JPS5588171A - Bar-code reader - Google Patents
Bar-code readerInfo
- Publication number
- JPS5588171A JPS5588171A JP16320578A JP16320578A JPS5588171A JP S5588171 A JPS5588171 A JP S5588171A JP 16320578 A JP16320578 A JP 16320578A JP 16320578 A JP16320578 A JP 16320578A JP S5588171 A JPS5588171 A JP S5588171A
- Authority
- JP
- Japan
- Prior art keywords
- bar
- register
- width
- count value
- decision
- 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
- 238000013139 quantization Methods 0.000 abstract 1
Abstract
PURPOSE: To make a decision on the width of a bar code without being influenced by a change in read speed, by varying a reference value for the decision on the width of the bar code following up a read scan speed.
CONSTITUTION: The width of a pulse signal, the output of quantization circuit 4, is counted by reference clocks and count value B is stored in register 6. The count value equivalent to each bar of register 6 is added by adder 7 so as to obtain T=ΣBi (i; the number of bars). This is divided by divider 8 by constant (2W+3N) and then multiplied by constant (W+N)/2 by multiplier 9. This product is supplied as a reference value to comparator 10; when the above-mentioned product is smaller than count value B corresponding to each bar of register 6, the bar is judged to be a thick bar and when greater, it is considered to be a thin bar.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16320578A JPS5588171A (en) | 1978-12-27 | 1978-12-27 | Bar-code reader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16320578A JPS5588171A (en) | 1978-12-27 | 1978-12-27 | Bar-code reader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5588171A true JPS5588171A (en) | 1980-07-03 |
Family
ID=15769272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16320578A Pending JPS5588171A (en) | 1978-12-27 | 1978-12-27 | Bar-code reader |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5588171A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61101880A (en) * | 1984-10-24 | 1986-05-20 | Sato :Kk | Barcode reading method and device |
| JPS6290776A (en) * | 1985-06-06 | 1987-04-25 | Sato :Kk | Barcode reading method and device |
| JPS62288985A (en) * | 1986-06-09 | 1987-12-15 | Fujitsu Kiden Ltd | Bar code demodulating device |
| US5408690A (en) * | 1990-10-01 | 1995-04-18 | Murata Mfg. Co., Ltd. | Antenna supervising apparatus comprising a standing wave ratio measuring unit |
| JP2011503712A (en) * | 2007-11-08 | 2011-01-27 | 株式会社オプトエレクトロニクス | Signal processing for light detection |
-
1978
- 1978-12-27 JP JP16320578A patent/JPS5588171A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61101880A (en) * | 1984-10-24 | 1986-05-20 | Sato :Kk | Barcode reading method and device |
| JPS6290776A (en) * | 1985-06-06 | 1987-04-25 | Sato :Kk | Barcode reading method and device |
| JPS62288985A (en) * | 1986-06-09 | 1987-12-15 | Fujitsu Kiden Ltd | Bar code demodulating device |
| US5408690A (en) * | 1990-10-01 | 1995-04-18 | Murata Mfg. Co., Ltd. | Antenna supervising apparatus comprising a standing wave ratio measuring unit |
| JP2011503712A (en) * | 2007-11-08 | 2011-01-27 | 株式会社オプトエレクトロニクス | Signal processing for light detection |
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