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1.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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公开(公告)号：US07002762B2
公开(公告)日：2006-02-21
申请号：US10776214
申请日：2004-02-12
申请人： Isaak D. Mayergoyz , Chun Tse , Charles S. Krafft
发明人： Isaak D. Mayergoyz , Chun Tse , Charles S. Krafft
IPC分类号： G11B5/09
CPC分类号： G11B20/10055 , G11B5/012 , G11B5/02 , G11B5/09 , G11B20/10009 , G11B20/24 , G11B2005/001 , G11B2005/0016
摘要： In recovering data originally written on a carrier of magnetic media after a catastrophic failure, data may be read without prior knowledge of the write channel by which the data was originally written and in the presence of intersymbol interference of the readback signal. This is accomplished by forming an image of the spatial response function of the magnetoresistive transducer used to recover the data and by forming an image of the raw data read from the carrier of magnetic media by the magnetoresistive transducer for which the response function has been characterized. An image of the distribution of virtual magnetic charge on the carrier of magnetic media is obtained through deconvolution of the image of the response function of the magnetoresistive transducer and the raw readback signal. The readback signal corresponding to the data originally written on the carrier of magnetic media is then recovered by spatial differentiation of the image of virtual magnetic charge. Further improvement in image quality of the resulting image is accomplished through a noise reduction technique such as by the application of an arctangent function to the data prior to differentiation.
摘要翻译： 在灾难性故障之后恢复原始写在磁性介质的载体上的数据时，可以在没有原始写入数据的写入通道以及存在回读信号的码间干扰的情况下读取数据。 这是通过形成用于恢复数据的磁阻换能器的空间响应函数的图像，并且通过形成具有响应函数的磁阻换能器从磁介质的载体读取的原始数据的图像来实现的。 通过磁阻换能器的响应函数的图像和原始回读信号的去卷积获得磁介质载体上的虚拟磁荷分布的图像。 然后通过虚拟磁荷的图像的空间微分来恢复对应于原始写在磁性介质的载体上的数据的回读信号。 所得图像的图像质量的进一步改善通过诸如通过在分化之前对数据应用反正切函数的降噪技术来实现。
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3.发明授权公开(公告)号：US07239332B1
公开(公告)日：2007-07-03
申请号：US11017538
申请日：2004-12-17
摘要： The present invention is a device for and method of viewing a magnetic pattern recorded on magnetic media. The device includes a base. The base has an opening and includes registration marks for aligning the magnetic media as desired. The base is attachable to a viewer. A guide is connected to the base so that it slides within the opening in the base. The guide also has an opening. An inflatable bladder is attached to, and under, the guide. The inflatable bladder fills the opening in the guide. A holder is attached to the base so that it can slide along the base and be closed onto the guide. The holder also includes an opening. A magnetic garnet film is set within the opening in the holder. A magnetic media is placed on the guide. The holder is closed onto the magnetic media and the guide. The inflatable bladder is inflated so that the magnetic media is brought into physical contact with the magnetic garnet film. The pattern on the magnetic media is transferred onto the magnetic garnet film. The viewer is used to view the magnetic pattern transferred to the magnetic garnet film.
摘要翻译： 本发明是用于观看记录在磁性介质上的磁性图案的装置和方法。 该装置包括一个基座。 基座具有开口，并且包括用于根据需要对准磁性介质的对准标记。 基座可附接到观察者。 引导件连接到基座，使其在基座的开口内滑动。 指南也有一个开口。 可充气的膀胱附着在引导件上和下面。 可膨胀的气囊填充导轨中的开口。 保持器附接到基座，使得其可以沿着基部滑动并且被封闭到引导件上。 支架还包括一个开口。 磁性石榴石薄膜设置在支架的开口内。 磁性介质放置在导轨上。 保持器封闭在磁性介质和引导件上。 充气气囊充气，使磁性介质与磁性石榴石膜物理接触。 磁性介质上的图案转移到磁性石榴石膜上。 观察者用于观察转移到磁性石榴石膜的磁性图案。
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