Measuring interface for an ECT System

• Autorzy: Ramos H. G. , Ribeiro A. L. , Kubjnyi M.

Warianty tytułu

PL

Interfejs pomiarowy w systemie wykorzystującym prądy wirowe

• Języki publikacji: EN

Abstrakty

EN

This paper describes the measuring interface to be included in an automated microcomputer based Eddy Current Testing (ECT) system developed to characterize structural flaws inside electrically conducting nonmagnetic plates. The principle of operation is based on the measurement of the output voltages of two sensing coils. A description of the implemented prototype using two different types of probes including the digital signal processing used to overcome the signal degradation is presented. The application of a 2D Finite Element Method (FEM) allows to preview the range of the resulting output voltages in the detection coils and also the excitation current amplitude necessary to obtain a given signal to noise ratio. The experimental results obtained with the two probes are presented and one may conclude by inspection that the quality of the obtained data and the amount of information required for future structural defects characterization depend greatly on the probe geometry.

PL

W artykule opisano interfejs stosowany w mikrokomputerowym systemie pomiarowym wykorzystującym prądy wirowe. System służy do badania materiałów niemagnetycznych. Do pomiaru służą dwie cewki otaczające próbkę. Badania eksperymentalne potwierdziły że jakość badania struktury silnie zależy od geometrii próbki.

Słowa kluczowe

EN

electromagnetic nondestructive testing; finite element method; eddy currents; inductive sensors; electrical technology

PL

badania nieniszczące; prądy wirowe; elektrotechnika

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Przegląd Elektrotechniczny
• Rocznik: 2011
• Tom: R. 87, nr 7
• Strony: 266--271
• Opis fizyczny: Bibliogr. 10 poz., rys., tab., wykr.

Twórcy

autor

Ramos H. G.

autor

Ribeiro A. L.

autor

Kubjnyi M.

• Instituto de Telecomunicacoes, IST, Lisboa, Portugal,

Bibliografia

• [1] T. Sollier, D. Prémel, D. Lesselier, editors, Electromagnetic Nondestructive Evaluation (VIII), Studies in Applied Electromagnetics and Mechanics 24, IOS Press, 2004.
• [2] Paul McIntire, Electromagnetic Testing: Eddy Current, Flux Leakage and Microwave Nondestructive Testing (Nondestructtive Testing Handbook, Vol.4), American Society for Nondestructive Testing, 1986.
• [3] P. Gaydecki, I. Silva, B. T. Fernandes, Z. Z. Yu, A portable inductive scanning system for image steel-reinforcing bars embedded within concrete, Sensors and Actuators, vol. 84, pp. 25-32, 2000.
• [4] G. Miller et al., A combined Q and heterodyne sensor incorporating real-time DSP for reinforcement imaging, corrosion detection and material characterization, Sensors and Actuators A, vol. 121, pp. 339-346, 2005.
• [5] A. Lopes Ribeiro, H. Geirinhas Ramos, Inductive Probe for Flaw Detection in non-Magnetic Metallic Plates Using Eddy Currents, Proc. I2MTC-IEEE International Instrumentation and Measurement Technology Conference, Victoria, Canada, pp.1447-1453, 12-15 May, 2008.
• [6] H. M. Geirinhas Ramos, A. Lopes Ribeiro, P. Ježdík and J. Neškudla, Eddy Current Testing of Conductive Materials, Proc. I2MTC-IEEE International Instrumentation and Measurement Technology Conference, Victoria, Canada, pp.964-970, 12-15 May, 2008.
• [7] S. Sharma, L. Udpa, Y. Sun, S. Upda, A modified differential pickup reflection probe, Review of Progress in Non Destructive Evaluation, Vol. 17, 1998.
• [8] Pedro M. Ramos, Fonseca da Silva and A. Cruz Serra, Improving sine-fitting algorithms for amplitude and phase measurements, XVII IMEKO World Congress, Dubrovnik, Croatia, pp. 614-619, June 2003.
• [9] P. Jezdik, J. Neskudla, H. M. Geirinhas Ramos, A. Lopes Ribeiro, Classification of Typical Mechanical Cracks in Aircraft Materials Using ECT, ISEF 2007, Prague, Czeck Republic, 2007.
• [10] O. Bíró, K. Preis, On the Use of the Magnetic Vector Potential in the Finite Element Analysis of Three-Dimensional Eddy Currents, IEEE Transactions on Magnetics, Vol.25, N.4, pp.3145-3159.