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公开(公告)号：US08405926B2
公开(公告)日：2013-03-26
申请号：US12842938
申请日：2010-07-23
申请人： Nhan Xuan Bui , Reed Alan Hancock , Randy Clark Inch , Shuhei Nadehara , Eiji Ogura , Kazuhiro Tsuruta
发明人： Nhan Xuan Bui , Reed Alan Hancock , Randy Clark Inch , Shuhei Nadehara , Eiji Ogura , Kazuhiro Tsuruta
摘要： In accordance with the present invention, a method of operating a magnetic tape drive, a magnetic tape drive and a servo control system are provided for obtaining and maintaining velocity control in a magnetic tape drive. In one embodiment, a method is provided for operating a magnetic tape drive. The tape drive includes a plurality of DC motors, and each DC motor has a plurality of Hall sensors. The DC motors are under the control of a servo system which is configured to read location information from the magnetic tape, and compute a primary tape velocity from the location information, and sense a secondary and tertiary velocity signal and compute a tape velocity based on one of the sensed secondary velocity signal and tertiary velocity. The method includes detecting if the primary velocity location information is available. In response to detecting that the primary velocity location information is available the primary velocity is employed to control the servo system. In response to detecting the primary velocity location information is unavailable then one of a secondary or a tertiary velocity signal is employed. The secondary velocity signal is employed when an absolute value of a term related to tape velocity is less than a predetermined value. The tertiary velocity signal is employed when the absolute value of the term related to tape velocity is greater than the predetermined value.
摘要翻译： 根据本发明，提供了一种操作磁带驱动器，磁带驱动器和伺服控制系统的方法，用于获得和维持磁带驱动器中的速度控制。 在一个实施例中，提供了一种用于操作磁带驱动器的方法。 磁带驱动器包括多个DC电动机，并且每个DC电动机具有多个霍尔传感器。 直流电动机处于伺服系统的控制之下，伺服系统被配置为从磁带读取位置信息，并从位置信息计算主带速度，并感测二次和三次速度信号，并基于一个速度信号计算磁带速度 的感测二次速度信号和三次速度。 该方法包括检测主速度位置信息是否可用。 响应于检测到主速度位置信息可用，主速度被用于控制伺服系统。 响应于检测到主速度位置信息不可用，则采用次速或三速信号中的一个。 当与磁带速度相关的项的绝对值小于预定值时，采用二次速度信号。 当与磁带速度相关的项的绝对值大于预定值时，采用三次速度信号。
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公开(公告)号：US20120019953A1
公开(公告)日：2012-01-26
申请号：US12842938
申请日：2010-07-23
申请人： Nhan Xuan Bui , Reed Alan Hancock , Randy Clark Inch , Shuhei Nadehara , Eiji Ogura , Kazuhiro Tsuruta
发明人： Nhan Xuan Bui , Reed Alan Hancock , Randy Clark Inch , Shuhei Nadehara , Eiji Ogura , Kazuhiro Tsuruta
IPC分类号： G11B19/02
摘要： In accordance with the present invention, a method of operating a magnetic tape drive, a magnetic tape drive and a servo control system are provided for obtaining and maintaining velocity control in a magnetic tape drive. In one embodiment, a method is provided for operating a magnetic tape drive. The tape drive includes a plurality of DC motors, and each DC motor has a plurality of Hall sensors. The DC motors are under the control of a servo system which is configured to read location information from the magnetic tape, and compute a primary tape velocity from the location information, and sense a secondary and tertiary velocity signal and compute a tape velocity based on one of the sensed secondary velocity signal and tertiary velocity. The method includes detecting if the primary velocity location information is available. In response to detecting that the primary velocity location information is available the primary velocity is employed to control the servo system. In response to detecting the primary velocity location information is unavailable then one of a secondary or a tertiary velocity signal is employed. The secondary velocity signal is employed when an absolute value of a term related to tape velocity is less than a predetermined value. The tertiary velocity signal is employed when the absolute value of the term related to tape velocity is greater than the predetermined value.
