电阻式微螺线管型磨粒传感器仿真与实验研究

发布时间：2018-05-24 22:34

本文选题：微螺线管 + 传感器　；参考：《大连海事大学》2017年硕士论文

【摘要】：随着工业的快速发展,液压技术广泛应用于大型工程机械,航空设备,船舶机械等领域;液压控制要求的不断提高,对液压系统中油液清洁程度也更加严格。据统计分析,液压系统机械故障中70%以上由液压油中金属磨粒污染物引起。油液污染物分析诊断技术已成为设备系统状态监测及故障诊断的重要手段。本文在电感法检测液压油中金属颗粒的基础上,进一步研究电阻法,具体研究内容如下:研究微螺线管内部磁场分布特征,建立铁磁性金属颗粒在微螺线管中的磁化模型,金属颗粒内部电涡流影响微螺线管阻抗的数学模型。理论研究表明,金属颗粒的磁化场使微螺线管的等效电感发生变化,而电涡流磁场使微螺线管的等效电感和电阻同时发生变化。采用COMSOL有限元分析软件,对微螺线管内部磁场分布特征进行仿真;研究微螺线管参数,金属颗粒因素及激励信号对微螺线管型磨粒传感器等效电阻变化值的影响,确定了各项参数与微螺线管磨粒传感器等效电阻变化值之间的关系。设计实验系统,制作实验用磨粒传感器。结合仿真结果,实验研究传感器参数,金属颗粒及激励源等因素对微螺线管型磨粒传感器电阻变化输出的影响,验证了仿真结果的准确性。同时,实验结果表明采用电阻法检测非铁磁性金属颗粒效果相对于电感法更好,有更高的信噪比和更低的检测下限。
[Abstract]:With the rapid development of industry, hydraulic technology is widely used in large-scale construction machinery, aviation equipment, ship machinery and other fields. According to statistical analysis, more than 70% of mechanical faults in hydraulic system are caused by contaminants of metal abrasive particles in hydraulic oil. Oil pollutant analysis and diagnosis technology has become an important means of equipment system condition monitoring and fault diagnosis. On the basis of the inductance method to detect metal particles in hydraulic oil, the resistance method is further studied in this paper. The specific research contents are as follows: the magnetic field distribution characteristics of microsolenoid are studied, and the magnetization model of ferromagnetic metal particles in microsolenoid is established. A mathematical model of the effect of eddy current on the impedance of microsolenoid in metal particles. Theoretical study shows that the magnetization field of metal particles changes the equivalent inductance of the micro-solenoid, while the eddy current magnetic field changes the equivalent inductance and resistance of the micro-solenoid at the same time. COMSOL finite element analysis software was used to simulate the magnetic field distribution in the micro-solenoid, and the effects of the parameters of the micro-solenoid, the metal particle factor and the excitation signal on the equivalent resistance of the micro-solenoid wear particle sensor were studied. The relationship between the parameters and the equivalent resistance of the microsolenoid abrasive particle sensor is determined. The experiment system is designed and the wear particle sensor for experiment is made. Based on the simulation results, the effects of sensor parameters, metal particles and excitation sources on the resistance output of the micro-solenoid wear particle sensor are studied, and the accuracy of the simulation results is verified. At the same time, the experimental results show that the resistance method is more effective than the inductance method in detecting non-ferromagnetic metal particles, with higher signal-to-noise ratio and lower detection limit.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP212

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