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Journal of Sensors - Volume 2017 2017, Article ID 6453243, 10 pages - https:-doi.org-10.1155-2017-6453243

Research Article

School of Electronic and Information Engineering, Soochow University, 333 Ganjiang East Road, Suzhou 215006, China

Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China

Institute Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China

Correspondence should be addressed to Menghui Zhi

Received 29 August 2016; Revised 15 November 2016; Accepted 1 December 2016; Published 5 January 2017

Academic Editor: Stefania Campopiano

Copyright © 2017 Menghui Zhi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In engineering practice, instruments, such as accelerometer and laser interferometer, are widely used in vibration measurement of structural parts. A method for using a triaxial fluxgate magnetometer as a microvibration sensor to measure low-frequency pendulum microvibration not translational vibration is proposed in this paper, so as to detect vibration from low-frequency vibration sources, such as large rotating machine, large engineering structure, earthquake, and microtremor. This method provides vibration detection based on the environmental magnetic field signal to avoid increased measurement difficulty and error due to different relative positions of permanent magnet and magnetometer on the device under test DUT when using the original magnetic measurement method. After fixedly connecting the fluxgate probe with the DUT during the test, the angular displacement due to vibration can be deduced by measuring the geomagnetic field’s magnetic induction intensity change on the orthogonal three components during the vibration. The test shows that the microvibration sensor has angular resolution of over 0.05° and maximum measuring frequency of 64 Hz. As an exploring test aimed to detect the microvibration of earth-orbiting satellite in the in-orbit process, the simulation experiment successfully provides the real-time microvibration information for attitude and orbit control subsystem.





Author: Menghui Zhi, Liang Tang, Xin Cao, and Donghai Qiao

Source: https://www.hindawi.com/



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