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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.
The ancient architecture represented by the Great Wall is a treasure of the world and a symbol of the Chinese nation.This paper proposes the use of a portable nuclear magnetic resonance (NMR) device to detect and study building materials of such ancient buildings without damaging them , To explore its implication of science, technology and engineering-related rich information.To this end, as a first step, designed to detect such ancient buildings portable single-edged NMR detector combination magnet.The magnet structure of the detector On the basis of semi-Halbach, the magnet structure corresponding to the moving detection mode, the long-distance detection mode and the uniform magnetic field detection mode is obtained through the combination of different magnet modules. Subsequently, based on the optimization result, the magnet assembly is designed and processed and the magnet is used Fluid, the Great Wall city brick and the modern red brick NMR experiment, the measured results consistent with the simulation.The advantages of this combination of magnets through the combination of different magnet modules, to achieve a variety of detection methods, suitable for detecting such ancient buildings such as the Great Wall needs A variety of exploration mode of scientific research.