A micro-magnetic detecting method includes the steps of: detecting a magnetic induction intensity along a first direction on a surface of a detected object to generate a detection signal, determining whether an amplitude of the detection signal is an anomalous value at a first position of the surface of the detected object, wherein the anomalous value is a value which is inconsistent with a linear value of the detection signal at the first position, and the linear value is a value that satisfies a linear relationship of the detection signal, and determining there is a defect at the first position of the detected object in case that the amplitude of the detection signal is the anomalous value. Accordingly, it detects the magnetic induction intensity on the surface of the detected object so as to detect its surface and internal defects when it remains in its original status.

Embodiments provide a magnetic shield for wireless power chargers and a method of manufacturing the same. The method includes forming flake powder having flake-type particles, forming an oxide film by performing oxygen heat treatment on the surface of the flake powder, performing insulation treatment on the surface of the flake powder provided with the oxide film formed thereon, and producing a sendust block by mixing and melting the insulation-treated flake powder and insulative resin powder. Therefore, a magnetic shield having high insulation characteristics and magnetic permeability may be provided.

The present invention relates to diagnostic device for the characterization of electromagnetic material properties and a method of making and using same. Unlike current diagnostic devices, the diagnostic device comprises a novel waveguide system and is suitable for the characterization of electromagnetic material properties such as permittivity, permeability, and the loss tangent of materials over a broad temperature and pressure range.

The present invention is a ferrobody magnetic permeability mapping system including a ferrobody material, a first magnetic generator, a second magnetic generator in electrical communication with the first magnetic generator and configured to present an alternating magnetic field, a control circuit configured for alternating operation of the first and second magnetic generators; the magnetic permeability sensor being configured for measuring the magnetic permeability of the ferrobody material in response to the alternating magnetic field; the magnetic permeability sensor including a matrix comprising at least one row select circuitry and at least one column select circuitry wherein the magnetic permeability of the ferrobody material is obtained by the row select circuitry and the column select circuitry where magnetic permeability values of the ferrobody material is obtained at multiple locations within the alternating magnetic field.

The probe for measuring a magnetic permeability of a magnetic material includes a transmission line body including a strip-shaped strip conductor formed on a front surface of a dielectric substrate and a ground conductor formed on the front surface or a back surface of the dielectric substrate; a first connector connected to one end of each of the strip conductor and the ground conductor; and a second connector connected to the other end of each of the strip conductor and the ground conductor, in which the strip conductor includes a first length portion including a portion connected to the first connector on one end side, a second length portion including a portion connected to the second connector at the other end, and a third length portion extending between the first length portion and the second length portion, and the third length portion includes a current deviation prevention unit.

This application proposes a magnetic coupling coil optimization method. The method comprises: calculating an equivalent magnetic permeability of a magnetic coupling coil based on an air gap length of the magnetic coupling coil; calculating an effective cross-sectional area of the magnetic coupling coil based on the equivalent magnetic permeability and the power of the magnetic coupling coil; calculating a number of turns of the secondary winding of the magnetic coupling coil based on the effective cross-sectional area and the equivalent magnetic permeability; optimizing the magnetic coupling coil based on the number of turns of the secondary winding. The present application can reasonably configure the parameters of the magnetic coupling coil, effectively acquire energy from the power grid to provide stable power for detection or communication equipment in the power grid, and make the magnetic coupling coil more reliable while meeting the power demand.

A method for detecting magnetic fields, particularly for detecting the position of objects with a preferably oblong, soft-magnetic element, which is connected to electronics, with via the electronics the impedance of the soft-magnetic material is measured, characterized in that a magnetic field is used in which by the position of an object which is located in an arrangement with the soft-magnetic material the magnetic field develops at the location of the soft-magnetic material, with the magnetic permeability of the soft-magnetic material adjusting, depending on the magnetic field and thus the position of the object. A respective device serves for applying the method according to the invention.

An apparatus and method, directed to measuring permeability of a magnetoelectric sample, are described. The apparatus includes a sample holder configured to present the magnetoelectric sample to a permeability analyzer for measurement of the sample's permeability, and to facilitate application of a DC voltage to the sample in a way that isolates the DC voltage from the permeability analyzer. The described apparatus and method may be used to measure the permeability values associated with the magnetoelectric sample with respect to a range of DC voltages applied to the sample, while protecting the measuring instrumentality from damage from the applied DC voltages.

A sensor apparatus for determining and/or monitoring a process variable of a medium in a containment includes: a crystal body including at least one defect; a magnetic field system for producing a magnetic field in the region of the crystal body and in the region of the medium within the containment, wherein the crystal body and the magnetic field system are arrangeable from the outside at a wall of the containment; a detection unit for detecting a magnetic field-dependent, fluorescent signal from the crystal body, wherein the detection unit has an excitation unit for optical exciting of the defect and a detector for detecting the fluorescent signal; and an evaluation unit for ascertaining at least one piece of information concerning the process variable based on the fluorescent signal.

The measurement device for measuring permeability and permittivity of an object, includes a probe in which a signal transmission line is formed and on which the object is capable of being disposed close to or in contact with the signal transmission line; a magnetic-field application unit configured to apply a magnetic-field to the object; a signal measurement instrument configured to measure a signal transmitted through the signal transmission line in each state in which the object is disposed and not disposed on the signal transmission line and in each state in which the magnetic-field is applied and not applied; a permeability processing unit configured to obtain the permeability of the object; and a permittivity processing unit configured to obtain the permittivity of the object, the both units obtaining based on the signal transmitted through the signal transmission line in each state in which the magnetic-field is applied and not applied.