NON-DESTRUCTIVE INSPECTION DEVICE

The present invention relates to a non-destructive inspection device that magnetically inspects corrosion of a metal structure.

The present invention relates to a non-destructive inspection device that magnetically inspects corrosion of a metal structure.

Abstract

Provided is a non-destructive inspection device for inspecting thinning produced in the vicinity of the ground of a to-be-inspected body, which is erected on a ground surface by burying the base-end side thereof in the ground. A non-destructive inspection device having: magnetic probes comprising impression coils that impress a magnetic field on a to-be-inspected body, which is erected on a ground surface by the base-end side thereof being buried in the ground, and magnetic sensors that detect a response from the to-be-inspected body with respect to the magnetic field impressed by the impression coils; a current source for supplying an AC current having a prescribed frequency to the impression coils; a detector for detecting an output signal from the magnetic sensors; and an analyzer for performing analysis using an output signal from the detector, wherein the non-destructive inspection device detects a response from the to-be-inspected body in a first mode in which the magnetic field generated by the impression coil is impressed toward the vicinity of the around of the to-be-inspected body and a second mode in which the magnetic field is impressed on the to-be-inspected body by the impression coil at a position different front the position of the impression coil in the first mode.

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