Ultrasonic sensors measure the distance between a target and the sensor using high-frequency sound waves that are inaudible to humans. The process is simple: the sensor emits ultrasonic waves, which ...

Gas-Coupled Laser Acoustic Detection (GCLAD) is an ultrasonic, non-contact detection technique that has been recently proven to be applicable to the inspection of mechanical components. GCLAD response ...

To avoid severe threats to the safety of people’s lives and property caused by the ultimate collapsing of damaged concrete hydraulic structures and to overcome the technical bottleneck related to the ...