Title :
Measurement and compensation of deformations in coordinate measurement arm
Author :
Vrhovec, Miha ; Kovac, Igor ; Munih, Marko
Author_Institution :
Elestra d.o.o., Ljubljana, Slovenia
Abstract :
The paper is dealing with Coordinate Measuring Arm (CMA) accuracy. Error sources contributing to the measurement uncertainty of CMAs are summarized. In sequence, the focus is on elastic deformations as one of the main error sources. A novel system is presented, developed specifically for measuring link deflections. A detailed evaluation of the system was performed. The results confirmed suitability of the system, which was subsequently mounted on a CMA segment for measurements of 1. external force influence on segment deflection, 2. dynamic measurements of link deflection and 3. compensation of CMA deformations. Vertical deformation in the segment was measured at 30 μm, the dynamic deformations were measured at 40 μm, while the improvement with compensation was found in order of 11% to 16%.
Keywords :
elastic deformation; error compensation; measurement by laser beam; measurement errors; measurement uncertainty; mechanical variables measurement; coordinate measuring arm accuracy; dynamic measurement; elastic deformation; error Compensation; link deflection; measurement uncertainty; segment deflection; vertical deformation; Acceleration; Force; Force measurement; Joints; Measurement by laser beam; Measurement uncertainty; Optical sensors;
Conference_Titel :
Optomechatronic Technologies (ISOT), 2010 International Symposium on
Conference_Location :
Toronto, ON
Print_ISBN :
978-1-4244-7684-8
DOI :
10.1109/ISOT.2010.5687319
