Ultrasonic Testing

As high-frequency sound waves travel, they reflect when hitting an obstacle. Depending on the angle of incidence, the reflected signal may or may not reach the receiver probe. The signal reaching the receiver probe appears as an echo on the instrument screen; from its position and height, the reflector's coordinates within the part are calculated and its type interpreted.

Coarse grain structure or high attenuation can make inspection difficult or sometimes even impossible. Significant local variations in sound velocity and attenuation within the test piece also make accurate evaluation difficult. Probes specially designed for the inspection surfaces and reference blocks are used for accurate, reliable results.