This paper presents a novel instrument for the analysis of signals coming from a matrix of differential variable reluctance transducers (DVRTs). The signal processing technique is based on a fast Fourier transform (FFT) evaluation. The main objectives are compactness and a short elaboration time. In particular, information from up to 11 different sensors can be simultaneously processed with an overall measuring time of about 300 /spl mu/s. Experimental results show a standard deviation in the /spl plusmn/0.3 /spl mu/m order.
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Flammini et al. (2005) studied this question.
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