JPH036063A - Photointerrupter - Google Patents
PhotointerrupterInfo
- Publication number
- JPH036063A JPH036063A JP1140595A JP14059589A JPH036063A JP H036063 A JPH036063 A JP H036063A JP 1140595 A JP1140595 A JP 1140595A JP 14059589 A JP14059589 A JP 14059589A JP H036063 A JPH036063 A JP H036063A
- Authority
- JP
- Japan
- Prior art keywords
- light
- photointerrupter
- photodetectors
- output
- light emitting
- 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
- 238000001514 detection method Methods 0.000 abstract description 9
- 230000007257 malfunction Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Landscapes
- Photo Coupler, Interrupter, Optical-To-Optical Conversion Devices (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はフォトインタラプタに関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a photointerrupter.
従来のフォトインタラプタは、第４図に示すように、一
対の発光素子２及び受光素子３で構成されており、出力
は一個の受光素子の動作に依存していた。As shown in FIG. 4, a conventional photointerrupter is composed of a pair of light emitting element 2 and light receiving element 3, and the output depends on the operation of one light receiving element.
上述した従来のフォトインタラプタは、一対の発光素子
及び受光素子で構成されているので、発光素子あるいは
受光素子のどちらか一方でもドリフトを起したり、ノイ
ズ等で誤動作した場合にはフォトインタラプタの出力が
変化してしまい不安定であるという欠点がある。The conventional photo-interrupter described above is composed of a pair of light-emitting element and light-receiving element, so if either the light-emitting element or the light-receiving element drifts or malfunctions due to noise etc., the output of the photointerrupter will change. The disadvantage is that it is unstable due to changes in
本発明のフォトインタラプタは、発光用電源リードに並
列に接続された複数の発光素子と、前記発光素子のそれ
ぞれと対応する受光素子と、前記受光素子のそれぞれの
出力信号を受ける多数決回路及び一致回路を含む判定回
路とを有するというものである。The photointerrupter of the present invention includes a plurality of light emitting elements connected in parallel to a power supply lead for light emission, a light receiving element corresponding to each of the light emitting elements, and a majority circuit and a matching circuit that receive output signals from each of the light receiving elements. It has a determination circuit including:
第１図は本発明の一実施例の断面図を示す。 FIG. 1 shows a cross-sectional view of one embodiment of the invention.
透過型フォトインタラプタ内の部品はケース１の中に封
入されている。物体を検出するエリアでは発光素子２−
１〜２−３と受光素子３−１〜３−３がそれぞれ３個ず
つ対を成して取付けられている。尚、本例では検出素子
は３対であるが複数であれば良い。また、内部には判定
回路４があり外部へ電源リード５センス出カリ−ドロ、
不安電動作出カリ−ドアが出ている。発光素子は発光用
電源リード８に接続されている。The components inside the transmission type photointerrupter are enclosed in a case 1. In the area where objects are detected, the light emitting element 2-
Three light receiving elements 1 to 2-3 and three light receiving elements 3-1 to 3-3 are each attached in pairs. In this example, there are three pairs of detection elements, but a plurality of pairs may be used. In addition, there is a judgment circuit 4 inside, and a power lead 5 sense output to the outside.
Anxiety electric shock is coming out. The light emitting element is connected to a light emitting power supply lead 8.
第２図は一実施例を示す回路図である。発光素子２−１
〜２−３は並列接続されて発光用電源リードに接続され
、発光素子は発光した状態になっているものとする。今
、物体が発光素子と受光素子の間の光をさえぎると判定
回路４には、検出出力が入力される。FIG. 2 is a circuit diagram showing one embodiment. Light emitting element 2-1
2-3 are connected in parallel to the light emitting power supply lead, and the light emitting elements are in a state of emitting light. Now, when an object blocks the light between the light emitting element and the light receiving element, a detection output is input to the determination circuit 4.
判定回路４はインバータＩｌ、Ｉ２、アンドゲートＡＮ
１〜ＡＮ３、オアゲート０１から構成される多数決回路
と、インバータ１１〜Ｉ３、オアゲート０２，０３、ア
ンドゲートＡＮ４から構成される一致回路を含み、受光
素子の過半数が検出出力（”１”）を出していればセン
ス出カリードロが°“１“となる。The judgment circuit 4 includes inverters Il, I2, and an AND gate AN.
1 to AN3, a majority circuit consisting of OR gate 01, and a coincidence circuit consisting of inverters 11 to I3, OR gates 02 and 03, and AND gate AN4, and a majority of the light receiving elements output a detection output ("1"). If it is, the sense output Calidoro will be °“1”.
また、受光素子の全ての検出出力が一致しない場合は不
安走出カリ−ドアが“′１°°になる。Further, when all the detection outputs of the light receiving elements do not match, the unstable running car door becomes "'1°".
