设计一种应用于旋转机械油路检测系统的在线式油路磨粒传感器,其性能直接影响油路检测系统的监测结果。重点对传感器检测原理和结构特性等进行定性分析,根据电磁场原理和毕奥-萨伐尔定律等电磁学理论,推导并建立平衡线圈磁场分布数学模型以及传感器输出模型,研究影响传感器输出和磁场分布的几大因数,最后利用电磁场仿真软件对传感器平衡结构线圈的磁场分布进行仿真,为传感器的设计、优化改进提供了重要的理论依据。 A kind of on-line oil particle sensor which is applied to the detection system of rotating machinery oil passage is designed. Its performance directly affects the monitoring result of the oil passage detection system. Based on the theory of electromagnetic field and Biot-Savart law, the mathematical model of the magnetic field distribution of the balance coil and the sensor output model are derived and established to study the influence of the sensor output and the magnetic field distribution Finally, the electromagnetic field simulation software is used to simulate the magnetic field distribution of the sensor balanced structure coil, which provides an important theoretical basis for the design, optimization and improvement of the sensor.