The physical and chemical quality of lubricating engine oil in the IC engine must be tracked regularly to obtain optimum execution and maintain an engine life and carbon footprint. Routine condition monitoring of engine oil requires costly research testing facility by highly skilled investigators. Various methods can check the concentration of the impurities in engine oil, but some drawbacks exist in already existing methods. An optical fiber-based photon measurement method is utilized in this paper. Our work presents the implementation of optical fiber with white light (WL) based spectrophotometer for continuous monitoring of degradation in engine oil. The optical absorbance of photons in engine oil relating to impurities is estimated by utilizing a photodetector sensor. Experimental results show the designed device provides a trustworthy method of detecting the sludge level in engine oil. Therefore, developed spectrophotometer has potential value in engine oil quality monitoring.
Experimental realization of a fiber Bragg grating-based compact, high-sensitive, and fully packaged single-axis accelerometer has been demonstrated. To verify experimentally observed results, simulation has been carried out for the performance comparison of packaged single-axis accelerometer with the cantilever of various materials. The experimental demonstrations have been conducted at unknown seismic vibrations of random frequencies as well as the vibrations of known frequencies. The experimental results for the reported seismic events (i.e., footprint and hammering) demonstrate that the developed fully packaged accelerometer possesses good response to the signals with random vibrations. The developed accelerometer holds a high sensitivity up to 88 pm/g in the broad bandwidth. Such a compact fully packaged accelerometer with improved sensitivity can be deployed at any civil engineering structures, such as highways, bridges, dams, tunnels, pipelines, and aeronautical platforms for broadband dynamic monitoring of the random vibrations ranging from 5 to 100 Hz.
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