JPS59108978A - Passing object detector - Google Patents
Passing object detectorInfo
- Publication number
- JPS59108978A JPS59108978A JP57219815A JP21981582A JPS59108978A JP S59108978 A JPS59108978 A JP S59108978A JP 57219815 A JP57219815 A JP 57219815A JP 21981582 A JP21981582 A JP 21981582A JP S59108978 A JPS59108978 A JP S59108978A
- Authority
- JP
- Japan
- Prior art keywords
- light
- light emitting
- emitting element
- receiving element
- light receiving
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
- G01V8/12—Detecting, e.g. by using light barriers using one transmitter and one receiver
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
Description
【発明の詳細な説明】
座業上の利用分野
本発明は発光素子と受光素子との間に物体が入る事によ
って受光素子に入射する光量が変化することを利用し、
た通過物体検出装置に関する。[Detailed Description of the Invention] Field of Use for Sedentary Work The present invention utilizes the fact that the amount of light incident on the light receiving element changes when an object enters between the light emitting element and the light receiving element.
The present invention relates to a passing object detection device.
従来例の構成とその問題点
従来、この種の通過物体検出装置は第１図のように構成
されている。（１）は発光素子、（２）は被検出通過物
体、（３）は発光素子（１）からの光を検出してこれを
電気・１ｇ号Ｖこ変換する受光素子、（４）は受光素子
＜、３）の出力１ぎ号を増幅する増−器である。この従
来の通過物体検出装置は発光素子（１）と受光素子（３
）との光路内を物体が通過することによる受光素子にあ
たる光量の変化を電気１ａ号に変換し、増幅の後、出力
するものである。しかし、これは発光素子（１）に板検
出物体の有無にかかわらず一定の電流を流しているだけ
であり、温度質化や雑音に対して十分な余裕をもたせる
ためには発光素子（１）の発光光量を十分強くする必要
があった。このため、十分な雑音余裕をもたせるために
は発光素子（１）の消費電力を大きくする心安があり、
発光素子（１）の劣化も早いという欠点がある。Conventional structure and problems thereof Conventionally, this type of passing object detection device has been structured as shown in FIG. (1) is a light emitting element, (2) is a passing object to be detected, (3) is a light receiving element that detects the light from the light emitting element (1) and converts it into electricity, and (4) is a light receiving element. This is an amplifier that amplifies the output signal of element <, 3). This conventional passing object detection device has a light emitting element (1) and a light receiving element (3).
) The change in the amount of light hitting the light-receiving element caused by an object passing through the optical path is converted into electrical No. 1a, which is amplified and then output. However, this only causes a constant current to flow through the light emitting element (1) regardless of the presence or absence of the plate detection object, and in order to have sufficient margin against temperature changes and noise, the light emitting element (1) It was necessary to make the amount of light emitted sufficiently strong. Therefore, in order to have sufficient noise margin, it is safe to increase the power consumption of the light emitting element (1).
There is a drawback that the light emitting element (1) deteriorates quickly.
発明の目的
本発明ｅユ少ない平均光電でも大きな雑材余裕が得られ
るようにして低消費′屯力化ならびに発光素子の劣化を
防止することができる通過物体検出装置を提供すること
金目的とする。OBJECTS OF THE INVENTION It is an object of the present invention to provide a passing object detection device that can reduce power consumption and prevent deterioration of light emitting elements by obtaining a large margin for miscellaneous materials even with a small amount of average photoelectric power. .
発明の構成
不発明の通過物体検出装置は、光束を放射Ｊる発光手段
と、上ｉ己光束全受光して電気１５号に変換する受光手
段と、上記受光手段が上記光束を検出したとき上ｄピ光
束の光重を増加するように上記発光手段を制御する正帰
還回路とを設け、上記元来の光路内を通過したことを
上Ｈ上受光手段出力から得ることを特徴とする。Structure of the Invention An uninvented passing object detection device includes a light emitting means for emitting a luminous flux, a light receiving means for receiving all of the luminous flux and converting it into electricity, and a light receiving means for receiving the entire luminous flux and converting it into electricity, and when the light receiving means detects the luminous flux, A positive feedback circuit is provided to control the light emitting means so as to increase the light weight of the d-pi light flux, and the positive feedback circuit is provided to control the light emitting means so as to increase the light weight of the d-pi light flux, and to detect that it has passed through the original optical path.
It is characterized in that it is obtained from the output of the upper H upper light receiving means.
