I am working on an Arduino project where I use an infra red camera along with 4 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?
what does the "camera" recognize? how do you drive the transmitters?
The transmitters are fixed on a platform on the floor. However the camera is fixed on a moving robot.
The camera reads the distance from its own position all the way to the transmitters. (in pixels).
The problem is that I am not able to distinguish between the transmitters. The camera is giving me values but I have no idea what transmitter the values are for.
Obviously, there needs to be something unique about each transmitter and the camera has to be able to recognize this difference.
You have not provided enough details to say any more.
Perhaps modulate the transmitters at different pulse rates?
The transmitters I am using are infra red LED transmitters.
And this is the link to the camera i'm using as well:
thank you for your replies.
the camera does not know the difference so you need to build some intelligence into the process. you could turn on each IR emitter in turn for 1s for example and find them this way. then once you know where you are as you control the robot movement you should be able to infer the expected relative movement of the IR emitters
J-M-L:
the camera does not know the difference so you need to build some intelligence into the process. you could turn on each IR emitter in turn for 1s for example and find them this way. then once you know where you are as you control the robot movement you should be able to infer the expected relative movement of the IR emitters
That brings to mind the way lighthouses at sea work. They each have a distinctive flashing pattern that is documented on navigational charts.
In this case it may only be necessary for beacon A to have a special pattern because you will know, if you turn right that the next beacon will be B, followed by C and D and back to A
...R
Have a look at the Pololu IR beacon.
Robin2:
That brings to mind the way lighthouses at sea work. They each have a distinctive flashing pattern that is documented on navigational charts.In this case it may only be necessary for beacon A to have a special pattern because you will know, if you turn right that the next beacon will be B, followed by C and D and back to A
...R
thank you!
If the camera is always viewing from above the plane of the platform you only need to identify one corner and the rest can be identified by their position clockwise. I'd have one of the LED's turn off briefly at regular intervals so it can be identified.