JP2627514B2 - Multi-beam type surface detection switch - Google Patents
Multi-beam type surface detection switchInfo
- Publication number
- JP2627514B2 JP2627514B2 JP62291191A JP29119187A JP2627514B2 JP 2627514 B2 JP2627514 B2 JP 2627514B2 JP 62291191 A JP62291191 A JP 62291191A JP 29119187 A JP29119187 A JP 29119187A JP 2627514 B2 JP2627514 B2 JP 2627514B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- projector
- receiver
- turned
- timer
- 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.)
- Expired - Lifetime
Links
Description
【発明の詳細な説明】 ＜産業上の利用分野＞ この発明は、複数の投光器と受光器をそれぞれ検知エ
リアの両側に対向して配置し、複数本の投光光線によっ
て検知エリアに物体が存在することを検知できるように
した多光線式面検知スイッチに関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention arranges a plurality of light emitters and light receivers on both sides of a detection area, respectively, and an object exists in the detection area by a plurality of light beams. The present invention relates to a multi-beam type surface detection switch capable of detecting the operation.
＜従来技術＞ 従来、上記の多光線式面検知スイッチとしては、例え
ば第４図に示すようなものがあった。これは、検知エリ
ア１の一側に複数の投光器2a〜2dを列設し、各投光器2a
〜2dからの投光光線を受光できるように検知エリア１の
他側に複数の受光器3a〜3dを列設したもので、投光器2a
が投光状態のとき、受光器3aを受光状態に、投光器2bが
投光状態のとき、受光器3bを受光状態に、投光器2cが投
光状態のとき、受光器3cを受光状態に、投光器2dが投光
状態のとき、受光器3dを受光状態に、それぞれするもの
である（特開昭61−241670号公報）。即ち、動作状態に
なる投光器及び受光器を時分割的に切り換えている。<Prior Art> Conventionally, as the above-mentioned multi-beam type surface detection switch, for example, there is a switch as shown in FIG. This is because a plurality of light emitters 2a to 2d are arranged in a row on one side of the detection area 1, and each light emitter 2a
A plurality of light receivers 3a to 3d are arranged in a row on the other side of the detection area 1 so as to be able to receive light beams emitted from the light projector 2a.
When the light is in the light emitting state, the light receiver 3a is in the light receiving state, when the light emitter 2b is in the light emitting state, the light receiver 3b is in the light receiving state, and when the light emitter 2c is in the light emitting state, the light receiver 3c is in the light receiving state. When 2d is in the light emitting state, the light receiver 3d is set to the light receiving state (JP-A-61-241670). That is, the light-emitting device and the light-receiving device that are in the operating state are switched in a time-division manner.
〈発明が解決しようとする問題点〉 このような面検知スイッチでは、動作状態にある投光
器と受光器との間に、物体が存在していると、この物体
を検知できる。しかし、物体が移動する場合に問題が生
じる。例えば、投光器2a、受光器3aが動作状態におい
て、これらの間にあった物体が、第４図における上方に
移動し、再び投光器2a、受光器3aの間に入った場合、再
び投光器2a、受光器3aの間に入ったことは、投光器2a、
受光器3aが再び動作状態になるまで検知されない。従っ
て、物体が検知されていないことを条件として動作させ
る機器、例えば人の手が内部に入っていないことを条件
として動作させるプレス機器等には、危険で使用できな
いという問題点があった。<Problems to be Solved by the Invention> With such a surface detection switch, if an object exists between the projector and the light receiver in the operating state, the object can be detected. However, a problem arises when the object moves. For example, when the projector 2a and the light receiver 3a are in the operating state and the object between them moves upward in FIG. 4 and enters again between the light projector 2a and the light receiver 3a, the light projector 2a and the light receiver 3a The thing that entered between is the floodlight 2a,
No detection is made until the light receiver 3a is again in the operating state. Therefore, there is a problem that a device that operates on the condition that an object is not detected, for example, a press device that operates on the condition that a human hand does not enter the inside is dangerous and cannot be used.
