No. 1 FENCE SECURITY SYSTEM

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Fiber Optic Mesh Guard (FOMGuard)

FOMGuard: Perfect & Simple perimeter protection through fiber optic mesh intrusion detection system with fence skin concept.

 Overview: 

The FOMGuard intrusion detection system, surrounding and protecting important facilities, shall detect intrusion by generating audible alarm and pinpointing an intrusion spot on a display map within 15m accuracy.  FOMGuard is based on Fiber Optic Mesh Sensor and Optical Radar Technology.  The OSU (Optical Sensing Unit) injects Infrared Laser pulses into Fiber Optic Mesh and it detects optical echoes of the Infrared Laser pulses caused by a cutting or excessive force when an intruder pulls or cuts off the Fiber Optic Mesh.  The ACS  (Alarm Control Station) which is located at MCC (Main Control Center) receives the intrusion data from OSU and generates the audible alarm and pinpoints the intrusion spot.

FOMGuard was originally developed for Korean Border (DMZ) in 1982 by ADD (Agency for Defense Development). Throughout its domestic applications in Korea, the system has been evaluated as new and superb over any other products currently introduced around the world.

FOMGuard offers a unique solution that provides 100% full proof detection of intrusions from digging to climbing over fences and it is applicable unlimitedly by terrain conditions and fence types without the concern of false alarms.  It is maximum cost-benefit solution to protect important facilities such as air force bases, airports, missile sites, nuclear power plants, gas/oil water reservoirs, electric power plants, military headquarters, military sites, palaces, jewelry/semiconductor factories, jails, national institutes, borders, VIP residential areas etc.  against highly trained intruders such as spies, terrorists or guerrillas.

Performance

• No false alarm due to environmental effects or outside influences

• 100% detection of intrusion without being defeated by an intruder

• Pinpoint the intrusion location within 15m accuracy

• Negligible Maintenance

• Applicability not limited by terrain conditions or fence types

FOMGuard Operational Performances Specifications, typical

Intrusion Detection and Alarm Performances:

The system shall detect m100% intruders cutting through the FOM or climbing over FOM top by excess force larger than 10-20 kg.

Vulnerability 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 being without being contacted.

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

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, Microwaves sensors) in empty spaces such as gates, roads etc; exempting their own controller.

Environmental Characteristics:

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

1. Electricity (EMI, power lines, lightning, electrostatic etc).

2. Water (rain, snow, haze)

3. Vibration (wind, storm, sound, vehicle vibration)

4. Neighboring (blowing debris, birds, vegetations, sand storm, dust, pollution etc.)

5. Operating Temperature: 40C + 75C

 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 year life-time with proper maintenance.

 Maintenance: 

 The Fiber Optic Mesh can 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 splicing tools by trained persons.

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

FOMGuard Description:

• A perimeter as large as 2 km x 3m can be controlled by an ACS at the MCC(Main Control Center). A large area can be detected by a number of OSUs each covering an area of 2 k.m x 3m which are connected to and controlled by an ACS at MCC via FOCC(Fiber Optic Contol Cable) remotely

• An unit facility with a perimeter less than 500m x 3m can be controlled by OIA( Optical Intrusion Alarm) which is simple desk-top version of ACS/OSU.

• ACS can be interfaced with CCTV to automatically detect the intrusion spot and can be interfaced with Warning or Access Control and can be communicated and integrated with other services

• FOMGuard is virtually false alarm free because of the following: 1) immunity to all kinds of environmental effects such as water, electricity, vibration, neighbors as well as atmospheric temperature and 2) a negligible amount of electronic equipment outdoors which is affected by water, electricty and temperature.

• FOMGuard is applicable in any of three installation types:1) overlaid to existing fences, 2)free-standing or 3)over a wall . Therefore it is unlimited by terrain conditions and fence types

• Intrusion by digging below the fence can be detected by Grooved Rods, which are fixed to FOM and stuck underground. The grooved rods trigger alarms when pulled out by an intruder.

