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System and method for angular vibration measurement by using high-speed cameras and autocollimators

A technology of high-speed camera and autocollimator, applied in measuring devices, using wave/particle radiation, measuring ultrasonic/sonic/infrasonic waves, etc., can solve problems such as large measurement errors, and achieve easy construction, low requirements, and wide application range Effect

Pending Publication Date: 2019-02-22
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0005] In order to overcome the problem of large measurement errors caused by the sensor's own weight in the existing measurement methods pointed out in the background technology, the present invention provides a system and method for angular vibration measurement using a high-speed camera autocollimator

Method used

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  • System and method for angular vibration measurement by using high-speed cameras and autocollimators
  • System and method for angular vibration measurement by using high-speed cameras and autocollimators
  • System and method for angular vibration measurement by using high-speed cameras and autocollimators

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Embodiment Construction

[0045] The system provided by the present invention will be described in more detail below in conjunction with the accompanying drawings.

[0046] measuring system

[0047] Such as figure 1 Described, measuring system of the present invention comprises right-angle reflective prism 1 (because mirror can amplify the deflection angle of incident twice, so the present invention has adopted right-angle reflective prism), the first high-speed camera 2, the second high-speed camera 3, A first autocollimator 4, a second autocollimator 5 and a computer 6;

[0048] The right-angle reflective prism 1 is installed on the tested object 7 (the tested object refers to a payload such as a space precision motion mechanism or an optical camera), and the first autocollimator is sequentially arranged along the normal direction of a right-angled reflective surface of the right-angled reflective prism 1 4 and the first high-speed camera 2;

[0049]A second autocollimator 5 and a second high-spee...

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Abstract

The present invention relates to a system and method for angular vibration measurement by using high-speed cameras and autocollimators. The problem of a large measurement error due to the self-weightof a sensor in an existing measurement method is overcome. The system comprises a right-angle reflecting prism, a first high-speed camera, a second high-speed camera, a first autocollimator, a secondautocollimator and a computer. The right-angle reflecting prism is installed on a tested piece, the first autocollimator and the first high-speed camera are orderly arranged along the normal directionof a right-angle reflecting surface of the right-angle reflecting prism, the second autocollimator and the second high-speed camera are orderly arranged along the normal direction of another right-angle reflecting surface of the right-angle reflecting prism, and both the first high-speed camera and the second high-speed camera are connected to the computer. The method mainly comprises the steps of [1] system installation, [2] synchronization and self-alignment, [3] the synchronous acquisition of images, and [4] image processing and the acquisition of angular vibration characteristics.

Description

technical field [0001] The invention belongs to the technical field of precise measurement for aerospace applications, and in particular relates to a system and method for measuring angular vibration by using a high-speed camera autocollimator. Background technique [0002] The measurement and suppression of spacecraft angular vibration is the premise to realize high-precision and stable pointing of space precision motion mechanism and high-resolution and clear imaging of optical remote sensing payload. The amplitude and frequency characteristics of spacecraft angular vibration are coupled with the imaging parameters of space precision motion pointing mechanism and optical remote sensing payload , it may affect the pointing accuracy of precision mechanisms, tracking stability and imaging quality of optical remote sensing payloads. [0003] The current method of directly measuring angular vibration is mainly based on gyroscope angular velocity or angular displacement sensors....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H9/00
CPCG01H9/00
Inventor 崔凯折文集杨永清谢友金郑志奇
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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