Design and proposal of dual line-of-defense perimeter watchdog incorporating optimally designed FBG based accelerometers and strain sensors using single optical fiber

Mohd. Mansoor Khan; Ramesh Kumar Sonkar

doi:10.1117/12.2181626

15 June 2015 Design and proposal of dual line-of-defense perimeter watchdog incorporating optimally designed FBG based accelerometers and strain sensors using single optical fiber

Mohd. Mansoor Khan, Ramesh Kumar Sonkar

Author Affiliations +

Proceedings Volume 9654, International Conference on Optics and Photonics 2015; 965413 (2015) https://doi.org/10.1117/12.2181626
Event: International Conference on Optics and Photonics 2015, 2015, Kolkata, India

Abstract

Paper presents Opto-Mechanical intrusion sensor fence with FBGs attached to mechanical accelerometers and strain sensors, optimized on SolidWorks 2013 for desired frequency to 35 Hz, picking up accelerations/ strains and its deployment for perimeter security. The accelerometer structure consists of inertial mass supported by an L-shaped modified cantilever beam having non-uniform cross section area connected to base by a thin neck element which acts as strain concentrated centre hence an optimum zone for FBG sensors placement. Bragg wavelength shifts were obtained on Optigrating software for the obtained strain values on mechanical assembly of fence. CFD wind analysis is performed on the assembly to obtain the spot for accelerometer’s placement to avoid false alarms up to wind velocities of 20 m/s.

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Mohd. Mansoor Khan and Ramesh Kumar Sonkar "Design and proposal of dual line-of-defense perimeter watchdog incorporating optimally designed FBG based accelerometers and strain sensors using single optical fiber", Proc. SPIE 9654, International Conference on Optics and Photonics 2015, 965413 (15 June 2015); https://doi.org/10.1117/12.2181626

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KEYWORDS

Fiber Bragg gratings

Sensors

Optical fibers

Finite element methods

Neck

SolidWorks

Analytical research

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