UFC 4-021-02NF
27 September 2006
change 1, 23 October 2006
5-4.3.6.2 Table 5-2 provides additional design guidance and recommendations of use
of video content analysis and motion path analysis systems for wide area intrusion
detection.
Table 5-2. Video IDS Design Guidance and Recommendations
Issue
Recommendations
Use fixed cameras for video content analysis.
Camera Type
Consider use of pan-tilt-zoom cameras for
assessment, once intrusion detection occurs.
320 by 240 minimum.
Image Resolution
15 frames per second minimum.
Frame Rate
35-40 feet; higher is better.
Camera Mounting
Cameras mounted at 8-10 feet offer the ground end up
with too much occlusion.
Camera must be stable with good physical support.
200-300 feet.
Distance Between
Cameras
Parallel to the fence line or down to 45 degrees to the
Orientation to Fenceline
fenceline. (It is easier to detect an intruder moving
or Perimeter
laterally than pick up a target traveling down the throat
of a sensor/camera axis.)
5-4.4
Property/Fence Line Detection. Several types of fence-mounted perimeter
IDS exist. With all fence-mounted systems it is critical that the fence construction be of
high quality, with no loose fabric, flexing, or sagging material. The fence should also
have solid foundations for posts and gates. Otherwise nuisance alarms may occur. Five
types of exterior fence-sensing systems will be discussed: (1) electro-mechanical
systems, (2) taut-wire systems, (3) coaxial strain-sensitive cable, (4) Time Domain
Reflectometry (TDR) systems, and (5) fiber-optic strain-sensitive cable systems.
5-4.4.1 Electro-mechanical systems. According to the Perimeter Security Sensor
Technologies Handbook, electro-mechanical fence-sensing systems use either
mechanical inertia switches or mercury switches to detect a fence climbing or cutting
incident. An electronic controller looks for momentary contact openings of the inertia or
mercury switches. For more information on electro-mechanical fence-sensing systems
refer to the Perimeter Security Sensor Technologies Handbook. Due to advances with
other (better) technologies, electro-mechanical systems are not recommended for DoD
use.
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