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Signal processing apparatus and method 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • G06K-007/10
출원번호 US-0786290 (1991-11-01)
발명자 / 주소
  • Elliott Randy D. (Eugene OR) Loris Blaine F. (Eugene OR)
출원인 / 주소
  • Spectra-Physics Scanning System, Inc. (Eugene OR 02)
인용정보 피인용 횟수 : 47  인용 특허 : 0

초록 ▼

A signal processing apparatus and method adapted for use in bar code scanners is described. The apparatus forms a derivative signal, and utilizes the derivative signal to detect transition points from white to black bars and vice-versa. Then, the apparatus starts and stops the generation of digital

대표청구항 ▼

A digitizing circuit comprising: first circuit means, configured to have a bandwidth in the range of between about 500 Hz-100 KHz, for forming a first signal representative of a derivative of an analog signal, the analog signal being representative of the intensity of the light reflected off a bar c

이 특허를 인용한 특허 (47)

  1. Lucera, Mark G.; Check, Frank; Knowles, C. Harry; Zhu, Xiaoxun, ANALOG SCAN DATA SIGNAL PROCESSOR EMPLOYING A TIME-DOMAIN SUBSTRATE NOISE FILTER FOR NON-LINEARLY PROCESSING ANALOG SCAN DATA SIGNALS AND REDUCING SUBSTRATE NOISE SIGNAL LEVELS THEREIN PRIOR TO FIRST.
    상세보기
  2. Iwaguchi,Isao; Miyazawa,Hideo; Watanabe,Mitsuo; Yamazaki,Kozo; Ohkawa,Masanori, Bar-code reader and method of reading bar code.
    상세보기
  3. Tafoya Benny R., CCD-base bar code scanner.
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  4. Shearer Frank W., CCD-based bar code scanner.
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  5. Tafoya Benny R., CCD-based bar code scanner.
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  6. Yoder, R. Craig; Tatsumi, Yoshikazu; Lo, Tse-Min, Data storage mechanism and communication mechanism for portable dosimeter.
    상세보기
  7. Yoder, R. Craig; Tatsumi, Yoshikazu, Dosimeter sled.
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  8. Yoder, R. Craig, Dosimeter with RFID tag.
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  9. Yoder, R. Craig, Dosimeter with RFID tag.
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  10. Colley James E. ; O'Donnell Patrick M., Electronic edge detection system using a second derivative signal processor.
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  11. Rudeen, Robert William, Enhanced virtual scan line processing.
    상세보기
  12. Yoder, R. Craig, Filters for use in dosimetry.
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  13. Yoder, R. Craig; Tatsumi, Yoshikazu; Lo, Tse-Min; Akselrod, Mark S., Filters for use in dosimetry.
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  14. Yoder, R. Craig; Tatsumi, Yoshikazu; Lo, Tse-Min; Akselrod, Mark S., Filters for use in dosimetry.
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  15. Patel, Gordhanbhai N., General purpose, high accuracy dosimeter reader.
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  16. Mark Lucera ; Frank Check ; C. Harry Knowles ; Xiaoxun Zhu ; LeRoy Dickson, Laser scanning bar code symbol reader employing variable pass-band filter structures having frequency response characteristics controlled by time-measurement of laser-scanned bar code symbol.
    상세보기
  17. Lucera,Mark; Check,Frank; Knowles,C. Harry; Zhu,Xiaoxun; Dickson,LeRoy, Laser scanning bar code symbol reader employing variable passband filter structures having frequency response characteristics controlled by time-measurement of laser-scanned bar code symbol elements.
    상세보기
  18. Lucera, Mark G.; Check, Frank; Knowles, C. Harry; Zhu, Xiaoxun, METHOD OF AND APPARATUS FOR PROCESSING ANALOG SCAN DATA SIGNALS DERIVED BY SCANNING BAR CODE SYMBOLS USING A LASER BEAM, WHEREIN A REAL-TIME BAR CODE ELEMENT DETECTOR IS USED TO CONTROL THE DETECTION.
    상세보기
  19. Mark Lucera ; Frank Check ; C. Harry Knowles ; Xiaoxun Zhu, METHOD OF AND APPARATUS FOR PROCESSING ANALOG SCAN DATA SIGNALS DERIVED WHILE SCANNING A BAR CODE SYMBOL USING A LASER BEAM, WHEREIN THE DETECTED BEAM SPOT SPEED OF SAID LASER BEAM IS USED TO DYNAMIC.
    상세보기
  20. Lucera, Mark; Check, Frank; Knowles, C. Harry; Zhu, Xiaoxun; Dickson, LeRoy, METHOD OF AND SYSTEM FOR SCANNING BAR CODE SYMBOLS USING A LASER SCANNING PATTERN HAVING MULTIPLE FOCAL ZONES, WHEREIN THE MINIMUM BEAM DIMENSION/MINIMUM BAR WIDTH (MBD/MBW) RATIO IS GREATER THAN OR .
    상세보기
