Development and full-scale dynamic test of a combined system of heterogeneous laser sensors for structural displacement measurement

Abstract

The displacement responses of civil structures reveal the overall state of the structures and consist of two distinctive dynamic behaviors: pseudo-static deflection and structural vibration. In this study, a dynamic displacement estimation system is developed by integrating a laser Doppler vibrometer (LDV) and terrestrial laser scanner (TLS). The TLS displacement data contaminated with high noise and measured with a low sampling rate is converted to high sampling rate dynamic displacements including the pseudo-static motion by fusing with the velocity data measured by the LDV which are at a high sampling rate but miss the pseudo-static components