Humidity detector based on inverse magnetostriction effect

A technology of humidity detector and inverse magnetostriction, which is applied in the direction of material magnetic variable, etc., can solve the problems of small humidity detection range and low humidity detection sensitivity, and achieve the effect of high sensitivity detection

Inactive Publication Date: 2021-01-12
刘翡琼
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional humidity detection is based on resistance or capacitance changes, the sensitivity of humidity detection is low, and the range of humidity detection is small

Method used

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  • Humidity detector based on inverse magnetostriction effect
  • Humidity detector based on inverse magnetostriction effect
  • Humidity detector based on inverse magnetostriction effect

Examples

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Effect test

Embodiment 1

[0021] The invention provides a humidity detector with inverse magnetostrictive effect. Such as figure 1 As shown, the humidity detector based on the inverse magnetostrictive effect includes a magnet 1, a giant magnetostrictive material block 2, a first iron yoke 3, a second iron yoke 4, a third iron yoke 5, a groove 6, polyamide imine material. The material of the giant magnetostrictive material block 2 is a rare earth giant magnetostrictive material, and the electromechanical coupling coefficient of the rare earth giant magnetostrictive material is high. Preferably, the material of the giant magnetostrictive material block 2 is terbium dysprosium iron giant magnetostrictive material. The magnet 1 can be an electromagnet, that is, an electromagnet, or a permanent magnet, which is not limited here. Both ends of the magnet 1 are respectively connected to the first iron yoke 3 and the second iron yoke 4 . Such as figure 1 As shown, the two ends of the magnet 1 are perpendic...

Embodiment 2

[0026] On the basis of Example 1, such as figure 2 As shown, the shape of the groove 6 is a rectangle, and the long side of the rectangle is perpendicular to the giant magnetostrictive material block 2 . In this way, the long sides of the rectangle block the magnetic circuit, and the magnetic circuit must be deflected along the direction perpendicular to the giant magnetostrictive material block 2, and after the deflection, it must be deflected along the direction of the giant magnetostrictive material block 2, thus significantly Increase the length of the magnetic circuit in the giant magnetostrictive material block 2, as mentioned above, this is conducive to the polyimide material to change the magnetic permeability of the giant magnetostrictive material block 2 more, thereby changing the gap 7 more The magnetic field at the place can improve the sensitivity of humidity detection. On the other hand, in the direction of the short side of the rectangle, the expansion of the ...

Embodiment 3

[0028] On the basis of Example 1, such as image 3 As shown, the shape of the groove 6 is a right-angle L shape, and one side of the right-angle L shape is perpendicular to the giant magnetostrictive material block 2 . In this way, the right-angle L-shaped groove 6 changes the magnetic field coupling in different directions in the giant magnetostrictive material block 2, and the expansion of the polyimide material in the groove 6 will change the giant magnetostrictive material block 2 more. The effective magnetic permeability inside, so as to change the magnetic field at the gap 7 more, so as to improve the sensitivity of humidity detection more.

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Abstract

The invention relates to the field of humidity detection, and particularly provides a humidity detector based on the inverse magnetostriction effect; two end faces of a magnet are respectively connected with a first iron yoke and a second iron yoke, the other end of the first iron yoke is connected with one end face of a giant magnetostriction material block, and the first iron yoke is perpendicular to the giant magnetostriction material block. The other end face of the giant magnetostrictive material block is connected with a third iron yoke, the third iron yoke is perpendicular to the giantmagnetostrictive material block, a gap is formed between the second iron yoke and the third iron yoke, a groove is formed in the giant magnetostrictive material block, and a polyimide material is arranged in the groove. During application, the giant magnetostrictive material block is placed in a to-be-detected environment, pressure is applied between the first iron yoke and the third iron yoke, and environment humidity detection is achieved through a magnetic field at the detection gap. The humidity sensor has the advantages of high humidity detection sensitivity and wide measuring range.

Description

technical field [0001] The invention relates to the field of humidity detection, in particular to a humidity detector based on an inverse magnetostrictive effect. Background technique [0002] Humidity involves various fields of engineering technology and national life. With the development of science and technology and the improvement of people's living standards, the requirements for the sensitivity of humidity detection are getting higher and higher. Traditional humidity detection is based on changes in resistance or capacitance, the sensitivity of humidity detection is low, and the range of humidity detection is small. Contents of the invention [0003] In order to solve the above problems, the present invention provides a humidity detector based on the inverse magnetostrictive effect, including: a magnet, a giant magnetostrictive material block, a first iron yoke, a second iron yoke, a third iron yoke, a groove , polyimide material, the two ends of the magnet are re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/76
CPCG01N27/76
Inventor 不公告发明人
Owner 刘翡琼
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