Buried Stub Angle Inspection System

Stub angles of power transmission line are used to anchor and stabilize the lattice tower. The concern of the lattice tower is that its buried portion could be heavily corroded, and it would not be easily detectable from above ground. When the corrosion of these stub angles progresses to unsafe levels, the tower structure could catastrophically fail.

Guided Wave Testing (GWT) on buried stub angle uses a magnetostrictive sensor (MsS) probe installed at the top of the stub angle right above the ground. This convenient location allows ease of installation by requiring no excavation. The MsS probe generates the ultrasonic waves even without the use of a coupling medium.

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