Comparative Test Analysis for Determining Dynamic Deflection by Using GNSS/RTK, Trigonometric Leveling and Elevation of Sight

Abstract:

Respectively applied Trimble R8 GNSS/RTK, Leica TCA2003 3D coordinates measurement and SPRINTER 200M elevation of sight to synchronously monitor the deflection displacement of an underdamped oscillation, it has a 0.5 Hz design frequency and mm level amplitude in this test. Based on the FFT algorithm, spectral information was independently calculated out from these observed data of deflection displacement. Combined the spectrogram with the deflection displacement of R8, TCA2003 and SPRINTER 200M monitoring points, this paper makes a comparative analysis. The results show that the TCA2003 automatic tracking measurement can not only accurately measure the dynamic changes in the process of the damped oscillation dynamic deflection but truly reflect the structure of the dynamic deformation characteristics; the SPRINTER 200M digital leveling can monitor the overall trend of dynamic deflection, but get a harmonic frequency; and GNSS/RTK only acquires a harmonic.

• Periodical: Advanced Materials Research (Volumes 694-697)
• Pages: 374-378
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.694-697.374
• Online since: May 2013
• Authors: Zhong Ping Liao, Zheng Jun Wang, Wen Yu Zhao
• Keywords: Deflection, Digital Leveling, Dynamic Measurement, FFT, GNSS/RTK, TCA2003

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