DE69022630D1 - Schaltung zur Verarbeitung eines Analogsignals, erhalten durch Abtastung eines Strichcodes. - Google Patents

Schaltung zur Verarbeitung eines Analogsignals, erhalten durch Abtastung eines Strichcodes.

Info

Publication number
DE69022630D1
DE69022630D1 DE69022630T DE69022630T DE69022630D1 DE 69022630 D1 DE69022630 D1 DE 69022630D1 DE 69022630 T DE69022630 T DE 69022630T DE 69022630 T DE69022630 T DE 69022630T DE 69022630 D1 DE69022630 D1 DE 69022630D1
Authority
DE
Germany
Prior art keywords
scanning
circuit
processing
bar code
analog signal
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.)
Expired - Fee Related
Application number
DE69022630T
Other languages
English (en)
Other versions
DE69022630T2 (de
Inventor
Shinichi Sato
Kazumasa Moriya
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
Application granted granted Critical
Publication of DE69022630D1 publication Critical patent/DE69022630D1/de
Publication of DE69022630T2 publication Critical patent/DE69022630T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
    • G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
    • G06K7/10851—Circuits for pulse shaping, amplifying, eliminating noise signals, checking the function of the sensing device
DE69022630T 1989-05-30 1990-05-30 Schaltung zur Verarbeitung eines Analogsignals, erhalten durch Abtastung eines Strichcodes. Expired - Fee Related DE69022630T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1136501A JPH07101429B2 (ja) 1989-05-30 1989-05-30 バーコードリーダーのアナログ信号処理方式

Publications (2)

Publication Number Publication Date
DE69022630D1 true DE69022630D1 (de) 1995-11-02
DE69022630T2 DE69022630T2 (de) 1996-03-21

Family

ID=15176642

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69022630T Expired - Fee Related DE69022630T2 (de) 1989-05-30 1990-05-30 Schaltung zur Verarbeitung eines Analogsignals, erhalten durch Abtastung eines Strichcodes.

Country Status (4)

Country Link
US (1) US5061843A (de)
EP (1) EP0400969B1 (de)
JP (1) JPH07101429B2 (de)
DE (1) DE69022630T2 (de)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5151580A (en) * 1990-08-03 1992-09-29 Symbol Technologies, Inc. Light emitting diode scanner
US5446272A (en) * 1989-06-16 1995-08-29 Symbol Technologies, Inc. System for digitizing a scanned signal indicating changes in signal intensity
US5612531A (en) * 1993-03-08 1997-03-18 Symbol Technologies, Inc. Bar code reader with multiple sensitivity modes using variable thresholding comparisons
US5408081A (en) * 1989-06-16 1995-04-18 Symbol Technologies, Inc. Digital circuit for a laser scanner using a first derivative signal and a comparison signal
US5828050A (en) * 1990-08-03 1998-10-27 Symbol Technologies, Inc. Light emitting laser diode scanner
US5268564A (en) * 1990-08-03 1993-12-07 Symbol Technologies, Inc. Bar code scanner actuated by detection of scanner motion
JPH04245581A (ja) * 1991-01-31 1992-09-02 Sumitomo Electric Ind Ltd 走査速度検出装置およびそれを用いた記号読取装置
US5329105A (en) * 1992-08-10 1994-07-12 United Parcel Service Of America, Inc. Method and apparatus for determining the width of elements of bar code symbols
US5461223A (en) * 1992-10-09 1995-10-24 Eastman Kodak Company Bar code detecting circuitry
US5355356A (en) * 1993-05-19 1994-10-11 Maxoptix Corporation Charge pump for restoring DC in an optical recording read channel
JP3240750B2 (ja) * 1993-06-03 2001-12-25 ソニー株式会社 二値化回路及び固体撮像装置
JP2815290B2 (ja) * 1993-08-11 1998-10-27 富士通株式会社 バーコードリーダーにおける二値化装置
JP3482689B2 (ja) * 1994-05-27 2003-12-22 ソニー株式会社 固体撮像装置及びこれを用いたバーコード読取り装置
JPH10162095A (ja) * 1996-11-29 1998-06-19 Fujitsu Ltd スライスレシオ制御回路
US6000616A (en) * 1997-05-12 1999-12-14 Webscan, Inc. Methods to determine and selectively sample positive and negative peak values occurring within a scan reflectance profile signal
US6382511B1 (en) 2000-04-26 2002-05-07 Ncr Corporation Methods and apparatus for digitizing and processing of analog barcode signals
US6502751B1 (en) 2000-04-26 2003-01-07 Ncr Corporation Methods and apparatus for dual thresholding in processing of barcode signals
DE60030985T2 (de) * 2000-11-14 2007-06-14 Datalogic S.P.A., Lippo Di Calderara Di Reno Verfahren zur Lokalisierung der Übergänge zwischen Teilen eines Streifenkodes
US6439460B1 (en) * 2000-12-15 2002-08-27 Yu-Chun Chang Instant synchronous automatic gain control apparatus
EP1357505A4 (de) * 2001-01-26 2006-02-08 Fujitsu Ltd Informationsleseverfahren und einrichtung, signalerfassungsverfahren für eine informationsleseeinrichtung, bandbegrenzungsverfahren dafür, zeitsteuerungspunktamplitudenextraktionsverfahren dafür und signalverarbeitungsverfahren dafür, lesesignalverarbeitungseinheit und lese s
JP5219943B2 (ja) * 2009-07-03 2013-06-26 株式会社オプトエレクトロニクス 二値化方法および二値化回路

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3716699A (en) * 1971-04-02 1973-02-13 A Eckert Method and apparatus for optical code reading
US3892949A (en) * 1974-04-22 1975-07-01 Rca Corp Circuit for determining the time of transitions in an alternating signal
US4000397A (en) * 1975-03-21 1976-12-28 Spectra-Physics, Inc. Signal processor method and apparatus
FR2439433A1 (fr) * 1978-10-19 1980-05-16 Cii Honeywell Bull Systeme de lecture de caracteres
JPS5565101A (en) * 1978-11-09 1980-05-16 Fujitsu Ltd Measuring system for width
US4219152A (en) * 1979-02-21 1980-08-26 International Business Machines Corporation Dual threshold comparator circuit
DE3014467A1 (de) * 1980-04-15 1981-11-12 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung zum erkennen von strichfoermigen markierungen
JP2641421B2 (ja) * 1985-03-22 1997-08-13 株式会社日立製作所 光学的検出方法、光学的情報再生装置、及び信号検出回路
US4740675A (en) * 1986-04-10 1988-04-26 Hewlett-Packard Company Digital bar code slot reader with threshold comparison of the differentiated bar code signal
JPS63127386A (ja) * 1986-11-18 1988-05-31 Tokyo Electric Co Ltd 画像情報読取装置の量子化回路

Also Published As

Publication number Publication date
DE69022630T2 (de) 1996-03-21
JPH032990A (ja) 1991-01-09
JPH07101429B2 (ja) 1995-11-01
EP0400969A1 (de) 1990-12-05
US5061843A (en) 1991-10-29
EP0400969B1 (de) 1995-09-27

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee