JPS5617474A - Bar-code read system - Google Patents
Bar-code read systemInfo
- 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
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
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5520585A (en) * | 1978-07-31 | 1980-02-14 | Sharp Corp | Demodulating system for bar-code signal |
-
1979
- 1979-07-21 JP JP9291379A patent/JPS5617474A/en active Pending
Patent Citations (1)
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)
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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