Development of a laser-based line scan measurement system for the surface characterization of reinforcing steel

摘要

The fatigue behavior of reinforcing bars is mainly influenced by their surface properties. Massive ribs and sharp notches provoke failure in fatigue. For the current research, it was necessary to develop a measurement system in order to allow for the highly precise measurement of the surface of fair sized fatigue specimens. The paper presents the boundary conditions at the beginning of the research project and gives a short overview of the measuring techniques currently used. It presents the development of a laser-based line scan (LLS) measuring system which applies the principle of laser-triangulation. The high accuracy and precision of the system of measurement was quantified in several investigations.