Speed Condition Monitoring of Rotating Machinery Using Electrostatic Method

被引：0

作者：

Li, Lin ^{[1
]}

Wang, Xiaoxin ^{[1
]}

Hu, Hongli ^{[1
]}

Yang, Xingyue ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, State Key Lab Power Equipment & Elect Insulat, Xian 710049, Peoples R China

来源：

2015 9TH INTERNATIONAL CONFERENCE ON SENSING TECHNOLOGY (ICST) | 2015年

关键词：

rotational speed measurement; electrostatic sensor; cross-correlation function; auto-correlation function; DIGITAL TACHOMETER; GMR SENSORS;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Rotational speed monitoring is a critical part in the automatic control system of large generators and centrifugal machine. This article designed a rotational speed measurement system using electrostatic sensors and a correlation signal processing method. Two categories were utilized for the speed measurement-two sensors using cross-correlation method and a single sensor using auto-correlation method. Meanwhile, further signal processing methods were adopted to improve the accuracy of measurement results. Experimental tests were carried out on a laboratory-scale test rig under a rotational speed range from 400r/min to 3800r/min. The results show that the linearity of cross-correlation method and auto-correlation under experimental conditions is 1.53% and 0.52% correspondingly. In the same time, the auto-correlation method has a higher accuracy than cross-correlation method with the relative error lower than 1%.

引用

页码：345 / 350

页数：6

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