Separation of vibration fringe data from rotating object fringes using pulsed ESPI |
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Authors: | Carlos Prez Lpez Fernando Mendoza Santoyo Ramn Rodríguez Vera Marcelo Funes-Gallanzi |
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Institution: | Carlos Pérez López, Fernando Mendoza Santoyo, Ramón Rodríguez Vera,Marcelo Funes-Gallanzi |
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Abstract: | In industrial and other types of non-controlled environments, an unbalanced rotating object may present characteristic out-of-plane vibration amplitude at a specific frequency. For this type of cases and as a first step towards a complete evaluation, it is only desired to visualize the effect of the vibration on the rotating object, or vice versa, for instance to achieve object balancing. Real time optical non-intrusive measurement techniques such as pulsed electronic speckle pattern interferometry (ESPI), are well suited to study this rotating-vibrating object. The advantage offered by ESPI is that real-time fringe data is qualitatively analyzed while being observed on a TV monitor. The present paper proposes a qualitative method, based on pulsed ESPI, to separate rotation fringes from fringes solely related to vibration. The method relies on a high precision scheme that synchronizes and fixes an object point during rotation, without the use of an optomechanical object derotator. |
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Keywords: | Electronic speckle pattern interferometry Twin pulsed laser Vibration and rotation fringes |
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