Rapid demagnetization method based on magnetic medium characteristics

A technology of magnetic medium and degaussing method, applied in the size/direction of the magnetic field, erasing method, magnetic objects, etc., can solve the problems of low efficiency, high energy consumption, and difficult to evaluate the degaussing effect.

Active Publication Date: 2020-02-14
BEIJING UNIV OF TECH
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Problems solved by technology

[0009] In view of the current method of degaussing magnetic media with different characteristics by relying on expert experience or using a fixed model to set the same degaussing voltage, there are problems such as low efficiency, high energy consumption, and difficult evaluation of degaussing effect

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  • Rapid demagnetization method based on magnetic medium characteristics
  • Rapid demagnetization method based on magnetic medium characteristics
  • Rapid demagnetization method based on magnetic medium characteristics

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Embodiment Construction

[0014] The invention provides a fast degaussing method based on the characteristics of magnetic media, which is realized by using a magnetic media identification module, a degaussing parameter optimization setting module, and a degaussing magnetic field closed-loop control module, such as figure 1 shown.

[0015] (1) Magnetic medium identification module

[0016] The input of this module is the magnetic medium X to be degaussed, and the output is the characteristic of the magnetic medium to be degaussed {ρ record , η material ,ζ force ,…}, its purpose is to identify the magnetic medium to be degaussed based on a variety of sensors and extract its characteristic information, and its corresponding mapping relationship is:

[0017] {ρ record , η material ,ζ force ,...}=f iden (X) (1)

[0018] Among them, {ρ record , η material ,ζ force ,…} is characteristic information composed of the magnetic recording method, material properties, coercive force, etc. of the magnetic ...

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Abstract

The invention provides a quick demagnetization method based on magnetic medium characteristics. Recognition module by magnetic medium, basic information such as brands, types, capacities and production time of to-be-demagnetized magnetic media is acquired by adopting multi-source sensing cooperation modes such as bar code scanning and image collection, magnetic medium recognition is realized by means of a data processing technology and a magnetic medium recognition algorithm, and then characteristic information such as a magnetic recording mode, material characteristics and coercive force of the to-be-demagnetized magnetic media is extracted; through a demagnetization parameter optimization setting module, obtaining optimization setting values of demagnetization parameters such as the magnetic field intensity and the demagnetization angle of the to-be-demagnetized magnetic medium based on the demagnetization optimization setting model; a degaussing parameter set value is tracked through a degaussing magnetic field closed-loop control module in combination with domain expert knowledge by adopting a closed-loop control mechanism integrating a magnetic field control algorithm, a charging and discharging device, a magnetic field generation device, a magnetic field and an environmental characteristic measurement sensor, and quick degaussing of a magnetic medium to be degaussed is completed.

Description

technical field [0001] The invention belongs to the technical field of storage media, in particular to a fast degaussing method based on the characteristics of magnetic media. Background technique [0002] Storage media include hard disks, CDs, USB flash drives, solid-state drives, memory cards, memory cards, and special chips, which can be further divided into magnetic and non-magnetic media. The advantages of multiple recording and repeated use of magnetic recording media make it one of the main information storage media in various professional application fields and consumer electronics fields. [1] . During the use of magnetic recording media, it is often necessary to erase the recorded information in order to realize its multiple use. Usually, software operations such as formatting or direct overwriting have hidden dangers of privacy information leakage. Therefore, it is necessary to use degaussing to completely remove the original data. To meet the requirements of com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/024G11B5/012
CPCG11B5/024G11B5/012G01R33/1215G01R33/02H01F13/006
Inventor 汤健徐喆李鹏昇刘晓鸽
Owner BEIJING UNIV OF TECH
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