Optimization of NDE Characterization Parameters for a RF-SQUID Based System Using FEM Analysis

Fardmanesh, Mehdi; Sarreshtedari, Farrokh; Pourhashemi, A.; Ansari, E.; Vesaghi, M. A.; Schubert, J.; Banzet, M.; Krause, Hans‐Joachim

doi:10.1109/tasc.2009.2018739

Cited by 17 publications

(7 citation statements)

References 11 publications

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“…13 and 14 show the experimental scanning of a single hole in an aluminum plate and its counterpart simulation using the same frequency of 40 Hz. The system parameters for experimental measurements are set according to the optimization results in [3]. In that reference, the comparison between the FEM simulations and the experimental measurements is also presented.…”

Section: Resultsmentioning

confidence: 99%

“…In [3], we used our new models in the finite-element method (FEM) simulation of the system for optimization of different eddy current superconductive quantum interface device (SQUID) NDE system parameters with little emphasis on the selection of such models. In that work, it is stated that incorporating the FEM algorithm for the exact modeling of small flaws and cracks needs tremendous number of mesh elements and a great deal of computer resources.…”

Section: Introductionmentioning

confidence: 99%

“…For the experimental setup, we have implemented a SQUID NDE system based on a first-order RF-SQUID gradiometer as the magnetic sensor, a planar double-D coil [8] that is made on a two-layer printed circuit board as the excitation source, a micropositioner for precise x, y, and θ adjustments of the excitation coil, and liquid nitrogen cryogenic systems, and also required lock-in detection equipment for phase-sensitive measurements. The detail of the measurement setup is explained in [3] and [9]. simulations and is also physically implemented for the experimental measurements.…”

Section: Introductionmentioning

confidence: 99%

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An Efficient Finite-Element Approach for the Modeling of Planar Double-D Excitation Coils and Flaws in SQUID NDE Systems

Sarreshtedari

Pourhashemi

Asad

et al. 2010

IEEE Trans. Appl. Supercond.

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Incorporating an efficient approach for the finiteelement simulation of eddy current superconductive quantum interface device (SQUID) nondestructive evaluation (NDE) systems, an appropriate finite-element method (FEM) has been presented for simulating and analyzing such systems. We have introduced a new model for the planar double-D coils, which are used as the excitation source in eddy current SQUID NDE systems, and also another model for the description of the flaw effect on the induced current. We have also examined our simulation results with their associated measurements. Our system is based on a high-T C YBCO gradiometer RF-SQUID sensor with a flux noise level below 100 μΦ 0 / √ Hz at 100 Hz in an unshielded environment while being shielded against external RF electromagnetic interference. The very good agreement between experimental and numerical approaches confirmed our model for the 3-D FEM simulation of the system, which is being done in reasonable time and using reasonable computer resources.Index Terms-Double-D modeling, finite element, flaw modeling, RF superconductive quantum interface device (SQUID) gradiometer, SQUID nondestructive evaluation (NDE).

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An Efficient Finite-Element Approach for the Modeling of Planar Double-D Excitation Coils and Flaws in SQUID NDE Systems

Sarreshtedari

Pourhashemi

Asad

et al. 2010

IEEE Trans. Appl. Supercond.

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“…Furthermore there are many different numerical modelling methods for magnetic modelling of such problems. These modelling tools are being used for optimization of NDE systems [2] and also for yielding expected signal from different flaw types [3]. In ref [2], we have reported the development of an efficient Finite Element Method for modelling of hole-flaws in metallic samples.…”

Section: Introductionmentioning

confidence: 99%

“…These modelling tools are being used for optimization of NDE systems [2] and also for yielding expected signal from different flaw types [3]. In ref [2], we have reported the development of an efficient Finite Element Method for modelling of hole-flaws in metallic samples. The acceptable conformity between the FEM simulation and experimental SQUID NDE results of that work is used here for defining a frequency domain noise cancelation filter in order to enhance the signal processing algorithms for the image restoration.…”

Section: Introductionmentioning

confidence: 99%

FEM enhanced signal processing approach for pattern recognition in the SQUID based NDE system

Sarreshtedari

Jahed

Hosseni

et al. 2010

J. Phys.: Conf. Ser.

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Abstract. An efficient Non-Destructive Evaluation algorithm has been developed in order to extract the required information for pattern recognition of defects in the conductive samples. Using high-Tc gradiometer RF-SQUIDs in unshielded environments and incorporating an automated two dimensional non-magnetic scanning robot, samples with different intentional defects have been tested. We have used a developed noise cancellation approach for the improvement of the effectiveness of the used inverse-problem technique. In this approach we have used a well examined Finite Element Method (FEM) to apply a noise reduction filtering on the obtained raw magnetic image data before incorporating the signal processing analysis. By applying this noise cancellation filter and incorporating three different signal processing algorithms and comparing the results of the predicted images by the pattern of the intentionally made defects, we have investigated the ability of these methods for pattern recognition of unknown defects.

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An Efficient SQUID NDE Defect Detection Approach by Using an Adaptive Finite-Element Modeling

Sarreshtedari

Razmkhah

Hosseini

et al. 2010

J Supercond Nov Magn

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Optimization of NDE Characterization Parameters for a RF-SQUID Based System Using FEM Analysis

Cited by 17 publications

References 11 publications

An Efficient Finite-Element Approach for the Modeling of Planar Double-D Excitation Coils and Flaws in SQUID NDE Systems

An Efficient Finite-Element Approach for the Modeling of Planar Double-D Excitation Coils and Flaws in SQUID NDE Systems

FEM enhanced signal processing approach for pattern recognition in the SQUID based NDE system

An Efficient SQUID NDE Defect Detection Approach by Using an Adaptive Finite-Element Modeling

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