JP2007277829A - Reflection type sensor for automatic door - Google Patents

Reflection type sensor for automatic door Download PDF

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JP2007277829A
JP2007277829A JP2006102134A JP2006102134A JP2007277829A JP 2007277829 A JP2007277829 A JP 2007277829A JP 2006102134 A JP2006102134 A JP 2006102134A JP 2006102134 A JP2006102134 A JP 2006102134A JP 2007277829 A JP2007277829 A JP 2007277829A
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light
monitoring
doorway
adjustment mode
column
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JP4845565B2 (en
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Takenori Ohara
丈典 大原
Munenori Okano
宗徳 岡野
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HIISUTO KK
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Abstract

<P>PROBLEM TO BE SOLVED: To prevent an ordinary monitoring row from approaching the doorway too much, when adjusting a doorway monitoring row, in a reflection type sensor for an automatic door for arranging and setting one of its monitoring rows on the doorway as the doorway monitoring row, by setting a plurality of monitoring rows parallel to the moving direction of the door, by irradiating the spotlight in a matrix shape to a floor surface in the vicinity of the automatic door including a doorway part. <P>SOLUTION: This reflection type sensor has an adjusting mode used when setting the doorway monitoring row WL1 in the doorway DW part and an operation mode of validating all the monitoring rows including the doorway monitoring row WL1 and the ordinary monitoring rows WL2 to WL4, and validates only the ordinary monitoring row WL2 adjacent just near the doorway monitoring row WL1 in the adjusting mode. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、自動ドア用反射型センサに関し、さらに詳しく言えば、自動ドア近傍の床面にスポット光をマトリクス状に照射して監視領域を形成する自動ドア用反射型センサに関するものである。   The present invention relates to a reflective sensor for automatic doors, and more particularly to a reflective sensor for automatic doors that forms a monitoring area by irradiating a floor surface near an automatic door in a matrix.

自動ドア用反射型センサは、基本的な構成として、自動ドアの上方空間にペアとして配置される発光部と受光部とを備え、発光部より自動ドア近傍の床面に光を照射し、その反射光を受光部にて受光し、その受光レベルの変動に応じて自動ドアに対して開閉信号を出力する。   The reflective sensor for automatic doors has a light emitting part and a light receiving part arranged as a pair in the upper space of the automatic door as a basic structure, and irradiates light from the light emitting part to the floor surface near the automatic door. The reflected light is received by the light receiving unit, and an open / close signal is output to the automatic door in accordance with the fluctuation of the received light level.

自動ドア用反射型センサの安全性と検出精度の向上をはかるため、例えば特許文献１に記載されているように、監視領域からスポット光による画素的な情報を得て、自動ドアに対する物体の進入方向を判断したり、また、各種のノイズによる誤動作を防止することが行われている。   In order to improve the safety and detection accuracy of the reflective sensor for automatic doors, for example, as described in Patent Document 1, pixel-like information by spot light is obtained from the monitoring area, and an object enters the automatic door. The direction is judged and malfunctions due to various noises are prevented.

その従来例を図４ないし図８により説明する。まず、図５に自動ドア１のドアウェイＤＷに沿って発光部より照射された１列分の例えば８個のスポット光ＳＰ１１〜ＳＰ１８を示す。なお、ここで説明する自動ドア１は引き戸式であり、ドアウェイＤＷとはドアが移動する部分を言う。   A conventional example will be described with reference to FIGS. First, FIG. 5 shows, for example, eight spot lights SP11 to SP18 for one row irradiated from the light emitting unit along the doorway DW of the automatic door 1. FIG. In addition, the automatic door 1 demonstrated here is a sliding door type, and the doorway DW means the part to which a door moves.

このようなスポット光を得るため、図４（ａ）に示すように、発光部１０は８個の発光素子ＬＤ１１〜ＬＤ１８を備える。また、図４（ｂ）に示すように、受光部２０は同じく８個の受光素子ＰＤ１１〜ＰＤ１８を備える。   In order to obtain such spot light, the light emitting unit 10 includes eight light emitting elements LD11 to LD18 as shown in FIG. Moreover, as shown in FIG.4 (b), the light-receiving part 20 is similarly provided with eight light receiving element PD11-PD18.

なお、参照符号について、発光素子，受光素子ともに説明上各素子を区別する必要がない場合には、発光素子については単に発光素子ＬＤとし、受光素子については単に受光素子ＰＤとする。また、スポット光についても説明上区別する必要がない場合には、単にスポット光ＳＰとする。   In addition, regarding the reference symbols, when it is not necessary to distinguish between the light emitting element and the light receiving element, the light emitting element is simply referred to as the light emitting element LD, and the light receiving element is simply referred to as the light receiving element PD. Further, in the case where it is not necessary to distinguish the spot light for explanation, it is simply referred to as the spot light SP.

発光素子ＬＤ１１〜ＬＤ１８と受光素子ＰＤ１１〜ＰＤ１８はともに１列並びで、発光素子ＬＤ１１〜ＬＤ１８からの光が例えば単眼レンズ３ａを通して床面上に１列分のスポット光ＳＰ１１〜ＳＰ１８として照射され、その反射光が単眼レンズ３ｂを通して受光素子ＰＤ１１〜ＰＤ１８にて受光される。   The light emitting elements LD11 to LD18 and the light receiving elements PD11 to PD18 are both arranged in a line, and light from the light emitting elements LD11 to LD18 is irradiated as spot light SP11 to SP18 for one line on the floor surface through, for example, the monocular lens 3a. The reflected light is received by the light receiving elements PD11 to PD18 through the monocular lens 3b.

