Disk drive
AssigneeKabushiki Kaisha Toshiba
InventorsKiyoshi Ishiyama, Katsuhiko Kaida
Life of this patent
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Abstract
A 2-axis acceleration sensor has two detection axes (X- and Y-axes), and detects a dynamic acceleration (shock) and a static acceleration (a change in gravity or tilt). A sensor output extraction unit acquires detection signals corresponding to the static acceleration for respective detection axes by extracting frequency components lower than a frequency component associated with the dynamic acceleration. A CPU determines whether the disk drive is dropping, whether it has a tilt, and so forth, based on the acquired detection signals for respective detection axes, and causes a magnetic head to be retracted to the position of a ramp if such state is detected.
Claims14
A disk drive comprising:
- an acceleration sensor which has at least two detection axes and detects dynamic and static accelerations;
- an extraction unit which acquires detection signals corresponding to the static acceleration for respective detection axes by extracting frequency components lower than a frequency component associated with the dynamic acceleration;
- and
- a processing unit which determines whether or not a head is to be retracted, based on the acquired detection signals for respective detection axes.
A disk drive comprising:
- a printed circuit board;
- an acceleration sensor which is mounted on said printed circuit board, has at least two detection axes, and detects dynamic and static accelerations;
- an extraction unit which is mounted on said printed circuit board, and acquires detection signals corresponding to the static acceleration for respective detection axes by extracting frequency components lower than a frequency component associated with the dynamic acceleration;
- and
- a processing unit which determines whether or not a head is to be retracted, based on the acquired detection signals for respective detection axes.
Dependencies are inferred from the claim text.