Device for measuring spacecraft structure deformation based on speckle interference and fringe projection and measurement method

A technology of spacecraft structure and fringe projection, which is applied to measurement devices, optical devices, instruments, etc., can solve the problems of small measurement range and cannot meet the requirements of spacecraft measurement range, and achieve the effect of simple and reliable system implementation.

Inactive Publication Date: 2014-11-05
BEIJING INST OF SPACECRAFT ENVIRONMENT ENG
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Problems solved by technology

However, the measurement range of this measurement method is small, and the general measurement range is about 0.2m×0.2m, which cannot meet the large-scale measurement range requirements of spacecraft over 1m×1m

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  • Device for measuring spacecraft structure deformation based on speckle interference and fringe projection and measurement method

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Embodiment Construction

[0023] The device for measuring the deformation of a spacecraft structure based on speckle interference and fringe projection of the present invention will be further described below in conjunction with the accompanying drawings, but this is only proposed for exemplary purposes and is not intended to limit the protection scope of the present invention.

[0024] Such as figure 1 As shown, the device for measuring the structural deformation of a spacecraft based on speckle interference and fringe projection of the present invention mainly includes a laser speckle projection device 1, a CCD camera 2, a fringe projection device 4, a data acquisition and control unit 5, a fixed platform 6, Vibration isolation platform 7, heating controller 8, precision turntable 9, heating sheet 11, turntable one 13 and turntable two 14, fixed platform 6 and precision turntable 9 are respectively arranged at both ends of vibration isolation platform 7, fixed platform 9 is set There is a precision g...

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Abstract

The invention discloses a device for measuring spacecraft structure deformation based on speckle interference and fringe projection. The device mainly comprises a laser speckle projection device, a CCD camera, a fringe projection device, a data acquiring and control unit and the like, wherein local deformation of a measured structural slab is measured by the laser speckle projection device through a laser speckle interference measurement method, and the fringe projection measurement device is used for measuring large-scale deformation through fringe projection measurement and multiple times of measurement data combination. The spacecraft structure deformation is measured based on combination of speckle interference and fringe projection, large-scale and non-contact measurement on the spacecraft structure micro deformation can be achieved, the overall precision can reach 10 microns within the range of 2 m*2 m, and the measurement precision can reach 1 micron within the range of 0.2 m*0.2 m needing local high-precision measurement.

Description

technical field [0001] The invention belongs to the field of industrial measurement, and in particular relates to a space vehicle structure micro-deformation measurement device which comprehensively utilizes a speckle interferometry method and a fringe projection measurement method. In addition, the invention also discloses a method for measuring the microstructure deformation of the spacecraft by using the device. Background technique [0002] When the spacecraft is in orbit, the structural plates of the spacecraft will be slightly deformed due to environmental temperature changes and other reasons. With the continuous improvement of the accuracy requirements of the spacecraft's optical cameras, star sensors, antennas and other loads, higher requirements are also placed on the stability of the spacecraft structure. Therefore, in the process of spacecraft assembly development, it is necessary to measure the micro-deformation of the spacecraft structure caused by the on-orbi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/16
Inventor 杨再华陶力易旺民万毕乐闫荣鑫刘涛胡瑞钦徐志东刘浩淼阮国伟
Owner BEIJING INST OF SPACECRAFT ENVIRONMENT ENG
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