JP2806557B2 - Photo-interrupter - Google Patents
Photo-interrupterInfo
- Publication number
- JP2806557B2 JP2806557B2 JP14059589A JP14059589A JP2806557B2 JP 2806557 B2 JP2806557 B2 JP 2806557B2 JP 14059589 A JP14059589 A JP 14059589A JP 14059589 A JP14059589 A JP 14059589A JP 2806557 B2 JP2806557 B2 JP 2806557B2
- Authority
- JP
- Japan
- Prior art keywords
- light emitting
- light
- light receiving
- circuit
- emitting element
- 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 - Fee Related
Links
Landscapes
- Photo Coupler, Interrupter, Optical-To-Optical Conversion Devices (AREA)
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。Description: TECHNICAL FIELD The present invention relates to a photo interrupter.
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。A conventional photo interrupter, as shown in FIG.
It 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。Since the above-described conventional photointerrupter is constituted by a pair of light emitting element and light receiving element, if either the light emitting element or the light receiving element drifts or malfunctions due to noise or the like, the output of the photo interrupter is output. However, there is a drawback that it is unstable because it changes.
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。A photointerrupter according to the present invention includes a plurality of light emitting elements connected in parallel to a light emitting power lead, a light receiving element corresponding to each of the light emitting elements, a majority circuit and a coincidence circuit for receiving an output signal of each of the light receiving elements. And a judgment 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 sectional view of one embodiment of the present 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センス出力リード６、
不安定動作出力リード７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 in the transmission type photointerrupter are enclosed in a case 1. In the area for detecting an object, the light emitting element 2
-1 to 2-3 and light receiving elements 3-1 to 3-3 are mounted in pairs of three each. In this example, three pairs of detection elements are used, but a plurality of pairs may be used. A decision circuit 4 is provided inside, and a power supply lead 5 and a sense output lead 6 are provided to the outside.
The unstable operation output lead 7 is out. The light emitting element is connected to a power supply lead 8 for light emission.
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 to 2-3 are connected in parallel and connected to a power supply lead for light emission, and the light emitting element is in a light emitting state.
Now, when an object blocks 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I1,I2、アンドゲートAN1〜AN
3、オアゲートO1から構成される多数決回路と、インバ
ータI1〜I3、オアゲートO2,O3、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力リード６が“1"とな
る。The determination circuit 4 includes inverters I1 and I2 and AND gates AN1 to AN
3. Includes a majority circuit composed of an OR gate O1 and a matching circuit composed of inverters I1 to I3, OR gates O2, O3, and AND gate AN4. For example, the sense output lead 6 becomes "1".
また、受光素子の全ての検出出力が一致しない場合は
不安定出力リード７が“1"になる。When all the detection outputs of the light receiving elements do not match, the unstable output lead 7 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。 When the above operations are summarized, the following truth table is obtained.
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
見することもできる。 Therefore, when the number of the light emitting elements or some of the light emitting elements is less than a majority even if the light emitting elements are broken or malfunction, the operation as the photo interrupter is guaranteed. By monitoring the unstable output, a failure or malfunction of the light emitting element or the light receiving element can be found.
第３図は一実施例の変形の斜視図であり、反射型イン
タラプタを示す図であり、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 modification of the embodiment, showing a reflection type interrupter, and the operation is exactly the same as that 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 described above, the present invention has a plurality of light emitting element-light receiving element pairs and a determination circuit for determining and outputting the detection output to the outside, so that the stability and reliability of the operation of the photo interrupter are improved. Has the effect of being done.
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、AN1〜AN4……アンドゲ
ート、I1〜I3……インバータ、O1〜O3……オアゲート、
R1〜R3……プルアップ抵抗。1 is a sectional view of one embodiment of the present invention, FIG. 2 is a circuit diagram showing one embodiment, FIG. 3 is a perspective view showing a modification of one embodiment,
FIG. 4 is a sectional view of a conventional photointerrupter. 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, AN1 to AN4 …… and gate, I1-I3 …… inverter, O1-O3 …… OR gate,
R1 to R3: Pull-up resistors.
Claims (1)
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ことを
特徴とするフォトインタラプタ。1. A light emitting device comprising: 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; a majority circuit and a coincidence circuit for receiving an output signal of each of the light receiving elements; A photo interrupter comprising: a determination circuit;
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 JPH036063A (en) | 1991-01-11 |
| JP2806557B2 true 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) |
Families Citing this family (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 |
| JP5545636B2 (en) * | 2010-03-23 | 2014-07-09 | 大和製衡株式会社 | Photocoupler device |
-
1989
- 1989-06-02 JP JP14059589A patent/JP2806557B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH036063A (en) | 1991-01-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |