A nanocrystalline high-frequency magnetic characteristic detection device and measurement method under consideration of stress

A detection device and a technology of magnetic characteristics, applied in the direction of magnetic performance measurement, magnetic field measurement using the principle of magnetic flux control, and measuring devices, etc., can solve the problem that the distance of the yoke cannot be adjusted at will, the loss of the magnetic core, the high loss of the winding, and the limitation of the test Problems such as the shape and size of the sample can be solved to achieve the effect of improving the efficiency of popularization and use, small magnetic circuit loss, and high symmetry of the magnetic circuit structure.

CN108802638BActive Publication Date: 2021-04-13HEBEI UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2021-04-13

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Abstract

The invention discloses a detection system for high-frequency rotational magnetic properties of nanocrystals under stress, which includes a detection device for high-frequency rotational magnetic properties of nanocrystals under stress, a power amplifier, a differential amplifier circuit and a digital signal processing unit; The crystal high-frequency rotating magnetic characteristic detection device includes a magnetic circuit composed of two U-shaped magnetic cores interlaced at 90°. The magnetic core is cut from nanocrystalline strips and four square excitation windings are fixed on the magnetic At the top of the core, the lower magnetic core is fixed on the bracket by buckles. The sample to be tested is placed in the middle of the two magnetic cores, placed symmetrically, and hydraulic clamps are applied on both sides of the sample to apply stress to the sample. The height of the upper magnetic core can be adjusted by the buckle. Fixed on the bracket, the height of the magnetic core can be adjusted to adapt to samples of different sizes. Compared with the prior art, the system has a single structure, a clear and reasonable magnetic circuit, and simple manufacturing and processing of the magnetic core.
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Description

technical field

[0001] The invention relates to a novel magnetic characteristic detection device, in particular to a nanocrystal high-frequency magnetic characteristic detection device and a measurement method under consideration of stress. Background technique

[0002] The two-dimensional rotating magnetic characteristic detection technology is to excite the sample through the yoke, so that the sample to be tested is in the rotating magnetic field, and then through the B-H composite coil attached to the sample surface, the B signal and the H signal on the sample surface are collected, and the digital The signal processing process generates the B-H curve of the sample, thereby obtaining the magnetic properties of the sample.

[0003] In the prior art magnetic property detection device, the material constituting the magnetic yoke is a silicon steel sheet, which is relatively low in saturation magnetic permeability and low in saturation magnetic force. The excitation winding ...

Examples

Embodiment Construction

[0030] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0031] Such as figure 1 , 2 As shown in and 3, a kind of nanocrystal high-frequency rotational magnetic characteristic detection system under consideration of stress disclosed by the present invention includes a nanocrystal high-frequency rotational magnetic characteristic detection device under stress, power amplifier 15, differential amplifier circuit 16 and digital Signal processing unit; the nanocrystalline high-frequency rotating magnetic characteristic detection device includes a ma...