公开(公告)号：US07175122B2

公开(公告)日：2007-02-13

申请号：US10765789

申请日：2004-01-26

申请人： Nhan Xuan Bui ,  Junichi Fukuda ,  Randy Clark Inch ,  Eiji Ogura ,  Kazuhiro Tsuruta

发明人： Nhan Xuan Bui ,  Junichi Fukuda ,  Randy Clark Inch ,  Eiji Ogura ,  Kazuhiro Tsuruta

IPC分类号： G11B15/18

CPC分类号： G11B15/093

摘要： Disclosed are a system, a method, and an article of manufacture to provide for the detection and compensation of tape breakage in a tape drive. The invention operates by simultaneously monitoring the tape reel rotation direction and the ratio of rotation between the tape reels. If the rotation direction is not the same for both reels, then tape breakage is indicated and reel rotation ceases. Tape breakage is also detected if the tape reel angular rotation ratio between the supply and take up reels is not within a specified tape reel ratio range. The tape reel angular rotation ratio is detected by simultaneously measuring the angular rotation of each tape reel in a specified time period and then calculating the ratio. The present invention detects the tape reel angular rotation ratio and if tape reel angular rotation ratio is outside of the specified tape reel ratio range, tape breakage is indicated and reel rotation ceases.

摘要翻译： 公开了一种用于提供磁带驱动器中的磁带破损的检测和补偿的系统，方法和制品。 本发明通过同时监测磁带卷轴的旋转方向和磁带盘之间的旋转比来操作。 如果两个卷轴的旋转方向不一致，则表示带子断裂，并且卷轴旋转停止。 如果供纸卷取卷轴之间的磁带卷轴角度旋转比不在指定的磁带卷盘比范围内，则也会检测到磁带断线。 通过在规定的时间段内同时测量每个磁带卷轴的角度旋转，然后计算该比率来检测磁带卷轴角度旋转比。 本发明检测磁带卷轴的角度旋转比，如果磁带卷轴角度旋转比在指定的磁带卷盘比例范围之外，则表示磁带破损并且卷轴旋转停止。

公开(公告)号：US07364106B2

公开(公告)日：2008-04-29

申请号：US11674615

申请日：2007-02-13

申请人： Nhan Xuan Bui ,  Junichi Fukuda ,  Randy Clark Inch ,  Eiji Ogura ,  Kazuhiro Tsuruta

发明人： Nhan Xuan Bui ,  Junichi Fukuda ,  Randy Clark Inch ,  Eiji Ogura ,  Kazuhiro Tsuruta

IPC分类号： G11B15/18

CPC分类号： G11B15/093

摘要： Disclosed are a system, a method, and an article of manufacture to provide for the detection and compensation of tape breakage in a tape drive. The invention operates by simultaneously monitoring the tape reel rotation direction and the ratio of rotation between the tape reels. If the rotation direction is not the same for both reels, then tape breakage is indicated and reel rotation ceases. Tape breakage is also detected if the tape reel angular rotation ratio between the supply and take up reels is not within a specified tape reel ratio range. The tape reel angular rotation ratio is detected by simultaneously measuring the angular rotation of each tape reel in a specified time period and then calculating the ratio. The present invention detects the tape reel angular rotation ratio and if tape reel angular rotation ratio is outside of the specified tape reel ratio range, tape breakage is indicated and reel rotation ceases.

摘要翻译： 公开了一种用于提供磁带驱动器中的磁带破损的检测和补偿的系统，方法和制品。 本发明通过同时监测磁带卷轴的旋转方向和磁带盘之间的旋转比来操作。 如果两个卷轴的旋转方向不一致，则表示带子断裂，并且卷轴旋转停止。 如果供纸卷取卷轴之间的磁带卷轴角度旋转比不在指定的磁带卷盘比范围内，则也会检测到磁带断线。 通过在规定的时间段内同时测量每个磁带卷轴的角度旋转，然后计算该比率来检测磁带卷轴角度旋转比。 本发明检测磁带卷轴的角度旋转比，如果磁带卷轴角度旋转比在指定的磁带卷盘比例范围之外，则表示磁带破损并且卷轴旋转停止。

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

IPC分类号： G11B15/52 ,  G11B15/46

CPC分类号： G11B15/32 ,  G11B15/46 ,  G11B15/52

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。

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

CPC分类号： G11B15/32 ,  G11B15/46 ,  G11B15/52

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。

公开(公告)号：US07102846B2

公开(公告)日：2006-09-05

申请号：US11215132

申请日：2005-08-29

申请人： Nhan Xuan Bui ,  James Howard Eaton ,  Junichi Fukuda ,  Glen Alan Jaquette ,  Eiji Ogura ,  Mark Allan Taylor ,  Kazuhiro Tsuruta

