A degaussing method with reversible magnetic field

A degaussing method and degaussing technology, applied to the demagnetization device of the magnetic head, etc., can solve the problems of information leakage, field strength cannot overcome the coercive force of the magnetic medium, and incomplete degaussing, so as to achieve enhanced reliability, efficient storage and release of energy, Coercivity weakening effect

Active Publication Date: 2022-05-17
精密电产(北京)科技有限公司
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Problems solved by technology

[0003] The invention provides a degaussing method with a reversible magnetic field, which is used to solve the problem of incomplete degaussing due to the fact that the generated field strength cannot overcome the coercive force of the magnetic medium due to the improvement of the manufacturing process of the magnetic medium and the uncertainty of the use environment. , it is easy to cause information leakage

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  • A degaussing method with reversible magnetic field
  • A degaussing method with reversible magnetic field
  • A degaussing method with reversible magnetic field

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Embodiment Construction

[0053] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0054] as attached figure 1 Shown, the present invention is a kind of magnetic field reversible degaussing method, comprising:

[0055]Step 1: Set up a field strength conversion control unit between the degaussing coil and the energy storage device in advance, and connect a field strength induction sensor and an information detection sensor to the degaussing coil;

[0056] Step 2: sending a degaussing signal to the magnetic medium through the degaussing coil to perform the first degaussing, and generating a field strength induction signal in the field strength induction sensor;

[0057] Step 3: According to the field strength induction signal, the field strength co...

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Abstract

The invention provides a degaussing method with reversible magnetic field. Step 1: Set up a field strength conversion control unit between the degaussing coil and the energy storage device in advance, and connect a field strength induction sensor and an information detection sensor to the degaussing coil; Step 2: Send a degaussing signal to the magnetic medium through the degaussing coil for the first second degaussing, and generate a field strength sensing signal in the field strength sensing sensor; step 3: according to the field strength sensing signal, perform field strength conversion through the field strength conversion control unit, and after the field strength conversion, pass The degaussing coil sends a degaussing signal to the magnetic medium again to degauss again: Step 4: Repeat the step 3, and judge whether there is information in the magnetic medium through the information detection sensor, and in the magnetic medium When there is no information, the degaussing coil is controlled to stop sending the degaussing signal.

Description

technical field [0001] The invention relates to the technical fields of information security and degaussing treatment, in particular to a degaussing method with a reversible magnetic field. Background technique [0002] At present, the existing degaussing methods are to destroy the magnetic medium by one discharge and the direction of the field strength is fixed. However, with the improvement of the manufacturing process of magnetic The coercive force of the medium and the phenomenon of incomplete degaussing can easily cause information leakage. Therefore, how to adjust the degaussing method through the inversion of the direction of the field strength and the degaussing times is the research direction of the present invention. Contents of the invention [0003] The invention provides a degaussing method with a reversible magnetic field, which is used to solve the problem of incomplete degaussing due to the fact that the generated field strength cannot overcome the coercive...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B5/465
CPCG11B5/465
Inventor 高松张园
Owner 精密电产(北京)科技有限公司
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