液压阀用位移传感器检测电路设计与分析  

Design and Analysis for Displacement Sensor Detection Circuit of Electrohydraulic Valve

作　　者：王晓虎[1] 李斌[1] 权龙[1] 黄家海[1] 

机构地区：[1]太原理工大学机械工程学院,山西太原030024

出　　处：《液压与气动》2017年第5期89-93,共5页Chinese Hydraulics & Pneumatics

基　　金：山西省科技攻关资助项目(20140313006-7)

摘　　要：针对液压系统中阀芯位移需实时检测的设计要求,设计了一种基于分离元件的液压阀用位移传感器检测电路,并详细分析了正弦发生模块和解调模块的工作原理,然后将该电路与采用集成芯片AD698搭建的检测电路在线性度、滞环、输出电压的阶跃响应、正弦跟随特性以及稳定性方面进行了实验对比。实验表明,使用分离元件搭建的检测电路在动静态性能方面略差于采用集成芯片搭建的检测电路,但电路成本低,温度稳定性良好。According to the real-time design requirement of spool displacement in hydraulic system, a new sensor detecting circuit based on discrete component is designed. Then the study makes a concrete analysis of the sine sig- nal generator and the demodulation module. We compare this circuit with the circuit based on AD698 chip in line- arity, hysteresis, step response of output voltage, characteristics of sine wave and stability. Experimental results show that the sensor conditioning circuit based on AD698 chip has a higher performance in static and dynamic as- pects, but with low cost and good temperature stability.

关 键 词：液压阀 位移检测 分离元件 检测电路 

分 类 号：TH137[机械工程—机械制造及自动化] TP212.9[自动化与计算机技术—检测技术与自动化装置]