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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...
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...
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