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Rotational speed measurement using electrostatic sensors with single or double electrodes

Wang, Lijuan, Hu, Yonghui, Yan, Yong, Qian, Xiangchen (2013) Rotational speed measurement using electrostatic sensors with single or double electrodes. In: IET Conference Publications. (623). ISBN 978-1-84919-758-8. (doi:10.1049/cp.2013.1736) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://dx.doi.org/10.1049/cp.2013.1736

Abstract

Rotational speed is a key parameter for condition monitoring and control of rotating devices in the energy, power, transport and manufacturing industries. Especially in wind farms it is essential to monitor the operating performance of wind turbines in real-time to monitor its operating condition and detect potential fault at an early stage. This paper presents a novel rotational speed measurement technique using electrostatic sensors with single or double electrodes in conjunction with autocorrelation and cross-correlation algorithms. Preliminary investigations show the electrostatic charge accumulated on the surface of the rotating equipment due to friction between air and other media contains useful information about the operating condition of the rotating equipment. Electrostatic charge induced on the sensing electrodes adjoining to the rotating equipment can be detected with a suitable electronic signal processing circuit. The system consists of a sensing unit, signal conditioning unit, signal processing unit and system control unit. The rotational speed measurement system has been evaluated on a laboratory scale test rig under a range of conditions. The experimental data demonstrate that the electrostatic sensing technology has the advantages of high accuracy, robustness and resolution. Applicability and performance of the measurement system with single or double electrodes are discussed. The new technique has advantages of low cost, simple structure, easy installation and suitability for hostile environments over conventional methods.

Item Type: Conference or workshop item (Paper)
DOI/Identification number: 10.1049/cp.2013.1736
Uncontrolled keywords: Correlation; Electrostatic sensor; Rotational speed; Velocity measurement
Subjects: T Technology
Divisions: Faculties > Sciences > School of Engineering and Digital Arts
Faculties > Sciences > School of Engineering and Digital Arts > Instrumentation, Control and Embedded Systems
Depositing User: Tina Thompson
Date Deposited: 02 Dec 2013 14:33 UTC
Last Modified: 29 May 2019 11:32 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/37102 (The current URI for this page, for reference purposes)
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