JPH0423335U - - Google Patents
Info
- Publication number
- JPH0423335U JPH0423335U JP6382890U JP6382890U JPH0423335U JP H0423335 U JPH0423335 U JP H0423335U JP 6382890 U JP6382890 U JP 6382890U JP 6382890 U JP6382890 U JP 6382890U JP H0423335 U JPH0423335 U JP H0423335U
- Authority
- JP
- Japan
- Prior art keywords
- light
- light receiving
- receiving circuit
- receiving
- forced
- 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 claims description 7
- 230000005856 abnormality Effects 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 claims description 3
- 230000003321 amplification Effects 0.000 claims 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims 2
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
Landscapes
- Electronic Switches (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Description
第１図ないし第５図は本考案の第１実施例を示
し、第１図はブロツク図、第２図は全体のフロー
チヤート、第３図はチエツクルーチンのフローチ
ヤート、第４図は要部の電圧波形図、第５図は判
定手段のヒステリシス特性を示す特性図である。
第６図は本考案の第２実施例を示す第４図相当図
、第７図は同第３実施例を示す要部のブロツク図
、第８図は同第４実施例を示す要部のブロツク図
である。
図面中、２，４３は可変抵抗器（検出感度調節
手段）、４は検出用の投光素子、５はチエツク用
の投光素子、７，４４はアナログスイツチ（バイ
パス手段）、８は受光素子、９，４０は受光回路
、１２は判定手段、１３は制御回路（異常検出手
段）である。
1 to 5 show a first embodiment of the present invention, FIG. 1 is a block diagram, FIG. 2 is an overall flowchart, FIG. 3 is a flowchart of a check routine, and FIG. 4 is a main part. FIG. 5 is a characteristic diagram showing the hysteresis characteristic of the determination means.
Fig. 6 is a diagram corresponding to Fig. 4 showing the second embodiment of the present invention, Fig. 7 is a block diagram of the main part showing the third embodiment of the invention, and Fig. 8 is a diagram of the main part showing the fourth embodiment of the invention. It is a block diagram. In the drawing, 2 and 43 are variable resistors (detection sensitivity adjustment means), 4 is a light emitting element for detection, 5 is a light emitting element for checking, 7 and 44 are analog switches (bypass means), and 8 is a light receiving element. , 9 and 40 are light receiving circuits, 12 is a determination means, and 13 is a control circuit (abnormality detection means).
Claims (1)
された光を受けるように設けられる受光素子と、 この受光素子からの光電変換信号を増幅する受
光回路と、 前記受光回路からの受光信号に基づき前記受光
素子への入光状態にあるか非入光状態にあるかを
判断して被検出物体の検出動作をおこなう判定手
段と、 前記投光素子の発光強度又は前記受光回路にお
ける増幅率を調整する検出感度調節手段と、 点灯されることにより前記被検出物体の有無に
関わらず前記受光素子に光を入射させる強制入光
動作を行うチエツク用の投光素子と、 前記強制入光動作の実行時に前記検出感度調節
手段を無効化することにより前記チエツク用の投
光素子を大なる発光強度で点灯させ又は前記受光
回路を大なる増幅率に設定するバイパス手段と、 前記強制入光動作の実行により前記受光回路が
前記受光素子への入光状態になるか否かを判定し
て異常を検出する異常検出手段とを具備してなる
光電スイツチ。[Claims for Utility Model Registration] A light projecting element for detection, a light receiving element provided to receive light projected from the light projecting element, a light receiving circuit for amplifying a photoelectric conversion signal from the light receiving element, and the above. a determining means for detecting an object by determining whether the light-receiving element is in a light-entering state or not in a light-receiving state based on a light-receiving signal from a light-receiving circuit; a detection sensitivity adjustment means for adjusting an amplification factor in the light receiving circuit; and a check light projecting element that performs a forced light entry operation to cause light to enter the light receiving element regardless of the presence or absence of the detected object by being turned on. , bypass means for lighting the check light emitting element at a high light emission intensity or setting the light receiving circuit at a high amplification factor by disabling the detection sensitivity adjustment means when executing the forced light entry operation; . Abnormality detection means for detecting an abnormality by determining whether or not the light receiving circuit enters a state in which light enters the light receiving element by executing the forced light entry operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990063828U JPH0753311Y2 (en) | 1990-06-15 | 1990-06-15 | Photoelectric switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990063828U JPH0753311Y2 (en) | 1990-06-15 | 1990-06-15 | Photoelectric switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0423335U true JPH0423335U (en) | 1992-02-26 |
| JPH0753311Y2 JPH0753311Y2 (en) | 1995-12-06 |
Family
ID=31594223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990063828U Expired - Fee Related JPH0753311Y2 (en) | 1990-06-15 | 1990-06-15 | Photoelectric switch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0753311Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52122876A (en) * | 1976-04-09 | 1977-10-15 | Tokyo Shibaura Electric Co | Photoelectric relay with fault detection device |
-
1990
- 1990-06-15 JP JP1990063828U patent/JPH0753311Y2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52122876A (en) * | 1976-04-09 | 1977-10-15 | Tokyo Shibaura Electric Co | Photoelectric relay with fault detection device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0753311Y2 (en) | 1995-12-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |