Novel Method for the Detection of Multi-contaminants in Marine Lubricants
ZENG Lin1, ZHANG Hongpeng1, TENG Huaibo1, ZHANG Xingming2
1. Marine Engineering College, Dalian Maritime University, Dalian 116026; 2. School of Naval Architecture and Ocean Engineering, Harbin Institute of Technology, Weihai 264209
Abstract：A novel method based on a microfluidic chip is presented for the detection of multi-contaminations in marine lubricants. The sensor designed using this method consists of a straight microchannel and two single-layer coils, which can detect not only ferromagnetic and non-ferromagnetic particles in oil as an inductive sensor but also water droplets and air bubbles in oil as a capacitive sensor. Compare with the conventional single coil inductive sensor, the double-coil sensor not only detects two kinds of parameters but also offers higher resolution. The method is simulated and analyzed from the detection principle. Then the sensor is used to build a detection system to detect the multi-contaminations in the oil. In the experiments, we detected 40 μm iron particles and 110 μm copper particles successfully. Meanwhile, as a capacitive sensor, we are able to detected 100 μm water droplets and 180 μm bubbles in oil. This study is expected to provide supports for the rapid detection of multi-contaminants in marine lubricants, which is of great significance for the prevention and diagnosis of marine mechanical system faults.
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