Pre-tightening device and method of piezoelectric ceramic drivers in fast reflecting mirror system

Abstract

The present invention provides a pre-tightening device and pre-tightening method of piezoelectric ceramic drivers in a fast reflecting mirror system. The objective of the invention is to eliminate a defect that only a single constant unknown pre-tightening force can be applied in the prior art. The device includes a plurality of sets of differential fine-tuning locking assemblies and displacement sensors which are consistent with the piezoelectric ceramic drivers in number; each set of differential fine-tuning locking assembly includes a differential screw rod, a contact block and a locking jackscrew, wherein the differential screw rod is installed on a fast reflecting mirror seat in a matched manner through screw threads, the contact block is located between the hemispherical tip of the top of a corresponding piezoelectric ceramic driver and the differential screw rod, the upper end of the contact block is in matched connection with the differential screw rod through screw threads, the differential screw rod drives the contact block to move up and down, and the locking jackscrew is used for locking the contact block so as to prevent the contact block from shifting up and down; and the displacement sensors are arranged at positions which are adjacent to the contact blocks and the hemispherical tips and are used for feeding back the displacement change quantity of points to be measured of the mirror seat under the driving of the piezoelectric ceramic drivers. With the pre-tightening device and pre-tightening method of the invention adopted, pre-tightening forces can be applied to the piezoelectric ceramic drivers under quantitative control.

Description

technical field [0001] The invention relates to a pretension device and a pretension method of a piezoelectric ceramic driver, in particular to a pretension device and a pretension method of a piezoelectric ceramic driver in a fast mirror system. Background technique [0002] With the development and demand of industries closely related to the nation, such as medical care and industry, the precise pointing, tracking and stabilization technology of beams has received more and more attention and research. Among them, beam stabilization technology has become the key core in the fields of precision machining and adaptive optics. One of the techniques. [0003] The demand for fast and high-precision beam tracking technology of fast mirrors arises at the historic moment. Different from traditional beam stabilization systems, fast mirrors usually use flexible structural parts instead of traditional shafting as a frictionless and gapless precision rotating part. The mirror achieve...

AI Technical Summary

Problems solved by technology

[0006] For the fast mirror system with the piezoelectric ceramic driver as the driving source mentioned in the above background, when installing and pre-tightening the piezoelectric ceramic driver, only a single fixed and unknown preload can be applied, resulting in the applied preload The impact of tightening force on the tensile performance and dynamic push-pull characteristics of piezoelectric devices cannot be pre-judged and controlled. The present invention provides a pre-tightening device and a pre-tightening method for piezoelectric ceramic drivers, which can quantitatively control the applied pre-tightening Force to achieve fast and precise drive control of fast mirrors

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