The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 06, 2026
Filed:
Jul. 07, 2025
Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, CN;
Abstract
The present disclosure provides a method for estimating a noise of a soft magnetic core, including: acquiring a soft magnetic core, where an excitation coil is wound around the soft magnetic core; measuring an impedance value of the excitation coil under a natural geomagnetic field by frequency sweeping, and determining a peak frequency point when the impedance value reaches a peak; measuring, under different direct current bias magnetic fields, an inductance value and a resistance value of the excitation coil at the peak frequency point along an axial direction of the soft magnetic core to respectively obtain an unsaturated inductance value and a resistance peak value of the soft magnetic core; and obtaining an equivalent noise of the soft magnetic core based on the unsaturated inductance value and the resistance peak value.