| 摘要 |
FIELD: measuring technique. ^ SUBSTANCE: device comprises at least one mechanical vibration unit and at least one driving/receiving unit. The driving/receiving unit excites vibration of the vibration unit (or receives the vibration of the vibration unit) and has at least one piezoelectric drive having at least one outer surface. The outer surface is composed of at least two segments of different polarization. ^ EFFECT: enhanced precision. ^ 28 cl, 20 dwg |
