FlexPatch: a rugged miniature FBG strain sensor

Steve Ferguson; Don Snyder; Tom Graver; Alexis Méndez

doi:10.1117/12.714435

10 April 2007 FlexPatch: a rugged miniature FBG strain sensor

Steve Ferguson, Don Snyder, Tom Graver, Alexis Méndez

Proceedings Volume 6530, Sensor Systems and Networks: Phenomena, Technology, and Applications for NDE and Health Monitoring 2007; 653004 (2007) https://doi.org/10.1117/12.714435
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2007, San Diego, California, United States

Abstract

The design and development of a novel opto-mechanical strain sensor-called FlexPatch-based on the use of an optical fiber Bragg grating (FBG) mounted into a custom-made miniature metallic flexure is reported. The FBG sensing element is attached to a carrier flexure using proprietary bonding process which ensures a linear, drift-free and repeatable strain response even under severe moisture and temperature conditions. The sensor is uncompensated for temperature effects, but has undergone extensive mechanical and environmental testing and is qualified for use in a strain range of +/- 2,500&mgr;&egr; with a gage factor of 1.2pm/&mgr;&egr; over a temperature range from -40° to 120°C, and a fatigue life >100x10⁶ cycles. The FlexPatch is intended for use in diverse sensing and monitoring applications and can be installed onto surfaces by epoxy bonding or spot welding.

Citation Download Citation

Steve Ferguson, Don Snyder, Tom Graver, and Alexis Méndez "FlexPatch: a rugged miniature FBG strain sensor", Proc. SPIE 6530, Sensor Systems and Networks: Phenomena, Technology, and Applications for NDE and Health Monitoring 2007, 653004 (10 April 2007); https://doi.org/10.1117/12.714435

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