〈問題点を解決するための手段〉 この発明は、複数の投光器及び受光器を時分割的に切
り換えても、物体が存在していないことを確実に検知で
きる面検知スイッチを提供することを目的とする。<Means for Solving the Problems> An object of the present invention is to provide a surface detection switch that can reliably detect the absence of an object even when a plurality of light emitters and light receivers are switched in a time-division manner. And
この目的を達成するために、本発明は、検知エリアを
挟んで一側に列設され、作動状態において上記検知エリ
アに投光する複数の投光器と、これら投光器にそれぞれ
対応して上記検知エリアの他側に配置され、作動状態に
おいて対応する上記投光器からの投光光線が遮断された
とき、検知信号を生成する複数の受光器と、上記各投光
器及び上記各受光器のうち対応するものを、順に上記作
動状態に切り換えることを繰り返す切換手段と、上記各
受光器のうちいずれかが上記検知信号を出力したのに応
動して、動作を開始し、その動作している状態を、上記
検知信号を出力した上記受光器及びこれに対応する上記
投光器が再び上記作動状態になるまでのループ１周分の
期間にわたって継続し、上記ループ１周分の期間中に検
知信号が供給されると、その供給時点から上記ループ１
周分の期間にわたる上記動作を再開始するタイマ手段と
を、具備するものである。In order to achieve this object, the present invention provides a plurality of light emitters arranged in a row on one side of a detection area and projecting light to the detection area in an operation state, and Arranged on the other side, a plurality of light receivers that generate a detection signal when a light beam emitted from the corresponding light emitter in the operating state is interrupted, and a corresponding one of the light emitters and the light receivers, Switching means for repeating switching to the operation state in order, and in response to one of the light receivers outputting the detection signal, starting operation and changing the operating state to the detection signal. Continues for a period of one loop until the light receiver and the corresponding light emitter that output the signal again enter the operation state, and a detection signal is supplied during the period of one loop. The loop 1 from the feed point
Timer means for restarting the above-mentioned operation over a period of the circumference.
〈作用〉 この発明によれば、対応する投光器と受光器とは、切
換手段によって順に作動状態とされることが繰り返され
る。いずれかの受光器が作動状態において、検知信号を
発生すると、タイマ手段が動作を開始する。このタイマ
が動作している状態は、ループ１周分の期間継続する。
このループ１周分の期間中に、他の受光器が検知信号を
発生することがある。このとき、タイマ手段は、この検
知信号の発生時点からループ１周分の時間にわたる動作
を再開始する。<Function> According to the present invention, the corresponding light emitter and light receiver are sequentially turned on by the switching means. When a detection signal is generated while any of the light receivers is in operation, the timer means starts operating. The state in which this timer is operating continues for a period of one loop.
During this one round of the loop, another light receiver may generate a detection signal. At this time, the timer restarts the operation for the time corresponding to one round of the loop from the time when the detection signal is generated.
＜実施例＞ 以下、この発明を第１図〜第３図に示す１実施例に基
づいて詳細に説明する。第１図において、10は検知エリ
アで、この検知エリアの一側には、所定の間隔を隔てて
投光器P1〜P4をそれぞれ配置しており、また、検知エリ
ア10の他側には、各投光器P1〜P4とそれぞれ対応するよ
うに受光器R1〜R4を配置している。<Embodiment> Hereinafter, the present invention will be described in detail based on one embodiment shown in FIGS. 1 to 3. In Figure 1, 10 denotes a detection area, in the one side of the detection area, has arranged a projector P 1 to P 4 at a prescribed interval, also on the other side of the detection area 10, It is arranged light receiver R 1 to R 4 so as to correspond to each to each projector P 1 to P 4.
各投光器P1〜P4は、投光用発振周波数回路12から投光
器切換スイッチ14を介して供給されるパルス信号によっ
てパルス変調された投光光線を、各投光器P1〜P4の前方
にそれぞれ設けたレンズ16を介して検知エリア10に向け
て投光し、これら投光光線は第１図に矢印で示すように
検知エリア10を通り各受光器R1〜R4の前方にそれぞれ設
けたレンズ18を介して各受光器R1〜R4に受光される。Each of the light emitters P 1 to P 4 emits a light beam pulse-modulated by a pulse signal supplied from the oscillation frequency circuit for light emission 12 through the light emission selector switch 14 in front of each of the light emitters P 1 to P 4. through a lens 16 provided with projecting light toward the detection area 10, these projection rays are provided respectively in front of the detection areas 10 each photodetector through R 1 to R 4 as indicated by the arrows in FIG. 1 The light is received by each of the light receivers R 1 to R 4 via the lens 18.
