Magnetic Media Demagnetization With Closed-Loop Field Control
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Solution Overview
Problem
Current demagnetization methods for magnetic media lack efficiency and precision due to the absence of a unified standard for demagnetization magnetic field intensity and lack of detailed mechanism analysis, leading to varying demagnetization effects across different magnetic mediums.
Innovation Solution
A rapid demagnetization method that involves acquiring characteristic information of magnetic media through a multi-source sensing mode, optimizing demagnetization parameters using a demagnetization parameter optimization module, and employing a closed-loop control mechanism to stabilize the demagnetization process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a strong demagnetization magnetic field is applied to magnetic media, then the demagnetization effect is improved, but the energy consumption increases and the risk of damaging the media increases
Solution Approach 1:
The patent applies dynamic control of the demagnetization magnetic field by adjusting its intensity and duration based on the specific characteristics of the magnetic media. The field strength is optimized to be sufficient for demagnetization while avoiding excessive energy consumption and potential damage to the media.
Solution Approach 2:
The patent changes key parameters of the demagnetization process, including magnetic field intensity, pulse duration, and frequency, to achieve effective demagnetization with minimized energy consumption. These parameters are adjusted according to the coercivity and other properties of the magnetic media.
2Reliability
If the demagnetization magnetic field intensity is increased to ensure complete data removal, then the security requirement is met, but the risk of media damage and cost increase
Solution Approach 1:
The patent uses dynamic adjustment of magnetic field parameters to achieve the minimum necessary field intensity for complete data removal without exceeding the threshold that would cause media damage. This ensures data security while protecting the physical integrity of the media.
Solution Approach 2:
The patent replaces the traditional mechanical approach of applying a fixed strong magnetic field with a controlled electromagnetic system that can precisely regulate field intensity, thereby eliminating the need for excessive force that would risk media damage.
3Reliability
If different demagnetization methods are used for different magnetic media types, then the demagnetization effectiveness is improved, but the device complexity and operation difficulty increase
Solution Approach 1:
The patent designs a universal demagnetization system capable of handling multiple types of magnetic media through automatic parameter adjustment. The system can adapt to different media characteristics without requiring separate dedicated devices for each media type, thereby reducing overall system complexity.
Solution Approach 2:
The patent implements automatic detection and adjustment mechanisms that allow the demagnetization system to self-adapt to different magnetic media types. The system automatically identifies media properties and adjusts demagnetization parameters accordingly, eliminating the need for manual configuration and reducing operational complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method ensures efficient and effective demagnetization by optimizing demagnetization parameters and using closed-loop control, addressing the inefficiencies and inconsistencies in existing methods and improving the demagnetization process for different magnetic media.
Implementation Method 1
a demagnetization coil and a control circuit electrically connected to the demagnetization coil, wherein the control circuit is configured to control the demagnetization coil to generate a demagnetizing magnetic field
Data Source
AI summary
A rapid demagnetization method based on characteristics of magnetic media. In the method, basic information is obtained by a recognition module of magnetic media by means of multi-source sensing collaboration. The magnetic medium is identified by using a data processing technology and a magnetic medium identification algorithm, and then the characteristic information is extracted. Optimized set values of demagnetization parameters are obtained by a demagnetization parameter optimizing and setting module based on a demagnetization optimizing model. Demagnetization parameter set values are tracked by a closed-loop control module of a demagnetization magnetic field in combination with domain expert knowledge by using a closed-loop control mechanism integrated with a magnetic field control algorithm, a charging-discharging device, a magnetic field generating device, a magnetic field sensor and an environmental sensor, completing the rapid demagnetization of the magnetic medium.