以上の動作をまとめると次表の真理値表が得られる。Summarizing the above operations, we obtain the truth table shown below.
表
従って、発光素子や発光素子の何個かが、故障あるいは
誤動作してもその個数が過半数に満たない場合はフォト
インタラプタとしての動作は保障される。不安定出力を
モニタすれば発光素子や受光素子の故障や誤動作を発見
することもてきる。Therefore, even if some of the light emitting elements or light emitting elements fail or malfunction, the operation as a photointerrupter is guaranteed as long as the number is less than the majority. By monitoring unstable output, it is also possible to discover failures or malfunctions in the light-emitting element or light-receiving element.
第３図は一実施例の変形の斜視図であり、反射型インタ
ラプタを示す国であり、動作は上述したものと全く同じ
である。FIG. 3 is a perspective view of a variation of one embodiment, showing a reflective interrupter, the operation of which is exactly the same as described above.
以上説明したように本発明は、複数の発光素子−受光素
子対及び検出出力を判定し外部へ出力するための判定回
路を有しているので、フォトインタラプタの動作の安定
性及び信頼性が改善される効果がある。As explained above, since the present invention includes a plurality of light emitting element-light receiving element pairs and a determination circuit for determining detection outputs and outputting them to the outside, the stability and reliability of the operation of the photointerrupter are improved. It has the effect of being
第１図は本発明の一実施例の断面図、第２図は一実施例
を示す回路図、第３図は一実施例の変形を示す斜視図、
第４図は従来のフォトインタラプタの断面図である。
１・・・ケース、２−１．２−２．２−３・・・発光素
子、３−１．３−２．３−３・・・受光素子、４・・・
判定回路、５・・・電源リード、６・・・センス出力リ
ード、７・・・不安定出力リード、８・・・発光用電源
リード、ＡＮＩ〜ＡＮ４・・・アンドゲート、■１〜Ｉ
３・・・インバータ、０１〜０３・・・オアゲート、Ｒ
１−Ｒ３・・・プルアップ抵抗。
肩 １ 図FIG. 1 is a sectional view of one embodiment of the present invention, FIG. 2 is a circuit diagram showing one embodiment, and FIG. 3 is a perspective view showing a modification of one embodiment.
FIG. 4 is a sectional view of a conventional photointerrupter. DESCRIPTION OF SYMBOLS 1... Case, 2-1.2-2.2-3... Light emitting element, 3-1.3-2.3-3... Light receiving element, 4...
Judgment circuit, 5...Power supply lead, 6...Sense output lead, 7...Unstable output lead, 8...Power supply lead for light emission, ANI to AN4...And gate, ■1 to I
3...Inverter, 01-03...OR gate, R
1-R3...Pull-up resistor. Shoulder 1 figure
Claims (1)
、前記発光素子のそれぞれと対応する受光素子と、前記
受光素子のそれぞれの出力信号を受ける多数決回路及び
一致回路を含む判定回路とを有することを特徴とするフ
ォトインタラプタ。It has a plurality of light emitting elements connected in parallel to a light emitting power supply lead, a light receiving element corresponding to each of the light emitting elements, and a determination circuit including a majority circuit and a coincidence circuit that receives output signals of each of the light receiving elements. A photo interrupter characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14059589A JP2806557B2 (en) | 1989-06-02 | 1989-06-02 | Photo-interrupter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14059589A JP2806557B2 (en) | 1989-06-02 | 1989-06-02 | Photo-interrupter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH036063A true JPH036063A (en) | 1991-01-11 |
| JP2806557B2 JP2806557B2 (en) | 1998-09-30 |
Family
ID=15272352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14059589A Expired - Fee Related JP2806557B2 (en) | 1989-06-02 | 1989-06-02 | Photo-interrupter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2806557B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0786633A (en) * | 1993-09-16 | 1995-03-31 | Nec Corp | Composite photocoupler |
| US6257312B1 (en) | 1998-08-07 | 2001-07-10 | Alcan International Limited | Preparation of metal-matrix composite materials with high particulate loadings by concentration |
| JP2011199201A (en) * | 2010-03-23 | 2011-10-06 | Yamato Scale Co Ltd | Photocoupler device |
-
1989
- 1989-06-02 JP JP14059589A patent/JP2806557B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0786633A (en) * | 1993-09-16 | 1995-03-31 | Nec Corp | Composite photocoupler |
| US6257312B1 (en) | 1998-08-07 | 2001-07-10 | Alcan International Limited | Preparation of metal-matrix composite materials with high particulate loadings by concentration |
| JP2011199201A (en) * | 2010-03-23 | 2011-10-06 | Yamato Scale Co Ltd | Photocoupler device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2806557B2 (en) | 1998-09-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |