Structural health monitoring by embedded fiber Bragg gratings

Thomas Alt; Kathrin Badstuebner; Bernd Michel; A. Ansorge

doi:10.1117/12.544089

1 September 2004 Structural health monitoring by embedded fiber Bragg gratings

Thomas Alt, Kathrin Badstuebner, Bernd Michel, A. Ansorge

Proceedings Volume 5459, Optical Sensing; (2004) https://doi.org/10.1117/12.544089
Event: Photonics Europe, 2004, Strasbourg, France

Abstract

At Fraunhofer Institute for Reliability and Microintegration IZM, Fiber Bragg Gratings (FBG) are used for online measurement of mechanical deformations and temperature changes within electronic packaging and mechatronic systems. Encapsulation processes with rapid prototyping materials like stereolithography resin and vacuum casting polymers are monitored, as well as high volume production processes like Reactive Injection Molding (RIM). This paper discusses the effects that occur when the geometrical and mechanical properties of the measured object are comparable to the sensing system and when the fiber optic sensor is significantly influencing the measurement. Package reliability in electronics is intensively studied at our institute [1] and this paper will evaluate the ability of FBG to detect structural changes like cracks and delaminations within electronics. By embedding the fibers directly into the polymer packaging the sensor can be used for continuous lifetime monitoring of the system, starting with real-time cure monitoring during production processes and ending with structural health monitoring during product lifetime and quality testing.

Citation Download Citation

Thomas Alt, Kathrin Badstuebner, Bernd Michel, and A. Ansorge "Structural health monitoring by embedded fiber Bragg gratings", Proc. SPIE 5459, Optical Sensing, (1 September 2004); https://doi.org/10.1117/12.544089

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