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

• Published in: Applied sciences Vol. 9; no. 3; p. 595
• Main Authors: Xiong, Chunbao, Bai, Hongzhi, Lin, Jiarui
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 11-02-2019
• Subjects: Accelerometers; Accuracy; Amplitudes; Bridges; Calibration; Civil engineering; Coordinate transformations; Experiments; Feasibility; Fourier series; Fourier transforms; Global positioning systems; GPS; health monitoring; Lasers; Measuring instruments; natural frequency; Optimization; Optoelectronics; Researchers; rigid structure; Rigid structures; wMPS; China
• ISSN: 2076-3417; 2076-3417
• DOI: 10.3390/app9030595

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.