Object deformation measurement method in high-temperature environment

A measurement method and high-temperature environment technology, which is applied in the field of materials science and optical experiments, can solve the problems that the deformation area cannot be taken into account, the price of narrow-band filters is high, and it is not suitable for large-scale promotion and use, so as to eliminate the excessive difference in surface brightness and fill Effect of vacancies on deformation measurements

Active Publication Date: 2017-05-17
TSINGHUA UNIV
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Problems solved by technology

Therefore, the deformation area of ​​high temperature measurement often cannot take into account
At present, although there are reports that use narrow-band filtering plus corresponding monochromatic light compensation to suppress the influence...

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  • Object deformation measurement method in high-temperature environment
  • Object deformation measurement method in high-temperature environment
  • Object deformation measurement method in high-temperature environment

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0022] figure 1 It is a schematic structural diagram of an object deformation measuring device in a high temperature environment, and the device includes a lens 2 , a filter group 3 for automatically adjusting attenuation rate, a camera 4 and a computer 5 .

[0023] First, aim the lens 2 at the measured object 1, and adjust the focal length of the lens 2 to make the measured object 1 clearly image.

[0024] Then manually adjust the attenuation rate of the filter group 3 to the minimum, adjust the aperture of the lens 2 and the exposure time of the camera 4 to ensure that the brightness of the image formed by the darkest part of the surface of the measured object 1 is moderate.

[0025] At the beginning of the test, the camera collects an image at the initial attenuation rate, and then the...

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Abstract

The invention discloses an object deformation measurement method in a high-temperature environment. Firstly, image acquisition on the condition of different optical attenuation rates is performed on an object with relatively large surface area brightness difference. Furthermore based on the image acquisition, an image series synthesis method on the condition of different optical attenuation rates is presented. Furthermore deformation information is acquired based on a synthesized image. The object deformation measurement method has advantages of eliminating an influence of overlarge object surface brightness difference in the high-temperature environment, realizing deformation measurement on the object with relatively large surface temperature gradient in the high-temperature environment, and settling a defect of incapability of performing deformation measurement on the object with relatively large surface brightness difference. The object deformation measurement method supplies an important reference basis for testing an engine, a nose cone and a leading edge of an existing high-supersonic-speed aircraft.

Description

technical field [0001] The invention relates to a high-temperature deformation measurement method based on light attenuation and image processing technology, and belongs to the technical fields of material science and optical experiment. Background technique [0002] When a hypersonic vehicle is in service, its engine blades, nose cone, and leading edge are often exposed to extremely high temperatures. Ground high-temperature tests must be conducted on these hot-end components before official service. Among them, the measurement of the deformation of the hot-end parts in a high-temperature environment has important guiding significance for evaluating its thermodynamic performance indicators. Take the high-temperature wind tunnel assessment, which is currently the main method for assessing the hot-end structure and components of aircraft, as an example. In this assessment method, the temperature at the front end of the test piece facing the high-temperature and high-speed air...

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Application Information

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IPC IPC(8): G01B11/16G01N25/00
CPCG01B11/16G01N25/00
Inventor 冯雪屈哲方旭飞张长兴苏红宏
Owner TSINGHUA UNIV
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