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公开(公告)号：US08619381B2
公开(公告)日：2013-12-31
申请号：US13115307
申请日：2011-05-25
IPC分类号： G11B5/02
CPC分类号： G11B5/59672
摘要： Systems and methods for improving accuracy of head positioning using existing servo patterns are provided. In one embodiment, a method for improving read head positioning is provided that comprises: writing a series of tracks over a range of read offsets to be calibrated; measuring a set of raw track profiles from the series of tracks; sampling the set of raw track profiles at a series of signal amplitude levels; constructing a reference track profile from the set of sampled track profiles; calculating a set of read offset deltas from each sampled track profile; merging the sets of read offset deltas into a set of average read offset deltas; and converting the set of average read offset deltas into a read offset correction table. A similar method for improving disk write head positioning is also provided which utilizes such a read offset correction table to eventually create write offset correction table.
摘要翻译： 提供了使用现有伺服模式提高磁头定位精度的系统和方法。 在一个实施例中，提供了一种用于改善读取头定位的方法，其包括：在待校准的读取偏移范围上写入一系列轨道; 从一系列轨道测量一组原始轨道轮廓; 在一系列信号幅度水平上对原始轨迹轮廓进行采样; 从所述采样的轨道轮廓集合中构造参考轨道轮廓; 从每个采样的轨道轮廓计算一组读取偏移量增量; 将读取偏移量三角形组合成一组平均读取偏移量三角形; 并将平均读取偏移量三角形的集合转换为读取偏移校正表。 还提供了一种用于改善磁盘写入头定位的类似方法，其利用这种读取偏移校正表来最终创建写偏移校正表。
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公开(公告)号：US20120300327A1
公开(公告)日：2012-11-29
申请号：US13115307
申请日：2011-05-25
IPC分类号： G11B27/36
CPC分类号： G11B5/59672
摘要： Systems and methods for improving accuracy of head positioning using existing servo patterns are provided. In one embodiment, a method for improving read head positioning is provided that comprises: writing a series of tracks over a range of read offsets to be calibrated; measuring a set of raw track profiles from the series of tracks; sampling the set of raw track profiles at a series of signal amplitude levels; constructing a reference track profile from the set of sampled track profiles; calculating a set of read offset deltas from each sampled track profile; merging the sets of read offset deltas into a set of average read offset deltas; and converting the set of average read offset deltas into a read offset correction table. A similar method for improving disk write head positioning is also provided which utilizes such a read offset correction table to eventually create write offset correction table.
摘要翻译： 提供了使用现有伺服模式提高磁头定位精度的系统和方法。 在一个实施例中，提供了一种用于改善读取头定位的方法，其包括：在待校准的读取偏移范围上写入一系列轨道; 从一系列轨道测量一组原始轨道轮廓; 在一系列信号幅度水平上对原始轨迹轮廓进行采样; 从所述采样的轨道轮廓集合中构造参考轨道轮廓; 从每个采样的轨道轮廓计算一组读取偏移量增量; 将读取偏移量三角形组合成一组平均读取偏移量三角形; 并将平均读取偏移量三角形的集合转换为读取偏移校正表。 还提供了一种用于改善磁盘写入头定位的类似方法，其利用这种读取偏移校正表来最终创建写偏移校正表。
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3.发明授权公开(公告)号：US07005849B2
公开(公告)日：2006-02-28
申请号：US10697300
申请日：2003-10-31
CPC分类号： G11B5/4555 , G11B5/00 , G11B5/012 , G11B5/455 , G11B5/59627 , G11B20/10009 , G11B20/1816 , G11B27/34 , G11B27/36 , G11B2005/001 , G11B2220/20
摘要： A system (10) and method for high-speed massive magnetic imaging on a spin-stand (12) is provided. The system (10) includes a spin-stand system (12) for driving a rotational spindle (20) to which a magnetic hard disk (30) is mounted. A magnetic read head (40) reads data from disk (30) and is in electrical communication with a universal head preamplification board (50). The universal head preamplification board (50) outputs readable voltage signals which are transmitted to an oscilloscope (60) for displaying a read-back voltage display (70). The signals are processed by a processing means (90) to generate scanned image data (100) on a display means. The display signals (70) are utilized to calibrate the magnetically read data to account for the eccentricity of the hard disks with respect to the center of rotation of the spin-stand spindle. Whole tracks of hard disk data can be imaged through the process of “track-centering” and “track-following”. An alignment algorithm is used to align the magnetically read data to compensate for the instability of the triggering signal.
摘要翻译： 提供了一种用于在旋转架（12）上进行高速大规模磁性成像的系统（10）和方法。 系统（10）包括用于驱动安装有磁性硬盘（30）的旋转主轴（20）的旋转架系统（12）。 磁读头（40）从盘（30）读取数据，并与万用头前置放大板（50）电连通。 万用头前置放大板（50）输出可读电压信号，该电压信号被传送到示波器（60）以显示回读电压显示（70）。 这些信号由处理装置（90）处理，以在显示装置上生成扫描图像数据（100）。 显示信号（70）用于校准磁读数据以解决硬盘相对于旋转架心轴的旋转中心的偏心度。 整个轨道的硬盘数据可以通过“跟踪中心”和“跟踪跟踪”的过程进行成像。 使用对准算法对准磁读取数据以补偿触发信号的不稳定性。
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