Intrusion Detection and Alarm Performances:

The larger shall detect 100% of the intruder cutting through the FOM or climbing over the top of the weights larger than 10 – 20 kg.

Vulnerably to defeat (Vtd) : The system shall not allow any hidden intrusion attempts such as silent cutting, slow/fast movements ,crawling, jumping over or disassembling FOM by using commercial tools without being detected.

Intrusion location: The system shall locate one intrusion per optical port of OSU within ±15m accuracy (5m system error ± 10m installation error)

Importance of Location Accuracy: Location accuracy within ± 15m is necessary because human eyes as well as CCTV Cameras have visible range of 30m. If CCTV Cameras interfaced with PIDS is unable to pinpoint an intrusion location, CCTV Cameras should be placed at a spacing double of the unit sensing zone (typically at 200 m spacing when the unit sensing zone is 100m) FOMGuard can extend CCTV Camera spacing upto 400m by placing the cameras at selected locations with direct line-of-sight such that the camera turn to aim at the intrusion spot upon the reception of the accurate location data from ACS. This may reduce CCTV system cost by as much as FOMGuard cost itself.

The intrusion alarm / action event data shall be automatically logged in the system memory and be displayed / printed upon keyboard control.

The system shall provide additional input ports for wireless sensors (IR sensors, Microwave sensors) to be used in empty spaces such as gates, roads etc, without their own controller.

Environmental Characteristics:

The system shall be immune to all kinds of environmental effects such as

Electrical (EMI, power lines, lighting, electrostatic)
Water (rain, snow, haze)
Vibration (wind, storm, sound, vehicle)
Miscellaneous (blowing debris, birds, vegetataions, sand storm, dust, pollution etc)
Operating temperature: 40ºC + 75ºC

The system shall be affected neither by perimeter geometry nor ground instability.

The system shall show false alarm less than 1 time per km for three months and shall have a 10 years lifetime guarantee with proper maintenance

Importance of no false alarms: PIDS is to detect very rare intrusions (approximately) one intrusion per year )PIDS giving frequent false alarms will be ignored by the operator and abandoned .In the case of the Taegu Subway Station Fire Disaster which occurred on Feb 18,2003 and killed about 200 people and injured about 300 , people , the casualties sharply increased because the security officers at the main control center ignored the fire alarms due to frequent false alarms in the past.

Maintenance:

The Fiber Optic Mesh can not only bypass unwanted areas where other sensors are employed but also be installed exactly fitted to gates without any additional electronic equipment.

The broken FOM can be either directly repaired or column – replaced using commercial slicing tools by trained personnel.

ACS can display OTDR patterns of FOM to check Optical loss /fault/break by keyboard control without disconnecting the Separation Fiber Optic Cables.