发明人： Nhan Xuan Bui ,  James Howard Eaton ,  Junichi Fukuda ,  Glen Alan Jaquette ,  Eiji Ogura ,  Mark Allan Taylor ,  Kazuhiro Tsuruta

IPC分类号： G11B5/584 ,  G11B5/09

CPC分类号： G11B5/584 ,  G11B5/00813 ,  G11B5/78

摘要： In a tape having separate servo bands of patterns positioned laterally across the tape, the patterns of a separate servo band have at least one differentiating characteristic with respect to patterns of another of the separate servo bands. The differentiating characteristic allows identification of the separate servo bands. For example, the patterns of a separate servo band have differing azimuthal orientations of detectable transitions with respect to another servo band, such as being laterally inverted. In another, variations in the width of gaps of patterns are made with respect to another servo band. In another, variations are made in the number of the detectable transitions of patterns with respect to the patterns of another servo band.

公开(公告)号：US07002763B2

公开(公告)日：2006-02-21

申请号：US10638041

申请日：2003-08-08

申请人： Nhan Xuan Bui ,  James Howard Eaton ,  Junichi Fukuda ,  Glen Alan Jaquette ,  Eiji Ogura ,  Mark Allan Taylor ,  Kazuhiro Tsuruta

发明人： Nhan Xuan Bui ,  James Howard Eaton ,  Junichi Fukuda ,  Glen Alan Jaquette ,  Eiji Ogura ,  Mark Allan Taylor ,  Kazuhiro Tsuruta

IPC分类号： G11B5/09

CPC分类号： G11B5/584 ,  G11B5/00813 ,  G11B5/78

摘要： In a tape having separate servo bands of patterns positioned laterally across the tape, the patterns of a separate servo band have at least one differentiating characteristic with respect to patterns of another of the separate servo bands. The differentiating characteristic allows identification of the separate servo bands. For example, the patterns of a separate servo band have differing azimuthal orientations of detectable transitions with respect to another servo band, such as being laterally inverted. In another, variations in the width of gaps of patterns are made with respect to another servo band. In another, variations are made in the number of the detectable transitions of patterns with respect to the patterns of another servo band.

摘要翻译： 在具有横向跨越带的位置的分离的图案的带的带中，单独的伺服带的图案相对于另一个分离的伺服带的图案具有至少一个微分特性。 微分特性允许识别单独的伺服带。 例如，单独的伺服带的图案具有相对于另一个伺服带的可检测转变的方位取向不同，例如横向倒置。 另一方面，相对于另一个伺服带，进行图案间隙宽度的变化。 另一方面，在相对于另一个伺服带的图案的图案的可检测转变的数量中进行变化。

公开(公告)号：US07102847B2

公开(公告)日：2006-09-05

申请号：US11215456

申请日：2005-08-29

申请人： Nhan Xuan Bui ,  James Howard Eaton ,  Junichi Fukuda ,  Glen Alan Jaquette ,  Eiji Ogura ,  Mark Allan Taylor ,  Kazuhiro Tsuruta

发明人： Nhan Xuan Bui ,  James Howard Eaton ,  Junichi Fukuda ,  Glen Alan Jaquette ,  Eiji Ogura ,  Mark Allan Taylor ,  Kazuhiro Tsuruta

IPC分类号： G11B5/584 ,  G11B5/09

CPC分类号： G11B5/584 ,  G11B5/00813 ,  G11B5/78

摘要： In a tape having separate servo bands of patterns positioned laterally across the tape, the patterns of a separate servo band have at least one differentiating characteristic with respect to patterns of another of the separate servo bands. The differentiating characteristic allows identification of the separate servo bands. For example, the patterns of a separate servo band have differing azimuthal orientations of detectable transitions with respect to another servo band, such as being laterally inverted. In another, variations in the width of gaps of patterns are made with respect to another servo band. In another, variations are made in the number of the detectable transitions of patterns with respect to the patterns of another servo band.

公开(公告)号：US06937413B2

公开(公告)日：2005-08-30

申请号：US10638080

申请日：2003-08-08

申请人： Nhan Xuan Bui ,  James Howard Eaton ,  Junichi Fukuda ,  Glen Alan Jaquette ,  Eiji Ogura ,  Mark Allan Taylor ,  Kazuhiro Tsuruta

发明人： Nhan Xuan Bui ,  James Howard Eaton ,  Junichi Fukuda ,  Glen Alan Jaquette ,  Eiji Ogura ,  Mark Allan Taylor ,  Kazuhiro Tsuruta

IPC分类号： G11B5/008 ,  G11B5/584 ,  G11B5/78 ,  G11B5/09

CPC分类号： G11B5/584 ,  G11B5/00813 ,  G11B5/78

摘要： In magnetic tape having separate longitudinal servo bands of servo information with superimposed data information, the separate servo bands have selected different superimposed data information, to identify the separate servo bands for independent addressability. The servo information comprises non-parallel laterally extending transitions to indicate lateral positioning, and the selected different superimposed data information may comprise a lack thereof in portion(s) of the servo bands. Where the superimposed data information is longitudinal position information of the tape, the selected different superimposed data information may comprise different longitudinal position information of one or more servo band(s). The selected different superimposed data information may comprise a band identifier in the superimposed data information of one or more of the servo bands.

