【作者】 王强； 张洪朋； 张剑锋； 孙玉清； 陈海泉；

【Author】 WANG Qiang;ZHANG Hong-peng;ZHANG Jian-feng;SUN Yu-qing;CHEN Hai-quan;Marine Engineering College,Dalian Maritime University;

【机构】 大连海事大学轮机工程学院；

【摘要】 为了提高微流体油液检测芯片对非铁磁性金属颗粒(铜)的检测精度和灵敏度,本文在电感法检测法的基础上提出了电阻检测法,并对检测芯片的电阻信号输出规律进行研究。介绍了电感法的检测原理及其检测缺陷,制作了实验用检测芯片并设计了检测系统。最后,实验分析了微流体油液检测芯片电阻信号输出规律。实验显示:检测80μm以下的铜颗粒时,电阻法的检测精度高于电感法;检测芯片其他参数不变,电感线圈匝数为800匝时,线圈电阻变化量为0.2093Ω;微流道直径为230μm时,线圈电阻变化量为0.1857Ω。油液中铜颗粒粒径小于80μm时,电阻法检测精度高于电感法;芯片中电感线圈匝数与电阻变化量呈线性关系,流道直径与电阻变化量同样为线性关系。更多还原

【Abstract】 To improve the measuring accuracy and sensitivity of a microfluidic oil detection chip in detecting the non-ferrous metallic debris in oil,this paper presents a resistance analysis method based on the inductive analysis method adopted in previous measurement.Then it researches the resistance signal output characteristics of the detection chip.The principle and defects of the inductive analysis method are introduced.The detection chip and detection system are designed.Finally,the resistance signal output characteristic of microfluidic oil detection chip is analyzed on the basis of experiments.The experimental results show that the detection accuracy of the proposed method is higher than that of the resistance analysis method when copper particles have the size under 80μm.The resistance change is 0.209 3Ω with the inductance coil of 800 turns when the other parameters are constant.Moreorer,The resistance change of coil is 0.185 7Ω when the micro-channel has a diameter of 230μm.In respect of detecting copper particles with a size under 80μm,the accuracy of resistance analysis method is higher than that of the inductive analysis method.Meanwhile,there is a linear relationship between the resistance change and the inductance coil turns of chip,and the same is true for the relationship between the channel diameter and the resistance variation.更多还原