Apparatus and method for identifying defects on objects or...

Details Apparatus and method for identifying defects on objects or... Apparatus and method for identifying defects on objects or...

2005-07-18

2008-10-28

Nguyen, Ha (Department: 2829)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

C324S238000

Reexamination Certificate

active

07443156

ABSTRACT:
Apparatus and associated method for identifying defects on objects provide for—under computer driving—the AC voltage energization of at least one transmitting coil to be simultaneously effected by a carrier signal, and for an essentially amplitude-modulated received signal to be received by means of at least one receiving coil; what is carried out, furthermore, is a demodulation not only of the carrier signal contained in the received signal by means of magnitude and phase formation, but also a demodulation of the harmonics of the carrier which are contained in the received signal, likewise by means of respectively associated magnitude and phase formation, to be precise preferably by using a Fourier or wavelet transformation method.

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