Transducer head flying height monitoring methods and apparatus for disk
drive system
    1.
    发明授权
    Transducer head flying height monitoring methods and apparatus for disk drive system 失效
    传感器头部飞行高度监测方法和装置用于磁盘驱动系统

    公开(公告)号:US5168413A

    公开(公告)日:1992-12-01

    申请号:US621010

    申请日:1990-11-30

    摘要: A method and apparatus are provided for measuring flying height changes of a transducer head relative to a disk surface of a rotating disk in a disk file. A predetermined pattern is written on at least one predetermined region of the disk file. The predetermined region is normally not rewritten during operation of the disk file. At least one readback signal is sensed from at least one predetermined region of the disk surface. A plurality of sample values are identified corresponding to each readback signal. A change in the flying height is calculated utilizing the identified sample values. A frequency equalization number K can be utilized to calculate the magnitude and sign of the flying height change. Alternatively, real-time digital analysis of a predetermined pattern written on at least one predetermined region of the disk surface can be utilized to calculate the magnitude and sign of the flying height change.

    摘要翻译: 提供一种用于测量换能器头相对于盘文件中的旋转盘的盘表面的飞行高度变化的方法和装置。 预定图案被写在盘文件的至少一个预定区域上。 通常在磁盘文件的操作期间不改写预定区域。 从盘表面的至少一个预定区域感测至少一个回读信号。 对应于每个回读信号识别多个样本值。 使用识别的样本值计算飞行高度的变化。 可以使用频率均衡数K来计算飞行高度变化的大小和符号。 或者,可以使用写在盘表面的至少一个预定区域上的预定图案的实时数字分析来计算飞行高度变化的大小和符号。