SLAM, autonomeous robot

[airglide]

Hello everyone,

I want to program a robot which moves from a Point A to a Point B in a room full of furniture.

I thought I'd be great to see on a map whats happening and to use the map also as a "pathfinder". That the robot knows where he had already been. Well, the problem is I don't really know something about SLAM and how to filter the noise out of the sensors.

Can someone give me a hint how I could solve that problem? Or where I could learn something about that?
Is it necessary to filter out the noise if I have a sensor, which shows where he should go?
Is there a possibility of a sensor which sends/receives a signal so the robot know in which direction he should go?

btw I have 2 Ultrasonic sensors but would buy probably a sensor which is more exact.

sorry for the many questions

Thank you for your help

airglide

[Aswin]

Hi,

One can build a robot hat finds its way using US sensors. Read this blog posts for an example.
http://nxttime.wordpress.com/2012/02/27 ... guard-bot/
http://nxttime.wordpress.com/2012/03/05/a-range-map/

[airglide]

wow, that's what I've looked for, thank you very much

Is there a sender which I can place at the point B like a GPS and the robot can receive the signal so he knows where he should go?

[Rickz2020]

You can do this:

Calculate the bearing for the destination based on it's GPS coordinates
Have the robot rotate so that it matches the destination bearing
Make the robot move towards the destination until it's GPS reading matches that of the destination.

EG:

Destination = 53.4235(lat), 54.1456(lon)
Robot's current location = 51.1234(lat), 51.2134(lon)

Calculate the bearing using the Destination
Lets pretend the bearing = 55 degrees

Rotate the robot until it is facing 55 degrees... Now it should be looking in the correct direction

Now, while Robot current location != Destination
move forward...

[ljw7630]

Maybe you found a good answer. Just talk about what I am doing.

I use sonic data with bayes filter to build an occupancy map.

and then manually pick up a destination point from the map, and use A* algorithm to find a path from starting point to destination.