Comparison of image analysis methods on the example of ultrasonic thermography of an aramid composite

• Autorzy: Świderski Waldemar

Identyfikatory

DOI

10.2478/kones-2019-0043

• Języki publikacji: EN

Abstrakty

EN

Infrared thermography using ultrasound thermal excitation of the tested material is one of the most effective methods in non-destructive testing of a multi-layer aramid composite. This type of material is very popular in the construction of light ballistic armours. Typical defects are delamination between layers of aramid fabric joined by resin. They are usually filled with air. Delamination located deep under the surface of the test generates very weak temperature signals. They are often at the level of noise. To reduce the impact of noise on the detection of a defect, special methods of image analysis (thermograms) are used. Such methods include principal component analysis and wavelet analysis. Principal Component Analysis is a relatively new procedure of statistical data treatment, which is becoming increasingly popular in non-destructive testing. Mathematically, it is often regarded as implementation of the so-called singular values decomposition technique, which allows extracting of spatial information from a matrix of source data. The wavelet analysis is an integral transform, which represents the convolution of an analysed process with a special mother function called wavelet. Wavelets are characterized by two parameters: scale and shift. The paper presents a comparison of the efficacy of these methods in the detection of defects in the multilayer composite reinforced aramid fibre.

Słowa kluczowe

EN

non-destructive testing; composite material; IR thermography; image analysis

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2019
• Tom: Vol. 26, No. 2
• Strony: 145--150
• Opis fizyczny: Bibliogr. 5 poz., rys.

Twórcy

autor

Świderski Waldemar

• Military Institute of Armament Technology Wyszyńskiego Street 7,05-220 Zielonka, Poland tel.: [phone], fax: [phone]

Bibliografia

• [1] Swiderski, W., Hłosta, P., Non-Destructive Evaluation of Impacted CFRP by IR Thermography, Materials, Vol. 12 (6), 2019.
• [2] Swiderski, W., Non-destructive testing of light armours of CFRP after ballistic impacts by IR thermography methods, Composite Structures, Vol. 224, 2019.
• [3] ThermoFit Pro Operation Manual, Innovation Ltd., 2016.
• [4] Rajic, N., Principal Component Thermography, In Defence Science & Technology, Airframes and Engines Division Aeronautical and Maritime Research Laboratory: Fairbairn, Australia, Canberra 2002.
• [5] Galmiche, F., Vallerand, S., Maldague, X., Wavelet transform applied to pulsed phase thermography, Proceedings of V-th Workshop on Advances in Infrared Technology and Applications, CNR, pp. 117-122, Venice 1999.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).