DopIer Radar in Crack Testing

摘要

A unique phenomenon in physics has been revealed. Due to internal mechanical stress and defects the surface electrical conductivity of metallic objects can be modified. This conductivity modification even exists for some time after the failure of the mechanical attack. The data presented in this paper proves the effectiveness of the discovered phenomenon. Designed microwave sensor reveals remote closed metal defects. Experiments in detecting cracks within rail-wheel rims were one of the first applications.