Line sensor
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Subject Author Date
Line sensor Tom 10-29-2005
---> Re: Line sensor Colin Durrans11-12-2005
`--> Re: Line sensor Ashley Clarke11-12-2005
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Posted by Tom on October 29, 2005, 2:36 pm
I am about to build a line sensor for a robot.

It should be able to follow a black line on a surface with different shades
of gray.

It would be good if the distance from the sensor to the surface could be 2
inches or more, but it is not a must. But redundancy to ambient light is
important.

Could anyone please point me in directions of a stable solution?



/Tom




Posted by Rich Webb on October 29, 2005, 9:13 pm
On Sat, 29 Oct 2005 20:36:11 +0200, "Tom"

>I am about to build a line sensor for a robot.
>It should be able to follow a black line on a surface with different shades
>of gray.
>It would be good if the distance from the sensor to the surface could be 2
>inches or more, but it is not a must. But redundancy to ambient light is
>important.
>Could anyone please point me in directions of a stable solution?

One possibility: http://www.jrobot.net/Projects/AVRcam.html

I haven't tried it, but it's on my to-do list.

--
Rich Webb Norfolk, VA

Posted by RoboRealm on October 30, 2005, 9:09 pm
If vision is a possiblility then check out this online tutorial on one
way to use vision in a mobile robot to follow a line:

http://www.roborealm.com/tutorial/line_following/slide010.php

Works well for all sorts of lines ... even broken ones!


Posted by Mitch Berkson on October 31, 2005, 9:32 am
RoboRealm wrote:
> If vision is a possiblility then check out this online tutorial on one
> way to use vision in a mobile robot to follow a line:
> http://www.roborealm.com/tutorial/line_following/slide010.php
> Works well for all sorts of lines ... even broken ones!

Excellent tutorial.

Mitch



Posted by Tom on October 31, 2005, 1:38 pm

Thanks for the inputs.

I can see that some type of camera based system would be a good approach.

But the programming gets a bit complex, so I was planning for a solution
with LEDs and photo transistors.

Any suggestions on a stable system build that way?

/Tom




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