UFC 4-021-02NF
27 September 2006
change 1, 23 October 2006
Table 5-7 Exterior IDS Applications Table
Application
Sensor Type
Notes
Taut wire
Very sensitive, high maintenance.
Fence line
Coaxial strain-sensitive
Works, susceptible to EMI.
TDR
When fence is not in good condition..
Fiber Optic
More expensive, but better filtering.
CCTV (Video Content
Best current technology, can account for trees blowing
Analysis/Motion Path
or normal motion, but is the most expensive.
Analysis)
BMS
Simplest device, provide lightning protection.
Gates
Fence detection systems.
Will detect a fence intruder that climbs the gate.
Magnetic loop sensor
Will detect vehicles only.
CCTV (Video Content
Best current technology, can account for trees blowing
Analysis/Motion Path
or normal motion, but is the most expensive.
Analysis)
Open areas
Works well in desert environments, does not work well
around trees and un-cleared line-of-sight areas.
Ported Coaxial
Does not work well near electrical substations, certain
geographic areas with unusual magnetic influences.
Can be effective, when used as part of a double-fence
system.
Best current technology, can account for trees blowing
CCTV (Video Content
or normal motion, but is the most expensive.
Analysis/Motion Path
Analysis)
Note: Table 5-7 is not all inclusive of all exterior sensor options. Refer to text above for
more detail.
5-7
SUMMARY
5-7.1
In general, intrusion detection is challenging. There is no one single sensor
system that works in all applications. Realistically, the best Pd that can be achieved by
a single system is 95%. Given enough time and resources, all intrusion detection
systems can be defeated. For simple installations with lower security needs, a fiber-
optic fence-perimeter detection-system works well. For higher security applications,
double fences/intermediate, gravel bed and microwave sensors offer improved security.
Video content analysis is an up-and-coming technology that will only improve with time
as software algorithms more closely simulate alert human operators.
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