Nondestructive Testing of Hollowing Deterioration of the Yungang Grottoes Based on THz-TDS

Researchers have developed a reliable, nondestructive method to measure hollowing deterioration in the Yungang Grottoes using terahertz time-domain spectroscopy (THz-TDS). The study established a model correlating hollowing thickness with time differences in THz spectra, achieving an R-squared value of 0.99795, indicating high accuracy. This approach enables both qualitative and quantitative assessment of deterioration without damaging the stone relics, offering significant implications for their preservation and repair. The method's simplicity and effectiveness make it valuable for similar heritage sites.

Feng, J., Meng, T., Lu, Y., Ren, J., Zhao, G., Liu, H., Yang, J., & Huang, R. (2020). Nondestructive Testing of Hollowing Deterioration of the Yungang Grottoes Based on THz-TDS. Electronics, 9(4), 625. https://doi.org/10.3390/electronics9040625