标题： 使用低频超声技术量化隔热玻璃单元中的氩气浓度 显示英文标题

标题： Quantifying Argon Concentration within Insulating Glass Units using Low Frequency Ultrasonic Technique

摘要： 中空玻璃单元（IGUs）占建筑围护结构热传导损失的30%以上。 为了减轻这一问题，中空玻璃单元通常填充低导热性气体，如氩气。 然而，由于中空玻璃单元的老化和制造过程，氩气浓度会随时间减少，从而降低其隔热效果。 本研究提出了一种新的无损方法，利用超声技术来量化中空玻璃单元中的氩气浓度。 通过实验测量和使用COMSOL Multiphysics的数值模型验证，超声能量通过中空玻璃单元与氩气浓度相关。 模型通过调整气体密度来模拟声-结构相互作用，以反映氩气的存在，显示出随着氩气浓度的增加，超声能量也增加。 对两个中空玻璃单元样品进行的实验测量显示，二十种氩气-空气混合物（氩气含量从100%到25%）的测量结果表明，所提出的超声技术的平均绝对误差为0.13，优于火花发射光谱法和Helantec ISO-GAS-Control，它们的误差分别为2.31和0.33。 显示英文摘要

摘要： Insulating glass units (IGUs) account for over 30% of thermal transmission losses in building envelopes. To mitigate this, IGUs are often filled with low-conductivity gases like Argon. However, Argon concentration decreases over time due to IGU aging and manufacturing processes, which lessens their insulating effectiveness. This study presents a novel nondestructive methodology to quantify Argon concentration in IGUs using ultrasonic technique. The ultrasonic energy transmitted through the IGU is correlated with Argon concentration, validated through both experimental measurements and numerical models using COMSOL Multiphysics. The models simulate acoustic-structure interaction by adjusting gas density to reflect Argon presence, showing increased ultrasonic energy with higher Argon concentrations. Experimental measurements on two IGU samples with twenty Argon-air mixtures (ranging from 100% to 25% Argon) show that the proposed ultrasonic technique achieves a mean absolute error of 0.13, outperforming Spark Emission Spectroscopy and Helantec ISO-GAS-Control, which have errors of 2.31 and 0.33, respectively.