JPH01168934U - - Google Patents
Info
- Publication number
- JPH01168934U JPH01168934U JP6644788U JP6644788U JPH01168934U JP H01168934 U JPH01168934 U JP H01168934U JP 6644788 U JP6644788 U JP 6644788U JP 6644788 U JP6644788 U JP 6644788U JP H01168934 U JPH01168934 U JP H01168934U
- Authority
- JP
- Japan
- Prior art keywords
- light
- retroreflector
- receiver
- comparator
- photoelectric switch
- 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
- 230000000903 blocking effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 1
Landscapes
- Switches Operated By Changes In Physical Conditions (AREA)
- Electronic Switches (AREA)
Description
第１図は本考案の一実施例による回帰反射型光
電スイツチの全体構成を示すブロツク図、第２図
は本実施例の近接スイツチの全体構成を示す図、
第３図は検出距離と受光出力の関係を示すグラフ
、第４図は従来の回帰反射型光電スイツチの構成
を示す図、第５図はその検出距離と受光出力の関
係を示すグラフである。
１０……光電スイツチ本体、１１……発振回路
、１４ａ……投光素子、１４……投光器、１５…
…受光器、１５ａ……受光素子、１７……比較器
、１７ａ，１７ｂ……コンパレータ、１９……Ｅ
ＯＲ回路、２１……シフトレジスタ、２３……ア
ンド回路、２４……遅延回路、２５……信号処理
手段、２６……出力回路。
FIG. 1 is a block diagram showing the overall configuration of a retroreflective photoelectric switch according to an embodiment of the present invention, and FIG. 2 is a diagram showing the overall configuration of a proximity switch according to the present embodiment.
FIG. 3 is a graph showing the relationship between detection distance and light reception output, FIG. 4 is a diagram showing the configuration of a conventional retroreflective photoelectric switch, and FIG. 5 is a graph showing the relationship between detection distance and light reception output. DESCRIPTION OF SYMBOLS 10... Photoelectric switch main body, 11... Oscillation circuit, 14a... Light emitter, 14... Light emitter, 15...
...Photoreceiver, 15a...Photodetector, 17...Comparator, 17a, 17b...Comparator, 19...E
OR circuit, 21...shift register, 23...AND circuit, 24...delay circuit, 25...signal processing means, 26...output circuit.
Claims (1)
と、 前記回帰反射板に向けて光を照射する投光器と
、 前記投光器から回帰反射板に照射された光の反
射光を受光する受光器と、を有し、受光レベルに
基づいて物体を検出する回帰反射型光電スイツチ
であつて、 遮光物体がないときに前記投光器からの光を反
射して得られる前記受光器の受光レベルの上下に
所定の閾値範囲を有する比較器と、 前記受光器の受光レベルが前記比較器の閾値の
範囲内にないときに物体を検出する信号処理手段
と、を有することを特徴とする回帰反射型光電ス
イツチ。[Claims for Utility Model Registration] A retroreflector that reflects irradiated light in that direction; a floodlight that irradiates light toward the retroreflector; and a reflection of the light irradiated from the floodlight to the retroreflector. A retroreflective photoelectric switch that detects an object based on the received light level, and has a light receiver that receives light, and the light receiver is obtained by reflecting the light from the light projector when there is no light blocking object. a comparator having a predetermined threshold range above and below a light reception level of the light receiver; and a signal processing means for detecting an object when the light reception level of the light receiver is not within the threshold range of the comparator. Retroreflective photoelectric switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6644788U JPH01168934U (en) | 1988-05-19 | 1988-05-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6644788U JPH01168934U (en) | 1988-05-19 | 1988-05-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01168934U true JPH01168934U (en) | 1989-11-29 |
Family
ID=31291853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6644788U Pending JPH01168934U (en) | 1988-05-19 | 1988-05-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01168934U (en) |
-
1988
- 1988-05-19 JP JP6644788U patent/JPH01168934U/ja active Pending
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