この場合、発光素子ＬＤ１１〜ＬＤ１８は同時発光ではなく、まず、発光素子ＬＤ１１を発光させて受光素子ＰＤ１１で受光する。次に、発光素子ＬＤ１２を発光させて受光素子ＰＤ１２で受光する。このように、発光素子ＬＤを順次発光させることにより、床面上に生成されたアクティブスポットを走査することができる。なお、発光素子ＬＤを個別に選択して発光させるに伴って、受光素子ＰＤ側も対応する素子が個別に選択される。   In this case, the light emitting elements LD11 to LD18 do not emit simultaneously, but first the light emitting element LD11 emits light and is received by the light receiving element PD11. Next, the light emitting element LD12 emits light and is received by the light receiving element PD12. As described above, the active spots generated on the floor surface can be scanned by sequentially causing the light emitting elements LD to emit light. As the light emitting element LD is individually selected to emit light, the corresponding element on the light receiving element PD side is also individually selected.

実際の監視領域では、自動ドア１の近傍の床面上に上記のスポット光列が複数列分生成される。図７に、図５のスポット光ＳＰ１１〜ＳＰ１８を第１監視列ＷＬ１として、その手前側にスポット光ＳＰ２１〜ＳＰ２８を含む第２監視列ＷＬ２，スポット光ＳＰ３１〜ＳＰ３８を含む第３監視列ＷＬ３およびスポット光ＳＰ４１〜ＳＰ４８を含む第４監視列ＷＬ４を生成した場合のアクティブスポットのエリア構成を示す。   In the actual monitoring region, a plurality of the above-mentioned spot light columns are generated on the floor surface in the vicinity of the automatic door 1. In FIG. 7, the spot lights SP11 to SP18 of FIG. 5 are designated as the first monitoring line WL1, the second monitoring line WL2 including the spot lights SP21 to SP28 on the front side thereof, the third monitoring line WL3 including the spot lights SP31 to SP38, and The area configuration of the active spot when the fourth monitoring row WL4 including the spot lights SP41 to SP48 is generated is shown.

このようなマトリクス状のアクティブスポットエリアを生成する場合、図６（ａ）に示すように、発光部１０には、１列８個として３２個の発光素子ＬＤが４列，すなわち４列×８行のマトリクス状に並べられることになる。同様に、図６（ｂ）に示すように、受光部２０には、１列８個として３２個の受光素子ＰＤが４列に並べられることになる。   When generating such a matrix-shaped active spot area, as shown in FIG. 6A, the light-emitting unit 10 includes four light-emitting elements LD in four rows, that is, 32 light-emitting elements LD, that is, 4 rows × 8. They will be arranged in a matrix of rows. Similarly, as shown in FIG. 6B, 32 light receiving elements PD are arranged in 4 rows in the light receiving unit 20 as 8 in one row.

この場合においても、発光素子ＬＤと受光素子ＰＤとが個別的に選択されて１スポットずつ走査される。図８（ａ）に発光部１０側の駆動回路の一例を示し、また、図８（ｂ）に受光部２０側の受光回路の一例を示す。   Also in this case, the light emitting element LD and the light receiving element PD are individually selected and scanned one spot at a time. FIG. 8A shows an example of a driving circuit on the light emitting unit 10 side, and FIG. 8B shows an example of a light receiving circuit on the light receiving unit 20 side.

これによると、発光部１０側の発光駆動部には、各列ごとに接続される列ドライバ素子１１ａ〜１１ｄと、各行ごとに接続される行ドライバ素子１２ａ〜１２ｈとを備えるマトリクスドライブ方式が採用されており、例えば図８（ａ）に示すように、第４列，第１行目の発光素子ＬＤ４１を発光させる場合、列ドライバ素子１１ｄと行ドライバ素子１２ａとがオンにされる。   According to this, a matrix drive system including column driver elements 11a to 11d connected to each column and row driver elements 12a to 12h connected to each row is adopted for the light emission drive unit on the light emitting unit 10 side. For example, as shown in FIG. 8A, when the light emitting elements LD41 in the fourth column and the first row emit light, the column driver elements 11d and the row driver elements 12a are turned on.

受光部２０側では、すべての受光素子ＰＤがマルチプレクサ的な選択回路２１に接続され、選択回路２１により選択された１つの受光素子ＰＤの受光信号が例えば増幅器２２を介して制御部２３に与えられる。   On the light receiving unit 20 side, all the light receiving elements PD are connected to a multiplexer-like selection circuit 21, and a light reception signal of one light receiving element PD selected by the selection circuit 21 is given to the control unit 23 via an amplifier 22, for example. .

上記のように、例えば発光部１０側で、第４列，第１行目の発光素子ＬＤ４１が発光しているとすれば、選択回路２１によりそれに対応する第４列，第１行目の受光素子ＰＤ４１が選択される。なお、制御部２３は、受光素子ＰＤの受光レベルの変動を監視し、その変動に応じて自動ドア１に開閉信号を出力する。   As described above, for example, if the light emitting element LD41 in the fourth column and the first row emits light on the light emitting unit 10 side, the light receiving element LD41 corresponding to the fourth column and the first row is received by the selection circuit 21. Element PD41 is selected. The control unit 23 monitors the change in the light receiving level of the light receiving element PD, and outputs an opening / closing signal to the automatic door 1 in accordance with the change.

特開平１１−３１１０６０号公報Japanese Patent Laid-Open No. 11-311060

ところで、この種の自動ドア用反射型センサのうちの１部の機種では、上記第１ないし第４監視列ＷＬ１〜ＷＬ４を２つのグループに分け、図９（ａ）に示すように、第１監視列ＷＬ１を自動ドア１のドアウェイＤＷ上に配置してドアウェイ監視列とし、第２ないし第４監視列ＷＬ２〜ＷＬ４をドア近傍の床面上に配置することが行われている。   By the way, in some models of this type of reflective sensor for automatic doors, the first to fourth monitoring rows WL1 to WL4 are divided into two groups, and as shown in FIG. The monitoring row WL1 is arranged on the doorway DW of the automatic door 1 to be a doorway monitoring row, and the second to fourth monitoring rows WL2 to WL4 are arranged on the floor near the door.

この場合、第１監視列であるドアウェイ監視列ＷＬ１は、ドアの移動を自己学習する目的および／または外部からのドア位置情報によりドアの移動パターンを認識してドア自体の移動を検知しない制御をソフトウェアで行う目的で用いられる。   In this case, the doorway monitoring column WL1, which is the first monitoring column, performs the control of not detecting the movement of the door by recognizing the movement pattern of the door based on the purpose of self-learning the door movement and / or the door position information from the outside Used for software purposes.

これに対して、第２ないし第４監視列ＷＬ２〜ＷＬ４は、ドア近傍の物体を検知する監視列であり、本明細書では、これらの監視列をドアウェイ監視列と区別する意味で通常監視列という。   On the other hand, the second to fourth monitoring columns WL2 to WL4 are monitoring columns that detect objects in the vicinity of the door. In this specification, the normal monitoring columns are used to distinguish these monitoring columns from the doorway monitoring columns. That's it.

制御部２３には、ドアウェイ監視列ＷＬ１をドアウェイＤＷ上に配置する際の調整モードと、すべての監視列により物体の有無を検知する運用モードとが設定されており、調整モード時には、図９（ａ）に示すように、ドアウェイ監視列ＷＬ１のみを有効とする。   The control unit 23 is set with an adjustment mode for arranging the doorway monitoring line WL1 on the doorway DW and an operation mode for detecting the presence or absence of an object by all the monitoring lines. As shown in a), only the doorway monitoring line WL1 is enabled.

この状態で、ドアウェイ監視列ＷＬ１がドアウェイＤＷ上の所定位置に配置されるように発光部１０および受光部２０の傾きなどを調整したのち、調整モードを解除して運用モードに入る。なお、発光素子ＬＤには、通常、赤外線発光素子が用いられるため、ドアウェイ監視列ＷＬ１の位置調整は、図示しない赤外線検知器を用いて行われる。   In this state, after adjusting the inclination of the light emitting unit 10 and the light receiving unit 20 so that the doorway monitoring line WL1 is arranged at a predetermined position on the doorway DW, the adjustment mode is canceled and the operation mode is entered. In addition, since an infrared light emitting element is normally used for the light emitting element LD, the position adjustment of the doorway monitoring line WL1 is performed using an infrared detector (not shown).

しかしながら、ドアウェイ監視列ＷＬ１がドアウェイＤＷの位置からずれて、図９（ｂ）に示すように、その最適位置より例えばドアの内側寄りに設定された場合、この状態で運用モードに入ると、ドアウェイ監視列ＷＬ１に隣接する通常監視列（第２監視列）ＷＬ２がドアウェイＤＷに接近し、ドアの動きを検知てしまうことがある。そうすると、ドアの開閉が永遠に繰り返されるチャタリング現象が生ずるという問題が起こる。   However, if the doorway monitoring line WL1 is shifted from the position of the doorway DW and is set, for example, closer to the inside of the door than the optimum position as shown in FIG. 9B, when the operation mode is entered in this state, the doorway The normal monitoring row (second monitoring row) WL2 adjacent to the monitoring row WL1 may approach the doorway DW and detect the door movement. Then, there arises a problem that a chattering phenomenon in which the opening and closing of the door is repeated forever occurs.

したがって、本発明の課題は、自動ドア近傍の床面にドアウェイの部分を含めてスポット光をマトリクス状に照射してドアの移動方向と平行な複数の監視列を設定し、その監視列の一つをドアウェイ上に配置してドアウェイ監視列とする自動ドア用反射型センサにおいて、ドアウェイ監視列の調整時に通常監視列がドアウェイに接近しすぎないようにすることにある。   Accordingly, an object of the present invention is to set a plurality of monitoring columns parallel to the moving direction of the door by irradiating a spot light including a doorway portion on the floor surface in the vicinity of the automatic door in a matrix form. In the reflection type sensor for automatic doors, which is arranged on the doorway and used as the doorway monitoring row, the normal monitoring row is prevented from being too close to the doorway when the doorway monitoring row is adjusted.

上記課題を解決するため、本発明は、請求項１に記載されているように、マトリクス状に配列された複数の発光素子を有する発光部と、上記複数の発光素子と対応してマトリクス状に配列された複数の受光素子を有し、上記発光部とともに自動ドアの上部空間に配置される受光部と、上記受光部から出力される受光信号のレベルに応じて上記自動ドアに開閉信号を出力するとともに、上記発光部と上記受光部とを制御する制御部とを含み、上記発光部の各発光素子から上記自動ドア近傍の床面にドアウェイの部分を含めてスポット光をマトリクス状に照射してドアの移動方向と平行な複数の監視列を設定し、その監視列単位で物体の有無を検知する自動ドア用反射型センサにおいて、上記ドアウェイの部分に設定される監視列を特定用途のドアウェイ監視列とし、その他の監視列をドア起動用の通常監視列として、上記制御部は、上記ドアウェイ監視列を上記ドアウェイの部分に設定する際に用いられる調整モードと、上記ドアウェイ監視列および上記通常監視列を含めてすべての監視列を有効とする運用モードとを備え、上記調整モード時には、上記ドアウェイ監視列に直近として隣接する通常監視列のみを有効とすることを特徴としている。   In order to solve the above-described problems, the present invention provides a light emitting unit having a plurality of light emitting elements arranged in a matrix and a matrix corresponding to the plurality of light emitting elements. A plurality of light receiving elements arranged, and a light receiving unit disposed in the upper space of the automatic door together with the light emitting unit, and an open / close signal to the automatic door according to the level of the light receiving signal output from the light receiving unit And a control unit that controls the light emitting unit and the light receiving unit, and irradiates spot light in a matrix form including the doorway portion from the light emitting elements of the light emitting unit to the floor surface near the automatic door. In a reflective sensor for automatic doors that detects the presence or absence of an object for each monitoring row, the monitoring row set in the doorway portion is set for a specific application. The control unit is configured to use the adjustment mode used when setting the doorway monitoring column in the doorway portion, the doorway monitoring column, and the doorway monitoring column. And an operation mode in which all the monitoring columns including the normal monitoring column are enabled. In the adjustment mode, only the normal monitoring column adjacent to the doorway monitoring column is enabled.