• FOMGuard provides effective anti-digging measures depending on terrain conditions: 1) FOM bottom fixed to the top of Grooved Rod on soil base. 2) FOM bottom fixed to the top of Grooved Rod and BFOSC (Buried Fiber Optic Sensor Cable) fixed to the middle of Grooved Rod on sand base and 3) FOSC( Fiber Optic Sensor Cable) weaving between FOM bottom and rock base.

• FOM is fixed to the top and bottom of the fence frames with special fixtures, which does not allow any intrusion without being detected.

• FOM is installed to gates or can bye-pass unwanted areas or surround security guard posts

• For an open gate, field sensors( IR sensors or Microwave sensors) can be placed and also controlled by ACS which replaces the field sensors existing controllers.

• Broken FOM can be repaired using commercial splicing tools in their direct repair or column replacement without any difficulty.

Benefits by FOMGuard

• Perfect Perimeter Protection with minimal security guards: The chance of intrusion detection by human security guards has been recorded as 42% . Throughout the 1970s, there were 21 intrusions by North Korean Commandoes along the 155 mile borderline and, only 9 out of 21 intrusions cutting through fence mesh below 1m were detected by the security guards which were placed apart about 100m apart. At 2:00 am on July 8, 2001 two intruders knocked down two security guards of an army site at Yeoung Cheon in Korea and robbed an M16 rifle. At 3:00 am on February 25, 2002, a similar incident occured where two intruders attacked two security guards with knife at a Seoul Defense Site and robbed M16 rifles again. Such incidents illustrate that intruders can not be effectively detected by human eyes and ears. on March 16, 2001, a Russian airplane landed at Istanbul Airport in Turkey was hijacked by Chechen intruders through a fence. FOMGuard shall enhance detection reliability upto 100% from 40% with about 10% cost of security by manpower.

• Reduce Fence Cost: Intrusion can be made by cutting through a fence mesh in only a couple of minutes or climbing over a fence in a few seconds. Steel fences or thick walls are to be replaced by a thin fence with FOM to reduce the cost of the fence while enhancing security. Grooved Rods fixed with FOM provide better anti-digging protection than concrete basements and reduce costs. Standing-free FOM shall save the fence the cost of the fence compared to FOM to the existing fence.

• Reduce CCTV Cost: Location accuracy within +/- 15m is necessary because human eyes as well as CCTV Cameras have visible range of 30m typically. If PIDS is unable to pinpoint an intrusion location, CCTV Cameras interfcaed with the PIDS should typically be placed every 200m which is double of the 100m unit sensing zone. CCTV Camera installation spacing can be extended upto 400m when interfaced with FOMGuard, which enables CCTC Cameras to be put at selected location with direct line-of-sight so that the cameras turn to aim exactly at the intrusion spot upon reception of the accurate data from the ACS of FOMGuard system. It may reduce the number of the cameras and cost.

 FOMGuard equipment Specifications: 

1.  FOM-HM (Fiber Optic Mesh)

 Environmental characteristics:

Operating temperature 30C +75C

The cable diameter/color: 3mm/black

Optical Fiber grade: 125, multimode

Mesh Width:  H meters

Cell Size: 85cm below 1.5m height, 90-120cm over 1.5m, typical

Lifetime: over 10 years with proper maintenance

2. OSU-nP (optional Sensing Unit)

Sensing coverage per optical port: 3m x 250m for break,

3m x 200m for excess force stronger than 10-20 kg.

No of Optical Ports: n

Fiber Optic connector type : FC multi mode

Dimension 35 x 45 x 42 cm

Operating condition, indoors, inside shelter for outdoors

Power: AC220V +10% 50 / 60Hz.

70Watt for OSU-2P, 250Watt for OSU-SP 

3. ACS-nP/kT (Alarm Control Station)

Operation mode:  Normal Test, Emergency, Setting Stop

Sensing mode, cutting, excess force, selectable

Location Accuracy, 15m error

No. of optical ports: n SFOCs No. of terminals: k OSUs.

