JPS647433U - - Google Patents
Info
- Publication number
- JPS647433U JPS647433U JP10089487U JP10089487U JPS647433U JP S647433 U JPS647433 U JP S647433U JP 10089487 U JP10089487 U JP 10089487U JP 10089487 U JP10089487 U JP 10089487U JP S647433 U JPS647433 U JP S647433U
- Authority
- JP
- Japan
- Prior art keywords
- light
- voltage
- input terminal
- receiving
- reference voltage
- 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
- 239000003990 capacitor Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 1
Landscapes
- Switches Operated By Changes In Physical Conditions (AREA)
- Electronic Switches (AREA)
Description
第１図はこの考案に係る実施例を示す光電スイ
ツチの回路図、第２図は透過形光電スイツチの原
理説明図で、同図ａは開放時のもの、同図ｂは遮
蔽時のもの、第３図は反射形光電スイツチの原理
説明図で、同図ａは入射光が強い時のもの、同図
ｂは入射光が弱い時のもの、第４図は従来の光電
スイツチの回路図である。
符号説明、１：光電センサ、１ａ：発光ダイオ
ード、１ｂ：フオト・トランジスタ、２，５，６
：抵抗、３：ダイオード、４：コンデンサ、７：
比較器。
FIG. 1 is a circuit diagram of a photoelectric switch showing an embodiment of this invention, and FIG. 2 is a diagram explaining the principle of a transmission type photoelectric switch. Figure 3 is a diagram explaining the principle of a reflective photoelectric switch. Figure a shows the switch when the incident light is strong, Figure b shows the switch when the incident light is weak, and Figure 4 shows the circuit diagram of a conventional photoelectric switch. be. Explanation of symbols, 1: Photoelectric sensor, 1a: Light emitting diode, 1b: Photo transistor, 2, 5, 6
: Resistor, 3: Diode, 4: Capacitor, 7:
Comparator.
Claims (1)
さに基づいて光電流を出力する受光素子と；前記
光電流を流した抵抗の両端の受光電圧が一方の入
力端子に、また基準電圧が他方の入力端子にそれ
ぞれ印加され、前記受光電圧と前記基準電圧との
比較に基づき、前記対象物の位置に対応して出力
がオン・オフされる比較器と；を具備するスイツ
チにおいて、前記基準電圧は、前記受光電圧をダ
イオードを介してコンデンサに印加させたときの
充電電圧が所定比率で分圧された値をもつことを
特徴とする光電スイツチ。 A light-receiving element outputs a photocurrent based on the intensity of the incident light, which changes in binary value depending on the position of the object; the light-receiving voltage at both ends of the resistor through which the photocurrent flows is connected to one input terminal; is applied to the other input terminal, and the output is turned on or off in accordance with the position of the object based on a comparison between the light reception voltage and the reference voltage; 1. A photoelectric switch, wherein the reference voltage has a value obtained by dividing a charging voltage at a predetermined ratio when the light receiving voltage is applied to a capacitor via a diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10089487U JPS647433U (en) | 1987-06-30 | 1987-06-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10089487U JPS647433U (en) | 1987-06-30 | 1987-06-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS647433U true JPS647433U (en) | 1989-01-17 |
Family
ID=31329386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10089487U Pending JPS647433U (en) | 1987-06-30 | 1987-06-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS647433U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4870871A (en) * | 1971-12-27 | 1973-09-26 | ||
| JPS5274874A (en) * | 1975-12-18 | 1977-06-23 | Koyo Denshi Kougiyou Kk | Photoelectric detection device |
-
1987
- 1987-06-30 JP JP10089487U patent/JPS647433U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4870871A (en) * | 1971-12-27 | 1973-09-26 | ||
| JPS5274874A (en) * | 1975-12-18 | 1977-06-23 | Koyo Denshi Kougiyou Kk | Photoelectric detection device |