磨粒径向分布对电感式磨粒传感器测试结果的影响

根据电感平衡原理,设计了用于磨粒在线测量的电感式磨粒传感器.分析了传感器的测试原理和磨粒通过传感器线圈时径向分布对测试结果的影响.通过计算线圈内测试面的磁场分布,提出了提高线圈测试面磁场均匀性的设计准则.建立了磨粒位置偏离线圈中心时,磨粒磁化场的磁通求解模型.模型计算结果表明,磨粒径向位置的改变,使得线圈各横截面上磁化场的磁通发生了变化.当线圈达到一定长度后,磁化场的磁链变化很小.因此在保证传感器线圈测试面磁场均匀性和线圈长度的前提下,磨粒径向分布对测试结果的影响可忽略.研究结论为分析电感式磨粒传感器测试结果一致性和优化传感器的结构设计提供了理论依据.

Effect of the Radial Distribution of the Wear Debris Position on the Testing Results of Inductive Wear Debris Sensor

According to the inductive balance principle, the on-line inductive wear debris sensor is designed. The testing principle is analyzed. And the effect of the radial distribution of the wear debris in the sensor coil on the testing results is studied. After the magnetic field distribution of test section of the sensor coil computed, the coil structural design criterion is proposed for improving the magnetic field homogenization of test section. The magnetic flux solution model of wear debris magnetizing field is built under the condition of deviation between the wear debris position and the centre of the sensor coil. The calculation results of the model show that the change of the wear debris radial position makes the magnetic flux of coil cross section change. When the length of the coil reaches a certain value, the flux linkage changes very little. So, under the premise of guarantee of the magnetic field homogenization of the coil test section and the length of the coil, the effect of the radial distribution of the wear debris on the testing results can be neglected. Research conclusions provide theoretical basis for analyzing the consistency of testing results and Optimizing structural design of the sensor.