Islam Tarikul, Yousuf Mujeeb, Nauman Mohd
Electrical Engineering Department, Jamia Millia Islamia (Central University), Mohd Ali Jauhar Marg, New Delhi 110025, India.
Mechanical Engineering Department, Jamia Millia Islamia (Central University), Mohd Ali Jauhar Marg, New Delhi 110025, India.
Rev Sci Instrum. 2020 Feb 1;91(2):025005. doi: 10.1063/1.5139925.
The presence of metal particles in lubricating oil produced during the wear and tear of mechanical equipment can harm its performance severely if not detected in time. Hence, the detection of such particles is necessary to predict and to prevent disastrous failures of the machines. This paper presents a new non-contact cross-capacitive sensor for the detection of metal particles in the lubricating oil. The sensor can detect each and every metal debris particle in the lubricating oil by monitoring the capacitance peak. The proposed capacitive sensor works on the principle of the Thompson-Lampard theorem. The sensor consists of four cylindrical electrodes with infinitesimal gaps wrapped around a hollow Teflon tube. The sensor has been modeled with finite element simulation software and then fabricated to verify the theory experimentally. Experimental results show that the capacitance value shows a sharp change in its value due to the presence of metal debris in the oil. The output of the sensor is highly precise (±0.82%) and accurate.
机械设备磨损过程中产生的润滑油中的金属颗粒，如果不及时检测，会严重损害其性能。因此，检测此类颗粒对于预测和防止机器灾难性故障是必要的。本文提出了一种用于检测润滑油中金属颗粒的新型非接触式交叉电容传感器。该传感器通过监测电容峰值能够检测润滑油中的每一个金属碎片颗粒。所提出的电容传感器基于汤普森 - 兰帕德定理工作。该传感器由四个围绕空心聚四氟乙烯管缠绕且间隙极小的圆柱形电极组成。已使用有限元模拟软件对该传感器进行建模，然后制造出来以通过实验验证该理论。实验结果表明，由于油中存在金属碎片，电容值会在其数值上出现急剧变化。该传感器的输出具有高精度（±0.82%）且准确。