各受光器R1〜R4は、投光光線を受けると受光信号を生
成するが、これら受光信号は受光器切換スイッチ20を介
して受光信号増幅回路22に供給される。この受光信号増
幅回路22は、受光信号が消失したとき、タイマ24をセッ
トする。このタイマ24は、セットされたときから、予め
定めた時限にわたってリレー26をオンさせるもので、た
とえ上記の予め定めた時限に達する前に再びセットされ
ると、その時点から上記の時限にわたってリレー26をオ
ンさせるものである。なお、リレー26は、タイマ24の作
動中、その接点28を閉成するように構成されている。Each of the light receivers R 1 to R 4 generates a light reception signal when receiving a light beam. These light reception signals are supplied to a light reception signal amplifier circuit 22 via a light receiver changeover switch 20. The light receiving signal amplifying circuit 22 sets a timer 24 when the light receiving signal disappears. The timer 24 turns on the relay 26 for a predetermined time period from when it is set.If the timer 24 is set again before the predetermined time period is reached, the relay 26 is turned on from that point on for the time period. Is turned on. The relay 26 is configured to close the contact 28 while the timer 24 is operating.
投光器切換スイッチ14及び受光器切換スイッチ20の切
換は、切換信号発生回路30によって、投光器P1が投光し
ているときには、受光器R1のみが受光可能状態にあり、
投光器P2が投光しているときには、受光器R2が受光可能
状態にあり、投光器P3が投光しているときには受光器R3
が受光可能状態にあり、投光器P4が投光しているときに
は、受光器R4が受光可能状態にあることを、周期的に繰
返すように、投光器切換信号と受光器切換信号とを投光
器切換スイッチ14及び受光器切換スイッチ20に供給す
る。Switching of the projector changeover switch 14 and the light receiver change-over switch 20, the switching signal generating circuit 30, when the projector P 1 is projected, only the light receiver R 1 is in the receiving state,
When projector P 2 is projected, the optical receiver has R 2 are the light-receiving state, when the projector P 3 is projected in the light receiver R 3
There is in receiving state, when the projector P 4 is projected, the light receiver that R 4 is in a receiving state, as periodically repeating, projector switching the light projector switching signal and the light receiver switching signal This is supplied to the switch 14 and the light receiver changeover switch 20.
なお、32は、投光用発振周波数回路12及び投光器切換
スイッチ14に対する電源、34は受光器切換スイッチ20、
切換信号発生回路30、受光信号増幅回路22及びタイマ24
及びリレー26に対する電源である。また、投光用周波数
発振回路12、投光器切換スイッチ14、受光器切換スイッ
チ20、切換信号発生回路30、受光信号増幅回路22等は、
ディジタルICによってそれぞれ構成されている。In addition, 32 is a power supply for the oscillation frequency circuit 12 for light emission and the light emitter changeover switch 14, 34 is a light receiver changeover switch 20,
Switching signal generating circuit 30, light receiving signal amplifying circuit 22, and timer 24
And a power source for the relay 26. Also, the light emitting frequency oscillation circuit 12, the light emitting device changeover switch 14, the light receiving device changeover switch 20, the switching signal generating circuit 30, the light receiving signal amplifying circuit 22, etc.
Each is constituted by a digital IC.
