Subject:
|
Re: line following
|
Newsgroups:
|
lugnet.robotics.handyboard
|
Date:
|
Wed, 16 Apr 1997 20:23:16 GMT
|
Original-From:
|
(Katt97@aol)stopspam(.com)
|
Viewed:
|
1391 times
|
| |
|
|
> Two reflective photosensors are aimed at the floor. • <snip>
> If both sensors see white then you've
> lost the line and better stop and get help.
<snip>
In my rather limited experience with reflective photosensors, I've found that
black on white is not always the best of choices -- the white can come up as
different numbers depending on how clean/dirty the floor is and the texture
of the white (is it shiny and smooth, dull and rough, patterned, etc). Maybe
use a strip of yellow tape on either side of the black (duct tape works
pretty well -- readings are pretty constant with duct tape and it sticks
really well :) ) to help defray bad readings from the sensors.
Also, if both sensors see non-black (which could be a better way to program
-- have everything in terms of black so that you lower the variables), you
could have it go around in a spiral or something, but if they go so it goes
left and right, it should not get off the tape (note the word should -- funky
things can happen!!).
-Kat-
~Class of 1997~
|
|
Message has 2 Replies:
 | | Re: line following
|
| (...) As have I, so when I wanted to build a line-follower, I used a couple of IR detectors in concert with a pair of IR emitting diodes. They were arranged on the nose of the robot as follows: 1 2 3 4 \ | | / Where 1&4 are the IR emitters and 2&3 (...) (27 years ago, 16-Apr-97, to lugnet.robotics.handyboard)
| | | Re: line following
|
| (...) The experience is good, I'm just not sure you took away the right lesson from it. :-) Everything Katt say's is true, when you are following lines detecting the line is sometimes not as straight forward as the description would have you (...) (27 years ago, 16-Apr-97, to lugnet.robotics.handyboard)
|
3 Messages in This Thread:
 
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
