Microwave Nondestructive Testing for the Underground Pressure Pipeline

摘要

Detecting the underground pressure pipelines with microwave method is put forward in this paper. Based on microwave theory, an open-ended waveguide sensor is used to scan the underground pipelines with crack or in it. A method to deal with the shortcoming of traditional technologies is proposed by compared with this kind of untouchable microwave testing. The presence of the crack causes higher order modes to be generated which in turn influence the properties of the standing wave set up inside the waveguide. Strategic probing of the standing wave properties is used to indicate the presence of a crack. It provides an important basis for the crack evaluation and reparation.