JPS5797182A - Photoelectric reader - Google Patents

Photoelectric reader

Info

Publication number
JPS5797182A
JPS5797182A JP17229680A JP17229680A JPS5797182A JP S5797182 A JPS5797182 A JP S5797182A JP 17229680 A JP17229680 A JP 17229680A JP 17229680 A JP17229680 A JP 17229680A JP S5797182 A JPS5797182 A JP S5797182A
Authority
JP
Japan
Prior art keywords
signal
positive
negative
measured
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.)
Granted
Application number
JP17229680A
Other languages
Japanese (ja)
Other versions
JPS634226B2 (en
Inventor
Shoichi Kunieda
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.)
Brother Industries Ltd
Original Assignee
Brother Industries 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 Brother Industries Ltd filed Critical Brother Industries Ltd
Priority to JP17229680A priority Critical patent/JPS5797182A/en
Publication of JPS5797182A publication Critical patent/JPS5797182A/en
Publication of JPS634226B2 publication Critical patent/JPS634226B2/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)
  • Closed-Circuit Television Systems (AREA)
  • Image Input (AREA)

Abstract

PURPOSE:To obtain a device capable of detecting the center position of a body to be measured which has constant width with high precision by generating an electric signal at the zero point of a signal obtained by differentiating an output signal from a hpotoelectric readout member. CONSTITUTION:An output signal SG1 from a photoelectric readout member 20, which has a readout visual field L nearly as wide as a body 12 to be measured and generates the signal SG1 when the body 12 to be measured enters into and exits from the visual field L, is inputted to a differentiating circuit 42 to output a differential signal SG3 which varies from a positive to a negative level or a negative to a positive level. Then, a signal generating circuit consisting of a comparator circuit 46 which has, for example, hysteresis, monostable multivibrator circuit 52 and 55, etc., outputs an electric signal SG7 nearly at the zero point where the differential signal SG3 varies from the positive to the negetive or the negative to the positive point.
JP17229680A 1980-12-05 1980-12-05 Photoelectric reader Granted JPS5797182A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17229680A JPS5797182A (en) 1980-12-05 1980-12-05 Photoelectric reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17229680A JPS5797182A (en) 1980-12-05 1980-12-05 Photoelectric reader

Publications (2)

Publication Number Publication Date
JPS5797182A true JPS5797182A (en) 1982-06-16
JPS634226B2 JPS634226B2 (en) 1988-01-28

Family

ID=15939292

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17229680A Granted JPS5797182A (en) 1980-12-05 1980-12-05 Photoelectric reader

Country Status (1)

Country Link
JP (1) JPS5797182A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0436661U (en) * 1990-07-18 1992-03-27

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0470081U (en) * 1990-10-27 1992-06-22

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0436661U (en) * 1990-07-18 1992-03-27

Also Published As

Publication number Publication date
JPS634226B2 (en) 1988-01-28

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