液压阀电涡流位移传感器的研究

检测液压阀芯位移的耐高压差动变压器式位移传感器频响低,不能满足高频响液压阀的需要,电涡流位移传感器不耐高压,且温度漂移严重难以在液压阀中使用,提出一种新型耐高压电涡流位移传感器的结构,建立了数学模型,进行了理论分析和磁场有限元仿真工具进行了仿真;理论分析和实验结果表明:该位移传感器具有良好的线性、工作量程大,可有效应用于高压环境下阀芯的位置检测。

Research on eddy current displacement sensor for electrohydraulic valves

Owing to either the low frequency responses of LVDT for position detection of electrohydraulic valve spools or the incapability of working under high pressure and severe temperature drift of eddy current sensors, a new high-pressure eddy current displacement sensor is presented. Theoretical analysis and magnetic field simulation based on finite element method is given. Both the simulation and experimental results show that the sensor has good linearity, wide operating range, and can be suitable for detecting the position of spools under high pressure.