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Solutions by typeIntrusion detection

Do I hear about it while they are on top, or once they are in?

Somebody is on top of the fence right now

21:40 on a Friday in June, still light. A hoarded building site in the middle of town. At the corner of the wooden hoarding somebody is halfway up: one foot on the boarding, both hands on the top edge. There is nobody inside; the crane is parked, the materials stacked, the machines locked. It took eleven seconds to reach the top, and people are walking along that pavement without noticing.

12 cameras across 8 sectors

This is how you ask for it

«Tell me if someone climbs the fence or gets in where nobody gets in, at any hour, and show me the camera so I know where they came through.»

What they take is almost never the expensive part: copper, an angle grinder, the diesel out of the machine tank. The expensive part comes after. Monday starts with an incident report, a machine that will not start and a lost day on site that nobody gets back. And there is a consequence nobody talks about: if the person who climbed over is a teenager, inside there is a lift shaft, an open trench and a site distribution board, and then the problem stops being theft.

You decide once

You decide this once, and there is barely any nuance, because on a fence no timetable applies: nobody comes in here, ever. You say which stretches are perimeter, who gets told by day and who by night, and what you want kept: video from ten seconds before, the camera and the exact point. IRIS applies it to all twelve stretches alike, at nine on a Friday evening and at four on a Tuesday morning, and it never tires of watching a fence where nothing happens for months.

Of everything a camera can see, this is the one with the least room for debate. Nobody climbs a fence by mistake. The fence is already a decision, made and written on the ground: you do not come through here. So there is nothing to interpret and nobody’s intentions to wonder about; all that is needed is for somebody to find out, and to find out soon.

And «soon» is the whole story. Finding out once they are inside is good for writing a report. Finding out while they are on top of the fence, both hands on the top rail and one leg over, is good for somebody to make a call, switch on a light, speak over the PA or send a guard who is four minutes away. Same camera, same video, same fact: the only thing that changes is how many seconds it takes to reach a human being.

IRIS watches the fence line and alerts at the moment of contact, not once the person is already walking about inside. The alert carries the camera, the point and video from a few seconds before, which is the part you need afterwards: how they got there, through where, and whether they came alone. And all of it accumulates. After a few months, the list of climbs does not tell you who comes in: it tells you where, and it is almost always two of the twelve stretches. With that you fix a fence, which is still the only thing that actually stops anyone.

What changes

Before, the perimeter alarm went off at three in the morning with no image behind it. Somebody had to decide, half asleep, whether to send a car on a forty-minute drive to find a plastic bag caught in the mesh. Now the alert arrives with the image of the moment, and in twenty seconds you can see whether there is a person on the fence or the wind has moved a tarpaulin.

Where we have seen it

  • The crest of a dam late in the afternoon. Somebody is going over the mesh gate that closes the way through: both hands on the top rail and one leg already on the other side. Beside it, the control hut with its green steel door, the red no-entry sign wired to the gate leaf and the barrier on the track. Nobody else is in shot. IRIS sees that someone has crossed a closed barrier; it does not know who they are and does not try to find out.

    CAM-144Someone climbs the gate onto the dam crest

    «Tell me the moment anyone climbs over the fence onto the crest, at any hour, and tell me which camera and where they got in.»

    See this camera →Critical infrastructure

  • Mid-morning at the terminal’s outer fence. A person with a backpack is up on the chain link, a few metres from the control booth. On the other side, on the patrol track, a guard is looking that way. Beyond the fence lies the yard: stacked containers, a truck on its way out and the ship berthed at the back. IRIS marks the exact point of the fence that was crossed, the time and the direction, and saves the video of the seconds before.

    CAM-440Somebody has come over the perimeter fence

    «Tell me if somebody climbs or crosses the fence, and show me where and at what time.»

    See this camera →Ports

  • The outer fence at dusk, with the patrol road and the wall on the right. A person in facility clothing is halfway up the mesh, gripping the razor wire at the top. Another is already on the outside, running through the scrub. On the inner road a patrol vehicle is parked and an officer is on foot, and at the corner of the wall stands the watchtower with another officer inside.

    CAM-105Someone on the perimeter fence

    «Tell me the moment anyone touches the perimeter fence, not once they are already over it.»

    See this camera →The prison

  • Eleven in the morning in the sorting hall. The mesh gate of the shredder enclosure is wide open and a worker in a yellow vest has just stepped through it: one foot is already inside and he is walking towards the machine. The shredder is still running and the conveyor keeps feeding the hopper. A moving-parts warning sign hangs on the guard panel. IRIS sees the guard open, the person inside and the machine running, all at once.

    CAM-431Someone has walked into the shredder enclosure

    «Tell me if someone enters the shredder enclosure while the machine is running.»

    See this camera →Industry

  • Late afternoon at a small drinking-water plant, up on a clifftop. The compound is closed off with mesh and wire, and the open basin sits in plain view inside. On the hillside, a person in a dark hoodie and a cap has come over the fence and is leaning on the inner rail. A worker is coming across from the gate. IRIS does not say who they are or why they came: it says a closed boundary has been crossed.

    CAM-408Somebody came over the fence and is among the tanks

    «Tell me the moment somebody crosses the fence where there is no gate, at any hour.»

