JPS5729985A - Detection level adjusting device - Google Patents
Detection level adjusting deviceInfo
- Publication number
- JPS5729985A JPS5729985A JP10430180A JP10430180A JPS5729985A JP S5729985 A JPS5729985 A JP S5729985A JP 10430180 A JP10430180 A JP 10430180A JP 10430180 A JP10430180 A JP 10430180A JP S5729985 A JPS5729985 A JP S5729985A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- value
- stored
- detection output
- detection
- 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)
- Measurement Of Current Or Voltage (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
PURPOSE:To automatically set a reference level and to automatically discriminate whether paper, a liquid, etc. exist or not, by storing a reference level for detection, in a memory, in a copying machine, etc. CONSTITUTION:An analog output of a photodetecting part consisting of a resistance R5 and a photoelectric conversion element OE2 is supplied to an AD converter ADC, and its converted output is stored in a memory ME through a control device CTL. When paper P is inserted and an optical path emitted from a lamp L to OE2 is shut off, a detection output becomes maximum. On the other hand, when the paper P is drawn out and a light beam from the lamp L is made incident to OE2, the detection output becomes minimum. CTL calculates an intermediate value as a reference value from a maximum value and a minimum value of MEM, and this reference value is stored in MEM. In case when paper is detected, whether it exists or not is decided by relation of magnitude between said stored reference value and the detection output.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10430180A JPS5729985A (en) | 1980-07-31 | 1980-07-31 | Detection level adjusting device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10430180A JPS5729985A (en) | 1980-07-31 | 1980-07-31 | Detection level adjusting device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5729985A true JPS5729985A (en) | 1982-02-18 |
Family
ID=14377094
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10430180A Pending JPS5729985A (en) | 1980-07-31 | 1980-07-31 | Detection level adjusting device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5729985A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5938677A (en) * | 1982-08-27 | 1984-03-02 | Ricoh Co Ltd | Detection apparatus |
JPS5970991A (en) * | 1982-10-18 | 1984-04-21 | Ricoh Co Ltd | Light regulation system |
JPS59170783A (en) * | 1983-03-17 | 1984-09-27 | Nec Corp | Form detector |
JPS6054661A (en) * | 1983-09-02 | 1985-03-29 | Nisshin Oil Mills Ltd:The | Making of fish chips |
JPS62215888A (en) * | 1986-03-18 | 1987-09-22 | Sharp Corp | Photoelectric type matter detection system |
JPS62215887A (en) * | 1986-03-18 | 1987-09-22 | Sharp Corp | Photoelectric type matter detection system |
JPH0387685A (en) * | 1989-08-30 | 1991-04-12 | Koufu Nippon Denki Kk | Photosensor signal detecting circuit |
-
1980
- 1980-07-31 JP JP10430180A patent/JPS5729985A/en active Pending
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5938677A (en) * | 1982-08-27 | 1984-03-02 | Ricoh Co Ltd | Detection apparatus |
JPS5970991A (en) * | 1982-10-18 | 1984-04-21 | Ricoh Co Ltd | Light regulation system |
JPH0350995B2 (en) * | 1982-10-18 | 1991-08-05 | Ricoh Kk | |
JPS59170783A (en) * | 1983-03-17 | 1984-09-27 | Nec Corp | Form detector |
JPS6054661A (en) * | 1983-09-02 | 1985-03-29 | Nisshin Oil Mills Ltd:The | Making of fish chips |
JPS6233852B2 (en) * | 1983-09-02 | 1987-07-23 | Nisshin Oil Mills Ltd | |
JPS62215888A (en) * | 1986-03-18 | 1987-09-22 | Sharp Corp | Photoelectric type matter detection system |
JPS62215887A (en) * | 1986-03-18 | 1987-09-22 | Sharp Corp | Photoelectric type matter detection system |
JPH0387685A (en) * | 1989-08-30 | 1991-04-12 | Koufu Nippon Denki Kk | Photosensor signal detecting circuit |
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