An omnidirectional dual-mode lamb wave electromagnetic acoustic sensor
An electromagnetic sound and sensor technology, which is applied in the generation of ultrasonic/sonic/infrasonic waves, the use of sonic/ultrasonic/infrasonic waves for material analysis, instruments, etc. Neat and delicate coil arrangement
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[0025] The present invention will be further described below in conjunction with the accompanying drawings and examples, and the following examples are only descriptive and not restrictive, and cannot be used to limit the protection scope of the present invention.
[0026] like figure 1 , is a structural schematic diagram of the omnidirectional dual-mode Lamb wave electromagnetic acoustic sensor of the present invention; it includes a cylindrical NdFeB magnet 1 and an FPC double-layer coil 2 . The cylindrical NdFeB magnet 1 is placed directly above the FPC double-layer coil 2, polarized along the thickness direction, and can generate a static magnetic field perpendicular to the surface of the structure. The FPC double-layer coil 2 adopts double-layer wiring, the upper layer is a spiral coil 3, and the lower layer is a ring-shaped coil 4.
[0027] The cylindrical NdFeB magnet 1 such as figure 1 As shown, the polarization is along the thickness direction, the diameter D is 25m...
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