摘要翻译： 根据本发明，提供了一种操作磁带驱动器，磁带驱动器和伺服控制系统的方法，用于获得和维持磁带驱动器中的速度控制。 在一个实施例中，提供了一种用于操作磁带驱动器的方法。 磁带驱动器包括多个DC电动机，并且每个DC电动机具有多个霍尔传感器。 直流电动机处于伺服系统的控制之下，伺服系统被配置为从磁带读取位置信息，并从位置信息计算主带速度，并感测二次和三次速度信号，并基于一个速度信号计算磁带速度 的感测二次速度信号和三次速度。 该方法包括检测主速度位置信息是否可用。 响应于检测到主速度位置信息可用，主速度被用于控制伺服系统。 响应于检测到主速度位置信息不可用，则采用次速或三速信号中的一个。 当与磁带速度相关的项的绝对值小于预定值时，采用二次速度信号。 当与磁带速度相关的项的绝对值大于预定值时，采用三次速度信号。
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3.发明授权Method and apparatus to identify a data band encoded between two servo bands in a sequential information storage medium 失效用于识别在顺序信息存储介质中的两个伺服频带之间编码的数据频带的方法和装置公开(公告)号：US08054569B2
公开(公告)日：2011-11-08
申请号：US12505442
申请日：2009-07-17
CPC分类号： G11B5/584
摘要： A method and apparatus is presented to determine a lateral position of a read/write head relative to a sequential information storage medium having a servo signal encoded therein and moving adjacent to the read/write head, where the servo signal comprises a plurality of pulses. The method includes detecting the servo signal using the read/write head and calculating a timing interval between each of the pulses using a clock rate of a clock signal. The clock rate is then adjusted based upon the velocity of the sequential information storage medium.
摘要翻译： 提供了一种方法和装置，用于确定读/写头相对于其中编码有伺服信号的顺序信息存储介质的横向位置，并且与读/写头相邻移动，其中伺服信号包括多个脉冲。 该方法包括使用读/写头检测伺服信号，并使用时钟信号的时钟速率计算每个脉冲之间的定时间隔。 然后基于顺序信息存储介质的速度来调整时钟速率。
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公开(公告)号：US20060119962A1
公开(公告)日：2006-06-08
申请号：US11003224
申请日：2004-12-03
CPC分类号： G11B20/182 , G11B5/00813 , G11B5/4555 , G11B15/087 , G11B27/36 , G11B2005/001 , G11B2020/10592 , G11B2220/90
摘要： Data reliability testing for a magnetic tape drive is conducted separately for the channels of a magnetic tape drive which write and read tracks of a multiple track magnetic tape. Memory stores testing data representing data separately written to tracks of a multiple track magnetic tape; each of a plurality of read channels reads data sensed by a tape head from a separate track of a magnetic tape; and error processing logic detects differences between data from each of a plurality of the read channels, and stored testing data of the memory representing data written to the same separate tracks.
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5.发明申请公开(公告)号：US20090289138A1
公开(公告)日：2009-11-26
申请号：US12332175
申请日：2008-12-10
申请人： Shuhei Nadehara
发明人： Shuhei Nadehara
CPC分类号： G11B15/026 , G11B15/32 , G11B15/43
摘要： In a tape drive during a transition to a stand-by mode, a tape is wound under control of a processor (e.g., CPU) until duration of a time interval between moments when rotational positions of the reels change decreases to a pre-determined threshold. Thereafter, in the stand-by mode, the processor switches control over the tape drive to a low-power logic circuit (e.g., PLC) and enters a power-save mode.
摘要翻译： 在转换到待机模式的磁带驱动器中，磁带在处理器（例如，CPU）的控制下被卷绕，直到卷轴的旋转位置变化的时刻之间的时间间隔持续到预定的阈值 。 此后，在待机模式下，处理器将磁带驱动器的控制切换到低功率逻辑电路（例如PLC）并进入省电模式。
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6.发明授权Integrated multiple channel data reliability testing for a magnetic tape drive 失效对磁带驱动器进行集成多通道数据可靠性测试公开(公告)号：US07573664B2
公开(公告)日：2009-08-11
申请号：US11003224
申请日：2004-12-03
IPC分类号： G11B27/36
CPC分类号： G11B20/182 , G11B5/00813 , G11B5/4555 , G11B15/087 , G11B27/36 , G11B2005/001 , G11B2020/10592 , G11B2220/90
摘要： Data reliability testing for a magnetic tape drive is conducted separately for the channels of a magnetic tape drive which write and read tracks of a multiple track magnetic tape. Memory stores testing data representing data separately written to tracks of a multiple track magnetic tape; each of a plurality of read channels reads data sensed by a tape head from a separate track of a magnetic tape; and error processing logic detects differences between data from each of a plurality of the read channels, and stored testing data of the memory representing data written to the same separate tracks.
