached to, it is determined that the detection target is included in the detection section (this is tentatively called the first determination), and thereafter. When the wireless signal from the transmitter attached to the detection target is received by the second receiver, it is determined that the detection target has come out (this is tentatively called the second determination) In the entry / exit monitoring device for monitoring the detection target, when the first or second receiver receives the wireless signal from the transmitter, another receiver receives the wireless signal from the transmitter within a predetermined time. Only if you do not receive the above 1st Others and performs a second determination.
【０００９】また、上記受信機が上記発信機からの無線
信号を受信したか否かの判断はデータ処理装置内に設け
た電界強度比較回路により行い、上記第１または第２の
受信機が上記発信機からの無線信号を受信した場合、所
定時間内に他の受信機が上記発信機からの無線信号を受
信しない場合に限り上記第１または第２の判断を行う手
段は、上記データ処理装置内に設けた電界強度比較回
路，記憶装置，タイマを用いて行う構成を特徴とする。Further, the judgment as to whether or not the receiver has received the radio signal from the transmitter is made by an electric field intensity comparison circuit provided in the data processing device, and the first or second receiver is When the wireless signal from the transmitter is received, the means for performing the first or second determination is the data processing device only when the other receiver does not receive the wireless signal from the transmitter within a predetermined time. The configuration is characterized by using an electric field strength comparison circuit, a storage device, and a timer provided inside.
【００１０】[0010]
【発明の実施の形態】以下、本発明の実施形態を図面を
用いて説明する。図１は本発明の一実施形態を説明する
ための図で、図において、１は検出区画、２はその出入
口、１０は検出対象（移動体）、２０は検出対象１０に
装着された発信機、３０ａは検出区画１内の中央付近に
設置された受信機、３０ｂは同じく出入口２付近に設置
された受信機、４０はデータ処理装置、５０は表示器で
あり、データ処理装置４０の構成を除いて従来の装置と
同様である。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram for explaining one embodiment of the present invention, in which 1 is a detection section, 2 is an entrance / exit of the detection section, 10 is a detection target (moving body), and 20 is a transmitter attached to the detection target 10. , 30a is a receiver installed in the vicinity of the center of the detection section 1, 30b is a receiver similarly installed in the vicinity of the entrance / exit 2, 40 is a data processing device, and 50 is a display device. The device is the same as the conventional device except.
【００１１】図２は、本実施形態におけるデータ処理装
置４０の構成を示すブロック図であり、図において、４
０１はモデム、４０２は時刻演算回路、４０３は電界強
度比較回路、４０４は表示制御回路、４１０は記憶装
置、４１１はタイマである。FIG. 2 is a block diagram showing the configuration of the data processing device 40 in this embodiment.
Reference numeral 01 is a modem, 402 is a time calculation circuit, 403 is an electric field intensity comparison circuit, 404 is a display control circuit, 410 is a storage device, and 411 is a timer.
【００１２】次に動作について説明する。従来の装置と
同様に各受信機３０は、発信機２０からの無線信号を受
信すると、受信電界強度，経過時間，当該発信機２０の
ＩＤ番号を検出し、これらに自己の発信機番号を付した
データをデータ処理装置４０へ信号として送信する。デ
ータ処理装置４０では、送られてきた信号をモデム４０
１で復調し、受信機３０の番号，発信機２０のＩＤ番
号，経過時間と受信電界強度とをデータとして出力し、
時刻演算回路４０２で受信機３０での受信時刻を算出す
る。また電界強度比較回路４０３では、受信電界強度が
所定レベル以上ある場合に電波を受信したとする判定、
発信機２０からの電波が同時に２台の受信機３０で受信
された場合に受信電界強度の強い方の受信機の特定、さ
らに受信電界強度が同じ場合には出入口２付近に設置し
た受信機３０ｂから受信したとする特定を行う。そして
これら判定，特定されたデータは、表示制御回路４０４
へ送られる前に、記憶装置４１０に一時保存され、受信
状況を把握した後で表示制御回路４０４に送られる。Next, the operation will be described. When receiving the radio signal from the transmitter 20, each receiver 30 detects the received electric field strength, the elapsed time, and the ID number of the transmitter 20, and assigns its own transmitter number to them, as in the conventional device. The generated data is transmitted as a signal to the data processing device 40. In the data processing device 40, the received signal is sent to the modem 40
1, demodulates and outputs the number of the receiver 30, the ID number of the transmitter 20, the elapsed time and the received electric field strength as data,
The time calculation circuit 402 calculates the reception time at the receiver 30. Further, the electric field strength comparison circuit 403 judges that a radio wave is received when the received electric field strength is equal to or higher than a predetermined level,
When the radio waves from the transmitter 20 are received by the two receivers 30 at the same time, the receiver having the stronger received electric field strength is identified, and when the received electric field strengths are the same, the receiver 30b installed near the entrance 2 is provided. It is determined that it was received from. The data determined and specified are displayed on the display control circuit 404.
