Magnetic property evaluation method and magnetic property evaluation equipment
An evaluation method and a technology of magnetic properties, applied in the direction of magnetic performance measurement, etc., can solve problems such as differences in magnetic properties
Active Publication Date: 2019-05-03
DAIDO ELECTRONICS CO LTD
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Problems solved by technology
In general, even if the same material and the same method are used to manufacture magnet materials, there will inevitably be differences in the magnetic properties of each magnet material after being magnetized
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Embodiment Construction
[0033] Hereinafter, a magnetic property evaluation method and a magnetic property evaluation apparatus according to an embodiment of the present invention will be described with reference to the drawings.
[0034] (Magnetic characteristic evaluation equipment)
[0035] A magnetic property evaluation apparatus according to an embodiment of the present invention includes an electromagnetic induction measurement device 1 that performs electromagnetic induction measurement on a sample S in an unmagnetized state. figure 1 and figure 2 The configuration of the electromagnetic induction measuring device 1 according to the embodiment of the present invention is briefly shown.
[0036] Such as figure 1As shown, the electromagnetic induction measuring device 1 provided in the magnetic property evaluation apparatus according to the embodiment of the present invention includes an inspection coil 10 which is an assembly composed of an excitation coil 11 and a detection coil 12 . The ex...
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The present invention relates to a magnetic property evaluation method and a magnetic property evaluation apparatus. The magnetic property evaluation method comprises: an evaluation sample measuring process for performing electromagnetic induction measurement on an evaluation sample formed by an unmagnetized magnet material, wherein an alternating magnetic field is applied to the sample, and an induced current is generated in the sample and detected by synchronous detection so as to obtain a synchronous detection signal; a standard sample measuring process for performing the electromagnetic induction measurement on a plurality of unmagnetized standard samples formed in a substantially same mode with the evaluation sample; a magnetic property value measuring process for magnetizing the plurality of standard samples and measuring magnetic properties of the plurality of standard samples; a corresponding process for estimating relationships between synchronous detection signals of the plurality of standard samples and magnetic property values of the plurality of standard samples; and an evaluating process for estimating, based on the estimated relationships, a magnetic property value of the evaluation sample according to the synchronous detection signal of the evaluation sample.
Description
technical field [0001] The present invention relates to a magnetic property evaluation method and a magnetic property evaluation device. In more detail, the present invention relates to an evaluation method and an apparatus using the method of evaluating the magnetic characteristics of a magnet material to be magnetized in a state where the magnet material is not yet magnetized. Background technique [0002] Magnets having excellent magnetic properties such as high residual magnetic flux density have been developed, typically such as rare earth magnets and the like (for example, Patent Document 1). This type of magnet is usually inconvenient to transport in the magnetized state due to its high magnetic properties. Therefore, the manufacturer usually ships (ships) the magnet in an unmagnetized state, for example, from a factory, and then a buyer, user, etc. magnetizes the magnet after purchase. In general, even if the same material and the same method are used to manufactur...
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IPC IPC(8): G01R33/12
CPCG01R33/12
Inventor 渡边裕之小原一浩佐藤孝典
Owner DAIDO ELECTRONICS CO LTD