PIR sensors

PIR sensors come in different shapes and sizes, allowing for different detection distances. Typically an outdoor PIR sensor is working at a distance of 12 - 15 meters.
The model I am making will only use a short range 5 meter PIR because it will be used indoors as a example.

Watts

Looking at standard security lights available to purchase in store and online the average bulb for a floodlight model is around 200 - 500 watts.
The watts required for a spotlight model to allow it to be bright enough to illuminate a target area are 60 - 200 watts.

Light, Volume or Surface?

The final product will either have a light source which moves or a light source which is reflected off a moving mirror.
I have done some research with lights to see how much lumens or Watts the light would need to be for the final product and whether or not the mirror would be required to direct the light.

Moving the surface (mirror) would be much easier than moving the volume (light) however it would complicate the product thus making it more expensive to manufacture and leave more opportunity for error.

Taking this into consideration, I have decided that the final product will probably move the light source (volume)

Adobe after effects

I am working on a video at the moment, trying to track a person in an open environment using Adobe after effects. I will hopefully have something which will convey the principle of the concept.

After effects motion track

Tracking in a Parking Lot

An example of video tracking picking up multiple objects.

Why video Tracking

Video tracking works by comparing a background image with a live video feed.
For example this video picks up the moving objects by comparing them against an empty park.

Video tracking can be highly accurate, but it is also very complicated to reproduce. I want to create a model which will prove the principle of tracking a target with a light source.

In order to do this I am plan on using PIR motion sensors and an Arduino board.

Limelight

A mock up of how the product might look.
The mirror/reflector is mounted on an X and Y axis allowing the light to be moved in any direction. The light source is mounted below the reflector and below that are the video camera and the PIR sensor which triggers the product.

I have taken the decision to go with an earlier idea which was a moving & tracking light source.
My reasons for making this choice relate to some of the research material from the police and the feedback from the questionnaires.

Business owners main use for security was to act as a deterrent.
Police records have indicated crime peaking in the darker winter months.

With the most instances of business crime taking place in the evening the logical decision seems to be to generate a product that will have a deterring effect during the evenings, when businesses tend to be unattended.

This is a qucik mock up of what the product could look like as an attachment for a building.

There would be a PIR motion sensor mounted on the bottom of the product which would activate the product when triggered. The light would then switch on and reflect off the mirror which is mounted on an X and Y axis servo.

The small camera would be able to track an intruder within the environment and send the relevant information to the mirror in order to entrap the intruder in light where the only means of escape is to remove themselves from the environment.