    See this camera →Industry

  • Mid-morning at the coastal wind farm. The camera looks down on the tower. Out on the external platform, next to the ladder, a person is standing with no harness and nothing holding them. Below, inside the yellow and black fence, a second person walks towards the tower door, which is open. There is no vehicle on the access track. IRIS sees two people where, at this hour, nobody should be without notice.

    CAM-355Someone is on the turbine platform with no harness

    «Tell me if anyone is on a tower ladder or platform without a harness, or if someone enters the fence of a tower with no work scheduled today.»

    See this camera →Industry

  • Late afternoon at the venue’s access control. A dark van has been sitting on the crossing, in front of the barrier and right against the guard booth, tailgate towards the camera. On the right, on the restricted-area fence, a person in a dark hoodie is gripping the top rail with one foot on the wall. The guard on the pavement is looking the other way. Behind them, the public is arriving at the gates.

    CAM-488A van stopped at the barrier and someone climbing the fence

    «Tell me if anyone crosses the fence line, or if a vehicle stays stopped in front of the barrier for more than two minutes.»

    See this camera →Stadiums and venues

  • A fenced building site in the middle of the city, seen from above. At the corner of the timber hoarding a person is halfway up: one foot against the boards, both hands on the top edge. Inside you can see the debris skip, the churned-up ground and, further back, two workers in helmets and hi-vis. IRIS sees that a person is crossing the fence; it does not know who they are.

    CAM-57Someone climbing the site fence

    «Tell me if someone climbs the fence or gets in where nobody is meant to, whatever time it is, and show me the camera so I know where they came through.»

    See this camera →The building site

  • A substation at the edge of the road, seen from a lamp post on the pavement. Someone in a dark jacket has stepped up onto the low wall and is holding on to the mesh, about to go over. Inside there is nobody: the transformer, the control house and the closed gate. Here you don't have to decide how many people are too many. One person inside the fence is already the incident.

    CAM-158Someone climbing the substation fence

    «Tell me the moment somebody touches the fence or gets over it, at any hour. Nobody is supposed to be in here.»

    See this camera →Critical infrastructure

  • Afternoon concert, front row. A young man vaults the separation barrier and lands on the stage side. A cup thrown from the stands is still in the air. Two security staff are already running towards him. IRIS does not know who he is: it does not recognise faces, does not compare them with anything and keeps nobody’s identity. What it sees is a movement — a body crossing a line nobody crosses — and an object flying where nothing flies. It detects a movement, not a person.

    CAM-490Someone has jumped the barrier towards the stage

    «Tell me the moment somebody crosses the barrier towards the stage or climbs a structure, and save me the video from ten seconds before.»

    See this camera →Stadiums and venues

What it does not do

IRIS stops nobody and identifies nobody. It sees the climb, alerts and keeps the video; a person decides what happens next. And a camera is not a fence: if the boundary is broken, seeing the crossing more clearly does not fix that.

And it depends on the camera seeing. A dirty lens or a branch that has grown in front leaves a blind stretch, and that has to be known in advance, not on the day something happens.

Questions

Would a detection system on the fence itself not be better?
It depends, and the two often work well together. A system mounted on the fence notices that something touched it, and that is fast and cheap on a long perimeter. What it does not know is what touched it: the wind, a dog, a branch or a person. That is why many sites end up with the alarm switched off, which is the worst way to protect a perimeter. With a camera you do see what it was, and the person receiving the alert decides with the image in front of them instead of blind.
Does it alert while they are climbing or once they are in?
While they climb, if you set it that way, and that is the recommendation. The rule is tied to contact with the fence, not to being inside, because the whole difference between a useful alert and a report lives in those seconds. The alert comes with video from a few seconds earlier, so whoever receives it sees the full scene: how they arrived, whether they came with anyone and where they are heading. That is what you use to decide whether to call, switch on a light or send somebody who is nearby.
Does it say which point of the fence they came through?
Yes, and in the long run that is the most useful part of all. The alert carries the camera and the stretch, so whoever goes knows where to go instead of walking eight hundred metres of fence with a torch. And because everything is logged, after a few months you have a map: two stretches account for nearly all the climbs, almost always where there is a skip parked outside, a bank of earth or a tree. That is not fixed with more cameras: it is fixed by moving the skip or closing that stretch.
What about animals, wind and plastic bags?
IRIS says what it sees, and that is exactly what removes most of those alerts: it tells a person from a dog, a branch or a flapping tarpaulin, and when it does alert it sends the image so it can be checked in two seconds. We do not promise nothing extra will ever fire, because a foggy night or a dirty lens spoils any camera. What does change is that nobody has to leave the house to find out what it was: you look, you close it and you carry on.

See all the questions

The real interface, step by step

A camera looks. IRIS understands what it sees.

An extract of the real screen, no voice-over and hands-free. Each round poses another situation. What sits behind it is a good deal bigger than what you see.

  1. It lands in the tray
  2. You open it
  3. You confirm or dismiss
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IRIS raises the alert while it is happening and says where: the camera, the time and the images from that moment. With that, whoever is on duty is still in time to act.

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