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Application of pulse compression signal processing techniques to electromagnetic acoustic transducers for noncontact thickness measurements and imaging
2005
Review of Scientific Instruments
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A pair of non-contact EMATs has been used for thickness measurements and imaging of metallic plates. This was performed using wide bandwidth EMATs and pulse-compression signal processing techniques, using chirp excitation. This gives a greatly improved Signal to Noise Ratio (SNR) for non-contact experiments, increasing the speed of data acquisition. A numerical simulation of the technique has confirmed the performance. Experimental results indicate that it is possible to perform non-contact
doi:10.1063/1.1899310
fatcat:tswlwt34ejdznpw5b3dzjaaf2y