ELECTROMAGNETICS

This SwRI-developed eddy current inspection system uses a three-axis scanner to inspect the small blades of the space shuttle's auxiliary power units. The sensing coil is only 0.3 mm (0.013 in) in diameter, to allow inspection of the blades extremely close to the disk rim.

This SwRI-developed eddy current probe array was developed to provide improved inspection performance, speed, and coverage for the AlliedSignal 731 turbine disk. The probe has 16 coils, which are interfaced to the eddy current instrument using an SwRI-developed multiplexer unit.