Society of Robots - Robot Forum

Electronics => Electronics => Topic started by: JoeSkull on November 20, 2008, 01:48:28 PM

Title: How many sensors do I Need??
Post by: JoeSkull on November 20, 2008, 01:48:28 PM
I thinking of making a robot with sonar,
and I need to know if I make a robot with 4 sonar sensors do I need any additional sensors??
Or would 4 sonars keep me from running into stuff??
Title: Re: How many sensors do I Need??
Post by: Trumpkin on November 20, 2008, 02:41:16 PM
You only need 1 SONAR sensor (with a scanning servo) to keep you from running into stuff.
Title: Re: How many sensors do I Need??
Post by: JoeSkull on November 20, 2008, 02:47:06 PM
true
i just didn't want to have to move it around
but i guess i could
which do you think will work better??
Title: Re: How many sensors do I Need??
Post by: dt on November 20, 2008, 03:15:22 PM
true
i just didn't want to have to move it around
but i guess i could
which do you think will work better??
I'd say 1 sonar with servo because it's cheaper that way :o
Title: Re: How many sensors do I Need??
Post by: paulstreats on November 20, 2008, 03:31:26 PM
You can also get back richer data more easily by mounting it on a servo. (meaning you can scan the servo left and right without having to scan by moving the full robot)
Title: Re: How many sensors do I Need??
Post by: SciTech02 on November 20, 2008, 03:36:42 PM
Also, you could use two sonar sensors at the front of the robot at an angle from each other.  It's simple to implement and program, but it only covers the front of the robot (The back remains open).  Personally, I think you should try to put the two sonars on top of a single scanning servo.  This is what Admin did with one of his older robots (I forgot the name).
Title: Re: How many sensors do I Need??
Post by: JoeSkull on November 20, 2008, 04:27:26 PM
i have decided to go with 2 sonar angled down, rotating, on top.
it seems to fit my needs better.
Title: Re: How many sensors do I Need??
Post by: Admin on November 25, 2008, 03:18:54 AM
Quote
This is what Admin did with one of his older robots (I forgot the name).
Actually I've never put sonar on a servo before . . . my Fuzzy robot has fixed sonar and sharp IR on a servo, perhaps that one?