The ultrasonic wave is applied as an inspection method for the gas-holder and the pipeline in service. In such an inspection, the application of an automatic inspection system is desirable, because a manual inspection is difficult to accomplish perfectly and exactly due to its enormity, a so-called nondestructive inspection robot is then preferable. However, an ultrasonic nondestructive inspect...

Ultrasonic standing wave atomization (USWA) can obtain micron-sized spherical droplets from high viscosity or surface energy liquids, which mainly depend on the high-energy density of a sound field. In this paper, formation an ultrasonic field be generated by vibration tool head driven magnetostrictive transmitters. Based simulation environment Comsol Multiphysics software, numerical study abou...

In this paper we describe an ultrasonic inspection system used for detection of surface defects in food cans. The system operates in pulse-echo mode and analyzes the 220 kHz ultrasonic signal backscattered by the object. The classification of samples into valid or defective is achieved with χ statistics and the k-nearest neighbour method, applied to features computed from the envelope of the ul...

In order to achieve remote control of ultrasonic measurement system, an infrared communication-based ultrasonic measurement system is developed combining wireless communication technology with ultrasonic measurement technology. The hardware circuits of entire system and the achievement of several key technologies are discussed, including transducer structure and parameters selection, design of ...

This paper proposes a novel flexible piezoelectric micro-machined ultrasound transducer, which is based on PZT and a polyimide substrate. The transducer is made on the polyimide substrate and packaged with medical polydimethylsiloxane. Instead of etching the PZT ceramic, this paper proposes a method of putting diced PZT blocks into holes on the polyimide which are pre-etched. The device works i...