Method for detecting external acceleration to a hard disk...

Details Method for detecting external acceleration to a hard disk... Method for detecting external acceleration to a hard disk...

2006-11-28

2006-11-28

Barlow, John (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system

Accelerometer

C318S560000, C360S075000

Reexamination Certificate

active

07143002

ABSTRACT:
A method for detecting an external acceleration applied to a hard disk drive is described. The method includes obtaining a running current value for a spindle motor operating a hard disk drive. The running current is provided from a controller coupled with the hard disk drive. The method further includes compensating the running current value for positional orientation of a data transducer and for torque disturbance. The method also includes filtering the running current value for removal of motor noise and direct current offset which, subsequent thereto, provides an estimated external acceleration amplitude. The method also includes invoking a defensive action for preventing damage to the data transducer and the data storage disk and loss of data disposed on the data storage disk. The defensive action is triggered when the estimated external acceleration amplitude exceeds a threshold value.

REFERENCES:
patent: 4947093 (1990-08-01), Dunstan et al.
patent: 5227929 (1993-07-01), Comerford

Affiliated with

Also associated with

Rating

Method for detecting external acceleration to a hard disk... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for detecting external acceleration to a hard disk..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for detecting external acceleration to a hard disk... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3643779