Testing device for inhibiting dithering of speckle image under aerobic environment with high temperature of 1200 DEG C

A speckle image, high temperature environment technology, applied in measurement devices, optical devices, instruments, etc., to achieve the effect of convenient installation and simple device structure

Inactive Publication Date: 2018-09-11
BEIHANG UNIV
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Problems solved by technology

[0008] The technical problem to be solved by the present invention is: when measuring high temperature deformation based on non-contact optical method in an aerobic high temperature e

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  • Testing device for inhibiting dithering of speckle image under aerobic environment with high temperature of 1200 DEG C
  • Testing device for inhibiting dithering of speckle image under aerobic environment with high temperature of 1200 DEG C
  • Testing device for inhibiting dithering of speckle image under aerobic environment with high temperature of 1200 DEG C

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0031] like figure 1 As shown, the present invention is a test device for suppressing speckle image shake in a 1200°C aerobic high-temperature environment, which consists of a light-weight high-temperature ceramic plate 1, an orthogonal quartz lamp heating array 2, a light-transmitting window 3, and a light-weight ceramic heat insulation frame 4 , speckle particles 5, flat test piece 6, quartz glass frame 7, heat insulation and light transmission channel 8, light transmission hole 9, MOS camera 10, bandpass filter 11, lens 12 and image processing computer 13. The light high-temperature ceramic plate 1 is installed on the front and rear sides of the orthogonal quartz lamp heating array 2, and the light ceramic heat insulation frame 4 is set around the orthogonal quartz lamp heating array 2, so that the heating area forms a closed space, The fl...

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Abstract

The invention discloses a testing device for inhibiting dithering of a speckle image under an aerobic environment with high temperature of 1200 DEG C. The device comprises a light-weight high-temperature ceramic plate, an orthogonal quartz lamp heating array, a light-pervious window, a light-weight ceramic thermal-insulation frame, speckle particles, a panel test piece, a quartz glass square frame, a thermal-insulation light-pervious channel, a light-pervious hole, an MOS camera, a band pass filter, a lens and an image processing computer. In a high-temperature heat test, the temperature rises, the density of hot air decreases, the hot air moves upward, and the difference in upper and lower air densities in a heating area causes an unsteady change in the refractive index of the air to cause dithering of an image, so that the correlation analysis of a digital image fails. In order to obtain a clear image of surface deformation before heating, the invention comprehensively adopts multi-level multi-segment space sealing and area isolation measures to inhibit dithering of the hot air in an effective transfer path of optical information, thereby obtaining a clear speckle image of surface deformation of the part before being heated in an aerobic environment with high temperature and the full field deformation of the heated surface.

Description

technical field [0001] The invention relates to a test device for suppressing speckle image shaking in a 1200°C aerobic high-temperature environment. Especially when the non-contact optical method is used for high-temperature deformation measurement, the vibration of hot air can be suppressed, and a clear speckle image of the hot surface can be obtained, and then the high-temperature deformation data of the whole field can be obtained, which provides a basis for the thermal strength analysis and safety reliability design of high-speed aircraft. Important experimental testing means. Background technique [0002] When a high-speed aircraft flies in the atmosphere at a high Mach number, it rubs against the air violently to produce serious aerodynamic heating. The harsh aerodynamic thermal environment causes the temperature of the outer surface of the aircraft to rise sharply, and the mechanical properties of the materials and structures of the aircraft change. The thermal stra...

Claims

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Application Information

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IPC IPC(8): G01N25/00G01B11/16
CPCG01B11/16G01N25/00
Inventor 吴大方林鹭劲任浩源
Owner BEIHANG UNIV
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