Friction demagnetization test apparatus for hard disk

Abstract

The invention relates to the field of disk testing, and in particular discloses a friction demagnetization test device for a magnetic disk of a hard disk. The device comprise a computer connected with the hard disk (1), a test stand (2) for fixing the hard disk (1), a one-dimensional automatic reciprocating translation stand (3) arranged on the test stand (2), a three-dimensional manual translation stand (4) arranged on the one-dimensional automatic reciprocating translation stand (3), a friction ball (5) arranged on the magnetic disk (102) of the hard disk (1), and a clamp (6) for clamping the friction ball (5), wherein a force sensor (7) is fixedly connected between the three-dimensional manual translation stand (4) and the clamp (6); and the moving direction of the one-dimensional automatic reciprocating translation stand (3) runs through the center of the magnetic disk (102), the force sensor (7) measures positive pressure and friction force between the magnetic disk (102) and thefriction ball (5), and the computer measures the demagnetization condition of the magnetic disk (102) through a magnetic head (101) of the hard disk (1).

Description

technical field [0001] The patent of the present invention relates to the field of disk testing, and more specifically, relates to a frictional demagnetization testing device for hard disk disks. Background technique [0002] Hard drives are widely used in computers, media players, in-vehicle electronic systems, GPS terminals, consumer electronics and other fields. In particular, with the wide application of hard disks, it will become particularly important to improve the security of data stored on disks of hard disks. [0003] The storage capacity of the disk is related to the surface recording density of the disk. Increasing the surface recording density of the disk can obtain a hard disk with a larger storage capacity. This requires measures such as reducing the flying height of the hard disk head and reducing the thickness of the protective film on the surface of the disk. The flying height of the magnetic head is reduced, which greatly increases the collision probabili...

AI Technical Summary

Problems solved by technology

The flying height of the magnetic head is reduced, which greatly increases the collision probability between the magnetic head and the magnetic disk; the reduction of the thickness of the surface protective film will make the magnetic layer of the magnetic disk more vulnerable to damage during the contact collision process; The stress and temperature rise of the disk will cause the magnetic layer of the disk to demagnetize, resulting in the loss of stored data

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