本発明の好ましい態様によれば、請求項２に記載されているように、上記制御部は、上記調整モード時に所定の報知手段により調整モードであることを報知する。   According to a preferred aspect of the present invention, as described in claim 2, the control unit notifies that the adjustment mode is set by a predetermined notification means during the adjustment mode.

また、本発明には、請求項３に記載されているように、上記制御部は、上記調整モードとしてから上記自動ドアの開閉数を計数し、その開閉数が所定回数に達した時点で、上記調整モードから上記運用モードに切り替える態様と、請求項４に記載されているように、上記制御部は、上記調整モードとしてから所定時間経過後に、上記調整モードから上記運用モードに切り替える態様のいずれかが好ましく含まれる。   Further, in the present invention, as described in claim 3, the control unit counts the number of opening and closing of the automatic door from the adjustment mode, and when the number of opening and closing reaches a predetermined number of times, Either of the mode for switching from the adjustment mode to the operation mode and the mode for switching the operation mode from the adjustment mode to the operation mode after the elapse of a predetermined time since the adjustment mode has been set. Are preferably included.

請求項１に記載の発明によれば、調整モード時には、ドアウェイ監視列に直近として隣接する通常監視列のみが有効とされるため、通常監視列をドアを検知することがない位置に確実に設定することができる。   According to the first aspect of the present invention, in the adjustment mode, since only the normal monitoring row adjacent to the doorway monitoring row is effective, the normal monitoring row is surely set to a position where the door is not detected. can do.

また、請求項２に記載の発明によれば、調整モード時には報知手段としての例えばセンサのハウジングに設けられた発光ダイオードが点滅表示されるため、作業者に調整モードであることを明示的に知らしめることができる。   According to the second aspect of the present invention, since the light emitting diode provided in the housing of the sensor, for example, as a notification means flashes in the adjustment mode, the operator is explicitly informed that the adjustment mode is in effect. It can be tightened.

また、請求項３の発明によれば、調整モードとしてから自動ドアが所定回数開閉された時点で、また、請求項４の発明によれば、調整モードとしてから所定時間経過後に、調整モードから運用モードに自動的に切り替えられるため、作業者による調整モードから運用モードへの復帰設定のし忘れを防止することができる。   According to the invention of claim 3, when the automatic door is opened and closed a predetermined number of times after entering the adjustment mode, and according to the invention of claim 4, the operation is started from the adjustment mode after a predetermined time has passed since the adjustment mode was entered. Since the mode is automatically switched, it is possible to prevent the operator from forgetting to return to the operation mode from the adjustment mode.

次に、図１ないし図３により本発明の実施形態について説明するが、本発明はこれに限定されるものではない。   Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 3, but the present invention is not limited to this.

図１（ａ）に本発明による自動ドア用反射型センサが備える発光部１０Ａの構成例を示し、図１（ｂ）に発光部１０Ａの相手方である受光部２０Ａの構成例を示す（いずれも模式的な平面図）。なお、発光部１０Ａ，受光部２０Ａともに複数の素子がマトリクス状に配列されるが、図１において、Ｘ軸方向（水平方向）を列方向とし、Ｙ軸方向（垂直方向）を行方向とする。   FIG. 1 (a) shows a configuration example of a light emitting unit 10A included in a reflective sensor for an automatic door according to the present invention, and FIG. 1 (b) shows a configuration example of a light receiving unit 20A that is a counterpart of the light emitting unit 10A. Schematic plan view). A plurality of elements are arranged in a matrix in both the light emitting unit 10A and the light receiving unit 20A. In FIG. 1, the X-axis direction (horizontal direction) is the column direction, and the Y-axis direction (vertical direction) is the row direction. .

この実施形態においても、先の図６で説明した従来例と同じく、発光部１０Ａは４列×８行のマトリクス配列とした３２個の発光素子ＬＤを備え、これに対応して受光部２０Ａも４列×８行のマトリクス配列とした３２個の受光素子ＰＤを備えており、これにより図２に示すように、自動ドア１の近傍の床面に４列×８行のマトリクス配列としたアクティブスポットのエリアを生成する。   Also in this embodiment, as in the conventional example described with reference to FIG. 6, the light emitting unit 10A includes 32 light emitting elements LD arranged in a matrix of 4 columns × 8 rows, and the light receiving unit 20A also corresponds to this. 32 light-receiving elements PD having a matrix arrangement of 4 columns × 8 rows are provided. As a result, as shown in FIG. 2, an active array having a matrix arrangement of 4 columns × 8 rows on the floor near the automatic door 1 is provided. Create a spot area.

この実施形態においては、センサの部品コストを削減することを意図して、発光部１０Ａの複数の発光素子ＬＤは、行方向もしくは列方向のいずれか一方のラインごとに発光素子群として群分けされ、これに対して受光部２０Ａの複数の受光素子ＰＤは、行方向もしくは列方向のいずれか他方のラインごとに受光素子群として群分けされる。   In this embodiment, the plurality of light emitting elements LD of the light emitting unit 10A are grouped as a light emitting element group for each line in the row direction or the column direction in order to reduce the component cost of the sensor. On the other hand, the plurality of light receiving elements PD of the light receiving unit 20A are grouped as a light receiving element group for each other line in the row direction or the column direction.

この例では、発光部１０Ａの３２個の発光素子ＬＤは、それぞれ８個として第１ないし第４の４列の発光素子群Ｘ１〜Ｘ４に群分けされている。なお、説明上各発光素子群を区別する必要がない場合には、単に発光素子群Ｘという。   In this example, the 32 light emitting elements LD of the light emitting unit 10A are grouped as 8 light emitting element groups X1 to X4 in the first to fourth rows. In addition, when it is not necessary to distinguish each light emitting element group on description, it is only called the light emitting element group X.

