Patent ID: 9140672
Filing Date: 2015-09-22
Classification: G01N

Abstract:
1. Use of a calibration block for calibrating the signal sensitivity and/or gain of an angular scanning phased array ultrasonic testing scanner arranged to generate a primary wave front at a plurality of contiguous beam angles across a scanning envelope, the calibration block being formed of an acoustically transmissive material and comprising: first major surface having a peripheral edge; a second major surface; a calibration surface disposed between general planes of the first and second major surfaces and configured to extend in a generally circular arc so as to be generally equidistant from a central axis, the peripheral edge of the first surface being spaced further from the central axis than the calibration surface; and an input surface for acoustically coupling to an ultrasound transducer of the ultrasonic testing scanner and being arranged to position the transducer such that the path length of the primary wave front from the transducer to the calibration surface is generally equal for each beam angle across the scanning envelope.