JPS5565101A - Measuring system for width - Google Patents

Measuring system for width

Info

Publication number
JPS5565101A
JPS5565101A JP13821478A JP13821478A JPS5565101A JP S5565101 A JPS5565101 A JP S5565101A JP 13821478 A JP13821478 A JP 13821478A JP 13821478 A JP13821478 A JP 13821478A JP S5565101 A JPS5565101 A JP S5565101A
Authority
JP
Japan
Prior art keywords
signal
bar code
circuit
differentiation
signals
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
JP13821478A
Other languages
Japanese (ja)
Other versions
JPS619669B2 (en
Inventor
Shunji Kitagawa
Hiroyuki Ikeda
Katsumi Fujiwara
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP13821478A priority Critical patent/JPS5565101A/en
Publication of JPS5565101A publication Critical patent/JPS5565101A/en
Publication of JPS619669B2 publication Critical patent/JPS619669B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Length Measuring Devices By Optical Means (AREA)

Abstract

PURPOSE: To enable to measure the width of bar code accurately, by differentiation the signal scanning the bar code with photo spot and combinating the binary signals slicing the differential signals of the positive and negative envelope and each differentiation signals.
CONSTITUTION: The positive envelope waveform PE is obtained by feeding the first order differentiation waveform FDS with the analog signal BAS fed to the differentiation circuit 1 in which the bar code BCD is in photo scanning, to the positive envelope detection circuit 2 and similarly the negative envelope waveform NE is obtained at the negative envelope circuit 3, to produce the difference signals PED and NED between respectively the signal waveforms PE, NE and the said first order differentiation waveform FDS. The binary signals SL1 and SL2 are obtained by feeding the waveforms of the difference signals to the circuit 6 and 7 slicing with a given slice level. Since SL1 is the signal showing the leading of the bar code signal and SL2 is the signal representing the trailing, the bar code digital signal BCDS can be obtained with the synthesis of them at the combination circuit 8.
COPYRIGHT: (C)1980,JPO&Japio
JP13821478A 1978-11-09 1978-11-09 Measuring system for width Granted JPS5565101A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13821478A JPS5565101A (en) 1978-11-09 1978-11-09 Measuring system for width

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13821478A JPS5565101A (en) 1978-11-09 1978-11-09 Measuring system for width

Publications (2)

Publication Number Publication Date
JPS5565101A true JPS5565101A (en) 1980-05-16
JPS619669B2 JPS619669B2 (en) 1986-03-25

Family

ID=15216741

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13821478A Granted JPS5565101A (en) 1978-11-09 1978-11-09 Measuring system for width

Country Status (1)

Country Link
JP (1) JPS5565101A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55143682A (en) * 1979-04-24 1980-11-10 Fujitsu Ltd Read system for bar code information
JPS60157678A (en) * 1984-01-27 1985-08-17 Usac Electronics Ind Co Ltd Amplifying circuit of bar code reader
JPS60157676A (en) * 1984-01-27 1985-08-17 Usac Electronics Ind Co Ltd Device for detecting mark
JPS6154571A (en) * 1984-08-24 1986-03-18 Nippon Electric Ind Co Ltd Bar code reader
JPS6159571A (en) * 1984-08-31 1986-03-27 Nippon Electric Ind Co Ltd Bar code reader
US5061843A (en) * 1989-05-30 1991-10-29 Fujitsu Limited Circuit for processing analog signal obtained by scanning bar code

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55143682A (en) * 1979-04-24 1980-11-10 Fujitsu Ltd Read system for bar code information
JPS6131911B2 (en) * 1979-04-24 1986-07-23 Fujitsu Ltd
JPS60157678A (en) * 1984-01-27 1985-08-17 Usac Electronics Ind Co Ltd Amplifying circuit of bar code reader
JPS60157676A (en) * 1984-01-27 1985-08-17 Usac Electronics Ind Co Ltd Device for detecting mark
JPH0120792B2 (en) * 1984-01-27 1989-04-18 Pfu Ltd
JPS6154571A (en) * 1984-08-24 1986-03-18 Nippon Electric Ind Co Ltd Bar code reader
JPS6159571A (en) * 1984-08-31 1986-03-27 Nippon Electric Ind Co Ltd Bar code reader
US5061843A (en) * 1989-05-30 1991-10-29 Fujitsu Limited Circuit for processing analog signal obtained by scanning bar code

Also Published As

Publication number Publication date
JPS619669B2 (en) 1986-03-25

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