Screen-printed and fired PZT-based films have been used as the source and detectors of elastic waves near the surface of a torsional shaft. The change in wave propagation velocity due to applied torques has been taken as the operating principle of a torque sensor. The new opportunities opened by piezoelectric thick-film materials in the implementation of this novel sensor are demonstrated.
A NOVEL TORQUE SENSOR-BASED ON ELASTIC-WAVES GENERATED AND DETECTED BY PIEZOELECTRIC THICK-FILMS / Morten, Bruno; Decicco, G; Prudenziati, Maria. - In: SENSORS AND ACTUATORS. A, PHYSICAL. - ISSN 0924-4247. - STAMPA. - 41:(1994), pp. 33-38.