Scanning laser vibrometer for dynamic deflection shape characterization of aerospace structures

David E. Oliver

doi:10.1117/12.212022

16 June 1995 Scanning laser vibrometer for dynamic deflection shape characterization of aerospace structures

David E. Oliver

Proceedings Volume 2472, Applied Laser Radar Technology II; (1995) https://doi.org/10.1117/12.212022
Event: SPIE's 1995 Symposium on OE/Aerospace Sensing and Dual Use Photonics, 1995, Orlando, FL, United States

Abstract

The Scanning Laser Vibrometer (SLV) is becoming widely used as a cost effective tool for automated vibration measurement and analysis of aerospace structures and components. Applications include developing techniques for identifying damage in commercial aircraft, analyzing damage initiation mechanisms during environmental testing of circuit boards and optimum locations for active vibration dampers. The primary advantage of the SLV is the speed with which vibrational velocity measurements can be made over an area. An SLV scan of a structure such as the interior of a fuselage, gathering multi-frequency phase and amplitude values at every point, can be accomplished in less than the time taken to attach and acquire data from a single accelerometer. Results are superimposed in color on a digitized video image of the area tested. Laser vibrometers that offer finer velocity resolution, wider operating range and higher linearity are now available in a fully automated scanning package with ultra-high optical sensitivity. This optical sensitivity for testing untreated areas such as flat black surfaces of graphite composites has been limited in the past to low frequencies and amplitudes. Low optical sensitivity has especially restricted applications such as damage detection -- until now.

Citation Download Citation

David E. Oliver "Scanning laser vibrometer for dynamic deflection shape characterization of aerospace structures", Proc. SPIE 2472, Applied Laser Radar Technology II, (16 June 1995); https://doi.org/10.1117/12.212022

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available