The current metrological verification system for traditional theodolite has disadvantages of large volume, low automation, inconvenient metrological operation and bad measurement repeatability.

传统的经纬仪计量检定系统体积庞大、自动化程度低、溯源和传递不便、测量重复性差。

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On the introduce of alternative current field measurement (ACFM), the mathematic and theoretical model of ACFM were analyzed, and especially the flaw model at large.

在介绍了交变磁场测量原理的基础上，分析并给出了交变磁场测量法的数学和理论模型，对缺陷模型进行了详尽的分析。

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