Cymbals driver based on tangential distortion and its driving method

Abstract

The invention discloses a cymbal-shaped driver based on tangential deformation, which comprises a piezoelectric element, an upper metal elastomer and a lower metal elastomer. The piezoelectric element is in double-deck toroidal structure. The metal elastomer is in semi-cymbal shape. The upside of the piezoelectric element is connected with the bottom of the upper metal elastomer. The underside of the piezoelectric element is connected with the bottom of the lower metal elastomer. Signal input lines are connected between the double rings of the piezoelectric element. An earth wire is connected between the piezoelectric element and the upper metal elastomer; another earth wire is connected between the piezoelectric element and the lower metal elastomer. The invention also discloses a drive method of the cymbal-shaped driver. Regarding the driver, the traditional displacement driving power section and actuator are manufactured into one piece. The utility model has the advantages of large displacement, high rigidity, working safely, simple structure, compactness, minitype and thinness, light weight, low dissipation of energy, no noise, no electromagnetic interference, high precision and high resolution and so on, and is applicable for mechanical systems of optics and electronics and so on requiring precise displacement.

Description

technical field [0001] The invention relates to a micromachine using piezoelectric effect, in particular to a cymbal driver based on tangential deformation and its driving method. Background technique [0002] In the existing cymbal drivers, the cymbal composite layer structure usually consists of a piezoelectric ceramic disk and a half-cymbal metal elastomer. The piezoelectric ceramics in the cymbal composite layer structure are usually polarized along the axial direction. After the ceramic is excited and deformed in the axial direction, according to the relationship between d33 and d31 in the piezoelectric coefficient of the piezoelectric ceramic, the axial displacement deformation d33 is converted into the radial displacement deformation of the ceramic disc d31, and the radial displacement deformation of the ceramic disc is It also causes the displacement and deformation of the metal elastic body of the cymbal structure along the axial direction. However, since d31 is on...

AI Technical Summary

Problems solved by technology

However, since d31 is only 1 / 2 to 1 / 3 of d33, according to the relationship between d31 and d33, the radial displacement deformation of the piezoelectric ceramic disc is only 1 / 2 to 1 / 3 of the axial displacement deformation, so it is difficult to realize The metal elastic body of the cymbal structure has a large deformation in the axial direction, the displacement is small, and the displacement conversion efficiency is low

Images