JennToo Radar

A demonstration of a program for a LEGO Mindstorms NXT robot.
With the JennToo Radar the a JennToo robot scans the environment using the ultrasonic sensor and displays the collected data on the screen. The idea is similar to a radar display. Afterwards, you are able to change resolution of the display to zoom in and out.

The JennToo Radar is an improved Version of the Tribot Radar.
http://www.youtube.com/watch?v=w-PNsW7b3CY

You can find Instructions for the JennToo robot here:
http://www.legoedwest.com/page.php?19

Visit http://kisd.de/~krystian/nxt for more information.

Category:

Howto & Style

Tags:

• LEGO
• Mindstorms
• NXT
• JennToo
• robot
• radar
• sonar
• ultrasonic
• scan

[Intentor]

Amazing, dear Krystian!

Have you tried some real application of this approach?

[KrystianMajewski]

Thanks!

What do you mean by "real application" ?

[Intentor]

I mean some kind of real use for the, let's say, "toy".

Maybe some kind of burglar alarm or navigation system for a robot.

Ok, maybe these aren't some kind of "real application" of the program, but, in fact, it would be nice. At least I kept myself thinking about it...

[KrystianMajewski]

I thought of making an "explorer" robot that maps the whole environment. But it would require a whole new robot and I didn't have the time (and the pieces) to build one yet.

Interpreting the radar data is also very difficult - especially in NXT-G.

[alexander0025]

how did you get the display to do that?

[KrystianMajewski]

What exactly? You might want to just check out the program if you have any questions.

[oybrj]

I would really like to build this model, but the links at broke. Does anyone have the files ? :-)

[Lumpiluk]

@Lumpiluk OK, figured it out now. I've programmed my own NXT radar for distances as well as light (e.g. for adjusting solar cells). And for the visualization I bet you used NXTScreen, made a texture of that afterwards and then used Voodoo, AfterEffects or similar for match moving ;-) (?)

[DavidWehar]

I downloaded the program but a window pops up when i try to download it to the nxt saying that the program is "broken" Do you know what i can do to fix this?

[Lumpiluk]

I am currently working on my own radar with NXC in which it will be possible to choose between a circle or graph output...

How did you manage that the US sensor scans so fast?

And what program did you use to show how the robot "sees" its environment?

[Zava40]

Would it be possible to make it move accordingly to its surroundings?

[GEAR1902]

what program did u use for photomontage???

[Intentor]

You've used NXT-G? Amazing.

I'm thinking on doing something like an "explorer" that remembers the places (sending data to a computer) using the ultrasonic sensor and a compass sensor, but in Java or C#. However, I'm facing the problem that it'd be hard for the robot to locate itself on the place without starting always on the same point. Maybe some use of a GPS can help... :-)