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.