Is temporarily stored in the storage device 410 before being sent to the display control circuit 404.
【００１３】次に受信状況の把握について説明する。受
信状況の把握は、発信機２０を装着した検出対象１０が
検出区画１内に存在する旨が表示器５０に表示されてい
る場合と否とで次のように異なる。すなわち検出対象１
０が検出区画１内に存在する旨が表示されている場合に
は、電界強度比較回路４０３で発信機２０からの電波が
受信機３０ａで受信されていると判断されており、従っ
て記憶装置４１０に、発信機２０のＩＤ番号，受信時刻
および受信機３０ａの受信機番号が記憶される。そし
て、検出対象１０が移動し、電界強度比較回路４０３で
の受信電界強度の判断が、受信機３０ｂでより強く受信
されたと判断されるようになった場合、記憶装置４１０
の記憶内容を消去し、新たに発信機２０のＩＤ番号，受
信時刻および受信機３０ｂの受信機番号が記憶される。
そして、タイマ４１１から時間情報を得、一定時間が経
過するまで受信機３０ａでの同じＩＤ番号の受信データ
が来ない場合、記憶装置４１０に記憶した受信機３０ｂ
での受信データを表示制御回路４０４に送り、表示器５
０上に検出対象１０が存在しない旨が表示される。Next, the grasp of the reception status will be described. The grasp of the reception status differs as follows depending on whether or not the display 50 indicates that the detection target 10 with the transmitter 20 is present in the detection section 1. That is, detection target 1
When 0 is displayed in the detection section 1, the electric field intensity comparison circuit 403 has determined that the radio wave from the transmitter 20 is being received by the receiver 30a, and therefore the storage device 410 is used. The ID number of the transmitter 20, the reception time, and the receiver number of the receiver 30a are stored in. When the detection target 10 moves and the judgment of the received electric field strength in the electric field strength comparison circuit 403 comes to be judged to be received more strongly in the receiver 30b, the storage device 410.
Then, the ID number of the transmitter 20, the reception time, and the receiver number of the receiver 30b are newly stored.
Then, when the time information is obtained from the timer 411 and the reception data of the same ID number does not arrive at the receiver 30a until a certain time has elapsed, the receiver 30b stored in the storage device 410 is stored.
The received data at the display is sent to the display control circuit 404, and the
A message indicating that the detection target 10 does not exist is displayed on 0.
【００１４】一方、タイマ４１１で一定時間が経過する
前に電界強度比較回路４０３が同じＩＤ番号の発信機２
０からの電波を受信機３０ａで受信した場合（または受
信機３０ａからの受信電界強度の方が強くなった場合）
には、記憶装置４１０の記憶内容を消去し、新たに発信
機２０のＩＤ番号，受信時刻および受信機３０ａの受信
機番号を記憶させるが、この時すぐには表示制御回路４
０４へこの受信データを送らず、受信電界強度のふらつ
きによる誤判断を防止する。On the other hand, before the elapse of a certain time in the timer 411, the electric field strength comparison circuit 403 causes the transmitter 2 having the same ID number to be transmitted.
When the radio wave from 0 is received by the receiver 30a (or when the electric field strength received from the receiver 30a becomes stronger)
In this case, the contents stored in the storage device 410 are erased, and the ID number of the transmitter 20, the reception time and the receiver number of the receiver 30a are newly stored.
This reception data is not sent to 04 to prevent erroneous judgment due to fluctuations in the reception electric field strength.