  21. Mark Lucera ; Frank Check ; C. Harry Knowles ; Xiaoxun Zhu ; LeRoy Dickson, MULTI-FOCAL LASER SCANNING BAR CODE SYMBOL READING SYSTEM EMPLOYING A SCAN DATA SIGNAL PROCESSOR HAVING A VARIABLE PASS-BAND FILTER STRUCTURE WITH FREQUENCY CHARACTERISTICS CONTROLLED BY DETECTING TH.
    상세보기
  22. Lucera, Mark; Check, Frank; Knowles, C. Harry; Zhu, Xiaoxun; Dickson, LeRoy, MULTI-FOCAL LASER SCANNING BAR CODE SYMBOL READING SYSTEM EMPLOYING A SCAN DATA SIGNAL PROCESSOR HAVING A VARIABLE PASS-BAND FILTER STRUCTURE WITH FREQUENCY CHARACTERISTICS CONTROLLED BY MEASURING TH.
    상세보기
  23. Lucera, Mark; Check, Frank; Knowles, C. Harry; Zhu, Xiaoxun; Dickson, LeRoy, MULTI-FOCAL LASER SCANNING BAR CODE SYMBOL READING SYSTEM EMPLOYING A VARIABLE SECOND DERIVATIVE SIGNAL PASS-BAND FILTER STRUCTURE HAVING FREQUENCY CHARACTERISTICS THAT ARE CONTROLLED IN A REAL-TIME .
    상세보기
  24. Spitz Glenn Steven, Method and apparatus supporting high speed evaluation of bar code indicia.
    상세보기
  25. Spitz Glenn S. (Northport NY), Method and apparatus to enable the high speed evaluation of bar code indicia.
    상세보기
  26. Piva, Marco; Bianchi, Maurizio, Method and device for compensating undesired variations in an electrical signal generated by an optical code reader.
    상세보기
  27. Benedetti, Michele, Method for locating the transitions between the elements of a bar code.
    상세보기
  28. Hong Tang ; Donald Alexander Collins, Jr. ; Kenneth Joseph Fabian ; Barry Myron Merganthaler, Methods and apparatus for digitizing and processing of analog barcode signals.
    상세보기
  29. John K. Burkey ; Barry M. Mergenthaler ; Hong Tang, Methods and apparatus for dual channel video recovery in bar code scanners.
    상세보기
  30. Tang, Hong, Methods and apparatus for dual thresholding in processing of barcode signals.
    상세보기
  31. Lucera, Mark; Ralph, Joseph, Multipath scan data signal processor having multiple signal processing paths with different operational characteristics to enable processing of signals having increased dynamic range.
    상세보기
  32. Boersma Gerrit,NLX, Optical device for reading and decoding a barcode.
    상세보기
  33. Yoder, R. Craig; Akselrod, Mark S.; Fomenko, Vasiliy V., Optical system for dosimeter reader.
    상세보기
  34. Yoder, R. Craig; Tatsumi, Yoshikazu; Lo, Tse-Min; Akselrod, Mark S., Portable dosimeter.
    상세보기
  35. Yoder, R. Craig; Tatsumi, Yoshikazu; Lo, Tse-Min; Akselrod, Mark S., Portable reader for a dosimeter.
    상세보기
  36. Yoder, R. Craig; Akselrod, Mark S.; Dillin, Kent J.; Fomenko, Vasiliy V.; Johnson, David F.; Tatsumi, Yoshikazu; Lo, Tse-Min, Power system for dosimeter reader.
    상세보기
  37. Yoder, R. Craig; Akselrod, Mark S.; Dillin, Kent J.; Fomenko, Vasiliy V.; Johnson, David F.; Tatsumi, Yoshikazu; Lo, Tse-Min, Power system for dosimeter reader.
    상세보기
  38. Yoder, R. Craig; Akselrod, Mark S.; Dillin, Kent J.; Fomenko, Vasiliy V.; Johnson, David F.; Tatsumi, Yoshikazu; Lo, Tse-Min, Power system for dosimeter reader.
    상세보기
  39. Yoder, R. Craig; Akselrod, Mark S.; Dillin, Kent J.; Fomenko, Vasiliy V.; Johnson, David F.; Tatsumi, Yoshikazu; Lo, Tse-Min, Power system for dosimeter reader.
    상세보기
  40. Yoder, R. Craig; Akselrod, Mark S.; Dillin, Kent J.; Fomenko, Vasiliy V.; Johnson, David F.; Tatsumi, Yoshikazu; Lo, Tse-Min, Power system for dosimeter reader.
    상세보기
  41. Zhou, Weiyang, Prioritized virtual scan line processing.
    상세보기
  42. Yoder, R. Craig, RFID tag for use in dosimetry.
    상세보기
  43. Yoder, R. Craig; Akselrod, Mark S.; Tatsumi, Yoshikazu; Lo, Tse-Min, Reading mechanism for dosimeter.
    상세보기
  44. Mark Lucera ; Frank Check ; C. Harry Knowles ; Xiaoxun Zhu ; LeRoy Dickson, Reading system a variable pass-band.
    상세보기
  45. Mark G. Lucera ; C. Harry Knowles ; Xiaoxun Zhu, SCAN DATA SIGNAL PROCESSOR EMPLOYING PASS-BAND FILTER STRUCTURES HAVING FREQUENCY RESPONSE CHARACTERISTICS DYNAMICALLY SWITCHED INTO OPERATION BY CONTROL SIGNALS INDICATIVE OF THE FOCAL ZONE OF THE L.
    상세보기
  46. Lucera, Mark G.; Check, Frank; Knowles, C. Harry; Zhu, Xiaoxun, Scan data signal processor employing band-pass filter having frequency response characteristics controlled by the depth of focus of the laser scanning beam.
    상세보기
  47. Bridgelall Raj, Scanning system and method of operation with intelligent automatic gain control.
    상세보기

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