JPS55143682A - Read system for bar code information - Google Patents
Read system for bar code informationInfo
- Publication number
- JPS55143682A JPS55143682A JP5061379A JP5061379A JPS55143682A JP S55143682 A JPS55143682 A JP S55143682A JP 5061379 A JP5061379 A JP 5061379A JP 5061379 A JP5061379 A JP 5061379A JP S55143682 A JPS55143682 A JP S55143682A
- Authority
- JP
- Japan
- Prior art keywords
- signals
- code information
- delay
- systems
- 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
Links
Landscapes
- Character Input (AREA)
- Manipulation Of Pulses (AREA)
Abstract
PURPOSE: To obtain a digital signal corresponding to the bar width of desired code information by extracting positive and negative delay signals of two systems from the differential output of an analog signal corresponding to the code information and then by combining signals obtained by level-slicing the outputs of both the systems.
CONSTITUTION: Bar code information recorded on a recording medium is optically read. Then, the obtained signal is supplied via signal input terminal 1 to differentiating circuit 11, which differentiates an analog signal, corresponding to the bar code, and then supplies its output to delay circuit 12 and slicing circuits 15 and 16. A signal delayed by this delay circuit 12 is input to envelope circuits 13 and 14 to extract delay signals of two systems corresponding to the differential signals of positive and negative polarities. The delay signals of two systems are input to slicing circuits 15 and 16, which level-slice the differential signals from circuit 11 on the basis of the delay signals, and the level-sliced signals are combined by digital signal extracting circuit 17, thereby outputting to signal output terminal 2 a digital signal corresponding to the bar width of desired bar code information.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5061379A JPS55143682A (en) | 1979-04-24 | 1979-04-24 | Read system for bar code information |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5061379A JPS55143682A (en) | 1979-04-24 | 1979-04-24 | Read system for bar code information |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55143682A true JPS55143682A (en) | 1980-11-10 |
JPS6131911B2 JPS6131911B2 (en) | 1986-07-23 |
Family
ID=12863816
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5061379A Granted JPS55143682A (en) | 1979-04-24 | 1979-04-24 | Read system for bar code information |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55143682A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60157676A (en) * | 1984-01-27 | 1985-08-17 | Usac Electronics Ind Co Ltd | Device for detecting mark |
JPS60157678A (en) * | 1984-01-27 | 1985-08-17 | Usac Electronics Ind Co Ltd | Amplifying circuit of bar code reader |
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 |
US7007847B2 (en) | 2003-02-21 | 2006-03-07 | Fujitsu Limited | Bar-code reader and method of reading bar-code |
US7021545B2 (en) | 2003-02-21 | 2006-04-04 | Fujitsu Limited | Bar-code reader, method of reading a bar code and computer product |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5565101A (en) * | 1978-11-09 | 1980-05-16 | Fujitsu Ltd | Measuring system for width |
-
1979
- 1979-04-24 JP JP5061379A patent/JPS55143682A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5565101A (en) * | 1978-11-09 | 1980-05-16 | Fujitsu Ltd | Measuring system for width |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60157676A (en) * | 1984-01-27 | 1985-08-17 | Usac Electronics Ind Co Ltd | Device for detecting mark |
JPS60157678A (en) * | 1984-01-27 | 1985-08-17 | Usac Electronics Ind Co Ltd | Amplifying circuit of bar code reader |
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 |
US7007847B2 (en) | 2003-02-21 | 2006-03-07 | Fujitsu Limited | Bar-code reader and method of reading bar-code |
US7021545B2 (en) | 2003-02-21 | 2006-04-04 | Fujitsu Limited | Bar-code reader, method of reading a bar code and computer product |
US7083101B2 (en) | 2003-02-21 | 2006-08-01 | Fujitsu Limited | Bar-code reader and method of reading bar-code |
Also Published As
Publication number | Publication date |
---|---|
JPS6131911B2 (en) | 1986-07-23 |
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