External Connection port:  PC interface

Fiber Optic test function semi OTDR

Auto logging: alarm, action, status, setting value etc

Monitor: 17” color

Communication Port:  RS232C/RS422/RS485 (optional)

CCTV interface:  ON/OFF or other customer requirement

Acceptable output devices:  warning light, signal phone

Acceptable input devices. IR/MW sensor, shock sensor,

O/S Window 98 English (up to Window 2000)

Dimension 195 cm x 80 cm x 75 cm/ 150 cm x 60 cm x 75 cm

Operating Condition:  indoors

Power AC220V 10% 50/60Hz, 400 Watt approx. 

4. OIA (Optical Intrusion Alarm)

 Operation Mode:  Normal  Test, Emergency Setting, Stop

Sensing Mode:  cutting, excess force, selectable

Location Accuracy: 15m

No of max optical ports 2

Auto-logging, alarm, action, status, setting value, etc.

Monitor: 5’7” LCD

Dimension:  45 cm x 16 cm x 35 cm

O/S Window 98 English 9Up to Window 2000)

Operating Condition:  indoors

Power: AC 220V 10% 50/60Hz, 100/ Watt approx

  Installation 

• FOMGuard is applicable in any of the three installation types:

1. Over a wall

2. Overlaid to an existing fence,

3. Standing-free and it is unlimited by terrain conditions and fence types

FOM over a wall

Intrusions by climbing over any wall, even a 6m high wall with a rope can be detected by 1m FOM over a wall

FOM to existing Steel Fence on Soil Base

For the existing standard Steel Fence of Y-Shape with 2.3 m height, FOM shall be overlaid to the entire surface from bottom to either a 70cm extension to detect penetration and climbing over or 1m extension to detect upto climbing over by using a ladder.  FOm should be firmly fixed to the top and bottom of the fence frames with special fixtures (concrete Fixture and Top Transducer).  To protect against digging on soil base, put short grooved rod (80cm) underground at 30cm spacing.  FOM bottom shall be fixed to the top of the short grooved road to detect being pulled out by an intruder.  Intrusion by digging deeper than 80cm underground without being detected is almost impossible for an intruder.  Buried Cable Sensors (H-Field, Leaky RF cable, Vibration and Pressure Sensor Cable) are ineffective against digging due to false alarms and poor reliability.  The sensitivity of those sensors severely degrades in rainy or humid conditions and surface thickness non-uniformity.  For example, a leaky RF buried cable which is buried 10cm underneath the ground is of no use in case of a large perimeter.  The sensitivity of the cable severely degrades by the presence of other objects (trashes or grasses), water (rain and snow) and surface hardness variation due to temperature change.  

Standing-free  FOM Fence on Sand Base

Installing FOM without a fence or Y-frames reduces cost compared to installing FOM to a standard steel fence without degrading detection capability.  Standing-free FOM with 3m height shall detect penetration and climbing over and even if an intruder uses a ladder, which is equivalent to 3.3m FOM overlaid to the existing fence.  To delay intrusion to allow the time required for the security guards to reach the intrusion spot after alarm by ACS, it is recommended to put a number of concertina rolls inside the free standing FOM Fence.  When installing a FOM Fence, put steel posts (50x50x5 angle) typically at 4M spacing and attach 3m spacing and attach 3m FOM and Fix the top and bottom of the FOM with special fixtures (concrete Fixture and Top Transducer).  Against digging sand base, embed a long grooved rod (120 cm) underneath the ground at 25cm spacing.  FOM bottom fixed to the top of the long grooved road and FOSC (fiber Optic Sensor Cable) fixed to the middle of the long grooved rod before buried shall detect an intruder’s pulling out the long grooved rod or lifting it upward to sneak below the FOM bottom.  An intruder being aware of the FOMGuard measure should construct a tunnel below 120cm underground, which is almost impossible to do under intruder conditions.

Standing-free FOM Fence on Rock Base

The rock base naturally offers a good anti-digging deterrent like the concrete base.  Standing-free installation on rock base is better than FOM to steel fence is both detection capability and cost.  Usually, rock base surfaces are not flat leaving holes between the FOM bottom and rock base surface for a human body to pass through.  This case can be blocked by weaving additional FOSC between the FOM bottom and rock base surface with more Concrete Fixtures (at 1m spacing for example).

Reference Sites