Wanli Tu, Shuncong Zhong
https://www.springerprofessional.de/en/simulation-and-experiment-of-terahertz-wave-detection-of-marine-/15181602
Terahertz detection of multilayer marine protective coatings on a steel substrate using terahertz pulsed imaging (TPI) system in reflection mode was investigated. The multilayered anticorrosive/antifouling paint on steel substrate with different coating structures were produced as experimental samples for terahertz wave detection. The modeling and numerical simulation to calculate the propagation of THz radiation from marine protective coatings was studied by the finite difference time domain (FDTD) method. The reflected radiation properties in both simulation and experimentation were recorded for further analysis, such as the identification of the defect beneath coating. The results showed that it was able to provide much more detailed information on the position of the defect beneath the coating, such as detachment of large areas where adhesion has failed, or the blistering defect beneath the coating. Therefore, the developed model combined with the experimental analysis was effective and feasible for the detection and structure characterization of marine protective coatings and will provide timely and reliable information for ship maintenance work.
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