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Fedorov, Maksim B.
- The use of Phase-Shift Keyed Signals to Increase Thickness Measurement Accuracy of Large-Sized Products Made of Polymeric Composite Materials
Abstract Views :161 |
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Authors
Affiliations
1 National Research University, Moscow Power Engineering Institute,Electrical Engineering Faculty, Moscow, RU
1 National Research University, Moscow Power Engineering Institute,Electrical Engineering Faculty, Moscow, RU
Source
Indian Journal of Science and Technology, Vol 8, No 29 (2015), Pagination: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 signal time delay by the maximum of compressed PSK pulse. 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- The use of Complex-Modulated Signals at US Testing of Extended Complex-Structured Products
Abstract Views :169 |
PDF Views:0
Authors
Vladimir K. Kachanov
1,
Igor V. Sokolov
1,
Alexey A. Sinitsyn
1,
Maksim B. Fedorov
1,
Michael A. Karavaev
1,
Roman V. Kontsov
1
Affiliations
1 National Research University, Moscow Power Engineering Institute, Electrical Engineering Faculty, Moscow, RU
1 National Research University, Moscow Power Engineering Institute, Electrical Engineering Faculty, Moscow, RU
Source
Indian Journal of Science and Technology, Vol 8, No 29 (2015), Pagination:Abstract
The results of analysis of the possibilities to use Complex-Modulated radio pulses as probing signals in US flaw detection are given. It is shown that the application of Complex-Modulated echo signals in the receiving path optimal filters improves the basic parameters of the echo control method – sensitivity and resolution capability, and, in presence of white noise and not correlated interference, generally increases the reliability of the testing method.Keywords
Complex-Modulated Signals, Electro acoustic Pickup, Frequency-Modulated Pulse, Optimal Filtering, Phase- Shift Keyed Signal, US Flaw Detection- The use of Synchronous Detection in Ultrasonic Flaw Detection of Large -Sized Products with Large Integral Attenuation of Signals
Abstract Views :138 |
PDF Views:0
Authors
Vladimir K. Kachanov
1,
Igor V. Sokolov
1,
Alexey A. Sinitsyn
1,
Maksim B. Fedorov
1,
Michael A. Karavaev
1
Affiliations
1 Moscow Power Engineering Institute (National Research University), Russia
1 Moscow Power Engineering Institute (National Research University), Russia