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。
Abstract
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 signal generator and the demodulation module. We compare this circuit with the circuit based on AD698 chip in linearity, 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 aspects, 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
{{custom_keyword}} ;
Key words
hydraulic valve ;
displacement measurement ;
discrete component ;
detecting circuit
{{custom_keyword}} ;
基金
山西省科技攻关资助项目(20140313006-7)
{{custom_fund}}
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] 陈伟,张剀,戴兴建.基于AD698的半桥式电感位移传感器高灵敏度测量电路设计[J].电子技术应用,2008,34(7):69-71.
CHEN Wei, ZHANG Kai, DAI Xingjian. Signal Modulation Circuit Design of the Half-bridge LVDT Based on AD698 for High Sensitivity Applications [J]. Application of Electronic Technique, 2008,34(7):69-71.
[2] 吴义华,杨俊峰,程敬.正弦信号四参数的高精度估计算法[J].中国科学技术大学学报,2006,36(6):625-629.
WU Yihua, YANG Junfeng, CHENG Jing. High-accuracy Estimation Algorithm for 4 Parameters of Sine-wave [J]. Journal of University of Science and Technology of China, 2006,36(6):625-629.
[3] SHANGTEH W, JYUNLANG H. Five-point Amplitude Estimation of Sinusoidal Signals: with Application to LVDT Signal Conditioning [J]. IEEE Transactions on Instrumentation and Measurement, 2010;59(3):623-630.
[4] 洪志刚,杜维玲,周玲.半桥式电感位移传感器信号变送电路设计[J].国外电子测量技术,2006,25(5):30-33.
HONG Zhigang, DU Weiling, ZHOU Ling. Signal Transducer Circuit Design of the Half-bridge LVDT [J]. Foreign Electronic Measurement Technology, 2006,25(5):30-33.
[5] Analog Devices Universal LVDT Signal Conditioner AD698[Z]. Analog Devices Datasheet, 2002.
[6] 张剀,董金平,戴兴建.AD698解调的电感位移传感器性能提升[J].仪表技术与传感器,2010,(9):10-12.
ZHANG Kai, DONG Jinping, DAI Xingjian. Performance Improvement of Inductive Displacement Sensor Based on AD698 [J]. Instrument Technique and Sensor, 2010,(9):10-12.
[7] 叶树亮,王克奇.采用场效应管稳幅的高稳定度正弦波信号源[J].信息技术,2003,27(12):18-19.
YE Shuliang, WANG Keqi. High Stability Sine-wave Generator with Field Effect Transistor [J]. Information Technology, 2003,27(12):18-19.
[8] LI Sunming, QUAN Long, LIANG Yilong. Application of AD698 Measuring Circuit in Valvistor Hydraulic Cartridge Valve [J]. Sensors & Transducers,2014,173(6):104-109.
{{custom_fnGroup.title_cn}}
脚注
{{custom_fn.content}}
PDF(1414 KB)
