三线圈电感式油液金属磨粒检测系统

Three Coil Inductive Oil Metal Abrasive Particle Detection System

机械传动金属磨粒可以反馈机械设备故障的特性,针对机械传动系统故障在线检测需求,提出了一种三线圈电感式金属磨粒检测系统;通过建立传感器数学模型,对影响传感器金属探测灵敏度的参数进行仿真,结合传感器实际使用情况求出最优解;通过设计励磁信号源模块、调幅模块、信号调理模块等电路并结合上位机对油液中的金属磨粒进行检测;经孔径为8 mm的流道的实验测试,实现了500μm铁磨粒及1 000μm铜磨粒的检测精度;该系统为发动机中金属磨粒的检测提供了技术支持,对故障预防与诊断具有重要意义。

The metal wear debris in mechanical transmission can feedback the characteristics of mechanical equipment failure,aiming at the requirement of online fault detection of mechanical transmission system,a three-coil inductive metal abrasive particle detection system is proposed.By establishing the mathematical model of the sensor,the parameters affecting the metal detection sensitivity of the sensor are simulated,and the optimal solution is obtained combined with the actual use of the sensor.Through the design of excitation signal source module,amplitude modulation module,signal conditioning module and other circuits,combined with the host computer,the metal abrasive particles in the oil are detected.Through the experimental test of the runner with an aperture of 8 mm,this system can achieve the detection accuracy of 500 μm iron abrasive grains and 1 000 μm copper abrasive grains.The system provides technical support for the detection of metal abrasive particles in engine,and is of great significance for fault prevention and diagnosis.