基于太赫兹-红外融合技术的城墙修复效果评估

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Abstract： To scientifically evaluate the restoration performance ancient city walls， time-domain spectroscopy （THz-TDS） infrared thermal imaging technology were applied to assess the Desheng Fortress（Ming Dynasty）. Three representative sections were examined： adobe brick masonry repaired （Area 1）， well-preserved original （Area 2）， layer-by-layer ramming repaired （Area 3）. THz spectral data revealed significant differences between Area 1 （time delay： 3.72 ps; refractive index： 2.224） Area 2 （time delay： 3.02 ps; refractive index： 2.107），while Area 3 （time delay： 3.12 ps; refractive index： 2.098） demonstrated nearly identical THz spectral data to Area 2. Infrared thermal imaging also showed that the Area 3 restored by layer-by-layer ramming exhibited greater uniformity with fewer instances cracks， capilary phenomena， or biological diseases.The proposed point-surface integrated evaluation methodology synergistically combines infrared thermography mapping heritage surfaces with THz spectral datasets acquired through in-situ micro-sampling， enabling quantitative restoration assessment providing a novel approach for scientifically validating traditional conservation techniques.

words： nondestructive testing; cultural relic restoration; performance evaluation; high sensitivity

摘要：为了对古城墙修复性能进行科学评估，本研究以明代得胜堡长城为对象，采用太赫兹时域光谱（THz-TDS）与红外热成像技术对其土坏砖垒砌法修复段（1区）、保存完好段（2区）和逐层夯筑法修复段（3区）进行检测分析。（剩余37757字）