This paper discusses the basic concept of EDT, mining detecting information using extension method, concept of detectable matter-element and KDM, method to judge and distill KDM, how to apply and validate KDM and so on.

• 本文论述了可拓检测的有关定义和基本原理、利用可拓学方法挖掘检测信息的方法、可拓检测中的可测物元及关键可测物元的概念、关键可测物元的判定及提取方法、关键可测物元的应用及验证等内容。