Method for determination of detergency and dispersibility of engine oil

Abstract

The invention discloses a method for measuring the cleanness and dispersibility of engine oil: step 1: outline the diffusion ring and the oil ring on the oil spot; step 2: collect the grayscale image f of the oil spot and input it into a computer; step 3: The gray value of each pixel in the grayscale image is calculated to obtain the boundary map B of the diffusion ring and the oil ring; Step 4: Obtain the marker map L of the diffusion ring and the oil ring; Step 5: Calculate the area Sk of the diffusion ring area and the oil The area Sy of the ring area; step 6: use the following formula to calculate the clean dispersion coefficient of the oil. The quality of the engine oil can be quickly judged by the detergency dispersibility coefficient. The larger the detergency dispersibility coefficient, the better the quality of the engine oil; the smaller the detergency dispersibility coefficient, the poor quality of the engine oil. The method of the invention is simple in calculation, high in calculation accuracy and short in running time, and is suitable for use in real-time systems.

Description

Technical field [0001] The invention belongs to the technical field of computer image processing, and specifically relates to a method for determining the cleanness and dispersion of engine oil. Background technique [0002] The lubricating oil in the engine (ie 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 engine working hours, the oxidation at high temperature, the wear products of mechanical parts, the fuel during use and the mixing of moisture, etc., all cause the lubricating oil to be contaminated, resulting in a decline in oil quality and even loss of lubricating oil efficiency . Therefore, monitoring the state of lubricating oil can not only detect changes in the quality of lubricating oil in time, change the lubricating oil as needed, and reduce operating costs; it can also predict the technical ...

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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