すなわち、第１列目の第１発光素子群Ｘ１には発光素子ＬＤ１１〜ＬＤ１８が含まれ、第２列目の第２発光素子群Ｘ２には発光素子ＬＤ２１〜ＬＤ２８が含まれ、第３列目の第３発光素子群Ｘ３には発光素子ＬＤ３１〜ＬＤ３８が含まれ、第４列目の第４発光素子群Ｘ４には発光素子ＬＤ４１〜ＬＤ４８が含まれ、各発光素子群Ｘ内の発光素子ＬＤは同時に発光するように電気的に接続されている。   That is, the first light emitting element group X1 in the first column includes light emitting elements LD11 to LD18, the second light emitting element group X2 in the second column includes light emitting elements LD21 to LD28, and the third column. The third light emitting element group X3 includes light emitting elements LD31 to LD38, the fourth light emitting element group X4 in the fourth column includes light emitting elements LD41 to LD48, and the light emitting elements LD in each light emitting element group X. Are electrically connected to emit light simultaneously.

これに関連して、発光部１０Ａの発光駆動部１１は、発光素子群Ｘ１〜Ｘ４をその群単位で駆動する。この例においては、発光素子群Ｘ１〜Ｘ４の各々に列ドライバ素子１１ａ〜１１ｄが接続され、発光素子群Ｘ１〜Ｘ４が例えばＸ１→Ｘ２→Ｘ３→Ｘ４→Ｘ１…の順序でサイクリック的に駆動される。   In relation to this, the light emission driving unit 11 of the light emitting unit 10A drives the light emitting element groups X1 to X4 in units of groups. In this example, the column driver elements 11a to 11d are connected to each of the light emitting element groups X1 to X4, and the light emitting element groups X1 to X4 are cyclically driven in the order of, for example, X1, X2, X3, X4, X1,. Is done.

この実施形態によれば、従来必要とされていた図８に示す行ドライバ素子１２ａ〜１２ｈが不要となり、その分部品コストを削減できる。なお、列ドライバ素子を一つとして、その列ドライバ素子により図示しない切替回路を介して発光素子群Ｘ１〜Ｘ４を所定の順序にしたがって択一的に駆動してもよい。   According to this embodiment, the row driver elements 12a to 12h shown in FIG. 8 which are conventionally required are not required, and the part cost can be reduced correspondingly. Note that the light emitting element groups X1 to X4 may be alternatively driven according to a predetermined order by using a single column driver element via a switching circuit (not shown).

受光部２０Ａでは３２個の受光素子ＰＤが、それぞれ４個として第１ないし第８の８行の受光素子群Ｙ１〜Ｙ８４に群分けされている。なお、説明上各受光素子群を区別する必要がない場合には、単に受光素子群Ｙという。   In the light receiving unit 20A, 32 light receiving elements PD are grouped into four light receiving element groups Y1 to Y84 in the first to eighth rows. In addition, when it is not necessary to distinguish each light receiving element group for description, it is simply referred to as a light receiving element group Y.

すなわち、第１行目の第１受光素子群Ｙ１には受光素子ＰＤ１１，ＰＤ２１，ＰＤ３１，ＰＤ４１が含まれ、第２行目の第２受光素子群Ｙ２には受光素子ＰＤ１２，ＰＤ２２，ＰＤ３２，ＰＤ４２が含まれ、第３行目の第３受光素子群Ｙ３には受光素子ＰＤ１３，ＰＤ２３，ＰＤ３３，ＰＤ４３が含まれ、第４行目の第４受光素子群Ｙ４には受光素子ＰＤ１４，ＰＤ２４，ＰＤ３４，ＰＤ４４が含まれている。   That is, the first light receiving element group Y1 in the first row includes the light receiving elements PD11, PD21, PD31, and PD41, and the second light receiving element group Y2 in the second row includes the light receiving elements PD12, PD22, PD32, and PD42. The third light receiving element group Y3 in the third row includes light receiving elements PD13, PD23, PD33, and PD43, and the fourth light receiving element group Y4 in the fourth row includes the light receiving elements PD14, PD24, and PD34. , PD44.

また、第５行目の第５受光素子群Ｙ５には受光素子ＰＤ１５，ＰＤ２５，ＰＤ３５，ＰＤ４５が含まれ、第６行目の第６受光素子群Ｙ６には受光素子ＰＤ１６，ＰＤ２６，ＰＤ３６，ＰＤ４６が含まれ、第７行目の第７受光素子群Ｙ３には受光素子ＰＤ１７，ＰＤ２７，ＰＤ３７，ＰＤ４７が含まれ、第８行目の第８受光素子群Ｙ８には受光素子ＰＤ１８，ＰＤ２８，ＰＤ３８，ＰＤ４８が含まれている。   The fifth light receiving element group Y5 in the fifth row includes light receiving elements PD15, PD25, PD35, and PD45, and the sixth light receiving element group Y6 in the sixth row includes the light receiving elements PD16, PD26, PD36, and PD46. The seventh light receiving element group Y3 in the seventh row includes light receiving elements PD17, PD27, PD37, and PD47, and the eighth light receiving element group Y8 in the eighth row includes the light receiving elements PD18, PD28, and PD38. , PD48 is included.

各受光素子群Ｙに含まれる４個の受光素子ＰＤは、それらの出力が加算されるように接続され、受光素子群Ｙ１〜Ｙ８の各々が選択回路２１に接続される。選択回路２１にて選択された一つの受光素子群Ｙの出力（加算出力）が例えば増幅器２２を介して制御部２３に与えられる。制御部２３は、受光素子群Ｙの出力レベル（受光レベル）を監視し、そのレベル変動に応じて自動ドア１に開閉信号を出力する。   The four light receiving elements PD included in each light receiving element group Y are connected so that their outputs are added, and each of the light receiving element groups Y1 to Y8 is connected to the selection circuit 21. The output (addition output) of one light receiving element group Y selected by the selection circuit 21 is given to the control unit 23 via the amplifier 22, for example. The control unit 23 monitors the output level (light reception level) of the light receiving element group Y, and outputs an open / close signal to the automatic door 1 according to the level fluctuation.

