Method for determining detergency and dispersibility of engine oil

Abstract

The invention discloses a method for determining detergency and dispersibility of engine oil. The method comprises the following steps: step one, drawing the outlines of a diffusion ring and an oil ring on an oil spot; step two, acquiring a gray level image f of the oil spot and inputting the image f into a computer; step three, computing gray level values of pixel points of the gray level image to obtain a boundary graph B of the diffusion ring and the oil ring; step four, acquiring a mark graph L of the diffusion ring and the oil ring; and step five, computing the area Sk of a diffusion ring zone and the area Sy of an oil ring zone; step six, computing the detergency and dispersibility coefficient of the oil according to the formula shown in the specification. The quality of the engine oil can be fast judged according to the detergency and dispersibility coefficient, and the greater the detergency and dispersibility coefficient is, the better the quality of the engine oil is while the smaller the dispersibility coefficient is, the worse the quality of the engine oil is. The method disclosed by the invention is simple in computation, high in computation precision, short in running time and suitable for a real-time system.

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 cleanness and dispersibility of engine oil. Background technique [0002] The lubricating oil in the engine (that is, the engine oil) has the functions of cooling, lubricating, sealing, anti-corrosion, cleaning, etc. The quality of the lubricating oil directly affects the working performance and life of the engine. With the continuation of the working time of the engine, the oxidation at high temperature, the wear products of mechanical parts, the mixing of fuel oil and water during use, etc., will cause the lubricating oil to be polluted, resulting in a decline in oil quality and even loss of lubricating oil effectiveness. . Therefore, monitoring the state of the lubricating oil can not only detect changes in the quality of the lubricating oil in time, replace the lubricating oil as needed, and reduce operating costs; but...

AI Technical Summary

Problems solved by technology

[0004] The traditional artificial ruler method has the following problems: one is that the measurement accuracy is not high

Since neither the diffusion ring nor the oil ring is a standard circle in actual operation, and the centroids of the two rings generally do not coincide, the measured diameters of the diffusion ring and the oil ring are prone to errors, resulting in low measurement accuracy; the second is to measure The process is time-consuming and laborious. In order to improve the accuracy, multiple measurements are often required. The average value of multiple measurements is taken as the diameter value. Even multiple measurements cannot guarantee the accuracy of the measurement.

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