A K-band microwave interferometer for non-destructive sensing of high frequency low amplitude (nm) vibration is demonstrated. This sensor uses direct-conversion receiver architecture with a phase shifter to adjust its sensitivity while varying the target distance. Detection of nanoscale vibration and laser-generated ultrasound waves through thin aluminum plate are measured and then compared wit...

Many materials used in construction and other applications can be characterized by two or more important physical strength properties. In assessing the acceptability of the materials the individual strength means and standard deviations are clearly important. In addition, the correlation between the various strength properties is also very important. For physical structures subject to a variety...

The objective of this paper is to show that time-reversal invariance can be exploited in acoustics to create a variety of new methods in non-destructive testing. Two different approaches will be discussed. The first one is the iterative time reversal process. It is an adaptive technique that can be used to detect flaws in complex samples with arrays of transducers. A second technique will also ...

The contribution deals with state of the art non-destructive testing method – active infrared thermography. The method can be used for revealing of defects and inhomogenities inside the bodies, e.g. bubbles and cracks in materials, which can have crucial importance from the point of view of their physical-mechanical properties. Goal of the research is theoretical evaluation of the performance o...

The application of modern non-destructive testing methods on grain quality testing had important implications for grain production, distribution and sale. In the paper, five test methods of modern electronic information technology, which were near-infrared spectroscopy, electronic nose, machine vision, magnetic resonance and acoustic vibrations, were described, the research progress of near-inf...

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