Patent ID: 9638673
Date: 2017-05-02
CPC Classifications: G01N

Claim:
1. A non-destructive inspection or testing (NDT/NDI) device configured for inspecting a test object, comprising: a probe configured for pulsing a test object during a testing cycle at a testing location with N pulses to produce and receive N sets of wave responses, and to produce therefrom N sets of electric echo signals; at least one analog to digital converter configured to digitize the N sets of echo signals and to produce therefrom N sets of digitized signal samples, which correspond respectively to N sets of acquired signal samples and N sets of noise signal samples; a digital logic device, having a data processing unit configured to execute an averaging process by which the N sets of signal samples are summed and averaged to produce a final testing result; wherein each one of the N sets of noise signal samples includes a residual acoustic energy from a previous one of the N sets of noise signal samples, wherein the digital logic device further comprises a pulser control unit configured to control the pulsing according to a dithery pulsing sequence by which the probe is pulsed in a random dithery manner given by a plurality of dither values which are independent between one pulse and another so that the combination effect of the residual acoustic energy from the N sets of the noise signal samples is decimated during the averaging process and in the testing result, wherein the averaging process is conducted regardless of the dithery pattern, and, wherein the dithery pulsing sequence is governed by T