Abstract
This paper presents the design and implementation of a high-sensitivity eddy current (EC) sensor based on giant magnetoresistance (GMR) to assess cracks in conductive materials. This approach’s originality uses two symmetrical giant magnetoresistance sensors in a differential configuration using commercial GMR elements inserted on a coil in a ferrite pot. The background signal measured by the sensor is infinitesimal if there is no crack in the sample. Therefore, the designed sensor demonstrates a high sensitivity to the presence of cracks where the GMRs mounted in differential allow to reduce the background voltage’s impact. On the other hand, The GMR-based EC probe with a ferrite pot core is more sensitive to the presence of cracks than the conventional EC sensor without a ferrite pot core. This work introduces the notion of the GMR sensor’s effective area (EA) after being calculated and optimized using the inverse problem (particle swarm optimization method). The operation of the differential GMR sensor is validated using a 3D finite element model based on the (A, V–A) formulation and experimental measurements. The prototype of the differential GMR sensor is developed and tested. Experimental results are obtained to evaluate cracks machined on an aluminum standard.
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REFERENCES
Helifa, B., Oulhadj, A., Benbelghit, A., Lefkaier, I.K., Boubenider, F., and Boutassouna, D., Detection and measurement of surface cracks in ferromagnetic materials using eddy current testing, NDT & E Int., 2006, vol. 39, no. 5, pp. 384–390. https://doi.org/10.1016/j.ndteint.2005.11.004
Hamia, R., Cordier, C., and Dolabdjian, C., Separability of multiple deep crack defects with an NDE eddy current system, IEEE Trans. Magn., 2013, vol. 49, no. 1, pp. 124–127. https://doi.org/10.1109/TMAG.2012.2218796
Hamia, R., Cordier, C., Saez, S., and Dolabdjian, C., Eddy-current nondestructive testing using an improved GMR magnetometer and a single wire as inducer: A FEM performance analysis, IEEE Trans. Magn., 2010, vol. 46, no. 10, pp. 3731–3737. https://doi.org/10.1109/TMAG.2010.2052827
Rifai, D., Abdalla, A., Ali, K., and Razali, R., Giant magnetoresistance sensors: A review on structures and non-destructive eddy current testing applications, Sensors, 2016, vol. 16, no. 3, p. 298. https://doi.org/10.3390/s16030298
Postolache, O., Ribeiro, A.L., and Ramos, H.G., GMR array uniform eddy current probe for defect detection in conductive specimens, Measurement, 2013, vol. 46, no. 10, pp. 4369–4378. https://doi.org/10.1016/j.measurement.2013.06.050
Bernieri, A., Ferrigno, L., Laracca, M., and Rasile, A., Eddy current testing probe based on double-coil excitation and GMR sensor, IEEE Trans. Instrum. Meas., 2019, vol. 68, no. 5, pp. 1533–1542. https://doi.org/10.1109/TIM.2018.2890757
Kim, J., Yang, G., Udpa, L., and Udpa, S., Classification of pulsed eddy current GMR data on aircraft structures, NDT & E Int., 2010, vol. 43, no. 2, pp. 141–144. https://doi.org/10.1016/j.ndteint.2009.10.003
Smith, C.H., Eddy-current testing with GMR magnetic sensor arrays, AIP Conf. Proc. (Green Bay, Wisconsin (USA), 2004), vol. 700, pp. 406–413. https://doi.org/10.1063/1.1711651
Zorni, C., Contrôle non destructif par courants de Foucault de milieux ferromagnétiques: de l’expérience au modèle d’interaction, p. 120.
Reimund, V., Pelkner, M., Kreutzbruck, M., and Haueisen, J., Sensitivity analysis of the non-destructive evaluation_of micro-cracks using GMR sensors, NDT & E Int., 2014, vol. 64, pp. 21–29. https://doi.org/10.1016/j.ndteint.2014.02.003
Dogaru, T. and Smith, S.T., Giant magnetoresistance-based eddy-current sensor, IEEE Trans. Magn., 2001, vol. 37, no. 5, pp. 3831–3838. https://doi.org/10.1109/20.952754
Yin, W. et al., Custom edge-element FEM solver and its application to eddy-current simulation of realistic 2M-element human brain phantom: Applications of a custom FEM solver, Bioelectromagnetics, 2018, vol. 39, no. 8, pp. 604–616. https://doi.org/10.1002/bem.22148
Yin, W. et al., An equivalent-effect phenomenon in eddy current non-destructive testing of thin structures, IEEE Access, 2019, vol. 7, pp. 70296–70307. https://doi.org/10.1109/ACCESS.2019.2916980
Lu, M., Peyton, A., and Yin, W., Acceleration of frequency sweeping in eddy-current computation, IEEE Trans. Magn., 2017, vol. 53, no. 7, pp. 1–8. https://doi.org/10.1109/TMAG.2017.2688326
Gao, P., Wang, X., Han, D., and Zhang, Q., Eddy current testing for weld defects with different directions of excitation field of rectangular coil, in 2018 4th Int. Conf. Control Autom. Robotics (ICCAR) (Auckland, April 2018), pp. 486–491. https://doi.org/10.1109/ICCAR.2018.8384725
Ramirez-Pacheco, E.J., Espina-Hernandez, H., Caleyo, F., and Hallen, J.M., Defect detection in aluminium with an eddy currents sensor, in 2010 IEEE Electron. Robotics Automotive Mech. Conf. (Cuernavaca, Mexico, September 2010), pp. 765–770. https://doi.org/10.1109/CERMA.2010.91
Romero-Arismendi, N.O., Pérez-Benítez, J.A., Ramírez-Pacheco, E., and Espina-Hernández, J.H., Design method for a GMR-based eddy current sensor with optimal sensitivity, Sens. Actuators, A, 2020, vol. 314, p. 112348. https://doi.org/10.1016/j.sna.2020.112348
Helifa, B., Féliachi, M., Lefkaier, I.K., Boubenider, F., Zaoui, A., and Lagraa, N., Characterization of surface cracks using eddy current NDT simulation by 3D-FEM and inversion by neural network, Mater. Sci., 2016, vol. 31, no. 2, p. 9.
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Touil, D.R., Lahrech, A.C., Helifa, B. et al. Simulation and Implementation of a High Sensitive Differential Eddy Current Giant Magnetoresistance Probe for Non-Destructive Testing. Russ J Nondestruct Test 58, 833–846 (2022). https://doi.org/10.1134/S1061830922090029
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DOI: https://doi.org/10.1134/S1061830922090029