Development of a dynamic surface shape measurement system for liquid, solid and geographic surfaces

2014 Fiscal Year Final Research Report

• Project/Area Number: 24656291
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Hydraulic engineering
• Research Institution: Hokkaido University
• Principal Investigator: WATANABE Yasunori 北海道大学, 工学(系)研究科(研究院), 准教授 (20292055)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 計測工学 / 画像処理 / 自由水面 / プロジェクタ / デジタルカメラ

Outline of Final Research Achievements

A novel imaging system to measure three-dimensional surface shapes, based on the projector-camera system, was improved with aim to extend the practical applicability to coastal and hydraulic engineering. The additional algorisms to synchronize the projector and digital camera and to dynamically track the color patterns reflected on the surfaces were developed and introduced to the measurement system. The additional improvement for reducing optical errors associated with Lambert multiple dispersion system formed in liquid was also introduced to the system.
The developed measurement system was applied to experimental breaking waves to examine the reliability and capability to measure dynamic deformation of the free-surface. The measured results provided new aspects of the physical evaluation of transient free-surface forms of breaking waves.

Free Research Field

海岸工学