Rail destruction detection method based on magnetostriction and longitudinal ultrasonic guided wave
A technology of ultrasonic guided wave and magnetostriction, which is applied in the direction of using sound wave/ultrasonic wave/infrasonic wave to analyze solids, etc. It can solve problems such as shallow detection depth, difficult coupling, and radiation hazards to the human body.
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[0056] A rail damage detection device based on magnetostriction and longitudinal ultrasonic guided waves has the advantages of long detection distance, short detection time, real-time detection during online operation of a non-contact rail inspection vehicle, and early crack damage of the rail can be found. Its mechanical parts such as figure 1shown. Its appearance is a cuboid with an open lower end, the shape of the lower end opening is similar to the shape of the rail head, slightly larger than the rail to ensure its non-contact with the rail; the upper part is connected with the rail inspection vehicle. It includes inner layer wire holder 2, inner layer coil 3, outer layer wire holder 4, outer layer coil 5, yoke iron 6, permanent magnet 7, shell 8, current input port 9, electrical inner layer coil current input wire 10, inner Layer coil current output wire 11, outer coil current output wire 12, outer coil current loop wire 13, voltage output port 14, specifically as fig...
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