A detection method for particle motion in gas-solid flow field of circulating fluidized bed boiler
A circulating fluidized bed and particle movement technology, applied in fluid velocity measurement, measurement devices, velocity/acceleration/impact measurement, etc., can solve problems such as poor robustness, calculation vector diagram error, wrong velocity vector, etc., to improve quality , improve stability and smooth flow field
Active Publication Date: 2017-04-19
NINGBO UNIV
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
When the existing methods deal with the gas-solid flow field of circulating fluidized bed boilers, due to the characteristics of particle activity in the fluidized bed furnace, it is often difficult to obtain the ideal particle velocity field distribution through post-image processing. When there is interference in the imaging, it will make There are errors or even errors when calculating the vector diagram, and there are many wrong velocity vectors, which have poor robustness
In addition, in the current research on the detection of particle motion velocity in the gas-solid flow field of a fluidized bed, the vector diagram obtained by applying the existing image processing algorithm is directly used as the final result without further processing and analysis of the vector diagram, which will lead to When the error itself exists objectively, the continuity of particle motion tracking is poor
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0023] For the particle motion detection method in the gas-solid flow field of a circulating fluidized bed boiler provided in this example, see figure 1 , which includes the following steps:
[0024] Step 1: Collect video images of particles moving in the gas-solid flow field of the circulating fluidized bed boiler;
[0025] Step 2: Preprocessing the video image collected in step 1: using Gaussian smoothing algorithm to filter and denoise the video image collected in step 1;
[0026] Step 3: sharpen the video image after filtering and denoising to improve the contrast of the image;
[0027] Step 4: converting the sharpened video image into a grayscale video image;
[0028] Step 5: using the optical flow method to process the grayscale video image to obtain a motion vector image, the optical flow method is a conventional method in the prior ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a circulating fluidized bed boiler gas-solid flow field particle moving speed detection method, which is characterized by comprising the following steps that 1, video images for gas-solid flow field particle movement of a circulating fluidized bed boiler are collected; 2, the video images are preprocessed; 3, the preprocessed video images are subjected to sharpening processing; 4, the video images subjected to sharpening processing are converted into grayscale video images; 5, an optical flow method is used for processing the grayscale video images to obtain a movement vector image; 6, the movement vector image is divided into lattice regions with different sizes; 7, the final movement vector of a certain lattice region is calculated; 8, the step 7 is repeated until the whole movement vector image is traversed; 9, particle movement vector data in the video image is output. Compared with the prior art, the method provided by the invention has the advantages of high stability and high accuracy.
Description
technical field [0001] The invention relates to a particle motion detection method in a gas-solid flow field of a circulating fluidized bed boiler. Background technique [0002] In recent years, circulating fluidized bed has developed rapidly as an efficient and clean combustion technology, and circulating fluidized bed boiler has been considered as the most feasible clean coal combustion technology in my country at this stage. With the development of large-scale and high-parameterized circulating fluidized bed units, the study of gas-solid flow characteristics in the furnace is one of the key issues in the development of this technology. [0003] With the continuous development of fluidized bed technology, it can be found that there are still obvious deficiencies in the existing experimental research and numerical simulation work on the gas-solid two-phase characteristics in the furnace. For the research on the influence of gas-solid flow distribution in the local area of ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/20G01P5/00
CPCG01P5/00G06T2207/10016
Inventor 李潇葛英辉余建军
Owner NINGBO UNIV