How can I calculate distance via Infrared sensor?

hyon

Hello.
I am using Boe-Bot robot and Gripper, and my scenario is detect object first, approach to the object, and grap it via gripper.
So, I think I need to use infrared sensor, but I think my robot should stop before the object.
How can I get this information from sensor?
Can I have exact distance between object and my robot?

Please give me a soltion.

Thank you in advance.
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allanlane5

There IS a way to 'detune' the IR output, by sending FREQOUT 38500, then FREQOUT 32000, then FREQOUT 28000.

What happens is, the amount of IR light that actually matches the IR-Decoder's desired 38500 frequency becomes less and less, and thus the 'detect' range becomes less -- the reflected object has to be closer in order to reflect sufficient light. But this is a very rough approximation, which depends on the textrue and the color of the 'reflecting' surface.

If you MUST have 'exact distances' (which I'm not convinced you do) you could add a 'ping' sensor -- those are accurate to 10' or so.

Franklin

You could also get one of the Sharp IR sensors to get the distance.

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