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公开(公告)号：BRPI0402512A
公开(公告)日：2005-05-24
申请号：BRPI0402512
申请日：2004-06-24
Applicant: XEROX CORP
Inventor： MARTENSON DAVID D , KNIERIM DAVID L
Abstract: The encoder has an optical encoder grating (17) that modulates a beam of light. A quadrature sensor (19) senses modulated light provided by the grating. The grating has two sets of encoder bars, where one set of encoder bars changes amplitude of an output of the quadrature sensor. An optical track provides a pattern alternating light and dark areas that are uniformly spaced and optically encoded to define preset position.
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公开(公告)号：BRPI0405107B1
公开(公告)日：2015-12-15
申请号：BRPI0405107
申请日：2004-11-24
Applicant: XEROX CORP
Inventor： REEVES BARRY D , JONES BRENT R , MARTENSON DAVID D , KNIERIM DAVID L , BURKE EDWARD F , JENSEN JAMES B , HILLS LEE D
Abstract: "processos de impressão a jato de tinta". a invenção refere-se a métodos para compensar jatos de tinta falhados em um aparelho de jato de tinta. o método em modalidades determina se um ou mais jatos de tinta não estão funcionando ou falharam e substitui o um ou mais jatos de tinta utilizando um ou mais jatos de tinta operacionais. os jatos de tinta operacionais utilizados são jatos de tinta operacionais vizinhos, que substituem o um ou mais jatos de tinta falhados. o um ou mais jatos de tinta falhados são desabilitados onde uma passagem de imagem primária é realizada seguida por um ou mais passes de formação de imagem adicionais para substituir o um ou mais jatos de tinta desabilitados habilitando um ou mais jatos de tinta operacionais vizinhos. os passes de formação de imagem adicionais podem ser um passe de formação de imagem de preenchimento à direita, um passe de formação de imagem de preenchimento à esquerda ou uma combinação de ambos.
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公开(公告)号：BRPI0901994A2
公开(公告)日：2010-04-13
申请号：BRPI0901994
申请日：2009-06-22
Applicant: XEROX CORP
Inventor： JONES MICHAEL E , MARTENSON DAVID D
Abstract: An encoder position signal processing system comprises an analog encoder reader and a codewheel. The codewheel possesses an optical track that modulates the quadrature encoder signal amplitude in order to generate an amplitude change (home pulse) once per revolution of the codewheel. The analog encoder reader outputs a quadrature signal comprised of sine and cosine signals. The quadrature signal is converted to a magnitude signal that is sampled in order to generate a rate of change (ROC) signal, which increases the signal-to-noise ratio. An algorithm using the characteristic shape of the ROC home pulse signal can then be applied to the ROC signal to increases robustness of detecting the home pulse.
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公开(公告)号：DE69629324D1
公开(公告)日：2003-09-11
申请号：DE69629324
申请日：1996-01-30
Applicant: XEROX CORP
Inventor： BURKE EDWARD F , PARKER MARK R , MARTENSON DAVID D
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公开(公告)号：CA2471390C
公开(公告)日：2012-08-14
申请号：CA2471390
申请日：2004-06-18
Applicant: XEROX CORP
Inventor： MARTENSON DAVID D , KNIERIM DAVID L
Abstract: An optical encoder that includes an optical grating and a quadrature optical encoder sensor that move relative to each other. The optical grating includes a first encoder bar and a plurality of second encoder bars, wherein the first encoder bar is optically configured to change an amplitude of an output of the quadrature optical encoder sensor.
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Patent Agency Ranking
公开(公告)号：CA2471390A1
公开(公告)日：2004-12-26
申请号：CA2471390
申请日：2004-06-18
Applicant: XEROX CORP
Inventor： KNIERIM DAVID L , MARTENSON DAVID D
Abstract: An optical encoder that includes an optical grating and a quadrature optical encoder sensor that move relative to each other. The optical grating includes a first encoder bar and a plurality of second encoder bars, wherein the firs t encoder bar is optically configured to change an amplitude of an output of the quadrature optical encoder sensor.
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公开(公告)号：DE69629324T2
公开(公告)日：2004-02-12
申请号：DE69629324
申请日：1996-01-30
Applicant: XEROX CORP
Inventor： BURKE EDWARD F , PARKER MARK R , MARTENSON DAVID D
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公开(公告)号：BRPI0901997A2
公开(公告)日：2010-04-13
申请号：BRPI0901997
申请日：2009-06-24
Applicant: XEROX CORP
Inventor： MARTENSON DAVID D , KNIERIM DAVID L
Abstract: An encoder home position sensing system and method is disclosed, which includes the use of an analog quadrature encoder reader and either a code wheel or a code strip. The code wheel possesses an optical track comprised of annular ring patterns, the thickness of which can be modulated by a sinusoidal function about the code wheel circumference, with one cycle of a sine wave corresponding to one encoder cycle. In one region of the optical track the amplitude of the sine function is changed to imbed an absolute reference home position. This region of the optical track can be sensed and used to determine an absolute system position. The linear code strip is similarly constructed with lines along the direction of motion, the thickness of which are modulated with a sine function, with one cycle of the sine wave corresponding to one encoder cycle, and the amplitude of the sine wave function changed to imbed an absolute reference home position in the optical track.
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公开(公告)号：DE602004014703D1
公开(公告)日：2008-08-14
申请号：DE602004014703
申请日：2004-11-23
Applicant: XEROX CORP
Inventor： BURKE EDWARD F , REEVES BARRY D , KNIERIM DAVID L , JENSEN JAMES B , JONES BRENT R , MARTENSON DAVID D , HILLS LEE D
Abstract: Disclosed are methods for compensating for failed ink jets in an ink jet apparatus. The method in embodiments determines if one or more ink jets are nonfunctioning or have failed and substitutes for the one or more nonfunctioning ink jets by using one or more operational ink jets. The operational ink jets used are neighboring operational ink jets that fill in for the one or more failed ink jets. The one or more failed ink jets are disabled wherein a primary image pass is performed followed by one or more additional imaging passes to fill in for the one or more disabled ink jets by enabling the one or more neighboring operational ink jets. The additional imaging passes may be a right fill imaging pass, a left fill imaging pass or a combination of both.
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公开(公告)号：BRPI0405107A
公开(公告)日：2005-07-19
申请号：BRPI0405107
申请日：2004-11-24
Applicant: XEROX CORP
Inventor： BURKE EDWARD F , REEVES BARRY D , KNIERIM DAVID L , JENSEN JAMES B , JONES BRENT R , MARTENSON DAVID D , HILLS LEE D
Abstract: Disclosed are methods for compensating for failed ink jets in an ink jet apparatus. The method in embodiments determines if one or more ink jets are nonfunctioning or have failed and substitutes for the one or more nonfunctioning ink jets by using one or more operational ink jets. The operational ink jets used are neighboring operational ink jets that fill in for the one or more failed ink jets. The one or more failed ink jets are disabled wherein a primary image pass is performed followed by one or more additional imaging passes to fill in for the one or more disabled ink jets by enabling the one or more neighboring operational ink jets. The additional imaging passes may be a right fill imaging pass, a left fill imaging pass or a combination of both.
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