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Spatial camera image stabilizing method based on flutter measurement of fiber-optic gyroscope

A technology of space camera and fiber optic gyroscope, which is applied in the direction of measuring devices, photographing devices, instruments, etc.

Inactive Publication Date: 2013-01-16
ZHEJIANG UNIV
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to provide a space camera image based on optical fiber gyroscope chatter measurement for the limitations of current space camera chatter measurement and image compensation methods stabilization method

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  • Spatial camera image stabilizing method based on flutter measurement of fiber-optic gyroscope
  • Spatial camera image stabilizing method based on flutter measurement of fiber-optic gyroscope
  • Spatial camera image stabilizing method based on flutter measurement of fiber-optic gyroscope

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Embodiment Construction

[0018] The fiber optic gyro can measure the angular velocity of the object, and the angular displacement can be obtained by time integrating the angular velocity measured by the fiber optic gyro, and the flutter information can be obtained by analyzing the measured angular displacement. The principle formula of measuring angular displacement by fiber optic gyroscope is shown in formula (1):

[0019] (1)

[0020] in, is the angular velocity of the nth point;

[0021] is the angular increment from the beginning to the i-th sampling point, and the value of i is 1 to the actual number of sampling points;

[0022] is the sampling interval.

[0023] The space camera image stabilization system based on fiber optic gyroscope flutter measurement includes three parts: time scale synchronizer, flutter measurement device and image compensation system.

[0024] The time scale synchronizer is realized by dsp. At the beginning of the measurement cycle,...

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Abstract

The invention discloses a spatial camera image stabilizing method based on flutter measurement of a fiber-optic gyroscope. The basic premise for ensuring the normal work of a spatial camera CCD (charge coupled device) is to keep the migration of photo-generated charge packets synchronous with the motion of images on a focal plane, and any mismatching will result in image blurring; and flutter can result in image shift during integral imaging of the camera so as to destroy the motion synchronization of the photo-generated charge packets and to influence the imaging quality of the camera. According to the invention, a large-bandwidth and high-precision fiber-optic gyroscope is adopted to measure flutter information of the spatial camera, then the flutter information is processed by a data processor to obtain corresponding image plane shift, finally the images picked up by the spatial camera are compensated by using charge shift compensation technique to obtain stable images, thereby ensuring high-resolution image output of the spatial camera.

Description

technical field [0001] The invention relates to the field of optical fiber sensing in optoelectronic technology, in particular to a space camera image stabilization method based on optical fiber gyroscope flutter measurement. Background technique [0002] For the space camera TDICCD, the basic premise of its normal work is that the transfer of photogenerated charge packets is kept in sync with the movement of the image on the focal plane, and any mismatch will cause image blur. The flutter will cause the camera to generate image shift during the integral imaging process, destroying its synchronization with the movement of the photogenerated charge packet, affecting the imaging quality of the camera, resulting in a decrease in the resolution of the space camera and a decrease in the performance of the satellite system. [0003] The high-speed and high-precision measurement of optical satellite platform and camera flutter is usually realized by the image correlation method thr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C11/02G01C25/00
Inventor 缪立军胡慧珠陈骁杰徐之海刘承舒晓武
Owner ZHEJIANG UNIV
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