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A Method of Measuring the Temperature of Hydrocarbon Flame Based on Color CCD Camera

A flame temperature and measurement method technology, applied in the field of hydrocarbon flame temperature measurement based on color CCD camera, hydrocarbon fuel flame temperature measurement, can solve the problems of complicated operation, application, and increased measurement cost, and achieve a wide temperature range, The effect of good economy and simple experimental steps

Active Publication Date: 2019-05-07
ZHEJIANG UNIV
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Problems solved by technology

[0005] Some temperature measurement methods use optical filters to measure the intensity of monochromatic radiation at different wavelengths (Guo H, Castillo JA, Sunderland P B.Digital camera measurements of soot temperature and sootvolume fraction in axial flames[J].Applied optics,2013, 52(33):8040-8047.), multiple measurements are required, but the flame images obtained by multiple shootings may not be exactly the same, which will bring great trouble to the later data processing, and if the flame occurs during the measurement process If there is no disturbance, the error of the experimental results will be large
[0006] The Chinese patent document with the notification number CN101403639A discloses a temperature image and blackness image detection method of a hydrocarbon flame. The relationship between the flame temperature and the primary color intensity ratio is obtained through blackbody furnace calibration and fitting. However, the blackbody furnace can use The temperature range is small. When the flame temperature is beyond the temperature range of the blackbody furnace, its method cannot prove that the fitting results are still applicable. In addition, the use of the blackbody furnace increases the measurement cost and complicates the operation.
At present, there is no temperature measurement method based on CCD camera that overcomes the above problems at home and abroad.

Method used

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  • A Method of Measuring the Temperature of Hydrocarbon Flame Based on Color CCD Camera
  • A Method of Measuring the Temperature of Hydrocarbon Flame Based on Color CCD Camera
  • A Method of Measuring the Temperature of Hydrocarbon Flame Based on Color CCD Camera

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[0035] A stable ethylene / air diffusion flame is generated by the burner, and the ethylene and air flow rates are set to 0.231L / min and 42.78L / min respectively. The burner is a Santoro burner, the inner diameter of the gas channel is 11.1mm, and the inner diameter of the external air channel is 101.6mm. The obtained flame visible height is about 88mm.

[0036] The color CCD camera 2 used for temperature measurement is a Nikon D700 SLR camera. Set the white balance of the color CCD camera 2 to Direct sunlight, set all photo processing options such as contrast, color, and saturation to "normal" or "none", and set the ISO value to the minimum value of 200. In the Spotlight software, check whether the intensity of the R, G, and B channels of the captured photo is saturated, and set the shutter time and exposure compensation of the camera reasonably according to the saturation. The color CCD camera 2 is controlled by the software Camera Control Pro in the computer 3 for remote sho...

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Abstract

The invention discloses a method for measuring the temperature of a hydrocarbon flame based on a colored CCD camera. According to the method, the temperature measurement range of a measured object is not limited by a blackbody furnace calibration experiment, and a blackbody furnace is not used. The method comprises the following steps: (1) photographing the hydrocarbon flame, namely setting parameters of the colored CCD camera, and photographing the flame; (2) acquiring a relation curve between the temperature and a specific value of original strengths of two base colors, namely acquiring a relation curve between the temperature and a specific value of the original strengths recorded by channels R, G and B; (3) acquiring R, G and B true color images, namely outputting RAW format images from the colored CCD camera, and finally converting the RAW format images into the R, G and B true color images; (4) acquiring a specific value of the two base colors, namely acquiring the original strengths of the three channels R, G and B from the R, G and B true color images, and calculating the specific value of the original strengths of the optional two base colors; and (5) acquiring the temperature, namely acquiring the temperature of the hydrocarbon flame according to the obtained relation curve between the temperature and the specific value of the original strengths of the two base colors.

Description

technical field [0001] The invention relates to a method for measuring the temperature of a hydrocarbon flame, in particular to a method for measuring the temperature of a hydrocarbon flame based on a color CCD camera, which is suitable for measuring the temperature of a hydrocarbon fuel flame. Background technique [0002] The hydrocarbon flame temperature is an important parameter of the combustion process. The qualitative and quantitative measurement of temperature plays an important guiding role in observing and understanding the soot production and oxidation process, establishing a suitable combustion model, and realizing efficient and clean combustion. [0003] Temperature measurement methods are divided into contact temperature measurement methods and non-contact temperature measurement methods. The two-color method temperature measurement based on the digital image taken by the CCD camera is a non-contact measurement method, which will not destroy the target tempera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J5/60
CPCG01J5/0018G01J5/60
Inventor 陈玲红吴学成岑可法吴建周剑武
Owner ZHEJIANG UNIV
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