The analysis of ultrasonic NDE data has traditionally been addressed by a trained operator
manually interpreting data with the support of rudimentary automation tools. Recently, many …

Composite materials are widely used in most industries due to their high specific strength,
specific stiffness, and their relatively lighter weight compared to other traditional materials …

A fully non-contact single-sided air-coupled and laser ultrasonic non-destructive system
based on the generation and detection of Lamb waves is implemented for the …

We demonstrate the possibility of selectively imaging the features of a barely visible impact
damage in a laminated composite plate by using an air-coupled time reversal mirror. The …

Time reversal is a technique to focus wave energy to a selected point in space and time,
localize and characterize a source of wave propagation, and/or communicate information …

Time reversal (TR) focusing of airborne ultrasound in a room is demonstrated. Various
methods are employed to increase the amplitude of the focus. These methods include …

A novel design of an air-coupled capacitive micromachined ultrasonic transducer (CMUT)
with annular cell geometry (annular CMUT) is proposed. Finite element analysis shows that …

Air-coupled ultrasonic techniques based on rapid and contactless inspection are useful for
various applications, such as ranging finding, surface profile measurement, and non …

The capability of air‐coupled transducers to send and receive ultrasonic signals to and from
the air opens up the use of ultrasonic methods to characterize materials, test components or …

考虑介质的衰减及其引起的频散对频域声场的影响, 提出幂函数衰减介质中圆形换能器声场的
解析公式. 基于该公式研究空气耦合超声换能器的轴向声压与径向声压分布特征. 结果表明 …