Perimeter Intrusion Detection Systems (PIDS).
A Perimeter Intrusion Detection System is the first line of a site's security: it detects an intruder at the boundary, before anyone reaches a building, a runway or a substation, and tells the control room exactly where. This guide explains how PIDS technologies work, how they compare and what to ask before you choose one.
Four jobs, in seconds.
Every perimeter intrusion detection system has to do the same four things, whatever the sensor inside it.
- DetectSense a real attempt to cross the line, a climb, a cut, a lift, a dig or a vehicle, and ignore what is not a threat.
- LocateReport the zone of the event, so the operator knows exactly where to look.
- AssessHand the alarm to cameras and a command screen, so the operator sees what caused it.
- RespondTrigger sirens, lights and patrols while the intruder is still at the fence.
How the main technologies work.
Each technology has a place. The right choice depends on the barrier, the climate, the threat and how many false alarms the operators can live with.
| Technology | How it detects | Where it fits | What to check |
|---|---|---|---|
| Fence-mounted vibration / microphonic cable | A cable or sensor on the fence picks up vibration and sound from climbing or cutting. | Long chain-link or mesh fences. | Can react to wind, rain and fence movement, so it needs careful calibration per zone. |
| Fibre-optic cable | Disturbance of light in a fibre attached to the fence or buried. | Very long lines, pipelines, borders. | Zone resolution and nuisance-alarm filtering depend on the system and its tuning. |
| Microwave and infrared barriers | An invisible beam between posts; an alarm when something breaks it. | Gates, open corridors, sterile zones. | Needs a clear line of sight; fog, vegetation, snow and uneven ground matter. |
| Buried and seismic sensors | Ground pressure or vibration from footsteps, digging and vehicles. | Covert lines, approach routes, pipelines. | Soil, frost and traffic nearby affect sensitivity. |
| Taut wire | Tensioned wires on sensor posts; any cut, climb or spread changes the tension. | High-security fences, military camps, airports. | Needs a dedicated wire barrier or an existing fence to carry it. |
| Strain-gauge pressure sensing, D-FENCE | Patented sensors measure real mechanical load on wall crowns, fence panels, posts, clamps, gates, roofs and floors. | Walls, architectural and security fences, cable troughs, equipment, buildings. | Responds to load, not vibration, built for minimized false alarms; no lethal voltage; retrofit or new line. |
Weight is the signal.
D-FENCE builds the sensor into the barrier itself. When a person climbs, cuts, lifts or leans, the load on the structure changes, and that change is what raises the alarm.
Real load, not noise
Strain-gauge sensors measure force, so wind, rain, birds and small animals are ignored by design.
Zone by zone
Every alarm carries its zone; the nearest camera can be on target in under 3 seconds.
Built into what is there
Under wall copings, in fence posts, on cable troughs, gates, roofs and floors, new or retrofit.
Safe by nature
Low-voltage sensors with no lethal voltage on the line.
One picture
D-Command Control puts every sensor, camera and alarm on one geolocated map.
Patented
An international PCT application and seven granted Chinese patents and utility models.
Eight questions to ask.
- Which attacks does it detect, climbing, cutting, lifting, digging, vehicles?
- What is the nuisance-alarm rate in wind, rain, snow and heat on a site like yours?
- How long is a zone, and how precisely is an event located?
- Can it be fitted to the fences and walls you already have?
- How does it connect to your cameras, VMS and command centre?
- What maintenance does it need over its service life?
- Is it safe for people and animals around the line?
- Which certifications, patents and references stand behind it?
A sensor for every boundary.
From airport fences to villa terraces, and from cable troughs to prison floors.
- D-Pressure StripWall-crown pressure sensor
- D-Taut WireTaut-wire detection fence
- D-CorativeArchitectural fence on sensor posts
- D-Welded MeshSensor-post welded mesh
- D-ConcertinaElectronic razor-wire concertina
- D-TechConcealed pressure sensor
- D-GlassGlass balustrades and walls
- D-CableCopper cable theft protection
- D-GroundBuried detection
- D-Command ControlCommand & control
Frequently asked.
What is a Perimeter Intrusion Detection System (PIDS)?
A PIDS detects and locates an attempt to breach a site's boundary, climbing, cutting, lifting or digging, and raises an alarm in the control room with the exact zone, so cameras and response teams can act at once. D-FENCE PIDS turn fences, walls, gates, roofs and even floors into sensors.
How does D-FENCE detection work?
Patented strain-gauge pressure sensors measure real mechanical load, the weight of a person on a wall crown, the pull on a taut wire, the force on a fence panel. Because they respond to load rather than to vibration, they are built for minimized false alarms from wind, rain, birds and small animals.
Can it be installed on an existing fence or wall?
Yes. D-Taut Wire, D-Corative, D-Pressure Strip and D-Tech can be added to existing fences, walls and copings, or delivered as a complete new detection line.
How fast is an intrusion reported?
From contact to alert in under 3 seconds, with the zone that was touched, so the nearest camera can be on target immediately.
Does it integrate with cameras, VMS and command systems?
Yes. D-FENCE controllers connect through dry contacts, RS232 / RS485 and IP interfaces, and D-Command Control shows every sensor, camera and alarm on one geolocated map, in the control room or on a phone.
Is the technology patented?
Yes. D-FENCE sensor technology is covered by an international PCT application (WO 2022/264140) and seven granted Chinese patents and utility models.
Which sites use D-FENCE PIDS?
Airports (Ben Gurion International Airport since 2005, Yang Yang and Yeosu in South Korea), military and border installations, power, oil and gas, rail and telecom infrastructure, ports, prisons, data centres and private residences, in 58 countries.
Is there lethal voltage on the fence?
No. D-FENCE sensors run on low voltage and put no lethal voltage on the line, which makes them suitable for public sites, homes and schools.
What about sites with no power or network?
AI-EYE IN THE SKY, an autonomous solar trailer with a telescopic camera mast, is operational in under 10 minutes with up to 72 hours of solar autonomy. NOA mobile observation systems mount thermal technology on security vehicles for an advanced layer of protection.