Optical deflection measuring system |
| |
Authors: | Miha Vrhovec Igor Kova
Marko Munih |
| |
Affiliation: | aFaculty of Electrical Engineering, University of Ljubljana, Tržaška c. 25, 1000 Ljubljana, Slovenia;bInstitute of Production Engineering, Graz University of Technology, Kopernikusgasse 24, A-8010 Graz, Austria |
| |
Abstract: | A system for accurate real-time measurement of deflections was developed. A stable laser source is, by means of a single-mode fiber, coupled to an optical head located at one end of deformed structure. A detector circuit with a quadrant detector and processing electronics, located at the other end of the structure, communicates the resolved 2D position of the incident beam over a common digital bus. Experiments using interferometers were conducted in a climate-controlled chamber to evaluate system performance and verify the accuracy. A resolution of 0.1 m is attainable in dynamic measurements. The system was calibrated and tested to yield measurement accuracy of ± 0.8 m for ± 2σ probability over the measurement range of ± 300 m. Drift of the system in the experimental setup was determined to be less than 2 m for measurement in both degrees of freedom within the 10 h period under constant environmental conditions. |
| |
Keywords: | Optical deflection measuring Real-time error compensation Laser deformation measurement |
本文献已被 ScienceDirect 等数据库收录! |
|