A Method of Correcting Static Deviation of Radiation Energy Signal
A technology of static deviation and radiant energy, applied in the combustion method, the safety device of the combustion chamber, the combustion chamber, etc., can solve the problems of controller malfunction, data distortion, slow change, etc., to achieve high reliability and ensure continuous use. Effect
Active Publication Date: 2015-12-02
WUHAN JIUZHOU 3D COMBUSTION TECH
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Problems solved by technology
Static deviation cannot be identified directly through the image, its change is slow, and the deviation gradually accumulates, which will eventually lead to complete distortion of the data, cause malfunction of the controller, and affect the stability of the radiant energy signal control system
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[0029] Now refer to the accompanying drawings to describe the implementation process of the present invention. The present invention provides a method for correcting the static deviation of the radiant energy signal that accurately reflects the combustion energy level in the furnace required by the different loads of the coal-fired thermal power unit. The process is as follows figure 1 As shown, the steps are:
[0030] First, drive the SDK2000 video acquisition card to complete the acquisition of the flame image, and extract the RGB color information of each pixel. Then use the R value to judge the coking state of the detector, use the correlation coefficient to judge the dust accumulation state of the detector, eliminate the invalid detector signal, count the number and number of effective detectors, extract the radiant energy signal of the effective detector and make a ratio fix. Finally, the radiant energy signals of all effective detectors are averaged and then filtered o...
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The invention provides a method for correcting radiation energy signal static deviation, and belongs to the technical field of boiler combustion monitoring and control of a thermal power plant. Firstly, a video collection card is driven to finish the collection of flame images and extract RGB color information of each pixel point, and the coking state of each detector is judged according to the R value. Secondly, the ash accumulation state of each detector is judged according to a correlation coefficient, the quantity and the serial numbers of effective detectors are counted, and the radiation energy signals of the effective detectors are extracted and are corrected in a ratio mode. Finally, averages of the radiation energy signals of all the effective detectors are obtained and output in a filtering mode. The operation result shows that the radiation energy signals corrected through the method can eliminate radiation energy signal static deviation caused by operation performance variation factors such as ash accumulation, coking and zero wandering of the detectors and ash accumulation and coking of a boiler, radiation energy signals which are high in reliability, accurate and stable are provided, the pulsatility of flames in a hearth can be effectively reflected, and continuous use of a radiation energy control system is guaranteed.
Description
technical field [0001] The invention relates to the technical field of boiler combustion monitoring and control in a thermal power plant, in particular to a method for correcting the static deviation of a radiation energy signal that accurately reflects the combustion energy level in a furnace required by a coal-fired thermal power unit under different loads. Background technique [0002] At present, a radiation imaging-based detection method and technology for the combustion flame radiation signal in the coal-fired boiler furnace of a power station is proposed in the prior art. This technology uses 4-20 high-temperature flame detectors installed on the pulverized coal-fired boiler, continuously The flame image in the furnace was taken, and the combustion radiant energy signal was extracted from it for optimal combustion control of thermal power units, and a certain control effect was achieved. Zhou Huaichun, Lou Xinsheng, Yin Heling, etc. Simulation Research" (Chinese Journ...
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IPC IPC(8): F23M11/04F23N5/00
Inventor 张向宇唐文刘珠伟周怀春
Owner WUHAN JIUZHOU 3D COMBUSTION TECH