A quantitative determination method for the detergency and dispersibility of automobile engine oil based on multi-source information fusion
A multi-source information fusion, clean and decentralized technology, applied in the direction of measurement devices, analysis materials, image analysis, etc., can solve the problems of subjective judgment error, low measurement accuracy, time waste, etc.
Inactive Publication Date: 2017-08-25
CHANGAN UNIV
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However, since the oil halo is not a standard circle and the boundary is jagged, the measurement accuracy is not high when measuring the diameter with the manual ruler method. In order to reduce the measurement error, it is necessary to take the average value of multiple measurements, which will cause waste of time
Moreover, according to the judgment method of the national standard, the quality of quiet dispersion is not only determined by the diameter of the diffusion ring, but also related to the color of the sedimentation ring. Judging only by the diameter ratio of the diffusion ring and the oil ring, it will inevitably be generate error
However, the current national standard is that there are subjective judgment errors in both the visual inspection of the color of the precipitation ring and the measurement of the diameter of the halo ring
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Embodiment 1
[0138] refer to figure 1 , the assay method of a kind of engine oil detergency dispersibility that present embodiment provides, comprises the following steps:
[0139] Step S1: The color image f of the oil spot collected by the camera has a size of 335×320, and (R(x,y), G(x,y), B(x,y)) represent R, G and B component values, 1≤x≤335, 1≤y≤320, both x and y are integers. color image f as figure 2 shown.
[0140] Step S2: Convert the oil spot color image to HSV color space.
[0141] Step S3: Oil Ring Segmentation
[0142] The H component of the oil spot is as image 3 As shown, the segmentation of the initial image of the oil ring is as follows:
[0143]
[0144] Among them, I is the initial image of the oil ring, which is a binary image of 0 and 1, and I(x,y)=1 indicates that the pixel (x,y) is a possible oil ring area; H(x,y) is the oil spot HSV Chroma value of color image pixel (x, y); B h is the average chromaticity value of the non-oil ring; Y h is the average ch...
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The invention discloses a method for quantitatively measuring the cleanness and dispersibility of automobile engine oil with multi-source information fusion, comprising the following steps: collecting a color image of oil spots; Segment the oil ring on the HSV color image of the spot to obtain the initial image of the oil ring; perform post-processing on the initial image of the oil ring to obtain the oil ring image; divide the HSV color image of the oil spot to obtain the initial image of the diffusion ring; The map is post-processed to obtain a diffusion ring map; the sedimentation ring detection is carried out on the oil spot HSV color map to obtain a preliminary map of the sedimentation ring; the initial map of the sedimentation ring is post-processed to obtain a sedimentation ring map; Precipitation ring diagram, calculate the proportion of the diameter of the diffusion ring; calculate the proportion of the brightness difference of the sedimentation ring according to the oil spot HSV color map; calculate the clean dispersibility of the oil according to the proportion of the diameter of the diffusion ring and the proportion of the brightness difference of the sedimentation ring. The invention can quickly and quantitatively measure the quiet dispersibility of high-precision engine oil.
Description
technical field [0001] The invention belongs to the technical field of computer image processing, and in particular relates to a method for measuring the detergency and dispersibility of automobile engine oil by fusing multi-source image information. Background technique [0002] The engine is the heart of the car and an important guarantee for the normal operation of the car. The cleanliness and dispersibility of engine lubricating oil is one of the important performance indicators of engine oil. It refers to the ability to inhibit the formation of carbon deposits, oil film and sludge, or to flush the formed deposits into the lubricating oil to remove them. The engine oil should be Has good cleansing and dispersing properties. [0003] According to the requirements of Appendix A of the national standard GB / T 7607-1987 "Internal Combustion Engine Oil Filter Paper Spot Test Method", the method for rapid on-site determination of engine oil cleanliness and dispersibility is th...
Claims
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IPC IPC(8): G01N21/84G06T7/187
Inventor 肖梅司利云张慧铭
Owner CHANGAN UNIV