実施例の説明
以下、本発明の実施例を第２図〜第４図に基づいて説明
する。DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on FIGS. 2 to 4.
給２図は本発明による通過物体検出装置の一実施例を示
す。発光素子（１）より出た光Ｐｈは検出される被検出
物体としての、例えばスリット板（２）で光重の変化ケ
受けて受光素子（３）に刺通して電気１ｄ号変化に変換
され増幅６（４）に入力きれる。（５）は発光素子（１
）に微弱な電流金泥す抵抗、（６）は発光素子（１）へ
の供給電流を制・御する正帰還回路で、受光素子（３）
の出力で導通が制御されるトランジスタ（７）とこれに
直列接続された抵抗（８）とから成り、スリット板（２
γによって受光素子（３）に入射する光束が遮ぎられて
いるときには発光素子（１）に流れる電流を小さくする
ように、そしてスリット板（２７が移動して受光素子（
３） Ｋ入射する元来が増したときには発光素子（ｉ）
ＶＣ流ＩＬる電流ケ大きくするように構成されている。Figure 2 shows an embodiment of a passing object detection device according to the present invention. The light Ph emitted from the light emitting element (1) is detected as an object to be detected, such as a slit plate (2), where it receives changes in light weight and passes through the light receiving element (3), where it is converted into an electrical 1d change and amplified. 6(4) can be entered. (5) is a light emitting element (1
) is a resistor that carries a weak current, and (6) is a positive feedback circuit that controls the current supplied to the light-emitting element (1), and the light-receiving element (3).
It consists of a transistor (7) whose conduction is controlled by the output of the transistor (7) and a resistor (8) connected in series with the transistor (7).
When the light beam incident on the light receiving element (3) is blocked by γ, the slit plate (27) is moved to reduce the current flowing to the light emitting element (1) and the light receiving element (3) is blocked by γ.
3) When the number of K incident sources increases, the light emitting element (i)
It is configured to increase the current flowing through the VC current IL.
第３図（ａ） （ｂ）はそれぞれ正帰還回路（６）がな
い通過物体検出装置と正帰還回路（６）をつけた８ｇ２
図の通過物体検出装置の雑音制御の効果を示す動作図で
ある。期間りが共に遮蔽時で、この２つを比べることＶ
Ｃよって、正帰遠回＊ （６）の動きで発光光量を最適
に制御し得るので雑音に強いものとなっていることがわ
かる。Figures 3(a) and 3(b) show a passing object detection device without a positive feedback circuit (6) and an 8g2 with a positive feedback circuit (6), respectively.
FIG. 3 is an operation diagram showing the effect of noise control of the passing object detection device shown in the figure. Comparing these two when both periods are occluded is V.
Therefore, it can be seen that the amount of emitted light can be optimally controlled by the movement of positive recursion* (6), making it resistant to noise.
第４図は本発明の他の実施・レリを示す。これは、増幅
器（４）の出力から発光素子（１ンへ正帰還回路（６）
がつながれているもので、受光素子（３）の暗電流で正
帰還回路（６）が製作しないように、増幅器（４）を構
成する演算増幅器（ｏｐ）の−万の人力ｖｃ嵐圧Ｅを印
加してヒステリシスが設けられている他は第２図と動作
は同じである。FIG. 4 shows another implementation of the invention. This is a positive feedback circuit (6) from the output of the amplifier (4) to the light emitting element (1).
is connected to the operational amplifier (OP) which makes up the amplifier (4) to prevent the dark current of the light receiving element (3) from creating a positive feedback circuit (6). The operation is the same as in FIG. 2 except that hysteresis is applied.
なお、上記実施例では透Ａ型の場合を例に挙げて説明し
たが、これは反射型の場合でも同様に実施β工「目であ
る。In the above embodiments, the case of transparent type A was explained as an example, but this also applies to the case of reflective type.
発明の詳細
な説明のようＶこ本発明の通過物体検出装置によると、
受光素子側から発光素子側１ｃｉｉ号を戻す正帰還回路
を設けて発光素子への供給電流を制限したため、発光素
子に流れる電流は、受光素子へ入射する光束が遮断され
ている時は低減されて平均消費電力を低くおさえること
ができる。きらに光束を検出したときは発光素子に強い
電流を流すように作用するため、大きな出力を得やすい
。そのため、従来の装置より容易に増幅器を飽昶させる
ことができるので、発光素子、受光素子等の構成部品の
ばらつき、劣化温度変化に対しても強くスルことかでさ
、装置の信頼性全向上させることができるものである。According to the detailed description of the invention, the passing object detection device of the present invention has the following features:
Since a positive feedback circuit is provided to return No. 1cii from the light-receiving element side to the light-emitting element side to limit the current supplied to the light-emitting element, the current flowing to the light-emitting element is reduced when the luminous flux incident on the light-receiving element is blocked. Average power consumption can be kept low. When a luminous flux is detected, a strong current flows through the light emitting element, making it easy to obtain a large output. As a result, it is possible to saturate the amplifier more easily than with conventional devices, making it more resistant to variations in component parts such as light emitting elements and light receiving elements, deterioration and temperature changes, and improving the reliability of the device. It is something that can be done.
