Method and device for detecting pollution degree of lubricating oil

Abstract

The invention provides a method and device for inspecting the degree of contamination of the lubricant, the method of which comprises: make the lubricant speckle mapping; make imaging to the above mapping by camera; transform the above mapping image to gray level image; measure the gray value A of the diffusion ring, the gray value B of the aggradation ring, the gray value C of the oil control ring and the gray value D of the filter paper in the above gray level image, as well as measure the diameter E of the diffusion ring and the diameter F of the oil control ring; calculate the three values of the measurement parameters Alpha, Sd and Wd which reflects the degree of contamination of the lubricant according to the above gray values and diameters, wherein, the Alpha is equal to F / E, Sd is equal to LgB-LgA and the Wd is equal to LgD-LgC; determine the degree of contamination of the lubricant based on the values of the Alpha, Sd and Wd. The device provided in the invention comprises a plainstage, imaging unit, image processing unit, calculating unit and display unit. The method and device for inspecting the degree of contamination of the lubricant provided in the invention has the advantages of fast processing speed and high precision measurement.

Description

technical field [0001] The invention relates to a method and a device for detecting the pollution degree of lubricating oil, in particular to a method and a device for detecting the pollution degree of lubricating oil of an internal combustion engine. Background technique [0002] It is very important to determine the oil change period of lubricating oil such as diesel engines during the navigation of modern ships. Too late oil change will accelerate mechanical wear and cause major accidents, and early oil change will cause waste of lubricating oil. In order to detect the problems in the lubricating oil in time, reduce wear, prolong the life of the machine, improve the use effect of the lubricating oil, and avoid catastrophic equipment accidents, it is necessary to quickly and accurately detect the change of the lubricating oil during use, that is, the lubricating oil is polluted environment (containing wear particles and sludge from deep oxidation) and the detergency and di...

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: the first is that the measurement accuracy is poor

This is mainly because the three rings of the lubricating oil spot cannot be the standard three rings, so it is difficult to accurately measure the diameter and area of ​​each ring with the naked eye and a ruler, and it is also difficult to accurately judge the color with the naked eye. The depth value of the judgment will vary from person to person

Second, it is difficult to grasp the best observation time

In addition, there are many varieties of lubricating oil, so the detection work of lubricating oil is more cumbersome and inconvenient to manage

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