An Automated Sensing System for Steel Bridge Inspection Using GMR Sensor Array and Magnetic Wheels of Climbing Robot

Table 2

Parameters of the defects.

Type	Photography	Size
Metal loss		Length: 200 mm; Width: 24 mm; Depth: 6 mm
Crack		Length: 150 mm; Width: 1.5–3 mm; Depth: 6 mm
Corrosion		Length: 95 mm; Width: 65 mm; Depth: unknown