testing (NDT) capabilities by inspecting a 160-meter chimney at a thermal power
plant in Japan. The inspection was conducted using an ultrasonic testing (UT)
drone developed by Terra Drone group company Terra Inspectioneering.
A major component of the chimney inspection was to measure
the thickness of the steel plate in the chimney flue. Conventionally, this
would have been done manually by shutting down the facilities, putting up
temporary scaffolding, and having human inspectors climb the chimney.