選択回路２１には、例えばアナログスイッチからなるマルチプレクサが用いられてよく、その切替順序および切替タイミングは制御部２３にて制御される。また、発光駆動部１１の切替順序および切替タイミングも制御部２３により制御される。なお、従来では選択回路２１に３２入力必要であったところ、この実施形態によれば８入力あればよく、選択回路２１に安価なデバイスを使用することができる。   For example, a multiplexer composed of an analog switch may be used for the selection circuit 21, and its switching order and switching timing are controlled by the control unit 23. The switching order and switching timing of the light emission driving unit 11 are also controlled by the control unit 23. Conventionally, 32 inputs are required for the selection circuit 21, but according to this embodiment, 8 inputs are sufficient, and an inexpensive device can be used for the selection circuit 21.

本発明の動作の一例を説明すると、まず、列ドライバ素子１１ａにより第１列目の第１発光素子群Ｘ１の発光素子ＬＤ１１〜ＬＤ１８を同時に発光させておき、選択回路２１にて受光素子群Ｙ１〜Ｙ８の出力を例えばＹ１→Ｙ２→Ｙ３→Ｙ４→Ｙ５→Ｙ６→Ｙ７→Ｙ８の順で選択する。これにより、図２の各スポット光ＳＰのうちの第１列目のスポット光のみがＳＰ１１→ＳＰ１２→ＳＰ１３→ＳＰ１４→ＳＰ１５→ＳＰ１６→ＳＰ１７→ＳＰ１８の順で有効（アクティブ状態）となる。   An example of the operation of the present invention will be described. First, the light emitting elements LD11 to LD18 of the first light emitting element group X1 in the first column are caused to emit light simultaneously by the column driver element 11a, and the light receiving element group Y1 is selected by the selection circuit 21. To Y8 are selected in the order of, for example, Y1, Y2, Y3, Y4, Y5, Y6, Y7, and Y8. As a result, only the spot light in the first column among the spot lights SP in FIG. 2 becomes valid (active state) in the order of SP11 → SP12 → SP13 → SP14 → SP15 → SP16 → SP17 → SP18.

第１列目の走査を終えたら、次に列ドライバ素子１１ｂにより第２列目の第２発光素子群Ｘ２の発光素子ＬＤ２１〜ＬＤ２８を同時に発光させておき、選択回路２１にて受光素子群Ｙ１〜Ｙ８の出力を例えばＹ１→Ｙ２→Ｙ３→Ｙ４→Ｙ５→Ｙ６→Ｙ７→Ｙ８の順で選択する。これにより、図２の各スポット光ＳＰのうちの第２列目のスポット光のみがＳＰ２１→ＳＰ２２→ＳＰ２３→ＳＰ２４→ＳＰ２５→ＳＰ２６→ＳＰ２７→ＳＰ２８の順で有効となる。これを繰り返すことにより、アクティブスポットを走査することが可能となる。   When the scanning of the first column is completed, the light emitting elements LD21 to LD28 of the second light emitting element group X2 of the second column are caused to emit light simultaneously by the column driver element 11b, and the light receiving element group Y1 is selected by the selection circuit 21. To Y8 are selected in the order of, for example, Y1, Y2, Y3, Y4, Y5, Y6, Y7, and Y8. As a result, only the spot light in the second column among the spot lights SP in FIG. 2 becomes effective in the order of SP21 → SP22 → SP23 → SP24 → SP25 → SP26 → SP27 → SP28. By repeating this, the active spot can be scanned.

なお、発光部１０Ａの発光素子群を行ラインに沿って群分けし、受光部２０Ａの受光素子群を列ラインに沿って群分けしてもよい。また、発光素子群Ｘの切替順序および受光素子群Ｙの切替順序をランダムとしてもよい。   The light emitting element group of the light emitting unit 10A may be grouped along the row line, and the light receiving element group of the light receiving unit 20A may be grouped along the column line. The switching order of the light emitting element group X and the switching order of the light receiving element group Y may be random.

上記のようにして、図２に示すように、先に説明した図７と同じく自動ドア１の近傍の床面にドアの移動方向と平行な複数の監視列，この例においても第１ないし第４の監視列ＷＬ１〜ＷＬ４が生成されるが、次に、このうちのドア側の第１監視列ＷＬ１をドアウェイＤＷ上に設定してドアウェイ監視列とし、残りの第２ないし第４監視列ＷＬ２〜ＷＬ４を通常監視列とする場合について説明する。   As described above, as shown in FIG. 2, a plurality of monitoring rows parallel to the moving direction of the door on the floor surface in the vicinity of the automatic door 1 as in FIG. Four monitoring columns WL1 to WL4 are generated. Next, the first monitoring column WL1 on the door side is set on the doorway DW to be the doorway monitoring column, and the remaining second to fourth monitoring columns WL2 are set. A case where .about.WL4 is set as a normal monitoring column will be described.

本発明において、制御部２３は、ドアウェイ監視列ＷＬ１をドアウェイＤＷの部分に設定する際に用いられる調整モードと、ドアウェイ監視列ＤＷ１および通常監視列ＷＬ２〜ＷＬ４を含めてすべての監視列を有効（アクティブ状態）とする運用モードとを備えている。   In the present invention, the control unit 23 validates all the monitoring columns including the adjustment mode used when setting the doorway monitoring column WL1 in the doorway DW portion, and the doorway monitoring column DW1 and the normal monitoring columns WL2 to WL4 ( Active mode).

制御部２３は、調整モードが選択されると、列ドライバ素子１１ｂのみをオンとし、列ドライバ素子１１ａ，１１ｃ，１１ｄはオフとする。これにより、図３（ａ）に示すように、ドアウェイ監視列ＤＷ１に隣接する第２列目（通常監視列内の最内列である第１列目）の通常監視列ＷＬ２のみが有効になる。なお、先に説明した図８（ａ）の駆動回路により通常監視列ＷＬ２のみを有効としてもよい。   When the adjustment mode is selected, the control unit 23 turns on only the column driver element 11b and turns off the column driver elements 11a, 11c, and 11d. Thereby, as shown in FIG. 3A, only the normal monitoring column WL2 of the second column (the first column which is the innermost column in the normal monitoring column) adjacent to the doorway monitoring column DW1 is enabled. . Note that only the normal monitoring column WL2 may be validated by the drive circuit shown in FIG.

