6 Common techniques to monitor the quality of fruit at the time of harvest and in storage typically rely on destructive methods to measure physical properties such as firmness and hydration. The complex, inhomogeneous composition of most fruit mean that non-destructive ultrasonic methods for quality evaluation of fruit has typically been unsuccessful. A novel ultrasound method was developed whi...

| For large aerospace structures, it is extremely important to detect faults, and non-destructive testing is the only practical way to do it. Based on measurements of ultrasonic waves, Eddy currents, magnetic resonance, etc., we reconstruct the locations of the faults. The best (most eecient) known statistical methods for fault reconstruction are not perfect. We show that the use of expert know...

Modern sonar and radar measurement systems are widely used in the field of nondestructive testing for a long time. Usually reference signal is emitted towards the object to be investigated and we get a signal, which is the sum of reference signal reflected from different plies. The task of signal processing is to determine time instances corresponding positions of certain ply, which allow analy...

MEMS ultrasonic transducers are potentially valuable in both medical and non-destructive testing applications. A prime advantage of these transducers is their wide bandwidth together with the potential for economical fabrication of detector arrays. In this paper, we discuss issues related to the coupling of these transducers to solid and liquid media. We will show that appropriate choice of the...

The paper aims to present the experimental data retrieved after ultrasonic non-destructive testing on metallic particle reinforced polymeric composite materials. The particles’ size (μm), volume fraction as well as the matrix material (different types of polymeric materials – e.g. epoxy, vinyl epoxy, etc.) has their influence on the overall elastic characteristics of the composite material. On ...

Non-destructive testing (NDT) of engineering materials, components and structures has steadily increased in recent years at an unprecedented rate because of all-round thrust for improving material quality, component integrity and performance reliability. Ultrasonic testing is a versatile NDT method, which is applicable to most materials, metallic or non-metallic. The relevance of computed tomog...

This paper explains non-linear non-destructive evaluation of concrete aimed at examining the occurrence of non-linearity under non-linear wave propagation through the concrete. Standard cubic concrete sections in damaged and undamaged conditions were investigated. The specimen was first damaged under compression testing and then subjected to non-linear ultrasonic evaluation in two directions i....

Burnt bricks lined with mortar were among the materials used in the construction of historical load-bearing structures. The need to know the strength characteristics of masonry material arises during repairs of historical structures and their subsequent static securing. These can be investigated either by sampling a masonry specimen, or the employment of non-destructive testing methods. With de...