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Dynamic
excitation is a special
technique of isi-sys
for non destructive testing.
During the sweep the vibration modes are visible in real-time. The
example (left) shows selected images of C-Si-C composite (sweep 1-20kHz)
with an in service dis-bond in the middle. Further data processing
enables determination the mechanical properties of the defect area.
The
evaluation process is based on light phase measurement of the vibrating de-lamination
of the C-Si-C composite vibrating at 20kHz. Further processing yields to
amplitude and phase of the object vibrated.
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