School of Mechanical Engineering, Beijing Institute of Technology, No. 5 South Zhongguancun Street HaiDian District, Beijing 100081, China.
The Ministry of Education Key Laboratory of Modern Measurement and Control Technology, Beijing Information Science and Technology University, No. 12 Xiaoying East Street, HaiDian District, Beijing 100192, China.
Sensors (Basel). 2018 Nov 26;18(12):4144. doi: 10.3390/s18124144.
The electromagnetic wear particles detection sensor has been widely studied due to its ability to monitor the wear status of equipment in real time. To precisely estimate the change of the magnetic energy of the sensor coil caused by the wear particles, the magnetic property models of wear particles under the alternating magnetic field was established. The models consider the hysteresis effect and the eddy current effect of the wear particles. The analysis and experimental results show that with the increase of the effective field frequency, the change of the magnetic energy caused by the wear particles gradually decrease, which makes the induced electromotive force output by the sensor reduce with the decrease of the particle speed, so a signal compensation method is presented to obtain a unified signal when the same wear particle passing through the sensor in different speeds. The magnetic coupling effect between the two adjacent wear particles is analyzed. The result illustrates that the change of the magnetic energy caused by the dual wear particles system is larger than the sum of the energy variation caused by two independent wear particles, and with the increase of the interparticle distance, the magnetic coupling effect gradually weakens and disappears.
电磁磨损颗粒检测传感器因其能够实时监测设备的磨损状态而得到了广泛的研究。为了精确估计传感器线圈因磨损颗粒而引起的磁能变化，建立了磨损颗粒在交变磁场下的磁特性模型。该模型考虑了磨损颗粒的磁滞效应和涡流效应。分析和实验结果表明，随着有效场频率的增加，磨损颗粒引起的磁能变化逐渐减小，这使得传感器输出的感应电动势随颗粒速度的降低而减小，因此提出了一种信号补偿方法，以在不同速度下通过传感器的相同磨损颗粒获得统一的信号。分析了两个相邻磨损颗粒之间的磁耦合效应。结果表明，双磨损颗粒系统引起的磁能变化大于两个独立磨损颗粒引起的能量变化之和，随着颗粒间距离的增加，磁耦合效应逐渐减弱并消失。
