Usage of fluorescent dopants for high precision and three-dimensional temperature distribution measurement for verification of models and simulations in plastics welding

使用荧光掺杂剂进行高精度三维温度分布测量，以验证塑料焊接中的模型和模拟

• 批准号: 251578016
• 负责人: Professor Dr.-Ing. Martin Bastian
• 金额: --
• 依托单位: Süddeutsches Kunststoff-Zentrum
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/251578016?language=en
• 关键词: Usage; fluorescent; dopants; precision; three

The usage of fluorescent dopants in polymers shall provide an opportunity to get a precise and spatially resolved temperature measurement on components during the welding process. The final goal of the developed method is to improve existing models and simulations for the welding process. Therefore, a three-dimensional spatially resolved temperature distribution in the region of the welded region is necessary. Currently no scientifically accepted and satisfactory ways allow the measurement of the temperature in the joining zone according to a three dimensional temperature resolution and without the direct influence of the welding process. The enormous potential through the use of temperature-sensitive fluorescent dopants for this purpose has already been successfully demonstrated in the application of a detailed temperature analysis in polymer melts during processing. Our preliminary investigations of solidified plastic samples confirmed the suitability of this method also for solid polymers. The incorporated dopants are only needed in the ppm range in the polymer and thus affect its physical and mechanical properties is negligible. The relationships between the fluorescence spectra of different dopants and polymers based on prevailing temperature should be investigated in this project in detail. Based on these dopants a measuring system shall be developed, which can provide new and as yet, less realizable measurement results with respect to the temperature distribution in the region of the joining zone during the welding process.

在聚合物中使用荧光掺杂剂将提供在焊接过程中对部件进行精确且空间分辨的温度测量的机会。所开发方法的最终目标是改进焊接过程的现有模型和模拟。因此，焊接区域中的三维空间分辨温度分布是必要的。目前，还没有科学上可接受且令人满意的方法允许根据三维温度分辨率测量连接区域中的温度，并且不受焊接过程的直接影响。在加工过程中对聚合物熔体进行详细温度分析的应用中，已经成功证明了为此目的使用温度敏感荧光掺杂剂的巨大潜力。我们对固化塑料样品的初步研究证实了该方法也适用于固体聚合物。掺入的掺杂剂仅需要在聚合物中的 ppm 范围内，因此对其物理和机械性能的影响可以忽略不计。本项目应详细研究基于当时温度的不同掺杂剂和聚合物的荧光光谱之间的关系。基于这些掺杂剂，应开发一种测量系统，该系统可以提供关于焊接过程中接合区区域的温度分布的新的且迄今为止不太可实现的测量结果。