Scanning mechanism used for optical remote sensing instrument

Abstract

The invention discloses a scanning mechanism used for an optical remote sensing instrument. The scanning mechanism includes a scanning mirror assembly, a scanning mechanism support, a drive shaft assembly, a moving shaft assembly, a thin film support, a support light shade, a shaft light shade and a locking device protecting cover. The scanning mirror assembly includes a scanning mirror, a gluing bush, a flexible support and a scanning mirror support. The moving shaft assembly includes a moving half shaft, in-pair angular contact ball bearings, a switching flange, an electromagnetic locker, a bearing lock nut and a maze seal ring. The drive shaft assembly includes a drive half shaft, in-pair angular contact ball bearings, a bearing seat, a drive motor, a motor housing, a magnetic shielding shade, a round induction synchronizer, a synchronizer protection shade, a bearing locking nut and a maze seal ring. The scanning mechanism is advantaged in that the scanning rate is high and the efficiency is high; the scanning detection field is large; the scanning precision is high; the temperature adaptability is good; the structure is simple; the reliability is improved since direct drive is adopted and use of a speed reduction mechanism with a complex structure is avoided.

Description

technical field [0001] The invention relates to the technical field of motion mechanisms of aerospace optical remote sensing instruments, in particular to a scanning mechanism for optical remote sensing instruments. Background technique [0002] With the development of the aerospace industry, the scanning mechanism of space optical remote sensing instruments has become more and more widely used because it can expand the observation field of view. The existing scanning mechanism adopts an area array detector plus a dual-axis scanning method, which has a long scanning period and low detection efficiency. The Fengyun-2 meteorological satellite takes an image of the Earth every 60 minutes, and the new-generation Fengyun-4 meteorological satellite also needs to take an image every 15 minutes. The scanning mechanism of the Fengyun-2 scanning radiometer has a set of deceleration mechanism, which has a complex structure and is difficult to assemble. Patent No. Application Publicat...

AI Technical Summary

Problems solved by technology

The scanning mechanism of Fengyun-2 scanning radiometer has a set of deceleration mechanism, its structure is complex and difficult to assemble

Patent No. Application Publication No. CN103592760A proposes "a high-precision optical scanning mechanism with a large field of view". According to the description in Sections 3 and 4 of its claims, it can be known that a gear reduction mechanism is designed in its structure, and the total reduction ratio of the reducer is 40. :1, increasing the difficulty of processing and assembly

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