Active Microwave Thermography to Detect and Locate Water Ingress

Mirala, Ali; Foudazi, Ali; Ghasr, Mohammad Tayeb; Donnell, Kristen M.

doi:10.1109/tim.2020.3003394

Cited by 16 publications

(13 citation statements)

References 30 publications

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“…In [20]- [22], a millimeter-wave active radiometer based on transmission measurement is used to detect and measure the delamination in GFRP. In the active thermographic method reported in [23], [24], the GFRP sample is illuminated with a waveguide and the differential temperature change is detected using a thermal camera. Furthermore, several microwave thermography techniques are recently reviewed for inspection of various composite structures in [25], [26].…”

Section: Several Microwave Ndt Techniques Have Been Reported For Undementioning

confidence: 99%

Microwave Nondestructive Testing for Defect Detection in Composites Based on K-Means Clustering Algorithm

et al. 2021

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Section: Several Microwave Ndt Techniques Have Been Reported For Undementioning

confidence: 99%

Microwave Nondestructive Testing for Defect Detection in Composites Based on K-Means Clustering Algorithm

et al. 2021

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“…Following the application of thermal energy, the surface thermal profile of the SUT in question is viewed using an infrared (IR) or thermal camera. These active sources include flash lamp [2], laser [3], induction [4], ultrasound transducers [5], and more recently, a microwavebased excitation [6]- [9].…”

Section: Introductionmentioning

confidence: 99%

“…In the case of a microwave-based excitation, the thermal excitation is (primarily) generated through electromagnetic energy that is absorbed into dielectric materials. This approach will herein be referred to as active microwave thermography (AMT) [6]- [9]. AMT is a relatively new NDT&E technique that has been successfully applied for inspection of a variety of infrastructure and aerospace-related needs [6]- [9].…”

Section: Introductionmentioning

confidence: 99%

“…This approach will herein be referred to as active microwave thermography (AMT) [6]- [9]. AMT is a relatively new NDT&E technique that has been successfully applied for inspection of a variety of infrastructure and aerospace-related needs [6]- [9]. Utilizing a microwave-based excitation offers a unique way to accomplish a thermographic inspection in that the thermal excitation can be tailored to the inspection need via electromagnetic parameters such as frequency and polarization.…”

Section: Introductionmentioning

confidence: 99%

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Pulsed-Active Microwave Thermography

Wilcox

Bonmarin

Donnell

2022

2022 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)

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Active microwave thermography (AMT) is a thermographic nondestructive testing and evaluation technique that utilizes an electromagnetic-based excitation with a subsequent infrared measurement of the surface thermal profile of the material or structure of interest. AMT has been successfully applied to several aerospace and civil infrastructure applications. This work seeks to expand the performance of AMT by incorporating a signal processing technique common to traditional (flash-lamp) thermography, referred to as pulsed thermography (PT). PT operates on the premise of a pulsed excitation, as opposed to a constant or step excitation (ST) over a given time-period that is typical to traditional active thermography. This work applies the pulsed approach to AMT, herein referred to as P-AMT, and compares the thermal contrast (TC) and signal-to-noise ratio (SNR) of traditional and pulsed AMT inspections as applied to a moisture ingress detection need. The results suggest that the optimal heating time (indicated through SNR) for P-AMT is less than that of traditional AMT with a reduced overall (absolute) temperature. This is important as it relates to any inspection with concerns for thermal damage as well an overall reduction in required inspection time.

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“…The source employed to generate the thermal stimulation depends on the sample under investigation. To localize water ingress for example, microwaves are particularly suited [6,7], whereas eddy currents will be more appropriate to detect cracks in metallic materials [8]. We demonstrated that active thermal imaging is a promising tool for engineered NPs [9][10][11][12][13][14].…”

mentioning

confidence: 99%

Using Lock-In Thermography to Investigate Stimuli-Responsive Nanoparticles in Complex Environments

Bonmarin

Steinmetz

Spano

et al. 2021

IEEE Instrum. Meas. Mag.

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The use of nanoparticles (NP) has been dramatically rising in the recent years and NPs can nowadays be found in various products ranging from food to composite materials or cosmetics [1,2]. Currently, the most frequently employed NP types are titania (TiO2), as a typical color additive, silica (SiO2), as anticoagulation agent, and silver (Ag) NPs, which are added to textiles, due to their antimicrobial properties. Because of their outstanding physical and mechanical properties carbon-containing nanomaterials, such as graphene and carbon nanotubes, have also experienced a surge in industrially relevant applications. About 30 % of the NPs are suspended in liquids, ranging from water to creams and lotions to car lubricants, followed by applications containing surface-bound (e.g., in textiles) NPs and finally nanocomposites (e.g., polymer-CNT composites). Together with biological and physiological fluids, these matrices render the detection and quantification of NPs fairly complex [3]. The broad range of chemical and biological compositions of these environments, including pH and ionic strength are often detrimental to the colloidal stability of NPs, potentially causing aggregation or even dissolution effects and therefore render NP analysis fairly challenging.Man-made, so-called 'engineered' NPs can be precisely tailored with respect to specific and desired properties. These materials are often stimuli-responsive meaning that they demonstrate the ability to generate heat upon a stimulus: alternating magnetic fields (AMF) for magnetic particles like superparamagnetic iron oxide NPs (SPIONs), and light in the UV, visible or NIR range for plasmonic NPs like gold spheres and other photothermal particles. Such a behavior

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Active Microwave Thermography to Detect and Locate Water Ingress

Cited by 16 publications

References 30 publications

Microwave Nondestructive Testing for Defect Detection in Composites Based on K-Means Clustering Algorithm

Microwave Nondestructive Testing for Defect Detection in Composites Based on K-Means Clustering Algorithm

Pulsed-Active Microwave Thermography

Using Lock-In Thermography to Investigate Stimuli-Responsive Nanoparticles in Complex Environments

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