本文是近几年来专题调研的成果之一,专门介绍历史上已使用的、目前仍在使用并逐渐扩大其应用领域的一种机械电磁探测仪(或称为“魔杖”仪)。这种仪器在民间和军事上有许多重要用途,而且还可用于找矿。本文主要介绍“魔杖”仪的一般原理、仪器结构及各种有代表性的仪器型号和这类仪器的主要应用。 This article is one of the achievements of the special research in recent years. It is devoted to a mechanical electromagnetic detector (or “magic wand”) that has been used in history and is still being used and is gradually expanding its application fields. This instrument has many important uses both civilly and militaryly and can also be used for prospecting. This article describes the general principle of the “magic wand” instrument structure and a variety of representative instrument models and the main application of such instruments.