用于长城等古建筑探测的NMR探测器的磁体设计

发布时间：2018-03-01 12:44

本文关键词： 核磁共振(NMR) 单边磁体磁场　出处：《波谱学杂志》2017年03期 　论文类型：期刊论文

【摘要】：以万里长城为代表的古建筑是世界瑰宝,更是中华民族的象征和骄傲.本文提出利用便携式核磁共振(NMR)装置来探测研究这类古建筑的建筑材料,在不对其造成损伤的基础上,发掘其隐含的科学、技术和工程相关的丰富信息.为此,作为第一步,设计了适合于探测这类古建筑的便携式单边NMR探测器组合式磁体.该探测器的磁体结构以semi-Halbach为基础,通过不同磁体模块间的组合得到对应移动探测模式、长距离探测模式和均匀磁场探测模式的磁体结构.随后根据优化结果,设计加工了磁体组件,并采用该磁体进行了流体、长城城砖和现代红砖的NMR实验,实测结果与模拟一致.该组合式磁体的优点在于通过不同磁体模块组合,实现了多种探测方式,适用于探测长城等这类古建筑物需要多种探测模式的科学研究.
[Abstract]:The ancient architecture represented by the Great Wall is a treasure of the world and a symbol and pride of the Chinese nation. In this paper, a portable nuclear magnetic resonance (NMR) device is proposed to detect and study the building materials of these ancient buildings, without causing damage to them. For this reason, as a first step, a portable one-sided NMR detector combination magnet suitable for detecting such ancient buildings was designed. The structure of the detector is based on semi-Halbach. Through the combination of different magnet modules, the corresponding magnet structures of moving detection mode, long range detection mode and uniform magnetic field detection mode are obtained. Then, according to the optimized results, the magnet assembly is designed and manufactured, and the fluid is carried out by the magnet. The NMR experiments of the Great Wall city brick and modern red brick show that the measured results are consistent with the simulation. The advantage of the combined magnet is that it realizes a variety of detection methods through the combination of different magnet modules. It is suitable for detecting such ancient buildings as the Great Wall and so on.
【作者单位】：中国石油大学(北京)油气资源与工程国家重点实验室;中国石油大学(北京)理学院;Harvard
【基金】：国家自然科学基金资助项目(21427812,41674137) “111计划”资助项目(B13010) 北京市自然科学基金资助项目(8164052)
【分类号】：O482.532;TU198

【相似文献】