The Use of Phase-Shift Keyed Signals to Increase Thickness Measurement Accuracy of Large-Sized Products Made of Polymeric Composite Materials

Vladimir K  Kachanov; Igor V  Sokolov; Alexey A  Sinitsyn  and Maksim B  Fedorov

doi:10.17485/ijst/2015/v8i29/86854

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The Use of Phase-Shift Keyed Signals to Increase Thickness Measurement Accuracy of Large-Sized Products Made of Polymeric Composite Materials

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Indian Journal of Science and Technology

DOI: 10.17485/ijst/2015/v8i29/86854

Year: 2015, Volume: 8, Issue: 29, Pages: 1-4

Original Article

The Use of Phase-Shift Keyed Signals to Increase Thickness Measurement Accuracy of Large-Sized Products Made of Polymeric Composite Materials

Vladimir K. Kachanov, Igor V. Sokolov, Alexey A. Sinitsyn^* and Maksim B. Fedorov

National Research University, Moscow Power Engineering Institute, Electrical Engineering Faculty, Moscow, Russian Federation; [email protected]

This work is licensed under a Creative Commons Attribution 4.0 International License.

Abstract

It is shown that to improve the accuracy of Ultrasonic (US) thickness measurements of the large-sized products made of polymeric composite materials it is required to use Phase-Shift Keyed (PSK) Signals, known from Radio Engineering, and to determine echo signaltime delay by the maximum of compressed PSKpulse.In order to improve the measurement accuracy US PSK Huffman encoding signals (M-signals) should be used in the continuous repetition mode, providing simultaneously high measurement accuracy and the greatest possible control sensitivity for a given period of repetition of probing pulses.
Keywords: Phase-Shift Keyed Signals, Polymeric Composite Materials, Measurement Accuracy, Ultrasonic Thickness Measurement