第１図は従来の通４物体検出装置の構成図、第２図は本
発明の通過物体検出装置の一実施しリの構成図、第３図
は第２図の雑音抑制の効果説明図、第４図は他の実施例
の構成図である。
（１）・・・発光素子〔発光手段〕、（２）・・・スリ
ット板〔被検出切体〕、（３）・・−受光素子〔受光手
段〕、（４）・・・増幅器、（６）・・・正帰還回路、
ｐｈ・・・光束代理人 森 本 義 弘
第１図
第３図
ｄλ
（１７）FIG. 1 is a block diagram of a conventional passing object detection device, FIG. 2 is a block diagram of an implementation of the passing object detection device of the present invention, and FIG. 3 is a diagram explaining the effect of noise suppression in FIG. FIG. 4 is a block diagram of another embodiment. (1)...Light emitting element [light emitting means], (2)...Slit plate [detection object], (3)...-Light receiving element [light receiving means], (4)...Amplifier, ( 6)...Positive feedback circuit,
ph...Luminous flux agent Yoshihiro Morimoto Figure 1 Figure 3 dλ (17)
Claims (1)
気悟号に変換する受光手段と、上記受光手段が上記光束
を検出したとき上記光束の光量を増加するように上記発
光手段を制御する正帰還回路とを設け、上記光束の光路
内を被検出物体が通過したことを上記受光手段出力から
得る通過物体検出装置。1. A light-emitting means for emitting a luminous flux, a light-receiving means for receiving the luminous flux and converting it into an electric symbol, and controlling the light-emitting means so as to increase the amount of the luminous flux when the light-receiving means detects the luminous flux. a positive feedback circuit, and detects from the output of the light receiving means that the object to be detected has passed within the optical path of the light beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57219815A JPS59108978A (en) | 1982-12-14 | 1982-12-14 | Passing object detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57219815A JPS59108978A (en) | 1982-12-14 | 1982-12-14 | Passing object detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59108978A true JPS59108978A (en) | 1984-06-23 |
Family
ID=16741464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57219815A Pending JPS59108978A (en) | 1982-12-14 | 1982-12-14 | Passing object detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59108978A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63282684A (en) * | 1987-05-14 | 1988-11-18 | Daiichi Denki Sangyo Kk | Passing state detector |
| EP0484877A2 (en) * | 1990-11-05 | 1992-05-13 | Kabushiki Kaisha Toshiba | Photo-interrupter |
| EP1004901A2 (en) * | 1998-11-27 | 2000-05-31 | Akira Ishizuka | Dustproof mechanism for a detecting means |
| WO2021152885A1 (en) * | 2020-01-29 | 2021-08-05 | 北野 幹夫 | Sensor control circuit and device with built-in sensor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS496136U (en) * | 1972-04-18 | 1974-01-19 |
-
1982
- 1982-12-14 JP JP57219815A patent/JPS59108978A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS496136U (en) * | 1972-04-18 | 1974-01-19 |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63282684A (en) * | 1987-05-14 | 1988-11-18 | Daiichi Denki Sangyo Kk | Passing state detector |
| EP0484877A2 (en) * | 1990-11-05 | 1992-05-13 | Kabushiki Kaisha Toshiba | Photo-interrupter |
| EP1004901A2 (en) * | 1998-11-27 | 2000-05-31 | Akira Ishizuka | Dustproof mechanism for a detecting means |
| EP1004901A3 (en) * | 1998-11-27 | 2002-12-04 | Akira Ishizuka | Dustproof mechanism for a detecting means |
| WO2021152885A1 (en) * | 2020-01-29 | 2021-08-05 | 北野 幹夫 | Sensor control circuit and device with built-in sensor |
| JP2021117200A (en) * | 2020-01-29 | 2021-08-10 | 幹夫 北野 | Sensor control circuit and sensor built-in apparatus |
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