The Calculation Algorithm of the Informative Parameters of the Signal at Implementing the Method of Multiple Reflections

Myshkin, Yu. V., Efremov, A. B.

Abstract. The method of multiple reflections has several important informative parameters of the signal which allow to determine of the presence or the absence of defects in the testing object. Some parameters can be calculated using only numerical methods. In this article, the calculation algorithm of several key informative parameters of the signal is represented such as reflection coefficient on the interface «transducer – testing object», attenuation coefficient, probe pulse amplitude and position. Numerical values of informative parameters of the signal are obtained for pipes with diameter 18, 32, 57 and 73 mm by using developed algorithm and experimental data which are consistent with theoretical data. It is shown that the geometric dimensions of the pipe and the presence of the features such as electric welding seam or foreign inclusions in material of the testing object have a significant impact on the dependencies of informative parameters of the signal from the level of clamping force of piezoelectric transducer on the cylindrical surface of the pipe. The obtained results can be used at the improvement of ultrasonic inspection techniques and development of new approaches in material structure testing of the cylindrical long range objects.

Keywords: reflection coefficient, method of multiple reflections, calculation algorithm, attenuation coefficient, piezoelectric transducer, acoustic wave, clamping force, cylindrical long range objects, distant reflections, guided wave testing

GOST 7.1-2003 citation for works in English:Цитирование по ГОСТ 7.1-2003 для работ на английском языке:
Myshkin, Yu. V., Efremov, A. B. The calculation algorithm of the informative parameters of the signal at implementing the method of multiple reflections // Instrumentation Engineering, Electronics and Telecommunications – 2016 : Proceedings of the II International Forum (Izhevsk, Russia, November 23–25, 2016). – Izhevsk : Publishing House of Kalashnikov ISTU, 2017. – Pp. 63–73.

GOST 7.1-2003 citation for works in Russian:Цитирование по ГОСТ 7.1-2003 для работ на русском языке:
Myshkin, Yu. V., Efremov, A. B. The calculation algorithm of the informative parameters of the signal at implementing the method of multiple reflections // Приборостроение, электроника и телекоммуникации – 2016 : Сб. ст. II Междунар. форума (г. Ижевск, 23–25 ноября 2016 г.). – Ижевск : Изд-во ИжГТУ имени М. Т. Калашникова, 2017. – С. 63–73.

APA v6 сitation:Цитирование в формате APA v6:
Myshkin, Yu. V., & Efremov, A. B. (2017). The calculation algorithm of the informative parameters of the signal at implementing the method of multiple reflections. In Instrumentation Engineering, Electronics and Telecommunications – 2016. Proceedings of the II International Forum (pp. 63–73). Izhevsk, Russia : Publishing House of Kalashnikov ISTU.