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Contact sh-guided-wave magnetostrictive transducer

一种水平切变、磁致伸缩的技术，应用在磁致伸缩器件、磁致伸缩传感器、磁致伸缩器件的零部件等方向，能够解决难以控制剩余磁化强度等问题，达到高可靠性的效果

Inactive Publication Date: 2012-05-23
RES COOPERATION FOUND OF YEUNGNAM UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, it is difficult to control the strength of the residual magnetization

Method used

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  • Contact sh-guided-wave magnetostrictive transducer
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  • Contact sh-guided-wave magnetostrictive transducer

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Embodiment Construction

[0022] The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown.

[0023] figure 1 It is a cross-sectional view of the transducer band 300 of the contact horizontal shear (SH) type guided wave magnetostrictive transducer according to an embodiment of the present invention, figure 2 for figure 1 The perspective view of the plate-shaped solenoid 310 of the contact SH guided wave magnetostrictive transducer in image 3 It is a cross-sectional view showing the arrangement of the ring-shaped transducing band 400 of the contact-type SH guided-wave magnetostrictive transducer according to another embodiment of the present invention.

[0024] refer to Figure 1~3 , the contact SH guided wave magnetostrictive transducer includes two parts, namely two transducing bands 300, 400 and an RF coil (not shown). The transducer bands 300, 400, which are part of the contact-type SH g...

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PUM

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Abstract

A contact shear horizontal (SH) mode guided-wave magnetostrictive transducer including: a transduction band which is disposed on a surface of an object to be tested and in which electromagnetic acoustic transduction occurs; and radio frequency (RF) coils disposed on the transduction band, wherein the transduction band includes a plate-shaped solenoid including a magnetostrictive strip in which the electromagnetic acoustic transduction for transmitting or receiving SH mode guided waves occurs, and solenoid coil wound in a spiral form along a circumference of the magnetostrictive strip so as to form a bias magnetic field in a lengthwise direction of the magnetostrictive strip, and the RF coils are used to form a dynamic magnetic field in a widthwise direction of the magnetostrictive strip or to detect a change of magnetic flux in the magnetostrictive strip.

Description

technical field [0001] The invention relates to a contact-type horizontal shear (SH) guided wave magnetostrictive transducer, more particularly, relates to a magnetostrictive guided wave transducer used for long-distance ultrasonic non-destructive testing of industrial structures. Background technique [0002] SH-type guided waves are elastic waves with particle displacement parallel to the surface of a structure, and are guided by the boundaries of the structure, and can propagate over long distances. SH-type guided waves have the advantage that SH-type guided waves are insensitive to fluids that may be present on the inner or outer surfaces of the formation and have a low probability of mode conversion when interacting with discontinuities, A simple echo configuration that is easy to describe in long-distance ultrasonic testing can then be achieved. The SH0 mode guided wave and the T(0,1) mode guided wave are especially suitable for flat or curved plate structures and col...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R15/00H02N2/00
CPCG01N2291/0425G01N2291/2634G01N2291/0422G01N29/46H01L41/12G01N29/2418H10N35/00H04R15/00H02N2/00H10N35/80B06B1/08
Inventor 崔明善金星俊
Owner RES COOPERATION FOUND OF YEUNGNAM UNIV
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