JPS5617474A - Bar-code read system - Google Patents

Bar-code read system

Info

Publication number
JPS5617474A
JPS5617474A JP9291379A JP9291379A JPS5617474A JP S5617474 A JPS5617474 A JP S5617474A JP 9291379 A JP9291379 A JP 9291379A JP 9291379 A JP9291379 A JP 9291379A JP S5617474 A JPS5617474 A JP S5617474A
Authority
JP
Japan
Prior art keywords
bar
scanning
denoted
module value
found
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
Application number
JP9291379A
Other languages
Japanese (ja)
Inventor
Toshiyuki Yagi
Katsuo Higuchi
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP9291379A priority Critical patent/JPS5617474A/en
Publication of JPS5617474A publication Critical patent/JPS5617474A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To improve a read rate to variation in scanning speed by decoding the value of a bar found on the basis of values of widths of a white bar and black bar scanned right before it, when reading the width of the bar.
CONSTITUTION: A signal output from hand scanner 1 by scanning a JAN bar-code symbol is amplified and waveform-shaped by amplifying circuit 2, whose output is supplied to differentiating circit 3. Circuit 3 differentiates the rising part and falling part of the input signal and outputs it to CPU4. Then, CPU4 uses the output signal as an interruption signal to decode the bar-code symbole and also to exercise control. In this case, the module value of each white bar or black bar of the bar code is found by using expression 1. Here, the module value of a bar to be found is denoted as Mn and its scanning time as Tn; and the module value and scanning time of the bar immediately before it are denoted as Mn-1 and Tn-1, and the module value and scanning time of the bar further before it are denoted as Mn-2 and Tn-2. Consequently, the read rate can be improved even when the scanning speed of the hand scanner varies.
COPYRIGHT: (C)1981,JPO&Japio
JP9291379A 1979-07-21 1979-07-21 Bar-code read system Pending JPS5617474A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9291379A JPS5617474A (en) 1979-07-21 1979-07-21 Bar-code read system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9291379A JPS5617474A (en) 1979-07-21 1979-07-21 Bar-code read system

Publications (1)

Publication Number Publication Date
JPS5617474A true JPS5617474A (en) 1981-02-19

Family

ID=14067717

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9291379A Pending JPS5617474A (en) 1979-07-21 1979-07-21 Bar-code read system

Country Status (1)

Country Link
JP (1) JPS5617474A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5966792A (en) * 1982-10-07 1984-04-16 Sumitomo Rubber Ind Ltd Bar code and its discriminating method
US7007847B2 (en) 2003-02-21 2006-03-07 Fujitsu Limited Bar-code reader and method of reading bar-code

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5520585A (en) * 1978-07-31 1980-02-14 Sharp Corp Demodulating system for bar-code signal

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5520585A (en) * 1978-07-31 1980-02-14 Sharp Corp Demodulating system for bar-code signal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5966792A (en) * 1982-10-07 1984-04-16 Sumitomo Rubber Ind Ltd Bar code and its discriminating method
US7007847B2 (en) 2003-02-21 2006-03-07 Fujitsu Limited Bar-code reader and method of reading bar-code
US7083101B2 (en) 2003-02-21 2006-08-01 Fujitsu Limited Bar-code reader and method of reading bar-code

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