Crack Detection Using An Electromagnetic Sensor-Antenna For Structures

Arango, Mauricio Andrés Polochè; Mendez, Héctor Fabián Guarnizo; Pardo, Italo

doi:10.1109/coniiti48476.2019.8960835

Cited by 3 publications

(5 citation statements)

References 12 publications

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“…With this configuration, the crack growth results in a lengthened stub. Most importantly, dissimilar to the designs reported in [7], [8], [9], [10], [11], [12], [13], [14], [15], [16], [17], [18], the crack growth does not result in any structural damages or deformations, which makes sensor reuse possible. Moreover, as demonstrated in Fig.…”

Section: B Tailoring Of Crack Expansion To Stub Extensionmentioning

confidence: 84%

“…In addition, a faster rate of admittance change is observed when the stub length is in the vicinity of multiple odd quarter wavelengths. On the contrary, past approaches [7], [8], [9], [10], [11], [12], [13], [14], [15], [16], [17], [18], which mainly relied on the destruction or deformation of the antenna geometry, result in relatively small resonant frequency deviations.…”

Section: A Stub-loaded Patch Antennamentioning

confidence: 99%

“…N UMEROUS crack-growth monitoring technologies have been proposed and experimentally demonstrated, including piezoelectric transducers [1], [2], [3], fiber-optic sensors [4], [5], and antenna-based wireless sensors [6], [7], [8], [9], [10], [11], [12], [13], [14], [15], [16], [17], [18]. The wired sensing technologies [1], [2], [3], [4], [5] often call for lengthy cable or fiber connections and are costly in terms of system cost, installation, and maintenance.…”

Section: Introductionmentioning

confidence: 99%

“…However, the extended distance is still around a few meters, with a specified alignment between the sensor and the high-gain reader, and the sensing frequency regime is also restricted to the licensed RFID frequency bands, hindering its applications to small crack sensing. As for the sensing scheme, the frequency deviations of the received signals due to sensor structure deformation or destruction were adopted [7], [8], [9], [10], [11], [12], [13], [14], [15], [16], [17], [18]. For instance, the deviations due to a fracture on the ground of a patch antenna was presented in [8], and [15] reported the frequency offsets owing to the patch rupture.…”

Section: Introductionmentioning

confidence: 99%

“…As for the sensing scheme, the frequency deviations of the received signals due to sensor structure deformation or destruction were adopted [7], [8], [9], [10], [11], [12], [13], [14], [15], [16], [17], [18]. For instance, the deviations due to a fracture on the ground of a patch antenna was presented in [8], and [15] reported the frequency offsets owing to the patch rupture. Unfortunately, the reported frequency offset due to small crack growth appears to be relatively small (a few MHz), which might potentially lead to challenging crack-width identification.…”

Section: Introductionmentioning

confidence: 99%

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Stub-Loaded Patch Antenna for Development of High Sensitivity Crack Monitoring Sensor

Chen,

Guo

2024

IEEE J. Sel. Areas Sensors

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This article proposes the use of a wireless sensor developed with a microstrip patch antenna in conjunction with an open-circuited stub for remote, realtime monitoring of crack width expansion. Technically, the open-circuited stub is exploited as a sensing structure with excellent sensitivity, and the crack growth is able to be mechanically mapped to the stub length extension via an incorporation of a mirrored stub structure placed right on top of the open-circuited stub. Thanks to a very strong relationship between the stub input admittance and its electrical length, the operating frequency of the patch is able to be significantly downshifted as the stub is mechanically lengthened (i.e., the crack grows). With the proposed wireless sensing scheme, the crack width expansion can be determined by identifying the dominant frequency component of the sensing signal received at remote data stations in a real-time manner. The sensor operating at 4 GHz was developed for experimental verification and as a demonstration of effectiveness. The experimental results show that the wireless sensor is able to identify the crack expansion of up to 2 mm with a resonant frequency downshift of 110 MHz. Furthermore, the maximum expansion and the finest increment can be simply specified with the sensor operating frequency regime. Moreover, a stable wireless link can be sustained as the patch radiation patterns remain unaffected while crack grows, and the sensor can be reused since the proposed monitoring does not result in any structure destruction or deformation.

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