これにより、作業者は、図示しない赤外線検知器を用いて通常監視列ＷＬ２に含まれるスポット光ＳＰ２１〜ＳＰ２８を検出しながら、発光部１０Ａおよび受光部２０Ａの傾きなどを調整して、通常監視列ＷＬ２をドアの移動を検知しない位置に設定することができる。このとき、ドアウェイ監視列ＤＷ１はドアの移動を検知できる位置であれば、ドアウェイＤＷから多少ずれてもかまわない。   Thereby, the operator adjusts the inclination of the light emitting unit 10A and the light receiving unit 20A while detecting the spot lights SP21 to SP28 included in the normal monitoring column WL2 by using an infrared detector (not shown), and thereby the normal monitoring column. WL2 can be set to a position where the movement of the door is not detected. At this time, the doorway monitoring line DW1 may be slightly deviated from the doorway DW as long as the movement of the door can be detected.

調整終了後、運用モードに復帰されると、制御部２３は、列ドライバ素子１１ａ〜１１ｄを上記したように所定の順序にしたがって切り替える。これにより、図３（ｂ）に示すように、ドアウェイ監視列ＷＬ１および通常監視列ＷＬ２〜ＷＬ４が物体を検知するアクティブ状態となるが、通常監視列ＷＬ２がドアの移動を検知することがないため、チャタリング現象が起こることはない。   After the adjustment is completed, when the operation mode is restored, the control unit 23 switches the column driver elements 11a to 11d according to a predetermined order as described above. As a result, as shown in FIG. 3B, the doorway monitoring row WL1 and the normal monitoring rows WL2 to WL4 are in an active state for detecting an object, but the normal monitoring row WL2 does not detect the movement of the door. No chattering occurs.

なお、制御部２３は、調整モード時に報知手段としての例えばセンサのハウジングに設けられた発光ダイオードを点滅して、作業者に調整モードであることを明示的に知らしめるが、それでも調整終了後に運用モードに設定し忘れることがある。   Note that the control unit 23 blinks a light emitting diode provided, for example, in the sensor housing as the notification means in the adjustment mode to explicitly notify the operator that the adjustment mode is in effect, but still operates after the adjustment is completed. You may forget to set the mode.

そこで、本発明では、調整モードとしてから自動ドアの開閉回数をカウントし、そのカウント数が所定回数（例えば２０回）に達した時点で、自動的に調整モードから運用モードに切り替えるようにしている。   Therefore, in the present invention, the number of times of opening and closing the automatic door is counted after entering the adjustment mode, and when the count reaches a predetermined number (for example, 20 times), the adjustment mode is automatically switched to the operation mode. .

これとは別に、調整モードとしてから所定時間経過後（例えば３０分経過後）に、自動的に調整モードから運用モードに切り替えるようにしてもよい。   Alternatively, the adjustment mode may be automatically switched to the operation mode after a predetermined time has elapsed (for example, after 30 minutes have elapsed) since the adjustment mode was set.

また、通常監視列ＷＬ２に含まれるスポット光ＳＰ２１〜ＳＰ２８の検出に赤外線検知器ではなく、赤外線が照射された際に可視光を発生させるカード状のフォスファを用いることが好ましく、これによれば簡便にスポット光ＳＰを検出することができる。この種のフォスファとしては、例えばＬｕｍｉｔｅｋ社の商品名ＩＲセンサカードを例示することができる。   In addition, it is preferable to use a card-like phosphor that generates visible light when irradiated with infrared rays, instead of an infrared detector, for detecting the spot lights SP21 to SP28 included in the normal monitoring row WL2. It is possible to detect the spot light SP. As this type of phosphor, for example, a trade name IR sensor card of Lumitek can be exemplified.

本発明による自動ドア用反射型センサが備える，（ａ）発光部側の構成例を示す模式的な平面図，（ｂ）受光部側の構成例を示す模式的な平面図。FIG. 2A is a schematic plan view showing a configuration example on the light emitting unit side, and FIG. 2B is a schematic plan view showing a configuration example on the light receiving unit side, provided in the reflective sensor for automatic doors according to the present invention. 上記自動ドア用反射型センサにより床面に生成される多列のアクティブスポットを示す模式図。The schematic diagram which shows the multi-row active spot produced | generated on a floor surface by the said reflection type sensor for automatic doors. 本発明により、ドアウェイに沿ってドアウェイ監視列を設定する状態を示す模式図。The schematic diagram which shows the state which sets a doorway monitoring row | line | column along a doorway by this invention. 従来の自動ドア用反射型センサが備える，（ａ）発光部側の基本的な構成例を示す模式図，（ｂ）受光部側の基本的な構成例を示す模式図。The schematic diagram which shows the basic structural example by which the conventional reflection type sensor for automatic doors is equipped, (a) The basic structural example by the side of a light-emitting part, (b). 図４の発光部と受光部とにより床面に生成される一列のアクティブスポットを示す模式図。The schematic diagram which shows the active spot of 1 row produced | generated on a floor surface by the light emission part and light-receiving part of FIG. 従来の自動ドア用反射型センサが備える，（ａ）発光部側の実際的な構成例を示す模式図，（ｂ）受光部側の実際的な構成例を示す模式図。The schematic diagram which shows the actual structural example by the side of the light-receiving part which (a) the light-emitting part side has with the conventional reflective type sensor for automatic doors. 図６の発光部と受光部とにより床面に生成される多列のアクティブスポットを示す模式図。The schematic diagram which shows the multi-row active spot produced | generated on a floor surface by the light emission part of FIG. 6, and a light-receiving part. （ａ）図６の発光部側の発光駆動部の構成例を示す模式図，（ｂ）図６の受光部側の回路構成例を示す模式図。FIG. 7A is a schematic diagram illustrating a configuration example of a light emission driving unit on the light emitting unit side in FIG. 6, and FIG. 7B is a schematic diagram illustrating a circuit configuration example on the light receiving unit side in FIG. 6. 従来自動ドア用反射型センサにおいて、ドアウェイに沿ってドアウェイ監視列を設定する状態を示す模式図。The schematic diagram which shows the state which sets the doorway monitoring row | line | column along the doorway in the reflection type sensor for conventional automatic doors.

