Detection of Cracks under Cover and Corrosion using UHF Probe

Rahman, Mohammed Saif ur; Mustapha, Ademola Akeem; Abou‐Khousa, Mohamed A.

doi:10.1109/i2mtc48687.2022.9806572

Cited by 3 publications

(6 citation statements)

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“…Open-resonators employ inefficient EM radiating elements designed to concentrate the field in the proximity of the main radiating structure to increase the sensitivity and resolution [67], [68], [69], [70], [71], [72], [73], [74], [75], [76], [77], [78], [79], [80], [81], [82]. These methods were successfully demonstrated to detect 8-and 2-µm-wide fatigue cracks in steel in 1973 [67] and 1975 [68].…”

Section: Resonator Methodsmentioning

confidence: 99%

“…To improve upon the abovementioned limitations, the planar resonant probe shown in Fig. 14(a) was introduced recently [76], [77], [78], [80], [81]. This one-port probe is based on a small loop loaded with a spiral resonator (SR) and can be operated at multiple resonant frequencies (modes) below 1 GHz (e.g., 500-800 MHz), in the ultrahigh frequency (UHF) band [76], [77], [81].…”

Section: Resonator Methodsmentioning

confidence: 99%

“…14(a) was introduced recently [76], [77], [78], [80], [81]. This one-port probe is based on a small loop loaded with a spiral resonator (SR) and can be operated at multiple resonant frequencies (modes) below 1 GHz (e.g., 500-800 MHz), in the ultrahigh frequency (UHF) band [76], [77], [81]. Therefore, it operates at a lower frequency than all other resonant probes developed for crack detection thus far.…”

Section: Resonator Methodsmentioning

confidence: 99%

“…Unlike the previously developed resonant probes, this probe was demonstrated to detect arbitrarily oriented exposed and covered cracks under insulation at lift-offs up to a few millimeters [77], [81]. The UHF probe intrinsically yields a crack indication which is fairly independent of the relative orientation between the crack and probe [77].…”

Section: Resonator Methodsmentioning

confidence: 99%

“…The UHF probe was also recently demonstrated to detect narrow notches covered under various dielectric materials [81]. It was used to image the notch sample reported in Fig.…”

Section: Resonator Methodsmentioning

confidence: 99%

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Detection of Surface Cracks in Metals Using Microwave and Millimeter-Wave Nondestructive Testing Techniques—A Review

Abou‐Khousa

Rahman

Donnell

et al. 2023

IEEE Trans. Instrum. Meas.

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Integrity assessment of metallic structures requires inspection tools capable of detecting and evaluating cracks reliably. To this end, many microwave and millimeter-wave nondestructive testing and evaluation (NDT&E) methods have been developed and applied successfully in the past. Detection of fatigue cracks with widths less than 5 µm using noncontact microwave-based inspection methods was demonstrated in the 1970s. Since their introduction, these methods have evolved considerably toward enhancing the detection sensitivity and resolution. Undertaking key application challenges has attracted considerable attention in the past three decades and led to the development of the near-field techniques for crack detection. To address a need that cannot be fulfilled by other NDT&E modalities, innovative noncontact microwave and millimeter-wave NDT&E methods were devised recently to detect cracks of arbitrary orientations under thick dielectric structures. While the reported methods share the same underlying physical principles, they vary considerably in terms of the devised probes/sensors and the application procedure. Consequently, their sensitivity and resolution as well as their limitations vary. This article reviews the various crack detection methods developed to-date and compares them in terms of common performance metrics. This comprehensive review is augmented with experimental comparisons and benchmarking aimed to benefit NDT&E practitioners and researchers alike.

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Section: Resonator Methodsmentioning

confidence: 99%

Section: Resonator Methodsmentioning

confidence: 99%

Section: Resonator Methodsmentioning

confidence: 99%

Section: Resonator Methodsmentioning

confidence: 99%

“…The UHF probe was also recently demonstrated to detect narrow notches covered under various dielectric materials [81]. It was used to image the notch sample reported in Fig.…”

Section: Resonator Methodsmentioning

confidence: 99%

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