Electronic scanning type ultrasonic non-destructive testing apparatus

摘要

An ultrasonic non-destructive testing apparatus of the electronic scanning type comprising transmitter for producing exciting pulses in response to a predetermined timing pulse, a probe coupled to said transmitter, having a plurality of transducers for transmitting ultrasonic waves into a body to be tested and for receiving ultrasonic echo waves, signal processor coupled to said probe for processing said ultrasonic echo waves received by said probe to generate an echo wave signal, a memory coupled to said signal processor for storing reference data on an amplitude attenuation of an ultrasonic echo coming through each beam propagating path which is obtained by transmitting the ultrasonic waves into a calibration body at the time of a calibration, calculator coupled to said memory for calculating a predetermined correction value on the basis of said reference data stored in said memory, said predetermined correction value being at each crossing points on a two dimensional coordinate by applying a linear interpolation, correcting circuit coupled to said signal processor for correcting an amplitude attenuation of said echo wave signal by using said predetermined correction value at each crossing points to generate a corrected echo wave signal, and display device coupled to said correcting circuit for displaying a wave with regard to said body on the basis of the corrected echo wave signal.