次に、第２図に示す動作フロー及び第３図に示す動作
状態図を参照しながら、この面検知スイッチの動作につ
いて説明する。まず、切換信号発生回路30が投光器切換
スイッチ14に投光器切換信号を供給し、投光用発振周波
数回路12からパルス信号を投光器P1に供給し、投光器P1
から投光光線を検知エリア10に向って投光し、同時に切
換信号発生回路30は受光切換信号を受光器切換スイッチ
20に供給し、受光器R1を受光可能状態とする。即ち、投
光器P1及び受光器R1を共にオンとする（ステップS2）。
このとき、投光器P1からの投光光線が物体によって遮断
されていないと、第３図（ａ）に示すように、この投光
光線は受光器R1に到達し、受光器R1は受光信号を発生
し、この受光信号は受光器切換スイッチ20を介して受光
信号増幅回路22に供給される。即ち、投光光線が遮断さ
れたかの判断がなされるが（ステップS4）、この判断結
果がNOであるので、タイマ24はオフのままで、リレー26
の接点28は開放状態を維持する（ステップS6の注）。Next, the operation of the surface detection switch will be described with reference to the operation flow shown in FIG. 2 and the operation state diagram shown in FIG. First, the switching signal generating circuit 30 supplies the projector switching signal projector changeover switch 14, is supplied from the light oscillation frequency circuit 12 a pulse signal to the projector P 1, projector P 1
The light is projected toward the detection area 10 at the same time, and at the same time, the switching signal generation circuit 30
Is supplied to 20 and the light receiver R 1 and a light-receiving state. That, together with on the projector P 1 and the light receiver R 1 (step S2).
At this time, the projection light from the projector P 1 is not blocked by an object, as shown in FIG. 3 (a), the projection light beam reaches the light receiver R 1, photodetector R 1 is receiving A signal is generated, and this light receiving signal is supplied to a light receiving signal amplifying circuit 22 via a light receiving device changeover switch 20. That is, it is determined whether or not the emitted light beam has been interrupted (step S4). However, since the determination result is NO, the timer 24 remains off and the relay 26 is turned off.
Contact 28 is kept open (note of step S6).
次に、切換信号発生回路30が発生する投光器切換信号
及び受光器切換信号が変化し、投光器P1は投光を中止す
ると共に、受光器R1が受光可能状態でなくなる。即ち、
投光器P1及び受光器R1がオフとなる（ステップS8）。こ
れに続いて投光器P2と受光器R2がオンとなる（ステップ
S10）。このとき、投光器P2からの投光光線が物体で遮
断されないと、第３図（ｂ）に示すように受光器R2に到
達し、上記と同様にタイマ24はセットされず、リレー26
もオンしない（ステップS12、S14の注）。Next, change the projector switching signal and the light receiver switching signal switching signal generating circuit 30 generates, projector P 1 along with stops the light projection, the light receiver R 1 is no longer receiving state. That is,
Projector P 1 and the light receiver R 1 is turned off (step S8). Projector P 2 and the light receiver R 2 is turned Following this (step
S10). At this time, the projection light from the projector P 2 is not blocked by an object and reaches the light receiver R 2 as shown in FIG. 3 (b), the timer 24 in the same manner as described above is not set, the relay 26
Is also not turned on (note of steps S12 and S14).
以下同様に、投光器P2及び受光器R2がオフとなり、投
光器P3及び受光器R3がオンとなり（ステップS16、1
8）、物体によって投光器P3の投光光線が遮断されてい
ないと第３図（ｃ）に示すように投光器P3の投光光線が
受光器R3で受光され、タイマ24はセットされず、リレー
26もオンしない（ステップS20、S22の注）。これに続い
て、投光器P3及び受光器R2がオフとなり、投光器P4及び
受光器R4がオンとなり（ステップS24、26）、投光器P4
の投光光線が物体に遮断されていないと、第３図（ｄ）
に示すように投光器P4の投光光線が受光器R4で受光され
る。従って、タイマ24はセットされず、リレー26もオン
しない（ステップS28、S30の注）。そして、投光器P4及
び受光器R4がオフされ（ステップS32）、再び投光器P1
及び受光器R1がオンとなり、以下上述した動作を繰返
す。Hereinafter Similarly, projector P 2 and the light receiver R 2 is turned off, the projector P 3 and the light receiver R 3 is turned on (step S16,1
8), the object light projection beam of projector P 3 as shown in Figure 3 the projection beam of projector P 3 is not interrupted (c) is received by the light receiver R 3 by, the timer 24 is not set ,relay
26 is also not turned on (note of steps S20 and S22). Following this, the projector P 3 and the light receiver R 2 is turned off, projector P 4 and the light receiver R 4 is turned on (step S24,26), projector P 4
FIG. 3D shows that the projected light beam is not blocked by the object.