【００１５】すなわち、表示器５０で検出対象１０が検
出区画１内に存在すると表示されている場合、電界強度
比較回路４０３が受信電界強度のふらつきにより受信機
３０ａと３０ｂで交互に受信したと判断しても、表示制
御回路４０４にはこのふらつき状態は送られないため表
示器５０の表示内容が変化することなく、検出対象１０
は検出区画１内に存在していると正確に表示されること
になる。また、検出対象１０が検出区画１内から完全に
出た場合には、上述のようなふらつきは発生しないた
め、タイマ４１１で一定時間経過後に表示器５０の存在
を示す表示が消去されることになる。That is, when it is displayed on the display unit 50 that the detection target 10 is present in the detection section 1, it is determined that the electric field strength comparison circuit 403 has received alternately by the receivers 30a and 30b due to the fluctuation of the received electric field strength. However, since the fluctuation state is not sent to the display control circuit 404, the display content of the display unit 50 does not change, and the detection target 10 does not change.
Will be correctly displayed as being in the detection zone 1. Further, when the detection target 10 completely comes out of the detection section 1, the above-mentioned fluctuation does not occur, and therefore the display indicating the presence of the display device 50 is erased by the timer 411 after a certain time has elapsed. Become.
【００１６】次に、発信機２０を装着した検出対象１０
が検出区画１内に存在しないと表示器５０で表示されて
いる場合の処理について説明する。表示器５０で検出対
象１０が検出区画１内に存在しないと表示されている場
合、検出対象１０が遠方にいる場合には何れの受信機３
０ａ，３０ｂとも発信機２０からの電波は受信されない
が、検出対象１０が出入口２に近づくと、電界強度比較
回路４０３では受信機３０ｂが受信したと判断する。そ
してこの判断がなされた場合には、記憶装置４１０に発
信機２０のＩＤ番号，受信時刻および受信機３０ｂの受
信機番号が記憶される。Next, the detection target 10 equipped with the transmitter 20
The process in the case where is displayed on the display device 50 as not existing in the detection section 1 will be described. When the detection target 10 is displayed on the display unit 50 as not existing in the detection section 1, and when the detection target 10 is distant, which receiver 3
No radio wave from the transmitter 20 is received by either 0a or 30b, but when the detection target 10 approaches the entrance / exit 2, the electric field strength comparison circuit 403 determines that the receiver 30b has received. When this determination is made, the storage device 410 stores the ID number of the transmitter 20, the reception time, and the receiver number of the receiver 30b.
【００１７】そして更に検出対象１０が移動して検出区
画１内に進入していった場合、発信機２０からの電波が
受信機３０ａでも受信されるようになり、さらに受信機
３０ａの受信電界強度が強くなり、受信機３０ｂより上
回るようになる。そして受信機３０ａの受信電界強度が
上回った場合、電界強度比較回路４０３では発信機２０
の電波を受信機３０ａで受信したと判断し、記憶装置４
１０の記憶内容を消去し、新たに発信機２０のＩＤ番
号，受信時刻および受信機３０ａの受信機番号を記憶さ
せるが、この時すぐには表示制御回路４０４へこのデー
タは送らない。When the detection object 10 further moves and enters the detection section 1, the radio wave from the transmitter 20 is also received by the receiver 30a, and the reception electric field strength of the receiver 30a is further received. Becomes stronger and exceeds the receiver 30b. When the received electric field strength of the receiver 30a exceeds the electric field strength comparison circuit 403, the transmitter 20
It is determined that the receiver 30a has received the radio wave of
Although the stored contents of 10 are erased and the ID number of the transmitter 20, the reception time and the receiver number of the receiver 30a are newly stored, this data is not sent to the display control circuit 404 immediately at this time.
