Published in Russian Journal of Nondestructive Testing
AbstractAppropriate sensors and measuring systems are required to gather information on the fatigue state of technical devices and predict their residual life and reliability. We consider the possibility of using bonded foils, made of ferromagnetic materials, for creating wireless primary transducers of fatigue hours of a structure member. It is sh...
Published in Russian Journal of Nondestructive Testing
AbstractThe algorithm makes it possible to simplify the procedure for processing results of the thermal testing aimed at both revealing latent defects and evaluating their transverse dimensions and shape. Applying this algorithm requires certain participation and experience of the thermography operator, as well as preliminary preparation of initial...
Published in Russian Journal of Nondestructive Testing
AbstractBased on the analysis of the results of acceptance and operational inspection of rails, we formulate tasks to improve procedures for ultrasonic acceptance inspection of rails. An algorithm developed by the authors for calculating the amplitude of the echo signal from an arbitrarily shaped planar reflector is described, and a piece of the de...
Published in Russian Journal of Nondestructive Testing
AbstractResults of trialing eddy-current testing techniques, validated on real operational defects and realistic artificial defects in the most critical parts, are presented. Significant differences have been established in the detectability of defects by various devices used in the industry according to various technological documentation. A metho...
Published in Russian Journal of Nondestructive Testing
AbstractWe consider the issues of expanding the range of measuring the shape and determining the deformation of a surface by wavefront detection methods such as holographic and speckle interferometry and speckle photography, based on a two-beam Jamin interferometer equipped with an image shifting device. A design has been developed for the two-beam...
Published in Russian Journal of Nondestructive Testing
Abstract—Defects in the grouting layer are hidden problems of underground engineering quality, while it plays an important role in the stability of the overall structure of the tunnel segment, the earth pressure transmission and impermeability. There is no accurate means for the detection of the grouting layer so far. As a non-destructive testing m...
Published in Russian Journal of Nondestructive Testing
AbstractTo increase the signal-to-noise ratio when testing materials with a high level of absorption, it has been proposed to use complex signals, formed on the basis of code sets employed in Code Division Multiple Access (CDMA) technology, as probing signals. The code sequences in the code sets have a low level of cross-correlation function and a ...
Published in Russian Journal of Nondestructive Testing
AbstractThe structural–phenomenological approach used to classify and split acoustic-emission signals into energy clusters, together with the parameters of detection frequency and weight content of location pulses in the clusters, allows real-time monitoring of main trends in damage accumulation at different structural levels and makes it possible ...
Published in Russian Journal of Nondestructive Testing
AbstractWe investigated the features of defects on the rod and the “rod–end-terminal” contact of polymer and porcelain insulators using the developed integrated method for noncontact remote diagnostics of the performance of high-voltage insulators, including the initial detection of local areas with elevated electric-field gradients and the measure...
Published in Russian Journal of Nondestructive Testing
AbstractTo ensure the high speed of composing synthesized images with matrix antenna arrays, industrial ultrasonic-tomography systems require computationally efficient spatiotemporal signal-processing algorithms. FFT-based algorithms with calculations in the frequency domain are of great interest in this connection. At the same time, the algorithms...
