Temperature Compensation Methods for Elastic Wave Based SHM

The introduction to Structural Health Monitoring system based on anomalies of propagating elastic waves was presented. It was underlined that in spite of great potential for on-line inspection of structures by array of piezoelectric sensors some challenges arise. The main problem is that anomalies of registered signals of propagating waves come not only from defects but are also caused by temperature changes. In order to tackle this problem strategy for compensation of the temperature effect was developed. In comparison to other available compensation methods, the proposed Equivalent Wave Method is operating in frequency domain and utilises Rayleigh–Lamb thermal coefficient. The method was validated experimentally by using array of piezoelectric sensors and scanning laser vibrometer. It was shown that the proposed signal processing improved considerably damage localisation capabilities.

[1]  Keith Worden,et al.  An introduction to structural health monitoring , 2007, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences.

[2]  V. Giurgiutiu.  Tuned Lamb Wave Excitation and Detection with Piezoelectric Wafer Active Sensors for Structural Health Monitoring , 2005 .

[3]  Giovanni Maria Carlomagno,et al.  Nondestructive evaluation of carbon fibre reinforced composites with infrared thermography and ultrasonics , 2015 .

[4]  Wieslaw Ostachowicz,et al.  Damage detection in composite plates with embedded PZT transducers , 2008 .

[5]  D. Meredith,et al.  Rounding off the cow: Challenges and successes in an interdisciplinary physics course for life science students , 2012 .

[6]  Philippe Duvauchelle,et al.  Optimisation of the process of X-ray tomography applied to the detection of defects in composites materials , 2015 .

[7]  Sybil P. Parker,et al.  McGraw-Hill dictionary of scientific and technical terms , 1976 .

[8]  Z. Su,et al.  Identification of Damage Using Lamb Waves , 2009 .

[9]  Wieslaw J. Staszewski,et al.  Health Monitoring Of Aerospace Structures: Smart Sensor Technologies And Signal Processing , 2017 .

[10]  Wieslaw Ostachowicz,et al.  Damage localisation in plate-like structures based on PZT sensors , 2009 .

[11]  Paul D. Wilcox,et al.  Strategies for guided-wave structural health monitoring , 2007, Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences.

[12]  Salvatore Salamone,et al.  Numerical prediction and experimental verification of temperature effect on plate waves generated and received by piezoceramic sensors , 2012 .

[13]  S. Salamone,et al.  Temperature effects in ultrasonic Lamb wave structural health monitoring systems. , 2008, The Journal of the Acoustical Society of America.

[14]  Alexandre Locquet,et al.  Enhanced Terahertz Imaging of Small Forced Delamination in Woven Glass Fibre-reinforced Composites with Wavelet De-noising , 2016 .

[15]  Andreas Nocke,et al.  Review on quality assurance along the CFRP value chain – Non-destructive testing of fabrics, preforms and CFRP by HF radio wave techniques , 2015 .

[16]  Paul D. Wilcox,et al.  The temperature stability of guided wave structural health monitoring systems , 2006 .

[17]  T. Michaels,et al.  Guided wave signal processing and image fusion for in situ damage localization in plates , 2007 .

[18]  Jochen Moll,et al.  Efficient temperature compensation strategies for guided wave structural health monitoring. , 2010, Ultrasonics.

[19]  A. Locquet,et al.  Nondestructive evaluation of forced delamination in glass fiber-reinforced composites by terahertz and ultrasonic waves , 2015 .

[20]  Rune Brincker,et al.  Vibration Based Inspection of Civil Engineering Structures , 1993 .

[21]  Xinlin Qing,et al.  SMART Layer and SMART Suitcase for structural health monitoring applications , 2001, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[22]  J. Michaels,et al.  A methodology for structural health monitoring with diffuse ultrasonic waves in the presence of temperature variations. , 2005, Ultrasonics.

[23]  H. Lamb.  On waves in an elastic plate , 1917 .