of Support Plate Fretting Wear
Figure 7 - Calculated phase of the dector signal, when located underneath the plate. Exciter at 50 mm (2 in.) distance, carrying 300 mA at 200 Hz.
Figure 8 - Calculated influence of frequency on detector signal when detector is directly beneath the plate. The exciter carries 300 mA at 200 Hz and is at 50 mm (2 in.) from plate center. Exciter-detector spacing is 50 mm (2 in.).
Figure 9 - Experimental depth gaging of full circumferential grooves under 6.34 mm (0.25 in.) thick support plate. Detector is centered under plate. Exciter-dector spacing is 50 mm (2 in.) and I= 300 mA.
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