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Device for measuring magnetostriction in dual-channel capacitance method and method thereof

A technology of magnetostriction and capacitance method, applied in the field of measurement, can solve problems such as the influence of measurement results and the influence of measurement accuracy, and achieve the effects of high sensitivity, reduction of mechanical errors and low cost

Active Publication Date: 2012-10-03
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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AI Technical Summary

Problems solved by technology

Because the order of magnitude of the magnetostriction coefficient is very small, at 10 -3 -10 -7 range, so the mechanical error caused by fixing the sample or linking with the lever will affect the measurement result
The above factors have a negative impact on the magnetostrictive properties of the measured sample, affecting the accuracy of the measurement

Method used

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  • Device for measuring magnetostriction in dual-channel capacitance method and method thereof
  • Device for measuring magnetostriction in dual-channel capacitance method and method thereof
  • Device for measuring magnetostriction in dual-channel capacitance method and method thereof

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Embodiment Construction

[0052] The embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0053] Such as figure 1 A device for measuring magnetostriction by a two-channel capacitance method is shown, including a sample position and probe position adjustment mechanism 1 , a displacement data processing system 2 and an external magnetic field 18 .

[0054] Among them, the sample position and probe position adjustment mechanism 1 is located on the base 15, including: a sample holder 3, used to fix the above-mentioned sample 14, two adjustable sensors 6-1, 6-2 are arranged at both ends of the sample 14, and the sensor The front ends of 6-1 and 6-2 have a first probe electrode 8-1 and a second probe electrode 8-2, the probe electrodes 8-1, 8-2 are arranged coaxially with the sample 14, and the planes at both ends of the sample 14 are respectively connected to The probe electrodes 8-1, 8-2 form an air-dielectric capacitance.

[0055...

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Abstract

The invention belongs to the technical field of measurement, and particularly relates to a device for measuring magnetostriction in a dual-channel capacitance method and a method thereof. The device comprises a sample position and probe position adjusting mechanism (1), external magnetic fields (18) at the two ends of the sample position and probe position adjusting mechanism (1) and a displacement data processing system (2) with a first electrical box channel (11) and a second electrical box channel (12). In accordance with the principle of a parallel plate capacitor, the amount of extension or contraction of a sample is measured indirectly via measuring changes in the capacitance between a movable sample electrode formed by two groups of samples (14) and a fixed electrode formed by probe electrodes (8-1 and 8-2) in the external magnetic fields, and thus the measurement of magnetostriction is completed and is displayed via dual channels. The device for measuring the magnetostriction in the dual-channel capacitance method has the advantages of simple structural design, high accuracy of measurement and high reliability.

Description

technical field [0001] The invention belongs to the technical field of measurement, and in particular relates to a device and method for measuring magnetostriction by a dual-channel capacitance method, which is suitable for measuring the magnetostriction of a sample, and is especially suitable for the magnetostriction of a rod-shaped sample with a small cross-sectional area. Background technique [0002] Under the action of an external magnetic field, the scale of ferromagnetic materials will change. This phenomenon is called magnetostriction. Magnetostrictive materials are important functional materials for energy and information conversion, and the magnetostrictive coefficient is undoubtedly the most critical magnetic parameter. Since the magnitude of the magnetostrictive coefficient is small, it is within 10 -3 -10 -7 range, so achieving accurate measurements is a technical challenge. [0003] According to the existing technical conditions, the measurement methods of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/18
Inventor 郭金花冯硕倪晓俊卢志超李德仁薄希辉周少雄
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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