【００１８】そしてタイマ４１１で一定時間が経過する
まで受信機３０ｂでの受信がないと電界強度比較回路４
０３で判断した場合、記憶装置４１０に記憶した受信機
３０ａでの受信データを表示制御回路４０４に送り、表
示装置５０に検出対象１０が検出区画１内に存在する旨
を表示する。一方、タイマ４１１で一定時間が経過する
前に、電界強度比較回路４０３で発信機２０からの電波
を受信機３０ｂが受信したと判断した場合には、記憶装
置４１０の記憶内容を消去し、新たに発信機２０のＩＤ
番号，受信時刻および受信機３０ｂの受信機番号を記憶
するが、この時には一定時間が経過するまで、このデー
タを表示制御回路４０４へは送らない。If there is no reception at the receiver 30b until a predetermined time elapses at the timer 411, the electric field strength comparison circuit 4
When the determination is made in 03, the reception data at the receiver 30a stored in the storage device 410 is sent to the display control circuit 404, and the display device 50 displays that the detection target 10 exists in the detection section 1. On the other hand, if the electric field strength comparison circuit 403 determines that the radio wave from the transmitter 20 has been received by the receiver 30b before the timer 411 has elapsed a certain time, the stored contents of the storage device 410 are erased and a new ID of transmitter 20
The number, the reception time, and the receiver number of the receiver 30b are stored, but at this time, this data is not sent to the display control circuit 404 until a fixed time has elapsed.
【００１９】すなわち、表示器５０では検出対象１０が
検出区画１内には存在しないと表示されている場合、電
界強度比較回路４０３が受信電界強度のふらつきにより
受信機３０ａと３０ｂで交互に受信したと判断しても表
示制御回路４０４にはそのデータは送られないため表示
器５０の表示内容が変化することなく、検出対象１０が
検出区画１内に存在しないと正確に表示されることにな
る。また、検出対象１０が検出区画１内に完全に進入し
た場合には、上述のようなふらつきは発生しないため、
タイマ４１１で一定時間経過後に検出対象１０が検出区
画１内に存在する旨が表示器５０に表示される。That is, when the display object 50 indicates that the detection target 10 does not exist in the detection section 1, the electric field strength comparison circuit 403 alternately receives at the receivers 30a and 30b due to the fluctuation of the received electric field strength. Even if it is determined that the data is not sent to the display control circuit 404, the display content of the display 50 does not change, and the detection target 10 is accurately displayed if it does not exist in the detection section 1. . Further, when the detection target 10 completely enters the detection section 1, the above-mentioned fluctuation does not occur,
The timer 411 displays on the display unit 50 that the detection target 10 is present in the detection section 1 after a certain time has elapsed.
【００２０】なお、タイマ４１１で設定する所定時間
は、設置環境に応じて調整することとする。The predetermined time set by the timer 411 is adjusted according to the installation environment.
【００２１】[0021]
【発明の効果】以上説明したように本発明の入出監視装
置は、２台の受信機の中間付近に検出対象が存在し、受
信環境の影響等により２台の受信機が交互に検出対象か
らの電波を受信する様なふらつきが発生する場合でも、
誤検出することなく正確な出入りの判断が行えるという
効果がある。As described above, in the entrance / exit monitoring device of the present invention, the detection target exists near the middle of the two receivers, and the two reception devices are alternately detected due to the influence of the reception environment. Even when there is a stagger like the reception of radio waves,
There is an effect that an accurate entry / exit determination can be performed without erroneous detection.
【図１】入出監視装置の構成例を示す図である。FIG. 1 is a diagram illustrating a configuration example of an entry / exit monitoring device.
【図２】本発明の一実施形態を説明するためのブロック
図である。FIG. 2 is a block diagram illustrating an embodiment of the present invention.
【図３】従来の装置におけるデータ処理装置を示すブロ
ック図である。FIG. 3 is a block diagram showing a data processing device in a conventional device.
