Patent ID: 8770028
Filing Date: 2014-07-08
Classification: G01N

Abstract:
1. Device for nondestructive determination of a rotational movement on a surface of a specimen, comprising: a. a transmitter configured to transmit a temporal sequence of excitation signals Si adapted to penetrate into the specimen at least to some extent and interact with corrosion of the specimen, b. an array comprising a plurality of receivers configured to receive echo signals, which result from the interaction of the excitation signals Si transmitted by the transmitter with said corrosion, wherein the echo signals for one of the excitation signals Si, which are absorbed by the plurality of receivers, form a set M (Si) of measurement values, and c. an evaluation unit configured to determine a rotational movement of the array on the surface from a plurality of measurement value sets M (Si) which are correlated with temporally sequential excitation signals Si.