Proofreading manner and the potential difference modulo measuring device in potential difference modulo measuring

摘要

Abstract Topic Precision improvement of the crack measurement with potential difference modulo is assured. Solutions The sample of conductivity of the thickness T where crack K existsWhen letting flow fixed electric current to 1, voltage drop of the crack section which it occurs EWith it does. In addition, voltage drop of the region which does not have crack K is designated as Eoru. This time, the potential difference ratio E/E for the change of crack depth aThe change of o proofreading approximate expression E/Eo=1+f (a)/(Ta) with you display. On the basis of this proofreading approximate expression aforementioned potential difference ratioThe relation of E/Eo between aforementioned crack depth a is proofread.