Magnetostrictive twist guided wave sensor for rail bottom defect detection
A defect detection and magnetostriction technology, which is applied in the direction of material analysis, instruments, and measuring devices using sound waves/ultrasonic waves/infrasonic waves, can solve the problems of sensor use, poor defect detection effect, and no integrated sensors, etc., to achieve prevention The effect of accidents and large economic benefits
Active Publication Date: 2014-04-02
HANGZHOU ZHEJIANG UNIV JINGYI ELECTROMECHANICAL TECH ENG
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Abstract
The invention discloses a magnetostrictive twist guided wave sensor for rail bottom defect detection. The magnetostrictive twist guided wave sensor disclosed by the invention is of an open-close type structure, wherein a left clamping plate and a right clamping plate are hinged at the two sides of a bottom supporting plate respectively, the bottom supporting plate is installed on the lower surface of the rail bottom of a rail, the left clamping plate and the right clamping plate are installed at the two sides of the rail web of the rail respectively, and the left clamping plate and the right clamping plate are attached to the upper surfaces of the rail web and the rail bottom of the rail; four comb-shaped arrays are installed between a first support shell and a second support shell; each of the comb-shaped arrays comprises a magnetostrictive material layer, an excitation coil layer and a permanent magnet layer; the excitation coil layer wraps the periphery of the magnetostrictive material layer and then the permanent magnet layer covers on the excitation coil layer, the second support shell is used as an elastic wave transfer layer, the left clamping plate is connected with the excitation coil layer in the bottom supporting plate by a flexible flat cable, and the right clamping plate is connected with the excitation coil layer in the bottom supporting plate by a flexible flat cable. The invention discloses a guided wave sensor designed aiming at the special section of the rail and capable of exciting a twist guided wave with a single mode.
Application Domain
Ultrasonic/sonic/infrasonic wave generation
Technology Topic
MagnetEngineering +3
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