TUBE INSPECTING APPARATUS AND TUBE INSPECTING METHOD

摘要

PROBLEM TO BE SOLVED: To obtain an apparatus and method for inspecting tube capable of satisfactorily detecting a corroded part generated at a gas conduit tube. SOLUTION: The tube inspecting apparatus comprises an inspecting mechanism for checking the state of a tube 7 mounted on an in-tube traveling truck 2 movable in the tube 7 to generate an ultrasonic wave in the tube by the electromagnetic action to check the state of the tube by obtaining a reflected signal returned from the tube. The mechanism has an electromagnetic ultrasonic probe 12 and a resonance processor 140 for generating the wave by sweeping the frequency in the tube 7 via the probe 12 to obtain a resonance frequency by processing the signal by a resonance process.