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Title: Use of laser scans and Drones to Measure Concrete Floor Waviness / Flatness Automatically

Author(s): Yelda Turkan, Oregon State

Publication: Web Session

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Date: 6/1/2020

Abstract:
This presentation on the use of laser scans and drones will describe a method of laser scanning a concrete surface to characterize the waviness of that surface and provide feedback to owners and concrete finishers. The comparative analysis of the various methods of measuring waviness in concrete slabs reveals that the 2-Dimensional (2D) Continuous Wavelet Transform (CWT) provides results that strongly correlate with those of the Waviness Index method (the current state of the art), but has numerous advantages over it and other existing methods. The next step in this study is to use this method in conjunction with augmented reality (AR) devices to enable the visualization of undulations corresponding to various characteristic periods on site. AR technology would provide visual information (3D laser scan data + ideal flat concrete surface) on surface waviness for comparison, which would enable timely decision making, and ultimately reduce project delays and extra costs associated with demolition and reconstruction.