How can I make my Infra red camera distinguish between 4 infra red transmitters positioned each on a corner of a square platform ?

[jen12]

I am working on an Arduino project where I use an infra red camera that measures distance along with 4 infra red LED transmitters placed each on a corner of a square platform to park a robot perfectly on this platform. However, it is important for the camera to distinguish between the 4 transmitters. (it should know the right transmitters from the left and the upper transmitters from the lower). Can anyone please help me find a solution to this problem?

 

[Nigel Goodwin]

How about pulsing the transmitters at different frequencies, and measuring the frequency to tell which is which?.

 

[jen12]

How about pulsing the transmitters at different frequencies, and measuring the frequency to tell which is which?.

I was thinking about doing so but my transmitters are infra-red LED transmitters so I think pulsing them at different frequencies won't do me any help.

 

[Nigel Goodwin]

I was thinking about doing so but my transmitters are infra-red LED transmitters so I think pulsing them at different frequencies won't do me any help.

Why not?, IR LED's are very commonly pulsed.

What do you mean by they are 'transmitters'?.

 

[Pommie]

Sounds like it's a vertical square like a garage entrance. If so, leave one transmitter out and calculate where it should be. A right angled triangle should give all the information required.

Mike.

 

[jen12]

Why not?, IR LED's are very commonly pulsed.

What do you mean by they are 'transmitters'?.

this is the link for the camera i'm using along with the Arduino code.

Gravity: IR Positioning Camera For Arduino

This is a small form factor arduino IR camera capable of tracking up to four heat/IR sources, which allows track robot, find the directions of the objects.

www.dfrobot.com

and this is a picture of the led transmitters i'm using

 

[ronsimpson]

When I was doing things like this there was no "smart camera" and libraries of code. So writing from zero, it would be easy to see lights blink.

Your camera "keeps track of 1-4 objects". I think you are using the software that does that. When you blink a LED the software will loose track of that LED. So there is much of the problem. I think you have software written for a different project and you can't get around that.

I was doing something like this but I had Red, Blue, Green, etc light so that is easy.
I had control of the light source. I could turn on/off change color of any point. If you can not directly drive the light, then you must have the LEDs blink in some pattern and then synchronize the software to the pattern. This will slow down the process.

 

[jen12]

When I was doing things like this there was no "smart camera" and libraries of code. So writing from zero, it would be easy to see lights blink.

Your camera "keeps track of 1-4 objects". I think you are using the software that does that. When you blink a LED the software will loose track of that LED. So there is much of the problem. I think you have software written for a different project and you can't get around that.

I was doing something like this but I had Red, Blue, Green, etc light so that is easy.
I had control of the light source. I could turn on/off change color of any point. If you can not directly drive the light, then you must have the LEDs blink in some pattern and then synchronize the software to the pattern. This will slow down the process.

Exactly, thank you.