JPS56135286A - Label detector - Google Patents

Label detector

Info

Publication number
JPS56135286A
JPS56135286A JP3776680A JP3776680A JPS56135286A JP S56135286 A JPS56135286 A JP S56135286A JP 3776680 A JP3776680 A JP 3776680A JP 3776680 A JP3776680 A JP 3776680A JP S56135286 A JPS56135286 A JP S56135286A
Authority
JP
Japan
Prior art keywords
circuit
output
led1
decreases
light emission
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
Application number
JP3776680A
Other languages
Japanese (ja)
Other versions
JPS643744B2 (en
Inventor
Yasuhiro Sakura
Yasushi Nakajima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba TEC Corp
Original Assignee
Tokyo Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tokyo Electric Co Ltd filed Critical Tokyo Electric Co Ltd
Priority to JP3776680A priority Critical patent/JPS56135286A/en
Publication of JPS56135286A publication Critical patent/JPS56135286A/en
Publication of JPS643744B2 publication Critical patent/JPS643744B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
    • G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
    • G06K7/10851—Circuits for pulse shaping, amplifying, eliminating noise signals, checking the function of the sensing device

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Handling Of Sheets (AREA)
  • Labeling Devices (AREA)

Abstract

PURPOSE:To obtain a label detection signal stable in level even if optical conditions change, by controlling the quantity of light emission of a light emitting element with delay according to fluctuations of the output of a photodetector. CONSTITUTION:When the part of only base paper 8 reaches the optical axis position of LED1 and phototransistor TR5, the current of TR5 increases. Therefore, the output signal of detecting circuit 11 decreases and the current of current limiting circuit 4 also decreases to reduce the quantity of the light emission of LED1. On the other hand, when label 7 reaches the optical axis position, the output of TR5 decreases and the quantity of the light emission of LED1 increases. Thus, the output of impedance converting circuit 9 is compensated to a constant value invariably, but the transfer of the compensation is delayed by delay circuit 18. The output voltage of circuit 9 has only impedance decreased by impedance converting circuit 19 and is inputted to input terminals (+) and (-) of voltage comparing circuit 23 via level adjusting circuit 22 and smoothing circuit 26. Therefore, the large variation part of the input to terminal (+) is outputted as a label detection signal from circuit 23.
JP3776680A 1980-03-25 1980-03-25 Label detector Granted JPS56135286A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3776680A JPS56135286A (en) 1980-03-25 1980-03-25 Label detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3776680A JPS56135286A (en) 1980-03-25 1980-03-25 Label detector

Publications (2)

Publication Number Publication Date
JPS56135286A true JPS56135286A (en) 1981-10-22
JPS643744B2 JPS643744B2 (en) 1989-01-23

Family

ID=12506584

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3776680A Granted JPS56135286A (en) 1980-03-25 1980-03-25 Label detector

Country Status (1)

Country Link
JP (1) JPS56135286A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6020664U (en) * 1983-07-19 1985-02-13 関西日本電気株式会社 barcode reader
JPH02295774A (en) * 1989-05-11 1990-12-06 Nisshinbo Ind Inc Detecting method for label sheet of label printer and controlling method for operating timing of printer using the same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5310877U (en) * 1976-07-13 1978-01-30

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5310877U (en) * 1976-07-13 1978-01-30

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6020664U (en) * 1983-07-19 1985-02-13 関西日本電気株式会社 barcode reader
JPH0129644Y2 (en) * 1983-07-19 1989-09-08
JPH02295774A (en) * 1989-05-11 1990-12-06 Nisshinbo Ind Inc Detecting method for label sheet of label printer and controlling method for operating timing of printer using the same

Also Published As

Publication number Publication date
JPS643744B2 (en) 1989-01-23

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