符号の説明Explanation of symbols

１ 自動ドア
１０Ａ 発光部
１１ 発光駆動部
１１ａ〜１１ｄ 列ドライバ素子
２０Ａ 受光部
２１ 選択回路
２３ 制御部
ＬＤ 発光素子
ＰＤ 受光素子
Ｘ 発光素子群
Ｙ 受光素子群
ＷＬ１ ドアウェイ監視列
ＷＬ２〜ＷＬ４ 通常監視列 DESCRIPTION OF SYMBOLS 1 Automatic door 10A Light emission part 11 Light emission drive part 11a-11d Column driver element 20A Light receiving part 21 Selection circuit 23 Control part LD Light emitting element PD Light receiving element X Light emitting element group Y Light receiving element group WL1 Doorway monitoring line WL2-WL4 Normal monitoring line

Claims (4)

マトリクス状に配列された複数の発光素子を有する発光部と、上記複数の発光素子と対応してマトリクス状に配列された複数の受光素子を有し、上記発光部とともに自動ドアの上部空間に配置される受光部と、上記受光部から出力される受光信号のレベルに応じて上記自動ドアに開閉信号を出力するとともに、上記発光部と上記受光部とを制御する制御部とを含み、上記発光部の各発光素子から上記自動ドア近傍の床面にドアウェイの部分を含めてスポット光をマトリクス状に照射してドアの移動方向と平行な複数の監視列を設定し、その監視列単位で物体の有無を検知する自動ドア用反射型センサにおいて、
上記ドアウェイの部分に設定される監視列を特定用途のドアウェイ監視列とし、その他の監視列をドア起動用の通常監視列として、
上記制御部は、上記ドアウェイ監視列を上記ドアウェイの部分に設定する際に用いられる調整モードと、上記ドアウェイ監視列および上記通常監視列を含めてすべての監視列を有効とする運用モードとを備え、
上記調整モード時には、上記ドアウェイ監視列に直近として隣接する通常監視列のみを有効とすることを特徴とする自動ドア用反射型センサ。 A light-emitting unit having a plurality of light-emitting elements arranged in a matrix and a plurality of light-receiving elements arranged in a matrix corresponding to the plurality of light-emitting elements are arranged in the upper space of the automatic door together with the light-emitting units. A light-receiving unit that outputs an opening / closing signal to the automatic door according to a level of a light-receiving signal output from the light-receiving unit, and a controller that controls the light-emitting unit and the light-receiving unit. A plurality of monitoring columns parallel to the moving direction of the door are set by irradiating the spot light including the doorway portion on the floor surface near the automatic door from each light emitting element of the unit in a matrix form, and the object is in units of the monitoring column In the reflective sensor for automatic doors that detects the presence or absence of
The monitoring column set in the doorway part is a doorway monitoring column for specific use, and the other monitoring columns are normal monitoring columns for door activation.
The control unit includes an adjustment mode used when setting the doorway monitoring column to the doorway part, and an operation mode in which all monitoring columns including the doorway monitoring column and the normal monitoring column are enabled. ,
In the adjustment mode, a reflection sensor for automatic doors, wherein only the normal monitoring row adjacent to the doorway monitoring row is made effective immediately. 上記制御部は、上記調整モード時に所定の報知手段により調整モードであることを報知することを特徴とする請求項１に記載の自動ドア用反射型センサ。   2. The reflective sensor for an automatic door according to claim 1, wherein the control unit notifies the adjustment mode by a predetermined notification unit during the adjustment mode. 上記制御部は、上記調整モードとしてから上記自動ドアの開閉数を計数し、その開閉数が所定回数に達した時点で、上記調整モードから上記運用モードに切り替えることを特徴とする請求項１または２に記載の自動ドア用反射型センサ。   The control unit counts the number of opening / closing of the automatic door after entering the adjustment mode, and switches from the adjustment mode to the operation mode when the number of opening / closing reaches a predetermined number. The reflective sensor for automatic doors according to 2. 上記制御部は、上記調整モードとしてから所定時間経過後に、上記調整モードから上記運用モードに切り替えることを特徴とする請求項１または２に記載の自動ドア用反射型センサ。
The automatic door reflective sensor according to claim 1, wherein the control unit switches from the adjustment mode to the operation mode after a lapse of a predetermined time from the adjustment mode.
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JP2015017990A (en) * 2010-03-17 2015-01-29 旭光電機株式会社 Object detection device
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2477002A (en) * 2009-11-05 2011-07-20 Itshak Allen Security apparatus for a window or door
JP2015017990A (en) * 2010-03-17 2015-01-29 旭光電機株式会社 Object detection device
WO2012073821A1 (en) 2010-12-03 2012-06-07 ナブテスコ株式会社 Sensor for automatic door
US8955253B2 (en) 2010-12-03 2015-02-17 Nabtesco Corporation Sensor for use with automatic door
WO2018043509A1 (en) * 2016-08-29 2018-03-08 ナブテスコ株式会社 Sensor detection area adjusting system, automatic door sensor, marker, and sensor detection area adjusting method
CN109313282A (en) * 2016-08-29 2019-02-05 纳博特斯克有限公司 The search coverage of sensor adjusts system, the search coverage method of adjustment of automatic door sensor, label and sensor
JPWO2018043509A1 (en) * 2016-08-29 2019-06-24 ナブテスコ株式会社 Sensor detection area adjustment system, automatic door sensor, marker and sensor detection area adjustment method
JPWO2021199887A1 (en) * 2020-03-31 2021-10-07
WO2021199887A1 (en) * 2020-03-31 2021-10-07 ナブテスコ株式会社 Automatic door system, sensor setting assistance device, sensor, setting assistance system, sensor system, sensor setting assistance method, and sensor setting assistance program
JP7288142B2 (en) 2020-03-31 2023-06-06 ナブテスコ株式会社 Automatic door system, sensor setting support device, sensor, setting support system, sensor system, sensor setting support method, and sensor setting support program

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