Society of Robots - Robot Forum

Electronics => Electronics => Topic started by: SomeSaba on September 25, 2007, 10:29:27 PM

Title: Odometers
Post by: SomeSaba on September 25, 2007, 10:29:27 PM

Hello everyone, i have a new porject that requires my robot to be able to see how far it has traveled and so on...

I dont really like encoders, as i need a bit a accuracy, but i will take that path if needed.

I was wondering what other method you guys suggest? Like i've used optical mice before, and those can be odometers (if i remember correctly), but im looking for the most accurate method/price :O

Edit: I've also seen those motors u can buy with encoders integrated in the shaft or something.... are those any good??

Edit: also to be more specifac... lets just say my project is a robot maze, and the competition is on short-nap carpet.

Any suggestions would be cool <3 thanks

Title: Re: Odometers
Post by: octagonx on September 26, 2007, 12:46:20 AM

well, optical mice requires the surface to be flat and close enough to the sensor.  I think visual odometry would be the most accurate.  It just requires image or video processing. 

Title: Re: Odometers
Post by: Ro-Bot-X on September 26, 2007, 01:03:26 AM

Take a look at Admin's Hyper Squirrel (http://www.societyofrobots.com/robot_hyper_squirrel.shtml)

Title: Re: Odometers
Post by: SomeSaba on September 26, 2007, 02:53:18 PM

Hmmm... but arent those cameras around $100? Are there any other viable methods?

Title: Re: Odometers
Post by: Admin on September 29, 2007, 02:16:12 PM

Quote

but arent those cameras around $100? Are there any other viable methods?

what camera?

the sensor I used on hypersquirrel is a sharp IR rangefinder, about $15 ;D
http://www.societyofrobots.com/sensors_sharpirrange.shtml

Title: Re: Odometers
Post by: SomeSaba on September 29, 2007, 10:41:00 PM

Oh i meant lke the CMUcams   :o

Title: Re: Odometers
Post by: creedcradle on September 29, 2007, 11:39:25 PM

the CMUCAM costs   $135.95
http://www.robotstore.com/store/product.asp?pid=762&catid=11

Quote from: Admin on September 29, 2007, 02:16:12 PM

but arent those cameras around $100? Are there any other viable methods?

 try logitech camera

and see these:

http://www.societyofrobots.com/robotforum/index.php?topic=1978.0
http://www.societyofrobots.com/robotforum/index.php?topic=242.0