Giant magnetostrictive vibration source

Abstract

The invention discloses a giant magnetostrictive vibration source which comprises an exciting coil (5), a magnetostrictive material rod (6) is arranged in the exciting coil (5) in the axial direction, an elastic vibration output piece (14) is arranged in the telescopic end direction of the magnetostrictive material rod (6), and a limiting end cover (3) is arranged at the end, away from the telescopic end, of the magnetostrictive material rod (6), when the magnetostrictive material rod (6) deforms in the direction of the telescopic end under the action of the excitation coil (5), the detection end of the elastic vibration output piece (14) moves in the deformation direction of the elastic vibration output piece (14). By transmitting a step excitation signal to the excitation coil, the giant magnetostrictive material rod is triggered to excite so as to generate vibration.

Description

technical field

[0001] The invention relates to the technical field of elastic wave non-destructive testing, in particular to a giant magnetostrictive vibration source. Background technique

[0002] For all kinds of metal devices and equipment that have been fixed and installed, when detecting their damage, corrosion, etc., the method of dismantling or taking them out is generally used for direct observation. However, for a large amount of engineering or expensive equipment, the energy or manpower consumed for dismantling or taking it out is extremely high, and it is not suitable to take it out for inspection.

[0003] For example, the grounding grid, which exists in every link of the power system, is an extremely important part of the power system. Due to the limitation of economic conditions, a large amount of steel is used in my country's grounding grid. The traditional grounding grid generally uses galvanized flat steel. Recently, copper-clad flat steel has also been us...

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