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

Figure 20

Voltage signals collected from data acquisition system. (a), (b), and (c) Showing the defect signals in the case of metal loss, crack, and corrosion. (d) The output signal of the standard output curve collected from data acquisition system.

(a)

(b)

(c)

(d)