117 Non-destructive Inspection for Inner Fault of Concrete Pole by Elastic Impulse Waves Method

Abstract

This paper describes the Ω oIrdestructive inspect ． ion me む hod Ibr inner 血 ult ofoon α ete pole by elastic i皿 pulse waves method ． Detected signals are analysed by delay t− i皿 e of propagt ， i ・