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Proceedings Paper

Real Time Investigation Of Rotating Objects Using ESPI System
Author(s): Boxiang Lu; Harald Abendroth; Heiner Eggers; Eckhardt Ziolkowski; Xiangyang Yang
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Paper Abstract

Many kinds of vibration, of great concern, occur to rotating structures such as turbines, propellers and brake disks. This paper describes how an electronic speckle patter' interferometry (ESPI) system is combined with the image derotator for the real time investigation of rotating objects. The ESPI + Derotator system is now capable of replacing holographic counterpart in most rotating structure measurements in industry with dramatic improvements in convenience and simplicity of use. A double pulsed Ruby laser illuminates the rotating objects at two positions of its vibration cycle respectively, and a reflective image derotator is used to compensate the rotational motion of the object. The speckle patterns between two laser pulses are correlated as a series of interferometric fringes, which give a picture of the dynamic vibration distribution on the surface of the rotating objects. Such information is valuable for the optimal design or investigation of noise generation.

Paper Details

Date Published: 31 March 1989
PDF: 4 pages
Proc. SPIE 1026, Holography Techniques and Applications, (31 March 1989); doi: 10.1117/12.950250
Show Author Affiliations
Boxiang Lu, Jurid Werke GmbH (F.R. Germany)
Harald Abendroth, Jurid Werke GmbH (F.R. Germany)
Heiner Eggers, Jurid Werke GmbH (F.R. Germany)
Eckhardt Ziolkowski, Jurid Werke GmbH (F.R. Germany)
Xiangyang Yang, Tsinghua University (China)

Published in SPIE Proceedings Vol. 1026:
Holography Techniques and Applications
Werner P. O. Jueptner, Editor(s)

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