Fiber SenSys Fiber Optic Perimeter Detection Systems Substation - - PowerPoint PPT Presentation

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Fiber SenSys Fiber Optic Perimeter Detection Systems Substation - - PowerPoint PPT Presentation

Mar 18, 2023 221 likes •767 views

Fiber SenSys Fiber Optic Perimeter Detection Systems Substation Physical Security Best Practices Baltimore 2017 Detection Sensor Deployment Options for Various Substation Barrier Systems Rod Hurley North American Sales Manager Eastern

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Fiber SenSys

Fiber Optic Perimeter Detection Systems Substation Physical Security Best Practices – Baltimore 2017

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Detection Sensor Deployment Options for Various Substation Barrier Systems

Rod Hurley North American Sales Manager Eastern Region Sales Manager Fiber SenSys, Inc. (800) 641-8150 Toll Free PA Office 717-235-3625 Office 503-701-6658 Cell rod.hurley@fibersensys.com www.fibersensys.com

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Objective

  • Each application dictates the appropriate

barrier and detection system selection.

  • The objective of this presentation is to

provide guidance for the application of fiber

  • ptic sensor on the most commonly-

encountered barrier variations.

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Barrier Variations

  • Chain-Link
  • Steel Pales, Pickets
  • Welded Mesh
  • Anti-Climb Fabrics
  • Expanded Metal
  • C-Wire, Razor Ribbon
  • Walls and Wall Tops
  • Wrought Iron
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Fiber Optic Detection System Diagram

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Fiber Optic Sensor – Theory of Operation

  • The multiple modes of light found in

multimode fiber form a random- intensity pattern known as a “speckle pattern.” The speckle pattern remains relatively constant and stationary if the fiber is undisturbed.

  • However, when the fiber is

disturbed due to motion, vibration,

  • r pressure, the alarm processor

witnesses a change in the speckle pattern and is designed to determine what the nature of the event is.

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Theory of Operation (cont.)

  • Very small changes in the multimode

speckle pattern are detected and analyzed by the system’s digital signal processors

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General Sensor Guidelines

  • Apply sensor based on the threat(s)

– Cut/Penetration: lower sensor run – Scaling and climb-over: all sensor runs – Ladder-assisted climb-over: upper sensor run

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Sensor Location Guidelines

  • Install sensor on the secure side of the

barrier (inside of the outer fence fabric)

  • Install sensor as close as possible to

expected point of impact with the barrier

– You want to use the minimal amount of “gain” or “sensitivity” to obtain the desired

  • PoD. This minimizes NAR.
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Sensor Location Guidelines (cont.)

  • Accommodate coexistence on the barrier

with other systems and infrastructure.

  • Be mindful of vulnerability to

vandalism/attack and maintainability when locating sensor.

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Examples of Barrier Variations

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Galvanized Chain Link Fence

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Vinyl-Coated Chain Link Fence

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Climb-Resistant Chain Link Mini-Mesh

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Welded Mesh Fence

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Rigid Fence with Anti-Climb Fabric

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Steel Pale Barrier

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Concrete Wall

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Masonry Wall

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Fence Barriers

  • Attach sensor (in flexible conduit) using

stainless steel ties every one foot of sensor.

  • Use two runs of sensor for the first eight

feet of fence height for chain link, welded mesh, and expanded metal fabrics.

  • Add a run of sensor for each additional four

feet of fence height.

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Sensor Attached to Chain Link Fence

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Sensor Attached to Expanded Metal Fabric

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11 ft. Tall Fence With 3 Sensor Runs

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Fence Barriers

  • Install additional sensor for reinforced

panels, along pull posts, and for service loops.

  • Within a detection zone, the barrier

structure must be homogeneous. Do not combine different fence types such as chain link and expanded metal within a zone.

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Add Sensor at Reinforced Fence Panels

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Service Loops

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Fence Barriers

  • Keep in mind that the more rigid the

structure, the smaller the propagation of vibrations.

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Rigid Metal Panel Barrier

  • Sensor is most often attached to the fence.
  • Sensor may be installed in the fence, but

this must occur in conjunction with the fence construction.

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Sensor Attached to Barrier

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Sensor in the Rails

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Steel Pale/Picket/Ornamental Barriers

  • Run sensor along rails (horizontal

members) or inside of rails

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Sensor Installed in Steel Pale Barrier

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Sensor Installed in Rail Using Clips

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Sensor Attached to Ornamental Fence

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Detection in Top Guard Obstacle

  • PL-1 military-style configuration

– Top run of sensor extends to cover

  • utriggers
  • Separate detection zones for sensor run in

top guard obstacles

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MIL Sensor Configuration

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Sensor Attachment in Razor Ribbon

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Sensor Installed in Top Guard

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Walls

  • Penetration detection

– Sensor mounted to the secure side of wall in a “serpentine” pattern

  • Climb-over detection

– Sensor in top guard or on outriggers – Sensor on stand-offs to detect hand-hold or foot-hold attempts

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Masonry Wall-Mounted Sensor

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Sensor on Reinforced Concrete Block

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Sensor with Wall Top Outriggers

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Wall Top Sensor on Stand-Offs

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Masonry Wall with Sensor on Stand-Offs

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Gates

  • Sensor can be installed on swing-type

gates, crossing the hinge at a diagonal to prevent kinking of the sensor

  • Use a cable trolley system or separate

motion sensor to protect sliding gate areas

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Double Leaf Swing Gate

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Cable “Trolley” System for Sliding Gate

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Other Concerns

  • Loose fence fabric or components
  • Loose signage
  • Conduits run along interior of the barrier
  • Drainage culverts
  • Vegetation and overhanging tree branches
  • Wildlife
  • Weather
  • Testing Methods
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Sensor Woven in Culvert Grating

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Testing Methods

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Expanded Metal and Welded Mesh

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Sound-Dampening Panel

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Perimeter Security Today, it’s more than just a fence.