Projecting light projectors P 4 is received by the photodetector R 4 as shown in FIG. Therefore, the timer 24 is not set, and the relay 26 is not turned on (note of steps S28 and S30). The projector P 4 and the light receiver R 4 is turned off (step S32), projector P 1 again
And the light receiver R 1 is turned on, the above-described operation is repeated hereinafter.
例えば、検知エリア10内の物体によって投光器P1の投
光光線のみが遮断されると、受光器R1には投光光線が到
達せず、受光信号増幅回路22には、受光信号は供給され
ず、受光信号増幅回路22は、タイマ24をセットし、タイ
マ24はリレー26をオンさせ、その接点28を閉成する（ス
テップS34、36）。このとき、作動している投光器と受
光器は、投光器P1及び受光器R1のみであるので、誤って
他の投光器P2〜P4からの投光光線が受光器R1で受光され
て、誤検知することはない。また、タイマ24の時限は、
各投光器P1〜P4及び受光器R1〜R4がそれぞれオンとされ
てから再びオンとなる迄に要する時間、即ち、Ａループ
１周に要する時間に設定されている。従って、再び投光
器P1及び受光器R1がオンとなるまでに、物体が投光器P1
及び受光器R1の間から出て、再び両者の間に入っても、
リレー26はオフとなることなく、オン状態を維持してい
る。また、再び投光器P1及び受光器R1がオンとなったと
き、物体が投光器P1の投光光線を遮断していないと、即
ち投光器P1及び受光器R1の間から物体が出てしまってい
ると、タイマ24はオフとなり、リレー26もオフとなり、
その接点28は開放される（ステップS6）。再び投光器P1
及び受光器R1がオンとなったとき、投光光線が物体によ
って遮断されていると（全く物体が移動しなかった場合
も、移動して再び戻った場合も含む。）再びタイマ24が
セットされ、リレー26もオンを継続し、接点28も閉成さ
れたままとなる。For example, when only the light projecting light projectors P 1 is blocked by an object in the detection area 10, the light receiver R 1 does not reach the light projecting light, the light receiving signal amplifying circuit 22, the light receiving signal is supplied First, the light receiving signal amplifying circuit 22 sets the timer 24, the timer 24 turns on the relay 26, and closes the contact 28 (steps S34 and S36). In this case, the emitter and receiver that is operating, since only projector P 1 and the light receiver R 1, projecting light rays from the other projector P 2 to P 4 by mistake is received by the photodetector R 1 There is no erroneous detection. The time limit of timer 24 is
Time required until the projector P 1 to P 4 and the light receiver R 1 to R 4 is turned on again after being turned on, respectively, i.e., it is set to a time required for one revolution A loop. Therefore, until the projector P 1 and the light receiver R 1 is turned on again, the object is projector P 1
And exits between the receivers R 1 and enters again between them,
The relay 26 remains on without being turned off. Further, when the projector P 1 and the light receiver R 1 is turned on again, the object is not blocking the light projecting light projectors P 1, i.e. out objects from between the projector P 1 and the light receiver R 1 If it has, the timer 24 turns off, the relay 26 turns off,
The contact 28 is opened (step S6). Floodlight P 1 again
And when the light receiver R 1 is turned on, (even if totally object did not move, includes a case where back again moved.) A light projecting light is blocked by the object again timer 24 is set As a result, the relay 26 also continues to be turned on, and the contact 28 remains closed.
他の投光器P2〜P4の投光光線が単独で遮断された場合
にも上記と同様に動作する（ステップS38、40;S42、44;
S46、48）。Also it operates in the same manner as described above when the projection rays of the other projector P 2 to P 4 is blocked by itself (step S38,40; S42,44;
S46, 48).
