Fence-mounted perimeter intrusion detection system

A perimeter intrusion detection system (PIDS) is a device or sensor that detects the presence of an intruder attempting to breach the physical perimeter of a property, building, or other secured area. A PIDS is typically deployed as part of an overall

security system A security alarm is a system designed to detect intrusions, such as unauthorized entry, into a building or other areas, such as a home or school. Security alarms protect against burglary (theft) or property damage, as well as against intruders. ...

and is often found in high-security environments such as correctional facilities, airports, military bases, and nuclear plants.

Types of PIDS

A wide range of intrusion detection technologies exist in the current marketplace. The U.S. Army, as part of their reference material for personnel responsible for planning and executing security programs, divides PIDS technologies into the following categories: * Active IR *Break wire *

Electrostatic field An electric field (sometimes called E-field) is a physical field that surrounds electrically charged particles such as electrons. In classical electromagnetism, the electric field of a single charge (or group of charges) describes their capac ...

*Fence detection (typically a

fiber optic An optical fiber, or optical fibre, is a flexible glass or plastic fiber that can transmit light from one end to the other. Such fibers find wide usage in fiber-optic communications, where they permit transmission over longer distances and at ...

, microphonic cable or

accelerometer An accelerometer is a device that measures the proper acceleration of an object. Proper acceleration is the acceleration (the rate of change (mathematics), rate of change of velocity) of the object relative to an observer who is in free fall (tha ...

-based sensor mounted on the fence) * Ground motion *

Magnetic Magnetism is the class of physical attributes that occur through a magnetic field, which allows objects to attract or repel each other. Because both electric currents and magnetic moments of elementary particles give rise to a magnetic field, m ...

* Microwave detectors * Near-IR beam break * Passive IR * Ported coaxial cable * Taut wire * Seismic

Primary Application

A PIDS typically acts as an early warning system, alerting a site's alarm system while the intruder is still at the perimeter and not yet in a building or other interior area. A PIDS isn't a replacement for

surveillance cameras Closed-circuit television (CCTV), also known as video surveillance, is the use of closed-circuit television cameras to transmit a signal to a specific place on a limited set of monitors. It differs from broadcast television in that the signal ...

. The two technologies work together, with PIDS providing early intrusion detection while cameras provide real-time assessment capabilities. PIDS are often integrated with other security products like signage,

security lighting In the field of physical security, security lighting is lighting that intended to deter or detect intrusions or other criminal activity occurring on a property or site. It can also be used to increase a feeling of safety. Lighting is integral to cri ...

, intercom systems, or

loudspeakers A loudspeaker (commonly referred to as a speaker or, more fully, a speaker system) is a combination of one or more speaker drivers, an enclosure, and electrical connections (possibly including a crossover network). The speaker driver is an ...

to help deter potential intruders.

References

{{reflist Perimeter_security