摘要翻译： 磁带驱动器的数据可靠性测试分别针对写入和读取多磁道磁带的磁道的磁带驱动器的通道进行。 存储器存储表示分别写入多轨磁带的轨道的数据的测试数据; 多个读取通道中的每个读取通道从磁带的单独磁道读取由磁带头感测的数据; 并且错误处理逻辑检测来自多个读取通道中的每一个的数据之间的差异，以及存储器表示写入相同单独轨道的数据的测试数据。
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7.发明授权公开(公告)号：US07484682B1
公开(公告)日：2009-02-03
申请号：US12125294
申请日：2008-05-22
申请人： Shuhei Nadehara
发明人： Shuhei Nadehara
IPC分类号： G11B15/18
CPC分类号： G11B15/026 , G11B15/32 , G11B15/43
摘要： In a tape drive during a transition to a stand-by mode, a tape is wound under control of a processor (e.g., CPU) until duration of a time interval between moments when rotational positions of the reels change decreases to a pre-determined threshold. Thereafter, in the stand-by mode, the processor switches control over the tape drive to a low-power logic circuit (e.g., PLC) and enters a power-save mode.
摘要翻译： 在转换到待机模式的磁带驱动器中，磁带在处理器（例如，CPU）的控制下被卷绕，直到卷轴的旋转位置变化的时刻之间的时间间隔持续到预定的阈值 。 此后，在待机模式下，处理器将磁带驱动器的控制切换到低功率逻辑电路（例如PLC）并进入省电模式。
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公开(公告)号：US07558018B1
公开(公告)日：2009-07-07
申请号：US12248036
申请日：2008-10-08
申请人： Shuhei Nadehara
发明人： Shuhei Nadehara
CPC分类号： G11B5/5504
摘要： Disclosed are systems and methods for positioning a head. An exemplary system includes a light source; a detector configured to receive signals from the light source; a transducer that reads signals from a magnetic tape; a plurality of structures coupled to the transducer and configured to pass in opposition to the detector; a stepping motor; and circuitry configured to determine whether or not a light signal is received by the detector. If the light signal is received, the circuitry commands the stepping motor to move the transducer incrementally in a first direction. If the light signal is interrupted by moving the transducer within a first distance, the circuitry commands the stepping motor to move the transducer in a direction opposite the first direction until the light signal has been continuously received across more than the first distance. If the light signal is not interrupted by moving the transducer within the first distance, continue to the circuitry commands the stepping motor to move the transducer incrementally in a first direction until the light signal is interrupted. If the first determining step determines that the light signal is not received, the circuitry commands the stepping motor to move the transducer incrementally in a direction opposite the first direction.
摘要翻译： 公开了用于定位头部的系统和方法。 示例性系统包括光源; 检测器，被配置为从所述光源接收信号; 从磁带读取信号的换能器; 耦合到所述换能器并且被配置成与所述检测器相对地通过的多个结构; 步进电机; 以及被配置为确定所述检测器是否接收到光信号的电路。 如果接收到光信号，则电路命令步进电机沿第一方向递增地移动换能器。 如果通过在第一距离内移动换能器来中断光信号，则电路命令步进电机沿与第一方向相反的方向移动换能器，直到光信号被连续接收超过第一距离。 如果光信号在第一距离内移动传感器不会中断，则继续电路命令步进电机沿第一方向递增地移动传感器，直到光信号中断。 如果第一确定步骤确定没有接收到光信号，则电路命令步进电机沿与第一方向相反的方向递增地移动换能器。
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公开(公告)号：US07463444B1
公开(公告)日：2008-12-09
申请号：US12058744
申请日：2008-03-30
申请人： Shuhei Nadehara
发明人： Shuhei Nadehara
CPC分类号： G11B5/5504
摘要： A system and method that directs a transducer to a home position while taking into account whether a light source, used to detect light interruption is inoperative. The method for the system including a light source, a detector configured to receive signals from the light source, a transducer that reads signals from a magnetic tape and a plurality of structures coupled to the transducer and configured to pass in opposition to the detector.
摘要翻译： 一种将换能器引导到原位的系统和方法，同时考虑用于检测光中断的光源是否不起作用。 该系统的方法包括光源，被配置为从光源接收信号的检测器，从磁带读取信号的换能器和耦合到换能器的多个结构，并被配置为与检测器相对地通过。
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