１ 検出区画 ２ 出入口 １０ 検出対象 ２０ 検出対象１０に装着された発信機 ３０ａ 検出区画内の中央付近に設置された受信機 ３０ｂ 出入口２付近に設置された受信機 ４０ データ処理装置 ５０ 表示器 ４０１ モデム ４０２ 時刻演算回路 ４０３ 電界強度比較回路 ４０４ 表示制御回路 ４１０ 記憶装置 ４１１ タイマ DESCRIPTION OF SYMBOLS 1 Detection section 2 Entrance / exit 10 Detection target 20 Transmitter mounted on the detection target 10 30a Receiver installed near the center in the detection section 30b Receiver installed near the entrance / exit 2 40 Data processing device 50 Display 401 Modem 402 time calculation circuit 403 electric field strength comparison circuit 404 display control circuit 410 storage device 411 timer
Claims (2)
設置すると共にこの検出区画の出入口付近に第２の受信
機を設置し、検出対象に取り付けられた発信機からの無
線信号を上記第１の受信機で受信した場合（ここで言う
受信した場合とは、一定以上の受信電界強度で受信した
場合であり、また複数の受信機で同時に受信した場合に
は１番受信電界強度が強い受信機が受信したと見做し、
さらに複数の受信機で同じ電界強度で受信した場合には
上記第２の受信機で受信したと見做す場合を言う。以
下、同じ）に当該検出区画内に当該検出対象が入ったと
判断し（これを第１の判断と仮称する）、これ以降に検
出対象に取り付けられた発信機からの無線信号を上記第
２の受信機で受信した場合に当該検出対象が出たと判断
して（これを第２の判断と仮称する）上記検出区画内を
入出する検出対象を監視する入出監視装置において、 上記第１または第２の受信機が上記発信機からの無線信
号を受信した場合、所定時間内に他の受信機が上記発信
機からの無線信号を受信しない場合に限り上記第１また
は第２の判断を行うことを特徴とする入出監視装置。1. A first receiver is installed at least in a detection section and a second receiver is installed near an entrance of the detection section, and a radio signal from a transmitter attached to a detection target is transmitted to the first receiver. When the signal is received by one receiver ("Received here" means that the signal is received with a certain level or more of received field strength, and when multiple receivers simultaneously receive, the first received field strength is strong. Considered that the receiver received,
Further, the case where the plurality of receivers receive the same electric field strength is considered to be received by the second receiver. (Hereinafter, the same), it is determined that the detection target has entered the detection section (this is tentatively referred to as the first determination), and thereafter the radio signal from the transmitter attached to the detection target is set to the second determination result. In the entry / exit monitoring device for deciding that the detection target has come out when it is received by the receiver (this is tentatively referred to as a second decision), and monitoring the detection object going in and out of the detection section, the first or second When the receiver of 1 receives the wireless signal from the transmitter, the first or second determination is performed only when another receiver does not receive the wireless signal from the transmitter within a predetermined time. Characteristic entry / exit monitoring device.
を受信したか否かの判断はデータ処理装置内に設けた電
界強度比較回路により行い、上記第１または第２の受信
機が上記発信機からの無線信号を受信した場合、所定時
間内に他の受信機が上記発信機からの無線信号を受信し
ない場合に限り上記第１または第２の判断を行う手段
は、上記データ処理装置内に設けた電界強度比較回路，
記憶装置，タイマを用いて行う構成を特徴とする請求項
第１項記載の入出監視装置。2. The judgment as to whether or not the receiver has received the radio signal from the transmitter is made by an electric field strength comparison circuit provided in the data processing device, and the first or second receiver is When the wireless signal from the transmitter is received, the means for performing the first or second determination is the data processing device only when the other receiver does not receive the wireless signal from the transmitter within a predetermined time. Electric field strength comparison circuit provided inside,
The entry / exit monitoring device according to claim 1, wherein the entry / exit monitoring device is configured to use a storage device and a timer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03428496A JP3686469B2 (en) | 1996-01-30 | 1996-01-30 | Entrance / exit monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03428496A JP3686469B2 (en) | 1996-01-30 | 1996-01-30 | Entrance / exit monitoring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09212759A true JPH09212759A (en) | 1997-08-15 |
| JP3686469B2 JP3686469B2 (en) | 2005-08-24 |
Family
ID=12409868
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03428496A Expired - Fee Related JP3686469B2 (en) | 1996-01-30 | 1996-01-30 | Entrance / exit monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3686469B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017072810A1 (en) * | 2015-10-26 | 2017-05-04 | 株式会社ベイビッグ | Detection system and detection method |
| JP2017227531A (en) * | 2016-06-22 | 2017-12-28 | 株式会社ベイビッグ | Detection system and detection method |
-
1996
- 1996-01-30 JP JP03428496A patent/JP3686469B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017072810A1 (en) * | 2015-10-26 | 2017-05-04 | 株式会社ベイビッグ | Detection system and detection method |
| JPWO2017072810A1 (en) * | 2015-10-26 | 2017-10-26 | 株式会社ベイビッグ | Detection system and detection method |
| JP2017227531A (en) * | 2016-06-22 | 2017-12-28 | 株式会社ベイビッグ | Detection system and detection method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3686469B2 (en) | 2005-08-24 |
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