基于高梯度磁场结构电感式油液污染物检测传感器研究  

Research on Inductive Oil Contaminant Detection Sensor Based on High Gradient Magnetic Field Structure

作　　者：白晨朝 汪承杰 王笑天 于爽 张洪朋 李伟[1] 孙玉清[1] 李国宾[1] BAI Chenzhao;WANG Chengjie;WANG Xiaotian;YU Shuang;ZHANG Hongpeng;LI Wei;SUN Yuqing;LI Guobin(School of Marine Engineering,Dalian Maritime University,Dalian 116026)

机构地区：[1]大连海事大学轮机工程学院,大连116026

出　　处：《机械工程学报》2022年第23期98-105,共8页Journal of Mechanical Engineering

基　　金：国家自然科学基金(51679022);辽宁省“兴辽英才计划”项目(XLYC2002074)资助项目。

摘　　要：机械设备油液中不可避免会引入一些污染物,这些污染物会对设备的正常运行造成影响,尤其金属磨粒。在一定程度上,磨粒的属性反映着设备的磨损状态。目前检测磨粒的方法有很多,而电感检测法因结构简单而被广泛应用。传统的电感检测法精度不高,此研究在检测线圈的两侧贴上开有矩形槽的高导磁坡莫合金,可以使磁场向感应区域聚集。先通过仿真对比分析了不同坡莫合金结构的磁场强度,结果表明三角形槽的结构磁场集中但不均匀,矩形开口槽有更高的磁场强度,磁场分布均匀且集中。然后根据仿真结果进行相关实验,结果表明加入矩形槽的坡莫合金后,铁磁性金属颗粒检测信噪比提升20%,检测下限提升至30μm;非铁磁性金颗粒检测信噪比提升70%以上,检测下线提升至100μm,传感器检测精度明显提高。此研究提供了一种高精度电感检测方法来检测油液中的污染物,这对于油系统的寿命诊断和健康监控具有重要意义。Some contaminants will inevitably be introduced into the oil of machinery and equipment, and these contaminants will affect the normal operation of the equipment, especially metal abrasive particles. To a certain extent, the properties of abrasive particles reflect the wear status of the equipment. There are many methods for detecting abrasive particles, and the inductance detection method is widely used because of its simple structure. The accuracy of traditional inductance detection method is not high.In this study, a high-permeability permalloy with rectangular slots is attached to both sides of the detection coil, which can cause the magnetic field to concentrate in the sensing area. First, the magnetic field strength of different permalloy structures is analyzed by simulation. The results show that the magnetic field of the triangular slot structure is concentrated but not uniform, the rectangular opening slot has a higher magnetic field strength, and the magnetic field distribution is uniform and concentrated. Then according to the simulation results, relevant experiments are carried out. The results show that after adding permalloy with rectangular grooves, the signal-to-noise ratio(SNR) of ferromagnetic metal particle detection is increased by 20%, and the lower detection limit is increased to 30 μm;the SNR of non-ferromagnetic gold particles is increased by more than 70%, the detection offline is increased to 100 μm, and the detection accuracy of the sensor is significantly improved. This paper provides a high-precision inductance detection method to detect pollutants in oil, which is of great significance to the life diagnosis and health monitoring of the oil system.

关 键 词：高梯度磁场 油液分析 磨粒检测 微流控芯片 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TH73[自动化与计算机技术—控制科学与工程]