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A residual thickness measurement method for corroded steel plates using ultrasonic waves is presented. In this method, a shear-horizontal (SH) plate wave is transmitted in a steel plate by an SH array transducer, and the echo received by the reflection occurring owing to the cut-off phenomena of the plate wave is utilized. Furthermore, the configuration of the SH array transducer suitable for the...
In manufacturing industries, inspection process is the most vital process in production line in order to certify the quality of the product. At the end of every production line, there would be one quality assurance section to do the inspection. Sometimes quality inspection is not just needed at the end of the production line, it is also needed at specific area or at the process where usually problem...
Study of the possibility of wave phase conjugation (WPC) technology for ultrasonic testing of objects in gas medium and for velocimetry of air microflows is the objective of the present work. The main problem to design parametric phase conjugate wave (PCW) generator (conjugator) working in air is connected to the huge loss of power of the ultrasonic wave when passing the interface between air and...
To optimize the ultrasonic transducer parameters and to interpret the measured results, knowledge about the sound field is required. In ultrasonic testing, the transducer generated sound field often has to pass different layers until it reaches the object to be tested. The interfaces of these layers may be curved and the active element of the transducer has a finite aperture. This paper gives an...
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