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Appl. Sci. 2019, 9(3), 595; https://doi.org/10.3390/app9030595

Potential of Workshop Measurement Positioning System to Measure Oscillation Frequencies of Rigid Structures

1
School of Civil Engineering, Tianjin University, Tianjin 300072, China
2
State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China
*
Author to whom correspondence should be addressed.
Received: 7 November 2018 / Revised: 17 January 2019 / Accepted: 22 January 2019 / Published: 11 February 2019
(This article belongs to the Special Issue Structural Damage Detection and Health Monitoring)
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Abstract

A workshop measuring and positioning system (wMPS) is a large three-dimensional (3D) coordinate-measurement system based on optoelectronic scanning. It is capable of large-range coverage, high measurement accuracy and frequency, and multi-task synchronous measurement. Existing geodetic instruments cannot measure the intrinsic parameters of strong rigid structures. Thus, this study conducted experiments to explore the feasibility of the wMPS to measure the intrinsic parameters of rigid structures. A test bed was established using a reverse-engineering method to simulate the oscillation frequency of the structure. Displacement data, which changed with the time series through the fast Fourier transformation method, were analyzed to determine the feasibility and range of the wMPS in measuring intrinsic parameters of the structure. The experimental results demonstrated that the wMPS can measure the vibrational frequency up to 9 Hz with a 3-mm amplitude and up to 4 Hz with a 30-mm amplitude. View Full-Text
Keywords: natural frequency; health monitoring; rigid structure; wMPS natural frequency; health monitoring; rigid structure; wMPS
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Xiong, C.; Bai, H.; Lin, J. Potential of Workshop Measurement Positioning System to Measure Oscillation Frequencies of Rigid Structures. Appl. Sci. 2019, 9, 595.

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