油液磨粒分析在机械设备状态评估、故障诊断等方面具有重要意义。当前仍缺乏方便、可靠的非铁磁磨粒检测技术。基于申请人发现的油水界面上磨粒电动运动速度与磨粒密度有关的实验现象，本项目提出将油样铺于水面，施加平行油水界面的直流电场，利用水的电渗流动来输运界面上的磨粒，实现磨粒密度、尺寸和个数的测定。主要内容有：1）全面测量典型非铁磁磨粒界面电动运动速度，为全面掌握磨粒运动行为提供实验依据；2）测量油水界面zeta电势以及界面磨粒的表面电荷、接触角、下沉深度等参数，确定界面形变轮廓随磨粒密度变化关系，为建立磨粒运动控制模型提供所需参数；3）建立考虑界面形变在内的磨粒运动方程，数值模拟分析磨粒密度和诱导电渗流对其运动速度及其周围流场的影响规律并进行实验验证； 4）微通道内，基于磨粒导致检测区水膜电阻变化原理，实现磨粒的区分检测、计数和尺寸判定。通过上述研究，为发展新型油液非铁磁磨粒分析技术奠定基础。

Oil debris analysis is significant for assessing the working status and performing fault analysis of an oil-lubricated mechanical system. Currently, there is still lack of simple and reliable non-ferrous debris analysis technologies. Based on the draft experimental results on the relationship between the electrokinetic moving velocities and its densities of non-ferrous debris located at an oil-water interface, we propose to transport and analyze oil debris by putting the to-be-analyzed oil sample onto pure water and applying a DC electric field. In this way, the electroosmotic flow of pure water will carry the debris at the oil-water interface move forwards. During this process, debris density detection, counting and sing the debris are achieved. The main contents include: 1) comprehensively measure the moving velocities of various kinds of non-ferrous debris, aiming to provide direct experimental observations for the theoretical analysis; 2) measure the zeta potential of oil-water interface and the surface charge, contact angle and the sinking height of a debris at the interface, aiming to determine the dependence of the interface profile on debris density and provide the necessary parameters for numerical simulations; 3) build up the governing equations for the debris movement with the deformed interface effects included and numerically analyze and experimentally verify the influence the debris density and induced charge electrokinetic flow on debris movement and the flow fields around the debris; 4) detect, count and sizing the debris based on the resistive pulse sensing principle with a deformed oil-water interface. In a word, the fundamental researches proposed to be done are to provide reference for the development and application of this novel electrical oil debris analysis method.