Effect of angle errors in conical tip buffer rods
Document typeConference report
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Rights accessRestricted access - publisher's policy
Buffer rods are usually plastic or metallic solid cylinders of known acoustic properties, which are placed between the ultrasonic transducer and the sample under study. For some applications, the buffer rod end in contact with the sample under inspection is shaped in a form of a conical tip. If the cone angle is fixed to 45°, the components of the ultrasonic wave reflected at the buffer conical tip are received at the transducer in phase, forming thus a maximum amplitude signal. Otherwise, the components of the ultrasonic wave are received out of phase, composing thus a weaker signal. In this work, the effect of the buffer rod cone angle on the measurement signals has been studied by means of simulations and experiments. The simulations were performed using a two-dimensional finite differences tool and the measurements were conducted with the same operating conditions and buffer rod materials and dimensions than those defined for simulations. The influence of some aspects such as ultrasonic transducer operating frequency and diameter, and buffer rod material has also been analyzed.
CitationGarcía-Álvarez, J., Garcia, M., Chavez-Dominguez, J. A., Turo, A., Salazar, J. Effect of angle errors in conical tip buffer rods. A: IEEE International Ultrasonics Symposium. "2011 IEEE International Ultrasonics Symposium (IUS 2011): Orlando, Florida, USA, October 18-21, 2011". Institute of Electrical and Electronics Engineers (IEEE), 2011, p. 2475-2478.
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