摘要翻译： 在具有具有叠加数据信息的伺服信息的单独的纵向伺服带的磁带中，分离的伺服带已经选择了不同的叠加数据信息，以识别用于独立寻址能力的单独的伺服带。 伺服信息包括非平行横向延伸的转换以指示横向定位，并且所选择的不同叠加数据信息可能包括在伺服带的一部分中的缺乏。 在叠加数据信息是磁带的纵向位置信息的情况下，所选择的不同叠加数据信息可以包括一个或多个伺服带的不同纵向位置信息。 所选择的不同的叠加数据信息可以包括一个或多个伺服带的叠加数据信息中的频带标识符。

公开(公告)号：US08054576B2

公开(公告)日：2011-11-08

申请号：US12707316

申请日：2010-02-17

申请人： Nhan Xuan Bui ,  Reed Alan Hancock ,  Randy Clark Inch ,  Kevin Bruce Judd ,  Kazuhiro Tsuruta

发明人： Nhan Xuan Bui ,  Reed Alan Hancock ,  Randy Clark Inch ,  Kevin Bruce Judd ,  Kazuhiro Tsuruta

IPC分类号： G11B5/584 ,  G11B20/20

CPC分类号： G11B5/584

摘要： A servo detection system for detecting servo tracks of a longitudinal tape. In a read/write head, two servo read heads are spaced laterally on a first head module, and a servo read head is on a second head module spaced longitudinally from the first module. A method comprises initially sensing a tape servo track with one servo read head of the first module and the servo read head of the second module to determine skew misalignment of the servo track. A zero reference value is stored representing the determined skew misalignment. The detection system switches from the one servo read head of each module, to the two servo read heads of the first module, and employs the stored value to position the read/write head in the zero skew position. The two servo read heads are then employed to read two servo tracks to identify the data band and to control skew.

摘要翻译： 一种用于检测纵向磁带的伺服磁道的伺服检测系统。 在读/写头中，两个伺服读头在第一头模块上横向隔开，并且伺服读头位于与第一模块纵向间隔开的第二头模块上。 一种方法包括：首先利用第一模块的一个伺服读取头和第二模块的伺服读取头来感测磁带伺服磁道，以确定伺服磁道的偏斜不对准。 存储表示所确定的倾斜未对准的零参考值。 检测系统从每个模块的一个伺服读取头切换到第一个模块的两个伺服读取头，并使用存储的值将读/写头置于零倾斜位置。 然后使用两个伺服读取头来读取两个伺服磁道以识别数据带并控制偏斜。

公开(公告)号：US08134797B2

公开(公告)日：2012-03-13

申请号：US12716956

申请日：2010-03-03

申请人： Nhan Xuan Bui ,  Randy Clark Inch ,  Eiji Ogura

发明人： Nhan Xuan Bui ,  Randy Clark Inch ,  Eiji Ogura

IPC分类号： G11B5/55 ,  G11B5/584

CPC分类号： G11B5/584

摘要： The method employs a servo system for positioning a head laterally to follow lateral motion of a longitudinal tape having longitudinal defined servo track(s), the servo system comprising a servo element configured to sense lateral position of the head with respect to an acquired servo track, a fine actuator configured to translate the head laterally with respect to the longitudinal tape, and a position error signal loop to operate the fine actuator to translate the head laterally to reduce position error. If the servo element is positioned away from the defined servo track(s), a continuous position error offset signal is applied to the fine actuator in a direction towards the defined servo track(s), whereby the fine actuator translates the head in accordance with the continuous position error offset signal; and, in response to the servo system acquiring the defined servo track(s), the continuous position error offset signal is discontinued.

摘要翻译： 该方法采用伺服系统来横向定位头部以跟随具有纵向限定的伺服轨道的纵向带的侧向运动，该伺服系统包括伺服元件，该伺服元件被配置为感测头部相对于所获取的伺服轨道的横向位置 ，精细致动器，被配置为相对于纵向带横向地平移头部;以及位置误差信号回路，用于操作精细致动器以横向平移头部以减少位置误差。 如果伺服元件远离定义的伺服轨道定位，则连续的位置误差偏移信号在朝向所定义的伺服轨道的方向上被施加到精细致动器，由此精细致动器根据 连续位置误差偏移信号; 并且响应于伺服系统获取所定义的伺服轨迹，连续位置误差偏移信号被停止。