An ultrasonic phased array consists of multiple ultrasonic probes arranged in a certain
regular order, and the delay time of the excitation signal sent to each array element is …

The elastic-wave scattering at interfaces, such as cracks, is essential for nondestructive
inspections, and hence, understanding the phenomenon is crucial. However, the elastic …

In this paper, we extend a piezoelectric and laser ultrasonic system (PLUS) to a high-
frequency version for high-sensitivity three-dimensional (3D) ultrasonic imaging by utilizing …

This paper reports the effectiveness of a novel imaging system, piezoelectric and laser
ultrasonic system (PLUS), for the three-dimensional (3D) imaging of fatigue cracks with a …

Beam forming using phased arrays forms the basis of several sonar communication and
biomedical imaging techniques. However, to date, such arrays remain constrained by wave …

As a high-resolution 3D phased-array imaging method, a piezoelectric and laser ultrasonic
system (PLUS) was proposed, which is a combination of a piezoelectric transmitter and an …

Crack closure can cause the underestimation or misdetection of fatigue cracks in ultrasonic
testing (UT). Fatigue-crack closure due to an environmental factor, ie, high temperature, was …

In this study, the feasibility of the fusion sensing of eddy current testing (ECT) and ultrasonic
testing (UT) as effective tools to clarify the hydrogen-embrittlement mechanism of austenitic …

As a health monitoring tool of bolts in infrastructures, we propose a non-contact evaluation
method for the axial force of a bolt. Deformation of the bolt head is measured as an electrical …

Although the understanding of the nonlinear ultrasonic scattering at closed cracks is
essential for the practical application of nonlinear ultrasonic phased array, it has yet to be …