CAM-474

The emergency exit blocked by a car and a person on the ground

Night on level -2. A grey SUV is stopped with its nose in the opening of the emergency exit, on top of the green area painted on the floor with the running figure. The stairs can be seen behind the door. A few metres away, out on the aisle, a man is lying face down, still. The lighting is poor and much of the frame is dark. IRIS sees all three things at once: the route blocked, the area without light and somebody motionless where nobody lies down.

CAM-474 · FIRE EXIT ROUTE · ROUTE BLOCKED

What IRIS understands

What it recognises in this scene

car stopped on the emergency exit
person lying on the ground, motionless
emergency exit door and stairs
green evacuation area painted on the floor
emergency exit sign on the pillar

What this camera measures

An alert says something is happening. The reading says how much.

19 minTime with the exit blocked
3 minTime the person has not moved
1People in shot
6Vehicles in shot
21:38Time

The figures on this screen are an example from the illustration, not any client's measurement.

The rule

You decide once. IRIS applies it always.

a vehicle stops on the evacuation route or a person has been motionless on the ground for a minute

Then

alert the control desk with the level, the camera and the time
save the video from the moment the vehicle stopped or the person went down
time how long the exit stays blocked

The instruction that set it up«Alert me if anyone parks on the emergency exit or if there is a person on the ground not moving.»

What changes

What changes for whoever runs the car park

Three things that only matter on the day you have to run, and on that day they can no longer be fixed: a car on the evacuation lane, an area without light and somebody who has not moved for a while. All three can be seen and timed, so they stop depending on somebody happening to walk past. The manager gets the alert while it is happening and keeps the record of how long that exit was blocked — the first thing an inspection asks for.

What people usually ask

Does IRIS know what is wrong with the person on the ground?

No, and it does not try to. IRIS does not diagnose and does not identify anyone: it sees that somebody is lying where nobody lies down and has not moved for a while. On that basis it raises the alert and saves the video. Who that person is and what is wrong is established by whoever gets there — and the point is that they get there sooner.

How does it tell a badly parked car from one that is just passing through?

With the clock. The evacuation area is drawn on the image once and IRIS times how long a vehicle stays inside it. A car driving across never reaches the limit; one that stays does. And the limit is set by the car park, not by IRIS: what counts as an alert and what does not is always decided by whoever runs the site.

Does it also warn if the lighting on a level fails?

Yes. An area that was lit and stops being lit is a visible change, and an evacuation route in the dark is a continuity and an inspection problem. IRIS reports the change with the level and the time, and keeps a record of how long it has been that way. Changing the light fitting, obviously, is a job for a person.

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