船舶液压油水分含量检测新方法

在船舶工程领域，液压系统被广泛应用。为了实现液压油中水分含量的快速检测，基于介电常数原理设计制作了一种电容式微流控检测芯片，并在所搭建的检测系统上进行了不同含水量油样的检测实验。实验数据表明：随着油液中水分含量的增加，电容信号幅值逐步增大且符合二次关系。当含水量增大8倍时，油样与空气和油样与净油电容值之差的信号幅值分别约增大2倍和6.9倍。在含水量为50μl时，油样与空气电容值之差约为油样与净油电容值之差的6.5倍。实验结果表明电容法可以应用在液压油水分含量的检测中，而且拥有良好的检测效果。

Research on a new method of measuring moisture content in marine hydraulic oil

Hydraulic system is widely used in the field of ship engineering. In order to achieve the rapid detection of moisture content in oil. A capacitive microfluidic chip was designed and fabricated based on the principle of dielectric constant. An experiment of oil samples with different moisture content was carried out on the detection system. The experiment data show that the values of capacitance change increase gradually with the increasing of moisture content in oil and correspond to the square relation. When the moisture content increases 8 times, the capacitance values difference between the oil sample and the air and the pure oil increases about 2 and 6.9 times respectively. When the moisture content equals to 50ul, the capacitance values difference between oil sample and air is about 6.5 times than that in oil sample and pure oil. The results indicate that the method of capacitance detection can be used in the experiment and has a good effect.