Residual magnetic field demagnetization device and method

Abstract

The invention provides a residual magnetic field demagnetization device and a residual magnetic field demagnetization method. The residual magnetic field demagnetization method comprises the followingsteps: S1, measuring residual magnetism of a to-be-demagnetized part; S2, applying an alternating magnetic field of which the amplitude is continuously attenuated to zero from large to small to the to-be-demagnetized part in the axial direction of the to-be-demagnetized part through a pulse demagnetizing device so as to demagnetize the to-be-demagnetized part, and the pulse demagnetizing device comprises a capacitor and a demagnetizing coil; and S3, measuring the residual magnetism of the demagnetized part to be demagnetized. On the other hand, the invention provides a residual magnetic fielddemagnetizing device which comprises a pulse demagnetizing device and a magnetic shielding device, and the residual magnetic field demagnetizing device demagnetizes the residual magnetic field in thepart to be demagnetized according to the residual magnetic field demagnetizing method. According to the residual magnetic field demagnetization device and method provided by the invention, miniaturization and low pressure of the demagnetization device are realized, and the device can be fixedly mounted on a magnetic structural member for real-time demagnetization; and the demagnetization efficiency of the demagnetization method is high, and the demagnetization rate can reach 90% or above.

Description

technical field [0001] The invention relates to the technical field of magnetic environment optimization, in particular to a residual magnetic field demagnetization device and method. Background technique [0002] Because the workpiece after processing is not demagnetized or the demagnetization is not clean, and the remanence accumulation caused by long-term work, the remanence of ferromagnetic objects is ubiquitous. The magnetism is an order of magnitude larger and must be dealt with. Especially for fields such as aircraft carriers that have high requirements on the magnetic environment, if the magnetic field interference cannot be eliminated, serious safety accidents may result. Demagnetization is the basis and premise of local magnetic interference elimination. At present, the traditional demagnetization method needs to remove the internal ferromagnetic components of the carrier and put them in a fixed demagnetization machine for demagnetization. This is inconvenient and...

AI Technical Summary

Problems solved by technology

Especially for aircraft carriers and other fields that have high requirements on the magnetic environment, if the magnetic field interference cannot be eliminated, serious safety accidents may be caused

Demagnetization is the basis and premise of local magnetic interference elimination. At present, the traditional demagnetization method needs to remove the ferromagnetic components inside the carrier and put them in a fixed demagnetization machine for demagnetization. This is inconvenient and easy to cause damage to some precision equipment.

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