Journal
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
Volume 69, Issue 12, Pages 13763-13772Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIE.2021.3130325
Keywords
Axial and transverse sensitivities; elliptical orbit excitation; monocular vision (MV); triaxial vibration sensor; vibration calibration
Categories
Funding
- National Key R&D Program of China [2017YFF0205003]
- National Natural Science Foundation of China [52075512, 61640014, 61861007]
- Innovation Group of Guizhou Education Department [KY [2021]012]
- Science and Technology Fund of Guizhou Province [[2020]1Y266]
- Industrial Project of Guizhou Province [Qiankehe Zhicheng [2019]2152]
- Case Laboratory of IOT [KCALK 2017 08]
- Control Theory and Control Engineering Discipline [[2015]008]
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This article investigates a monocular vision-based two-component shaker calibration method, which determines the axial and transverse sensitivities of low-frequency triaxial vibration sensors. The method reduces uncertainties caused by reinstallations and motion coupling and improves the calibration accuracy.
The low-frequency triaxial vibration sensors have been gradually applied in many engineering fields of vibration monitoring because they can measure the multidirection vibrations simultaneously. The accurate axial and transverse sensitivities, determined by the calibration method, are the prerequisite for ensuring their measurement accuracy. Currently, the laser interferometry (LI) which is based on a single component or a tricomponent linear shaker is usually applied to calibrate these sensitivities. However, the former has to require the multiple reinstallations of the sensor and the latter cannot avoid the motion coupling caused by the shaker, these inevitably increase the calibration uncertainty. In this article, we investigate a monocular vision (MV)-based two-component shaker calibration method, which determines the axial sensitivity based on the time-spatial synchronization and transverse sensitivity at the elliptical orbit excitation. The MV method is used to measure this excitation, and a plane sensitivity model is presented to describe these sensitivities. This investigated method can simultaneously reduce the uncertainties caused by the reinstallations and motion coupling to improve the calibration accuracy. Experimental results compared with the LI and Earth's gravitation method demonstrate that the investigated method obtains the satisfactory accuracies both in axial sensitivity magnitude and phase as well as transverse sensitivity magnitude and direction calibration.
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