Two-dimensional piezoelectric micro displacement driver

Abstract

The invention discloses a two-dimensional piezoelectric micro displacement driver, comprising a base plate 1 and a lens frame 7. The base plate 1 is in fixed connection with a two-dimensional bidirectional driving mechanism through positioning blocks 5; the two-dimensional bidirectional driving mechanism comprises an external one-dimensional bidirectional driving unit and an internal one-dimensional bidirectional driving unit, wherein the external one-dimensional bidirectional driving unit is fixed to the base plate 1 through the positioning blocks, and the internal one-dimensional bidirectional driving unit is fixed to the external one-dimensional bidirectional driving unit through connecting pieces; the internal one-dimensional bidirectional driving unit is connected to the lens frame 7; the external one-dimensional bidirectional driving unit and the internal one-dimensional bidirectional driving unit respectively generate acting force in mutually perpendicular directions, allowing the lens frame 7 to move along two dimensions. The invention employs a displacement enlargement mechanism based on a triangle amplification principle, and connects enlarged displacements in two orthogonal directions in series; the displacements in two directions actuate independently, and do not couple, thereby reducing control difficulty.

Description

technical field [0001] The invention relates to the field of piezoelectric precision driving instruments, in particular to a two-dimensional piezoelectric micro-displacement driver. Background technique [0002] Image stabilization technology has a wide range of applications in the military field, civil aerial survey and photography systems. In terms of intelligence acquisition, with the development of military technology in various countries around the world, the ability of military satellites and reconnaissance aircraft to acquire images has been strengthened, especially the characteristics of intuitive, rich and easy acquisition, storage and transmission of image information, making it an important tool for future warfare. The main technical means of obtaining information in China. However, because the imaging carrier is affected by attitude changes and vibrations, the acquired image will be unclear, which will seriously affect the effective use of image information. Th...

AI Technical Summary

Problems solved by technology

However, although laminated piezoelectric ceramics can amplify the displacement, the size of the deformation is still limited. The traditional two-dimensional micro-displacement positioning platform adopts the lever amplification principle and the flexible hinge to produce a large difference between the thrust and pull of the platform output, and the lever and Flexible hinges also present problems with hysteresis

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