On Design of Ultrasonic Transducers and Accuracy of Velocity Measurements NDT.net - February 2000, Vol. Practical tasks Calculation examples Conclusions Introduction Design of innovative ultrasonic transducers was recently discussed in the NDTnet.
Some coupling is necessary to provide acoustic contact with the material surface.
One of the main parameters for the material characterization is wave velocity. Velocity values are used for evaluation of elastic constants, strength, or flaw detection. That is why accurate velocity measurements are very important for the NDT needs. Problems interconnecting design and accuracy of velocity measurements are going to be discussed in this papers. A simplified concept of wave propagation is used here.