Methane combustion fuel-air ratio judgment method based on image processing technology

Abstract

The invention relates to a methane combustion fuel-air ratio judgment method based on an image processing technology. The method comprises the following steps of extracting the blue-green chemiluminescence flames of 180-252 degrees in a Hue hue in a flame combustion area according to the fact that the color of flame chemiluminescence is mainly generated by CH * and C2 * ion luminescence; and respectively listing equations of the brightness of the blue and green channels of the pixel points and the sensitivity of CH* and C2* and camera hue according to the sensitivity of the camera to the chromaticity, solving the equations to obtain the brightness ratio of CH* and C2* in the camera, and establishing a corresponding relation between the ratio and the fuel-air ratio for judging the fuel-air ratio of the flame to be detected. Compared with the prior art, the flame state in a combustor can be instantly and automatically monitored through the image processing technology, and a convenient and effective technical means is provided for the flame distribution condition in the combustor, the performance test of the combustor and the design of the combustor.

Description

technical field [0001] The invention belongs to the field of flame detection, and in particular relates to a method for judging the fuel-air ratio of methane combustion based on image processing technology. Background technique [0002] Efficient use of fuel and reduction of emissions are the main goals of combustion detection research, and optical visualization of flames plays an important role in gaining insight into complex combustion phenomena. Taking the internal combustion of the engine as an example, by recording the ignition state, gas dynamic characteristics, flame oscillation and other images, the analysis of information such as flame color, temperature, edge detection, and area division can be carried out. With the actual knowledge of combustion, the engine can be repaired without dismantling The diagnosis of the internal combustion state can also detect, identify and quantitatively evaluate the damage and material defects that occur. Combustion diagnosis technol...

AI Technical Summary

Problems solved by technology

Methane, the main component of natural gas, shows a faint blue color when it is fully and efficiently combusted after premixing. However, the existing combustion diagnosis methods are not enough to support effective detection and analysis of the flame combustion state in this state.

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