また、複数の投光光線が同一の物体によって遮断され
た場合、例えば投光器P1、P2の投光光線が同一の物体に
よって遮断された場合、投光器P1及び受光器R1がオンに
なったとき、タイマ24がセットされ、リレー26がオン
し、さらに投光器P2及び受光器R2がオンになったとき、
再びタイマ24がセットされる。従って、再び投光器P1及
び受光器R1がオンされたとき、既に投光器P1の投光光線
が物体によって遮断されてなくても、タイマ24はオフに
ならず、接点28は閉じたままである。そして、投光器P2
がオンになったときに、その投光光線が物体によって遮
断されていないとタイマ24がオフとなり、リレー26がオ
フとなり、その接点28が開放される。即ち、タイマ24は
最終的にセットされた時点からＡループ１周分の時間が
経過したときに、再セットされていないとオフとなり、
リレー26をオフとなり、接点28が開放される。When a plurality of light beams are blocked by the same object, for example, when the light beams of the light emitters P 1 and P 2 are interrupted by the same object, the light emitter P 1 and the light receiver R 1 are turned on. When the timer 24 is set, the relay 26 is turned on, and the transmitter P 2 and the receiver R 2 are turned on,
The timer 24 is set again. Therefore, when the light emitter P 1 and the light receiver R 1 are turned on again, the timer 24 does not turn off and the contact 28 remains closed even if the light beam emitted from the light emitter P 1 is not already blocked by the object. . Then, the projector P 2
Is turned on, the timer 24 is turned off, the relay 26 is turned off, and the contact 28 is opened if the light beam is not blocked by the object. That is, the timer 24 is turned off if the timer 24 has not been reset when a time corresponding to one round of the A loop has elapsed since the time of the final setting.
The relay 26 is turned off, and the contact 28 is opened.
上記の実施例は、ディジタルICを用いて構成したが、
例えばマイクロコンピュータを用い、第２図に示したよ
うな動作フローに従ってマイクロコンピュータを動作さ
せてもよい。Although the above embodiment is configured using a digital IC,
For example, the microcomputer may be operated according to the operation flow shown in FIG. 2 using the microcomputer.
＜効果＞ 以上のように、この発明によれば、複数の投光器と受
光器とを一定の周期で切り換えて、投光器の投光光線を
受光器に対して投光させ、投光器からの投光光線が遮断
されて発生した検知信号に応じて、再び投光器からの投
光光線が受光器に対して投光されるまでのループ１周分
の時間、タイマ手段が動作するので、この動作期間中に
物体がこの投光器と受光器との間からでて、再び入って
も、タイマ手段が動作しており、タイマ手段が停止する
までの間、物体の検知状態を維持できる。また、或る投
光器と受光器との間に物体が入ってから、これらの投光
器と受光器との間から出て、別の投光器と受光器との間
に、その物体が入る場合にも、その物体が別の投光器と
受光器との間に入ってから、ループ１周分の期間はタイ
マ手段が動作するので、同様に物体の検知状態を維持で
きる。従って、例えば、検知信号の非発生を条件として
作動させる装置に、本発明の検知スイッチを適用した場
合、物体が複数の投光器と受光器との間から出てタイマ
手段が停止して始めて、物体の非検知状態となるので、
確実に安全な状態で装置を作動させることができる。<Effects> As described above, according to the present invention, a plurality of light emitters and light receivers are switched at a fixed cycle, and the light emitted from the light emitter is emitted to the light receiver, and the light emitted from the light emitter is emitted. In response to the detection signal generated when the light is cut off, the timer means operates for a time corresponding to one loop of the loop until the light beam emitted from the light emitter is again emitted to the light receiver. Even if the object exits between the light emitter and the light receiver and enters again, the timer means is operating, and the detection state of the object can be maintained until the timer means stops. Also, when an object enters between a certain projector and a receiver, and then exits from between these projectors and the receiver, and enters between another projector and the receiver, the object also enters. Since the timer means operates for one round of the loop after the object enters between another light emitter and the light receiver, the detection state of the object can be similarly maintained. Therefore, for example, when the detection switch of the present invention is applied to a device that operates under the condition that the detection signal is not generated, the object comes out from between the plurality of light emitters and the light receivers, and the timer means is stopped and the object is started. Is not detected,
The device can be reliably operated in a safe state.
