Diagnostic method for rebuilding three-dimensional geometric profile of knocking flame surface

A technology of three-dimensional geometry and diagnostic methods, applied in 3D modeling, image data processing, instruments, etc., can solve problems such as binocular stereo vision system synchronization, and achieve the effect of avoiding the need for synchronization

Inactive Publication Date: 2015-04-08
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0003] In order to overcome the deficiency that the binocular stereo vision system needs to be synchronized in the existing diagnostic methods, the present invention provides a diagnostic method for reconstructing the three-dimensional geometric shape of the detonation flame surface

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  • Diagnostic method for rebuilding three-dimensional geometric profile of knocking flame surface
  • Diagnostic method for rebuilding three-dimensional geometric profile of knocking flame surface
  • Diagnostic method for rebuilding three-dimensional geometric profile of knocking flame surface

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Embodiment Construction

[0025] refer to Figure 1-2 . The specific steps of the diagnostic method for reconstructing the three-dimensional geometric shape of the detonation flame surface in the present invention are as follows:

[0026] Step 1: Build the experimental system. Refer to attached figure 1 In the figure, the high-speed camera 2 is placed on the tripod 1, and a four-mirror binocular mirror splitter 3 is added in front of the high-speed camera 2 to form a high-speed binocular stereoscopic vision system. The system is placed in front of the observation window 5 of the detonation tube 4. location. It is best to place the system so that the observation window can form two clear images in the camera and the image fills the entire view. According to experience, the system is about one meter away from the detonation tube observation window. After adjusting parameters such as aperture, focal length and shutter, keep the whole system still.

[0027] Step 2: Calibration of the system. The cali...

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Abstract

The invention discloses a diagnostic method for rebuilding a three-dimensional geometric profile of a knocking flame surface. The diagnostic method is used for solving the technical problem of the present diagnostic method that a binocular stereo vision system needs to be synchronized. According to the technical scheme, a high-speed binocular stereo vision system is adopted for establishing an experimental system; a Zhengyou Zhang calibration method is adopted for calibrating the experimental system; the experimental system is utilized to image the knocking flame and treat the image; a normalization cross-correlation algorithm is used for matching the acquired images, thereby acquiring corresponding matching point pairs on the two images; a three-dimensional coordinate of a spatial point corresponding to the image point on the images is calculated according to a three-dimensional reconstruction algorithm, so that the rebuilding of the three-dimensional geometric profile of the knocking flame surface is realized. The high-speed binocular stereo vision system is adopted for rebuilding the knocking flame surface, so that the technical problem of the diagnostic method in the background technology that the binocular stereo vision system needs to be synchronized is solved.

Description

technical field [0001] The invention relates to a diagnosis method of a three-dimensional geometric shape, in particular to a diagnosis method for reconstructing a three-dimensional geometric shape of a detonation flame surface. Background technique [0002] The literatures "Principle and Key Technology of Pulse Detonation Engine, 2005, p341-343" and "Combustion Experimental Diagnostics, 2005, p2-3, p180-187" systematically introduced the so far used detonation combustion flow field and Some diagnostic methods revealed by the flame structure. At present, the diagnostic methods used to display the flow field and flame structure of detonation combustion mainly include ordinary photography and holography. Both methods have their own advantages and disadvantages. Ordinary photography uses high-speed photography or electron microphotography to image the combustion flame, and read the structure of the flame according to the captured images. Reading a group of continuously captur...

Claims

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Application Information

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IPC IPC(8): G06T17/00G06T7/00
CPCG06T17/00G06T2207/10004G06T2207/20024G06T2207/30164G06T7/30G06T7/80
Inventor 黄希桥熊月飞郑龙席
Owner NORTHWESTERN POLYTECHNICAL UNIV
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