JPS6475925A - Automatic gain control apparatus - Google Patents
Automatic gain control apparatusInfo
- Publication number
- JPS6475925A JPS6475925A JP62232575A JP23257587A JPS6475925A JP S6475925 A JPS6475925 A JP S6475925A JP 62232575 A JP62232575 A JP 62232575A JP 23257587 A JP23257587 A JP 23257587A JP S6475925 A JPS6475925 A JP S6475925A
- Authority
- JP
- Japan
- Prior art keywords
- gain
- optical sensor
- correcting
- level
- output level
- 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
Landscapes
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Geophysics And Detection Of Objects (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
Abstract
PURPOSE:To make the following to the output fluctuation of an optical sensor quick, by correcting the gain, which is obtained with a first comparing means from the output level of the optical sensor when an object is absent, by the gain correcting amount, which is obtained by a second comparing means and an updating means from the past output level of the optical sensor when the object is present. CONSTITUTION:A variable gain amplifying means 11, comparing means 12a and 13a, an updating means 15 and a correcting means 16 are provided in this apparatus. Then, the output level of the means 11 when an object is absent is made to be a non-existence level 3 by the means 12a. The gain, when error becomes the minimum value, is outputted to the means 16. Meanwhile the output level of the means 11 is compared with the preset existence-level reference amount 8 in the means 13a. The ratio with respect to the reference amount is outputted to the means 15 as the amount of the error. Then the reciprocal of the ratio from the means 13a is obtained, and the correcting value is updated and sent to the means 16 with the means 15. The gain from the means 12a is multiplied in the means 16 and the gain is corrected. The result is set in the means 11, and the adjusted output 7 of the optical sensor is obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62232575A JPS6475925A (en) | 1987-09-18 | 1987-09-18 | Automatic gain control apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62232575A JPS6475925A (en) | 1987-09-18 | 1987-09-18 | Automatic gain control apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6475925A true JPS6475925A (en) | 1989-03-22 |
JPH0547054B2 JPH0547054B2 (en) | 1993-07-15 |
Family
ID=16941496
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62232575A Granted JPS6475925A (en) | 1987-09-18 | 1987-09-18 | Automatic gain control apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6475925A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01316892A (en) * | 1988-06-17 | 1989-12-21 | Inoue Hiroaki | Paper money discriminating method |
JPH06333124A (en) * | 1993-05-24 | 1994-12-02 | Micro Pack:Kk | Paper money identification method |
JP2009122120A (en) * | 2008-03-31 | 2009-06-04 | Yamatake Corp | Sensor device |
JP2013203527A (en) * | 2012-03-28 | 2013-10-07 | Murata Machinery Ltd | Yarn unevenness signal detecting device and yarn winder |
KR101518035B1 (en) * | 2014-01-27 | 2015-05-06 | 호남대학교 산학협력단 | banknote identifying machine and method of identifying banknote |
JP2017015837A (en) * | 2015-06-29 | 2017-01-19 | 株式会社リコー | Human body detection device |
JP2019184437A (en) * | 2018-04-11 | 2019-10-24 | コーデンシ株式会社 | Optical sensor and counter |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4957254B2 (en) * | 2007-01-09 | 2012-06-20 | オムロン株式会社 | Photoelectric sensor and photoelectric sensor light receiving unit |
-
1987
- 1987-09-18 JP JP62232575A patent/JPS6475925A/en active Granted
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01316892A (en) * | 1988-06-17 | 1989-12-21 | Inoue Hiroaki | Paper money discriminating method |
JPH06333124A (en) * | 1993-05-24 | 1994-12-02 | Micro Pack:Kk | Paper money identification method |
JP2009122120A (en) * | 2008-03-31 | 2009-06-04 | Yamatake Corp | Sensor device |
JP2013203527A (en) * | 2012-03-28 | 2013-10-07 | Murata Machinery Ltd | Yarn unevenness signal detecting device and yarn winder |
KR101518035B1 (en) * | 2014-01-27 | 2015-05-06 | 호남대학교 산학협력단 | banknote identifying machine and method of identifying banknote |
JP2017015837A (en) * | 2015-06-29 | 2017-01-19 | 株式会社リコー | Human body detection device |
JP2019184437A (en) * | 2018-04-11 | 2019-10-24 | コーデンシ株式会社 | Optical sensor and counter |
Also Published As
Publication number | Publication date |
---|---|
JPH0547054B2 (en) | 1993-07-15 |
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