【図面の簡単な説明】 第１図はこの発明による多光線式面検知スイッチの１実
施例のブロック図、第２図は同実施例の動作フロー、第
３図は同実施例の各投光器と各受光器の動作状態を示す
図、第４図は従来の多光線式面検知スイッチの概略構成
図である。 P1〜P4……投光器、R1〜R4……受光器、10……検知エリ
ア、12……投光用発振周波数回路、14……投光器切換ス
イッチ、20……受光器切換スイッチ、22……受光信号増
幅回路、24……タイマ、26……リレー、28……接点、30
……切換信号発生回路。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of an embodiment of a multi-beam type surface detecting switch according to the present invention, FIG. 2 is an operation flow of the embodiment, and FIG. FIG. 4 is a diagram showing an operation state of each light receiver, and FIG. 4 is a schematic configuration diagram of a conventional multi-beam type surface detection switch. P 1 to P 4 ...... projector, R 1 to R 4 ...... photoreceiver, 10 ...... detection area, 12 ...... light projecting oscillation frequency circuit, 14 ...... projector changeover switch, 20 ...... optical receiver selector, 22 photoreceiver signal amplifier circuit, 24 timer, 26 relay, 28 contacts, 30
... Switching signal generation circuit.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭61−241607（ＪＰ，Ａ) 特開 昭62−105003（ＪＰ，Ａ) 特開 昭57−10481（ＪＰ，Ａ) 実開 昭58−150194（ＪＰ，Ｕ) ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-241607 (JP, A) JP-A-62-105003 (JP, A) JP-A-57-10481 (JP, A) 150194 (JP, U)
Claims (1)
状態において上記検知エリアに投光する複数の投光器
と、 これら投光器にそれぞれ対応して上記検知エリアの他側
に配置され、作動状態において対応する上記投光器から
の投光光線が遮断されたとき、検知信号を生成する複数
の受光器と、 上記各投光器及び上記各受光器のうち対応するものを、
順に上記作動状態に切り換えることを繰り返す切換手段
と、 上記各受光器のうちいずれかが上記検知信号を出力した
のに応動して、動作を開始し、その動作している状態
を、上記検知信号を出力した上記受光器及びこれに対応
する上記投光器が再び上記作動状態になるまでのループ
１周分の期間にわたって継続し、上記ループ１周分の期
間中に検知信号が供給されると、その供給時点から上記
ループ１周分の期間にわたる上記動作を再開始するタイ
マ手段とを、具備する多光線式面検知スイッチ。1. A plurality of light emitters arranged in a row on one side of a detection area and projecting light to the detection area in an operating state, and arranged on the other side of the detection area corresponding to the light emitters, respectively. In the state, when the light beam from the corresponding light projector is cut off, a plurality of light receivers that generate a detection signal, and a corresponding one of the light projectors and the light receivers,
Switching means for repeating switching to the operation state in order; and in response to one of the light receivers outputting the detection signal, starting the operation and changing the operating state to the detection signal. When the detection signal is supplied during the one round of the loop until the light receiver and the corresponding light emitter that output the signal again return to the operating state, and the detection signal is supplied during the one round of the loop, A timer means for restarting the above operation over a period corresponding to one round of the loop from a supply point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62291191A JP2627514B2 (en) | 1987-11-18 | 1987-11-18 | Multi-beam type surface detection switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62291191A JP2627514B2 (en) | 1987-11-18 | 1987-11-18 | Multi-beam type surface detection switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01132986A JPH01132986A (en) | 1989-05-25 |
| JP2627514B2 true JP2627514B2 (en) | 1997-07-09 |
Family
ID=17765635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62291191A Expired - Lifetime JP2627514B2 (en) | 1987-11-18 | 1987-11-18 | Multi-beam type surface detection switch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2627514B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04156717A (en) * | 1990-10-19 | 1992-05-29 | Nec Yamagata Ltd | Mutual interference preventing device for photosensor |
| JP2583712B2 (en) * | 1992-02-05 | 1997-02-19 | サンクス株式会社 | Through-beam sensors and area sensors |
| EP3610900A1 (en) * | 2018-08-16 | 2020-02-19 | Medela Holding AG | Baby bottle with bottle attachment |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58150194U (en) * | 1982-03-31 | 1983-10-07 | 株式会社日立製作所 | Sensor information reading circuit |
| JPS61241607A (en) * | 1985-04-19 | 1986-10-27 | Nec Corp | High speed optical position detecting device |
| JPS62105003A (en) * | 1985-10-31 | 1987-05-15 | Sharp Corp | Photoelectric body detecting device |
-
1987
- 1987-11-18 JP JP62291191A patent/JP2627514B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01132986A (en) | 1989-05-25 |
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