JPS5676034A - State detection circuit for material to be detected - Google Patents
State detection circuit for material to be detectedInfo
- Publication number
- JPS5676034A JPS5676034A JP15326479A JP15326479A JPS5676034A JP S5676034 A JPS5676034 A JP S5676034A JP 15326479 A JP15326479 A JP 15326479A JP 15326479 A JP15326479 A JP 15326479A JP S5676034 A JPS5676034 A JP S5676034A
- Authority
- JP
- Japan
- Prior art keywords
- phototransistor
- detected
- state
- light
- circuit
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
- G01V8/12—Detecting, e.g. by using light barriers using one transmitter and one receiver
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
PURPOSE:To simplify a circuit constitution and to make its size small by a method wherein a light emitting system and a light receiving system in a detection circuit are not constituted in separate bodies, but the two are connected in series and circuit parts are used in common. CONSTITUTION:An LED31 and a phototransistor 61 are connected in series. Here, if a material 5 to be detected interrupts a photoconductive passage, a phototransistor 61 is placed in a noncontinuity state and a current flows in a circuit composed of the radiative diode 31 and a resistor 15. Accordingly, the LED31 emits a light as it is. Since the phototransistor 61 is placed in a noncontinuity state, no voltage appears at an output terminal 12 between the phototransistor 61 and an output resistor 11, thus, maintaining a grounding potential. When, the material 5 to be detected moves from a light interruption state to a transmitting state, the phototransistor 61 is placed in a continuity state and a current runs between the phototransistor 61 and the output resistor 11, as a result, a voltage higher than the grounding voltage appears at the output terminal 12. This voltage varies in accordance with the quantity of light transmitting the material 5 to be detected, and the voltage value can be detected by the state of the material 5 to be detected. In this way, a circuit constitution can be simplified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15326479A JPS5676034A (en) | 1979-11-26 | 1979-11-26 | State detection circuit for material to be detected |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15326479A JPS5676034A (en) | 1979-11-26 | 1979-11-26 | State detection circuit for material to be detected |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5676034A true JPS5676034A (en) | 1981-06-23 |
Family
ID=15558646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15326479A Pending JPS5676034A (en) | 1979-11-26 | 1979-11-26 | State detection circuit for material to be detected |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5676034A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0295006A2 (en) * | 1987-06-10 | 1988-12-14 | Kabushiki Kaisha Toshiba | An optical sensor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51309U (en) * | 1974-06-17 | 1976-01-06 |
-
1979
- 1979-11-26 JP JP15326479A patent/JPS5676034A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51309U (en) * | 1974-06-17 | 1976-01-06 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0295006A2 (en) * | 1987-06-10 | 1988-12-14 | Kabushiki Kaisha Toshiba | An optical sensor |
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