5/7/2023 0 Comments Fotonica led![]() ![]() It is possible to dramatically improve the performance, reliability, and maintainability of vehicles and other similarly complex equipment if improved sensing and diagnostics systems are available. CR and TCI gave clearer indication of oil degradation than key monitoring parameters like TAN and were found to be effective criteria for characterizing the degradation of hydraulic mineral oils. Furthermore, results agreed with those of viscometry, total acid number (TAN), and UV-VIS photospectrometry. TCI depended on both chemical degradation and particulate contaminants in oil, being most sensitive in the blue wavelength range and least in the green. CR was found to be independent of the particulate contaminants of oil, but dependent on chemical degradation. Test results showed that CR corroborated CIE chromaticity ( X - Y Coordinates) and increased with oil degradation unlike Saturation S and Hue H. The device, a deviation from conventional electrical, mechanical, and electrochemical techniques, uses color ratio (CR) and total contamination index (TCI) parameters based on transmitted light intensity in RGB wavelengths for oil condition monitoring. To perform these tasks an algorithm and application software have been developed and loaded into the flash memory of the microcontroller.Ī low cost, compact, real-time, and quick measurement optical device based on the absorbance of white light, which comprised of photodiodes in a 3-element color-sensor, feedback diodes, water and temperature sensing element, and so on, was developed and tested in low absorption mineral oil. In addition to revealing of lube oil color, it can also detect the size of the particles in the lubricant oil. ![]() Apart from this, an additional sensor is provided to measure the turbidity of the lubricant oil, which helps in compensating the error in color scale due to turbidity. ![]() In the studies conducted at the laboratory, this color scale corresponds to the sensor output frequency in the range of 76.87 kHz-61.63 kHz.The sensitivity of the color sensor is 1905Hz/Color code. As per the ASTM D1500 standard, the color scale of lubricant oil varies from 0.5 to 8.0. The developed instrument reads the sensor output, displays the condition of lubricant oil on LCD, announces the alarm to alert the operator and communicates the healthiness of lubricant oil to the computer. This paper presents the design and development of a low cost, high precision quasi-digital sensor with an opto-resistive technique to detect the color of lubricant oil with a microcontroller( PIC18F4550) based instrument. It is a crucial parameter to cognize the healthiness of lubricant oil. In rotating machinery, the color of lubricant oil changes due to oxidation, degradation and contamination. ![]()
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