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Flame temperature field rebuilding method based on physical parameter consistency

A technology of flame temperature and physical parameters, applied in the field of measurement, can solve problems such as the inability to guarantee the accuracy of the temperature field and the inability to describe the effect of flame on light refraction.

Inactive Publication Date: 2014-05-21
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0006] The purpose of the present invention is to provide a flame temperature field reconstruction method based on the consistency of physical parameters to solve the problem that the traditional flame temperature field calculation model cannot guarantee the accuracy of the temperature field because it cannot describe the flame’s refraction of light. The problem

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  • Flame temperature field rebuilding method based on physical parameter consistency
  • Flame temperature field rebuilding method based on physical parameter consistency
  • Flame temperature field rebuilding method based on physical parameter consistency

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[0068] Figure 4 Shown is a high dynamic range flame image captured simultaneously from four viewing angles by a Photonfocus COMS industrial camera model MV1-D1312I-160-C031-CL-12, and the flame source is an alcohol lamp. Each row corresponds to the same frame of flame images from four viewing angles, and each column corresponds to flame images from different frames of the same viewing angle. In the flame image, the brightness distribution has obvious regularity, that is, the flame is composed of a bright flame head and a blurred flame body. Through the threshold method, the highlighted head of the flame can be easily extracted, and the visual shell technology is applied to the head to obtain the spatial geometric information of the flame head, and the space where the flame head is located is voxelized.

[0069] The response curve of the calibrated high dynamic range camera is as follows Figure 5 shown. Figure 5 Among them, the ordinate is the brightness value of the imag...

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Abstract

A flame temperature field rebuilding method based on physical parameter consistency comprises the following steps of a, synchronously shooting an image sequence of a combustion flame from a plurality of angles of view and voxelizing the flame through a visual hull technology; b, calibrating a response curve of a camera; c, initiating a flame refractive index field and computing an initial radiation force field of the flame according to an imaging model of the flame; d, computing the radiation force field and the refractive index field in an iterative mode until the radiation force field and the refractive index field meet physical consistency in numerical value; e, computing a final flame temperature field according to a lookup table between a radiation force and a temperature. The flame temperature field rebuilding method based on the physical parameter consistency is based on the fact of the consistency of the two physical parameters of the flame radiation force field and the refractive index field, an algorithm for computing the flame temperature field in an iterative is provided, and the flame temperature field rebuilding method fully takes refraction on light rays due to uneven distribution of the flame refractive index field into consideration, so that the accuracy of temperature rebuilding is greatly improved. The flame temperature field rebuilding method based on the physical parameter consistency can be applied to field of commercial measurement, thermal power plant monitoring, virtual reality and the like.

Description

technical field [0001] The invention relates to a method for accurately reconstructing a flame temperature field according to the physical consistency of a radiation force field and a refractive index field, and belongs to the field of measurement technology. Background technique [0002] Fire is a common natural phenomenon. It is a violent chemical reaction process accompanied by luminescence and heat release. It is also the most important way for chemical energy to be converted into heat energy. Flame is the external appearance of fire. In my country's coal-based energy structure, coal energy accounts for about 70% of the total energy. Therefore, it is of great significance to carry out combustion optimization control and improve energy utilization rate in thermal power production. Temperature is one of the most important physical characteristics of a flame, and its spatial distribution and change rule directly reflect the state of the flame. Therefore, whether the accura...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T17/00
Inventor 王旭光苏杰程海燕
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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