The calculation of DGS diagrams for ultrasound testing systems with the use of phased arrays

The use of the inverse C-SAFT method for equalizing the spatial sensitivity of reflector images

“…(5) Owing to corrections of the amplitude and phase distortions in measured echo signals, the TS M invC SAFT method allows the frontal resolution of reflector images to be increased by several times (Fig. 8).…”

“…A more rigorous calculation of the directivity characteristic of an ele mentary area of a transmitter in a solid is presented in [13]. The simplest estimate of the scattered field at the point, r t , for a transmitting element and at the point, r r , for a receiving element can be written in the form (5) where D w, o (α 1, t ) and D o, w (α 1, r ) are the pressure refractive indices for the angles α 1, t and α 1, r for waves passing from the wedge to the TO and back, respectively. The coefficient of reflection from a side hole whose diameter is smaller than the wavelength is assumed to be equal to V(α t , α r , r) = -1, and s(t) is the shape of the received signal.…”

“…If the table of amplitudes of reflections from flat bottom holes as a function of their coordinates (the AA and wedge types, the focusing law) is known, it can be used to determine the equivalent area from the reflection amplitude. A variant of solving this problem for analyzing reflector images in the AUGUR ART system was proposed in [5].…”

Method of Processing Data of Acoustic Array

“…For the visualization of the object of the control it is necessary to calculate resulting matrix, which will contain in its columns and rows total amplitudes at a given point. The grade of matrix is aligned with the grade of image of the object of the control [5][6][7][8].…”