润滑油金属磨粒传感器设计及试验研究

Design and Experimental Study of Metal Particle Sensors for Lubricating Oils

根据电磁感应原理提出一种润滑油金属磨粒传感器模型,并对金属磨粒传感器的基本结构和检测电路进行设计。在传感器测试试验台上对传感器检测抗磁性磨粒和铁磁性磨粒的能力进行测试,研究电压、温度对传感器的影响。测试结果显示:传感器可以准确判别润滑油内的铁磨粒和铜磨粒,其中铁磨粒和铜磨粒的最小检测直径分别为200μm和500μm;在3~5 V电压下该传感器的输出特性稳定;在20~60℃温度范围,温度对传感器的影响可忽略,传感器测量精度满足要求。

A model of metal wear debris sensor for lubricating oil was presented based on the principle of electromagnetic induction, and the basic structure and detection circuit of metal abrasive sensor were designed.The ability of the sensor to detect the anti-magnetic abrasive grains and ferromagnetic abrasive grains was tested on the sensor test bench, and the influence of voltage and temperature on the sensor was studied.The test results show that the sensor can accurately distinguish the iron abrasivegrains and copper abrasive grains in the lubricating oil.The minimum detection diameters of the iron and copper abrasive grains are 200 μm and 500 μm respectively.The output characteristic of the sensor is stable in the voltage range of 3 V to 5 V, and the effect of temperature on the sensor can be ignored accuracy and the measurement can meet the requirements in the temperature range of 20 ℃ to 60 ℃.