Reliability analysis of fiber optic sensors for structural health monitoring applications

Yasir Majeed; Moustafa Al-Bassyiouni; Abhijit Dasgupta

doi:10.1117/12.815831

30 March 2009 Reliability analysis of fiber optic sensors for structural health monitoring applications

Yasir Majeed, Moustafa Al-Bassyiouni, Abhijit Dasgupta

Proceedings Volume 7292, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2009; 72923E (2009) https://doi.org/10.1117/12.815831
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2009, San Diego, California, United States

Abstract

The paper parametrically explores the design sensitivity of a fiber optic pressure sensor (FOPS), based on the potential failure mechanisms expected in the sensor diaphragm. The product under study is a miniature FOPS that can be embedded in, or installed on, a structure for pressure monitoring applications. The field operating conditions are defined in terms of temperature, pressure, and vibration loading. The FOPS probe has a Fabry-Perot cavity, with the fiber tip and a miniature diaphragm acting as the two mirrors. The cavity length changes when the diaphragm deflects under pressure. However, due to field operating conditions, several failure mechanisms may affect the structural and optical characteristics of the sensor, such as cracks in the diaphragm and/or high residual stresses in the optical fiber. With the aid of finite element analysis, this article investigates conflicting design constraints due to structural failure mechanisms in the diaphragm and elaborates on the severity of each one by parametric design sensitivity studies.

Citation Download Citation

Yasir Majeed, Moustafa Al-Bassyiouni, and Abhijit Dasgupta "Reliability analysis of fiber optic sensors for structural health monitoring applications", Proc. SPIE 7292, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2009, 72923E (30 March 2009); https://doi.org/10.1117/12.815831

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KEYWORDS

Sensors

Fiber optics sensors

Finite element methods

3D modeling

Reliability

Silicon

Fiber optics

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