JPH01113792U - - Google Patents
Info
- Publication number
- JPH01113792U JPH01113792U JP850388U JP850388U JPH01113792U JP H01113792 U JPH01113792 U JP H01113792U JP 850388 U JP850388 U JP 850388U JP 850388 U JP850388 U JP 850388U JP H01113792 U JPH01113792 U JP H01113792U
- Authority
- JP
- Japan
- Prior art keywords
- light
- transistor
- detection
- charged
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims description 14
- 239000003990 capacitor Substances 0.000 claims description 7
- 230000010355 oscillation Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Fire-Detection Mechanisms (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Description
第１図は本考案の一実施例の回路図、第２図は
従来例の回路図、第３図は他の従来例の回路図で
ある。
１は発振回路、２は検知回路、３は信号処理回
路、Ｑ２はＰＵＴ、Ｑ３〜Ｑ５はトランジスタ、
Ｃ１，Ｃ２はコンデンサである。
FIG. 1 is a circuit diagram of one embodiment of the present invention, FIG. 2 is a circuit diagram of a conventional example, and FIG. 3 is a circuit diagram of another conventional example. 1 is an oscillation circuit, 2 is a detection circuit, 3 is a signal processing circuit, Q2 is a PUT, Q3 to Q5 are transistors,
C 1 and C 2 are capacitors.
補正 昭６３．４．１
実用新案登録請求の範囲を次のように補正する
。Amendment April 1, 1981 The scope of claims for utility model registration is amended as follows.
【実用新案登録請求の範囲】
発振回路出力にて間欠的に発光する発光素子と
、この発光素子の光を受光する受光素子と、この
受光素子の受光量の変化から検知物体の存在を検
知する検知回路と、検知回路出力に発光素子の発
光に応じて複数回連続して検知出力が生じたとき
に上記検知物体が存在すると判定する信号処理回
路とからなる光電式感知器において、上記検知回
路の検知出力が生じたときに導通するＮＰＮ形の
第１のトランジスタと、上記第１のトランジスタ
と電源に直列に接続され発光素子が発光している
ときに導通するＮＰＮ形の第２のトランジスタと
、上記両トランジスタが共に導通したときに導通
するＰＮＰ形の第３のトランジスタと、上記第１
及び第２のトランジスタが共に導通したときに充
電されその充電電荷で第３のトランジスタの導通
時間を引き延ばす第１のコンデンサと、上記第３
のトランジスタの導通により充電される第２のコ
ンデンサと、上記第１及び第２のトランジスタが
連続して複数回導通したときの第２のコンデンサ
の充電電荷によりオンして物体を検知したことを
示す判定信号を出力するＰＵＴとで上記信号処理
回路を構成して成ることを特徴とする光電式感知
器。[Claims for Utility Model Registration] A light-emitting element that emits light intermittently using the output of an oscillation circuit, a light-receiving element that receives light from the light-emitting element, and a detection object based on changes in the amount of light received by the light-receiving element. A photoelectric sensor consisting of a detection circuit that detects the presence of the object, and a signal processing circuit that determines that the detection object is present when the detection circuit output generates a detection output multiple times in succession in response to light emission from a light emitting element. a first NPN transistor that is conductive when the detection output of the detection circuit is generated; a second transistor, a PNP-type third transistor that conducts when both of the transistors conduct, and the first transistor;
and a first capacitor that is charged when both the second transistors conduct and extends the conduction time of the third transistor with the charged charge;
A second capacitor is charged by the conduction of the transistor, and when the first and second transistors are conductive several times in succession, the second capacitor is turned on by the charge charged, indicating that an object has been detected. A photoelectric sensor characterized in that the signal processing circuit is constituted by a PUT that outputs a determination signal.
Claims (1)
、この発光素子の光を受光する受光素子と、上記
発光素子の光が検知物体により遮断されたときの
受光素子の受光量の変化から検知物体の存在を検
知する検知回路と、検知回路出力に発光素子の発
光に応じて複数回連続して検知出力が生じたとき
に上記検知物体が存在すると判定する信号処理回
路とからなる光電式感知器において、上記検知回
路の検知出力が生じたときに導通するＮＰＮ形の
第１のトランジスタと、上記第１のトランジスタ
と電源に直列に接続され発光素子が発光している
ときに導通するＮＰＮ形の第２のトランジスタと
、上記両トランジスタが共に導通したときに導通
するＰＮＰ形の第３のトランジスタと、上記第１
及び第２のトランジスタが共に導通したときに充
電されその充電電荷で第３のトランジスタの導通
時間を引き延ばす第１のコンデンサと、上記第３
のトランジスタの導通により充電される第２のコ
ンデンサと、上記第１及び第２のトランジスタが
連続して複数回導通したときの第２のコンデンサ
の充電電荷によりオンして物体を検知したことを
示す判定信号を出力するＰＵＴとで上記信号処理
回路を構成して成ることを特徴とする光電式感知
器。 A light-emitting element that emits light intermittently with the output of an oscillation circuit, a light-receiving element that receives light from the light-emitting element, and a detected object based on changes in the amount of light received by the light-receiving element when the light from the light-emitting element is blocked by the sensing object. A photoelectric sensor consisting of a detection circuit that detects the presence of the object, and a signal processing circuit that determines that the detection object is present when the detection circuit output generates a detection output multiple times in succession in response to light emission from a light emitting element. a first NPN transistor that is conductive when the detection output of the detection circuit is generated; a second transistor, a PNP-type third transistor that conducts when both of the transistors conduct, and the first transistor;
and a first capacitor that is charged when both the second transistors conduct and extends the conduction time of the third transistor with the charged charge;
A second capacitor is charged by the conduction of the transistor, and when the first and second transistors are conductive several times in succession, the second capacitor is turned on by the charge charged, indicating that an object has been detected. A photoelectric sensor characterized in that the signal processing circuit is constituted by a PUT that outputs a determination signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP850388U JPH01113792U (en) | 1988-01-26 | 1988-01-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP850388U JPH01113792U (en) | 1988-01-26 | 1988-01-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01113792U true JPH01113792U (en) | 1989-07-31 |
Family
ID=31214435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP850388U Pending JPH01113792U (en) | 1988-01-26 | 1988-01-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01113792U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5826599A (en) * | 1981-07-22 | 1983-02-17 | ウエスチングハウス・エレクトリツク・コ−ポレ−シヨン | Device and method for reducing noise of generator |
| JPS59192939A (en) * | 1984-04-02 | 1984-11-01 | Matsushita Electric Works Ltd | Smoke sensor |
-
1988
- 1988-01-26 JP JP850388U patent/JPH01113792U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5826599A (en) * | 1981-07-22 | 1983-02-17 | ウエスチングハウス・エレクトリツク・コ−ポレ−シヨン | Device and method for reducing noise of generator |
| JPS59192939A (en) * | 1984-04-02 | 1984-11-01 | Matsushita Electric Works Ltd | Smoke sensor |
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