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Title: Experimental validation of a newly designed 6 degrees of freedom scanning laser head: Application to three-dimensional beam structure

A new scanning laser head is designed to use single Laser Doppler Vibrometer (LDV) for performing measurements up to 6 degrees of freedom (DOF) at a target. The scanning head is supported by a rotating hollow shaft, which allows the laser beam to travel up to the scanning head from an opposite direction where an LDV is set up. The scanning head is made of a set of two mirrors, which deflects the laser beam with an angle so that the rotation of the scanning head produces a conical scan. When measurements are performed at the focal point of the conical scan then three translational vibration components can be measured, otherwise the very small circle scan, before and after the focal point, can measure up to 6 degrees of freedom, including three translations and three rotations. This paper presents the 6DOF scanning head and the measurements of 3D operational deflection shapes of a test structure.
Authors:
 [1] ;  [2]
  1. Department of Mechanical Engineering, University of Bristol, Queen's Building, University Walk, Bristol BS8 1TR (United Kingdom)
  2. Università Politecnica delle Marche, P.zza Roma 22, 60121 Ancona (Italy)
Publication Date:
OSTI Identifier:
22250745
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 84; Journal Issue: 12; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; BEAMS; DEGREES OF FREEDOM; DESIGN; LASERS; MECHANICAL SHAFTS; MIRRORS; ROTATION; VALIDATION